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#include <linux/mm.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
/*
* Write back the dirty D-caches, but not invalidate them.
*
* START: Virtual Address (U0, P1, or P3)
* SIZE: Size of the region.
*/
void __weak __flush_wback_region(void *start, int size)
{
unsigned long v, cnt, end;
v = (unsigned long)start & ~(L1_CACHE_BYTES-1);
end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
& ~(L1_CACHE_BYTES-1);
cnt = (end - v) / L1_CACHE_BYTES;
while (cnt >= 8) {
asm volatile("ocbwb @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbwb @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbwb @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbwb @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbwb @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbwb @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbwb @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbwb @%0" : : "r" (v));
v += L1_CACHE_BYTES;
cnt -= 8;
}
while (cnt) {
asm volatile("ocbwb @%0" : : "r" (v));
v += L1_CACHE_BYTES;
cnt--;
}
}
/*
* Write back the dirty D-caches and invalidate them.
*
* START: Virtual Address (U0, P1, or P3)
* SIZE: Size of the region.
*/
void __weak __flush_purge_region(void *start, int size)
{
unsigned long v, cnt, end;
v = (unsigned long)start & ~(L1_CACHE_BYTES-1);
end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
& ~(L1_CACHE_BYTES-1);
cnt = (end - v) / L1_CACHE_BYTES;
while (cnt >= 8) {
asm volatile("ocbp @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbp @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbp @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbp @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbp @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbp @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbp @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbp @%0" : : "r" (v));
v += L1_CACHE_BYTES;
cnt -= 8;
}
while (cnt) {
asm volatile("ocbp @%0" : : "r" (v));
v += L1_CACHE_BYTES;
cnt--;
}
}
/*
* No write back please
*/
void __weak __flush_invalidate_region(void *start, int size)
{
unsigned long v, cnt, end;
v = (unsigned long)start & ~(L1_CACHE_BYTES-1);
end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
& ~(L1_CACHE_BYTES-1);
cnt = (end - v) / L1_CACHE_BYTES;
while (cnt >= 8) {
asm volatile("ocbi @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbi @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbi @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbi @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbi @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbi @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbi @%0" : : "r" (v));
v += L1_CACHE_BYTES;
asm volatile("ocbi @%0" : : "r" (v));
v += L1_CACHE_BYTES;
cnt -= 8;
}
while (cnt) {
asm volatile("ocbi @%0" : : "r" (v));
v += L1_CACHE_BYTES;
cnt--;
}
}
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