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sector buffer in ewram for writing from arm7 (DSi SD fix)

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This commit is contained in:
Dave Murphy 2011-01-28 02:09:07 +00:00
parent 93ec6aad6a
commit 907449094b
3 changed files with 10 additions and 13 deletions
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6
source/disc.c
View File

@ -54,6 +54,7 @@ static const DISC_INTERFACE* get_io_usbstorage (void) {
static const DISC_INTERFACE* get_io_gcsda (void) {
return &__io_gcsda;
}
static const DISC_INTERFACE* get_io_gcsdb (void) {
return &__io_gcsdb;
}
@ -87,7 +88,12 @@ const INTERFACE_ID _FAT_disc_interfaces[] = {
#elif defined (NDS)
#include <nds/arm9/dldi.h>
static const DISC_INTERFACE* get_io_dsisd (void) {
return &__io_dsisd;
}
const INTERFACE_ID _FAT_disc_interfaces[] = {
{"sd", get_io_dsisd},
{"fat", dldiGetInternal},
{NULL, NULL}
};

14
source/partition.c
View File

@ -38,11 +38,6 @@
#include <ctype.h>
#include <sys/iosupport.h>
/*
This device name, as known by devkitPro toolchains
*/
const char* DEVICE_NAME = "fat";
/*
Data offsets
*/
@ -108,6 +103,7 @@ static const char FAT_SIG[3] = {'F', 'A', 'T'};
static const char FS_INFO_SIG1[4] = {'R', 'R', 'a', 'A'};
static const char FS_INFO_SIG2[4] = {'r', 'r', 'A', 'a'};
static uint8_t sectorBuffer[BYTES_PER_READ] __attribute__((aligned(32)));
sec_t FindFirstValidPartition(const DISC_INTERFACE* disc)
{
@ -115,8 +111,6 @@ sec_t FindFirstValidPartition(const DISC_INTERFACE* disc)
uint8_t *ptr;
int i;
uint8_t sectorBuffer[BYTES_PER_READ] = {0};
// Read first sector of disc
if (!_FAT_disc_readSectors (disc, 0, 1, sectorBuffer)) {
return 0;
@ -168,9 +162,9 @@ sec_t FindFirstValidPartition(const DISC_INTERFACE* disc)
return 0;
}
PARTITION* _FAT_partition_constructor (const DISC_INTERFACE* disc, uint32_t cacheSize, uint32_t sectorsPerPage, sec_t startSector) {
PARTITION* partition;
uint8_t sectorBuffer[BYTES_PER_READ] = {0};
// Read first sector of disc
if (!_FAT_disc_readSectors (disc, startSector, 1, sectorBuffer)) {
@ -196,14 +190,14 @@ PARTITION* _FAT_partition_constructor (const DISC_INTERFACE* disc, uint32_t cach
return NULL;
}
}
// Now verify that this is indeed a FAT partition
if (memcmp(sectorBuffer + BPB_FAT16_fileSysType, FAT_SIG, sizeof(FAT_SIG)) &&
memcmp(sectorBuffer + BPB_FAT32_fileSysType, FAT_SIG, sizeof(FAT_SIG)))
{
return NULL;
}
partition = (PARTITION*) _FAT_mem_allocate (sizeof(PARTITION));
if (partition == NULL) {
return NULL;

3
source/partition.h
View File

@ -34,9 +34,6 @@
#include "cache.h"
#include "lock.h"
// Device name
extern const char* DEVICE_NAME;
// Filesystem type
typedef enum {FS_UNKNOWN, FS_FAT12, FS_FAT16, FS_FAT32} FS_TYPE;