mirror of
https://github.com/suchmememanyskill/TegraExplorer.git
synced 2024-12-29 12:56:02 +00:00
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/*
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* Copyright (c) 2018 naehrwert
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include "nx_emmc.h"
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#include "emummc.h"
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#include <mem/heap.h>
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#include <storage/mbr_gpt.h>
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#include <utils/list.h>
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sdmmc_t emmc_sdmmc;
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sdmmc_storage_t emmc_storage;
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FATFS emmc_fs;
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void nx_emmc_gpt_parse(link_t *gpt, sdmmc_storage_t *storage)
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{
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gpt_t *gpt_buf = (gpt_t *)calloc(NX_GPT_NUM_BLOCKS, NX_EMMC_BLOCKSIZE);
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emummc_storage_read(storage, NX_GPT_FIRST_LBA, NX_GPT_NUM_BLOCKS, gpt_buf);
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for (u32 i = 0; i < gpt_buf->header.num_part_ents; i++)
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{
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emmc_part_t *part = (emmc_part_t *)calloc(sizeof(emmc_part_t), 1);
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if (gpt_buf->entries[i].lba_start < gpt_buf->header.first_use_lba)
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continue;
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part->index = i;
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part->lba_start = gpt_buf->entries[i].lba_start;
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part->lba_end = gpt_buf->entries[i].lba_end;
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part->attrs = gpt_buf->entries[i].attrs;
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// ASCII conversion. Copy only the LSByte of the UTF-16LE name.
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for (u32 j = 0; j < 36; j++)
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part->name[j] = gpt_buf->entries[i].name[j];
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part->name[35] = 0;
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list_append(gpt, &part->link);
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}
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free(gpt_buf);
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}
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void nx_emmc_gpt_free(link_t *gpt)
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{
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LIST_FOREACH_SAFE(iter, gpt)
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free(CONTAINER_OF(iter, emmc_part_t, link));
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}
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emmc_part_t *nx_emmc_part_find(link_t *gpt, const char *name)
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{
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LIST_FOREACH_ENTRY(emmc_part_t, part, gpt, link)
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if (!strcmp(part->name, name))
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return part;
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return NULL;
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}
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int nx_emmc_part_read(sdmmc_storage_t *storage, emmc_part_t *part, u32 sector_off, u32 num_sectors, void *buf)
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{
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// The last LBA is inclusive.
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if (part->lba_start + sector_off > part->lba_end)
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return 0;
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return emummc_storage_read(storage, part->lba_start + sector_off, num_sectors, buf);
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}
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int nx_emmc_part_write(sdmmc_storage_t *storage, emmc_part_t *part, u32 sector_off, u32 num_sectors, void *buf)
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{
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// The last LBA is inclusive.
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if (part->lba_start + sector_off > part->lba_end)
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return 0;
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return emummc_storage_write(storage, part->lba_start + sector_off, num_sectors, buf);
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}
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