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https://github.com/brain-hackers/u-boot-brain
synced 2024-08-17 15:38:51 +09:00
![unsik Kim](/assets/img/avatar_default.png)
Mflash is fusion memory device mainly targeted consumer eletronic and mobile phone. Internally, it have nand flash and other hardware logics and supports some different operation (ATA, IO, XIP) modes. IO mode is custom mode for the host that doesn't have IDE interface. (Many mobile targeted SoC doesn't have IDE bus) This driver support mflash IO mode. Followings are brief descriptions about IO mode. 1. IO mode based on ATA protocol and uses some custom command. (read confirm, write confirm) 2. IO mode uses SRAM bus interface. Signed-off-by: unsik Kim <donari75@gmail.com>
429 lines
12 KiB
C
429 lines
12 KiB
C
/*
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* Copyright (C) 2008 RuggedCom, Inc.
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* Richard Retanubun <RichardRetanubun@RuggedCom.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* Problems with CONFIG_SYS_64BIT_LBA:
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*
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* struct disk_partition.start in include/part.h is sized as ulong.
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* When CONFIG_SYS_64BIT_LBA is activated, lbaint_t changes from ulong to uint64_t.
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* For now, it is cast back to ulong at assignment.
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*
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* This limits the maximum size of addressable storage to < 2 Terra Bytes
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*/
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#include <common.h>
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#include <command.h>
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#include <ide.h>
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#include <malloc.h>
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#include "part_efi.h"
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#if defined(CONFIG_CMD_IDE) || \
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defined(CONFIG_CMD_MG_DISK) || \
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defined(CONFIG_CMD_SATA) || \
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defined(CONFIG_CMD_SCSI) || \
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defined(CONFIG_CMD_USB) || \
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defined(CONFIG_MMC) || \
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defined(CONFIG_SYSTEMACE)
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/* Convert char[2] in little endian format to the host format integer
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*/
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static inline unsigned short le16_to_int(unsigned char *le16)
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{
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return ((le16[1] << 8) + le16[0]);
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}
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/* Convert char[4] in little endian format to the host format integer
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*/
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static inline unsigned long le32_to_int(unsigned char *le32)
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{
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return ((le32[3] << 24) + (le32[2] << 16) + (le32[1] << 8) + le32[0]);
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}
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/* Convert char[8] in little endian format to the host format integer
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*/
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static inline unsigned long long le64_to_int(unsigned char *le64)
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{
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return (((unsigned long long)le64[7] << 56) +
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((unsigned long long)le64[6] << 48) +
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((unsigned long long)le64[5] << 40) +
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((unsigned long long)le64[4] << 32) +
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((unsigned long long)le64[3] << 24) +
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((unsigned long long)le64[2] << 16) +
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((unsigned long long)le64[1] << 8) +
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(unsigned long long)le64[0]);
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}
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/**
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* efi_crc32() - EFI version of crc32 function
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* @buf: buffer to calculate crc32 of
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* @len - length of buf
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*
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* Description: Returns EFI-style CRC32 value for @buf
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*/
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static inline unsigned long efi_crc32(const void *buf, unsigned long len)
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{
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return crc32(0, buf, len);
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}
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/*
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* Private function prototypes
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*/
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static int pmbr_part_valid(struct partition *part);
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static int is_pmbr_valid(legacy_mbr * mbr);
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static int is_gpt_valid(block_dev_desc_t * dev_desc, unsigned long long lba,
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gpt_header * pgpt_head, gpt_entry ** pgpt_pte);
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static gpt_entry *alloc_read_gpt_entries(block_dev_desc_t * dev_desc,
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gpt_header * pgpt_head);
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static int is_pte_valid(gpt_entry * pte);
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/*
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* Public Functions (include/part.h)
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*/
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void print_part_efi(block_dev_desc_t * dev_desc)
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{
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gpt_header gpt_head;
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gpt_entry **pgpt_pte = NULL;
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int i = 0;
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if (!dev_desc) {
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printf("%s: Invalid Argument(s)\n", __FUNCTION__);
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return;
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}
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/* This function validates AND fills in the GPT header and PTE */
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if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
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&(gpt_head), pgpt_pte) != 1) {
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printf("%s: *** ERROR: Invalid GPT ***\n", __FUNCTION__);
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return;
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}
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debug("%s: gpt-entry at 0x%08X\n", __FUNCTION__, (unsigned int)*pgpt_pte);
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printf("Part Start LBA End LBA\n");
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for (i = 0; i < le32_to_int(gpt_head.num_partition_entries); i++) {
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if (is_pte_valid(&(*pgpt_pte)[i])) {
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printf("%s%d 0x%llX 0x%llX\n", GPT_ENTRY_NAME,
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(i + 1),
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le64_to_int((*pgpt_pte)[i].starting_lba),
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le64_to_int((*pgpt_pte)[i].ending_lba));
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} else {
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break; /* Stop at the first non valid PTE */
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}
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}
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/* Remember to free pte */
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if (*pgpt_pte != NULL) {
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debug("%s: Freeing pgpt_pte\n", __FUNCTION__);
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free(*pgpt_pte);
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}
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return;
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}
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int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
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disk_partition_t * info)
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{
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gpt_header gpt_head;
