X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;ds=sidebyside;f=arch%2Fmips%2Fmm%2Finit.c;h=49065c133ebf4987d7f48666e90b0bac3076308c;hb=refs%2Fheads%2Fvserver;hp=0ff9a348b84317b2c915de9aeb485839fb1ff1ce;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c index 0ff9a348b..49065c133 100644 --- a/arch/mips/mm/init.c +++ b/arch/mips/mm/init.c @@ -8,7 +8,6 @@ * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved. */ -#include #include #include #include @@ -25,16 +24,40 @@ #include #include #include +#include #include #include #include #include +#include #include #include #include #include #include +#include + +/* Atomicity and interruptability */ +#ifdef CONFIG_MIPS_MT_SMTC + +#include + +#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); @@ -54,7 +77,8 @@ unsigned long empty_zero_page, zero_page_mask; */ unsigned long setup_zero_pages(void) { - unsigned long order, size; + unsigned int order; + unsigned long size; struct page *page; if (cpu_has_vce) @@ -66,10 +90,10 @@ unsigned long setup_zero_pages(void) if (!empty_zero_page) panic("Oh boy, that early out of memory?"); - page = virt_to_page(empty_zero_page); - while (page < virt_to_page(empty_zero_page + (PAGE_SIZE << order))) { + page = virt_to_page((void *)empty_zero_page); + split_page(page, order); + while (page < virt_to_page((void *)(empty_zero_page + (PAGE_SIZE << order)))) { SetPageReserved(page); - set_page_count(page, 1); page++; } @@ -79,13 +103,167 @@ 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_user_highpage(struct page *to, struct page *from, + unsigned long vaddr, struct vm_area_struct *vma) +{ + void *vfrom, *vto; + + vto = kmap_atomic(to, KM_USER1); + if (cpu_has_dc_aliases) { + vfrom = kmap_coherent(from, vaddr); + copy_page(vto, vfrom); + kunmap_coherent(from); + } else { + vfrom = kmap_atomic(from, KM_USER0); + copy_page(vto, vfrom); + kunmap_atomic(vfrom, KM_USER0); + } + if (((vma->vm_flags & VM_EXEC) && !cpu_has_ic_fills_f_dc) || + pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK)) + flush_data_cache_page((unsigned long)vto); + kunmap_atomic(vto, KM_USER1); + /* Make sure this page is cleared on other CPU's too before using it */ + smp_wmb(); +} + +EXPORT_SYMBOL(copy_user_highpage); + +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; @@ -96,11 +274,12 @@ 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; @@ -121,7 +300,7 @@ 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(); } @@ -131,27 +310,52 @@ 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); +static int __init page_is_ram(unsigned long pagenr) +{ + int i; + + for (i = 0; i < boot_mem_map.nr_map; i++) { + unsigned long addr, end; + + if (boot_mem_map.map[i].type != BOOT_MEM_RAM) + /* not usable memory */ + continue; + + addr = PFN_UP(boot_mem_map.map[i].addr); + end = PFN_DOWN(boot_mem_map.map[i].addr + + boot_mem_map.map[i].size); + + if (pagenr >= addr && pagenr < end) + return 1; + } + + return 0; +} + void __init paging_init(void) { - unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0}; - unsigned long max_dma, high, low; + unsigned long zones_size[MAX_NR_ZONES] = { 0, }; + unsigned long max_dma, low; +#ifndef CONFIG_FLATMEM + unsigned long zholes_size[MAX_NR_ZONES] = { 0, }; + unsigned long i, j, pfn; +#endif pagetable_init(); #ifdef CONFIG_HIGHMEM kmap_init(); #endif + kmap_coherent_init(); max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; low = max_low_pfn; - high = highend_pfn; #ifdef CONFIG_ISA if (low < max_dma) @@ -164,41 +368,25 @@ void __init paging_init(void) zones_size[ZONE_DMA] = low; #endif #ifdef CONFIG_HIGHMEM - if (cpu_has_dc_aliases) { - printk(KERN_WARNING "This processor doesn't support highmem."); - if (high - low) - printk(" %ldk highmem ignored", high - low); - printk("\n"); - } else - zones_size[ZONE_HIGHMEM] = high - low; -#endif - - free_area_init(zones_size); -} + zones_size[ZONE_HIGHMEM] = highend_pfn - highstart_pfn; -#define PFN_UP(x) (((x) + PAGE_SIZE - 1) >> PAGE_SHIFT) -#define PFN_DOWN(x) ((x) >> PAGE_SHIFT) - -static inline int page_is_ram(unsigned