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-rw-r--r--recovery/bootloader.c367
1 files changed, 0 insertions, 367 deletions
diff --git a/recovery/bootloader.c b/recovery/bootloader.c
deleted file mode 100644
index afe13a7..0000000
--- a/recovery/bootloader.c
+++ /dev/null
@@ -1,367 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <linux/fs.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include "bootloader.h"
-
-#define SECTOR_SIZE 512
-#define NUM_SECONDARY_GPT_SECTORS 34
-#define PIT_PARTITION_TABLE_SIZE 0x1000 // 4KB
-#define BOOT_PART_LEN 0x20000 // 128KB
-#define SBL_OFFSET (PIT_PARTITION_TABLE_SIZE + (BOOT_PART_LEN * 4))
-
-#define SMALL_BUFFER_SIZE 0x20
-
-// A combination of these defines the specification of the device.
-#define OMAP4460 0x1
-#define OMAP4430 0x2
-#define CHIP_HS 0x4
-#define CHIP_EMU 0x8
-#define MSV_PROD 0x10
-
-// Location of the PIT partition table in EMMC
-#define PIT_PARTITION_TABLE_LOCATION 0x4400
-
-static const char* FAMILY_LOCATION = "/sys/board_properties/soc/family";
-static const char* TYPE_LOCATION = "/sys/board_properties/soc/type";
-static const char* MSV_LOCATION = "/sys/board_properties/soc/msv";
-
-static const char* MMC_LOCATION = "/dev/block/mmcblk0";
-
-/* pit structure = header + (pit partition info * n) */
-struct pit_header {
- unsigned int magic;
- int count; /* onenand + mmc partitions */
- int dummy[5];
-} __attribute__((packed));
-
-struct pit_partinfo {
- int binary; /* BINARY_TYPE_ */
- int device; /* PARTITION_DEV_TYPE_ */
- int id; /* partition id */
- int attribute; /* PARTITION_ATTR_ */
- int update; /* PARTITION_UPDATE_ATTR_ - dedicated. */
- unsigned int blksize; /* mmc start sector */
- unsigned int blklen; /* sector count */
- unsigned int offset; /* file offset (in TAR) */
- unsigned int filesize; /* file size */
- char name[32]; /* partition name */
- char filename[32]; /* file name */
- char deltaname[32]; /* delta file name - dedicated. */
-} __attribute__((packed));
-
-unsigned int read_whole_file(const char* fname, char* buffer,
- int buffer_size) {
- memset(buffer, 0, buffer_size);
-
- FILE* f = fopen(fname, "rb");
- if (f == NULL) {
- fprintf(stderr, "Cannot open %s!\n", fname);
- return -1;
- }
-
- int read_byte_count = fread(buffer, 1, buffer_size - 1, f);
- fclose(f);
- if (read_byte_count < 0) {
- fprintf(stderr, "Couldn't read %s\n", fname);
- return -1;
- }
-
- // Remove any newlines at the end.
- while (buffer[read_byte_count - 1] == '\n') {
- buffer[--read_byte_count] = 0;
- }
-
- return 0;
-}
-
-// Get the specifications for this device
-int get_specification() {
- int spec = 0;
-
- char file_data[SMALL_BUFFER_SIZE];
-
- if (read_whole_file(FAMILY_LOCATION, file_data, SMALL_BUFFER_SIZE) == 0) {
- if (strcmp(file_data, "OMAP4430") == 0) {
- spec |= OMAP4430;
- } else if (strcmp(file_data, "OMAP4460") == 0) {
- spec |= OMAP4460;
- } else {
- fprintf(stderr, "Unknown family: %s\n", file_data);
- return -1;
- }
- } else {
- fprintf(stderr, "No family\n");
- return -1;
- }
-
- if (read_whole_file(TYPE_LOCATION, file_data, SMALL_BUFFER_SIZE) == 0) {
- if (strcmp(file_data, "HS") == 0) {
- spec |= CHIP_HS;
- } else if (strcmp(file_data, "EMU") == 0) {
- spec |= CHIP_EMU;
- } else {
- fprintf(stderr, "Unknown chip type: %s\n", file_data);
- return -1;
- }
- } else {
- fprintf(stderr, "No chip type\n");
- return -1;
- }
-
- // MSV is either prod (non-zero) or eng (zero). Default to eng.
