#ifndef _M68K_CACHEFLUSH_H
#define _M68K_CACHEFLUSH_H
#include <linux/mm.h>
/* cache code */
#define FLUSH_I_AND_D (0x00000808)
#define FLUSH_I (0x00000008)
/*
* Cache handling functions
*/
static inline void flush_icache(void)
{
if (CPU_IS_040_OR_060)
asm volatile ( "nop\n"
" .chip 68040\n"
" cpusha %bc\n"
" .chip 68k");
else {
unsigned long tmp;
asm volatile ( "movec %%cacr,%0\n"
" or.w %1,%0\n"
" movec %0,%%cacr"
: "=&d" (tmp)
: "id" (FLUSH_I));
}
}
/*
* invalidate the cache for the specified memory range.
* It starts at the physical address specified for
* the given number of bytes.
*/
extern void cache_clear(unsigned long paddr, int len);
/*
* push any dirty cache in the specified memory range.
* It starts at the physical address specified for
* the given number of bytes.
*/
extern void cache_push(unsigned long paddr, int len);
/*
* push and invalidate pages in the specified user virtual
* memory range.
*/
extern void cache_push_v(unsigned long vaddr, int len);
/* This is needed whenever the virtual mapping of the current
process changes. */
#define __flush_cache_all() \
({ \
if (CPU_IS_040_OR_060) \
__asm__ __volatile__("nop\n\t" \
".chip 68040\n\t" \
"cpusha %dc\n\t" \
".chip 68k"); \
else { \
unsigned long _tmp; \
__asm__ __volatile__("movec %%cacr,%0\n\t" \
"orw %1,%0\n\t" \
"movec %0,%%cacr" \
: "=&d" (_tmp) \
: "di" (FLUSH_I_AND_D)); \
} \
})
#define __flush_cache_030() \
({ \
if (CPU_IS_020_OR_030) { \
unsigned long _tmp; \
__asm__ __volatile__("movec %%cacr,%0\n\t" \
"orw %1,%0\n\t" \
"movec %0,%%cacr" \
: "=&d" (_tmp) \
: "di" (FLUSH_I_AND_D)); \
} \
})
#define flush_cache_all() __flush_cache_all()
#define flush_cache_vmap(start, end) flush_cache_all()
#define flush_cache_vunmap(start, end) flush_cache_all()
static inline void flush_cache_mm(struct mm_struct *mm)
{
if (mm == current->mm)
__flush_cache_030();
}
#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
/* flush_cache_range/flush_cache_page must be macros to avoid
a dependency on linux/mm.h, which includes this file... */
static inline void flush_cache_range(struct vm_area_struct *vma,
unsigned long start,
unsigned long end)
{
if (vma->vm_mm == current->mm)
__flush_cache_030();
}
static inline void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn)
{
if (vma->vm_mm == current->mm)
__flush_cache_030();
}
/* Push the page at kernel virtual address and clear the icache */
/* RZ: use cpush %bc instead of cpush %dc, cinv %ic */
static inline void __flush_page_to_ram(void *vaddr)
{
if (CPU_IS_040_OR_060) {
__asm__ __volatile__("nop\n\t"
".chip 68040\n\t"
"cpushp %%bc,(%0)\n\t"
".chip 68k"
: : "a" (__pa(vaddr)));
} else {
unsigned long _tmp;
__asm__ __volatile__("movec %%cacr,%0\n\t"
"orw %1,%0\n\t"
"movec %0,%%cacr"
: "=&d" (_tmp)
: "di" (FLUSH_I));
}
}
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
#define flush_dcache_page(page) __flush_page_to_ram(page_address(page))
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
#define flush_icache_page(vma, page) __flush_page_to_ram(page_address(page))
extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
unsigned long addr, int len);
extern void flush_icache_range(unsigned long address, unsigned long endaddr);
static inline void copy_to_user_page(struct vm_area_struct *vma,
struct page *page, unsigned long vaddr,
void *dst, void *src, int len)
{
flush_cache_page(vma, vaddr, page_to_pfn(page));
memcpy(dst, src, len);
flush_icache_user_range(vma, page, vaddr, len);
}
static inline void copy_from_user_page(struct vm_area_struct *vma,
struct page *page, unsigned long vaddr,
void *dst, void *src, int len)
{
flush_cache_page(vma, vaddr, page_to_pfn(page));
memcpy(dst, src, len);
}
#endif /* _M68K_CACHEFLUSH_H */
