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x86: zboot: Add a 'go' subcommand

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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@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 14:50:44 -06:00 committed by Bin Meng
parent 5588e776b0
commit 88f1cd6c2a
1 changed files with 25 additions and 4 deletions
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29
arch/x86/lib/zimage.c
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@ -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)) {
@ -375,14 +380,28 @@ 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;
}
/* Note: This defines the complete_zboot() function */
U_BOOT_SUBCMDS(zboot,
U_BOOT_CMD_MKENT(start, 6, 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,
@ -421,7 +440,8 @@ 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;
}
@ -438,6 +458,7 @@ U_BOOT_CMDREP_COMPLETE(
" initrd size - The size of the initrd image to use, if any.\n"
"\n"
"Sub-commands to do part of the zboot sequence:\n"
"\tstart [addr [arg ...]] - specify arguments\n",
"\tstart [addr [arg ...]] - specify arguments\n"
"\tgo - start OS\n",
complete_zboot
);