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1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file COPYING in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1995, 1996, 2003 by Ralf Baechle
7 * Copyright (C) 1995, 1996 Andreas Busse
8 * Copyright (C) 1995, 1996 Stoned Elipot
9 * Copyright (C) 1995, 1996 Paul M. Antoine.
10 * Copyright (C) 2009 Zhang Le
11 */
12#ifndef _ASM_BOOTINFO_H
13#define _ASM_BOOTINFO_H
14
15#include <linux/types.h>
16#include <asm/setup.h>
17
18/*
19 * The MACH_ IDs are sort of equivalent to PCI product IDs. As such the
20 * numbers do not necessarily reflect technical relations or similarities
21 * between systems.
22 */
23
24/*
25 * Valid machtype values for group unknown
26 */
27#define MACH_UNKNOWN 0 /* whatever... */
28
29/*
30 * Valid machtype for group DEC
31 */
32#define MACH_DSUNKNOWN 0
33#define MACH_DS23100 1 /* DECstation 2100 or 3100 */
34#define MACH_DS5100 2 /* DECsystem 5100 */
35#define MACH_DS5000_200 3 /* DECstation 5000/200 */
36#define MACH_DS5000_1XX 4 /* DECstation 5000/120, 125, 133, 150 */
37#define MACH_DS5000_XX 5 /* DECstation 5000/20, 25, 33, 50 */
38#define MACH_DS5000_2X0 6 /* DECstation 5000/240, 260 */
39#define MACH_DS5400 7 /* DECsystem 5400 */
40#define MACH_DS5500 8 /* DECsystem 5500 */
41#define MACH_DS5800 9 /* DECsystem 5800 */
42#define MACH_DS5900 10 /* DECsystem 5900 */
43
44/*
45 * Valid machtype for group Mikrotik
46 */
47#define MACH_MIKROTIK_RB532 0 /* Mikrotik RouterBoard 532 */
48#define MACH_MIKROTIK_RB532A 1 /* Mikrotik RouterBoard 532A */
49
50/*
51 * Valid machtype for Loongson family
52 */
53enum loongson2ef_machine_type {
54 MACH_LOONGSON_UNKNOWN,
55 MACH_LEMOTE_FL2E,
56 MACH_LEMOTE_FL2F,
57 MACH_LEMOTE_ML2F7,
58 MACH_LEMOTE_YL2F89,
59 MACH_DEXXON_GDIUM2F10,
60 MACH_LEMOTE_NAS,
61 MACH_LEMOTE_LL2F,
62 MACH_LOONGSON_END
63};
64
65/*
66 * Valid machtype for group INGENIC
67 */
68enum ingenic_machine_type {
69 MACH_INGENIC_UNKNOWN,
70 MACH_INGENIC_JZ4720,
71 MACH_INGENIC_JZ4725,
72 MACH_INGENIC_JZ4725B,
73 MACH_INGENIC_JZ4730,
74 MACH_INGENIC_JZ4740,
75 MACH_INGENIC_JZ4750,
76 MACH_INGENIC_JZ4755,
77 MACH_INGENIC_JZ4760,
78 MACH_INGENIC_JZ4760B,
79 MACH_INGENIC_JZ4770,
80 MACH_INGENIC_JZ4775,
81 MACH_INGENIC_JZ4780,
82 MACH_INGENIC_X1000,
83 MACH_INGENIC_X1000E,
84 MACH_INGENIC_X1830,
85 MACH_INGENIC_X2000,
86 MACH_INGENIC_X2000E,
87 MACH_INGENIC_X2000H,
88 MACH_INGENIC_X2100,
89};
90
91extern char *system_type;
92const char *get_system_type(void);
93
94extern unsigned long mips_machtype;
95
96extern void detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max);
97
98extern void prom_init(void);
99extern void prom_free_prom_memory(void);
100extern void prom_cleanup(void);
101
102extern void free_init_pages(const char *what,
103 unsigned long begin, unsigned long end);
104
105extern void (*free_init_pages_eva)(void *begin, void *end);
106
107/*
108 * Initial kernel command line, usually setup by prom_init()
109 */
110extern char arcs_cmdline[COMMAND_LINE_SIZE];
111
112/*
113 * Registers a0, a1, a2 and a3 as passed to the kernel entry by firmware
114 */
115extern unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
116
117#ifdef CONFIG_USE_OF
118#include <linux/libfdt.h>
119#include <linux/of_fdt.h>
120
121extern char __appended_dtb[];
122
123static inline void *get_fdt(void)
124{
125 if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) ||
126 IS_ENABLED(CONFIG_MIPS_ELF_APPENDED_DTB))
127 if (fdt_magic(&__appended_dtb) == FDT_MAGIC)
128 return &__appended_dtb;
129
130 if (fw_arg0 == -2) /* UHI interface */
131 return (void *)fw_arg1;
132
133 if (IS_ENABLED(CONFIG_BUILTIN_DTB))
134 if (&__dtb_start != &__dtb_end)
135 return &__dtb_start;
136
137 return NULL;
138}
139#endif
140
141/*
142 * Platform memory detection hook called by arch_mem_init()
143 */
144extern void plat_mem_setup(void);
145
146#ifdef CONFIG_SWIOTLB
147/*
148 * Optional platform hook to call swiotlb_setup().
149 */
150extern void plat_swiotlb_setup(void);
151
152#else
153
154static inline void plat_swiotlb_setup(void) {}
155
156#endif /* CONFIG_SWIOTLB */
157
158#ifdef CONFIG_USE_OF
159/**
160 * plat_get_fdt() - Return a pointer to the platform's device tree blob
161 *
162 * This function provides a platform independent API to get a pointer to the
163 * flattened device tree blob. The interface between bootloader and kernel
164 * is not consistent across platforms so it is necessary to provide this
165 * API such that common startup code can locate the FDT.
166 *
167 * This is used by the KASLR code to get command line arguments and random
168 * seed from the device tree. Any platform wishing to use KASLR should
169 * provide this API and select SYS_SUPPORTS_RELOCATABLE.
170 *
171 * Return: Pointer to the flattened device tree blob.
172 */
173extern void *plat_get_fdt(void);
174
175#ifdef CONFIG_RELOCATABLE
176
177/**
178 * plat_fdt_relocated() - Update platform's information about relocated dtb
179 *
180 * This function provides a platform-independent API to set platform's
181 * information about relocated DTB if it needs to be moved due to kernel
182 * relocation occurring at boot.
183 */
184void plat_fdt_relocated(void *new_location);
185
186#endif /* CONFIG_RELOCATABLE */
187#endif /* CONFIG_USE_OF */
188
189#endif /* _ASM_BOOTINFO_H */