add preliminary LEON support

SVN-Revision: 25139
2011-01-27 12:51:25 +00:00
parent a361eab890
commit 0f325459ea
29 changed files with 2217 additions and 0 deletions
--- a/target/linux/leon/Makefile
+++ b/target/linux/leon/Makefile
@@ -0,0 +1,22 @@
+#
+# Copyright (C) 2011 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+
+ARCH:=sparc
+BOARD:=leon
+BOARDNAME:=LEON
+FEATURES+=fpu tgz
+
+CFLAGS:=-Os -pipe -mcpu=v8 -funit-at-a-time
+KERNELNAME:="uImage"
+
+LINUX_VERSION:=2.6.36.2
+MAINTAINER:=Imre Kaloz <kaloz@openwrt.org>
+
+include $(INCLUDE_DIR)/target.mk
+
+$(eval $(call BuildTarget))
--- a/target/linux/leon/config-default
+++ b/target/linux/leon/config-default
@@ -0,0 +1,138 @@
+# CONFIG_64BIT is not set
+CONFIG_ARCH_DEFCONFIG="arch/sparc/configs/sparc32_defconfig"
+CONFIG_ARCH_MAY_HAVE_PC_FDC=y
+CONFIG_ARCH_NO_VIRT_TO_BUS=y
+# CONFIG_ARCH_SUPPORTS_MSI is not set
+CONFIG_ARCH_USES_GETTIMEOFFSET=y
+CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
+# CONFIG_ARPD is not set
+CONFIG_ATA=y
+CONFIG_AUDIT_ARCH=y
+CONFIG_BITS=32
+# CONFIG_BLK_DEV_INITRD is not set
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_BOUNCE=y
+# CONFIG_BRIDGE is not set
+# CONFIG_BSD_PROCESS_ACCT is not set
+CONFIG_COMPAT_BRK=y
+CONFIG_CONSOLE_TRANSLATIONS=y
+CONFIG_DEBUG_BUGVERBOSE=y
+CONFIG_DECOMPRESS_LZMA=y
+CONFIG_DNOTIFY=y
+CONFIG_DUMMY_CONSOLE=y
+CONFIG_ELF_CORE=y
+CONFIG_EMULATED_CMPXCHG=y
+CONFIG_ENABLE_MUST_CHECK=y
+CONFIG_FB=y
+# CONFIG_FB_IGA is not set
+# CONFIG_FB_SBUS is not set
+# CONFIG_FB_SM7XX is not set
+# CONFIG_FB_XGI is not set
+# CONFIG_FIRMWARE_EDID is not set
+CONFIG_FIRMWARE_IN_KERNEL=y
+# CONFIG_FONTS is not set
+# CONFIG_FONT_SUN12x22 is not set
+CONFIG_FONT_SUN8x16=y
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
+# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
+CONFIG_FS_POSIX_ACL=y
+CONFIG_GENERIC_ACL=y
+CONFIG_GENERIC_CMOS_UPDATE=y
+CONFIG_GENERIC_FIND_LAST_BIT=y
+CONFIG_GENERIC_FIND_NEXT_BIT=y
+CONFIG_GENERIC_ISA_DMA=y
+# CONFIG_GRETH is not set
+# CONFIG_HAMRADIO is not set
+CONFIG_HAPPYMEAL=y
+CONFIG_HAS_DMA=y
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT=y
+CONFIG_HAVE_ARCH_TRACEHOOK=y
+CONFIG_HAVE_DMA_API_DEBUG=y
+CONFIG_HAVE_DMA_ATTRS=y
+# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
+CONFIG_HAVE_IDE=y
+CONFIG_HAVE_OPROFILE=y
+CONFIG_HAVE_PERF_EVENTS=y
+CONFIG_HID=m
+CONFIG_HID_SUPPORT=y
+CONFIG_HIGHMEM=y
+CONFIG_HW_CONSOLE=y
+CONFIG_HZ=250
+# CONFIG_HZ_100 is not set
+CONFIG_HZ_250=y
+CONFIG_INOTIFY_USER=y
+CONFIG_INPUT=y
+CONFIG_INPUT_EVDEV=y
+CONFIG_INPUT_POLLDEV=y
+CONFIG_LEGACY_PTYS=y
+CONFIG_LEGACY_PTY_COUNT=256
+CONFIG_LOCK_KERNEL=y
+# CONFIG_MISC_DEVICES is not set
+# CONFIG_MTD is not set
+CONFIG_MUTEX_SPIN_ON_OWNER=y
+# CONFIG_MYRI_SBUS is not set
+CONFIG_NEED_DMA_MAP_STATE=y
+CONFIG_NEED_SG_DMA_LENGTH=y
+CONFIG_NR_CPUS=4
+CONFIG_OF=y
+CONFIG_OF_DEVICE=y
+CONFIG_PAGEFLAGS_EXTENDED=y
+# CONFIG_PARTITION_ADVANCED is not set
+CONFIG_PATA_CMD64X=y
+CONFIG_PCI=y
+CONFIG_PCI_DISABLE_COMMON_QUIRKS=y
+CONFIG_PERF_USE_VMALLOC=y
+CONFIG_PROC_PAGE_MONITOR=y
+CONFIG_RELAY=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_BQ4802=y
+CONFIG_RTC_DRV_M48T59=y
+CONFIG_SATA_PMP=y
+CONFIG_SBUS=y
+CONFIG_SBUSCHAR=y
+# CONFIG_SCHED_HRTICK is not set
+CONFIG_SCSI=y
+# CONFIG_SCSI_LOWLEVEL is not set
+# CONFIG_SCSI_MULTI_LUN is not set
+CONFIG_SERIAL_8250_NR_UARTS=4
+CONFIG_SERIAL_8250_RUNTIME_UARTS=4
+CONFIG_SERIAL_CONSOLE=y
+CONFIG_SERIAL_SUNCORE=y
+CONFIG_SERIAL_SUNSAB=y
+CONFIG_SERIAL_SUNSAB_CONSOLE=y
+CONFIG_SERIAL_SUNSU=y
+CONFIG_SERIAL_SUNSU_CONSOLE=y
+# CONFIG_SERIAL_SUNZILOG is not set
+# CONFIG_SLAB is not set
+CONFIG_SLUB=y
+CONFIG_SMP=y
+CONFIG_SPARC=y
+CONFIG_SPARC32=y
+CONFIG_SPARC32_PCI=y
+CONFIG_SPARC32_SMP=y
+# CONFIG_SPARC64 is not set
+# CONFIG_SPARC_LED is not set
+CONFIG_SPARC_LEON=y
+CONFIG_STOP_MACHINE=y
+# CONFIG_SUNBMAC is not set
+# CONFIG_SUNLANCE is not set
+# CONFIG_SUNQE is not set
+# CONFIG_SUN_JSFLASH is not set
+CONFIG_SUN_OPENPROMFS=y
+CONFIG_SUN_OPENPROMIO=y
+CONFIG_SUN_PARTITION=y
+CONFIG_SUN_PM=y
+# CONFIG_TADPOLE_TS102_UCTRL is not set
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_TREE_RCU=y
+CONFIG_UID16=y
+CONFIG_USB_SUPPORT=y
+# CONFIG_VLAN_8021Q is not set
+CONFIG_VM_EVENT_COUNTERS=y
+CONFIG_VT=y
+CONFIG_VT_CONSOLE=y
+CONFIG_VT_HW_CONSOLE_BINDING=y
+# CONFIG_WATCHDOG is not set
--- a/target/linux/leon/image/Makefile
+++ b/target/linux/leon/image/Makefile
@@ -0,0 +1,19 @@
+#
+# Copyright (C) 2011 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/image.mk
+
+define Image/Prepare
+	cp $(LINUX_DIR)/arch/sparc/boot/uImage $(KDIR)/uImage
+endef
+
+define Image/BuildKernel
+	mkdir -p $(BIN_DIR)
+	cp $(KDIR)/uImage $(BIN_DIR)/$(IMG_PREFIX)-uImage
+endef
+
+$(eval $(call BuildImage))
--- a/target/linux/leon/patches/001-find_irq_and_timer_via_of.patch
+++ b/target/linux/leon/patches/001-find_irq_and_timer_via_of.patch
@@ -0,0 +1,48 @@
+From af1da1d5a8701f39cdbae4a0ab8e04b450eef298 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 8 Sep 2010 18:05:38 +0200
+Subject: [PATCH] SPARC/LEON: find IRQ and Timer via OF-Tree, instead of hardcoded.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ arch/sparc/kernel/leon_kernel.c |   23 ++++++++++++++++++++++-
+ 1 files changed, 22 insertions(+), 1 deletions(-)
+
+--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
+@@ -105,13 +105,34 @@ static void leon_disable_irq(unsigned in
+ void __init leon_init_timers(irq_handler_t counter_fn)
+ {
+ 	int irq;
+	struct device_node *rootnp, *np;
+	struct property *pp;
+	int len;
+ 
+ 	leondebug_irq_disable = 0;
+ 	leon_debug_irqout = 0;
+ 	master_l10_counter = (unsigned int *)&dummy_master_l10_counter;
+ 	dummy_master_l10_counter = 0;
+ 
+-	if (leon3_gptimer_regs && leon3_irqctrl_regs) {
+	/* Find IRQMP IRQ Controller Registers base address otherwise bail out. */
+	rootnp = of_find_node_by_path("/ambapp0");
+	if (rootnp && (np=of_find_node_by_name(rootnp, "GAISLER_IRQMP"))) {
+		pp = of_find_property(np, "reg", &len);
+		if (pp)
+			leon3_irqctrl_regs = *(struct leon3_irqctrl_regs_map **)pp->value;
+	}
+
+	/* Find GPTIMER Timer Registers base address otherwise bail out. */
+	if (rootnp && (np=of_find_node_by_name(rootnp, "GAISLER_GPTIMER"))) {
+		pp = of_find_property(np, "reg", &len);
+		if (pp)
+			leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)pp->value;
+		pp = of_find_property(np, "interrupts", &len);
+		if (pp)
+			leon3_gptimer_irq = *(unsigned int *)pp->value;
+	}
+
+	if (leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq) {
+ 		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].val, 0);
+ 		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].rld,
+ 				      (((1000000 / 100) - 1)));
--- a/target/linux/leon/patches/002-sparc_uimage_target.patch
+++ b/target/linux/leon/patches/002-sparc_uimage_target.patch
@@ -0,0 +1,79 @@
+From 234ef25344b567b3b8dad62c0863ebe16377528f Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Tue, 14 Sep 2010 11:26:55 +0200
+Subject: [PATCH] SPARC: added U-Boot build target: uImage
+
+---
+ arch/sparc/Makefile      |    3 ++-
+ arch/sparc/boot/Makefile |   35 +++++++++++++++++++++++++++++++++++
+ 2 files changed, 37 insertions(+), 1 deletions(-)
+
+--- a/arch/sparc/Makefile
+++ b/arch/sparc/Makefile
+@@ -88,7 +88,7 @@ boot := arch/sparc/boot
+ # Default target
+ all: zImage
+ 
+-image zImage tftpboot.img vmlinux.aout: vmlinux
+image zImage uImage tftpboot.img vmlinux.aout: vmlinux
+ 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
+ 
+ archclean:
+@@ -102,6 +102,7 @@ ifeq ($(ARCH),sparc)
+ define archhelp
+   echo  '* image        - kernel image ($(boot)/image)'
+   echo  '* zImage       - stripped kernel image ($(boot)/zImage)'
+  echo  '  uImage       - U-Boot SPARC32/LEON Image'
+   echo  '  tftpboot.img - image prepared for tftp'
+ endef
+ else
+--- a/arch/sparc/boot/Makefile
+++ b/arch/sparc/boot/Makefile
+@@ -5,6 +5,7 @@
+ 
+ ROOT_IMG	:= /usr/src/root.img
+ ELFTOAOUT	:= elftoaout
+MKIMAGE 	:= $(srctree)/scripts/mkuboot.sh
+ 
+ hostprogs-y	:= piggyback_32 piggyback_64 btfixupprep
+ targets		:= tftpboot.img btfix.o btfix.S image zImage vmlinux.aout
+@@ -90,5 +91,39 @@ $(obj)/tftpboot.img: $(obj)/image $(obj)
+ $(obj)/vmlinux.aout: vmlinux FORCE
+ 	$(call if_changed,elftoaout)
+ 	@echo '  kernel: $@ is ready'
+else
+
+# The following lines make a readable image for U-Boot.
