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fatfs: Add simple GPT support

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This allows for a simple GPT parsing and checking first partition to see if it's FAT based.

This allows hekate booting GPT with tiny size cost.
This commit is contained in:
CTCaer 2021-02-05 23:27:52 +02:00
parent 8b30bd4b57
commit 15a7e49dde
7 changed files with 44 additions and 4 deletions
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14
bdk/libs/fatfs/ff.c
View file

@ -38,6 +38,7 @@
#include "ff.h" /* Declarations of FatFs API */
#include "diskio.h" /* Declarations of device I/O functions */
#include <storage/mbr_gpt.h>
#include <gfx_utils.h>
#define EFSPRINTF(text, ...) print_error(); gfx_printf("%k"text"%k\n", 0xFFFFFF00, 0xFFFFFFFF);
@ -3284,6 +3285,7 @@ static FRESULT find_volume ( /* FR_OK(0): successful, !=0: an error occurred */
/* Following code attempts to mount the volume. (analyze BPB and initialize the filesystem object) */
fs->fs_type = 0; /* Clear the filesystem object */
fs->part_type = 0; /* Clear the Partition object */
fs->pdrv = LD2PD(vol); /* Bind the logical drive and a physical drive */
stat = disk_initialize(fs->pdrv); /* Initialize the physical drive */
if (stat & STA_NOINIT) { /* Check if the initialization succeeded */
@ -3318,6 +3320,18 @@ static FRESULT find_volume ( /* FR_OK(0): successful, !=0: an error occurred */
EFSPRINTF("BRNL");
return FR_DISK_ERR; /* An error occured in the disk I/O layer */
}
#if FF_SIMPLE_GPT
if (fmt >= 2) {
/* If GPT Check the first partition */
gpt_t gpt;
if (disk_read(fs->pdrv, (BYTE *)&gpt, 1, sizeof(gpt_t) / SS(fs))) return FR_DISK_ERR;
if (!mem_cmp(&gpt.header.signature, "EFI PART", 8)) {
fs->part_type = 1;
bsect = gpt.entries[0].lba_start;
fmt = bsect ? check_fs(fs, bsect) : 3; /* Check the partition */
}
}
#endif
if (fmt >= 2) {
EFSPRINTF("NOFAT");
return FR_NO_FILESYSTEM; /* No FAT volume is found */

1
bdk/libs/fatfs/ff.h
View file

@ -97,6 +97,7 @@ typedef DWORD FSIZE_t;
typedef struct {
BYTE win[FF_MAX_SS]; /* Disk access window for Directory, FAT (and file data at tiny cfg) */
BYTE fs_type; /* Filesystem type (0:not mounted) */
BYTE part_type; /* Partition type (0:MBR, 1:GPT) */
BYTE pdrv; /* Associated physical drive */
BYTE n_fats; /* Number of FATs (1 or 2) */
BYTE wflag; /* win[] flag (b0:dirty) */

1
bdk/storage/nx_sd.h
View file

@ -51,6 +51,7 @@ bool sd_initialize(bool power_cycle);
bool sd_mount();
void sd_unmount();
void sd_end();
bool sd_is_gpt();
void *sd_file_read(const char *path, u32 *fsize);
int sd_save_to_file(void *buf, u32 size, const char *filename);

4
bootloader/hos/hos.c
View file

@ -721,6 +721,10 @@ int hos_launch(ini_sec_t *cfg)
goto error;
}
// Check if SD Card is GPT.
if (sd_is_gpt())
_hos_crit_error("SD has GPT only!");
// Read package1 and the correct keyblob.
if (!_read_emmc_pkg1(&ctxt))
goto error;

9
bootloader/libs/fatfs/ffconf.h
View file

@ -46,11 +46,15 @@
/* This option switches fast seek function. (0:Disable or 1:Enable) */
#define FF_FASTFS 0
#if FF_FASTFS
#undef FF_USE_FASTSEEK
#define FF_USE_FASTSEEK 1
#endif
/* This option switches fast access to chained clusters. (0:Disable or 1:Enable) */
#define FF_SIMPLE_GPT 1
/* This option switches support for the first GPT partition. (0:Disable or 1:Enable) */
#define FF_USE_EXPAND 0
@ -185,6 +189,7 @@
/ not defined, a user defined volume string table needs to be defined as:
/
/ const char* VolumeStr[FF_VOLUMES] = {"ram","flash","sd","usb",...
/ Order is important. Any change to order, must also be reflected to diskio drive enum.
*/
@ -246,7 +251,7 @@
#define FF_FS_NORTC 1
#define FF_NORTC_MON 1
#define FF_NORTC_MDAY 1
#define FF_NORTC_YEAR 2020
#define FF_NORTC_YEAR 2021
/* The option FF_FS_NORTC switches timestamp function. If the system does not have
/ any RTC function or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable
/ the timestamp function. Every object modified by FatFs will have a fixed timestamp

5
bootloader/storage/nx_sd.c
View file

@ -180,6 +180,11 @@ static void _sd_deinit()
void sd_unmount() { _sd_deinit(); }
void sd_end() { _sd_deinit(); }
bool sd_is_gpt()
{
return sd_fs.part_type;
}
void *sd_file_read(const char *path, u32 *fsize)
{
FIL fp;

14
nyx/nyx_gui/libs/fatfs/ffconf.h
View file

@ -41,16 +41,25 @@
#define FF_USE_MKFS 1
/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */
#if FF_USE_MKFS
#define FF_MKFS_LABEL "SWITCH SD "
#endif
/* This sets FAT/FAT32 label. Exactly 11 characters, all caps. */
#define FF_USE_FASTSEEK 0
/* This option switches fast seek function. (0:Disable or 1:Enable) */
#define FF_FASTFS 1
#if FF_FASTFS
#undef FF_USE_FASTSEEK
#define FF_USE_FASTSEEK 1
#endif
/* This option switches fast access to chained clusters. (0:Disable or 1:Enable) */
#define FF_SIMPLE_GPT 1
/* This option switches support for the first GPT partition. (0:Disable or 1:Enable) */
#define FF_USE_EXPAND 0
@ -186,6 +195,7 @@
/ not defined, a user defined volume string table needs to be defined as:
/
/ const char* VolumeStr[FF_VOLUMES] = {"ram","flash","sd","usb",...
/ Order is important. Any change to order, must also be reflected to diskio drive enum.
*/
@ -247,7 +257,7 @@
#define FF_FS_NORTC 0
#define FF_NORTC_MON 1
#define FF_NORTC_MDAY 1
#define FF_NORTC_YEAR 2020
#define FF_NORTC_YEAR 2021
/* The option FF_FS_NORTC switches timestamp function. If the system does not have
/ any RTC function or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable
/ the timestamp function. Every object modified by FatFs will have a fixed timestamp