LXR linux/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#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
  31void vsmp_init(void);
  32#else
  33static inline void vsmp_init(void) { }
  34#endif
  35
  36void setup_bios_corruption_check(void);
  37
  38#ifdef CONFIG_X86_VISWS
  39extern void visws_early_detect(void);
  40extern int is_visws_box(void);
  41#else
  42static inline void visws_early_detect(void) { }
  43static inline int is_visws_box(void) { return 0; }
  44#endif
  45
  46extern unsigned long saved_video_mode;
  47
  48extern void reserve_standard_io_resources(void);
  49extern void i386_reserve_resources(void);
  50extern void setup_default_timer_irq(void);
  51
  52#ifdef CONFIG_X86_MRST
  53extern void x86_mrst_early_setup(void);
  54#else
  55static inline void x86_mrst_early_setup(void) { }
  56#endif
  57
  58#ifndef _SETUP
  59
  60/*
  61 * This is set up by the setup-routine at boot-time
  62 */
  63extern struct boot_params boot_params;
  64
  65/*
  66 * Do NOT EVER look at the BIOS memory size location.
  67 * It does not work on many machines.
  68 */
  69#define LOWMEMSIZE()    (0x9f000)
  70
  71/* exceedingly early brk-like allocator */
  72extern unsigned long _brk_end;
  73void *extend_brk(size_t size, size_t align);
  74
  75/*
  76 * Reserve space in the brk section.  The name must be unique within
  77 * the file, and somewhat descriptive.  The size is in bytes.  Must be
  78 * used at file scope.
  79 *
  80 * (This uses a temp function to wrap the asm so we can pass it the
  81 * size parameter; otherwise we wouldn't be able to.  We can't use a
  82 * "section" attribute on a normal variable because it always ends up
  83 * being @progbits, which ends up allocating space in the vmlinux
  84 * executable.)
  85 */
  86#define RESERVE_BRK(name,sz)                                            \
  87        static void __section(.discard) __used                          \
  88        __brk_reservation_fn_##name##__(void) {                         \
  89                asm volatile (                                          \
  90                        ".pushsection .brk_reservation,\"aw\",@nobits;" \
  91                        ".brk." #name ":"                               \
  92                        " 1:.skip %c0;"                                 \
  93                        " .size .brk." #name ", . - 1b;"                \
  94                        " .popsection"                                  \
  95                        : : "i" (sz));                                  \
  96        }
  97
  98#ifdef __i386__
  99
 100void __init i386_start_kernel(void);
 101extern void probe_roms(void);
 102
 103#else
 104void __init x86_64_start_kernel(char *real_mode);
 105void __init x86_64_start_reservations(char *real_mode_data);
 106
 107#endif /* __i386__ */
 108#endif /* _SETUP */
 109#else
 110#define RESERVE_BRK(name,sz)                            \
 111        .pushsection .brk_reservation,"aw",@nobits;     \
 112.brk.name:                                              \
 1131:      .skip sz;                                       \
 114        .size .brk.name,.-1b;                           \
 115        .popsection
 116#endif /* __ASSEMBLY__ */
 117#endif  /*  __KERNEL__  */
 118
 119#endif /* _ASM_X86_SETUP_H */
 120