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Diffstat (limited to 'target/linux/brcm47xx/patches-3.8/150-cpu_fixes.patch')
-rw-r--r--target/linux/brcm47xx/patches-3.8/150-cpu_fixes.patch368
1 files changed, 368 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.8/150-cpu_fixes.patch b/target/linux/brcm47xx/patches-3.8/150-cpu_fixes.patch
new file mode 100644
index 0000000000..d07b54cfc2
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.8/150-cpu_fixes.patch
@@ -0,0 +1,368 @@
+--- a/arch/mips/include/asm/r4kcache.h
++++ b/arch/mips/include/asm/r4kcache.h
+@@ -17,6 +17,20 @@
+ #include <asm/cpu-features.h>
+ #include <asm/mipsmtregs.h>
+
++#ifdef CONFIG_BCM47XX
++#include <asm/paccess.h>
++#include <linux/ssb/ssb.h>
++#define BCM4710_DUMMY_RREG() ((void) *((u8 *) KSEG1ADDR(SSB_ENUM_BASE)))
++
++#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()
++
++#define BCM4710_FILL_TLB(addr)
++#define BCM4710_PROTECTED_FILL_TLB(addr)
++#endif
++
+ /*
+ * This macro return a properly sign-extended address suitable as base address
+ * for indexed cache operations. Two issues here:
+@@ -150,6 +164,7 @@ static inline void flush_icache_line_ind
+ static inline void flush_dcache_line_indexed(unsigned long addr)
+ {
+ __dflush_prologue
++ BCM4710_DUMMY_RREG();
+ cache_op(Index_Writeback_Inv_D, addr);
+ __dflush_epilogue
+ }
+@@ -169,6 +184,7 @@ static inline void flush_icache_line(uns
+ static inline void flush_dcache_line(unsigned long addr)
+ {
+ __dflush_prologue
++ BCM4710_DUMMY_RREG();
+ cache_op(Hit_Writeback_Inv_D, addr);
+ __dflush_epilogue
+ }
+@@ -176,6 +192,7 @@ static inline void flush_dcache_line(uns
+ static inline void invalidate_dcache_line(unsigned long addr)
+ {
+ __dflush_prologue
++ BCM4710_DUMMY_RREG();
+ cache_op(Hit_Invalidate_D, addr);
+ __dflush_epilogue
+ }
+@@ -208,6 +225,7 @@ static inline void flush_scache_line(uns
+ */
+ static inline void protected_flush_icache_line(unsigned long addr)
+ {
++ BCM4710_DUMMY_RREG();
+ protected_cache_op(Hit_Invalidate_I, addr);
+ }
+
+@@ -219,6 +237,7 @@ static inline void protected_flush_icach
+ */
+ static inline void protected_writeback_dcache_line(unsigned long addr)
+ {
++ BCM4710_DUMMY_RREG();
+ protected_cache_op(Hit_Writeback_Inv_D, addr);
+ }
+
+@@ -339,8 +358,52 @@ static inline void invalidate_tcache_pag
+ : "r" (base), \
+ "i" (op));
+
++static inline void blast_dcache(void)
++{
++ unsigned long start = KSEG0;
++ unsigned long dcache_size = current_cpu_data.dcache.waysize * current_cpu_data.dcache.ways;
++ unsigned long end = (start + dcache_size);
++
++ do {
++ BCM4710_DUMMY_RREG();
++ cache_op(Index_Writeback_Inv_D, start);
++ start += current_cpu_data.dcache.linesz;
++ } while(start < end);
++}
++
++static inline void blast_dcache_page(unsigned long page)
++{
++ unsigned long start = page;
++ unsigned long end = start + PAGE_SIZE;
++
++ BCM4710_FILL_TLB(start);
++ do {
++ BCM4710_DUMMY_RREG();
++ cache_op(Hit_Writeback_Inv_D, start);
++ start += current_cpu_data.dcache.linesz;
++ } while(start < end);
++}
++
++static inline void blast_dcache_page_indexed(unsigned long page)
++{
++ unsigned long start = page;
++ unsigned long end = start + PAGE_SIZE;
++ unsigned long ws_inc = 1UL << current_cpu_data.dcache.waybit;
++ unsigned long ws_end = current_cpu_data.dcache.ways <<
++ current_cpu_data.dcache.waybit;
++ unsigned long ws, addr;
++ for (ws = 0; ws < ws_end; ws += ws_inc) {
++ start = page + ws;
++ for (addr = start; addr < end; addr += current_cpu_data.dcache.linesz) {
++ BCM4710_DUMMY_RREG();
++ cache_op(Index_Writeback_Inv_D, addr);
++ }
++ }
++}
++
++
+ /* build blast_xxx, blast_xxx_page, blast_xxx_page_indexed */
+-#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize) \
++#define __BUILD_BLAST_CACHE(pfx, desc, indexop, hitop, lsize, war) \
