/* Initialize the data cache. */
DCACHE *
dcache_init (void)
{
int csize = sizeof (struct dcache_block) * DCACHE_SIZE;
DCACHE *dcache;
dcache = (DCACHE *) xmalloc (sizeof (*dcache));
dcache->the_cache = (struct dcache_block *) xmalloc (csize);
memset (dcache->the_cache, 0, csize);
dcache_invalidate (dcache);
last_cache = dcache;
return dcache;
}
/*
* Dキャッシュを開始
*/
void
dcache_enable(void)
{
uint32_t bits;
CP15_CONTROL_READ(bits);
/* すでにONならリターン */
if (bits & CP15_CONTROL_C_BIT){
return;
}
dcache_invalidate();
bits |= CP15_CONTROL_C_BIT;
CP15_CONTROL_WRITE(bits);
}
enum target_xfer_status
dcache_read_memory_partial (struct target_ops *ops, DCACHE *dcache,
CORE_ADDR memaddr, gdb_byte *myaddr,
ULONGEST len, ULONGEST *xfered_len)
{
ULONGEST i;
/* If this is a different inferior from what we've recorded,
flush the cache. */
if (! ptid_equal (inferior_ptid, dcache->ptid))
{
dcache_invalidate (dcache);
dcache->ptid = inferior_ptid;
}
for (i = 0; i < len; i++)
{
if (!dcache_peek_byte (dcache, memaddr + i, myaddr + i))
{
/* That failed. Discard its cache line so we don't have a
partially read line. */
dcache_invalidate_line (dcache, memaddr + i);
break;
}
}
if (i == 0)
{
/* Even though reading the whole line failed, we may be able to
read a piece starting where the caller wanted. */
return raw_memory_xfer_partial (ops, myaddr, NULL, memaddr, len,
xfered_len);
}
else
{
*xfered_len = i;
return TARGET_XFER_OK;
}
}