long pagenr) -{ - int i; - - for (i = 0; i < boot_mem_map.nr_map; i++) { - unsigned long addr, end; - - if (boot_mem_map.map[i].type != BOOT_MEM_RAM) - /* not usable memory */ - continue; - - addr = PFN_UP(boot_mem_map.map[i].addr); - end = PFN_DOWN(boot_mem_map.map[i].addr + - boot_mem_map.map[i].size); - - if (pagenr >= addr && pagenr < end) - return 1; + if (cpu_has_dc_aliases && zones_size[ZONE_HIGHMEM]) { + printk(KERN_WARNING "This processor doesn't support highmem." + " %ldk highmem ignored\n", zones_size[ZONE_HIGHMEM]); + zones_size[ZONE_HIGHMEM] = 0; } +#endif - return 0; +#ifdef CONFIG_FLATMEM + free_area_init(zones_size); +#else + pfn = 0; + for (i = 0; i < MAX_NR_ZONES; i++) + for (j = 0; j < zones_size[i]; j++, pfn++) + if (!page_is_ram(pfn)) + zholes_size[i]++; + free_area_init_node(0, NODE_DATA(0), zones_size, 0, zholes_size); +#endif } static struct kcore_list kcore_mem, kcore_vmalloc; @@ -215,9 +403,9 @@ void __init mem_init(void) #ifdef CONFIG_DISCONTIGMEM #error "CONFIG_HIGHMEM and CONFIG_DISCONTIGMEM dont work together yet" #endif - max_mapnr = num_physpages = highend_pfn; + max_mapnr = highend_pfn; #else - max_mapnr = num_physpages = max_low_pfn; + max_mapnr = max_low_pfn; #endif high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT); @@ -228,9 +416,10 @@ void __init mem_init(void) for (tmp = 0; tmp < max_low_pfn; tmp++) if (page_is_ram(tmp)) { ram++; - if (PageReserved(mem_map+tmp)) + if (PageReserved(pfn_to_page(tmp))) reservedpages++; } + num_physpages = ram; #ifdef CONFIG_HIGHMEM for (tmp = highstart_pfn; tmp < highend_pfn; tmp++) { @@ -244,11 +433,12 @@ void __init mem_init(void) #ifdef CONFIG_LIMITED_DMA set_page_address(page, lowmem_page_address(page)); #endif - set_page_count(page, 1); + init_page_count(page); __free_page(page); totalhigh_pages++; } totalram_pages += totalhigh_pages; + num_physpages += totalhigh_pages; #endif codesize = (unsigned long) &_etext - (unsigned long) &_text; @@ -277,24 +467,29 @@ void __init mem_init(void) } #endif /* !CONFIG_NEED_MULTIPLE_NODES */ -#ifdef CONFIG_BLK_DEV_INITRD -void free_initrd_mem(unsigned long start, unsigned long end) +static void free_init_pages(char *what, unsigned long begin, unsigned long end) { -#ifdef CONFIG_64BIT - /* Switch from KSEG0 to XKPHYS addresses */ - start = (unsigned long)phys_to_virt(CPHYSADDR(start)); - end = (unsigned long)phys_to_virt(CPHYSADDR(end)); -#endif - if (start < end) - printk(KERN_INFO "Freeing initrd memory: %ldk freed\n", - (end - start) >> 10); - - for (; start < end; start += PAGE_SIZE) { - ClearPageReserved(virt_to_page(start)); - set_page_count(virt_to_page(start), 1); - free_page(start); + unsigned long pfn; + + for (pfn = PFN_UP(begin); pfn < PFN_DOWN(end); pfn++) { + struct page *page = pfn_to_page(pfn); + void *addr = phys_to_virt(PFN_PHYS(pfn)); + + ClearPageReserved(page); + init_page_count(page); + memset(addr, POISON_FREE_INITMEM, PAGE_SIZE); + __free_page(page); totalram_pages++; } + printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10); +} + +#ifdef CONFIG_BLK_DEV_INITRD +void free_initrd_mem(unsigned long start, unsigned long end) +{ + free_init_pages("initrd memory", + virt_to_phys((void *)start), + virt_to_phys((void *)end)); } #endif @@ -302,24 +497,14 @@ extern unsigned long prom_free_prom_memory(void); void free_initmem(void) { - unsigned long addr, page, freed; + unsigned long freed; freed = prom_free_prom_memory(); + if (freed) + printk(KERN_INFO "Freeing firmware memory: %ldkb freed\n", + freed >> 10); - addr = (unsigned long) &__init_begin; - while (addr < (unsigned long) &__init_end) { -#ifdef CONFIG_64BIT - page = PAGE_OFFSET | CPHYSADDR(addr); -#else - page = addr; -#endif - ClearPageReserved(virt_to_page(page)); - set_page_count(virt_to_page(page), 1); - free_page(page); - totalram_pages++; - freed += PAGE_SIZE; - addr += PAGE_SIZE; - } - printk(KERN_INFO "Freeing unused kernel memory: %ldk freed\n", - freed >> 10); + free_init_pages("unused kernel memory", + __pa_symbol(&__init_begin), + __pa_symbol(&__init_end)); }