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gpt_entry **pgpt_pte = NULL;
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/* "part" argument must be at least 1 */
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if (!dev_desc || !info || part < 1) {
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printf("%s: Invalid Argument(s)\n", __FUNCTION__);
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return -1;
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}
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/* This function validates AND fills in the GPT header and PTE */
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if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
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&(gpt_head), pgpt_pte) != 1) {
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printf("%s: *** ERROR: Invalid GPT ***\n", __FUNCTION__);
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return -1;
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}
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/* The ulong casting limits the maximum disk size to 2 TB */
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info->start = (ulong) le64_to_int((*pgpt_pte)[part - 1].starting_lba);
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/* The ending LBA is inclusive, to calculate size, add 1 to it */
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info->size = ((ulong)le64_to_int((*pgpt_pte)[part - 1].ending_lba) + 1)
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- info->start;
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info->blksz = GPT_BLOCK_SIZE;
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sprintf((char *)info->name, "%s%d\n", GPT_ENTRY_NAME, part);
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sprintf((char *)info->type, "U-Boot");
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debug("%s: start 0x%lX, size 0x%lX, name %s", __FUNCTION__,
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info->start, info->size, info->name);
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/* Remember to free pte */
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if (*pgpt_pte != NULL) {
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debug("%s: Freeing pgpt_pte\n", __FUNCTION__);
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free(*pgpt_pte);
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}
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return 0;
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}
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int test_part_efi(block_dev_desc_t * dev_desc)
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{
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legacy_mbr legacymbr;
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/* Read legacy MBR from block 0 and validate it */
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if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) & legacymbr) != 1)
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|| (is_pmbr_valid(&legacymbr) != 1)) {
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return -1;
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}
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return 0;
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}
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/*
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* Private functions
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*/
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/*
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* pmbr_part_valid(): Check for EFI partition signature
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*
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* Returns: 1 if EFI GPT partition type is found.
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*/
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static int pmbr_part_valid(struct partition *part)
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{
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if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
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le32_to_int(part->start_sect) == 1UL) {
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return 1;
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}
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return 0;
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}
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/*
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* is_pmbr_valid(): test Protective MBR for validity
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*
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* Returns: 1 if PMBR is valid, 0 otherwise.
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* Validity depends on two things:
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* 1) MSDOS signature is in the last two bytes of the MBR
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* 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
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*/
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static int is_pmbr_valid(legacy_mbr * mbr)
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{
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int i = 0;
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if (!mbr || le16_to_int(mbr->signature) != MSDOS_MBR_SIGNATURE) {
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return 0;
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}
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for (i = 0; i < 4; i++) {
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if (pmbr_part_valid(&mbr->partition_record[i])) {
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return 1;
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}
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}
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return 0;
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}
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/**
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* is_gpt_valid() - tests one GPT header and PTEs for validity
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*
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* lba is the logical block address of the GPT header to test
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* gpt is a GPT header ptr, filled on return.
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* ptes is a PTEs ptr, filled on return.
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*
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* Description: returns 1 if valid, 0 on error.
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* If valid, returns pointers to PTEs.
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*/
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static int is_gpt_valid(block_dev_desc_t * dev_desc, unsigned long long lba,
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gpt_header * pgpt_head, gpt_entry ** pgpt_pte)
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{
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unsigned char crc32_backup[4] = { 0 };
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unsigned long calc_crc32;
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unsigned long long lastlba;
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if (!dev_desc || !pgpt_head) {
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printf("%s: Invalid Argument(s)\n", __FUNCTION__);
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return 0;
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}
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/* Read GPT Header from device */
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if (dev_desc->block_read(dev_desc->dev, lba, 1, pgpt_head) != 1) {
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printf("*** ERROR: Can't read GPT header ***\n");
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return 0;
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}
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/* Check the GPT header signature */
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if (le64_to_int(pgpt_head->signature) != GPT_HEADER_SIGNATURE) {
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printf("GUID Partition Table Header signature is wrong:"
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"0x%llX != 0x%llX\n",
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(unsigned long long)le64_to_int(pgpt_head->signature),
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(unsigned long long)GPT_HEADER_SIGNATURE);
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return 0;
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}
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/* Check the GUID Partition Table CRC */
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memcpy(crc32_backup, pgpt_head->header_crc32, sizeof(crc32_backup));
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memset(pgpt_head->header_crc32, 0, sizeof(pgpt_head->header_crc32));
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calc_crc32 = efi_crc32((const unsigned char *)pgpt_head,
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le32_to_int(pgpt_head->header_size));
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memcpy(pgpt_head->header_crc32, crc32_backup, sizeof(crc32_backup));
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if (calc_crc32 != le32_to_int(crc32_backup)) {
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printf("GUID Partition Table Header CRC is wrong:"
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"0x%08lX != 0x%08lX\n",
