1 #ifndef _ASM_X86_SETUP_H 2 #define _ASM_X86_SETUP_H 3 4 #ifdef __KERNEL__ 5 6 #define COMMAND_LINE_SIZE 2048 7 8 #ifdef __i386__ 9 10 #include <linux/pfn.h> 11 /* 12 * Reserved space for vmalloc and iomap - defined in asm/page.h 13 */ 14 #define MAXMEM_PFN PFN_DOWN(MAXMEM) 15 #define MAX_NONPAE_PFN (1 << 20) 16 17 #endif /* __i386__ */ 18 19 #define PARAM_SIZE 4096 /* sizeof(struct boot_params) */ 20 21 #define OLD_CL_MAGIC 0xA33F 22 #define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */ 23 #define NEW_CL_POINTER 0x228 /* Relative to real mode data */ 24 25 #ifndef __ASSEMBLY__ 26 #include <asm/bootparam.h> 27 #include <asm/x86_init.h> 28 29 /* Interrupt control for vSMPowered x86_64 systems */ 30 #ifdef CONFIG_X86_64 31 void vsmp_init(void); 32 #else 33 static inline void vsmp_init(void) { } 34 #endif 35 36 void setup_bios_corruption_check(void); 37 38 #ifdef CONFIG_X86_VISWS 39 extern void visws_early_detect(void); 40 #else 41 static inline void visws_early_detect(void) { } 42 #endif 43 44 extern unsigned long saved_video_mode; 45 46 extern void reserve_standard_io_resources(void); 47 extern void i386_reserve_resources(void); 48 extern void setup_default_timer_irq(void); 49 50 #ifdef CONFIG_X86_MRST 51 extern void x86_mrst_early_setup(void); 52 #else 53 static inline void x86_mrst_early_setup(void) { } 54 #endif 55 56 #ifndef _SETUP 57 58 /* 59 * This is set up by the setup-routine at boot-time 60 */ 61 extern struct boot_params boot_params; 62 63 /* 64 * Do NOT EVER look at the BIOS memory size location. 65 * It does not work on many machines. 66 */ 67 #define LOWMEMSIZE() (0x9f000) 68 69 /* exceedingly early brk-like allocator */ 70 extern unsigned long _brk_end; 71 void *extend_brk(size_t size, size_t align); 72 73 /* 74 * Reserve space in the brk section. The name must be unique within 75 * the file, and somewhat descriptive. The size is in bytes. Must be 76 * used at file scope. 77 * 78 * (This uses a temp function to wrap the asm so we can pass it the 79 * size parameter; otherwise we wouldn't be able to. We can't use a 80 * "section" attribute on a normal variable because it always ends up 81 * being @progbits, which ends up allocating space in the vmlinux 82 * executable.) 83 */ 84 #define RESERVE_BRK(name,sz) \ 85 static void __section(.discard) __used \ 86 __brk_reservation_fn_##name##__(void) { \ 87 asm volatile ( \ 88 ".pushsection .brk_reservation,\"aw\",@nobits;" \ 89 ".brk." #name ":" \ 90 " 1:.skip %c0;" \ 91 " .size .brk." #name ", . - 1b;" \ 92 " .popsection" \ 93 : : "i" (sz)); \ 94 } 95 96 #ifdef __i386__ 97 98 void __init i386_start_kernel(void); 99 extern void probe_roms(void); 100 101 #else 102 void __init x86_64_start_kernel(char *real_mode); 103 void __init x86_64_start_reservations(char *real_mode_data); 104 105 #endif /* __i386__ */ 106 #endif /* _SETUP */ 107 #else 108 #define RESERVE_BRK(name,sz) \ 109 .pushsection .brk_reservation,"aw",@nobits; \ 110 .brk.name: \ 111 1: .skip sz; \ 112 .size .brk.name,.-1b; \ 113 .popsection 114 #endif /* __ASSEMBLY__ */ 115 #endif /* __KERNEL__ */ 116 117 #endif /* _ASM_X86_SETUP_H */ 118