+#  uImage   - Binary file read by U-boot
+#  uImage.o - object file of uImage for loading with a
+#             flash programmer understanding ELF.
+
+OBJCOPYFLAGS_image.bin := -S -O binary -R .note -R .comment
+$(obj)/image.bin: $(obj)/image FORCE
+	$(call if_changed,objcopy)
+
+$(obj)/image.gz: $(obj)/image.bin
+	$(call if_changed,gzip)
+
+# Start of Main memory
+ifndef UIMAGE_LOADADDR
+UIMAGE_LOADADDR=0x40004000
+ endif
+ 
+# The first sector after the U-Boot image (256k)
+ifndef UIMAGE_FLASHADDR
+UIMAGE_FLASHADDR=0x00040000
+endif
+
+quiet_cmd_uimage = UIMAGE  $@
+      cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A sparc -O linux -T kernel \
+               -C gzip -a $(UIMAGE_LOADADDR) -e 0xf0004000 -n 'Linux-$(KERNELRELEASE)' \
+               -d $< $@
+
+targets += uImage
+$(obj)/uImage: $(obj)/image.gz
+	$(call if_changed,uimage)
+	sparc-linux-ld -Tdata $(UIMAGE_FLASHADDR) -r -b binary arch/sparc/boot/uImage -o arch/sparc/boot/uImage.o
+	@echo '  Image $@ is ready'
+
+endif
--- a/target/linux/leon/patches/003-smp_cpu_stuck_fix.patch
+++ b/target/linux/leon/patches/003-smp_cpu_stuck_fix.patch
@@ -0,0 +1,23 @@
+From 417bc6751fdd3c24df274f25e020ec3decd09280 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Thu, 16 Sep 2010 11:00:46 +0200
+Subject: [PATCH] Fixed SPARC/LEON SMP CPU Stuck problem.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ arch/sparc/kernel/leon_smp.c |    4 ++--
+ 1 files changed, 2 insertions(+), 2 deletions(-)
+
+--- a/arch/sparc/kernel/leon_smp.c
+++ b/arch/sparc/kernel/leon_smp.c
+@@ -56,8 +56,8 @@ void __init leon_configure_cache_smp(voi
+ static inline unsigned long do_swap(volatile unsigned long *ptr,
+ 				    unsigned long val)
+ {
+-	__asm__ __volatile__("swapa [%1] %2, %0\n\t" : "=&r"(val)
+-			     : "r"(ptr), "i"(ASI_LEON_DCACHE_MISS)
+	__asm__ __volatile__("swapa [%2] %3, %0\n\t" : "=&r"(val)
+			     : "0"(val), "r"(ptr), "i"(ASI_LEON_DCACHE_MISS)
+ 			     : "memory");
+ 	return val;
+ }
--- a/target/linux/leon/patches/004-extended_irq_controller.patch
+++ b/target/linux/leon/patches/004-extended_irq_controller.patch
@@ -0,0 +1,119 @@
+From a729672f117df3602b6d3171d8ab7a84bf53b053 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Thu, 16 Sep 2010 11:12:41 +0200
+Subject: [PATCH] SPARC/LEON: added support for Extended IRQ controller, partial patches are already in git tree.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ arch/sparc/include/asm/irq_32.h |    4 ++++
+ arch/sparc/kernel/irq_32.c      |   32 ++++++++++++++++++++++++++------
+ arch/sparc/kernel/leon_kernel.c |    8 +++++++-
+ 3 files changed, 37 insertions(+), 7 deletions(-)
+
+--- a/arch/sparc/include/asm/irq_32.h
+++ b/arch/sparc/include/asm/irq_32.h
+@@ -6,7 +6,11 @@
+ #ifndef _SPARC_IRQ_H
+ #define _SPARC_IRQ_H
+ 
+#ifdef CONFIG_SPARC_LEON
+#define NR_IRQS    32
+#else
+ #define NR_IRQS    16
+#endif
+ 
+ #include <linux/interrupt.h>
+ 
+--- a/arch/sparc/kernel/irq_32.c
+++ b/arch/sparc/kernel/irq_32.c
+@@ -110,6 +110,11 @@ EXPORT_SYMBOL(__raw_local_irq_save);
+ EXPORT_SYMBOL(raw_local_irq_enable);
+ EXPORT_SYMBOL(raw_local_irq_restore);
+ 
+#ifdef CONFIG_SPARC_LEON
+extern unsigned int sparc_leon_eirq;
+extern int sparc_leon_eirq_get(int eirq, int cpu);
+#endif
+
+ /*
+  * Dave Redman (djhr@tadpole.co.uk)
+  *
+@@ -222,10 +227,11 @@ void free_irq(unsigned int irq, void *de
+ 		return;
+ 	}
+ 	cpu_irq = irq & (NR_IRQS - 1);
+-        if (cpu_irq > 14) {  /* 14 irq levels on the sparc */
+-                printk("Trying to free bogus IRQ %d\n", irq);
+-                return;
+-        }
+	/* 14 irq levels on the sparc, however some LEON systems have 31 IRQs */
+	if ((cpu_irq == 15) || (cpu_irq >= NR_IRQS)) {  
+		printk("Trying to free bogus IRQ %d\n", irq);
+		return;
+	}
+ 
+ 	spin_lock_irqsave(&irq_action_lock, flags);
+ 
+@@ -303,7 +309,14 @@ void unexpected_irq(int irq, void *dev_i
+         int i;
+ 	struct irqaction * action;
+ 	unsigned int cpu_irq;
+-	
+
+#ifdef CONFIG_SPARC_LEON
+	/* LEON Extended IRQ requires one extra IRQ Number fetch stage */
+	if ( sparc_leon_eirq == irq ) {
+		irq = sparc_leon_eirq_get(irq, smp_processor_id());
+	}
+#endif
+
+ 	cpu_irq = irq & (NR_IRQS - 1);
+ 	action = sparc_irq[cpu_irq].action;
+ 
+@@ -330,6 +343,13 @@ void handler_irq(int irq, struct pt_regs
+ 	extern void smp4m_irq_rotate(int cpu);
+ #endif
+ 
+#ifdef CONFIG_SPARC_LEON
+	/* LEON Extended IRQ requires one extra IRQ Number fetch stage */
+	if ( sparc_leon_eirq == irq ) {
+		irq = sparc_leon_eirq_get(irq, cpu);
+	}
+#endif
+
+ 	old_regs = set_irq_regs(regs);
+ 	irq_enter();
+ 	disable_pil_irq(irq);
+@@ -526,7 +546,7 @@ int request_irq(unsigned int irq,
+ 		return sun4d_request_irq(irq, handler, irqflags, devname, dev_id);
+ 	}
+ 	cpu_irq = irq & (NR_IRQS - 1);
+-	if(cpu_irq > 14) {
+	if(cpu_irq == 15) {
+ 		ret = -EINVAL;
+ 		goto out;
+ 	}
+--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
+@@ -104,7 +104,7 @@ static void leon_disable_irq(unsigned in
+ 
+ void __init leon_init_timers(irq_handler_t counter_fn)
+ {
+-	int irq;
+	int irq, eirq;
+ 	struct device_node *rootnp, *np;
+ 	struct property *pp;
+ 	int len;
+@@ -153,6 +153,12 @@ void __init leon_init_timers(irq_handler
+ 		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl, 0);
+ # endif
+ 
+		LEON3_BYPASS_STORE_PA(&(leon3_irqctrl_regs->mask[0]), 0);
+		eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus) >> 16) & 0xf;
+		if ( eirq != 0 ) {
+			/* Extended IRQ controller available */
+			sparc_leon_eirq_register(eirq);
+		}
+ 	} else {
+ 		printk(KERN_ERR "No Timer/irqctrl found\n");
+ 		BUG();
--- a/target/linux/leon/patches/005-avoid_openprom_duplicates.patch
+++ b/target/linux/leon/patches/005-avoid_openprom_duplicates.patch
@@ -0,0 +1,58 @@
+From 486a578298b7ab45c3edfdce8d4feaef93c3229b Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Thu, 16 Sep 2010 11:15:37 +0200
+Subject: [PATCH] SPARC/LEON: to avoid name duplicates in openprom fs when REG is not available the NAME now includes NODE ID when REG not present
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ arch/sparc/kernel/prom_32.c |   27 +++++++++++++++++++--------
+ 1 files changed, 19 insertions(+), 8 deletions(-)
+
+--- a/arch/sparc/kernel/prom_32.c
+++ b/arch/sparc/kernel/prom_32.c
+@@ -136,18 +136,29 @@ static void __init ebus_path_component(s
+ /* "name:vendor:device@irq,addrlo" */
+ static void __init ambapp_path_component(struct device_node *dp, char *tmp_buf)
+ {
+-	struct amba_prom_registers *regs; unsigned int *intr;
+-	unsigned int *device, *vendor;
+	struct amba_prom_registers *regs;
+	unsigned int *intr, *device, *vendor, reg0;
+ 	struct property *prop;
+	int interrupt = 0;
+ 
+	/* In order to get a unique ID in the device tree (multiple AMBA devices 
+	 * may have the same name) the node number is printed
+	 */
+ 	prop = of_find_property(dp, "reg", NULL);
+-	if (!prop)
+-		return;
+-	regs = prop->value;
+	if (!prop) {
+		reg0 = (unsigned int)dp->phandle;
+	} else {
+		regs = prop->value;
+		reg0 = regs->phys_addr;
+	}
+
+	/* Not all cores have Interrupt */
+ 	prop = of_find_property(dp, "interrupts", NULL);
+ 	if (!prop)
+-		return;
+-	intr = prop->value;
+		intr = &interrupt; /* IRQ0 does not exist */
+	else
+		intr = prop->value;
+
+ 	prop = of_find_property(dp, "vendor", NULL);
+ 	if (!prop)
+ 		return;
+@@ -159,7 +170,7 @@ static void __init ambapp_path_component
+ 
+ 	sprintf(tmp_buf, "%s:%d:%d@%x,%x",
+ 		dp->name, *vendor, *device,
+-		*intr, regs->phys_addr);
+		*intr, reg0);
+ }
+ 
+ static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
--- a/target/linux/leon/patches/006-amp_support.patch
+++ b/target/linux/leon/patches/006-amp_support.patch
@@ -0,0 +1,85 @@
+From 25a68b8cd8ea1553f8b56278418d6c1ecc12e247 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 22 Sep 2010 10:19:34 +0200
+Subject: [PATCH] SPARC/LEON: added support for AMP systems with IRQAMP IRQ Controller.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ arch/sparc/include/asm/leon.h      |   12 ++++++++++++
+ arch/sparc/include/asm/leon_amba.h |    6 +++---
+ arch/sparc/kernel/leon_kernel.c    |   14 ++++++++++++++
+ 3 files changed, 29 insertions(+), 3 deletions(-)
+
+--- a/arch/sparc/include/asm/leon.h
+++ b/arch/sparc/include/asm/leon.h
+@@ -224,6 +224,18 @@ static inline void sparc_leon3_disable_c
+ 			  "sta %%l2, [%%g0] 2\n\t" : : : "l1", "l2");
+ };
+ 
+static inline unsigned long sparc_leon3_asr17(void)
+{
+	u32 asr17;
+	__asm__ __volatile__ ("rd %%asr17, %0\n\t" : "=r"(asr17));
+	return asr17;
+};
+
+static inline int sparc_leon3_cpuid(void)
+{
+	return sparc_leon3_asr17() >> 28;
+}
+
+ #endif /*!__ASSEMBLY__*/
+ 
+ #ifdef CONFIG_SMP
+--- a/arch/sparc/include/asm/leon_amba.h
+++ b/arch/sparc/include/asm/leon_amba.h
+@@ -100,9 +100,8 @@ struct leon3_irqctrl_regs_map {
+ 	u32 mpbroadcast;
+ 	u32 notused02;
+ 	u32 notused03;
+-	u32 notused10;
+-	u32 notused11;
+-	u32 notused12;
+	u32 ampctrl;
+	u32 icsel[2];
+ 	u32 notused13;
+ 	u32 notused20;
+ 	u32 notused21;
+@@ -112,6 +111,7 @@ struct leon3_irqctrl_regs_map {
+ 	u32 force[16];
+ 	/* Extended IRQ registers */
+ 	u32 intid[16];	/* 0xc0 */
+	u32 unused[(0x1000-0x100)/4];
+ };
+ 
+ struct leon3_apbuart_regs_map {
+--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
+@@ -108,6 +108,7 @@ void __init leon_init_timers(irq_handler
+ 	struct device_node *rootnp, *np;
+ 	struct property *pp;
+ 	int len;
+	int cpu, icsel;
+ 
+ 	leondebug_irq_disable = 0;
+ 	leon_debug_irqout = 0;
+@@ -153,6 +154,19 @@ void __init leon_init_timers(irq_handler
+ 		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl, 0);
+ # endif
+ 
+		/* The IRQ controller may (if implemented) consist of multiple
+		 * IRQ controllers, each mapped on a 4Kb boundary.