- if (read_whole_file(MSV_LOCATION, file_data, SMALL_BUFFER_SIZE) == 0) {
- if (strtoul(file_data, NULL, 16) != 0) {
- spec |= MSV_PROD;
- }
- } else {
- fprintf(stderr, "No msv\n");
- }
-
- return spec;
-}
-
-
-// Four different xloaders are supported by bootloader.img:
-// 4460 EMU, 4460 HS (eng), 4460 HS (prod), 4430 HS.
-// The layout of the bootloader.img is:
-//
-// PIT Partition table (4KB)
-// 4460 EMU xloader (128KB)
-// 4460 HS (eng) xloader (128KB)
-// 4460 HS (prod) xloader (128KB)
-// 4430 HS xloader(128KB)
-// sbl (the rest)
-int get_xloader_offset() {
- int spec = get_specification();
-
- if (spec < 0) {
- return -1;
- }
-
- if (spec & OMAP4460 &&
- spec & CHIP_EMU) {
- return 0;
- } else if (spec & OMAP4460 &&
- spec & CHIP_HS &&
- !(spec & MSV_PROD)) {
- return BOOT_PART_LEN;
- } else if (spec & OMAP4460 &&
- spec & CHIP_HS &&
- spec & MSV_PROD) {
- return BOOT_PART_LEN * 2;
- } else if (spec & OMAP4430 &&
- spec & CHIP_HS) {
- return BOOT_PART_LEN * 3;
- }
-
- fprintf(stderr, "Unsupported spec for bootloader.img: %d", spec);
- return -1;
-}
-
-int write_pit_partition_table(const char* image_data,
- size_t image_size) {
- int written = 0;
- int close_status = 0;
- int to_write;
- const char* curr;
-
-
- int mmcfd = open(MMC_LOCATION, O_RDWR);
- if (mmcfd < 0) {
- fprintf(stderr, "Could not open %s\n", MMC_LOCATION);
- return -1;
- }
-
- // zero out gpt magic field
- if (lseek(mmcfd, SECTOR_SIZE, SEEK_SET) < 0) {
- fprintf(stderr, "Couldn't seek to the start of sector 1\n");
- close(mmcfd);
- return -1;
- }
-
- char buf[SECTOR_SIZE];
- if (read(mmcfd, buf, SECTOR_SIZE) != SECTOR_SIZE) {
- fprintf(stderr, "Failed to read sector 1\n");
- close(mmcfd);
- return -1;
- }
-
- memset(buf, 0, 8);
-
- if (lseek(mmcfd, SECTOR_SIZE, SEEK_SET) < 0) {
- fprintf(stderr, "Couldn't seek to the start of sector 1, part 2\n");
- close(mmcfd);
- return -1;
- }
-
- to_write = SECTOR_SIZE;
- curr = buf;
- while (to_write > 0) {
- written = write(mmcfd, curr, to_write);
- if (written < 0 && errno != EINTR) {
- fprintf(stderr, "Couldn't overwrite sector 1\n");
- close(mmcfd);
- return -1;
- }
- if (written > 0) {
- to_write -= written;
- curr += written;
- }
- }
-
- // modify the pit partition info to reflect userdata size
- // before writing the pit partition table
- char pit_partition_copy[PIT_PARTITION_TABLE_SIZE];
- memcpy(pit_partition_copy, image_data, PIT_PARTITION_TABLE_SIZE);
-
- struct pit_header* hd = (struct pit_header*) pit_partition_copy;
- int i;
- for (i = 0; i < hd->count; i++) {
- struct pit_partinfo* pi = (struct pit_partinfo*)
- (pit_partition_copy + sizeof(*hd) + sizeof(*pi) * i);
- if (strcmp(pi->name, "userdata") == 0) {
- unsigned int num_sectors;
- if (ioctl(mmcfd, BLKGETSIZE, &num_sectors) < 0) {
- fprintf(stderr, "Couldn't get sector count\n");
- close(mmcfd);
- return -1;
- }
-
- // There are NUM_SECONDARY_GPT_SECTORS sectors reserved at the end of the
- // device to hold a backup copy of the GPT, so we subtract that number.
