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_JZ4770, 79 MACH_INGENIC_JZ4775, 80 MACH_INGENIC_JZ4780, 81 MACH_INGENIC_X1000, 82 MACH_INGENIC_X1000E, 83 MACH_INGENIC_X1830, 84 MACH_INGENIC_X2000, 85 MACH_INGENIC_X2000E, 86 }; 87 88 extern char *system_type; 89 const char *get_system_type(void); 90 91 extern unsigned long mips_machtype; 92 93 extern void detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max); 94 95 extern void prom_init(void); 96 extern void prom_free_prom_memory(void); 97 extern void prom_cleanup(void); 98 99 extern void free_init_pages(const char *what, 100 unsigned long begin, unsigned long end); 101 102 extern void (*free_init_pages_eva)(void *begin, void *end); 103 104 /* 105 * Initial kernel command line, usually setup by prom_init() 106 */ 107 extern char arcs_cmdline[COMMAND_LINE_SIZE]; 108 109 /* 110 * Registers a0, a1, a3 and a4 as passed to the kernel entry by firmware 111 */ 112 extern unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; 113 114 #ifdef CONFIG_USE_OF 115 #include <linux/libfdt.h> 116 #include <linux/of_fdt.h> 117 118 extern char __appended_dtb[]; 119 120 static inline void *get_fdt(void) 121 { 122 if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) || 123 IS_ENABLED(CONFIG_MIPS_ELF_APPENDED_DTB)) 124 if (fdt_magic(&__appended_dtb) == FDT_MAGIC) 125 return &__appended_dtb; 126 127 if (fw_arg0 == -2) /* UHI interface */ 128 return (void *)fw_arg1; 129 130 if (IS_ENABLED(CONFIG_BUILTIN_DTB)) 131 if (&__dtb_start != &__dtb_end) 132 return &__dtb_start; 133 134 return NULL; 135 } 136 #endif 137 138 /* 139 * Platform memory detection hook called by arch_mem_init() 140 */ 141 extern void plat_mem_setup(void); 142 143 #ifdef CONFIG_SWIOTLB 144 /* 145 * Optional platform hook to call swiotlb_setup(). 146 */ 147 extern void plat_swiotlb_setup(void); 148 149 #else 150 151 static inline void plat_swiotlb_setup(void) {} 152 153 #endif /* CONFIG_SWIOTLB */ 154 155 #ifdef CONFIG_USE_OF 156 /** 157 * plat_get_fdt() - Return a pointer to the platform's device tree blob 158 * 159 * This function provides a platform independent API to get a pointer to the 160 * flattened device tree blob. The interface between bootloader and kernel 161 * is not consistent across platforms so it is necessary to provide this 162 * API such that common startup code can locate the FDT. 163 * 164 * This is used by the KASLR code to get command line arguments and random 165 * seed from the device tree. Any platform wishing to use KASLR should 166 * provide this API and select SYS_SUPPORTS_RELOCATABLE. 167 * 168 * Return: Pointer to the flattened device tree blob. 169 */ 170 extern void *plat_get_fdt(void); 171 172 #ifdef CONFIG_RELOCATABLE 173 174 /** 175 * plat_fdt_relocated() - Update platform's information about relocated dtb 176 * 177 * This function provides a platform-independent API to set platform's 178 * information about relocated DTB if it needs to be moved due to kernel 179 * relocation occurring at boot. 180 */ 181 void plat_fdt_relocated(void *new_location); 182 183 #endif /* CONFIG_RELOCATABLE */ 184 #endif /* CONFIG_USE_OF */ 185 186 #endif /* _ASM_BOOTINFO_H */ 187