diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/mm/c-r4k.c | 64 |
1 files changed, 41 insertions, 23 deletions
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c index 01450938db8b..a78355a44c41 100644 --- a/arch/mips/mm/c-r4k.c +++ b/arch/mips/mm/c-r4k.c @@ -60,13 +60,13 @@ static unsigned long scache_size __read_mostly; /* * Dummy cache handling routines for machines without boardcaches */ -static void no_sc_noop(void) {} +static void cache_noop(void) {} static struct bcache_ops no_sc_ops = { - .bc_enable = (void *)no_sc_noop, - .bc_disable = (void *)no_sc_noop, - .bc_wback_inv = (void *)no_sc_noop, - .bc_inv = (void *)no_sc_noop + .bc_enable = (void *)cache_noop, + .bc_disable = (void *)cache_noop, + .bc_wback_inv = (void *)cache_noop, + .bc_inv = (void *)cache_noop }; struct bcache_ops *bcops = &no_sc_ops; @@ -94,7 +94,9 @@ static inline void r4k_blast_dcache_page_setup(void) { unsigned long dc_lsize = cpu_dcache_line_size(); - if (dc_lsize == 16) + if (dc_lsize == 0) + r4k_blast_dcache_page = (void *)cache_noop; + else if (dc_lsize == 16) r4k_blast_dcache_page = blast_dcache16_page; else if (dc_lsize == 32) r4k_blast_dcache_page = r4k_blast_dcache_page_dc32; @@ -106,7 +108,9 @@ static inline void r4k_blast_dcache_page_indexed_setup(void) { unsigned long dc_lsize = cpu_dcache_line_size(); - if (dc_lsize == 16) + if (dc_lsize == 0) + r4k_blast_dcache_page_indexed = (void *)cache_noop; + else if (dc_lsize == 16) r4k_blast_dcache_page_indexed = blast_dcache16_page_indexed; else if (dc_lsize == 32) r4k_blast_dcache_page_indexed = blast_dcache32_page_indexed; @@ -118,7 +122,9 @@ static inline void r4k_blast_dcache_setup(void) { unsigned long dc_lsize = cpu_dcache_line_size(); - if (dc_lsize == 16) + if (dc_lsize == 0) + r4k_blast_dcache = (void *)cache_noop; + else if (dc_lsize == 16) r4k_blast_dcache = blast_dcache16; else if (dc_lsize == 32) r4k_blast_dcache = blast_dcache32; @@ -201,7 +207,9 @@ static inline void r4k_blast_icache_page_setup(void) { unsigned long ic_lsize = cpu_icache_line_size(); - if (ic_lsize == 16) + if (ic_lsize == 0) + r4k_blast_icache_page = (void *)cache_noop; + else if (ic_lsize == 16) r4k_blast_icache_page = blast_icache16_page; else if (ic_lsize == 32) r4k_blast_icache_page = blast_icache32_page; @@ -216,7 +224,9 @@ static inline void r4k_blast_icache_page_indexed_setup(void) { unsigned long ic_lsize = cpu_icache_line_size(); - if (ic_lsize == 16) + if (ic_lsize == 0) + r4k_blast_icache_page_indexed = (void *)cache_noop; + else if (ic_lsize == 16) r4k_blast_icache_page_indexed = blast_icache16_page_indexed; else if (ic_lsize == 32) { if (R4600_V1_INDEX_ICACHEOP_WAR && cpu_is_r4600_v1_x()) @@ -238,7 +248,9 @@ static inline void r4k_blast_icache_setup(void) { unsigned long ic_lsize = cpu_icache_line_size(); - if (ic_lsize == 16) + if (ic_lsize == 0) + r4k_blast_icache = (void *)cache_noop; + else if (ic_lsize == 16) r4k_blast_icache = blast_icache16; else if (ic_lsize == 32) { if (R4600_V1_INDEX_ICACHEOP_WAR && cpu_is_r4600_v1_x()) @@ -258,7 +270,7 @@ static inline void r4k_blast_scache_page_setup(void) unsigned long sc_lsize = cpu_scache_line_size(); if (scache_size == 0) - r4k_blast_scache_page = (void *)no_sc_noop; + r4k_blast_scache_page = (void *)cache_noop; else if (sc_lsize == 16) r4k_blast_scache_page = blast_scache16_page; else if (sc_lsize == 32) @@ -276,7 +288,7 @@ static inline void r4k_blast_scache_page_indexed_setup(void) unsigned long sc_lsize = cpu_scache_line_size(); if (scache_size == 0) - r4k_blast_scache_page_indexed = (void *)no_sc_noop; + r4k_blast_scache_page_indexed = (void *)cache_noop; else if (sc_lsize == 16) r4k_blast_scache_page_indexed = blast_scache16_page_indexed; else if (sc_lsize == 32) @@ -294,7 +306,7 @@ static inline void r4k_blast_scache_setup(void) unsigned long sc_lsize = cpu_scache_line_size(); if (scache_size == 0) - r4k_blast_scache = (void *)no_sc_noop; + r4k_blast_scache = (void *)cache_noop; else if (sc_lsize == 16) r4k_blast_scache = blast_scache16; else if (sc_lsize == 32) @@ -508,7 +520,7 @@ static inline void local_r4k_flush_icache_range(void *args) unsigned long end = fir_args->end; if (!cpu_has_ic_fills_f_dc) { - if (end - start > dcache_size) { + if (end - start >= dcache_size) { r4k_blast_dcache(); } else { R4600_HIT_CACHEOP_WAR_IMPL; @@ -683,10 +695,12 @@ static void local_r4k_flush_cache_sigtramp(void * arg) unsigned long addr = (unsigned long) arg; R4600_HIT_CACHEOP_WAR_IMPL; - protected_writeback_dcache_line(addr & ~(dc_lsize - 1)); + if (dc_lsize) + protected_writeback_dcache_line(addr & ~(dc_lsize - 1)); if (!cpu_icache_snoops_remote_store && scache_size) protected_writeback_scache_line(addr & ~(sc_lsize - 1)); - protected_flush_icache_line(addr & ~(ic_lsize - 1)); + if (ic_lsize) + protected_flush_icache_line(addr & ~(ic_lsize - 1)); if (MIPS4K_ICACHE_REFILL_WAR) { __asm__ __volatile__ ( ".set push\n\t" @@ -973,8 +987,10 @@ static void __init probe_pcache(void) c->icache.waysize = icache_size / c->icache.ways; c->dcache.waysize = dcache_size / c->dcache.ways; - c->icache.sets = icache_size / (c->icache.linesz * c->icache.ways); - c->dcache.sets = dcache_size / (c->dcache.linesz * c->dcache.ways); + c->icache.sets = c->icache.linesz ? + icache_size / (c->icache.linesz * c->icache.ways) : 0; + c->dcache.sets = c->dcache.linesz ? + dcache_size / (c->dcache.linesz * c->dcache.ways) : 0; /* * R10000 and R12000 P-caches are odd in a positive way. They're 32kB @@ -1259,10 +1275,12 @@ void __init r4k_cache_init(void) * This code supports virtually indexed processors and will be * unnecessarily inefficient on physically indexed processors. */ - shm_align_mask = max_t( unsigned long, - c->dcache.sets * c->dcache.linesz - 1, - PAGE_SIZE - 1); - + if (c->dcache.linesz) + shm_align_mask = max_t( unsigned long, + c->dcache.sets * c->dcache.linesz - 1, + PAGE_SIZE - 1); + else + shm_align_mask = PAGE_SIZE-1; flush_cache_all = r4k_flush_cache_all; __flush_cache_all = r4k___flush_cache_all; flush_cache_mm = r4k_flush_cache_mm; |