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brcm47xx: merge cpu cache workaround patches into one, ensure they get compiled out on mips74k

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Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
2016-11-25 13:09:58 +01:00
parent 1cd7ff3e96
commit f12f77b477
2 changed files with 115 additions and 177 deletions
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154
target/linux/brcm47xx/patches-4.4/159-cpu_fixes.patch
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@@ -1,16 +1,34 @@
--- a/arch/mips/include/asm/r4kcache.h
+++ b/arch/mips/include/asm/r4kcache.h
@@ -25,6 +25,20 @@
@@ -25,6 +25,38 @@
extern void (*r4k_blast_dcache)(void);
extern void (*r4k_blast_icache)(void);
+#ifdef CONFIG_BCM47XX
+#if defined(CONFIG_BCM47XX) && !defined(CONFIG_CPU_MIPS32_R2)
+#include <asm/paccess.h>
+#include <linux/ssb/ssb.h>
+#define BCM4710_DUMMY_RREG() ((void) *((u8 *) KSEG1ADDR(SSB_ENUM_BASE)))
+#define BCM4710_DUMMY_RREG() bcm4710_dummy_rreg()
+
+static inline unsigned long bcm4710_dummy_rreg(void)
+{
+ return *(volatile unsigned long *)(KSEG1ADDR(SSB_ENUM_BASE));
+}
+
+#define BCM4710_FILL_TLB(addr) bcm4710_fill_tlb((void *)(addr))
+
+static inline unsigned long bcm4710_fill_tlb(void *addr)
+{
+ return *(unsigned long *)addr;
+}
+
+#define BCM4710_PROTECTED_FILL_TLB(addr) bcm4710_protected_fill_tlb((void *)(addr))
+
+static inline void bcm4710_protected_fill_tlb(void *addr)
+{
+ unsigned long x;
+ get_dbe(x, (unsigned long *)addr);;
+}
+
+#define BCM4710_FILL_TLB(addr) (*(volatile unsigned long *)(addr))
+#define BCM4710_PROTECTED_FILL_TLB(addr) ({ unsigned long x; get_dbe(x, (volatile unsigned long *)(addr)); })
+#else
+#define BCM4710_DUMMY_RREG()
+
@@ -21,7 +39,7 @@
/*
* This macro return a properly sign-extended address suitable as base address
* for indexed cache operations. Two issues here:
@@ -98,6 +112,7 @@ static inline void flush_icache_line_ind
@@ -98,6 +130,7 @@ static inline void flush_icache_line_ind
static inline void flush_dcache_line_indexed(unsigned long addr)
{
__dflush_prologue
@@ -29,7 +47,7 @@
cache_op(Index_Writeback_Inv_D, addr);
__dflush_epilogue
}
@@ -125,6 +140,7 @@ static inline void flush_icache_line(uns
@@ -125,6 +158,7 @@ static inline void flush_icache_line(uns
static inline void flush_dcache_line(unsigned long addr)
{
__dflush_prologue
@@ -37,7 +55,7 @@
cache_op(Hit_Writeback_Inv_D, addr);
__dflush_epilogue
}
@@ -132,6 +148,7 @@ static inline void flush_dcache_line(uns
@@ -132,6 +166,7 @@ static inline void flush_dcache_line(uns
static inline void invalidate_dcache_line(unsigned long addr)
{
__dflush_prologue
@@ -45,7 +63,7 @@
cache_op(Hit_Invalidate_D, addr);
__dflush_epilogue
}
@@ -187,6 +204,7 @@ static inline void protected_flush_icach
@@ -187,6 +222,7 @@ static inline void protected_flush_icach
#ifdef CONFIG_EVA
protected_cachee_op(Hit_Invalidate_I, addr);
#else
@@ -53,7 +71,7 @@
protected_cache_op(Hit_Invalidate_I, addr);
#endif
break;
@@ -201,6 +219,7 @@ static inline void protected_flush_icach
@@ -201,6 +237,7 @@ static inline void protected_flush_icach
*/
static inline void protected_writeback_dcache_line(unsigned long addr)
{
@@ -61,7 +79,7 @@
#ifdef CONFIG_EVA
protected_cachee_op(Hit_Writeback_Inv_D, addr);
#else
@@ -554,8 +573,51 @@ static inline void invalidate_tcache_pag
@@ -554,8 +591,51 @@ static inline void invalidate_tcache_pag
: "r" (base), \
"i" (op));
@@ -114,7 +132,7 @@
static inline void extra##blast_##pfx##cache##lsize(void) \
{ \
unsigned long start = INDEX_BASE; \
@@ -567,6 +629,7 @@ static inline void extra##blast_##pfx##c
@@ -567,6 +647,7 @@ static inline void extra##blast_##pfx##c
\
__##pfx##flush_prologue \
\
@@ -122,7 +140,7 @@
for (ws = 0; ws < ws_end; ws += ws_inc) \
for (addr = start; addr < end; addr += lsize * 32) \
cache##lsize##_unroll32(addr|ws, indexop); \
@@ -581,6 +644,7 @@ static inline void extra##blast_##pfx##c
@@ -581,6 +662,7 @@ static inline void extra##blast_##pfx##c
