1 #ifndef _ASM_X86_SETUP_H 2 #define _ASM_X86_SETUP_H 3 4 #include <uapi/asm/setup.h> 5 6 #define COMMAND_LINE_SIZE 2048 7 8 #include <linux/linkage.h> 9 10 #ifdef __i386__ 11 12 #include <linux/pfn.h> 13 /* 14 * Reserved space for vmalloc and iomap - defined in asm/page.h 15 */ 16 #define MAXMEM_PFN PFN_DOWN(MAXMEM) 17 #define MAX_NONPAE_PFN (1 << 20) 18 19 #endif /* __i386__ */ 20 21 #define PARAM_SIZE 4096 /* sizeof(struct boot_params) */ 22 23 #define OLD_CL_MAGIC 0xA33F 24 #define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */ 25 #define NEW_CL_POINTER 0x228 /* Relative to real mode data */ 26 27 #ifndef __ASSEMBLY__ 28 #include <asm/bootparam.h> 29 #include <asm/x86_init.h> 30 31 extern u64 relocated_ramdisk; 32 33 /* Interrupt control for vSMPowered x86_64 systems */ 34 #ifdef CONFIG_X86_64 35 void vsmp_init(void); 36 #else 37 static inline void vsmp_init(void) { } 38 #endif 39 40 void setup_bios_corruption_check(void); 41 42 extern unsigned long saved_video_mode; 43 44 extern void reserve_standard_io_resources(void); 45 extern void i386_reserve_resources(void); 46 extern void setup_default_timer_irq(void); 47 48 #ifdef CONFIG_X86_INTEL_MID 49 extern void x86_intel_mid_early_setup(void); 50 #else 51 static inline void x86_intel_mid_early_setup(void) { } 52 #endif 53 54 #ifdef CONFIG_X86_INTEL_CE 55 extern void x86_ce4100_early_setup(void); 56 #else 57 static inline void x86_ce4100_early_setup(void) { } 58 #endif 59 60 #ifndef _SETUP 61 62 #include <asm/espfix.h> 63 64 /* 65 * This is set up by the setup-routine at boot-time 66 */ 67 extern struct boot_params boot_params; 68 69 /* 70 * Do NOT EVER look at the BIOS memory size location. 71 * It does not work on many machines. 72 */ 73 #define LOWMEMSIZE() (0x9f000) 74 75 /* exceedingly early brk-like allocator */ 76 extern unsigned long _brk_end; 77 void *extend_brk(size_t size, size_t align); 78 79 /* 80 * Reserve space in the brk section. The name must be unique within 81 * the file, and somewhat descriptive. The size is in bytes. Must be 82 * used at file scope. 83 * 84 * (This uses a temp function to wrap the asm so we can pass it the 85 * size parameter; otherwise we wouldn't be able to. We can't use a 86 * "section" attribute on a normal variable because it always ends up 87 * being @progbits, which ends up allocating space in the vmlinux 88 * executable.) 89 */ 90 #define RESERVE_BRK(name,sz) \ 91 static void __section(.discard.text) __used notrace \ 92 __brk_reservation_fn_##name##__(void) { \ 93 asm volatile ( \ 94 ".pushsection .brk_reservation,\"aw\",@nobits;" \ 95 ".brk." #name ":" \ 96 " 1:.skip %c0;" \ 97 " .size .brk." #name ", . - 1b;" \ 98 " .popsection" \ 99 : : "i" (sz)); \ 100 } 101 102 /* Helper for reserving space for arrays of things */ 103 #define RESERVE_BRK_ARRAY(type, name, entries) \ 104 type *name; \ 105 RESERVE_BRK(name, sizeof(type) * entries) 106 107 extern void probe_roms(void); 108 #ifdef __i386__ 109 110 asmlinkage void __init i386_start_kernel(void); 111 112 #else 113 asmlinkage void __init x86_64_start_kernel(char *real_mode); 114 asmlinkage void __init x86_64_start_reservations(char *real_mode_data); 115 116 #endif /* __i386__ */ 117 #endif /* _SETUP */ 118 #else 119 #define RESERVE_BRK(name,sz) \ 120 .pushsection .brk_reservation,"aw",@nobits; \ 121 .brk.name: \ 122 1: .skip sz; \ 123 .size .brk.name,.-1b; \ 124 .popsection 125 #endif /* __ASSEMBLY__ */ 126 #endif /* _ASM_X86_SETUP_H */ 127