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);
  40#else
  41static inline void visws_early_detect(void) { }
  42#endif
  43
  44extern unsigned long saved_video_mode;
  45
  46extern void reserve_standard_io_resources(void);
  47extern void i386_reserve_resources(void);
  48extern void setup_default_timer_irq(void);
  49
  50#ifdef CONFIG_X86_MRST
  51extern void x86_mrst_early_setup(void);
  52#else
  53static inline void x86_mrst_early_setup(void) { }
  54#endif
  55
  56#ifdef CONFIG_X86_INTEL_CE
  57extern void x86_ce4100_early_setup(void);
  58#else
  59static inline void x86_ce4100_early_setup(void) { }
  60#endif
  61
  62#ifndef _SETUP
  63
  64/*
  65 * This is set up by the setup-routine at boot-time
  66 */
  67extern struct boot_params boot_params;
  68
  69/*
  70 * Do NOT EVER look at the BIOS memory size location.
  71 * It does not work on many machines.
  72 */
  73#define LOWMEMSIZE()    (0x9f000)
  74
  75/* exceedingly early brk-like allocator */
  76extern unsigned long _brk_end;
  77void *extend_brk(size_t size, size_t align);
  78
  79/*
  80 * Reserve space in the brk section.  The name must be unique within
  81 * the file, and somewhat descriptive.  The size is in bytes.  Must be
  82 * used at file scope.
  83 *
  84 * (This uses a temp function to wrap the asm so we can pass it the
  85 * size parameter; otherwise we wouldn't be able to.  We can't use a
  86 * "section" attribute on a normal variable because it always ends up
  87 * being @progbits, which ends up allocating space in the vmlinux
  88 * executable.)
  89 */
  90#define RESERVE_BRK(name,sz)                                            \
  91        static void __section(.discard.text) __used                     \
  92        __brk_reservation_fn_##name##__(void) {                         \
  93                asm volatile (                                          \
  94                        ".pushsection .brk_reservation,\"aw\",@nobits;" \
  95                        ".brk." #name ":"                               \
  96                        " 1:.skip %c0;"                                 \
  97                        " .size .brk." #name ", . - 1b;"                \
  98                        " .popsection"                                  \
  99                        : : "i" (sz));                                  \
 100        }
 101
 102/* Helper for reserving space for arrays of things */
 103#define RESERVE_BRK_ARRAY(type, name, entries)          \
 104        type *name;                                     \
 105        RESERVE_BRK(name, sizeof(type) * entries)
 106
 107#ifdef __i386__
 108
 109void __init i386_start_kernel(void);
 110extern void probe_roms(void);
 111
 112#else
 113void __init x86_64_start_kernel(char *real_mode);
 114void __init x86_64_start_reservations(char *real_mode_data);
 115
 116#endif /* __i386__ */
 117#endif /* _SETUP */
 118#else
 119#define RESERVE_BRK(name,sz)                            \
 120        .pushsection .brk_reservation,"aw",@nobits;     \
 121.brk.name:                                              \
 1221:      .skip sz;                                       \
 123        .size .brk.name,.-1b;                           \
 124        .popsection
 125#endif /* __ASSEMBLY__ */
 126#endif  /*  __KERNEL__  */
 127
 128#endif /* _ASM_X86_SETUP_H */
 129