arch/x86/include/asm/setup.h

   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 #ifndef __ASSEMBLY__
   9
  10 #include <asm/x86_init.h>
  11
  12 /*
  13  * Any setup quirks to be performed?
  14  */
  15
  16 struct x86_quirks {
  17         int (*arch_pre_time_init)(void);
  18         int (*arch_time_init)(void);
  19         int (*arch_trap_init)(void);
  20 };
  21
  22 extern void x86_quirk_trap_init(void);
  23
  24 extern void x86_quirk_pre_time_init(void);
  25 extern void x86_quirk_time_init(void);
  26
  27 #endif /* __ASSEMBLY__ */
  28
  29 #ifdef __i386__
  30
  31 #include <linux/pfn.h>
  32 /*
  33  * Reserved space for vmalloc and iomap - defined in asm/page.h
  34  */
  35 #define MAXMEM_PFN      PFN_DOWN(MAXMEM)
  36 #define MAX_NONPAE_PFN  (1 << 20)
  37
  38 #endif /* __i386__ */
  39
  40 #define PARAM_SIZE 4096         /* sizeof(struct boot_params) */
  41
  42 #define OLD_CL_MAGIC            0xA33F
  43 #define OLD_CL_ADDRESS          0x020   /* Relative to real mode data */
  44 #define NEW_CL_POINTER          0x228   /* Relative to real mode data */
  45
  46 #ifndef __ASSEMBLY__
  47 #include <asm/bootparam.h>
  48
  49 /* Interrupt control for vSMPowered x86_64 systems */
  50 #ifdef CONFIG_X86_64
  51 void vsmp_init(void);
  52 #else
  53 static inline void vsmp_init(void) { }
  54 #endif
  55
  56 void setup_bios_corruption_check(void);
  57
  58 #ifdef CONFIG_X86_VISWS
  59 extern void visws_early_detect(void);
  60 extern int is_visws_box(void);
  61 #else
  62 static inline void visws_early_detect(void) { }
  63 static inline int is_visws_box(void) { return 0; }
  64 #endif
  65
  66 extern struct x86_quirks *x86_quirks;
  67 extern unsigned long saved_video_mode;
  68
  69 #ifndef CONFIG_PARAVIRT
  70 #define paravirt_post_allocator_init()  do {} while (0)
  71 #endif
  72
  73 extern void reserve_standard_io_resources(void);
  74 extern void i386_reserve_resources(void);
  75
  76 #ifndef _SETUP
  77
  78 /*
  79  * This is set up by the setup-routine at boot-time
  80  */
  81 extern struct boot_params boot_params;
  82
  83 /*
  84  * Do NOT EVER look at the BIOS memory size location.
  85  * It does not work on many machines.
  86  */
  87 #define LOWMEMSIZE()    (0x9f000)
  88
  89 /* exceedingly early brk-like allocator */
  90 extern unsigned long _brk_end;
  91 void *extend_brk(size_t size, size_t align);
  92
  93 /*
  94  * Reserve space in the brk section.  The name must be unique within
  95  * the file, and somewhat descriptive.  The size is in bytes.  Must be
  96  * used at file scope.
  97  *
  98  * (This uses a temp function to wrap the asm so we can pass it the
  99  * size parameter; otherwise we wouldn't be able to.  We can't use a
 100  * "section" attribute on a normal variable because it always ends up
 101  * being @progbits, which ends up allocating space in the vmlinux
 102  * executable.)
 103  */
 104 #define RESERVE_BRK(name,sz)                                            \
 105         static void __section(.discard) __used                          \
 106         __brk_reservation_fn_##name##__(void) {                         \
 107                 asm volatile (                                          \
 108                         ".pushsection .brk_reservation,\"aw\",@nobits;" \
 109                         ".brk." #name ":"                               \
 110                         " 1:.skip %c0;"                                 \
 111                         " .size .brk." #name ", . - 1b;"                \
 112                         " .popsection"                                  \
 113                         : : "i" (sz));                                  \
 114         }
 115
 116 #ifdef __i386__
 117
 118 void __init i386_start_kernel(void);
 119 extern void probe_roms(void);
 120
 121 #else
 122 void __init x86_64_start_kernel(char *real_mode);
 123 void __init x86_64_start_reservations(char *real_mode_data);
 124
 125 #endif /* __i386__ */
 126 #endif /* _SETUP */
 127 #else
 128 #define RESERVE_BRK(name,sz)                            \
 129         .pushsection .brk_reservation,"aw",@nobits;     \
 130 .brk.name:                                              \
 131 1:      .skip sz;                                       \
 132         .size .brk.name,.-1b;                           \
 133         .popsection
 134 #endif /* __ASSEMBLY__ */
 135 #endif  /*  __KERNEL__  */
 136
 137 #endif /* _ASM_X86_SETUP_H */