1 #ifndef _ASM_X86_SETUP_H 2 #define _ASM_X86_SETUP_H 3 4 #include <uapi/asm/setup.h> 5 6 7 #define COMMAND_LINE_SIZE 2048 8 9 #include <linux/linkage.h> 10 11 #ifdef __i386__ 12 13 #include <linux/pfn.h> 14 /* 15 * Reserved space for vmalloc and iomap - defined in asm/page.h 16 */ 17 #define MAXMEM_PFN PFN_DOWN(MAXMEM) 18 #define MAX_NONPAE_PFN (1 << 20) 19 20 #endif /* __i386__ */ 21 22 #define PARAM_SIZE 4096 /* sizeof(struct boot_params) */ 23 24 #define OLD_CL_MAGIC 0xA33F 25 #define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */ 26 #define NEW_CL_POINTER 0x228 /* Relative to real mode data */ 27 28 #ifndef __ASSEMBLY__ 29 #include <asm/bootparam.h> 30 #include <asm/x86_init.h> 31 32 /* Interrupt control for vSMPowered x86_64 systems */ 33 #ifdef CONFIG_X86_64 34 void vsmp_init(void); 35 #else 36 static inline void vsmp_init(void) { } 37 #endif 38 39 void setup_bios_corruption_check(void); 40 41 #ifdef CONFIG_X86_VISWS 42 extern void visws_early_detect(void); 43 #else 44 static inline void visws_early_detect(void) { } 45 #endif 46 47 extern unsigned long saved_video_mode; 48 49 extern void reserve_standard_io_resources(void); 50 extern void i386_reserve_resources(void); 51 extern void setup_default_timer_irq(void); 52 53 #ifdef CONFIG_X86_INTEL_MID 54 extern void x86_mrst_early_setup(void); 55 #else 56 static inline void x86_mrst_early_setup(void) { } 57 #endif 58 59 #ifdef CONFIG_X86_INTEL_CE 60 extern void x86_ce4100_early_setup(void); 61 #else 62 static inline void x86_ce4100_early_setup(void) { } 63 #endif 64 65 #ifndef _SETUP 66 67 /* 68 * This is set up by the setup-routine at boot-time 69 */ 70 extern struct boot_params boot_params; 71 72 /* 73 * Do NOT EVER look at the BIOS memory size location. 74 * It does not work on many machines. 75 */ 76 #define LOWMEMSIZE() (0x9f000) 77 78 /* exceedingly early brk-like allocator */ 79 extern unsigned long _brk_end; 80 void *extend_brk(size_t size, size_t align); 81 82 /* 83 * Reserve space in the brk section. The name must be unique within 84 * the file, and somewhat descriptive. The size is in bytes. Must be 85 * used at file scope. 86 * 87 * (This uses a temp function to wrap the asm so we can pass it the 88 * size parameter; otherwise we wouldn't be able to. We can't use a 89 * "section" attribute on a normal variable because it always ends up 90 * being @progbits, which ends up allocating space in the vmlinux 91 * executable.) 92 */ 93 #define RESERVE_BRK(name,sz) \ 94 static void __section(.discard.text) __used notrace \ 95 __brk_reservation_fn_##name##__(void) { \ 96 asm volatile ( \ 97 ".pushsection .brk_reservation,\"aw\",@nobits;" \ 98 ".brk." #name ":" \ 99 " 1:.skip %c0;" \ 100 " .size .brk." #name ", . - 1b;" \ 101 " .popsection" \ 102 : : "i" (sz)); \ 103 } 104 105 /* Helper for reserving space for arrays of things */ 106 #define RESERVE_BRK_ARRAY(type, name, entries) \ 107 type *name; \ 108 RESERVE_BRK(name, sizeof(type) * entries) 109 110 extern void probe_roms(void); 111 #ifdef __i386__ 112 113 asmlinkage void __init i386_start_kernel(void); 114 115 #else 116 asmlinkage void __init x86_64_start_kernel(char *real_mode); 117 asmlinkage void __init x86_64_start_reservations(char *real_mode_data); 118 119 #endif /* __i386__ */ 120 #endif /* _SETUP */ 121 #else 122 #define RESERVE_BRK(name,sz) \ 123 .pushsection .brk_reservation,"aw",@nobits; \ 124 .brk.name: \ 125 1: .skip sz; \ 126 .size .brk.name,.-1b; \ 127 .popsection 128 #endif /* __ASSEMBLY__ */ 129 #endif /* _ASM_X86_SETUP_H */ 130