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