+		 * Each CPU may be routed to different IRQCTRLs, however
+		 * we assume that all CPUs (in SMP system) is routed to the
+		 * same IRQ Controller, and for non-SMP only one IRQCTRL is
+		 * accessed anyway.
+		 * In AMP systems, Linux may not be run on CPU0.
+		 */
+		cpu = sparc_leon3_cpuid();
+		icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[cpu/8]);
+		icsel = (icsel >> ((7 - (cpu&0x7)) * 4)) & 0xf;
+		leon3_irqctrl_regs += icsel;
+
+ 		LEON3_BYPASS_STORE_PA(&(leon3_irqctrl_regs->mask[0]), 0);
+ 		eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus) >> 16) & 0xf;
+ 		if ( eirq != 0 ) {
--- a/target/linux/leon/patches/007-amp_timer.patch
+++ b/target/linux/leon/patches/007-amp_timer.patch
@@ -0,0 +1,119 @@
+From 1dffe06838c26b7c3fc99f9ddb7db78e378f6908 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 22 Sep 2010 13:21:13 +0200
+Subject: [PATCH] SPARC/LEON: added support for selecting Timer Core and Timer within core, useful for AMP systems.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ arch/sparc/kernel/leon_kernel.c |   41 +++++++++++++++++++++++++-------------
+ 1 files changed, 27 insertions(+), 14 deletions(-)
+
+--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
+@@ -23,15 +23,16 @@
+ #include "prom.h"
+ #include "irq.h"
+ 
+-struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address, initialized by amba_init() */
+-struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address, initialized by amba_init() */
+struct leon3_irqctrl_regs_map *leon3_irqctrl_regs = NULL; /* interrupt controller base address, initialized by amba_init() */
+struct leon3_gptimer_regs_map *leon3_gptimer_regs = NULL; /* timer controller base address, initialized by amba_init() */
+ struct amba_apb_device leon_percpu_timer_dev[16];
+ 
+ int leondebug_irq_disable;
+ int leon_debug_irqout;
+ static int dummy_master_l10_counter;
+ 
+-unsigned long leon3_gptimer_irq; /* interrupt controller irq number, initialized by amba_init() */
+unsigned long leon3_gptimer_irq = 0; /* interrupt controller irq number, initialized by amba_init() */
+unsigned long leon3_gptimer_idx = 0; /* Timer Index (starting at 0) with Timer Core */
+ unsigned int sparc_leon_eirq;
+ #define LEON_IMASK ((&leon3_irqctrl_regs->mask[0]))
+ 
+@@ -109,6 +110,7 @@ void __init leon_init_timers(irq_handler
+ 	struct property *pp;
+ 	int len;
+ 	int cpu, icsel;
+	int ampopts;
+ 
+ 	leondebug_irq_disable = 0;
+ 	leon_debug_irqout = 0;
+@@ -124,24 +126,35 @@ void __init leon_init_timers(irq_handler
+ 	}
+ 
+ 	/* Find GPTIMER Timer Registers base address otherwise bail out. */
+-	if (rootnp && (np=of_find_node_by_name(rootnp, "GAISLER_GPTIMER"))) {
+	np = rootnp;
+	while (np && (np=of_find_node_by_name(np, "GAISLER_GPTIMER"))) {
+		ampopts = 0;
+		pp = of_find_property(np, "ampopts", &len);
+		if ( pp && ((ampopts = *(int *)pp->value) == 0) ) {
+			/* Skip this instance, resource already allocated by other OS */
+			continue;
+		}
+		/* Select Timer-Instance on Timer Core. Default is zero */
+		leon3_gptimer_idx = ampopts & 0x7;
+
+ 		pp = of_find_property(np, "reg", &len);
+ 		if (pp)
+ 			leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)pp->value;
+ 		pp = of_find_property(np, "interrupts", &len);
+ 		if (pp)
+ 			leon3_gptimer_irq = *(unsigned int *)pp->value;
+		break;
+ 	}
+ 
+ 	if (leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq) {
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].val, 0);
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].rld,
+		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
+		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
+ 				      (((1000000 / 100) - 1)));
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl, 0);
+		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
+ 
+ #ifdef CONFIG_SMP
+ 		leon_percpu_timer_dev[0].start = (int)leon3_gptimer_regs;
+-		leon_percpu_timer_dev[0].irq = leon3_gptimer_irq+1;
+		leon_percpu_timer_dev[0].irq = leon3_gptimer_irq+1+leon3_gptimer_idx;
+ 
+ 		if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
+ 		      (1<<LEON3_GPTIMER_SEPIRQ))) {
+@@ -149,9 +162,9 @@ void __init leon_init_timers(irq_handler
+ 			BUG();
+ 		}
+ 
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].val, 0);
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].rld, (((1000000/100) - 1)));
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl, 0);
+		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].val, 0);
+		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld, (((1000000/100) - 1)));
+		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl, 0);
+ # endif
+ 
+ 		/* The IRQ controller may (if implemented) consist of multiple
+@@ -178,7 +191,7 @@ void __init leon_init_timers(irq_handler
+ 		BUG();
+ 	}
+ 
+-	irq = request_irq(leon3_gptimer_irq,
+	irq = request_irq(leon3_gptimer_irq+leon3_gptimer_idx,
+ 			  counter_fn,
+ 			  (IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL);
+ 
+@@ -210,13 +223,13 @@ void __init leon_init_timers(irq_handler
+ # endif
+ 
+ 	if (leon3_gptimer_regs) {
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl,
+		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
+ 				      LEON3_GPTIMER_EN |
+ 				      LEON3_GPTIMER_RL |
+ 				      LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
+ 
+ #ifdef CONFIG_SMP
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl,
+		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
+ 				      LEON3_GPTIMER_EN |
+ 				      LEON3_GPTIMER_RL |
+ 				      LEON3_GPTIMER_LD |
--- a/target/linux/leon/patches/008-hz_specific_timer_init.patch
+++ b/target/linux/leon/patches/008-hz_specific_timer_init.patch
@@ -0,0 +1,30 @@
+From e4d697dad4d43109f045a4f25cb1d706122045c0 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 22 Sep 2010 13:24:36 +0200
+Subject: [PATCH] SPARC/LEON: removed constant timer initialization as if HZ=100, now it reflects the value of HZ
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ arch/sparc/kernel/leon_kernel.c |    4 ++--
+ 1 files changed, 2 insertions(+), 2 deletions(-)
+
+--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
+@@ -149,7 +149,7 @@ void __init leon_init_timers(irq_handler
+ 	if (leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq) {
+ 		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
+ 		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
+-				      (((1000000 / 100) - 1)));
+				      (((1000000 / HZ) - 1)));
+ 		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
+ 
+ #ifdef CONFIG_SMP
+@@ -163,7 +163,7 @@ void __init leon_init_timers(irq_handler
+ 		}
+ 
+ 		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].val, 0);
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld, (((1000000/100) - 1)));
+		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld, (((1000000 / HZ) - 1)));
+ 		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl, 0);
+ # endif
+ 
--- a/target/linux/leon/patches/009-remove_second_timer.patch
+++ b/target/linux/leon/patches/009-remove_second_timer.patch
@@ -0,0 +1,187 @@
+From 300f3ee36c3019ee36f81befd91cd1b32544cefe Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 22 Sep 2010 15:39:05 +0200
+Subject: [PATCH] SPARC/LEON: Removed the need for two timers, per-cpu ticker is shared with system clock timer.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ arch/sparc/include/asm/leon.h      |    2 +-
+ arch/sparc/include/asm/leon_amba.h |    3 +-
+ arch/sparc/kernel/entry.S          |    3 +-
+ arch/sparc/kernel/leon_kernel.c    |   37 ++++++++---------------------------
+ arch/sparc/kernel/leon_smp.c       |    8 ++++++-
+ 5 files changed, 21 insertions(+), 32 deletions(-)
+
+--- a/arch/sparc/include/asm/leon.h
+++ b/arch/sparc/include/asm/leon.h
+@@ -240,7 +240,7 @@ static inline int sparc_leon3_cpuid(void
+ 
+ #ifdef CONFIG_SMP
+ # define LEON3_IRQ_RESCHEDULE		13
+-# define LEON3_IRQ_TICKER		(leon_percpu_timer_dev[0].irq)
+# define LEON3_IRQ_TICKER		(leon3_gptimer_irq + leon3_gptimer_idx)
+ # define LEON3_IRQ_CROSS_CALL		15
+ #endif
+ 
+--- a/arch/sparc/include/asm/leon_amba.h
+++ b/arch/sparc/include/asm/leon_amba.h
+@@ -182,11 +182,12 @@ void _amba_init(struct device_node *dp,
+ 
+ extern struct leon3_irqctrl_regs_map *leon3_irqctrl_regs;
+ extern struct leon3_gptimer_regs_map *leon3_gptimer_regs;
+-extern struct amba_apb_device leon_percpu_timer_dev[16];
+ extern int leondebug_irq_disable;
+ extern int leon_debug_irqout;
+ extern unsigned long leon3_gptimer_irq;
+extern unsigned long leon3_gptimer_idx; /* Timer Index (starting at 0) with Timer Core */
+ extern unsigned int sparc_leon_eirq;
+extern unsigned long leon3_cpu_idx;
+ 
+ #endif /* __ASSEMBLY__ */
+ 
+--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
+@@ -411,8 +411,9 @@ smpleon_ticker:
+ 	WRITE_PAUSE
+ 	wr	%g2, PSR_ET, %psr
+ 	WRITE_PAUSE
+	mov	%l7, %o0		! irq level
+ 	call	leon_percpu_timer_interrupt
+-	 add	%sp, STACKFRAME_SZ, %o0
+	 add	%sp, STACKFRAME_SZ, %o1 ! pt_regs
+ 	wr	%l0, PSR_ET, %psr
+ 	WRITE_PAUSE
+ 	RESTORE_ALL
+--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
+@@ -25,7 +25,6 @@
+ 
+ struct leon3_irqctrl_regs_map *leon3_irqctrl_regs = NULL; /* interrupt controller base address, initialized by amba_init() */
+ struct leon3_gptimer_regs_map *leon3_gptimer_regs = NULL; /* timer controller base address, initialized by amba_init() */
+-struct amba_apb_device leon_percpu_timer_dev[16];
+ 
+ int leondebug_irq_disable;
+ int leon_debug_irqout;
+@@ -34,6 +33,7 @@ static int dummy_master_l10_counter;
+ unsigned long leon3_gptimer_irq = 0; /* interrupt controller irq number, initialized by amba_init() */
+ unsigned long leon3_gptimer_idx = 0; /* Timer Index (starting at 0) with Timer Core */
+ unsigned int sparc_leon_eirq;
+unsigned long leon3_cpu_idx = 0; /* Boot CPU Index */
+ #define LEON_IMASK ((&leon3_irqctrl_regs->mask[0]))
+ 
+ /* Return the IRQ of the pending IRQ on the extended IRQ controller */
+@@ -109,13 +109,14 @@ void __init leon_init_timers(irq_handler
+ 	struct device_node *rootnp, *np;
+ 	struct property *pp;
+ 	int len;
+-	int cpu, icsel;
+	int icsel;
+ 	int ampopts;
+ 
+ 	leondebug_irq_disable = 0;
+ 	leon_debug_irqout = 0;
+ 	master_l10_counter = (unsigned int *)&dummy_master_l10_counter;
+ 	dummy_master_l10_counter = 0;
+	leon3_cpu_idx = sparc_leon3_cpuid();
+ 
+ 	/* Find IRQMP IRQ Controller Registers base address otherwise bail out. */
+ 	rootnp = of_find_node_by_path("/ambapp0");
+@@ -152,21 +153,11 @@ void __init leon_init_timers(irq_handler
+ 				      (((1000000 / HZ) - 1)));
+ 		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
+ 
+-#ifdef CONFIG_SMP
+-		leon_percpu_timer_dev[0].start = (int)leon3_gptimer_regs;
+-		leon_percpu_timer_dev[0].irq = leon3_gptimer_irq+1+leon3_gptimer_idx;
+-
+ 		if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
+ 		      (1<<LEON3_GPTIMER_SEPIRQ))) {
+-			prom_printf("irq timer not configured with separate irqs\n");
+-			BUG();
+			prom_printf("LEON-SMP: GPTIMER use shared irqs, using other timers will fail.\n");
+ 		}
+ 
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].val, 0);
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld, (((1000000 / HZ) - 1)));
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl, 0);
+-# endif
+-
+ 		/* The IRQ controller may (if implemented) consist of multiple
+ 		 * IRQ controllers, each mapped on a 4Kb boundary.
