[PATCH 09/16] x86: zboot: Add an 'info' subcommand
Simon Glass
sjg at chromium.org
Sat Aug 1 18:08:17 CEST 2020
Add a little subcommand that prints out where the kernel was loaded and
its setup pointer. Run it by default in the normal boot.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
arch/x86/lib/zimage.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c
index 5b096e9b0b0..2210ff69b72 100644
--- a/arch/x86/lib/zimage.c
+++ b/arch/x86/lib/zimage.c
@@ -68,9 +68,10 @@ struct zboot_state {
enum {
ZBOOT_STATE_START = BIT(0),
- ZBOOT_STATE_GO = BIT(1),
+ ZBOOT_STATE_INFO = BIT(1),
+ ZBOOT_STATE_GO = BIT(2),
- ZBOOT_STATE_COUNT = 2,
+ ZBOOT_STATE_COUNT = 3,
};
static void build_command_line(char *command_line, int auto_boot)
@@ -383,6 +384,15 @@ static int do_zboot_start(struct cmd_tbl *cmdtp, int flag, int argc,
return 0;
}
+static int do_zboot_info(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ printf("Kernel loaded at %08lx, setup_base=%p\n",
+ state.load_address, state.base_ptr);
+
+ return 0;
+}
+
static int do_zboot_go(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
@@ -400,6 +410,7 @@ static int do_zboot_go(struct cmd_tbl *cmdtp, int flag, int argc,
U_BOOT_SUBCMDS(zboot,
U_BOOT_CMD_MKENT(start, 8, 1, do_zboot_start, "", ""),
+ U_BOOT_CMD_MKENT(info, 1, 1, do_zboot_info, "", ""),
U_BOOT_CMD_MKENT(go, 1, 1, do_zboot_go, "", ""),
)
@@ -440,7 +451,7 @@ int do_zboot_parent(struct cmd_tbl *cmdtp, int flag, int argc,
}
do_zboot_states(cmdtp, flag, argc, argv, ZBOOT_STATE_START |
- ZBOOT_STATE_GO);
+ ZBOOT_STATE_INFO | ZBOOT_STATE_GO);
return CMD_RET_FAILURE;
}
--
2.28.0.163.g6104cc2f0b6-goog
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