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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_SETUP_H #define _ASM_X86_SETUP_H #include <uapi/asm/setup.h> #define COMMAND_LINE_SIZE 2048 #include <linux/linkage.h> #include <asm/page_types.h> #include <asm/ibt.h> #ifdef __i386__ #include <linux/pfn.h> /* * Reserved space for vmalloc and iomap - defined in asm/page.h */ #define MAXMEM_PFN PFN_DOWN(MAXMEM) #define MAX_NONPAE_PFN (1 << 20) #endif /* __i386__ */ #define PARAM_SIZE 4096 /* sizeof(struct boot_params) */ #define OLD_CL_MAGIC 0xA33F #define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */ #define NEW_CL_POINTER 0x228 /* Relative to real mode data */ #ifndef __ASSEMBLY__ #include <asm/bootparam.h> #include <asm/x86_init.h> extern u64 relocated_ramdisk; /* Interrupt control for vSMPowered x86_64 systems */ #ifdef CONFIG_X86_64 void vsmp_init(void); #else static inline void vsmp_init(void) { } #endif struct pt_regs; void setup_bios_corruption_check(void); void early_platform_quirks(void); extern unsigned long saved_video_mode; extern void reserve_standard_io_resources(void); extern void i386_reserve_resources(void); extern unsigned long __startup_64(unsigned long physaddr, struct boot_params *bp); extern void startup_64_setup_env(unsigned long physbase); extern void early_setup_idt(void); extern void __init do_early_exception(struct pt_regs *regs, int trapnr); #ifdef CONFIG_X86_INTEL_MID extern void x86_intel_mid_early_setup(void); #else static inline void x86_intel_mid_early_setup(void) { } #endif #ifdef CONFIG_X86_INTEL_CE extern void x86_ce4100_early_setup(void); #else static inline void x86_ce4100_early_setup(void) { } #endif #ifndef _SETUP #include <asm/espfix.h> #include <linux/kernel.h> /* * This is set up by the setup-routine at boot-time */ extern struct boot_params boot_params; extern char _text[]; static inline bool kaslr_enabled(void) { return IS_ENABLED(CONFIG_RANDOMIZE_MEMORY) && !!(boot_params.hdr.loadflags & KASLR_FLAG); } /* * Apply no randomization if KASLR was disabled at boot or if KASAN * is enabled. KASAN shadow mappings rely on regions being PGD aligned. */ static inline bool kaslr_memory_enabled(void) { return kaslr_enabled() && !IS_ENABLED(CONFIG_KASAN); } static inline unsigned long kaslr_offset(void) { return (unsigned long)&_text - __START_KERNEL; } /* * Do NOT EVER look at the BIOS memory size location. * It does not work on many machines. */ #define LOWMEMSIZE() (0x9f000) /* exceedingly early brk-like allocator */ extern unsigned long _brk_end; void *extend_brk(size_t size, size_t align); /* * Reserve space in the .brk section, which is a block of memory from which the * caller is allowed to allocate very early (before even memblock is available) * by calling extend_brk(). All allocated memory will be eventually converted * to memblock. Any leftover unallocated memory will be freed. * * The size is in bytes. */ #define RESERVE_BRK(name, size) \ __section(".bss..brk") __aligned(1) __used \ static char __brk_##name[size] extern void probe_roms(void); void clear_bss(void); #ifdef __i386__ asmlinkage void __init i386_start_kernel(void); #else asmlinkage void __init x86_64_start_kernel(char *real_mode); asmlinkage void __init x86_64_start_reservations(char *real_mode_data); #endif /* __i386__ */ #endif /* _SETUP */ #else /* __ASSEMBLY */ .macro __RESERVE_BRK name, size .pushsection .bss..brk, "aw" SYM_DATA_START(__brk_\name) .skip \size SYM_DATA_END(__brk_\name) .popsection .endm #define RESERVE_BRK(name, size) __RESERVE_BRK name, size #endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_SETUP_H */ |