+ 		 * Each CPU may be routed to different IRQCTRLs, however
+@@ -175,9 +166,8 @@ void __init leon_init_timers(irq_handler
+ 		 * accessed anyway.
+ 		 * In AMP systems, Linux may not be run on CPU0.
+ 		 */
+-		cpu = sparc_leon3_cpuid();
+-		icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[cpu/8]);
+-		icsel = (icsel >> ((7 - (cpu&0x7)) * 4)) & 0xf;
+		icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[leon3_cpu_idx/8]);
+		icsel = (icsel >> ((7 - (leon3_cpu_idx & 0x7)) * 4)) & 0xf;
+ 		leon3_irqctrl_regs += icsel;
+ 
+ 		LEON3_BYPASS_STORE_PA(&(leon3_irqctrl_regs->mask[0]), 0);
+@@ -204,7 +194,8 @@ void __init leon_init_timers(irq_handler
+ # ifdef CONFIG_SMP
+ 	{
+ 		unsigned long flags;
+-		struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (leon_percpu_timer_dev[0].irq - 1)];
+		struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + 
+						(leon3_gptimer_irq + leon3_gptimer_idx - 1)];
+ 
+ 		/* For SMP we use the level 14 ticker, however the bootup code
+ 		 * has copied the firmwares level 14 vector into boot cpu's
+@@ -222,21 +213,11 @@ void __init leon_init_timers(irq_handler
+ 	}
+ # endif
+ 
+-	if (leon3_gptimer_regs) {
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
+	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
+ 				      LEON3_GPTIMER_EN |
+ 				      LEON3_GPTIMER_RL |
+ 				      LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
+ 
+-#ifdef CONFIG_SMP
+-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
+-				      LEON3_GPTIMER_EN |
+-				      LEON3_GPTIMER_RL |
+-				      LEON3_GPTIMER_LD |
+-				      LEON3_GPTIMER_IRQEN);
+-#endif
+-
+-	}
+ }
+ 
+ void leon_clear_clock_irq(void)
+--- a/arch/sparc/kernel/leon_smp.c
+++ b/arch/sparc/kernel/leon_smp.c
+@@ -52,6 +52,7 @@ extern volatile unsigned long cpu_callin
+ extern unsigned char boot_cpu_id;
+ extern cpumask_t smp_commenced_mask;
+ void __init leon_configure_cache_smp(void);
+extern void handler_irq(int irq, struct pt_regs * regs);
+ 
+ static inline unsigned long do_swap(volatile unsigned long *ptr,
+ 				    unsigned long val)
+@@ -385,7 +386,7 @@ void leon_cross_call_irq(void)
+ 	ccall_info.processors_out[i] = 1;
+ }
+ 
+-void leon_percpu_timer_interrupt(struct pt_regs *regs)
+void leon_percpu_timer_interrupt(int irq, struct pt_regs *regs)
+ {
+ 	struct pt_regs *old_regs;
+ 	int cpu = smp_processor_id();
+@@ -406,6 +407,11 @@ void leon_percpu_timer_interrupt(struct
+ 		prof_counter(cpu) = prof_multiplier(cpu);
+ 	}
+ 	set_irq_regs(old_regs);
+
+	if ( cpu == leon3_cpu_idx ) {
+		/* Ticker Clock is shared with the System Clock */
+		handler_irq(irq, regs);
+	}
+ }
+ 
+ static void __init smp_setup_percpu_timer(void)
--- a/target/linux/leon/patches/010-apbuart_ampopts.patch
+++ b/target/linux/leon/patches/010-apbuart_ampopts.patch
@@ -0,0 +1,41 @@
+From 8129fa5437f3fe5f95bac180a43cd5a856cebdf3 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 20 Oct 2010 17:00:41 +0200
+Subject: [PATCH] Added support for ampopts in APBUART driver. Used in AMP systems.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/serial/apbuart.c |    5 ++++-
+ 1 files changed, 4 insertions(+), 1 deletions(-)
+
+--- a/drivers/serial/apbuart.c
+++ b/drivers/serial/apbuart.c
+@@ -26,6 +26,7 @@
+ #include <linux/of.h>
+ #include <linux/of_device.h>
+ #include <linux/of_platform.h>
+#include <linux/of_irq.h>
+ #include <linux/platform_device.h>
+ #include <linux/io.h>
+ #include <linux/serial_core.h>
+@@ -573,7 +574,6 @@ static int __devinit apbuart_probe(struc
+ 	printk(KERN_INFO "grlib-apbuart at 0x%llx, irq %d\n",
+ 	       (unsigned long long) port->mapbase, port->irq);
+ 	return 0;
+-
+ }
+ 
+ static struct of_device_id __initdata apbuart_match[] = {
+@@ -620,9 +620,12 @@ static void grlib_apbuart_configure(void
+ 		int *vendor = (int *) of_get_property(np, "vendor", NULL);
+ 		int *device = (int *) of_get_property(np, "device", NULL);
+ 		int *irqs = (int *) of_get_property(np, "interrupts", NULL);
+		int *ampopts = (int *) of_get_property(np, "ampopts", NULL);
+ 		regs = (struct amba_prom_registers *)
+ 		    of_get_property(np, "reg", NULL);
+ 
+		if (ampopts && (*ampopts == 0))
+			continue; /* Ignore if used by another OS instance */
+ 		if (vendor)
+ 			v = *vendor;
+ 		if (device)
--- a/target/linux/leon/patches/011-greth_fix_unhandled_irq.patch
+++ b/target/linux/leon/patches/011-greth_fix_unhandled_irq.patch
@@ -0,0 +1,21 @@
+From 3d7788e8f5ae3d44e48f9b7476528acf3d9c8b32 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 20 Oct 2010 17:07:12 +0200
+Subject: [PATCH] GRETH: Fixed potential future problem where unhandled IRQ is cleared.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/net/greth.c |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -584,7 +584,7 @@ static irqreturn_t greth_interrupt(int i
+ 	if (status & (GRETH_INT_RX | GRETH_INT_TX)) {
+ 
+ 		/* Clear interrupt status */
+-		GRETH_REGORIN(greth->regs->status,
+		GRETH_REGSAVE(greth->regs->status,
+ 			      status & (GRETH_INT_RX | GRETH_INT_TX));
+ 
+ 		retval = IRQ_HANDLED;
--- a/target/linux/leon/patches/012-greth_amba_vendor_device.patch
+++ b/target/linux/leon/patches/012-greth_amba_vendor_device.patch
@@ -0,0 +1,22 @@
+From ff5f2ee8b37f2278dd86946761313c3664c51836 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Thu, 21 Oct 2010 14:34:48 +0200
+Subject: [PATCH] GRETH: added raw AMBA vendor/device number to match against.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/net/greth.c |    3 +++
+ 1 files changed, 3 insertions(+), 0 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -1600,6 +1600,9 @@ static struct of_device_id greth_of_matc
+ 	{
+ 	 .name = "GAISLER_ETHMAC",
+ 	 },
+	{
+	 .name = "01_01d",
+	 },
+ 	{},
+ };
+ 
--- a/target/linux/leon/patches/013-apbuart_amba_vendor_device.patch
+++ b/target/linux/leon/patches/013-apbuart_amba_vendor_device.patch
@@ -0,0 +1,22 @@
+From 1c14b8995c1b8212180b5009dc04ac222a449ecb Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Thu, 21 Oct 2010 14:35:09 +0200
+Subject: [PATCH] APBUART: added raw AMBA vendor/device number to match against.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/serial/apbuart.c |    3 +++
+ 1 files changed, 3 insertions(+), 0 deletions(-)
+
+--- a/drivers/serial/apbuart.c
+++ b/drivers/serial/apbuart.c
+@@ -580,6 +580,9 @@ static struct of_device_id __initdata ap
+ 	{
+ 	 .name = "GAISLER_APBUART",
+ 	 },
+	{
+	 .name = "01_00c",
+	 },
+ 	{},
+ };
+ 
--- a/target/linux/leon/patches/014-timer_irqctrl_amba_vendor_device.patch
+++ b/target/linux/leon/patches/014-timer_irqctrl_amba_vendor_device.patch
@@ -0,0 +1,32 @@
+From 12782c44d0c687b5b0400a8224a9b1bf9eb9a428 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Tue, 26 Oct 2010 09:59:05 +0200
+Subject: [PATCH] TIMER,IRQCTRL: added raw AMBA vendor/device number to match against.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ arch/sparc/kernel/leon_kernel.c |    6 ++++--
+ 1 files changed, 4 insertions(+), 2 deletions(-)
+
+--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
+@@ -120,7 +120,8 @@ void __init leon_init_timers(irq_handler
+ 
+ 	/* Find IRQMP IRQ Controller Registers base address otherwise bail out. */
+ 	rootnp = of_find_node_by_path("/ambapp0");
+-	if (rootnp && (np=of_find_node_by_name(rootnp, "GAISLER_IRQMP"))) {
+	if (rootnp && ((np=of_find_node_by_name(rootnp, "GAISLER_IRQMP")) ||
+			(np=of_find_node_by_name(rootnp, "01_00d")))) {
+ 		pp = of_find_property(np, "reg", &len);
+ 		if (pp)
+ 			leon3_irqctrl_regs = *(struct leon3_irqctrl_regs_map **)pp->value;
+@@ -128,7 +129,8 @@ void __init leon_init_timers(irq_handler
+ 
+ 	/* Find GPTIMER Timer Registers base address otherwise bail out. */
+ 	np = rootnp;
+-	while (np && (np=of_find_node_by_name(np, "GAISLER_GPTIMER"))) {
+	while (np && ((np=of_find_node_by_name(np, "GAISLER_GPTIMER")) ||
+			(np=of_find_node_by_name(np, "01_011")))) {
+ 		ampopts = 0;
+ 		pp = of_find_property(np, "ampopts", &len);
+ 		if ( pp && ((ampopts = *(int *)pp->value) == 0) ) {
--- a/target/linux/leon/patches/015-dma_ops.patch
+++ b/target/linux/leon/patches/015-dma_ops.patch
@@ -0,0 +1,296 @@
+From c6d8f92cfd7f4f19eb3b16545b3b68c561978fe8 Mon Sep 17 00:00:00 2001
+From: Kristoffer Glembo <kristoffer@gaisler.com>
+Date: Mon, 7 Jun 2010 14:00:30 +0200
+Subject: [PATCH] sparc32: Added LEON dma_ops.
+
+Added leon3_dma_ops and mmu_inval_dma_area.
+---
+ arch/sparc/kernel/ioport.c |  139 +++++++++++++++++++++++++++++++------------
+ 1 files changed, 100 insertions(+), 39 deletions(-)
+
+--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
+@@ -50,10 +50,15 @@
+ #include <asm/io-unit.h>
+ #include <asm/leon.h>
+ 
+-#ifdef CONFIG_SPARC_LEON
+-#define mmu_inval_dma_area(p, l) leon_flush_dcache_all()
+-#else
+#ifndef CONFIG_SPARC_LEON
+ #define mmu_inval_dma_area(p, l)	/* Anton pulled it out for 2.4.0-xx */
+#else
+static inline void mmu_inval_dma_area(unsigned long va, unsigned long len)
+{
+	if (!sparc_leon3_snooping_enabled()) {
+		leon_flush_dcache_all();
+	}
+}
+ #endif
+ 
+ static struct resource *_sparc_find_resource(struct resource *r,
+@@ -254,7 +259,7 @@ static void *sbus_alloc_coherent(struct
+ 				 dma_addr_t *dma_addrp, gfp_t gfp)
+ {
+ 	struct platform_device *op = to_platform_device(dev);
+-	unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
+	unsigned long len_total = PAGE_ALIGN(len);
+ 	unsigned long va;
+ 	struct resource *res;
+ 	int order;
+@@ -287,15 +292,19 @@ static void *sbus_alloc_coherent(struct
+ 	 * XXX That's where sdev would be used. Currently we load
+ 	 * all iommu tables with the same translations.
