diff options
| -rw-r--r-- | arch/mips/mm/init.c | 167 | ||||
| -rw-r--r-- | arch/mips/mm/pgtable-32.c | 7 | ||||
| -rw-r--r-- | arch/mips/mm/pgtable-64.c | 11 | ||||
| -rw-r--r-- | include/asm-mips/cacheflush.h | 19 | ||||
| -rw-r--r-- | include/asm-mips/fixmap.h | 14 |
5 files changed, 190 insertions, 28 deletions
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c index 88b72c9a849..2de4d3c367a 100644 --- a/arch/mips/mm/init.c +++ b/arch/mips/mm/init.c @@ -30,11 +30,34 @@ #include <asm/cachectl.h> #include <asm/cpu.h> #include <asm/dma.h> +#include <asm/kmap_types.h> #include <asm/mmu_context.h> #include <asm/sections.h> #include <asm/pgtable.h> #include <asm/pgalloc.h> #include <asm/tlb.h> +#include <asm/fixmap.h> + +/* Atomicity and interruptability */ +#ifdef CONFIG_MIPS_MT_SMTC + +#include <asm/mipsmtregs.h> + +#define ENTER_CRITICAL(flags) \ + { \ + unsigned int mvpflags; \ + local_irq_save(flags);\ + mvpflags = dvpe() +#define EXIT_CRITICAL(flags) \ + evpe(mvpflags); \ + local_irq_restore(flags); \ + } +#else + +#define ENTER_CRITICAL(flags) local_irq_save(flags) +#define EXIT_CRITICAL(flags) local_irq_restore(flags) + +#endif /* CONFIG_MIPS_MT_SMTC */ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); @@ -80,13 +103,142 @@ unsigned long setup_zero_pages(void) return 1UL << order; } -#ifdef CONFIG_HIGHMEM -pte_t *kmap_pte; -pgprot_t kmap_prot; +/* + * These are almost like kmap_atomic / kunmap_atmic except they take an + * additional address argument as the hint. + */ #define kmap_get_fixmap_pte(vaddr) \ pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), (vaddr)), (vaddr)), (vaddr)) +#ifdef CONFIG_MIPS_MT_SMTC +static pte_t *kmap_coherent_pte; +static void __init kmap_coherent_init(void) +{ + unsigned long vaddr; + + /* cache the first coherent kmap pte */ + vaddr = __fix_to_virt(FIX_CMAP_BEGIN); + kmap_coherent_pte = kmap_get_fixmap_pte(vaddr); +} +#else +static inline void kmap_coherent_init(void) {} +#endif + +static inline void *kmap_coherent(struct page *page, unsigned long addr) +{ + enum fixed_addresses idx; + unsigned long vaddr, flags, entrylo; + unsigned long old_ctx; + pte_t pte; + int tlbidx; + + inc_preempt_count(); + idx = (addr >> PAGE_SHIFT) & (FIX_N_COLOURS - 1); +#ifdef CONFIG_MIPS_MT_SMTC + idx += FIX_N_COLOURS * smp_processor_id(); +#endif + vaddr = __fix_to_virt(FIX_CMAP_END - idx); + pte = mk_pte(page, PAGE_KERNEL); +#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1) + entrylo = pte.pte_high; +#else + entrylo = pte_val(pte) >> 6; +#endif + + ENTER_CRITICAL(flags); + old_ctx = read_c0_entryhi(); + write_c0_entryhi(vaddr & (PAGE_MASK << 1)); + write_c0_entrylo0(entrylo); + write_c0_entrylo1(entrylo); +#ifdef CONFIG_MIPS_MT_SMTC + set_pte(kmap_coherent_pte - (FIX_CMAP_END - idx), pte); + /* preload TLB instead of local_flush_tlb_one() */ + mtc0_tlbw_hazard(); + tlb_probe(); + tlb_probe_hazard(); + tlbidx = read_c0_index(); + mtc0_tlbw_hazard(); + if (tlbidx < 0) + tlb_write_random(); + else + tlb_write_indexed(); +#else + tlbidx = read_c0_wired(); + write_c0_wired(tlbidx + 1); + write_c0_index(tlbidx); + mtc0_tlbw_hazard(); + tlb_write_indexed(); +#endif + tlbw_use_hazard(); + write_c0_entryhi(old_ctx); + EXIT_CRITICAL(flags); + + return (void*) vaddr; +} + +#define