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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _M68K_CACHEFLUSH_H
#define _M68K_CACHEFLUSH_H
#include <linux/mm.h>
#ifdef CONFIG_COLDFIRE
#include <asm/mcfsim.h>
#endif
/* cache code */
#define FLUSH_I_AND_D (0x00000808)
#define FLUSH_I (0x00000008)
#ifndef ICACHE_MAX_ADDR
#define ICACHE_MAX_ADDR 0
#define ICACHE_SET_MASK 0
#define DCACHE_MAX_ADDR 0
#define DCACHE_SETMASK 0
#endif
#ifndef CACHE_MODE
#define CACHE_MODE 0
#define CACR_ICINVA 0
#define CACR_DCINVA 0
#define CACR_BCINVA 0
#endif
/*
* ColdFire architecture has no way to clear individual cache lines, so we
* are stuck invalidating all the cache entries when we want a clear operation.
*/
static inline void clear_cf_icache(unsigned long start, unsigned long end)
{
__asm__ __volatile__ (
"movec %0,%%cacr\n\t"
"nop"
:
: "r" (CACHE_MODE | CACR_ICINVA | CACR_BCINVA));
}
static inline void clear_cf_dcache(unsigned long start, unsigned long end)
{
__asm__ __volatile__ (
"movec %0,%%cacr\n\t"
"nop"
:
: "r" (CACHE_MODE | CACR_DCINVA));
}
static inline void clear_cf_bcache(unsigned long start, unsigned long end)
{
__asm__ __volatile__ (
"movec %0,%%cacr\n\t"
"nop"
:
: "r" (CACHE_MODE | CACR_ICINVA | CACR_BCINVA | CACR_DCINVA));
}
/*
* Use the ColdFire cpushl instruction to push (and invalidate) cache lines.
* The start and end addresses are cache line numbers not memory addresses.
*/
static inline void flush_cf_icache(unsigned long start, unsigned long end)
{
unsigned long set;
for (set = start; set <= end; set += (0x10 - 3)) {
__asm__ __volatile__ (
"cpushl %%ic,(%0)\n\t"
"addq%.l #1,%0\n\t"
"cpushl %%ic,(%0)\n\t"
"addq%.l #1,%0\n\t"
"cpushl %%ic,(%0)\n\t"
"addq%.l #1,%0\n\t"
"cpushl %%ic,(%0)"
: "=a" (set)
: "a" (set));
}
}
static inline void flush_cf_dcache(unsigned long start, unsigned long end)
{
unsigned long set;
for (set = start; set <= end; set += (0x10 - 3)) {
__asm__ __volatile__ (
"cpushl %%dc,(%0)\n\t"
"addq%.l #1,%0\n\t"
"cpushl %%dc,(%0)\n\t"
"addq%.l #1,%0\n\t"
"cpushl %%dc,(%0)\n\t"
"addq%.l #1,%0\n\t"
"cpushl %%dc,(%0)"
: "=a" (set)
: "a" (set));
}
}
static inline void flush_cf_bcache(unsigned long start, unsigned long end)
{
unsigned long set;
for (set = start; set <= end; set += (0x10 - 3)) {
__asm__ __volatile__ (
"cpushl %%bc,(%0)\n\t"
"addq%.l #1,%0\n\t"
"cpushl %%bc,(%0)\n\t"
"addq%.l #1,%0\n\t"
"cpushl %%bc,(%0)\n\t"
"addq%.l #1,%0\n\t"
"cpushl %%bc,(%0)"
: "=a" (set)
: "a" (set));
}
}
/*
* Cache handling functions
*/
static inline void flush_icache(void)
{
if (CPU_IS_COLDFIRE) {
flush_cf_icache(0, ICACHE_MAX_ADDR);
} else 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_COLDFIRE) { \
flush_cf_dcache(0, DCACHE_MAX_ADDR); \
} else 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_vmap_early(start, end) do { } while (0)
#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_pages_to_ram(void *vaddr, unsigned int nr)
{
if (CPU_IS_COLDFIRE) {
unsigned long addr, start, end;
addr = ((unsigned long) vaddr) & ~(PAGE_SIZE - 1);
start = addr & ICACHE_SET_MASK;
end = (addr + nr * PAGE_SIZE - 1) & ICACHE_SET_MASK;
if (start > end) {
flush_cf_bcache(0, end);
end = ICACHE_MAX_ADDR;
}
flush_cf_bcache(start, end);
} else if (CPU_IS_040_OR_060) {
unsigned long paddr = __pa(vaddr);
do {
__asm__ __volatile__("nop\n\t"
".chip 68040\n\t"
"cpushp %%bc,(%0)\n\t"
".chip 68k"
: : "a" (paddr));
paddr += PAGE_SIZE;
} while (--nr);
} 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_pages_to_ram(page_address(page), 1)
#define flush_dcache_folio(folio) \
__flush_pages_to_ram(folio_address(folio), folio_nr_pages(folio))
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
#define flush_icache_pages(vma, page, nr) \
__flush_pages_to_ram(page_address(page), nr)
extern void flush_icache_user_page(struct vm_area_struct *vma, struct page *page,
unsigned long addr, int len);
extern void flush_icache_range(unsigned long address, unsigned long endaddr);
extern void flush_icache_user_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_page(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 */