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Hardcode buffers, lock sector cache, use fastfs

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shchmue 2020-05-10 13:28:54 -06:00
parent 9130c4b69c
commit 3705b5f228
6 changed files with 325 additions and 57 deletions
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11
source/libs/fatfs/diskio.c
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@ -45,10 +45,11 @@ typedef struct {
u8 cached_sector[0x200];
} sector_cache_t;
#define MAX_SEC_CACHE_ENTRIES 128
static sector_cache_t *sector_cache = NULL;
#define MAX_SEC_CACHE_ENTRIES 256
static sector_cache_t *sector_cache = (sector_cache_t *)(MIXD_BUF_ALIGNED + 0x100000); //NULL;
u32 secindex = 0;
bool clear_sector_cache = false;
bool lock_sector_cache = false;
DSTATUS disk_status (
BYTE pdrv /* Physical drive number to identify the drive */
@ -154,14 +155,14 @@ DRESULT disk_read (
bool needs_cache_sector = false;
if (secindex == 0 || clear_sector_cache) {
if (!sector_cache)
sector_cache = (sector_cache_t *)malloc(sizeof(sector_cache_t) * MAX_SEC_CACHE_ENTRIES);
clear_sector_cache = false;
lock_sector_cache = false;
secindex = 0;
}
u32 s = 0;
if (count == 1) {
// only attempt to cache single-sector reads as these are most likely to be repeated (eg. rereading FAT)
if (!lock_sector_cache && count == 1) {
for ( ; s < secindex; s++) {
if (sector_cache[s].sector == sector) {
sector_cache[s].visit_count++;