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-rw-r--r--arch/mips/mm/cache.c139
1 files changed, 107 insertions, 32 deletions
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index 314701a66b1..f7b91d3a371 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -3,13 +3,16 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 1994 - 2003 by Ralf Baechle
+ * Copyright (C) 1994 - 2003, 06, 07 by Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 2007 MIPS Technologies, Inc.
*/
-#include <linux/config.h>
-#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/fcntl.h>
#include <linux/kernel.h>
+#include <linux/linkage.h>
#include <linux/module.h>
#include <linux/sched.h>
+#include <linux/syscalls.h>
#include <linux/mm.h>
#include <asm/cacheflush.h>
@@ -25,18 +28,29 @@ void (*flush_cache_range)(struct vm_area_struct *vma, unsigned long start,
unsigned long end);
void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page,
unsigned long pfn);
-void (*flush_icache_range)(unsigned long __user start,
- unsigned long __user end);
-void (*flush_icache_page)(struct vm_area_struct *vma, struct page *page);
+void (*flush_icache_range)(unsigned long start, unsigned long end);
+EXPORT_SYMBOL_GPL(flush_icache_range);
+void (*local_flush_icache_range)(unsigned long start, unsigned long end);
+EXPORT_SYMBOL_GPL(local_flush_icache_range);
+
+void (*__flush_cache_vmap)(void);
+void (*__flush_cache_vunmap)(void);
+
+void (*__flush_kernel_vmap_range)(unsigned long vaddr, int size);
+EXPORT_SYMBOL_GPL(__flush_kernel_vmap_range);
+void (*__invalidate_kernel_vmap_range)(unsigned long vaddr, int size);
/* MIPS specific cache operations */
void (*flush_cache_sigtramp)(unsigned long addr);
+void (*local_flush_data_cache_page)(void * addr);
void (*flush_data_cache_page)(unsigned long addr);
void (*flush_icache_all)(void);
+EXPORT_SYMBOL_GPL(local_flush_data_cache_page);
EXPORT_SYMBOL(flush_data_cache_page);
+EXPORT_SYMBOL(flush_icache_all);
-#ifdef CONFIG_DMA_NONCOHERENT
+#if defined(CONFIG_DMA_NONCOHERENT) || defined(CONFIG_DMA_MAYBE_COHERENT)
/* DMA cache operations. */
void (*_dma_cache_wback_inv)(unsigned long start, unsigned long size);
@@ -44,17 +58,15 @@ void (*_dma_cache_wback)(unsigned long start, unsigned long size);
void (*_dma_cache_inv)(unsigned long start, unsigned long size);
EXPORT_SYMBOL(_dma_cache_wback_inv);
-EXPORT_SYMBOL(_dma_cache_wback);
-EXPORT_SYMBOL(_dma_cache_inv);
-#endif /* CONFIG_DMA_NONCOHERENT */
+#endif /* CONFIG_DMA_NONCOHERENT || CONFIG_DMA_MAYBE_COHERENT */
/*
* We could optimize the case where the cache argument is not BCACHE but
* that seems very atypical use ...
*/
-asmlinkage int sys_cacheflush(unsigned long __user addr,
- unsigned long bytes, unsigned int cache)
+SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, bytes,
+ unsigned int, cache)
{
if (bytes == 0)
return 0;
@@ -71,6 +83,8 @@ void __flush_dcache_page(struct page *page)
struct address_space *mapping = page_mapping(page);
unsigned long addr;
+ if (PageHighMem(page))
+ return;
if (mapping && !mapping_mapped(mapping)) {
SetPageDcacheDirty(page);
return;
@@ -87,67 +101,128 @@ void __flush_dcache_page(struct page *page)
EXPORT_SYMBOL(__flush_dcache_page);
+void __flush_anon_page(struct page *page, unsigned long vmaddr)
+{
+ unsigned long addr = (unsigned long) page_address(page);
+
+ if (pages_do_alias(addr, vmaddr)) {
+ if (page_mapped(page) && !Page_dcache_dirty(page)) {
+ void *kaddr;
+
+ kaddr = kmap_coherent(page, vmaddr);
+ flush_data_cache_page((unsigned long)kaddr);
+ kunmap_coherent();
+ } else
+ flush_data_cache_page(addr);
+ }
+}
+
+EXPORT_SYMBOL(__flush_anon_page);
+
void __update_cache(struct vm_area_struct *vma, unsigned long address,
pte_t pte)
{
struct page *page;
unsigned long pfn, addr;