+ 	 */
+-	if (mmu_map_dma_area(dev, dma_addrp, va, res->start, len_total) != 0)
+-		goto err_noiommu;
+-
+-	res->name = op->dev.of_node->name;
+#ifdef CONFIG_SPARC_LEON
+	sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);	
+	*dma_addrp = virt_to_phys(va);
+#else
+	if (mmu_map_dma_area(dev, dma_addrp, va, res->start, len_total) != 0) {
+		release_resource(res);
+		goto err_nova;
+	}
+#endif
+	res->name = op->node->name;
+ 
+ 	return (void *)(unsigned long)res->start;
+ 
+-err_noiommu:
+-	release_resource(res);
+ err_nova:
+ 	free_pages(va, order);
+ err_nomem:
+@@ -321,7 +330,7 @@ static void sbus_free_coherent(struct de
+ 		return;
+ 	}
+ 
+-	n = (n + PAGE_SIZE-1) & PAGE_MASK;
+	n = PAGE_ALIGN(n);
+ 	if ((res->end-res->start)+1 != n) {
+ 		printk("sbus_free_consistent: region 0x%lx asked 0x%zx\n",
+ 		    (long)((res->end-res->start)+1), n);
+@@ -333,7 +342,12 @@ static void sbus_free_coherent(struct de
+ 
+ 	/* mmu_inval_dma_area(va, n); */ /* it's consistent, isn't it */
+ 	pgv = virt_to_page(p);
+-	mmu_unmap_dma_area(dev, ba, n);
+
+#ifdef CONFIG_SPARC_LEON
+	sparc_unmapiorange((unsigned long)p, n);
+#else
+ 	mmu_unmap_dma_area(dev, ba, n);
+#endif
+ 
+ 	__free_pages(pgv, get_order(n));
+ }
+@@ -408,9 +422,6 @@ struct dma_map_ops sbus_dma_ops = {
+ 	.sync_sg_for_device	= sbus_sync_sg_for_device,
+ };
+ 
+-struct dma_map_ops *dma_ops = &sbus_dma_ops;
+-EXPORT_SYMBOL(dma_ops);
+-
+ static int __init sparc_register_ioport(void)
+ {
+ 	register_proc_sparc_ioport();
+@@ -422,7 +433,7 @@ arch_initcall(sparc_register_ioport);
+ 
+ #endif /* CONFIG_SBUS */
+ 
+-#ifdef CONFIG_PCI
+#if defined(CONFIG_PCI) || defined(CONFIG_SPARC_LEON)
+ 
+ /* Allocate and map kernel buffer using consistent mode DMA for a device.
+  * hwdev should be valid struct pci_dev pointer for PCI devices.
+@@ -430,7 +441,7 @@ arch_initcall(sparc_register_ioport);
+ static void *pci32_alloc_coherent(struct device *dev, size_t len,
+ 				  dma_addr_t *pba, gfp_t gfp)
+ {
+-	unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
+	unsigned long len_total = PAGE_ALIGN(len);
+ 	unsigned long va;
+ 	struct resource *res;
+ 	int order;
+@@ -463,10 +474,6 @@ static void *pci32_alloc_coherent(struct
+ 		return NULL;
+ 	}
+ 	mmu_inval_dma_area(va, len_total);
+-#if 0
+-/* P3 */ printk("pci_alloc_consistent: kva %lx uncva %lx phys %lx size %lx\n",
+-  (long)va, (long)res->start, (long)virt_to_phys(va), len_total);
+-#endif
+ 	sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);
+ 
+ 	*pba = virt_to_phys(va); /* equals virt_to_bus (R.I.P.) for us. */
+@@ -498,7 +505,7 @@ static void pci32_free_coherent(struct d
+ 		return;
+ 	}
+ 
+-	n = (n + PAGE_SIZE-1) & PAGE_MASK;
+	n = PAGE_ALIGN(n);
+ 	if ((res->end-res->start)+1 != n) {
+ 		printk("pci_free_consistent: region 0x%lx asked 0x%lx\n",
+ 		    (long)((res->end-res->start)+1), (long)n);
+@@ -515,6 +522,14 @@ static void pci32_free_coherent(struct d
+ 	free_pages(pgp, get_order(n));
+ }
+ 
+static void pci32_unmap_page(struct device *dev, dma_addr_t ba, size_t size,
+			     enum dma_data_direction dir, struct dma_attrs *attrs)
+{
+	if (dir != PCI_DMA_TODEVICE) {
+		mmu_inval_dma_area((unsigned long)phys_to_virt(ba), PAGE_ALIGN(size));
+	}
+}
+
+ /*
+  * Same as pci_map_single, but with pages.
+  */
+@@ -551,8 +566,7 @@ static int pci32_map_sg(struct device *d
+ 
+ 	/* IIep is write-through, not flushing. */
+ 	for_each_sg(sgl, sg, nents, n) {
+-		BUG_ON(page_address(sg_page(sg)) == NULL);
+-		sg->dma_address = virt_to_phys(sg_virt(sg));
+		sg->dma_address = sg_phys(sg);
+ 		sg->dma_length = sg->length;
+ 	}
+ 	return nents;
+@@ -571,10 +585,7 @@ static void pci32_unmap_sg(struct device
+ 
+ 	if (dir != PCI_DMA_TODEVICE) {
+ 		for_each_sg(sgl, sg, nents, n) {
+-			BUG_ON(page_address(sg_page(sg)) == NULL);
+-			mmu_inval_dma_area(
+-			    (unsigned long) page_address(sg_page(sg)),
+-			    (sg->length + PAGE_SIZE-1) & PAGE_MASK);
+			mmu_inval_dma_area((unsigned long)sg_virt(sg), PAGE_ALIGN(sg->length));
+ 		}
+ 	}
+ }
+@@ -594,7 +605,7 @@ static void pci32_sync_single_for_cpu(st
+ {
+ 	if (dir != PCI_DMA_TODEVICE) {
+ 		mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
+-		    (size + PAGE_SIZE-1) & PAGE_MASK);
+				   PAGE_ALIGN(size));
+ 	}
+ }
+ 
+@@ -621,10 +632,7 @@ static void pci32_sync_sg_for_cpu(struct
+ 
+ 	if (dir != PCI_DMA_TODEVICE) {
+ 		for_each_sg(sgl, sg, nents, n) {
+-			BUG_ON(page_address(sg_page(sg)) == NULL);
+-			mmu_inval_dma_area(
+-			    (unsigned long) page_address(sg_page(sg)),
+-			    (sg->length + PAGE_SIZE-1) & PAGE_MASK);
+			mmu_inval_dma_area((unsigned long)sg_virt(sg), PAGE_ALIGN(sg->length));
+ 		}
+ 	}
+ }
+@@ -637,18 +645,38 @@ static void pci32_sync_sg_for_device(str
+ 
+ 	if (dir != PCI_DMA_TODEVICE) {
+ 		for_each_sg(sgl, sg, nents, n) {
+-			BUG_ON(page_address(sg_page(sg)) == NULL);
+-			mmu_inval_dma_area(
+-			    (unsigned long) page_address(sg_page(sg)),
+-			    (sg->length + PAGE_SIZE-1) & PAGE_MASK);
+			mmu_inval_dma_area((unsigned long)sg_virt(sg),  PAGE_ALIGN(sg->length));
+ 		}
+ 	}
+ }
+ 
+/* LEON3 unmapping functions 
+ * 
+ * We can only invalidate the whole cache so unmap_page and unmap_sg do the same thing
+ */
+static void leon3_unmap_page(struct device *dev, dma_addr_t ba, size_t size,
+			     enum dma_data_direction dir, struct dma_attrs *attrs)
+{
+	if (dir != PCI_DMA_TODEVICE) {
+		mmu_inval_dma_area(0, 0);
+	}
+}
+
+static void leon3_unmap_sg(struct device *dev, struct scatterlist *sgl,
+			   int nents, enum dma_data_direction dir,
+			   struct dma_attrs *attrs)
+{
+
+	if (dir != PCI_DMA_TODEVICE) {
+		mmu_inval_dma_area(0, 0);
+	}
+}
+
+ struct dma_map_ops pci32_dma_ops = {
+ 	.alloc_coherent		= pci32_alloc_coherent,
+ 	.free_coherent		= pci32_free_coherent,
+ 	.map_page		= pci32_map_page,
+	.unmap_page		= pci32_unmap_page,
+ 	.map_sg			= pci32_map_sg,
+ 	.unmap_sg		= pci32_unmap_sg,
+ 	.sync_single_for_cpu	= pci32_sync_single_for_cpu,
+@@ -658,7 +686,30 @@ struct dma_map_ops pci32_dma_ops = {
+ };
+ EXPORT_SYMBOL(pci32_dma_ops);
+ 
+-#endif /* CONFIG_PCI */
+struct dma_map_ops leon3_dma_ops = {
+	.alloc_coherent		= sbus_alloc_coherent,
+	.free_coherent		= sbus_free_coherent,
+	.map_page		= pci32_map_page,
+	.unmap_page		= leon3_unmap_page,
+	.map_sg			= pci32_map_sg,
+	.unmap_sg		= leon3_unmap_sg,
+	.sync_single_for_cpu	= pci32_sync_single_for_cpu,
+	.sync_single_for_device	= pci32_sync_single_for_device,
+	.sync_sg_for_cpu	= pci32_sync_sg_for_cpu,
+	.sync_sg_for_device	= pci32_sync_sg_for_device,
+};
+
+#endif /* CONFIG_PCI || CONFIG_SPARC_LEON */
+
+#ifdef CONFIG_SPARC_LEON
+struct dma_map_ops *dma_ops = &leon3_dma_ops;
+#else
+struct dma_map_ops *dma_ops = &sbus_dma_ops;
+#endif
+
+#ifdef CONFIG_SBUS
+EXPORT_SYMBOL(dma_ops);
+#endif
+ 
+ /*
+  * Return whether the given PCI device DMA address mask can be
+@@ -676,6 +727,16 @@ int dma_supported(struct device *dev, u6
+ }
+ EXPORT_SYMBOL(dma_supported);
+ 
+int dma_set_mask(struct device *dev, u64 dma_mask)
+{
+#ifdef CONFIG_PCI
+	if (dev->bus == &pci_bus_type)
+		return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
+#endif
+	return -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(dma_set_mask);
+
+ #ifdef CONFIG_PROC_FS
+ 
+ static int sparc_io_proc_show(struct seq_file *m, void *v)
+@@ -717,7 +778,7 @@ static const struct file_operations spar
+ static struct resource *_sparc_find_resource(struct resource *root,
+ 					     unsigned long hit)
+ {
+-        struct resource *tmp;
+	struct resource *tmp;
+ 
+ 	for (tmp = root->child; tmp != 0; tmp = tmp->sibling) {
+ 		if (tmp->start <= hit && tmp->end >= hit)
--- a/target/linux/leon/patches/016-ioport_update.patch
+++ b/target/linux/leon/patches/016-ioport_update.patch
@@ -0,0 +1,51 @@
+From 36cad96a50eb877d0c5cb3d8d93c1807ad9c774c Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 1 Dec 2010 09:37:23 +0100
+Subject: [PATCH] Fix kristoffers ioport.c patch for more recent kernel.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ arch/sparc/include/asm/dma-mapping.h |   13 +------------
+ arch/sparc/kernel/ioport.c           |    3 ++-
+ 2 files changed, 3 insertions(+), 13 deletions(-)
+
+--- a/arch/sparc/include/asm/dma-mapping.h
+++ b/arch/sparc/include/asm/dma-mapping.h
+@@ -51,17 +51,6 @@ static inline int dma_mapping_error(stru
+ 	return (dma_addr == DMA_ERROR_CODE);
+ }
+ 
+-static inline int dma_set_mask(struct device *dev, u64 mask)
+-{
+-#ifdef CONFIG_PCI
+-	if (dev->bus == &pci_bus_type) {
+-		if (!dev->dma_mask || !dma_supported(dev, mask))
+-			return -EINVAL;
+-		*dev->dma_mask = mask;
+-		return 0;
+-	}
+-#endif
+-	return -EINVAL;
+-}
+extern int dma_set_mask(struct device *dev, u64 dma_mask);
+ 
+ #endif
+--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
+@@ -301,7 +301,7 @@ static void *sbus_alloc_coherent(struct
+ 		goto err_nova;
+ 	}
+ #endif
+-	res->name = op->node->name;
+	res->name = op->dev.of_node->name;
+ 
+ 	return (void *)(unsigned long)res->start;
+ 
+@@ -737,6 +737,7 @@ int dma_set_mask(struct device *dev, u64
+ }
+ EXPORT_SYMBOL(dma_set_mask);
+ 
+
+ #ifdef CONFIG_PROC_FS
+ 
+ static int sparc_io_proc_show(struct seq_file *m, void *v)
--- a/target/linux/leon/patches/017-greth_no_gbit.patch
+++ b/target/linux/leon/patches/017-greth_no_gbit.patch
@@ -0,0 +1,66 @@
+From 2e864d18c31d4e0255269f9e9cfccc09512676c6 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 1 Dec 2010 16:51:38 +0100
+Subject: [PATCH] GRETH: added greth_no_gbit option
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/net/greth.c |   15 +++++++++++++--
+ drivers/net/greth.h |    1 +
+ 2 files changed, 14 insertions(+), 2 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -66,6 +66,10 @@ static int greth_edcl = 1;
+ module_param(greth_edcl, int, 0);
+ MODULE_PARM_DESC(greth_edcl, "GRETH EDCL usage indicator. Set to 1 if EDCL is used.");
+ 
+static int no_gbit = 0;
+module_param(no_gbit, int, S_IRUGO);
+MODULE_PARM_DESC(no_gbit, "GRETH report GBit not supported by MAC enable. Only affects GRETH GBit MAC, default 0 (off).");
+
+ static int greth_open(struct net_device *dev);
+ static netdev_tx_t greth_start_xmit(struct sk_buff *skb,
+ 	   struct net_device *dev);
+@@ -1284,7 +1288,7 @@ static int greth_mdio_probe(struct net_d
+ 	}
+ 
+ 	ret = phy_connect_direct(dev, phy, &greth_link_change,
+-			0, greth->gbit_mac ?
