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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, daniel@omicron.se
*/
#ifndef _ASM_ZIMAGE_H_
#define _ASM_ZIMAGE_H_
#include <asm/bootparam.h>
#include <asm/e820.h>
/* linux i386 zImage/bzImage header. Offsets relative to
* the start of the image */
#define HEAP_FLAG 0x80
#define BIG_KERNEL_FLAG 0x01
/* magic numbers */
#define KERNEL_MAGIC 0xaa55
#define KERNEL_V2_MAGIC 0x53726448
#define COMMAND_LINE_MAGIC 0xA33F
/* limits */
#define BZIMAGE_MAX_SIZE 15*1024*1024 /* 15MB */
#define ZIMAGE_MAX_SIZE 512*1024 /* 512k */
#define SETUP_MAX_SIZE 32768
#define SETUP_START_OFFSET 0x200
#define BZIMAGE_LOAD_ADDR 0x100000
#define ZIMAGE_LOAD_ADDR 0x10000
/**
* load_zimage() - Load a zImage or bzImage
*
* This copies an image into the standard location ready for setup
*
* @image: Address of image to load
* @kernel_size: Size of kernel including setup block (or 0 if the kernel is
* new enough to have a 'syssize' value)
* @load_addressp: Returns the address where the kernel has been loaded
* Return: address of setup block, or NULL if something went wrong
*/
struct boot_params *load_zimage(char *image, unsigned long kernel_size,
ulong *load_addressp);
/**
* setup_zimage() - Set up a loaded zImage or bzImage ready for booting
*
* @setup_base: Pointer to the boot parameters, typically at address
* DEFAULT_SETUP_BASE
* @cmd_line: Place to put the command line, or NULL to use the one in the setup
* block
* @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
* @cmdline_force: Address of 'override' command line, or 0 to use the one in
* the * setup block
* Return: 0 (always)
*/
int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot,
ulong initrd_addr, ulong initrd_size, ulong cmdline_force);
/**
* zimage_dump() - Dump the metadata of a zimage
*
* This shows all available information in a zimage that has been loaded.
*
* @base_ptr: Pointer to the boot parameters, typically at address
* DEFAULT_SETUP_BASE
*/
void zimage_dump(struct boot_params *base_ptr);
#endif
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