\
__##pfx##flush_prologue \
\
@@ -130,7 +148,7 @@
do { \
cache##lsize##_unroll32(start, hitop); \
start += lsize * 32; \
@@ -599,6 +663,8 @@ static inline void extra##blast_##pfx##c
@@ -599,6 +681,8 @@ static inline void extra##blast_##pfx##c
current_cpu_data.desc.waybit; \
unsigned long ws, addr; \
\
@@ -139,7 +157,7 @@
__##pfx##flush_prologue \
\
for (ws = 0; ws < ws_end; ws += ws_inc) \
@@ -608,26 +674,26 @@ static inline void extra##blast_##pfx##c
@@ -608,26 +692,26 @@ static inline void extra##blast_##pfx##c
__##pfx##flush_epilogue \
}
@@ -156,13 +174,6 @@
-__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 128, )
-__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 128, )
-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128, )
-
-__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16, )
-__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32, )
-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16, )
-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32, )
-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64, )
-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128, )
+__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16, , )
+__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16, , BCM4710_FILL_TLB(start);)
+__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16, , )
@@ -176,7 +187,13 @@
+__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 128, , )
+__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 128, , )
+__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128, , )
+
-__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16, )
-__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32, )
-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16, )
-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32, )
-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64, )
-__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128, )
+__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16, , )
+__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32, , )
+__BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16, , )
@@ -186,7 +203,7 @@
#define __BUILD_BLAST_USER_CACHE(pfx, desc, indexop, hitop, lsize) \
static inline void blast_##pfx##cache##lsize##_user_page(unsigned long page) \
@@ -656,17 +722,19 @@ __BUILD_BLAST_USER_CACHE(d, dcache, Inde
@@ -656,17 +740,19 @@ __BUILD_BLAST_USER_CACHE(d, dcache, Inde
__BUILD_BLAST_USER_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64)
/* build blast_xxx_range, protected_blast_xxx_range */
@@ -207,7 +224,7 @@
prot##cache_op(hitop, addr); \
if (addr == aend) \
break; \
@@ -678,8 +746,8 @@ static inline void prot##extra##blast_##
@@ -678,8 +764,8 @@ static inline void prot##extra##blast_##
#ifndef CONFIG_EVA
@@ -218,7 +235,7 @@
#else
@@ -716,14 +784,14 @@ __BUILD_PROT_BLAST_CACHE_RANGE(d, dcache
@@ -716,14 +802,14 @@ __BUILD_PROT_BLAST_CACHE_RANGE(d, dcache
__BUILD_PROT_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I)
#endif
@@ -255,17 +272,46 @@
.endm
--- a/arch/mips/kernel/genex.S
+++ b/arch/mips/kernel/genex.S
@@ -32,6 +32,10 @@
@@ -21,6 +21,19 @@
#include <asm/war.h>
#include <asm/thread_info.h>
+#ifdef CONFIG_BCM47XX
+# ifdef eret
+# undef eret
+# endif
+# define eret \
+ .set push; \
+ .set noreorder; \
+ nop; \
+ nop; \
+ eret; \
+ .set pop;
+#endif
+
__INIT
/*
@@ -32,6 +45,9 @@
NESTED(except_vec3_generic, 0, sp)
.set push
.set noat
+#ifdef CONFIG_BCM47XX
+ nop
+ nop
+#endif
#if R5432_CP0_INTERRUPT_WAR
mfc0 k0, CP0_INDEX
#endif
@@ -55,6 +71,9 @@ NESTED(except_vec3_r4000, 0, sp)
.set push
.set arch=r4000
.set noat
+#ifdef CONFIG_BCM47XX
+ nop
+#endif
mfc0 k1, CP0_CAUSE
li k0, 31<<2
andi k1, k1, 0x7c
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -39,6 +39,9 @@
@@ -273,7 +319,7 @@
#include <asm/mips-cm.h>
+/* For enabling BCM4710 cache workarounds */
+int bcm4710 = 0;
+static int bcm4710 = 0;
+
/*
* Bits describing what cache ops an IPI callback function may perform.
