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emmc: Use gpt struct and only add valid entries

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Additionally keep track of partition index
This commit is contained in:
CTCaer 2020-04-30 01:29:58 +03:00
parent 51985ed2ca
commit ec53aa86dd
4 changed files with 39 additions and 84 deletions
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27
bootloader/storage/nx_emmc.c
View file

@ -24,28 +24,31 @@
void nx_emmc_gpt_parse(link_t *gpt, sdmmc_storage_t *storage)
{
u8 *buf = (u8 *)malloc(NX_GPT_NUM_BLOCKS * NX_EMMC_BLOCKSIZE);
gpt_t *gpt_buf = (gpt_t *)calloc(NX_GPT_NUM_BLOCKS, NX_EMMC_BLOCKSIZE);
emummc_storage_read(storage, NX_GPT_FIRST_LBA, NX_GPT_NUM_BLOCKS, buf);
emummc_storage_read(storage, NX_GPT_FIRST_LBA, NX_GPT_NUM_BLOCKS, gpt_buf);
gpt_header_t *hdr = (gpt_header_t *)buf;
for (u32 i = 0; i < hdr->num_part_ents; i++)
for (u32 i = 0; i < gpt_buf->header.num_part_ents; i++)
{
gpt_entry_t *ent = (gpt_entry_t *)(buf + (hdr->part_ent_lba - 1) * NX_EMMC_BLOCKSIZE + i * sizeof(gpt_entry_t));
emmc_part_t *part = (emmc_part_t *)calloc(sizeof(emmc_part_t), 1);
part->lba_start = ent->lba_start;
part->lba_end = ent->lba_end;
part->attrs = ent->attrs;
if (gpt_buf->entries[i].lba_start < gpt_buf->header.first_use_lba)
continue;
part->index = i;
part->lba_start = gpt_buf->entries[i].lba_start;
part->lba_end = gpt_buf->entries[i].lba_end;
part->attrs = gpt_buf->entries[i].attrs;
// ASCII conversion. Copy only the LSByte of the UTF-16LE name.
for (u32 i = 0; i < 36; i++)
part->name[i] = ent->name[i];
part->name[36] = 0;
for (u32 j = 0; j < 36; j++)
part->name[j] = gpt_buf->entries[i].name[j];
part->name[35] = 0;
list_append(gpt, &part->link);
}
free(buf);
free(gpt_buf);
}
void nx_emmc_gpt_free(link_t *gpt)

32
bootloader/storage/nx_emmc.h
View file

@ -17,38 +17,9 @@
#ifndef _NX_EMMC_H_
#define _NX_EMMC_H_
#include "sdmmc.h"
#include "../utils/types.h"
#include "../utils/list.h"
#include "sdmmc.h"
typedef struct _gpt_entry_t
{
u8 type_guid[0x10];
u8 part_guid[0x10];
u64 lba_start;
u64 lba_end;
u64 attrs;
u16 name[36];
} gpt_entry_t;
typedef struct _gpt_header_t
{
u64 signature;
u32 revision;
u32 size;
u32 crc32;
u32 res1;
u64 my_lba;
u64 alt_lba;
u64 first_use_lba;
u64 last_use_lba;
u8 disk_guid[0x10];
u64 part_ent_lba;
u32 num_part_ents;
u32 part_ent_size;
u32 part_ents_crc32;
u8 res2[420];
} gpt_header_t;
#define NX_GPT_FIRST_LBA 1
#define NX_GPT_NUM_BLOCKS 33
@ -56,6 +27,7 @@ typedef struct _gpt_header_t
typedef struct _emmc_part_t
{
u32 index;
u32 lba_start;
u32 lba_end;
u64 attrs;

27
nyx/nyx_gui/storage/nx_emmc.c
View file

@ -23,28 +23,31 @@
void nx_emmc_gpt_parse(link_t *gpt, sdmmc_storage_t *storage)
{
u8 *buf = (u8 *)malloc(NX_GPT_NUM_BLOCKS * NX_EMMC_BLOCKSIZE);
gpt_t *gpt_buf = (gpt_t *)calloc(NX_GPT_NUM_BLOCKS, NX_EMMC_BLOCKSIZE);
sdmmc_storage_read(storage, NX_GPT_FIRST_LBA, NX_GPT_NUM_BLOCKS, buf);
sdmmc_storage_read(storage, NX_GPT_FIRST_LBA, NX_GPT_NUM_BLOCKS, gpt_buf);
gpt_header_t *hdr = (gpt_header_t *)buf;
for (u32 i = 0; i < hdr->num_part_ents; i++)
for (u32 i = 0; i < gpt_buf->header.num_part_ents; i++)
{
gpt_entry_t *ent = (gpt_entry_t *)(buf + (hdr->part_ent_lba - 1) * NX_EMMC_BLOCKSIZE + i * sizeof(gpt_entry_t));
emmc_part_t *part = (emmc_part_t *)calloc(sizeof(emmc_part_t), 1);
part->lba_start = ent->lba_start;
part->lba_end = ent->lba_end;
part->attrs = ent->attrs;
if (gpt_buf->entries[i].lba_start < gpt_buf->header.first_use_lba)
continue;
part->index = i;
part->lba_start = gpt_buf->entries[i].lba_start;
part->lba_end = gpt_buf->entries[i].lba_end;
part->attrs = gpt_buf->entries[i].attrs;
// ASCII conversion. Copy only the LSByte of the UTF-16LE name.
for (u32 i = 0; i < 36; i++)
part->name[i] = ent->name[i];
part->name[36] = 0;
for (u32 j = 0; j < 36; j++)
part->name[j] = gpt_buf->entries[i].name[j];
part->name[35] = 0;
list_append(gpt, &part->link);
}
free(buf);
free(gpt_buf);
}
void nx_emmc_gpt_free(link_t *gpt)

37
nyx/nyx_gui/storage/nx_emmc.h
View file

@ -17,38 +17,10 @@
#ifndef _NX_EMMC_H_
#define _NX_EMMC_H_
#include "sdmmc.h"
#include "../libs/fatfs/ff.h"
#include "../utils/types.h"
#include "../utils/list.h"
#include "sdmmc.h"
typedef struct _gpt_entry_t
{
u8 type_guid[0x10];
u8 part_guid[0x10];
u64 lba_start;
u64 lba_end;
u64 attrs;
u16 name[36];
} gpt_entry_t;
typedef struct _gpt_header_t
{
u64 signature;
u32 revision;
u32 size;
u32 crc32;
u32 res1;
u64 my_lba;
u64 alt_lba;
u64 first_use_lba;
u64 last_use_lba;
u8 disk_guid[0x10];
u64 part_ent_lba;
u32 num_part_ents;
u32 part_ent_size;
u32 part_ents_crc32;
u8 res2[420];
} gpt_header_t;
#define NX_GPT_FIRST_LBA 1
#define NX_GPT_NUM_BLOCKS 33
@ -56,6 +28,7 @@ typedef struct _gpt_header_t
typedef struct _emmc_part_t
{
u32 index;
u32 lba_start;
u32 lba_end;
u64 attrs;
@ -63,6 +36,10 @@ typedef struct _emmc_part_t
link_t link;
} emmc_part_t;
sdmmc_t emmc_sdmmc;
sdmmc_storage_t emmc_storage;
FATFS emmc_fs;
void nx_emmc_gpt_parse(link_t *gpt, sdmmc_storage_t *storage);
void nx_emmc_gpt_free(link_t *gpt);
emmc_part_t *nx_emmc_part_find(link_t *gpt, const char *name);