1 /* SPDX-License-Identifier: GPL-2.0+ */
4 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
10 #include <asm/bootparam.h>
13 /* linux i386 zImage/bzImage header. Offsets relative to
14 * the start of the image */
16 #define HEAP_FLAG 0x80
17 #define BIG_KERNEL_FLAG 0x01
20 #define KERNEL_MAGIC 0xaa55
21 #define KERNEL_V2_MAGIC 0x53726448
22 #define COMMAND_LINE_MAGIC 0xA33F
25 #define BZIMAGE_MAX_SIZE 15*1024*1024 /* 15MB */
26 #define ZIMAGE_MAX_SIZE 512*1024 /* 512k */
27 #define SETUP_MAX_SIZE 32768
29 #define SETUP_START_OFFSET 0x200
30 #define BZIMAGE_LOAD_ADDR 0x100000
31 #define ZIMAGE_LOAD_ADDR 0x10000
34 * load_zimage() - Load a zImage or bzImage
36 * This copies an image into the standard location ready for setup
38 * @image: Address of image to load
39 * @kernel_size: Size of kernel including setup block (or 0 if the kernel is
40 * new enough to have a 'syssize' value)
41 * @load_addressp: Returns the address where the kernel has been loaded
42 * Return: address of setup block, or NULL if something went wrong
44 struct boot_params *load_zimage(char *image, unsigned long kernel_size,
45 ulong *load_addressp);
48 * setup_zimage() - Set up a loaded zImage or bzImage ready for booting
50 * @setup_base: Pointer to the boot parameters, typically at address
52 * @cmd_line: Place to put the command line, or NULL to use the one in the setup
54 * @initrd_addr: Address of the initial ramdisk, or 0 if none
55 * @initrd_size: Size of the initial ramdisk, or 0 if none
56 * @load_address: Address where the bzImage is moved before booting, either
57 * BZIMAGE_LOAD_ADDR or ZIMAGE_LOAD_ADDR
58 * @cmdline_force: Address of 'override' command line, or 0 to use the one in
62 int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
63 ulong initrd_addr, ulong initrd_size, ulong cmdline_force);
66 * zimage_dump() - Dump the metadata of a zimage
68 * This shows all available information in a zimage that has been loaded.
70 * @base_ptr: Pointer to the boot parameters, typically at address
73 void zimage_dump(struct boot_params *base_ptr);
76 * zboot_start() - Boot a zimage
78 * Boot a zimage, given the component parts
80 * @addr: Address where the bzImage is moved before booting, either
81 * BZIMAGE_LOAD_ADDR or ZIMAGE_LOAD_ADDR
82 * @base: Pointer to the boot parameters, typically at address
84 * @initrd: Address of the initial ramdisk, or 0 if none
85 * @initrd_size: Size of the initial ramdisk, or 0 if none
86 * @cmdline: Command line to use for booting
87 * Return: -EFAULT on error (normally it does not return)
89 int zboot_start(ulong addr, ulong size, ulong initrd, ulong initrd_size,
90 ulong base, char *cmdline);
93 * zimage_get_kernel_version() - Get the version string from a kernel
95 * @params: boot_params pointer
96 * @kernel_base: base address of kernel
97 * Return: Kernel version as a NUL-terminated string
99 const char *zimage_get_kernel_version(struct boot_params *params,