arch/mips/include/asm/bootinfo.h

   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
 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
 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 */