@@ -340,7 +386,7 @@
struct cpuinfo_mips *c = &current_cpu_data;
+ /* Check if special workarounds are required */
+#ifdef CONFIG_BCM47XX
+#if defined(CONFIG_BCM47XX) && !defined(CONFIG_CPU_MIPS32_R2)
+ if (current_cpu_data.cputype == CPU_BMIPS32 && (current_cpu_data.processor_id & 0xff) == 0) {
+ printk("Enabling BCM4710A0 cache workarounds.\n");
+ bcm4710 = 1;
@@ -369,23 +415,53 @@
/*
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -1281,6 +1281,9 @@ static void build_r4000_tlb_refill_handl
/* No need for uasm_i_nop */
}
@@ -943,6 +943,9 @@ build_get_pgde32(u32 **p, unsigned int t
uasm_i_srl(p, ptr, ptr, SMP_CPUID_PTRSHIFT);
uasm_i_addu(p, ptr, tmp, ptr);
#else
+#ifdef CONFIG_BCM47XX
+ uasm_i_nop(&p);
+ uasm_i_nop(p);
+#endif
UASM_i_LA_mostly(p, ptr, pgdc);
#endif
uasm_i_mfc0(p, tmp, C0_BADVADDR); /* get faulting address */
@@ -1284,6 +1287,9 @@ static void build_r4000_tlb_refill_handl
#ifdef CONFIG_64BIT
build_get_pmde64(&p, &l, &r, K0, K1); /* get pmd in K1 */
#else
@@ -1868,6 +1871,9 @@ build_r4000_tlbchange_handler_head(u32 *
{
struct work_registers wr = build_get_work_registers(p);
+# ifdef CONFIG_BCM47XX
+ uasm_i_nop(&p);
+# endif
build_get_pgde32(&p, K0, K1); /* get pgd in K1 */
#endif
@@ -1295,6 +1301,9 @@ static void build_r4000_tlb_refill_handl
build_update_entries(&p, K0, K1);
build_tlb_write_entry(&p, &l, &r, tlb_random);
uasm_l_leave(&l, p);
+#ifdef CONFIG_BCM47XX
+ uasm_i_nop(p);
+ uasm_i_nop(&p);
+#endif
uasm_i_eret(&p); /* return from trap */
}
#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
@@ -1871,6 +1880,9 @@ build_r4000_tlbchange_handler_head(u32 *
#ifdef CONFIG_64BIT
build_get_pmde64(p, l, r, wr.r1, wr.r2); /* get pmd in ptr */
#else
+# ifdef CONFIG_BCM47XX
+ uasm_i_nop(p);
+# endif
build_get_pgde32(p, wr.r1, wr.r2); /* get pgd in ptr */
#endif
@@ -1917,6 +1929,9 @@ build_r4000_tlbchange_handler_tail(u32 *
build_tlb_write_entry(p, l, r, tlb_indexed);
uasm_l_leave(l, *p);
build_restore_work_registers(p);
+#ifdef CONFIG_BCM47XX
+ uasm_i_nop(p);
+#endif
uasm_i_eret(p); /* return from trap */
#ifdef CONFIG_64BIT