+			0, greth->gbit_phy_support ?
+ 			PHY_INTERFACE_MODE_GMII :
+ 			PHY_INTERFACE_MODE_MII);
+ 	if (ret) {
+@@ -1293,7 +1297,7 @@ static int greth_mdio_probe(struct net_d
+ 		return ret;
+ 	}
+ 
+-	if (greth->gbit_mac)
+	if (greth->gbit_phy_support)
+ 		phy->supported &= PHY_GBIT_FEATURES;
+ 	else
+ 		phy->supported &= PHY_BASIC_FEATURES;
+@@ -1441,6 +1445,13 @@ static int __devinit greth_of_probe(stru
+ 	tmp = GRETH_REGLOAD(regs->control);
+ 	greth->gbit_mac = (tmp >> 27) & 1;
+ 
+	/* Let user skip GBit link mode by telling MDIO layer that MAC does
+	 * not support GBIT (for debug) */
+	if (greth->gbit_mac && !no_gbit)
+		greth->gbit_phy_support = 1;
+	else
+		greth->gbit_phy_support = 0;
+
+ 	/* Check for multicast capability */
+ 	greth->multicast = (tmp >> 25) & 1;
+ 
+--- a/drivers/net/greth.h
+++ b/drivers/net/greth.h
+@@ -138,6 +138,7 @@ struct greth_private {
+ 	u8 gbit_mac;
+ 	u8 mdio_int_en;
+ 	u8 edcl;
+	u8 gbit_phy_support;
+ };
+ 
+ #endif
--- a/target/linux/leon/patches/018-greth_compat_mode.patch
+++ b/target/linux/leon/patches/018-greth_compat_mode.patch
@@ -0,0 +1,41 @@
+From a498d7076ee0f82ec3f508293a9cf1ccba15829e Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 1 Dec 2010 16:52:19 +0100
+Subject: [PATCH] GRETH: added greth_compat_mode module parameter
+
+The greth_compat_mode option can be used to set a GRETH GBit capable MAC
+in operate as if the GRETH 10/100 device was found. The GRETH GBit supports
+TCP/UDP checksum offloading, unaligned frame buffers, scatter gather etc.
+Enabling this mode allows the developer to test the GRETH 10/100 device
+without all features mentioned above on a GBit MAC capable of the above.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/net/greth.c |    9 +++++++++
+ 1 files changed, 9 insertions(+), 0 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -70,6 +70,11 @@ static int no_gbit = 0;
+ module_param(no_gbit, int, S_IRUGO);
+ MODULE_PARM_DESC(no_gbit, "GRETH report GBit not supported by MAC enable. Only affects GRETH GBit MAC, default 0 (off).");
+ 
+/* Use this option to enable GRETH 10/100 code on GRETH_GBIT hardware (debug legacy code option) */
+static int compat_mode = 0;
+module_param(compat_mode, int, S_IRUGO);
+MODULE_PARM_DESC(compat_mode, "GRETH 10/100 legacy mode enable. Only affects GRETH GBit MAC, default 0 (off).");
+
+ static int greth_open(struct net_device *dev);
+ static netdev_tx_t greth_start_xmit(struct sk_buff *skb,
+ 	   struct net_device *dev);
+@@ -1452,6 +1457,10 @@ static int __devinit greth_of_probe(stru
+ 	else
+ 		greth->gbit_phy_support = 0;
+ 
+	/* Force GBit MAC in legacy 10/100 mode (no offloading etc.) */
+	if (compat_mode == 1)
+		greth->gbit_mac = 0;
+
+ 	/* Check for multicast capability */
+ 	greth->multicast = (tmp >> 25) & 1;
+ 
--- a/target/linux/leon/patches/019-greth_fix_open_close.patch
+++ b/target/linux/leon/patches/019-greth_fix_open_close.patch
@@ -0,0 +1,34 @@
+From 6216bc809c5bdd586b14d096fbaf6dc25574b928 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 1 Dec 2010 09:59:14 +0100
+Subject: [PATCH] GRETH: fix opening/closing
+
+When NAPI is disabled there is no point in having IRQs enabled, TX/RX
+should be off before clearing the TX/RX descriptor rings.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/net/greth.c |    4 ++++
+ 1 files changed, 4 insertions(+), 0 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -365,6 +365,8 @@ static int greth_open(struct net_device
+ 		dev_dbg(&dev->dev, " starting queue\n");
+ 	netif_start_queue(dev);
+ 
+	GRETH_REGSAVE(greth->regs->status, 0xFF);
+
+ 	napi_enable(&greth->napi);
+ 
+ 	greth_enable_irqs(greth);
+@@ -380,7 +382,9 @@ static int greth_close(struct net_device
+ 
+ 	napi_disable(&greth->napi);
+ 
+	greth_disable_irqs(greth);
+ 	greth_disable_tx(greth);
+	greth_disable_rx(greth);
+ 
+ 	netif_stop_queue(dev);
+ 
--- a/target/linux/leon/patches/020-greth_optimize_gbit_tx_descriptor_handling.patch
+++ b/target/linux/leon/patches/020-greth_optimize_gbit_tx_descriptor_handling.patch
@@ -0,0 +1,61 @@
+From 544631281bed5cc37b8f2d3a99f44c9d4b97f9a8 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 1 Dec 2010 10:07:12 +0100
+Subject: [PATCH] GRETH: GBit transmit descriptor handling optimization
+
+It is safe to enable all fragments before enabling the first descriptor,
+this way all descriptors don't have to be processed twice, added extra
+memory barrier.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/net/greth.c |   19 ++++++++++---------
+ 1 files changed, 10 insertions(+), 9 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -512,7 +512,7 @@ greth_start_xmit_gbit(struct sk_buff *sk
+ 		greth->tx_skbuff[curr_tx] = NULL;
+ 		bdp = greth->tx_bd_base + curr_tx;
+ 
+-		status = GRETH_TXBD_CSALL;
+		status = GRETH_TXBD_CSALL | GRETH_BD_EN;
+ 		status |= frag->size & GRETH_BD_LEN;
+ 
+ 		/* Wrap around descriptor ring */
+@@ -549,26 +549,27 @@ greth_start_xmit_gbit(struct sk_buff *sk
+ 
+ 	wmb();
+ 
+-	/* Enable the descriptors that we configured ...  */
+-	for (i = 0; i < nr_frags + 1; i++) {
+-		bdp = greth->tx_bd_base + greth->tx_next;
+-		greth_write_bd(&bdp->stat, greth_read_bd(&bdp->stat) | GRETH_BD_EN);
+-		greth->tx_next = NEXT_TX(greth->tx_next);
+-		greth->tx_free--;
+-	}
+	/* Enable the descriptor chain by enabling the first descriptor */
+	bdp = greth->tx_bd_base + greth->tx_next;
+	greth_write_bd(&bdp->stat, greth_read_bd(&bdp->stat) | GRETH_BD_EN);
+	greth->tx_next = curr_tx;
+	greth->tx_free -= nr_frags + 1;
+
+	wmb();
+ 
+ 	greth_enable_tx(greth);
+ 
+ 	return NETDEV_TX_OK;
+ 
+ frag_map_error:
+-	/* Unmap SKB mappings that succeeded */
+	/* Unmap SKB mappings that succeeded and disable descriptor */
+ 	for (i = 0; greth->tx_next + i != curr_tx; i++) {
+ 		bdp = greth->tx_bd_base + greth->tx_next + i;
+ 		dma_unmap_single(greth->dev,
+ 				 greth_read_bd(&bdp->addr),
+ 				 greth_read_bd(&bdp->stat) & GRETH_BD_LEN,
+ 				 DMA_TO_DEVICE);
+		greth_write_bd(&bdp->stat, 0);
+ 	}
+ map_error:
+ 	if (net_ratelimit())
--- a/target/linux/leon/patches/021-greth_fix_memory_leak.patch
+++ b/target/linux/leon/patches/021-greth_fix_memory_leak.patch
@@ -0,0 +1,49 @@
+From 54789a03adf9c924d0cf7b890323c9c1ca7ab042 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 1 Dec 2010 10:26:09 +0100
+Subject: [PATCH] GRETH: fixed skb buffer memory leak on frame errors
+
+A new SKB buffer should not be allocated when the old SKB is reused.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/net/greth.c |   17 +++++++++++------
+ 1 files changed, 11 insertions(+), 6 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -879,10 +879,8 @@ static int greth_rx_gbit(struct net_devi
+ 			}
+ 		}
+ 
+-		/* Allocate new skb to replace current */
+-		newskb = netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN);
+-
+-		if (!bad && newskb) {
+		/* Allocate new skb to replace current, not needed if the current skb can be reused */
+		if (!bad && (newskb=netdev_alloc_skb(dev, MAX_FRAME_SIZE + NET_IP_ALIGN))) {
+ 			skb_reserve(newskb, NET_IP_ALIGN);
+ 
+ 			dma_addr = dma_map_single(greth->dev,
+@@ -919,12 +917,19 @@ static int greth_rx_gbit(struct net_devi
+ 				if (net_ratelimit())
+ 					dev_warn(greth->dev, "Could not create DMA mapping, dropping packet\n");
+ 				dev_kfree_skb(newskb);
+-				dev->stats.rx_dropped++;
+				dev->stats.rx_dropped++; /* reusing current skb, so it is a drop */
+ 			}
+		} else if ( bad ) {
+			/* Bad Frame transfer, the skb is reused */
+			dev->stats.rx_dropped++;
+ 		} else {
+			/* Failed Allocating a new skb. This is rather stupid but the current "filled" 
+			 * skb is reused, as if transfer failure. One could argue that RX descriptor table
+			 * handling should be divided into cleaning and filling as the TX part of the driver
+			 */
+ 			if (net_ratelimit())
+ 				dev_warn(greth->dev, "Could not allocate SKB, dropping packet\n");
+-			dev->stats.rx_dropped++;
+			dev->stats.rx_dropped++; /* reusing current skb, so it is a drop */
+ 		}
+ 
+ 		status = GRETH_BD_EN | GRETH_BD_IE;
--- a/target/linux/leon/patches/022-greth_avoid_bad_speed_duplex.patch
+++ b/target/linux/leon/patches/022-greth_avoid_bad_speed_duplex.patch
@@ -0,0 +1,50 @@
+From c2e963057ca5635d6e5387623c3ad0c0b3123754 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 1 Dec 2010 10:28:37 +0100
+Subject: [PATCH] GRETH: avoid writing bad speed/duplex when setting transfer mode
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/net/greth.c |   19 ++++++++-----------
+ 1 files changed, 8 insertions(+), 11 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -1236,29 +1236,26 @@ static void greth_link_change(struct net
+ 	struct greth_private *greth = netdev_priv(dev);
+ 	struct phy_device *phydev = greth->phy;
+ 	unsigned long flags;
+-
+ 	int status_change = 0;
+	u32 ctrl;
+ 
+ 	spin_lock_irqsave(&greth->devlock, flags);
+ 
+ 	if (phydev->link) {
+ 
+ 		if ((greth->speed != phydev->speed) || (greth->duplex != phydev->duplex)) {
+-
+-			GRETH_REGANDIN(greth->regs->control,
+-				       ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB));
+			ctrl = GRETH_REGLOAD(greth->regs->control) & 
+			       ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB);
+ 
+ 			if (phydev->duplex)
+-				GRETH_REGORIN(greth->regs->control, GRETH_CTRL_FD);
+-
+-			if (phydev->speed == SPEED_100) {
+-
+-				GRETH_REGORIN(greth->regs->control, GRETH_CTRL_SP);
