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android: add api for loading fdt 

If user get the kernel fdt into the independent partition
which is the ext4 filesystem, we can use this api to load
fdt.

Change-Id: I4fa494beffecb41e8c0e4c02f1e782d0291e2d05
Signed-off-by: Weiwen Chen <cww@rock-chips.com>
This commit is contained in:
Weiwen Chen 2017-11-10 11:32:45 +08:00 committed by Kever Yang
parent bf17c6275d
commit 8ce4d2843d
1 changed files with 62 additions and 0 deletions
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62
common/android_bootloader.c
View File

@ -6,10 +6,12 @@
#include <android_bootloader.h>
#include <android_bootloader_message.h>
#include <android_avb/avb_ops_user.h>
#include <cli.h>
#include <common.h>
#include <malloc.h>
#include <fs.h>
#define ANDROID_PARTITION_BOOT "boot"
#define ANDROID_PARTITION_SYSTEM "system"
@ -158,6 +160,66 @@ static int android_bootloader_boot_bootloader(void)
return -1;
}
static int android_bootloader_get_fdt(const char *part_name,
const char *load_file_name)
{
const char *dev_iface = "mmc";
struct blk_desc *dev_desc;
disk_partition_t boot_part_info;
char *fdt_addr = NULL;
char slot_suffix[5] = {0};
char dev_part[3] = {0};
loff_t bytes = 0;
loff_t pos = 0;
loff_t len_read;
unsigned long addr = 0;
int part_num = -1;
int dev_num = 0;
int ret;
dev_desc = blk_get_dev(dev_iface, dev_num);
if (!dev_desc) {
printf("Could not find %s %d\n", dev_iface, dev_num);
return -1;
}
memset(&boot_part_info, 0, sizeof(boot_part_info));
#ifdef CONFIG_AVB_LIBAVB_USER
if (avb_get_current_slot(slot_suffix)) {
printf("ANDROID: Get Current Slot error.\n");
return -1;
}
part_num = android_part_get_info_by_name_suffix(dev_desc,
part_name,
slot_suffix, &boot_part_info);
#else
part_num = part_get_info_by_name(dev_desc, part_name, &boot_part_info);
if (part_num < 0) {
printf("ANDROID: Could not find partition \"%s\"\n", part_name);
return -1;
}
#endif
snprintf(dev_part, ARRAY_SIZE(dev_part), ":%x", part_num);
if (fs_set_blk_dev(dev_iface, dev_part, FS_TYPE_EXT))
return -1;
fdt_addr = env_get("fdt_addr_r");
if (!fdt_addr) {
printf("ANDROID: No Found FDT Load Address.\n");
return -1;
}
addr = simple_strtoul(fdt_addr, NULL, 16);
ret = fs_read(load_file_name, addr, pos, bytes, &len_read);
if (ret < 0)
return -1;
return 0;
}
int android_bootloader_boot_kernel(unsigned long kernel_address)
{
char kernel_addr_str[12];