xref: /openbmc/linux/arch/mips/include/asm/bootinfo.h (revision 14d72af7)
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  */
53 enum 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  */
68 enum 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 
91 extern char *system_type;
92 const char *get_system_type(void);
93 
94 extern unsigned long mips_machtype;
95 
96 extern void detect_memory_region(phys_addr_t start, phys_addr_t sz_min,  phys_addr_t sz_max);
97 
98 extern void prom_init(void);
99 extern void prom_free_prom_memory(void);
100 extern void prom_cleanup(void);
101 
102 extern void free_init_pages(const char *what,
103 			    unsigned long begin, unsigned long end);
104 
105 extern void (*free_init_pages_eva)(void *begin, void *end);
106 
107 /*
108  * Initial kernel command line, usually setup by prom_init()
109  */
110 extern char arcs_cmdline[COMMAND_LINE_SIZE];
111 
112 /*
113  * Registers a0, a1, a2 and a3 as passed to the kernel entry by firmware
114  */
115 extern 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 
121 extern char __appended_dtb[];
122 
get_fdt(void)123 static 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  */
144 extern void plat_mem_setup(void);
145 
146 #ifdef CONFIG_SWIOTLB
147 /*
148  * Optional platform hook to call swiotlb_setup().
149  */
150 extern void plat_swiotlb_setup(void);
151 
152 #else
153 
plat_swiotlb_setup(void)154 static 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  */
173 extern 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  */
184 void plat_fdt_relocated(void *new_location);
185 
186 #endif /* CONFIG_RELOCATABLE */
187 #endif /* CONFIG_USE_OF */
188 
189 #endif /* _ASM_BOOTINFO_H */
190