diff options
Diffstat (limited to 'arch/x86/include/asm/zimage.h')
| -rw-r--r-- | arch/x86/include/asm/zimage.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/arch/x86/include/asm/zimage.h b/arch/x86/include/asm/zimage.h index 655675b6661..8b542605170 100644 --- a/arch/x86/include/asm/zimage.h +++ b/arch/x86/include/asm/zimage.h @@ -30,6 +30,78 @@ #define BZIMAGE_LOAD_ADDR 0x100000 #define ZIMAGE_LOAD_ADDR 0x10000 +enum { + ZBOOT_STATE_START = BIT(0), + ZBOOT_STATE_LOAD = BIT(1), + ZBOOT_STATE_SETUP = BIT(2), + ZBOOT_STATE_INFO = BIT(3), + ZBOOT_STATE_GO = BIT(4), + + /* This one doesn't execute automatically, so stop the count before 5 */ + ZBOOT_STATE_DUMP = BIT(5), + ZBOOT_STATE_COUNT = 5, +}; + +/** + * struct zboot_state - Current state of the boot + * + * @bzimage_addr: Address of the bzImage to boot, or 0 if the image has already + * been loaded and does not exist (as a cohesive whole) in memory + * @bzimage_size: Size of the bzImage, or 0 to detect this + * @initrd_addr: Address of the initial ramdisk, or 0 if none + * @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 + * This is set up when loading the zimage + * @base_ptr: Pointer to the boot parameters, typically at address + * DEFAULT_SETUP_BASE + * This is set up when loading the zimage + * @cmdline: Environment variable containing the 'override' command line, or + * NULL to use the one in the setup block + */ +struct zboot_state { + ulong bzimage_addr; + ulong bzimage_size; + ulong initrd_addr; + ulong initrd_size; + ulong load_address; + struct boot_params *base_ptr; + const char *cmdline; +}; + +extern struct zboot_state state; + +/** + * zimage_dump() - Dump information about a zimage + * + * @base_ptr: Pointer to the boot parameters + * @show_cmdline: true to show the kernel command line + */ +void zimage_dump(struct boot_params *base_ptr, bool show_cmdline); + +/** + * zboot_load() - Load a zimage + * + * Load the zimage into the correct place + * + * Return: 0 if OK, -ve on error + */ +int zboot_load(void); + +/** + * zboot_setup() - Set up the zboot image reeady for booting + * + * Return: 0 if OK, -ve on error + */ +int zboot_setup(void); + +/** + * zboot_go() - Start the image + * + * Return: 0 if OK, -ve on error + */ +int zboot_go(void); + /** * load_zimage() - Load a zImage or bzImage * @@ -62,4 +134,29 @@ struct boot_params *load_zimage(char *image, unsigned long kernel_size, int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot, ulong initrd_addr, ulong initrd_size, ulong cmdline_force); +/** + * zboot_start() - Prepare to boot a zimage + * + * Record information about a zimage so it can be booted + * + * @bzimage_addr: Address of the bzImage to boot + * @bzimage_size: Size of the bzImage, or 0 to detect this + * @initrd_addr: Address of the initial ramdisk, or 0 if none + * @initrd_size: Size of the initial ramdisk, or 0 if none + * @base_addr: If non-zero, this indicates that the boot parameters have already + * been loaded by the caller to this address, so the load_zimage() call + * in zboot_load() will be skipped when booting + * @cmdline: Environment variable containing the 'override' command line, or + * NULL to use the one in the setup block + */ +void zboot_start(ulong bzimage_addr, ulong bzimage_size, ulong initrd_addr, + ulong initrd_size, ulong base_addr, const char *cmdline); + +/** + * zboot_info() - Show simple info about a zimage + * + * Shows wherer the kernel was loaded and also the setup base + */ +void zboot_info(void); + #endif |