diff options
Diffstat (limited to 'arch/xtensa/mm/cache.c')
| -rw-r--r-- | arch/xtensa/mm/cache.c | 179 |
1 files changed, 130 insertions, 49 deletions
diff --git a/arch/xtensa/mm/cache.c b/arch/xtensa/mm/cache.c index 81edeab82d17..5354df52d61f 100644 --- a/arch/xtensa/mm/cache.c +++ b/arch/xtensa/mm/cache.c @@ -21,20 +21,16 @@ #include <linux/string.h> #include <linux/types.h> #include <linux/ptrace.h> -#include <linux/bootmem.h> +#include <linux/memblock.h> #include <linux/swap.h> #include <linux/pagemap.h> +#include <linux/pgtable.h> #include <asm/bootparam.h> #include <asm/mmu_context.h> #include <asm/tlb.h> #include <asm/tlbflush.h> #include <asm/page.h> -#include <asm/pgalloc.h> -#include <asm/pgtable.h> - -//#define printd(x...) printk(x) -#define printd(x...) do { } while(0) /* * Note: @@ -59,7 +55,67 @@ * */ -#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK +#if (DCACHE_WAY_SIZE > PAGE_SIZE) +static inline void kmap_invalidate_coherent(struct page *page, + unsigned long vaddr) +{ + if (!DCACHE_ALIAS_EQ(page_to_phys(page), vaddr)) { + unsigned long kvaddr; + + if (!PageHighMem(page)) { + kvaddr = (unsigned long)page_to_virt(page); + + __invalidate_dcache_page(kvaddr); + } else { + kvaddr = TLBTEMP_BASE_1 + + (page_to_phys(page) & DCACHE_ALIAS_MASK); + + preempt_disable(); + __invalidate_dcache_page_alias(kvaddr, + page_to_phys(page)); + preempt_enable(); + } + } +} + +static inline void *coherent_kvaddr(struct page *page, unsigned long base, + unsigned long vaddr, unsigned long *paddr) +{ + *paddr = page_to_phys(page); + return (void *)(base + (vaddr & DCACHE_ALIAS_MASK)); +} + +void clear_user_highpage(struct page *page, unsigned long vaddr) +{ + struct folio *folio = page_folio(page); + unsigned long paddr; + void *kvaddr = coherent_kvaddr(page, TLBTEMP_BASE_1, vaddr, &paddr); + + preempt_disable(); + kmap_invalidate_coherent(page, vaddr); + set_bit(PG_arch_1, folio_flags(folio, 0)); + clear_page_alias(kvaddr, paddr); + preempt_enable(); +} +EXPORT_SYMBOL(clear_user_highpage); + +void copy_user_highpage(struct page *dst, struct page *src, + unsigned long vaddr, struct vm_area_struct *vma) +{ + struct folio *folio = page_folio(dst); + unsigned long dst_paddr, src_paddr; + void *dst_vaddr = coherent_kvaddr(dst, TLBTEMP_BASE_1, vaddr, + &dst_paddr); + void *src_vaddr = coherent_kvaddr(src, TLBTEMP_BASE_2, vaddr, + &src_paddr); + + preempt_disable(); + kmap_invalidate_coherent(dst, vaddr); + set_bit(PG_arch_1, folio_flags(folio, 0)); + copy_page_alias(dst_vaddr, src_vaddr, dst_paddr, src_paddr); + preempt_enable(); +} +EXPORT_SYMBOL(copy_user_highpage); /* * Any time the kernel writes to a user page cache page, or it is about to @@ -67,9 +123,9 @@ * */ -void flush_dcache_page(struct page *page) +void flush_dcache_folio(struct folio *folio) { - struct address_space *mapping = page_mapping(page); + struct address_space *mapping = folio_flush_mapping(folio); /* * If we have a mapping but the page is not mapped to user-space @@ -78,14 +134,14 @@ void flush_dcache_page(struct page *page) */ if (mapping && !mapping_mapped(mapping)) { - if (!test_bit(PG_arch_1, &page->flags)) - set_bit(PG_arch_1, &page->flags); + if (!test_bit(PG_arch_1, &folio->flags.f)) + set_bit(PG_arch_1, &folio->flags.f); return; } else { - - unsigned long phys = page_to_phys(page); - unsigned long temp = page->index << PAGE_SHIFT; + unsigned long phys = folio_pfn(folio) * PAGE_SIZE; + unsigned long temp = folio_pos(folio); + unsigned int i, nr = folio_nr_pages(folio); unsigned long alias = !(DCACHE_ALIAS_EQ(temp, phys)); unsigned long virt; @@ -99,31 +155,39 @@ void flush_dcache_page(struct page *page) if (!alias && !mapping) return; - __flush_invalidate_dcache_page((long)page_address(page)); + preempt_disable(); + for (i = 0; i < nr; i++) { + virt = TLBTEMP_BASE_1 + (phys & DCACHE_ALIAS_MASK); + __flush_invalidate_dcache_page_alias(virt, phys); - virt = TLBTEMP_BASE_1 + (temp & DCACHE_ALIAS_MASK); + virt = TLBTEMP_BASE_1 + (temp & DCACHE_ALIAS_MASK); - if (alias) - __flush_invalidate_dcache_page_alias(virt, phys); + if (alias) + __flush_invalidate_dcache_page_alias(virt, phys); - if (mapping) - __invalidate_icache_page_alias(virt, phys); + if (mapping) + __invalidate_icache_page_alias(virt, phys); + phys += PAGE_SIZE; + temp += PAGE_SIZE; + } + preempt_enable(); } /* There shouldn't be an entry in the cache for this page anymore. */ } - +EXPORT_SYMBOL(flush_dcache_folio); /* * For now, flush the whole cache. FIXME?? */ -void flush_cache_range(struct vm_area_struct* vma, +void local_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { __flush_invalidate_dcache_all(); __invalidate_icache_all(); } +EXPORT_SYMBOL(local_flush_cache_range); /* * Remove any entry in the cache for this page. @@ -132,7 +196,7 @@ void flush_cache_range(struct vm_area_struct* vma, * alias versions of the cache flush functions. */ -void flush_cache_page(struct vm_area_struct* vma, unsigned long address, +void local_flush_cache_page(struct vm_area_struct *vma, unsigned long address, unsigned long pfn) { /* Note that we have to use the 'alias' address to avoid multi-hit */ @@ -140,50 +204,61 @@ void flush_cache_page(struct vm_area_struct* vma, unsigned long address, unsigned long phys = page_to_phys(pfn_to_page(pfn)); unsigned long virt = TLBTEMP_BASE_1 + (address & DCACHE_ALIAS_MASK); + preempt_disable(); __flush_invalidate_dcache_page_alias(virt, phys); __invalidate_icache_page_alias(virt, phys); + preempt_enable(); } +EXPORT_SYMBOL(local_flush_cache_page); -#endif +#endif /* DCACHE_WAY_SIZE > PAGE_SIZE */ -void -update_mmu_cache(struct vm_area_struct * vma, unsigned long addr, pte_t *ptep) +void update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep, unsigned int nr) { unsigned long pfn = pte_pfn(*ptep); - struct page *page; + struct folio *folio; + unsigned int i; if (!pfn_valid(pfn)) return; - page = pfn_to_page(pfn); - - /* Invalidate old entry in TLBs */ - - invalidate_itlb_mapping(addr); - invalidate_dtlb_mapping(addr); - -#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK + folio = page_folio(pfn_to_page(pfn)); - if (!PageReserved(page) && test_bit(PG_arch_1, &page->flags)) { + /* Invalidate old entries in TLBs */ + for (i = 0; i < nr; i++) + flush_tlb_page(vma, addr + i * PAGE_SIZE); + nr = folio_nr_pages(folio); - unsigned long paddr = (unsigned long) page_address(page); - unsigned long phys = page_to_phys(page); - unsigned long tmp = TLBTEMP_BASE_1 + (addr & DCACHE_ALIAS_MASK); +#if (DCACHE_WAY_SIZE > PAGE_SIZE) - __flush_invalidate_dcache_page(paddr); + if (!folio_test_reserved(folio) && test_bit(PG_arch_1, &folio->flags.f)) { + unsigned long phys = folio_pfn(folio) * PAGE_SIZE; + unsigned long tmp; - __flush_invalidate_dcache_page_alias(tmp, phys); - __invalidate_icache_page_alias(tmp, phys); + preempt_disable(); + for (i = 0; i < nr; i++) { + tmp = TLBTEMP_BASE_1 + (phys & DCACHE_ALIAS_MASK); + __flush_invalidate_dcache_page_alias(tmp, phys); + tmp = TLBTEMP_BASE_1 + (addr & DCACHE_ALIAS_MASK); + __flush_invalidate_dcache_page_alias(tmp, phys); + __invalidate_icache_page_alias(tmp, phys); + phys += PAGE_SIZE; + } + preempt_enable(); - clear_bit(PG_arch_1, &page->flags); + clear_bit(PG_arch_1, &folio->flags.f); } #else - if (!PageReserved(page) && !test_bit(PG_arch_1, &page->flags) + if (!folio_test_reserved(folio) && !test_bit(PG_arch_1, &folio->flags.f) && (vma->vm_flags & VM_EXEC) != 0) { - unsigned long paddr = (unsigned long) page_address(page); - __flush_dcache_page(paddr); - __invalidate_icache_page(paddr); - set_bit(PG_arch_1, &page->flags); + for (i = 0; i < nr; i++) { + void *paddr = kmap_local_folio(folio, i * PAGE_SIZE); + __flush_dcache_page((unsigned long)paddr); + __invalidate_icache_page((unsigned long)paddr); + kunmap_local(paddr); + } + set_bit(PG_arch_1, &folio->flags.f); } #endif } @@ -193,7 +268,7 @@ update_mmu_cache(struct vm_area_struct * vma, unsigned long addr, pte_t *ptep) * flush_dcache_page() on the page. */ -#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK +#if (DCACHE_WAY_SIZE > PAGE_SIZE) void copy_to_user_page(struct vm_area_struct *vma, struct page *page, unsigned long vaddr, void *dst, const void *src, @@ -206,7 +281,9 @@ void copy_to_user_page(struct vm_area_struct *vma, struct page *page, if (alias) { unsigned long t = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK); + preempt_disable(); __flush_invalidate_dcache_page_alias(t, phys); + preempt_enable(); } /* Copy data */ @@ -221,9 +298,11 @@ void copy_to_user_page(struct vm_area_struct *vma, struct page *page, if (alias) { unsigned long t = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK); + preempt_disable(); __flush_invalidate_dcache_range((unsigned long) dst, len); if ((vma->vm_flags & VM_EXEC) != 0) __invalidate_icache_page_alias(t, phys); + preempt_enable(); } else if ((vma->vm_flags & VM_EXEC) != 0) { __flush_dcache_range((unsigned long)dst,len); @@ -245,7 +324,9 @@ extern void copy_from_user_page(struct vm_area_struct *vma, struct page *page, if (alias) { unsigned long t = TLBTEMP_BASE_1 + (vaddr & DCACHE_ALIAS_MASK); + preempt_disable(); __flush_invalidate_dcache_page_alias(t, phys); + preempt_enable(); } memcpy(dst, src, len); |