[PATCH 08/16] x86: zboot: Add a 'go' subcommand
Simon Glass
sjg at chromium.org
Sat Aug 1 18:08:16 CEST 2020
Split out the code that actually boots linux into a separate sub-command.
Add base_ptr to the state to support this.
Show an error if the boot fails, since this should not happen.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
arch/x86/lib/zimage.c | 26 +++++++++++++++++++++++---
1 file changed, 23 insertions(+), 3 deletions(-)
diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c
index 3d3fe6ec05f..5b096e9b0b0 100644
--- a/arch/x86/lib/zimage.c
+++ b/arch/x86/lib/zimage.c
@@ -54,6 +54,8 @@
* @initrd_size: Size of the initial ramdisk, or 0 if none
* @load_address: Address where the bzImage is moved before booting, either
* BZIMAGE_LOAD_ADDR or ZIMAGE_LOAD_ADDR
+ * @base_ptr: Pointer to the boot parameters, typically at address
+ * DEFAULT_SETUP_BASE
*/
struct zboot_state {
ulong bzimage_addr;
@@ -61,12 +63,14 @@ struct zboot_state {
ulong initrd_addr;
ulong initrd_size;
ulong load_address;
+ struct boot_params *base_ptr;
} state;
enum {
ZBOOT_STATE_START = BIT(0),
+ ZBOOT_STATE_GO = BIT(1),
- ZBOOT_STATE_COUNT = 1,
+ ZBOOT_STATE_COUNT = 2,
};
static void build_command_line(char *command_line, int auto_boot)
@@ -368,6 +372,7 @@ static int do_zboot_start(struct cmd_tbl *cmdtp, int flag, int argc,
puts("## Kernel loading failed ...\n");
return -1;
}
+ state.base_ptr = base_ptr;
if (setup_zimage(base_ptr, (char *)base_ptr + COMMAND_LINE_OFFSET, 0,
state.initrd_addr, state.initrd_size)) {
@@ -375,13 +380,27 @@ static int do_zboot_start(struct cmd_tbl *cmdtp, int flag, int argc,
return -1;
}
+ return 0;
+}
+
+static int do_zboot_go(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ int ret;
+
disable_interrupts();
+
/* we assume that the kernel is in place */
- return boot_linux_kernel((ulong)base_ptr, state.load_address, false);
+ ret = boot_linux_kernel((ulong)state.base_ptr, state.load_address,
+ false);
+ printf("Kernel returned! (err=%d)\n", ret);
+
+ return CMD_RET_FAILURE;
}
U_BOOT_SUBCMDS(zboot,
U_BOOT_CMD_MKENT(start, 8, 1, do_zboot_start, "", ""),
+ U_BOOT_CMD_MKENT(go, 1, 1, do_zboot_go, "", ""),
)
int do_zboot_states(struct cmd_tbl *cmdtp, int flag, int argc,
@@ -420,7 +439,8 @@ int do_zboot_parent(struct cmd_tbl *cmdtp, int flag, int argc,
return do_zboot(cmdtp, flag, argc, argv, repeatable);
}
- do_zboot_states(cmdtp, flag, argc, argv, ZBOOT_STATE_START);
+ do_zboot_states(cmdtp, flag, argc, argv, ZBOOT_STATE_START |
+ ZBOOT_STATE_GO);
return CMD_RET_FAILURE;
}
--
2.28.0.163.g6104cc2f0b6-goog
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