+ int exec = (vma->vm_flags & VM_EXEC) && !cpu_has_ic_fills_f_dc;
pfn = pte_pfn(pte);
- if (pfn_valid(pfn) && (page = pfn_to_page(pfn), page_mapping(page)) &&
- Page_dcache_dirty(page)) {
- if (pages_do_alias((unsigned long)page_address(page),
- address & PAGE_MASK)) {
- addr = (unsigned long) page_address(page);
+ if (unlikely(!pfn_valid(pfn)))
+ return;
+ page = pfn_to_page(pfn);
+ if (page_mapping(page) && Page_dcache_dirty(page)) {
+ addr = (unsigned long) page_address(page);
+ if (exec || pages_do_alias(addr, address & PAGE_MASK))
flush_data_cache_page(addr);
- }
-
ClearPageDcacheDirty(page);
}
}
-#define __weak __attribute__((weak))
+unsigned long _page_cachable_default;
+EXPORT_SYMBOL(_page_cachable_default);
-static char cache_panic[] __initdata = "Yeee, unsupported cache architecture.";
+static inline void setup_protection_map(void)
+{
+ if (cpu_has_rixi) {
+ protection_map[0] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ);
+ protection_map[1] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_NO_EXEC);
+ protection_map[2] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ);
+ protection_map[3] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_NO_EXEC);
+ protection_map[4] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_NO_READ);
+ protection_map[5] = __pgprot(_page_cachable_default | _PAGE_PRESENT);
+ protection_map[6] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_NO_READ);
+ protection_map[7] = __pgprot(_page_cachable_default | _PAGE_PRESENT);
+
+ protection_map[8] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_NO_READ);
+ protection_map[9] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_NO_EXEC);
+ protection_map[10] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE | _PAGE_NO_READ);
+ protection_map[11] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE);
+ protection_map[12] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_NO_READ);
+ protection_map[13] = __pgprot(_page_cachable_default | _PAGE_PRESENT);
+ protection_map[14] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_WRITE | _PAGE_NO_READ);
+ protection_map[15] = __pgprot(_page_cachable_default | _PAGE_PRESENT | _PAGE_WRITE);
+
+ } else {
+ protection_map[0] = PAGE_NONE;
+ protection_map[1] = PAGE_READONLY;
+ protection_map[2] = PAGE_COPY;
+ protection_map[3] = PAGE_COPY;
+ protection_map[4] = PAGE_READONLY;
+ protection_map[5] = PAGE_READONLY;
+ protection_map[6] = PAGE_COPY;
+ protection_map[7] = PAGE_COPY;
+ protection_map[8] = PAGE_NONE;
+ protection_map[9] = PAGE_READONLY;
+ protection_map[10] = PAGE_SHARED;
+ protection_map[11] = PAGE_SHARED;
+ protection_map[12] = PAGE_READONLY;
+ protection_map[13] = PAGE_READONLY;
+ protection_map[14] = PAGE_SHARED;
+ protection_map[15] = PAGE_SHARED;
+ }
+}
-void __init cpu_cache_init(void)
+void cpu_cache_init(void)
{
if (cpu_has_3k_cache) {
extern void __weak r3k_cache_init(void);
r3k_cache_init();
- return;
}
if (cpu_has_6k_cache) {
extern void __weak r6k_cache_init(void);
r6k_cache_init();
- return;
}
if (cpu_has_4k_cache) {
extern void __weak r4k_cache_init(void);
r4k_cache_init();
- return;
}
if (cpu_has_8k_cache) {
extern void __weak r8k_cache_init(void);
r8k_cache_init();
- return;
}
if (cpu_has_tx39_cache) {
extern void __weak tx39_cache_init(void);
tx39_cache_init();
- return;
}
- if (cpu_has_sb1_cache) {
- extern void __weak sb1_cache_init(void);
- sb1_cache_init();
- return;
+ if (cpu_has_octeon_cache) {
+ extern void __weak octeon_cache_init(void);
+
+ octeon_cache_init();
}
- panic(cache_panic);
+ setup_protection_map();
+}
+
+int __weak __uncached_access(struct file *file, unsigned long addr)
+{
+ if (file->f_flags & O_DSYNC)
+ return 1;
+
+ return addr >= __pa(high_memory);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 00:24:25 +0000