Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
setup.h
Go to the documentation of this file.
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 
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_INTEL_MID
51 extern void x86_mrst_early_setup(void);
52 #else
53 static inline void x86_mrst_early_setup(void) { }
54 #endif
55 
56 #ifdef CONFIG_X86_INTEL_CE
57 extern void x86_ce4100_early_setup(void);
58 #else
59 static 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  */
67 extern 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 */
76 extern unsigned long _brk_end;
77 void *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 notrace \
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 extern void probe_roms(void);
108 #ifdef __i386__
109 
110 void __init i386_start_kernel(void);
111 
112 #else
114 void __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: \
122 1: .skip sz; \
123  .size .brk.name,.-1b; \
124  .popsection
125 #endif /* __ASSEMBLY__ */
126 #endif /* __KERNEL__ */
127 
128 #endif /* _ASM_X86_SETUP_H */