arch/x86/include/asm/setup.h

   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 */