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file based bis support

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This commit is contained in:
Christoph Baumann
2025-05-07 12:17:13 +02:00
parent bbe8ddaf66
commit 39b74dd50d
2 changed files with 116 additions and 9 deletions
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124
bdk/storage/nx_emmc_bis.c
View File

@@ -17,6 +17,9 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libs/fatfs/ff.h>
#include <stdlib.h>
#include <storage/nx_emmc_bis.h>
#include <string.h>
#include <memory_map.h>
@@ -57,6 +60,72 @@ static emmc_part_t *system_part = NULL;
static u32 *cache_lookup_tbl = (u32 *)NX_BIS_LOOKUP_ADDR;
static bis_cache_t *bis_cache = (bis_cache_t *)NX_BIS_CACHE_ADDR;
static sdmmc_storage_t *emu_storage = NULL;
static bool file_based = false;
static char file_based_path[0x80];
static u32 file_based_part_sz = 0;
static s32 active_file_idx = -1;
static FIL cur_file;
static int file_based_read_write(u32 sector, u32 num_sectors, void *buf, bool is_write)
{
if(file_based_part_sz == 0){
return 0;
}
int res;
u32 scts_left = num_sectors;
u32 cur_sct = sector;
while(scts_left){
// offset within file
u32 offset = cur_sct % file_based_part_sz;
// read up to start of next file or sectors left, whatever is less
u32 sct_cnt = file_based_part_sz - offset;
sct_cnt = MIN(sct_cnt, scts_left);
u32 file_idx = cur_sct / file_based_part_sz;
if(file_idx != active_file_idx){
if(active_file_idx != -1){
f_close(&cur_file);
}
if(file_idx < 10){
file_based_path[strlen(file_based_path) - 2] = '0';
itoa(file_idx, file_based_path + strlen(file_based_path) - 1, 10);
}else{
itoa(file_idx, file_based_path + strlen(file_based_path) - 2, 10);
}
res = f_open(&cur_file, file_based_path, is_write ? FA_WRITE : FA_READ);
if(res != FR_OK){
return 0;
}
active_file_idx = file_idx;
}
int res;
res = f_lseek(&cur_file, (u64)offset << 9);
if(res != FR_OK){
return 0;
}
if(is_write){
res = f_write(&cur_file, buf + ((u64)(num_sectors - scts_left) << 9), sct_cnt << 9, NULL);
}else{
res = f_read(&cur_file, buf + ((u64)(num_sectors - scts_left) << 9), sct_cnt << 9, NULL);
}
if(res != FR_OK){
return 0;
}
cur_sct += sct_cnt;
scts_left -= sct_cnt;
}
return 1;
}
static int nx_emmc_bis_write_block(u32 sector, u32 count, void *buff, bool flush)
{
@@ -96,10 +165,14 @@ static int nx_emmc_bis_write_block(u32 sector, u32 count, void *buff, bool flush
return 1; // Encryption error.
// If not reading from cache, do a regular read and decrypt.
if (!emu_storage)
res = emmc_part_write(system_part, sector, count, bis_cache->dma_buff);
else
if(emu_storage){
res = sdmmc_storage_write(emu_storage, emu_offset + system_part->lba_start + sector, count, bis_cache->dma_buff);
}else if(file_based){
res = file_based_read_write(system_part->lba_start + sector, count, bis_cache->dma_buff, true);
}else{
res = emmc_part_write(system_part, sector, count, bis_cache->dma_buff);
}
if (!res)
return 1; // R/W error.
@@ -156,10 +229,13 @@ static int nx_emmc_bis_read_block_normal(u32 sector, u32 count, void *buff)
u32 sector_in_cluster = sector % BIS_CLUSTER_SECTORS;
// If not reading from cache, do a regular read and decrypt.
if (!emu_storage)
res = emmc_part_read(system_part, sector, count, bis_cache->dma_buff);
else
if(emu_storage){
res = sdmmc_storage_read(emu_storage, emu_offset + system_part->lba_start + sector, count, bis_cache->dma_buff);
}else if(file_based){
res = file_based_read_write(system_part->lba_start + sector, count, bis_cache->dma_buff, false);
}else{
res = emmc_part_read(system_part, sector, count, bis_cache->dma_buff);
}
if (!res)
return 1; // R/W error.
@@ -213,10 +289,14 @@ static int nx_emmc_bis_read_block_cached(u32 sector, u32 count, void *buff)
cache_lookup_tbl[cluster] = bis_cache->top_idx;
// Read the whole cluster the sector resides in.
if (!emu_storage)
res = emmc_part_read(system_part, cluster_sector, BIS_CLUSTER_SECTORS, bis_cache->dma_buff);
else
if (emu_storage){
res = sdmmc_storage_read(emu_storage, emu_offset + system_part->lba_start + cluster_sector, BIS_CLUSTER_SECTORS, bis_cache->dma_buff);
}else if(file_based){
res = file_based_read_write(system_part->lba_start + cluster_sector, BIS_CLUSTER_SECTORS, bis_cache->dma_buff, false);
}else{
res = emmc_part_read(system_part, cluster_sector, BIS_CLUSTER_SECTORS, bis_cache->dma_buff);
}
if (!res)
return 1; // R/W error.
@@ -320,12 +400,38 @@ void nx_emmc_bis_init(emmc_part_t *part, bool enable_cache, sdmmc_storage_t *sto
system_part = NULL;
}
void nx_emmc_bis_init_file_based(emmc_part_t *part, bool enable_cache, const char *base_path){
strcpy(file_based_path, base_path);
file_based = true;
strcat(file_based_path, "00");
FILINFO fi;
if(f_stat(file_based_path, &fi) == FR_OK){
file_based_part_sz = fi.fsize >> 9;
}else{
file_based_part_sz = 0;
}
nx_emmc_bis_init(part, enable_cache, NULL, 0);
}
void nx_emmc_bis_end()
{
_nx_emmc_bis_flush_cache();
if(file_based){
if(active_file_idx != -1){
f_close(&cur_file);
}
}
system_part = NULL;
emu_storage = NULL;
emu_offset = 0;
file_based_path[0] = '\0';
file_based = false;
active_file_idx = -1;
}
sdmmc_storage_t *nx_emmc_bis_get_storage(){

1
bdk/storage/nx_emmc_bis.h
View File

@@ -231,6 +231,7 @@ int nx_emmc_bis_read(u32 sector, u32 count, void *buff);
int nx_emmc_bis_write(u32 sector, u32 count, void *buff);
// when storage == NULL, use active emummc config, otherwise, access storage at offset
void nx_emmc_bis_init(emmc_part_t *part, bool enable_cache, sdmmc_storage_t *storage, u32 emummc_offset);
void nx_emmc_bis_init_file_based(emmc_part_t *part, bool enable_cache, const char *base_path);
void nx_emmc_bis_end();
sdmmc_storage_t *nx_emmc_bis_get_storage();