+ static inline void blast_##pfx##cache##lsize(void) \
+ { \
+ unsigned long start = INDEX_BASE; \
+@@ -352,6 +415,7 @@ static inline void blast_##pfx##cache##l
+ \
+ __##pfx##flush_prologue \
+ \
++ war \
+ for (ws = 0; ws < ws_end; ws += ws_inc) \
+ for (addr = start; addr < end; addr += lsize * 32) \
+ cache##lsize##_unroll32(addr|ws, indexop); \
+@@ -366,6 +430,7 @@ static inline void blast_##pfx##cache##l
+ \
+ __##pfx##flush_prologue \
+ \
++ war \
+ do { \
+ cache##lsize##_unroll32(start, hitop); \
+ start += lsize * 32; \
+@@ -384,6 +449,8 @@ static inline void blast_##pfx##cache##l
+ current_cpu_data.desc.waybit; \
+ unsigned long ws, addr; \
+ \
++ war \
++ \
+ __##pfx##flush_prologue \
+ \
+ for (ws = 0; ws < ws_end; ws += ws_inc) \
+@@ -393,36 +460,38 @@ static inline void blast_##pfx##cache##l
+ __##pfx##flush_epilogue \
+ }
+
+-__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)
+-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16)
+-__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32)
+-__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32)
+-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32)
+-__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 64)
+-__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64)
+-__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64)
+-__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, )
++__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32, )
++__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32, BCM4710_FILL_TLB(start);)
++__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32, )
++__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 64, )
++__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64, BCM4710_FILL_TLB(start);)
++__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64, )
++__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_xxx_range, protected_blast_xxx_range */
+-#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot) \
++#define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot, war, war2) \
+ static inline void prot##blast_##pfx##cache##_range(unsigned long start, \
+ unsigned long end) \
+ { \
+ unsigned long lsize = cpu_##desc##_line_size(); \
+ unsigned long addr = start & ~(lsize - 1); \
+ unsigned long aend = (end - 1) & ~(lsize - 1); \
++ war \
+ \
+ __##pfx##flush_prologue \
+ \
+ while (1) { \
++ war2 \
+ prot##cache_op(hitop, addr); \
+ if (addr == aend) \
+ break; \
+@@ -432,13 +501,13 @@ static inline void prot##blast_##pfx##ca
+ __##pfx##flush_epilogue \
+ }
+
+-__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_)
+-__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_)
+-__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_)
+-__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, )
+-__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, )
++__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_, BCM4710_PROTECTED_FILL_TLB(addr); BCM4710_PROTECTED_FILL_TLB(aend);, BCM4710_DUMMY_RREG();)
++__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_,, )
++__BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_,, )
++__BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D,, BCM4710_FILL_TLB(addr); BCM4710_FILL_TLB(aend);, BCM4710_DUMMY_RREG();)
++__BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD,,, )
+ /* blast_inv_dcache_range */
+-__BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D, )
+-__BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD, )
++__BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D,,,BCM4710_DUMMY_RREG();)
++__BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD,,, )
+
+ #endif /* _ASM_R4KCACHE_H */
+--- a/arch/mips/include/asm/stackframe.h