- pi->blklen = num_sectors - pi->blksize - NUM_SECONDARY_GPT_SECTORS;
- break;
- }
- }
-
- if (i == hd->count) {
- fprintf(stderr, "No userdata partition found\n");
- close(mmcfd);
- return -1;
- }
-
- // copy the modified pit partition table data to the correct location
- if (lseek(mmcfd, PIT_PARTITION_TABLE_LOCATION, SEEK_SET) < 0) {
- fprintf(stderr, "Couldn't seek to the pit partition table location\n");
- close(mmcfd);
- return -1;
- }
-
- to_write = PIT_PARTITION_TABLE_SIZE;
- curr = pit_partition_copy;
- while (to_write > 0) {
- written = write(mmcfd, curr, to_write);
- if (written < 0 && errno != EINTR) {
- fprintf(stderr, "Failed writing pit partition table\n");
- close(mmcfd);
- return -1;
- }
- if (written > 0) {
- to_write -= written;
- curr += written;
- }
- }
-
- if (close(mmcfd) != 0) {
- fprintf(stderr, "Failed to close file\n");
- return -1;
- }
-
- return 0;
-}
-
-int write_xloader(const char* image_data,
- size_t image_size,
- const char* xloader_loc) {
- int xloader_offset = get_xloader_offset();
-
- if (xloader_offset < 0) {
- return -1;
- }
-
- // The offsets into xloader part of the bootloader image
- xloader_offset += PIT_PARTITION_TABLE_SIZE;
-
- FILE* xloader = fopen(xloader_loc, "r+b");
- if (xloader == NULL) {
- fprintf(stderr, "Could not open %s\n", xloader_loc);
- return -1;
- }
-
- // index into the correct xloader offset
- int written = fwrite(image_data+xloader_offset, 1, BOOT_PART_LEN, xloader);
- int close_status = fclose(xloader);
- if (written != BOOT_PART_LEN || close_status != 0) {
- fprintf(stderr, "Failed writing to /xloader\n");
- return -1;
- }
-
- return 0;
-}
-
-int write_sbl(const char* image_data,
- size_t image_size,
- const char* sbl_loc) {
- unsigned int sbl_size = image_size - SBL_OFFSET;
- FILE* sbl = fopen(sbl_loc, "r+b");
- if (sbl == NULL) {
- fprintf(stderr, "Could not open %s\n", sbl_loc);
- return -1;
- }
-
- int written = fwrite(image_data+SBL_OFFSET, 1, sbl_size, sbl);
- int close_status = fclose(sbl);
- if (written != sbl_size || close_status != 0) {
- fprintf(stderr, "Failed writing to /sbl\n");
- return -1;
- }
-
- return 0;
-}
-
-int update_bootloader(const char* image_data,
- size_t image_size,
- const char* xloader_loc,
- const char* sbl_loc) {
- if (image_size < SBL_OFFSET) {
- fprintf(stderr, "image size %d is too small\n", image_size);
- return -1;
- }
-
- if (write_pit_partition_table(image_data, image_size) < 0) {
- return -1;
- }
-
- if (write_xloader(image_data, image_size, xloader_loc) < 0) {
- return -1;
- }
-
- if (write_sbl(image_data, image_size, sbl_loc) < 0) {
- return -1;
- }
-
- return 0;
-}
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