[U-Boot] [PATCH v1] fastboot: handle flash write to GPT partition

Steve Rae
2014-09-22T21:29:10Z

Implement a feature to allow fastboot to write the downloaded image
to the space reserved for the Protective MBR and the Primary GUID
Partition Table.

Signed-off-by: Steve Rae <srae@broadcom.com>
---
This series depends on:
http://patchwork.ozlabs.org/patch/383184/ (to 388186)

README | 7 +++++++
common/fb_mmc.c | 19 ++++++++++++++++---
2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/README b/README
index e8341b7..2e4e0c4 100644
--- a/README
+++ b/README
@@ -1639,6 +1639,13 @@ The following options need to be configured:
regarding the non-volatile storage device. Define this to
the eMMC device that fastboot should use to store the image.

+ CONFIG_FASTBOOT_GPT_NAME
+ The fastboot "flash" command supports writing the downloaded
+ image to the Protective MBR and the Primary GUID Partition
+ Table. This occurs when the specified "partition name" on the
+ "fastboot flash" command line matches this value.
+ Default is GPT_ENTRY_NAME (currently "gpt") if undefined.
+
- Journaling Flash filesystem support:
CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE,
CONFIG_JFFS2_NAND_DEV
diff --git a/common/fb_mmc.c b/common/fb_mmc.c
index fb06d8a..89fbf23 100644
--- a/common/fb_mmc.c
+++ b/common/fb_mmc.c
@@ -4,12 +4,17 @@
* SPDX-License-Identifier: GPL-2.0+
*/

+#include <config.h>
#include <common.h>
#include <fb_mmc.h>
#include <part.h>
#include <aboot.h>
#include <sparse_format.h>

+#ifndef CONFIG_FASTBOOT_GPT_NAME
+#define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
+#endif
+
/* The 64 defined bytes plus the '\0' */
#define RESPONSE_LEN (64 + 1)

@@ -62,9 +67,9 @@ static void write_raw_image(block_dev_desc_t *dev_desc, disk_partition_t *info,
void fb_mmc_flash_write(const char *cmd, void *download_buffer,
unsigned int download_bytes, char *response)
{
- int ret;
block_dev_desc_t *dev_desc;
disk_partition_t info;
+ lbaint_t blksz;

/* initialize the response buffer */
response_str = response;
@@ -76,8 +81,16 @@ void fb_mmc_flash_write(const char *cmd, void *download_buffer,
return;
}

- ret = get_partition_info_efi_by_name(dev_desc, cmd, &info);
- if (ret) {
+ if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
+ printf("%s: updating GUID Partition Table (including MBR)\n",
+ __func__);
+ /* start at Protective MBR */
+ info.start = (GPT_PRIMARY_PARTITION_TABLE_LBA - 1);
+ blksz = dev_desc->blksz;
+ info.blksz = blksz;
+ /* assume that the Partition Entry Array starts in LBA 2 */
+ info.size = (2 + (GPT_ENTRY_NUMBERS * GPT_ENTRY_SIZE) / blksz);
+ } else if (get_partition_info_efi_by_name(dev_desc, cmd, &info)) {
error("cannot find partition: '%s'\n", cmd);
fastboot_fail("cannot find partition");
return;
--
1.8.5