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Code Issues Releases Activity

diskio: Alloc xts enc, don't realloc sector cache

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shchmue 2019-10-25 11:43:11 -06:00
parent b468026540
commit 2d4ffd2965
1 changed files with 8 additions and 7 deletions
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13
source/libs/fatfs/diskio.c
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@ -107,7 +107,7 @@ static inline int _emmc_xts(u32 ks1, u32 ks2, u32 enc, u8 *tweak, bool regen_twe
pdst += 0x10; pdst += 0x10;
} }
se_aes_crypt_ecb(ks2, 0, dst, secsize, src, secsize); se_aes_crypt_ecb(ks2, enc, dst, secsize, src, secsize);
pdst = (u8 *)dst; pdst = (u8 *)dst;
@ -150,11 +150,10 @@ DRESULT disk_read (
__attribute__ ((aligned (16))) static u8 tweak[0x10]; __attribute__ ((aligned (16))) static u8 tweak[0x10];
__attribute__ ((aligned (16))) static u64 prev_cluster = -1; __attribute__ ((aligned (16))) static u64 prev_cluster = -1;
__attribute__ ((aligned (16))) static u32 prev_sector = 0; __attribute__ ((aligned (16))) static u32 prev_sector = 0;
u32 tweak_exp = 0; bool needs_cache_sector = false;
bool regen_tweak = true, cache_sector = false;
if (secindex == 0 || clear_sector_cache) { if (secindex == 0 || clear_sector_cache) {
free(sector_cache); if (!sector_cache)
sector_cache = (sector_cache_t *)malloc(sizeof(sector_cache_t) * MAX_SEC_CACHE_ENTRIES); sector_cache = (sector_cache_t *)malloc(sizeof(sector_cache_t) * MAX_SEC_CACHE_ENTRIES);
clear_sector_cache = false; clear_sector_cache = false;
secindex = 0; secindex = 0;
@ -176,12 +175,14 @@ DRESULT disk_read (
if (s == secindex && s < MAX_SEC_CACHE_ENTRIES) { if (s == secindex && s < MAX_SEC_CACHE_ENTRIES) {
sector_cache[s].sector = sector; sector_cache[s].sector = sector;
sector_cache[s].visit_count++; sector_cache[s].visit_count++;
cache_sector = true; needs_cache_sector = true;
secindex++; secindex++;
} }
} }
if (nx_emmc_part_read(&storage, system_part, sector, count, buff)) { if (nx_emmc_part_read(&storage, system_part, sector, count, buff)) {
u32 tweak_exp = 0;
bool regen_tweak = true;
if (prev_cluster != sector / 0x20) { // sector in different cluster than last read if (prev_cluster != sector / 0x20) { // sector in different cluster than last read
prev_cluster = sector / 0x20; prev_cluster = sector / 0x20;
tweak_exp = sector % 0x20; tweak_exp = sector % 0x20;
@ -194,7 +195,7 @@ DRESULT disk_read (
// fatfs will never pull more than a cluster // fatfs will never pull more than a cluster
_emmc_xts(9, 8, 0, tweak, regen_tweak, tweak_exp, prev_cluster, buff, buff, count * 0x200); _emmc_xts(9, 8, 0, tweak, regen_tweak, tweak_exp, prev_cluster, buff, buff, count * 0x200);
if (cache_sector) { if (needs_cache_sector) {
memcpy(sector_cache[s].cached_sector, buff, 0x200); memcpy(sector_cache[s].cached_sector, buff, 0x200);
memcpy(sector_cache[s].tweak, tweak, 0x10); memcpy(sector_cache[s].tweak, tweak, 0x10);
} }