--- a/arch/mips/include/asm/r4kcache.h +++ b/arch/mips/include/asm/r4kcache.h @@ -17,6 +17,20 @@ #include #include +#ifdef CONFIG_BCM47XX +#include +#include +#define BCM4710_DUMMY_RREG() ((void) *((u8 *) KSEG1ADDR(SSB_ENUM_BASE + SSB_IMSTATE))) + +#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 @@ -426,6 +426,10 @@ .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 @@ -52,6 +52,10 @@ 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 @@ -35,6 +35,9 @@ #include /* for run_uncached() */ +/* For enabling BCM4710 cache workarounds */ +int bcm4710 = 0; + /* * Special Variant of smp_call_function for use by cache functions: * @@ -111,6 +114,9 @@ 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) @@ -127,6 +133,9 @@ 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) @@ -143,6 +152,9 @@ 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) @@ -680,6 +692,8 @@ 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) @@ -1298,6 +1312,17 @@ static void __cpuinit coherency_setup(vo * silly idea of putting something else there ... */ switch (current_cpu_type()) { + case CPU_BCM3302: + { + 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: @@ -1354,6 +1379,15 @@ void __cpuinit r4k_cache_init(void) break; } + /* Check if special workarounds are required */ +#ifdef CONFIG_BCM47XX + if (current_cpu_data.cputype == CPU_BCM4710 && (current_cpu_data.processor_id & 0xff) == 0) { + printk("Enabling BCM4710A0 cache workarounds.\n"); + bcm4710 = 1; + } else +#endif + bcm4710 = 0; + probe_pcache(); setup_scache(); @@ -1412,5 +1446,13 @@ 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 } --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -738,6 +738,9 @@ 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 @@ -1190,6 +1193,9 @@ build_r4000_tlbchange_handler_head(u32 * struct uasm_reloc **r, unsigned int pte, unsigned int ptr) { +#ifdef CONFIG_BCM47XX + uasm_i_nop(p); +#endif #ifdef CONFIG_64BIT build_get_pmde64(p, l, r, pte, ptr); /* get pmd in ptr */ #else