+-			}
+				ctrl |= GRETH_CTRL_FD;
+ 
+			if (phydev->speed == SPEED_100)
+				ctrl |= GRETH_CTRL_SP;
+ 			else if (phydev->speed == SPEED_1000)
+-				GRETH_REGORIN(greth->regs->control, GRETH_CTRL_GB);
+				ctrl |= GRETH_CTRL_GB;
+ 
+			GRETH_REGSAVE(greth->regs->control, ctrl);
+ 			greth->speed = phydev->speed;
+ 			greth->duplex = phydev->duplex;
+ 			status_change = 1;
--- a/target/linux/leon/patches/023-greth_handle_frame_error_interrupts.patch
+++ b/target/linux/leon/patches/023-greth_handle_frame_error_interrupts.patch
@@ -0,0 +1,49 @@
+From f62c047af910c9c9696db7b47472a3728b8100e8 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 1 Dec 2010 11:56:22 +0100
+Subject: [PATCH] GRETH: handle frame error interrupts
+
+Not handling frame error interrupts are unlikly but may lead to dead
+lock if 128 error frames are recieved in a row.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/net/greth.c |    5 +++--
+ drivers/net/greth.h |    2 ++
+ 2 files changed, 5 insertions(+), 2 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -595,11 +595,12 @@ static irqreturn_t greth_interrupt(int i
+ 	status = GRETH_REGLOAD(greth->regs->status);
+ 
+ 	/* Handle rx and tx interrupts through poll */
+-	if (status & (GRETH_INT_RX | GRETH_INT_TX)) {
+	if (status & (GRETH_INT_RE | GRETH_INT_RX | GRETH_INT_TE | GRETH_INT_TX)) {
+ 
+ 		/* Clear interrupt status */
+ 		GRETH_REGSAVE(greth->regs->status,
+-			      status & (GRETH_INT_RX | GRETH_INT_TX));
+			      status & (GRETH_INT_RE | GRETH_INT_RX | 
+					GRETH_INT_TE | GRETH_INT_TX));
+ 
+ 		retval = IRQ_HANDLED;
+ 
+--- a/drivers/net/greth.h
+++ b/drivers/net/greth.h
+@@ -23,6 +23,7 @@
+ #define GRETH_BD_LEN 0x7FF
+ 
+ #define GRETH_TXEN 0x1
+#define GRETH_INT_TE 0x2
+ #define GRETH_INT_TX 0x8
+ #define GRETH_TXI 0x4
+ #define GRETH_TXBD_STATUS 0x0001C000
+@@ -35,6 +36,7 @@
+ #define GRETH_TXBD_ERR_UE 0x4000
+ #define GRETH_TXBD_ERR_AL 0x8000
+ 
+#define GRETH_INT_RE         0x1
+ #define GRETH_INT_RX         0x4
+ #define GRETH_RXEN           0x2
+ #define GRETH_RXI            0x8
--- a/target/linux/leon/patches/024-greth_resolve_smp_and_other_issues.patch
+++ b/target/linux/leon/patches/024-greth_resolve_smp_and_other_issues.patch
@@ -0,0 +1,399 @@
+From 4439d933884ee3c7e320b8d33bd2e268dd5b6fa5 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 1 Dec 2010 11:40:19 +0100
+Subject: [PATCH] GRETH: resolve SMP issues and other problems
+
+Fixes the following:
+1. POLL should not enable IRQ when work is not completed
+2. No locking between TX descriptor cleaning and XMIT descriptor handling
+3. No locking between RX POLL and XMIT modifying control register
+4. Since TX cleaning (called from POLL) is running in parallel with XMIT
+   unnecessary locking is needed.
+5. IRQ handler looks at RX frame status solely, this is wrong when IRQ is
+   temporarily disabled (in POLL), and when IRQ is shared.
+6. IRQ handler clears IRQ status, which is unnecessary
+7. TX queue was stopped in preventing cause when not MAX_SKB_FRAGS+1 descriptors
+   were available after a SKB been scheduled by XMIT. Instead the TX queue is
+   stopped first when not enough descriptors are available upon entering XMIT.
+
+It was hard to split up this patch in smaller pieces since all are tied
+together somehow.
+
+Note the RX flag used in the interrupt handler does not signal that interrtupt
+was asserted, but that a frame was received. Same goes for TX. Also, IRQ is not
+asserted when the RX flag is set before enabling IRQ enable until a new frame is
+received. So extra care must be taken to avoid enabling IRQ and all descriptors
+are already used, hence dead lock will upon us. See new POLL implementation that
+enableds IRQ then look at the RX flag to determine if one or more IRQs may have
+been missed. TX/RX flags are cleared before handling previously enabled
+descriptors, this ensures that the RX/TX flags are valid when determining if IRQ
+should be turned on again.
+
+By moving TX cleaning from POLL to XMIT in the standard case, removes some
+locking trouble. Enabling TX cleaning from poll only when not enough TX
+descriptors are available is safe because the TX queue is at the same time
+stopped, thus XMIT will not be called. The TX queue is woken up again when
+enough descriptrs are available.
+
+TX Frames are always enabled with IRQ, however the TX IRQ Enable flag will not
+be enabled until XMIT must wait for free descriptors.
+
+Locking RX and XMIT parts of the driver from each other is needed because the
+RX/TX enable bits share the same register.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/net/greth.c |  158 ++++++++++++++++++++++++++++++---------------------
+ 1 files changed, 93 insertions(+), 65 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -1,7 +1,7 @@
+ /*
+  * Aeroflex Gaisler GRETH 10/100/1G Ethernet MAC.
+  *
+- * 2005-2009 (c) Aeroflex Gaisler AB
+ * 2005-2010 (c) Aeroflex Gaisler AB
+  *
+  * This driver supports GRETH 10/100 and GRETH 10/100/1G Ethernet MACs
+  * available in the GRLIB VHDL IP core library.
+@@ -401,12 +401,20 @@ greth_start_xmit(struct sk_buff *skb, st
+ 	struct greth_private *greth = netdev_priv(dev);
+ 	struct greth_bd *bdp;
+ 	int err = NETDEV_TX_OK;
+-	u32 status, dma_addr;
+	u32 status, dma_addr, ctrl;
+	unsigned long flags;
+ 
+-	bdp = greth->tx_bd_base + greth->tx_next;
+	/* Clean TX Ring */
+	greth_clean_tx(greth->netdev);
+ 
+ 	if (unlikely(greth->tx_free <= 0)) {
+		spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/
+		ctrl = GRETH_REGLOAD(greth->regs->control);
+		/* Enable TX IRQ only if not already in poll() routine */
+		if ( ctrl & GRETH_RXI )
+			GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_TXI);
+ 		netif_stop_queue(dev);
+		spin_unlock_irqrestore(&greth->devlock, flags);
+ 		return NETDEV_TX_BUSY;
+ 	}
+ 
+@@ -419,13 +427,14 @@ greth_start_xmit(struct sk_buff *skb, st
+ 		goto out;
+ 	}
+ 
+	bdp = greth->tx_bd_base + greth->tx_next;
+ 	dma_addr = greth_read_bd(&bdp->addr);
+ 
+ 	memcpy((unsigned char *) phys_to_virt(dma_addr), skb->data, skb->len);
+ 
+ 	dma_sync_single_for_device(greth->dev, dma_addr, skb->len, DMA_TO_DEVICE);
+ 
+-	status = GRETH_BD_EN | (skb->len & GRETH_BD_LEN);
+	status = GRETH_BD_EN | GRETH_BD_IE | (skb->len & GRETH_BD_LEN);
+ 
+ 	/* Wrap around descriptor ring */
+ 	if (greth->tx_next == GRETH_TXBD_NUM_MASK) {
+@@ -435,22 +444,11 @@ greth_start_xmit(struct sk_buff *skb, st
+ 	greth->tx_next = NEXT_TX(greth->tx_next);
+ 	greth->tx_free--;
+ 
+-	/* No more descriptors */
+-	if (unlikely(greth->tx_free == 0)) {
+-
+-		/* Free transmitted descriptors */
+-		greth_clean_tx(dev);
+-
+-		/* If nothing was cleaned, stop queue & wait for irq */
+-		if (unlikely(greth->tx_free == 0)) {
+-			status |= GRETH_BD_IE;
+-			netif_stop_queue(dev);
+-		}
+-	}
+-
+ 	/* Write descriptor control word and enable transmission */
+ 	greth_write_bd(&bdp->stat, status);
+	spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/
+ 	greth_enable_tx(greth);
+	spin_unlock_irqrestore(&greth->devlock, flags);
+ 
+ out:
+ 	dev_kfree_skb(skb);
+@@ -463,13 +461,24 @@ greth_start_xmit_gbit(struct sk_buff *sk
+ {
+ 	struct greth_private *greth = netdev_priv(dev);
+ 	struct greth_bd *bdp;
+-	u32 status = 0, dma_addr;
+	u32 status = 0, dma_addr, ctrl;
+ 	int curr_tx, nr_frags, i, err = NETDEV_TX_OK;
+	unsigned long flags;
+ 
+ 	nr_frags = skb_shinfo(skb)->nr_frags;
+ 
+	/* Clean TX Ring */
+	greth_clean_tx_gbit(dev);
+
+ 	if (greth->tx_free < nr_frags + 1) {
+		spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/
+		ctrl = GRETH_REGLOAD(greth->regs->control);
+		/* Enable TX IRQ only if not already in poll() routine */
+		if ( ctrl & GRETH_RXI ) {
+			GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_TXI);
+		}
+ 		netif_stop_queue(dev);
+		spin_unlock_irqrestore(&greth->devlock, flags);
+ 		err = NETDEV_TX_BUSY;
+ 		goto out;
+ 	}
+@@ -522,14 +531,8 @@ greth_start_xmit_gbit(struct sk_buff *sk
+ 		/* More fragments left */
+ 		if (i < nr_frags - 1)
+ 			status |= GRETH_TXBD_MORE;
+-
+-		/* ... last fragment, check if out of descriptors  */
+-		else if (greth->tx_free - nr_frags - 1 < (MAX_SKB_FRAGS + 1)) {
+-
+-			/* Enable interrupts and stop queue */
+-			status |= GRETH_BD_IE;
+-			netif_stop_queue(dev);
+-		}
+		else
+			status |= GRETH_BD_IE; /* enable IRQ on last fragment */
+ 
+ 		greth_write_bd(&bdp->stat, status);
+ 
+@@ -557,7 +560,9 @@ greth_start_xmit_gbit(struct sk_buff *sk
+ 
+ 	wmb();
+ 
+	spin_lock_irqsave(&greth->devlock, flags); /*save from poll/irq*/
+ 	greth_enable_tx(greth);
+	spin_unlock_irqrestore(&greth->devlock, flags);
+ 
+ 	return NETDEV_TX_OK;
+ 
+@@ -579,12 +584,11 @@ out:
+ 	return err;
+ }
+ 
+-
+ static irqreturn_t greth_interrupt(int irq, void *dev_id)
+ {
+ 	struct net_device *dev = dev_id;
+ 	struct greth_private *greth;
+-	u32 status;
+	u32 status, ctrl;
+ 	irqreturn_t retval = IRQ_NONE;
+ 
+ 	greth = netdev_priv(dev);
+@@ -594,13 +598,14 @@ static irqreturn_t greth_interrupt(int i
+ 	/* Get the interrupt events that caused us to be here. */
+ 	status = GRETH_REGLOAD(greth->regs->status);
+ 
+-	/* Handle rx and tx interrupts through poll */
+-	if (status & (GRETH_INT_RE | GRETH_INT_RX | GRETH_INT_TE | GRETH_INT_TX)) {
+	/* Must see if interrupts are enabled also, INT_TX|INT_RX flags may be set regardless
+	 * of whether IRQ is enabled or not. Especially important when shared IRQ.
