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Diffstat (limited to 'arch/xtensa/mm/cache.c')
-rw-r--r--arch/xtensa/mm/cache.c134
1 files changed, 76 insertions, 58 deletions
diff --git a/arch/xtensa/mm/cache.c b/arch/xtensa/mm/cache.c
index 1a804a2f9a5b..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:
@@ -74,8 +70,10 @@ static inline void kmap_invalidate_coherent(struct page *page,
kvaddr = TLBTEMP_BASE_1 +
(page_to_phys(page) & DCACHE_ALIAS_MASK);
+ preempt_disable();
__invalidate_dcache_page_alias(kvaddr,
page_to_phys(page));
+ preempt_enable();
}
}
}
@@ -83,30 +81,28 @@ static inline void kmap_invalidate_coherent(struct page *page,
static inline void *coherent_kvaddr(struct page *page, unsigned long base,
unsigned long vaddr, unsigned long *paddr)
{
- if (PageHighMem(page) || !DCACHE_ALIAS_EQ(page_to_phys(page), vaddr)) {
- *paddr = page_to_phys(page);
- return (void *)(base + (vaddr & DCACHE_ALIAS_MASK));
- } else {
- *paddr = 0;
- return page_to_virt(page);
- }
+ *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, &page->flags);
+ 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);
@@ -115,14 +111,11 @@ void copy_user_highpage(struct page *dst, struct page *src,
preempt_disable();
kmap_invalidate_coherent(dst, vaddr);
- set_bit(PG_arch_1, &dst->flags);
+ set_bit(PG_arch_1, folio_flags(folio, 0));
copy_page_alias(dst_vaddr, src_vaddr, dst_paddr, src_paddr);
preempt_enable();
}
-
-#endif /* DCACHE_WAY_SIZE > PAGE_SIZE */
-
-#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
+EXPORT_SYMBOL(copy_user_highpage);
/*
* Any time the kernel writes to a user page cache page, or it is about to
@@ -130,9 +123,9 @@ void copy_user_highpage(struct page *dst, struct page *src,
*
*/
-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
@@ -141,14 +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;
@@ -162,21 +155,27 @@ void flush_dcache_page(struct page *page)
if (!alias && !mapping)
return;
- virt = TLBTEMP_BASE_1 + (phys & DCACHE_ALIAS_MASK);
- __flush_invalidate_dcache_page_alias(virt, phys);
+ 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??
@@ -188,6 +187,7 @@ void local_flush_cache_range(struct vm_area_struct *vma,
__flush_invalidate_dcache_all();
__invalidate_icache_all();
}
+EXPORT_SYMBOL(local_flush_cache_range);
/*
* Remove any entry in the cache for this page.
@@ -204,49 +204,61 @@ void local_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);
+ folio = page_folio(pfn_to_page(pfn));
- /* Invalidate old entry in TLBs */
+ /* Invalidate old entries in TLBs */
+ for (i = 0; i < nr; i++)
+ flush_tlb_page(vma, addr + i * PAGE_SIZE);
+ nr = folio_nr_pages(folio);
- flush_tlb_page(vma, addr);
-
-#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
+#if (DCACHE_WAY_SIZE > PAGE_SIZE)
- if (!PageReserved(page) && test_bit(PG_arch_1, &page->flags)) {
- unsigned long phys = page_to_phys(page);
+ if (!folio_test_reserved(folio) && test_bit(PG_arch_1, &folio->flags.f)) {
+ unsigned long phys = folio_pfn(folio) * PAGE_SIZE;
unsigned long tmp;
- 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);
+ 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)kmap_atomic(page);
- __flush_dcache_page(paddr);
- __invalidate_icache_page(paddr);
- set_bit(PG_arch_1, &page->flags);
- kunmap_atomic((void *)paddr);
+ 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
}
@@ -256,7 +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,
@@ -269,7 +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 */
@@ -284,9 +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);
@@ -308,7 +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);
generated by cgit (git 2.34.1) at 2025-12-25 06:55:22 +0000