[PATCH 11/16] x86: zboot: Set environment variables for image locations
Simon Glass
sjg at chromium.org
Sat Aug 1 18:08:19 CEST 2020
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 at chromium.org>
---
README | 4 ++++
arch/x86/lib/zimage.c | 3 +++
2 files changed, 7 insertions(+)
diff --git a/README b/README
index d4bf74ce75d..13ac6dd373d 100644
--- a/README
+++ b/README
@@ -3462,6 +3462,10 @@ 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 - Base address of the bzImage 'setup' block
+
+ zbootaddr - 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
diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c
index 49f43721415..4a0a69c8f7c 100644
--- a/arch/x86/lib/zimage.c
+++ b/arch/x86/lib/zimage.c
@@ -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;
}
--
2.28.0.163.g6104cc2f0b6-goog
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