diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-06-25 12:30:10 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-06-25 12:30:10 +0200 |
| commit | 28f73e51d0f64a5b896ad816ab8df6f3bcec5810 (patch) | |
| tree | 8c51ad5ff74d6ef5d1d68121c9f9aadce836736e /arch/mips/mm | |
| parent | f3f3149f35b9195ef4b761b1353fc0766b5f53be (diff) | |
| parent | 543cf4cb3fe6f6cae3651ba918b9c56200b257d0 (diff) | |
Merge branch 'linus' into x86/delay
Conflicts:
arch/x86/kernel/tsc_32.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/mips/mm')
| -rw-r--r-- | arch/mips/mm/c-r4k.c | 33 | ||||
| -rw-r--r-- | arch/mips/mm/init.c | 1 | ||||
| -rw-r--r-- | arch/mips/mm/page.c | 2 |
3 files changed, 33 insertions, 3 deletions
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c index 643c8bcffff..27096751ddc 100644 --- a/arch/mips/mm/c-r4k.c +++ b/arch/mips/mm/c-r4k.c @@ -446,6 +446,7 @@ static inline void local_r4k_flush_cache_page(void *args) struct page *page = pfn_to_page(fcp_args->pfn); int exec = vma->vm_flags & VM_EXEC; struct mm_struct *mm = vma->vm_mm; + int map_coherent = 0; pgd_t *pgdp; pud_t *pudp; pmd_t *pmdp; @@ -479,7 +480,9 @@ static inline void local_r4k_flush_cache_page(void *args) * Use kmap_coherent or kmap_atomic to do flushes for * another ASID than the current one. */ - if (cpu_has_dc_aliases) + map_coherent = (cpu_has_dc_aliases && + page_mapped(page) && !Page_dcache_dirty(page)); + if (map_coherent) vaddr = kmap_coherent(page, addr); else vaddr = kmap_atomic(page, KM_USER0); @@ -502,7 +505,7 @@ static inline void local_r4k_flush_cache_page(void *args) } if (vaddr) { - if (cpu_has_dc_aliases) + if (map_coherent) kunmap_coherent(); else kunmap_atomic(vaddr, KM_USER0); @@ -1226,6 +1229,28 @@ void au1x00_fixup_config_od(void) } } +/* CP0 hazard avoidance. */ +#define NXP_BARRIER() \ + __asm__ __volatile__( \ + ".set noreorder\n\t" \ + "nop; nop; nop; nop; nop; nop;\n\t" \ + ".set reorder\n\t") + +static void nxp_pr4450_fixup_config(void) +{ + unsigned long config0; + + config0 = read_c0_config(); + + /* clear all three cache coherency fields */ + config0 &= ~(0x7 | (7 << 25) | (7 << 28)); + config0 |= (((_page_cachable_default >> _CACHE_SHIFT) << 0) | + ((_page_cachable_default >> _CACHE_SHIFT) << 25) | + ((_page_cachable_default >> _CACHE_SHIFT) << 28)); + write_c0_config(config0); + NXP_BARRIER(); +} + static int __cpuinitdata cca = -1; static int __init cca_setup(char *str) @@ -1271,6 +1296,10 @@ static void __cpuinit coherency_setup(void) case CPU_AU1500: /* rev. AB */ au1x00_fixup_config_od(); break; + + case PRID_IMP_PR4450: + nxp_pr4450_fixup_config(); + break; } } diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c index ecd562d2c34..137c14bafd6 100644 --- a/arch/mips/mm/init.c +++ b/arch/mips/mm/init.c @@ -71,6 +71,7 @@ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); * don't have to care about aliases on other CPUs. */ unsigned long empty_zero_page, zero_page_mask; +EXPORT_SYMBOL_GPL(empty_zero_page); /* * Not static inline because used by IP27 special magic initialization code diff --git a/arch/mips/mm/page.c b/arch/mips/mm/page.c index cab81f42eee..1edf0cbbeed 100644 --- a/arch/mips/mm/page.c +++ b/arch/mips/mm/page.c @@ -460,7 +460,7 @@ void __cpuinit build_copy_page(void) build_copy_load_pref(&buf, -off); off -= cache_line_size; } - off = cache_line_size ? min(8, pref_bias_copy_load / cache_line_size) * + off = cache_line_size ? min(8, pref_bias_copy_store / cache_line_size) * cache_line_size : 0; while (off) { build_copy_store_pref(&buf, -off); |