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le32_to_int(crc32_backup), calc_crc32);
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return 0;
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}
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/* Check that the my_lba entry points to the LBA that contains the GPT */
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if (le64_to_int(pgpt_head->my_lba) != lba) {
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printf("GPT: my_lba incorrect: %llX != %llX\n",
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(unsigned long long)le64_to_int(pgpt_head->my_lba),
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(unsigned long long)lba);
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return 0;
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}
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/* Check the first_usable_lba and last_usable_lba are within the disk. */
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lastlba = (unsigned long long)dev_desc->lba;
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if (le64_to_int(pgpt_head->first_usable_lba) > lastlba) {
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printf("GPT: first_usable_lba incorrect: %llX > %llX\n",
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le64_to_int(pgpt_head->first_usable_lba), lastlba);
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return 0;
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}
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if (le64_to_int(pgpt_head->last_usable_lba) > lastlba) {
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printf("GPT: last_usable_lba incorrect: %llX > %llX\n",
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le64_to_int(pgpt_head->last_usable_lba), lastlba);
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return 0;
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}
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debug("GPT: first_usable_lba: %llX last_usable_lba %llX last lba %llX\n",
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le64_to_int(pgpt_head->first_usable_lba),
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le64_to_int(pgpt_head->last_usable_lba), lastlba);
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/* Read and allocate Partition Table Entries */
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*pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
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if (*pgpt_pte == NULL) {
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printf("GPT: Failed to allocate memory for PTE\n");
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return 0;
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}
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/* Check the GUID Partition Table Entry Array CRC */
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calc_crc32 = efi_crc32((const unsigned char *)*pgpt_pte,
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le32_to_int(pgpt_head->num_partition_entries) *
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le32_to_int(pgpt_head->sizeof_partition_entry));
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if (calc_crc32 != le32_to_int(pgpt_head->partition_entry_array_crc32)) {
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printf("GUID Partition Table Entry Array CRC is wrong:"
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"0x%08lX != 0x%08lX\n",
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le32_to_int(pgpt_head->partition_entry_array_crc32),
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calc_crc32);
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if (*pgpt_pte != NULL) {
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free(*pgpt_pte);
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}
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return 0;
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}
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/* We're done, all's well */
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return 1;
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}
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/**
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* alloc_read_gpt_entries(): reads partition entries from disk
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* @dev_desc
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* @gpt - GPT header
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*
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* Description: Returns ptes on success, NULL on error.
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* Allocates space for PTEs based on information found in @gpt.
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* Notes: remember to free pte when you're done!
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*/
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static gpt_entry *alloc_read_gpt_entries(block_dev_desc_t * dev_desc,
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gpt_header * pgpt_head)
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{
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size_t count = 0;
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gpt_entry *pte = NULL;
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if (!dev_desc || !pgpt_head) {
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printf("%s: Invalid Argument(s)\n", __FUNCTION__);
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return NULL;
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}
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count = le32_to_int(pgpt_head->num_partition_entries) *
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le32_to_int(pgpt_head->sizeof_partition_entry);
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debug("%s: count = %lu * %lu = %u\n", __FUNCTION__,
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le32_to_int(pgpt_head->num_partition_entries),
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le32_to_int(pgpt_head->sizeof_partition_entry), count);
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/* Allocate memory for PTE, remember to FREE */
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if (count != 0) {
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pte = malloc(count);
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}
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if (count == 0 || pte == NULL) {
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printf("%s: ERROR: Can't allocate 0x%X bytes for GPT Entries\n",
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__FUNCTION__, count);
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return NULL;
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}
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/* Read GPT Entries from device */
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if (dev_desc->block_read (dev_desc->dev,
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(unsigned long)le64_to_int(pgpt_head->partition_entry_lba),
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(lbaint_t) (count / GPT_BLOCK_SIZE), pte)
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!= (count / GPT_BLOCK_SIZE)) {
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printf("*** ERROR: Can't read GPT Entries ***\n");
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free(pte);
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return NULL;
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}
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return pte;
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}
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/**
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* is_pte_valid(): validates a single Partition Table Entry
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* @gpt_entry - Pointer to a single Partition Table Entry
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*
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* Description: returns 1 if valid, 0 on error.
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*/
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static int is_pte_valid(gpt_entry * pte)
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{
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efi_guid_t unused_guid;
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if (!pte) {
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printf("%s: Invalid Argument(s)\n", __FUNCTION__);
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return 0;
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}
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/* Only one validation for now:
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* The GUID Partition Type != Unused Entry (ALL-ZERO)
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*/
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memset(unused_guid.b, 0, sizeof(unused_guid.b));
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if (memcmp(pte->partition_type_guid.b, unused_guid.b,
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sizeof(unused_guid.b)) == 0) {
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debug("%s: Found an unused PTE GUID at 0x%08X\n", __FUNCTION__,
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(unsigned int)pte);
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return 0;
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} else {
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return 1;
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}
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}
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#endif
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