+	 */
+	ctrl = GRETH_REGLOAD(greth->regs->control);
+ 
+-		/* Clear interrupt status */
+-		GRETH_REGSAVE(greth->regs->status,
+-			      status & (GRETH_INT_RE | GRETH_INT_RX | 
+-					GRETH_INT_TE | GRETH_INT_TX));
+	/* Handle rx and tx interrupts through poll */
+	if (((status & (GRETH_INT_RE | GRETH_INT_RX)) && (ctrl & GRETH_RXI)) ||
+	    ((status & (GRETH_INT_TE | GRETH_INT_TX)) && (ctrl & GRETH_TXI))) {
+ 
+ 		retval = IRQ_HANDLED;
+ 
+@@ -625,6 +630,8 @@ static void greth_clean_tx(struct net_de
+ 
+ 	while (1) {
+ 		bdp = greth->tx_bd_base + greth->tx_last;
+		GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX);
+		mb();
+ 		stat = greth_read_bd(&bdp->stat);
+ 
+ 		if (unlikely(stat & GRETH_BD_EN))
+@@ -685,7 +692,10 @@ static void greth_clean_tx_gbit(struct n
+ 
+ 		/* We only clean fully completed SKBs */
+ 		bdp_last_frag = greth->tx_bd_base + SKIP_TX(greth->tx_last, nr_frags);
+-		stat = bdp_last_frag->stat;
+
+		GRETH_REGSAVE(greth->regs->status, GRETH_INT_TE | GRETH_INT_TX);
+		mb();
+		stat = greth_read_bd(&bdp_last_frag->stat);
+ 
+ 		if (stat & GRETH_BD_EN)
+ 			break;
+@@ -717,23 +727,12 @@ static void greth_clean_tx_gbit(struct n
+ 		greth->tx_free += nr_frags+1;
+ 		dev_kfree_skb(skb);
+ 	}
+-	if (greth->tx_free > (MAX_SKB_FRAGS + 1)) {
+
+	if (netif_queue_stopped(dev) && (greth->tx_free > (MAX_SKB_FRAGS + 1))) {
+ 		netif_wake_queue(dev);
+ 	}
+ }
+ 
+-static int greth_pending_packets(struct greth_private *greth)
+-{
+-	struct greth_bd *bdp;
+-	u32 status;
+-	bdp = greth->rx_bd_base + greth->rx_cur;
+-	status = greth_read_bd(&bdp->stat);
+-	if (status & GRETH_BD_EN)
+-		return 0;
+-	else
+-		return 1;
+-}
+-
+ static int greth_rx(struct net_device *dev, int limit)
+ {
+ 	struct greth_private *greth;
+@@ -742,20 +741,24 @@ static int greth_rx(struct net_device *d
+ 	int pkt_len;
+ 	int bad, count;
+ 	u32 status, dma_addr;
+	unsigned long flags;
+ 
+ 	greth = netdev_priv(dev);
+ 
+ 	for (count = 0; count < limit; ++count) {
+ 
+ 		bdp = greth->rx_bd_base + greth->rx_cur;
+		GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX);
+		mb();
+ 		status = greth_read_bd(&bdp->stat);
+-		dma_addr = greth_read_bd(&bdp->addr);
+-		bad = 0;
+ 
+ 		if (unlikely(status & GRETH_BD_EN)) {
+ 			break;
+ 		}
+ 
+		dma_addr = greth_read_bd(&bdp->addr);
+		bad = 0;
+
+ 		/* Check status for errors. */
+ 		if (unlikely(status & GRETH_RXBD_STATUS)) {
+ 			if (status & GRETH_RXBD_ERR_FT) {
+@@ -817,7 +820,9 @@ static int greth_rx(struct net_device *d
+ 
+ 		dma_sync_single_for_device(greth->dev, dma_addr, MAX_FRAME_SIZE, DMA_FROM_DEVICE);
+ 
+		spin_lock_irqsave(&greth->devlock, flags); /* save from XMIT */
+ 		greth_enable_rx(greth);
+		spin_unlock_irqrestore(&greth->devlock, flags);
+ 
+ 		greth->rx_cur = NEXT_RX(greth->rx_cur);
+ 	}
+@@ -851,6 +856,7 @@ static int greth_rx_gbit(struct net_devi
+ 	int pkt_len;
+ 	int bad, count = 0;
+ 	u32 status, dma_addr;
+	unsigned long flags;
+ 
+ 	greth = netdev_priv(dev);
+ 
+@@ -858,6 +864,8 @@ static int greth_rx_gbit(struct net_devi
+ 
+ 		bdp = greth->rx_bd_base + greth->rx_cur;
+ 		skb = greth->rx_skbuff[greth->rx_cur];
+		GRETH_REGSAVE(greth->regs->status, GRETH_INT_RE | GRETH_INT_RX);
+		mb();
+ 		status = greth_read_bd(&bdp->stat);
+ 		bad = 0;
+ 
+@@ -940,7 +948,9 @@ static int greth_rx_gbit(struct net_devi
+ 
+ 		wmb();
+ 		greth_write_bd(&bdp->stat, status);
+		spin_lock_irqsave(&greth->devlock, flags);
+ 		greth_enable_rx(greth);
+		spin_unlock_irqrestore(&greth->devlock, flags);
+ 		greth->rx_cur = NEXT_RX(greth->rx_cur);
+ 	}
+ 
+@@ -952,15 +962,19 @@ static int greth_poll(struct napi_struct
+ {
+ 	struct greth_private *greth;
+ 	int work_done = 0;
+	unsigned long flags;
+	u32 mask, ctrl;
+ 	greth = container_of(napi, struct greth_private, napi);
+ 
+-	if (greth->gbit_mac) {
+-		greth_clean_tx_gbit(greth->netdev);
+-	} else {
+-		greth_clean_tx(greth->netdev);
+restart_txrx_poll:
+	if ( netif_queue_stopped(greth->netdev) ) {
+		if (greth->gbit_mac) {
+			greth_clean_tx_gbit(greth->netdev);
+		} else {
+			greth_clean_tx(greth->netdev);
+		}
+ 	}
+ 
+-restart_poll:
+ 	if (greth->gbit_mac) {
+ 		work_done += greth_rx_gbit(greth->netdev, budget - work_done);
+ 	} else {
+@@ -969,15 +983,29 @@ restart_poll:
+ 
+ 	if (work_done < budget) {
+ 
+-		napi_complete(napi);
+		spin_lock_irqsave(&greth->devlock, flags);
+ 
+-		if (greth_pending_packets(greth)) {
+-			napi_reschedule(napi);
+-			goto restart_poll;
+		ctrl = GRETH_REGLOAD(greth->regs->control);
+		if (netif_queue_stopped(greth->netdev)) {
+			GRETH_REGSAVE(greth->regs->control,
+					ctrl | GRETH_TXI | GRETH_RXI);
+			mask = GRETH_INT_RX | GRETH_INT_RE |
+			       GRETH_INT_TX | GRETH_INT_TE;
+		} else {
+			GRETH_REGSAVE(greth->regs->control, ctrl | GRETH_RXI);
+			mask = GRETH_INT_RX | GRETH_INT_RE;
+		}
+
+		if (GRETH_REGLOAD(greth->regs->status) & mask) {
+			GRETH_REGSAVE(greth->regs->control, ctrl);
+			spin_unlock_irqrestore(&greth->devlock, flags);
+			goto restart_txrx_poll;
+		} else {
+			__napi_complete(napi);
+			spin_unlock_irqrestore(&greth->devlock, flags);
+ 		}
+ 	}
+ 
+-	greth_enable_irqs(greth);
+ 	return work_done;
+ }
+ 
+@@ -1172,11 +1200,11 @@ static const struct ethtool_ops greth_et
+ };
+ 
+ static struct net_device_ops greth_netdev_ops = {
+-	.ndo_open = greth_open,
+-	.ndo_stop = greth_close,
+-	.ndo_start_xmit = greth_start_xmit,
+-	.ndo_set_mac_address = greth_set_mac_add,
+-	.ndo_validate_addr 	= eth_validate_addr,
+	.ndo_open		= greth_open,
+	.ndo_stop		= greth_close,
+	.ndo_start_xmit		= greth_start_xmit,
+	.ndo_set_mac_address	= greth_set_mac_add,
+	.ndo_validate_addr	= eth_validate_addr,
+ };
+ 
+ static inline int wait_for_mdio(struct greth_private *greth)
--- a/target/linux/leon/patches/025-greth_bootloader_disable_device_node.patch
+++ b/target/linux/leon/patches/025-greth_bootloader_disable_device_node.patch
@@ -0,0 +1,25 @@
+From 66d5b37cc6d32291419bf99161e83e2946ea5f25 Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 1 Dec 2010 12:11:03 +0100
+Subject: [PATCH] GRETH: added option to disable a device node from bootloader.
+
+Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
+---
+ drivers/net/greth.c |    6 ++++++
+ 1 files changed, 6 insertions(+), 0 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -1428,6 +1428,12 @@ static int __devinit greth_of_probe(stru
+ 	int err;
+ 	int tmp;
+ 	unsigned long timeout;
+	int *ampopts;
+
+	/* Skip device if used by another OS instance */
+	ampopts = (int *) of_get_property(ofdev->dev.of_node, "ampopts", NULL);
+	if (ampopts && (*ampopts == 0))
+		return -EIO;
+ 
+ 	dev = alloc_etherdev(sizeof(struct greth_private));
+ 
--- a/target/linux/leon/patches/026-greth_gbit_mac_set_ee_when_edcl.patch
+++ b/target/linux/leon/patches/026-greth_gbit_mac_set_ee_when_edcl.patch
@@ -0,0 +1,31 @@
+From 50fcb51c42bc721f18f1bfa10f705519cd344a2a Mon Sep 17 00:00:00 2001
+From: Daniel Hellstrom <daniel@gaisler.com>
+Date: Wed, 1 Dec 2010 16:20:01 +0100
+Subject: [PATCH] GRETH: Newer GBit MACs need setting EE bit when EDCL should be enabled
+
+---
+ drivers/net/greth.c |    2 +-
+ drivers/net/greth.h |    1 +
+ 2 files changed, 2 insertions(+), 1 deletions(-)
+
+--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
+@@ -1511,7 +1511,7 @@ static int __devinit greth_of_probe(stru
+ 	/* If we have EDCL we disable the EDCL speed-duplex FSM so
+ 	 * it doesn't interfere with the software */
+ 	if (greth->edcl != 0)
+-		GRETH_REGORIN(regs->control, GRETH_CTRL_DISDUPLEX);
+		GRETH_REGORIN(regs->control, GRETH_CTRL_DISDUPLEX|GRETH_CTRL_EE);
+ 
+ 	/* Check if MAC can handle MDIO interrupts */
+ 	greth->mdio_int_en = (tmp >> 26) & 1;
+--- a/drivers/net/greth.h
+++ b/drivers/net/greth.h
+@@ -15,6 +15,7 @@
+ #define GRETH_CTRL_PSTATIEN   0x400
+ #define GRETH_CTRL_MCEN       0x800
+ #define GRETH_CTRL_DISDUPLEX  0x1000
+#define GRETH_CTRL_EE         0x4000
+ #define GRETH_STATUS_PHYSTAT  0x100
+ 
+ #define GRETH_BD_EN 0x800