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83d290c5 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
2262cfee WD |
2 | /* |
3 | * (C) Copyright 2002 | |
fa82f871 | 4 | * Daniel Engström, Omicron Ceti AB, daniel@omicron.se |
2262cfee WD |
5 | */ |
6 | ||
7 | #ifndef _ASM_ZIMAGE_H_ | |
8 | #define _ASM_ZIMAGE_H_ | |
9 | ||
69370d14 | 10 | #include <asm/bootparam.h> |
233dbc11 GB |
11 | #include <asm/e820.h> |
12 | ||
8bde7f77 | 13 | /* linux i386 zImage/bzImage header. Offsets relative to |
2262cfee WD |
14 | * the start of the image */ |
15 | ||
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16 | #define HEAP_FLAG 0x80 |
17 | #define BIG_KERNEL_FLAG 0x01 | |
18 | ||
19 | /* magic numbers */ | |
20 | #define KERNEL_MAGIC 0xaa55 | |
21 | #define KERNEL_V2_MAGIC 0x53726448 | |
22 | #define COMMAND_LINE_MAGIC 0xA33F | |
23 | ||
24 | /* limits */ | |
25 | #define BZIMAGE_MAX_SIZE 15*1024*1024 /* 15MB */ | |
26 | #define ZIMAGE_MAX_SIZE 512*1024 /* 512k */ | |
27 | #define SETUP_MAX_SIZE 32768 | |
28 | ||
29 | #define SETUP_START_OFFSET 0x200 | |
8bde7f77 | 30 | #define BZIMAGE_LOAD_ADDR 0x100000 |
2262cfee | 31 | #define ZIMAGE_LOAD_ADDR 0x10000 |
8bde7f77 | 32 | |
e4255f45 SG |
33 | enum { |
34 | ZBOOT_STATE_START = BIT(0), | |
35 | ZBOOT_STATE_LOAD = BIT(1), | |
36 | ZBOOT_STATE_SETUP = BIT(2), | |
37 | ZBOOT_STATE_INFO = BIT(3), | |
38 | ZBOOT_STATE_GO = BIT(4), | |
39 | ||
40 | /* This one doesn't execute automatically, so stop the count before 5 */ | |
41 | ZBOOT_STATE_DUMP = BIT(5), | |
42 | ZBOOT_STATE_COUNT = 5, | |
43 | }; | |
44 | ||
45 | /** | |
46 | * struct zboot_state - Current state of the boot | |
47 | * | |
48 | * @bzimage_addr: Address of the bzImage to boot, or 0 if the image has already | |
49 | * been loaded and does not exist (as a cohesive whole) in memory | |
50 | * @bzimage_size: Size of the bzImage, or 0 to detect this | |
51 | * @initrd_addr: Address of the initial ramdisk, or 0 if none | |
52 | * @initrd_size: Size of the initial ramdisk, or 0 if none | |
53 | * @load_address: Address where the bzImage is moved before booting, either | |
54 | * BZIMAGE_LOAD_ADDR or ZIMAGE_LOAD_ADDR | |
55 | * This is set up when loading the zimage | |
56 | * @base_ptr: Pointer to the boot parameters, typically at address | |
57 | * DEFAULT_SETUP_BASE | |
58 | * This is set up when loading the zimage | |
59 | * @cmdline: Environment variable containing the 'override' command line, or | |
60 | * NULL to use the one in the setup block | |
61 | */ | |
62 | struct zboot_state { | |
63 | ulong bzimage_addr; | |
64 | ulong bzimage_size; | |
65 | ulong initrd_addr; | |
66 | ulong initrd_size; | |
67 | ulong load_address; | |
68 | struct boot_params *base_ptr; | |
69 | const char *cmdline; | |
70 | }; | |
71 | ||
72 | extern struct zboot_state state; | |
73 | ||
bade0ac0 SG |
74 | /** |
75 | * zimage_dump() - Dump information about a zimage | |
76 | * | |
77 | * @base_ptr: Pointer to the boot parameters | |
78 | * @show_cmdline: true to show the kernel command line | |
79 | */ | |
80 | void zimage_dump(struct boot_params *base_ptr, bool show_cmdline); | |
81 | ||
82 | /** | |
83 | * zboot_load() - Load a zimage | |
84 | * | |
85 | * Load the zimage into the correct place | |
86 | * | |
87 | * Return: 0 if OK, -ve on error | |
88 | */ | |
89 | int zboot_load(void); | |
90 | ||
91 | /** | |
92 | * zboot_setup() - Set up the zboot image reeady for booting | |
93 | * | |
94 | * Return: 0 if OK, -ve on error | |
95 | */ | |
96 | int zboot_setup(void); | |
97 | ||
98 | /** | |
99 | * zboot_go() - Start the image | |
100 | * | |
101 | * Return: 0 if OK, -ve on error | |
102 | */ | |
103 | int zboot_go(void); | |
104 | ||
4f96023a SG |
105 | /** |
106 | * load_zimage() - Load a zImage or bzImage | |
107 | * | |
108 | * This copies an image into the standard location ready for setup | |
109 | * | |
110 | * @image: Address of image to load | |
111 | * @kernel_size: Size of kernel including setup block (or 0 if the kernel is | |
112 | * new enough to have a 'syssize' value) | |
113 | * @load_addressp: Returns the address where the kernel has been loaded | |
185f812c | 114 | * Return: address of setup block, or NULL if something went wrong |
4f96023a | 115 | */ |
69370d14 | 116 | struct boot_params *load_zimage(char *image, unsigned long kernel_size, |
76539383 | 117 | ulong *load_addressp); |
4f96023a SG |
118 | |
119 | /** | |
120 | * setup_zimage() - Set up a loaded zImage or bzImage ready for booting | |
121 | * | |
122 | * @setup_base: Pointer to the boot parameters, typically at address | |
123 | * DEFAULT_SETUP_BASE | |
124 | * @cmd_line: Place to put the command line, or NULL to use the one in the setup | |
125 | * block | |
126 | * @initrd_addr: Address of the initial ramdisk, or 0 if none | |
127 | * @initrd_size: Size of the initial ramdisk, or 0 if none | |
128 | * @load_address: Address where the bzImage is moved before booting, either | |
129 | * BZIMAGE_LOAD_ADDR or ZIMAGE_LOAD_ADDR | |
130 | * @cmdline_force: Address of 'override' command line, or 0 to use the one in | |
131 | * the * setup block | |
185f812c | 132 | * Return: 0 (always) |
4f96023a | 133 | */ |
69370d14 | 134 | int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot, |
4f96023a SG |
135 | ulong initrd_addr, ulong initrd_size, ulong cmdline_force); |
136 | ||
2262cfee | 137 | #endif |