LXR linux/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 */
  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_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
  88extern char *system_type;
  89const char *get_system_type(void);
  90
  91extern unsigned long mips_machtype;
  92
  93extern void detect_memory_region(phys_addr_t start, phys_addr_t sz_min,  phys_addr_t sz_max);
  94
  95extern void prom_init(void);
  96extern void prom_free_prom_memory(void);
  97extern void prom_cleanup(void);
  98
  99extern void free_init_pages(const char *what,
 100                            unsigned long begin, unsigned long end);
 101
 102extern void (*free_init_pages_eva)(void *begin, void *end);
 103
 104/*
 105 * Initial kernel command line, usually setup by prom_init()
 106 */
 107extern char arcs_cmdline[COMMAND_LINE_SIZE];
 108
 109/*
 110 * Registers a0, a1, a2 and a3 as passed to the kernel entry by firmware
 111 */
 112extern 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
 118extern char __appended_dtb[];
 119
 120static 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 */
 141extern void plat_mem_setup(void);
 142
 143#ifdef CONFIG_SWIOTLB
 144/*
 145 * Optional platform hook to call swiotlb_setup().
 146 */
 147extern void plat_swiotlb_setup(void);
 148
 149#else
 150
 151static 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 */
 170extern 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 */
 181void plat_fdt_relocated(void *new_location);
 182
 183#endif /* CONFIG_RELOCATABLE */
 184#endif /* CONFIG_USE_OF */
 185
 186#endif /* _ASM_BOOTINFO_H */
 187