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78 lines
2.3 KiB
C
78 lines
2.3 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 "../mem/heap.h"
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#include "../utils/list.h"
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void nx_emmc_gpt_parse(link_t *gpt, sdmmc_storage_t *storage)
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{
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u8 *buf = (u8 *)malloc(NX_GPT_NUM_BLOCKS * NX_EMMC_BLOCKSIZE);
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sdmmc_storage_read(storage, NX_GPT_FIRST_LBA, NX_GPT_NUM_BLOCKS, buf);
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gpt_header_t *hdr = (gpt_header_t *)buf;
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for (u32 i = 0; i < hdr->num_part_ents; i++)
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{
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gpt_entry_t *ent = (gpt_entry_t *)(buf + (hdr->part_ent_lba - 1) * NX_EMMC_BLOCKSIZE + i * sizeof(gpt_entry_t));
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emmc_part_t *part = (emmc_part_t *)malloc(sizeof(emmc_part_t));
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part->lba_start = ent->lba_start;
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part->lba_end = ent->lba_end;
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part->attrs = ent->attrs;
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//HACK
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for (u32 i = 0; i < 36; i++)
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part->name[i] = ent->name[i];
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part->name[36] = 0;
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list_append(gpt, &part->link);
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}
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free(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 sdmmc_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 sdmmc_storage_write(storage, part->lba_start + sector_off, num_sectors, buf);
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}
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