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x86: zboot: Set environment variables for image locations

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At present it is not possible to tell from a script where the setup block
is, or where the image was loaded to. Add environment variables for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-09-05 14:50:48 -06:00 committed by Bin Meng
parent 3e59759324
commit 126f47c3b8
2 changed files with 7 additions and 0 deletions
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4
README
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@ -3425,6 +3425,10 @@ List of environment variables (most likely not complete):
mempos - Index position of the last match found by the 'ms' command,
in units of the size (.b, .w, .l) of the search
zbootbase - (x86 only) Base address of the bzImage 'setup' block
zbootaddr - (x86 only) Address of the loaded bzImage, typically
BZIMAGE_LOAD_ADDR which is 0x100000
The following image location variables contain the location of images
used in booting. The "Image" column gives the role of the image and is

3
arch/x86/lib/zimage.c
View File

@ -382,6 +382,9 @@ static int do_zboot_load(struct cmd_tbl *cmdtp, int flag, int argc,
return CMD_RET_FAILURE;
}
state.base_ptr = base_ptr;
if (env_set_hex("zbootbase", (ulong)base_ptr) ||
env_set_hex("zbootaddr", state.load_address))
return CMD_RET_FAILURE;
return 0;
}