include/asm/bootinfo.h

0001 /*
0002  * This file is subject to the terms and conditions of the GNU General Public
0003  * License.  See the file COPYING in the main directory of this archive
0004  * for more details.
0005  *
0006  * Copyright (C) 1995, 1996, 2003 by Ralf Baechle
0007  * Copyright (C) 1995, 1996 Andreas Busse
0008  * Copyright (C) 1995, 1996 Stoned Elipot
0009  * Copyright (C) 1995, 1996 Paul M. Antoine.
0010  * Copyright (C) 2009       Zhang Le
0011  */
0012 #ifndef _ASM_BOOTINFO_H
0013 #define _ASM_BOOTINFO_H
0014
0015 #include <linux/types.h>
0016 #include <asm/setup.h>
0017
0018 /*
0019  * The MACH_ IDs are sort of equivalent to PCI product IDs.  As such the
0020  * numbers do not necessarily reflect technical relations or similarities
0021  * between systems.
0022  */
0023
0024 /*
0025  * Valid machtype values for group unknown
0026  */
0027 #define  MACH_UNKNOWN       0   /* whatever...          */
0028
0029 /*
0030  * Valid machtype for group DEC
0031  */
0032 #define  MACH_DSUNKNOWN     0
0033 #define  MACH_DS23100       1   /* DECstation 2100 or 3100  */
0034 #define  MACH_DS5100        2   /* DECsystem 5100       */
0035 #define  MACH_DS5000_200    3   /* DECstation 5000/200      */
0036 #define  MACH_DS5000_1XX    4   /* DECstation 5000/120, 125, 133, 150 */
0037 #define  MACH_DS5000_XX     5   /* DECstation 5000/20, 25, 33, 50 */
0038 #define  MACH_DS5000_2X0    6   /* DECstation 5000/240, 260 */
0039 #define  MACH_DS5400        7   /* DECsystem 5400       */
0040 #define  MACH_DS5500        8   /* DECsystem 5500       */
0041 #define  MACH_DS5800        9   /* DECsystem 5800       */
0042 #define  MACH_DS5900        10  /* DECsystem 5900       */
0043
0044 /*
0045  * Valid machtype for group Mikrotik
0046  */
0047 #define MACH_MIKROTIK_RB532 0   /* Mikrotik RouterBoard 532 */
0048 #define MACH_MIKROTIK_RB532A    1   /* Mikrotik RouterBoard 532A    */
0049
0050 /*
0051  * Valid machtype for Loongson family
0052  */
0053 enum loongson2ef_machine_type {
0054     MACH_LOONGSON_UNKNOWN,
0055     MACH_LEMOTE_FL2E,
0056     MACH_LEMOTE_FL2F,
0057     MACH_LEMOTE_ML2F7,
0058     MACH_LEMOTE_YL2F89,
0059     MACH_DEXXON_GDIUM2F10,
0060     MACH_LEMOTE_NAS,
0061     MACH_LEMOTE_LL2F,
0062     MACH_LOONGSON_END
0063 };
0064
0065 /*
0066  * Valid machtype for group INGENIC
0067  */
0068 enum ingenic_machine_type {
0069     MACH_INGENIC_UNKNOWN,
0070     MACH_INGENIC_JZ4720,
0071     MACH_INGENIC_JZ4725,
0072     MACH_INGENIC_JZ4725B,
0073     MACH_INGENIC_JZ4730,
0074     MACH_INGENIC_JZ4740,
0075     MACH_INGENIC_JZ4750,
0076     MACH_INGENIC_JZ4755,
0077     MACH_INGENIC_JZ4760,
0078     MACH_INGENIC_JZ4760B,
0079     MACH_INGENIC_JZ4770,
0080     MACH_INGENIC_JZ4775,
0081     MACH_INGENIC_JZ4780,
0082     MACH_INGENIC_X1000,
0083     MACH_INGENIC_X1000E,
0084     MACH_INGENIC_X1830,
0085     MACH_INGENIC_X2000,
0086     MACH_INGENIC_X2000E,
0087     MACH_INGENIC_X2000H,
0088     MACH_INGENIC_X2100,
0089 };
0090
0091 extern char *system_type;
0092 const char *get_system_type(void);
0093
0094 extern unsigned long mips_machtype;
0095
0096 extern void detect_memory_region(phys_addr_t start, phys_addr_t sz_min,  phys_addr_t sz_max);
0097
0098 extern void prom_init(void);
0099 extern void prom_free_prom_memory(void);
0100 extern void prom_cleanup(void);
0101
0102 extern void free_init_pages(const char *what,
0103                 unsigned long begin, unsigned long end);
0104
0105 extern void (*free_init_pages_eva)(void *begin, void *end);
0106
0107 /*
0108  * Initial kernel command line, usually setup by prom_init()
0109  */
0110 extern char arcs_cmdline[COMMAND_LINE_SIZE];
0111
0112 /*
0113  * Registers a0, a1, a2 and a3 as passed to the kernel entry by firmware
0114  */
0115 extern unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
0116
0117 #ifdef CONFIG_USE_OF
0118 #include <linux/libfdt.h>
0119 #include <linux/of_fdt.h>
0120
0121 extern char __appended_dtb[];
0122
0123 static inline void *get_fdt(void)
0124 {
0125     if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) ||
0126         IS_ENABLED(CONFIG_MIPS_ELF_APPENDED_DTB))
0127         if (fdt_magic(&__appended_dtb) == FDT_MAGIC)
0128             return &__appended_dtb;
0129
0130     if (fw_arg0 == -2) /* UHI interface */
0131         return (void *)fw_arg1;
0132
0133     if (IS_ENABLED(CONFIG_BUILTIN_DTB))
0134         if (&__dtb_start != &__dtb_end)
0135             return &__dtb_start;
0136
0137     return NULL;
0138 }
0139 #endif
0140
0141 /*
0142  * Platform memory detection hook called by arch_mem_init()
0143  */
0144 extern void plat_mem_setup(void);
0145
0146 #ifdef CONFIG_SWIOTLB
0147 /*
0148  * Optional platform hook to call swiotlb_setup().
0149  */
0150 extern void plat_swiotlb_setup(void);
0151
0152 #else
0153
0154 static inline void plat_swiotlb_setup(void) {}
0155
0156 #endif /* CONFIG_SWIOTLB */
0157
0158 #ifdef CONFIG_USE_OF
0159 /**
0160  * plat_get_fdt() - Return a pointer to the platform's device tree blob
0161  *
0162  * This function provides a platform independent API to get a pointer to the
0163  * flattened device tree blob. The interface between bootloader and kernel
0164  * is not consistent across platforms so it is necessary to provide this
0165  * API such that common startup code can locate the FDT.
0166  *
0167  * This is used by the KASLR code to get command line arguments and random
0168  * seed from the device tree. Any platform wishing to use KASLR should
0169  * provide this API and select SYS_SUPPORTS_RELOCATABLE.
0170  *
0171  * Return: Pointer to the flattened device tree blob.
0172  */
0173 extern void *plat_get_fdt(void);
0174
0175 #ifdef CONFIG_RELOCATABLE
0176
0177 /**
0178  * plat_fdt_relocated() - Update platform's information about relocated dtb
0179  *
0180  * This function provides a platform-independent API to set platform's
0181  * information about relocated DTB if it needs to be moved due to kernel
0182  * relocation occurring at boot.
0183  */
0184 void plat_fdt_relocated(void *new_location);
0185
0186 #endif /* CONFIG_RELOCATABLE */
0187 #endif /* CONFIG_USE_OF */
0188
0189 #endif /* _ASM_BOOTINFO_H */