[PATCH v6 08/16] cmd: bootm: add a stage pre-load
Philippe Reynes
philippe.reynes at softathome.com
Fri Feb 25 15:57:46 CET 2022
Add a stage pre-load to the command bootm.
Right now, this stage may be used to read a
header and check the signature of the full
image.
Reviewed-by: Simon Glass <sjg at chromium.org>
Signed-off-by: Philippe Reynes <philippe.reynes at softathome.com>
---
boot/bootm.c | 33 +++++++++++++++++++++++++++++++++
cmd/Kconfig | 10 ++++++++++
cmd/bootm.c | 2 +-
include/image.h | 1 +
4 files changed, 45 insertions(+), 1 deletion(-)
diff --git a/boot/bootm.c b/boot/bootm.c
index 00c00aef84..714406ab66 100644
--- a/boot/bootm.c
+++ b/boot/bootm.c
@@ -87,6 +87,33 @@ static int bootm_start(struct cmd_tbl *cmdtp, int flag, int argc,
return 0;
}
+static ulong bootm_data_addr(int argc, char *const argv[])
+{
+ ulong addr;
+
+ if (argc > 0)
+ addr = simple_strtoul(argv[0], NULL, 16);
+ else
+ addr = image_load_addr;
+
+ return addr;
+}
+
+static int bootm_pre_load(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ ulong data_addr = bootm_data_addr(argc, argv);
+ int ret = 0;
+
+ if (CONFIG_IS_ENABLED(CMD_BOOTM_PRE_LOAD))
+ ret = image_pre_load(data_addr);
+
+ if (ret)
+ ret = CMD_RET_FAILURE;
+
+ return ret;
+}
+
static int bootm_find_os(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
@@ -677,6 +704,9 @@ int do_bootm_states(struct cmd_tbl *cmdtp, int flag, int argc,
if (states & BOOTM_STATE_START)
ret = bootm_start(cmdtp, flag, argc, argv);
+ if (!ret && (states & BOOTM_STATE_PRE_LOAD))
+ ret = bootm_pre_load(cmdtp, flag, argc, argv);
+
if (!ret && (states & BOOTM_STATE_FINDOS))
ret = bootm_find_os(cmdtp, flag, argc, argv);
@@ -866,6 +896,9 @@ static const void *boot_get_kernel(struct cmd_tbl *cmdtp, int flag, int argc,
&fit_uname_config,
&fit_uname_kernel);
+ if (CONFIG_IS_ENABLED(CMD_BOOTM_PRE_LOAD))
+ img_addr += image_load_offset;
+
bootstage_mark(BOOTSTAGE_ID_CHECK_MAGIC);
/* check image type, for FIT images get FIT kernel node */
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 5e25e45fd2..87aa3fb11a 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -194,6 +194,16 @@ config CMD_BOOTM
help
Boot an application image from the memory.
+config CMD_BOOTM_PRE_LOAD
+ bool "enable pre-load on bootm"
+ depends on CMD_BOOTM
+ depends on IMAGE_PRE_LOAD
+ default n
+ help
+ Enable support of stage pre-load for the bootm command.
+ This stage allow to check or modify the image provided
+ to the bootm command.
+
config BOOTM_EFI
bool "Support booting UEFI FIT images"
depends on CMD_BOOTEFI && CMD_BOOTM && FIT
diff --git a/cmd/bootm.c b/cmd/bootm.c
index e8b7066888..c5de339fba 100644
--- a/cmd/bootm.c
+++ b/cmd/bootm.c
@@ -126,7 +126,7 @@ int do_bootm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
}
return do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_START |
- BOOTM_STATE_FINDOS | BOOTM_STATE_FINDOTHER |
+ BOOTM_STATE_FINDOS | BOOTM_STATE_PRE_LOAD | BOOTM_STATE_FINDOTHER |
BOOTM_STATE_LOADOS |
#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
BOOTM_STATE_RAMDISK |
diff --git a/include/image.h b/include/image.h
index fbcf70f5e4..496b7af3f3 100644
--- a/include/image.h
+++ b/include/image.h
@@ -351,6 +351,7 @@ typedef struct bootm_headers {
#define BOOTM_STATE_OS_PREP (0x00000100)
#define BOOTM_STATE_OS_FAKE_GO (0x00000200) /* 'Almost' run the OS */
#define BOOTM_STATE_OS_GO (0x00000400)
+#define BOOTM_STATE_PRE_LOAD 0x00000800
int state;
#if defined(CONFIG_LMB) && !defined(USE_HOSTCC)
--
2.17.1
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