UNIQUE_ENTRYHI(idx) (CKSEG0 + ((idx) << (PAGE_SHIFT + 1))) + +static inline void kunmap_coherent(struct page *page) +{ +#ifndef CONFIG_MIPS_MT_SMTC + unsigned int wired; + unsigned long flags, old_ctx; + + ENTER_CRITICAL(flags); + old_ctx = read_c0_entryhi(); + wired = read_c0_wired() - 1; + write_c0_wired(wired); + write_c0_index(wired); + write_c0_entryhi(UNIQUE_ENTRYHI(wired)); + write_c0_entrylo0(0); + write_c0_entrylo1(0); + mtc0_tlbw_hazard(); + tlb_write_indexed(); + tlbw_use_hazard(); + write_c0_entryhi(old_ctx); + EXIT_CRITICAL(flags); +#endif + dec_preempt_count(); + preempt_check_resched(); +} + +void copy_to_user_page(struct vm_area_struct *vma, + struct page *page, unsigned long vaddr, void *dst, const void *src, + unsigned long len) +{ + if (cpu_has_dc_aliases) { + void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK); + memcpy(vto, src, len); + kunmap_coherent(page); + } else + memcpy(dst, src, len); + if ((vma->vm_flags & VM_EXEC) && !cpu_has_ic_fills_f_dc) + flush_cache_page(vma, vaddr, page_to_pfn(page)); +} + +EXPORT_SYMBOL(copy_to_user_page); + +void copy_from_user_page(struct vm_area_struct *vma, + struct page *page, unsigned long vaddr, void *dst, const void *src, + unsigned long len) +{ + if (cpu_has_dc_aliases) { + void *vfrom = + kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK); + memcpy(dst, vfrom, len); + kunmap_coherent(page); + } else + memcpy(dst, src, len); +} + +EXPORT_SYMBOL(copy_from_user_page); + + +#ifdef CONFIG_HIGHMEM +pte_t *kmap_pte; +pgprot_t kmap_prot; + static void __init kmap_init(void) { unsigned long kmap_vstart; @@ -97,11 +249,12 @@ static void __init kmap_init(void) kmap_prot = PAGE_KERNEL; } +#endif /* CONFIG_HIGHMEM */ -#ifdef CONFIG_32BIT void __init fixrange_init(unsigned long start, unsigned long end, pgd_t *pgd_base) { +#if defined(CONFIG_HIGHMEM) || defined(CONFIG_MIPS_MT_SMTC) pgd_t *pgd; pud_t *pud; pmd_t *pmd; @@ -122,7 +275,7 @@ void __init fixrange_init(unsigned long start, unsigned long end, for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) { if (pmd_none(*pmd)) { pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE); - set_pmd(pmd, __pmd(pte)); + set_pmd(pmd, __pmd((unsigned long)pte)); if (pte != pte_offset_kernel(pmd, 0)) BUG(); } @@ -132,9 +285,8 @@ void __init fixrange_init(unsigned long start, unsigned long end, } j = 0; } +#endif } -#endif /* CONFIG_32BIT */ -#endif /* CONFIG_HIGHMEM */ #ifndef CONFIG_NEED_MULTIPLE_NODES extern void pagetable_init(void); @@ -175,6 +327,7 @@ void __init paging_init(void) #ifdef CONFIG_HIGHMEM kmap_init(); #endif + kmap_coherent_init(); max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; low = max_low_pfn; diff --git a/arch/mips/mm/pgtable-32.c b/arch/mips/mm/pgtable-32.c index 4bdaa05f485..4a61e624b0e 100644 --- a/arch/mips/mm/pgtable-32.c +++ b/arch/mips/mm/pgtable-32.c @@ -31,9 +31,10 @@ void pgd_init(unsigned long page) void __init pagetable_init(void) { -#ifdef CONFIG_HIGHMEM unsigned long vaddr; - pgd_t *pgd, *pgd_base; + pgd_t *pgd_base; +#ifdef CONFIG_HIGHMEM + pgd_t *pgd; pud_t *pud; pmd_t *pmd; pte_t *pte; @@ -44,7 +45,6 @@ void __init pagetable_init(void) pgd_init((unsigned long)swapper_pg_dir + sizeof(pgd_t) * USER_PTRS_PER_PGD); -#ifdef CONFIG_HIGHMEM pgd_base = swapper_pg_dir; /* @@ -53,6 +53,7 @@ void __init pagetable_init(void) vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; fixrange_init(vaddr, 0, pgd_base); +#ifdef CONFIG_HIGHMEM /* * Permanent kmaps: */ diff --git a/arch/mips/mm/pgtable-64.c b/arch/mips/mm/pgtable-64.c index 44b5e97fff6..8d600d307d5 100644 --- a/arch/mips/mm/pgtable-64.c +++ b/arch/mips/mm/pgtable-64.c @@ -8,6 +8,7 @@ */ #include <linux/init.h> #include <linux/mm.h> +#include <asm/fixmap.h> #include <asm/pgtable.h> void pgd_init(unsigned long page) @@ -52,7 +53,17 @@ void pmd_init(unsigned long addr, unsigned long pagetable) void __init pagetable_init(void) { + unsigned long vaddr; + pgd_t *pgd_base; + /* Initialize the entire pgd. */ pgd_init((unsigned long)swapper_pg_dir); pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table); + + pgd_base = swapper_pg_dir; + /* + * Fixed mappings: + */ + vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; + fixrange_init(vaddr, 0, pgd_base); } diff --git a/include/asm-mips/cacheflush.h b/include/asm-mips/cacheflush.h index 9ab59e2bb23..e3c9925876a 100644 --- a/include/asm-mips/cacheflush.h +++ b/include/asm-mips/cacheflush.h @@ -55,24 +55,13 @@ extern void (*flush_icache_range)(unsigned long start, unsigned long end); #define flush_cache_vmap(start, end) flush_cache_all() #define flush_cache_vunmap(start, end) flush_cache_all() -static inline void copy_to_user_page(struct vm_area_struct *vma, +extern void copy_to_user_page(struct vm_area_struct *vma, struct page *page, unsigned long vaddr, void *dst, const void *src, - unsigned long len) -{ - if (cpu_has_dc_aliases) - flush_cache_page(vma, vaddr, page_to_pfn(page)); - memcpy(dst, src, len); - __flush_icache_page(vma, page); -} + unsigned long len); -static inline void copy_from_user_page(struct vm_area_struct *vma, +extern void copy_from_user_page(struct vm_area_struct *vma, struct page *page, unsigned long vaddr, void *dst, const void *src, - unsigned long len) -{ - if (cpu_has_dc_aliases) - flush_cache_page(vma, vaddr, page_to_pfn(page)); - memcpy(dst, src, len); -} + unsigned long len); extern void (*flush_cache_sigtramp)(unsigned long addr); extern void (*flush_icache_all)(void); diff --git a/include/asm-mips/fixmap.h b/include/asm-mips/fixmap.h index 6959bdb5931..02c8a13fc89 100644 --- a/include/asm-mips/fixmap.h +++ b/include/asm-mips/fixmap.h @@ -45,8 +45,16 @@ * fix-mapped? */ enum fixed_addresses { +#define FIX_N_COLOURS 8 + FIX_CMAP_BEGIN, +#ifdef CONFIG_MIPS_MT_SMTC + FIX_CMAP_END = FIX_CMAP_BEGIN + (FIX_N_COLOURS * NR_CPUS), +#else + FIX_CMAP_END = FIX_CMAP_BEGIN + FIX_N_COLOURS, +#endif #ifdef CONFIG_HIGHMEM - FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */ + /* reserved pte's for temporary kernel mappings */ + FIX_KMAP_BEGIN = FIX_CMAP_END + 1, FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1, #endif __end_of_fixed_addresses @@ -70,9 +78,9 @@ extern void __set_fixmap (enum fixed_addresses idx, * at the top of mem.. */ #if defined(CONFIG_CPU_TX39XX) || defined(CONFIG_CPU_TX49XX) -#define FIXADDR_TOP (0xff000000UL - 0x2000) +#define FIXADDR_TOP ((unsigned long)(long)(int)(0xff000000 - 0x20000)) #else -#define FIXADDR_TOP (0xffffe000UL) +#define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000) #endif #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) |