++++ b/arch/mips/include/asm/stackframe.h
+@@ -449,6 +449,10 @@
+ .macro RESTORE_SP_AND_RET
+ LONG_L sp, PT_R29(sp)
+ .set mips3
++#ifdef CONFIG_BCM47XX
++ nop
++ nop
++#endif
+ eret
+ .set mips0
+ .endm
+--- a/arch/mips/kernel/genex.S
++++ b/arch/mips/kernel/genex.S
+@@ -51,6 +51,10 @@ NESTED(except_vec1_generic, 0, sp)
+ 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
+--- a/arch/mips/mm/c-r4k.c
++++ b/arch/mips/mm/c-r4k.c
+@@ -34,6 +34,9 @@
+ #include <asm/cacheflush.h> /* for run_uncached() */
+ #include <asm/traps.h>
+
++/* For enabling BCM4710 cache workarounds */
++int bcm4710 = 0;
++
+ /*
+ * Special Variant of smp_call_function for use by cache functions:
+ *
+@@ -110,6 +113,9 @@ static void __cpuinit r4k_blast_dcache_p
+ {
+ unsigned long dc_lsize = cpu_dcache_line_size();
+
++ if (bcm4710)
++ r4k_blast_dcache_page = blast_dcache_page;
++ else
+ if (dc_lsize == 0)
+ r4k_blast_dcache_page = (void *)cache_noop;
+ else if (dc_lsize == 16)
+@@ -126,6 +132,9 @@ static void __cpuinit r4k_blast_dcache_p
+ {
+ unsigned long dc_lsize = cpu_dcache_line_size();
+
++ if (bcm4710)
++ r4k_blast_dcache_page_indexed = blast_dcache_page_indexed;
++ else
+ if (dc_lsize == 0)
+ r4k_blast_dcache_page_indexed = (void *)cache_noop;
+ else if (dc_lsize == 16)
+@@ -142,6 +151,9 @@ static void __cpuinit r4k_blast_dcache_s
+ {
+ unsigned long dc_lsize = cpu_dcache_line_size();
+
++ if (bcm4710)
++ r4k_blast_dcache = blast_dcache;
++ else
+ if (dc_lsize == 0)
+ r4k_blast_dcache = (void *)cache_noop;
+ else if (dc_lsize == 16)
+@@ -671,6 +683,8 @@ static void local_r4k_flush_cache_sigtra
+ unsigned long addr = (unsigned long) arg;
+
+ R4600_HIT_CACHEOP_WAR_IMPL;
++ BCM4710_PROTECTED_FILL_TLB(addr);
++ BCM4710_PROTECTED_FILL_TLB(addr + 4);
+ if (dc_lsize)
+ protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
+ if (!cpu_icache_snoops_remote_store && scache_size)
+@@ -1355,6 +1369,17 @@ static void __cpuinit coherency_setup(vo
+ * silly idea of putting something else there ...
+ */
+ switch (current_cpu_type()) {
++ case CPU_BMIPS3300:
++ {
++ u32 cm;
++ cm = read_c0_diag();
++ /* Enable icache */
++ cm |= (1 << 31);
++ /* Enable dcache */
++ cm |= (1 << 30);
++ write_c0_diag(cm);
++ }
++ break;
+ case CPU_R4000PC:
+ case CPU_R4000SC:
+ case CPU_R4000MC:
+@@ -1416,6 +1441,15 @@ void __cpuinit r4k_cache_init(void)
+ extern void build_copy_page(void);
+ struct cpuinfo_mips *c = &current_cpu_data;
+
++ /* Check if special workarounds are required */
++#ifdef CONFIG_BCM47XX
++ if (current_cpu_data.cputype == CPU_BMIPS32 && (current_cpu_data.processor_id & 0xff) == 0) {
++ printk("Enabling BCM4710A0 cache workarounds.\n");
++ bcm4710 = 1;
++ } else
++#endif
++ bcm4710 = 0;
++
+ probe_pcache();
+ setup_scache();
+
+@@ -1476,6 +1510,14 @@ void __cpuinit r4k_cache_init(void)
+ #if !defined(CONFIG_MIPS_CMP)
+ local_r4k___flush_cache_all(NULL);
+ #endif
++#ifdef CONFIG_BCM47XX
++ {
++ static void (*_coherency_setup)(void);
++ _coherency_setup = (void (*)(void)) KSEG1ADDR(coherency_setup);
++ _coherency_setup();
++ }
++#else
+ coherency_setup();
++#endif
+ board_cache_error_setup = r4k_cache_error_setup;
+ }
+--- a/arch/mips/mm/tlbex.c
++++ b/arch/mips/mm/tlbex.c
+@@ -1314,6 +1314,9 @@ static void __cpuinit build_r4000_tlb_re
+ /* No need for uasm_i_nop */
+ }
+
++#ifdef CONFIG_BCM47XX
++ uasm_i_nop(&p);
++#endif
+ #ifdef CONFIG_64BIT
+ build_get_pmde64(&p, &l, &r, K0, K1); /* get pmd in K1 */
+ #else
+@@ -1845,6 +1848,9 @@ build_r4000_tlbchange_handler_head(u32 *
+ {
+ struct work_registers wr = build_get_work_registers(p);
+
++#ifdef CONFIG_BCM47XX
++ uasm_i_nop(p);
++#endif
+ #ifdef CONFIG_64BIT
+ build_get_pmde64(p, l, r, wr.r1, wr.r2); /* get pmd in ptr */
+ #else
generated by cgit v1.2.3 (git 2.46.0) at 2024-12-27 21:02:54 +0000