tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _X86_64_PAGE_H
2#define _X86_64_PAGE_H
3
4#define PAGETABLE_LEVELS 4
5
6#define THREAD_ORDER 1
7#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
8#define CURRENT_MASK (~(THREAD_SIZE-1))
9
10#define EXCEPTION_STACK_ORDER 0
11#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
12
13#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
14#define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
15
16#define IRQSTACK_ORDER 2
17#define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
18
19#define STACKFAULT_STACK 1
20#define DOUBLEFAULT_STACK 2
21#define NMI_STACK 3
22#define DEBUG_STACK 4
23#define MCE_STACK 5
24#define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
25
26#define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT)
27#define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1))
28
29#define __PAGE_OFFSET _AC(0xffff810000000000, UL)
30
31#define __PHYSICAL_START CONFIG_PHYSICAL_START
32#define __KERNEL_ALIGN 0x200000
33
34/*
35 * Make sure kernel is aligned to 2MB address. Catching it at compile
36 * time is better. Change your config file and compile the kernel
37 * for a 2MB aligned address (CONFIG_PHYSICAL_START)
38 */
39#if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
40#error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
41#endif
42
43#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
44#define __START_KERNEL_map _AC(0xffffffff80000000, UL)
45
46/* See Documentation/x86_64/mm.txt for a description of the memory map. */
47#define __PHYSICAL_MASK_SHIFT 46
48#define __VIRTUAL_MASK_SHIFT 48
49
50/*
51 * Kernel image size is limited to 128 MB (see level2_kernel_pgt in
52 * arch/x86/kernel/head_64.S), and it is mapped here:
53 */
54#define KERNEL_IMAGE_SIZE (128*1024*1024)
55#define KERNEL_IMAGE_START _AC(0xffffffff80000000, UL)
56
57#ifndef __ASSEMBLY__
58void clear_page(void *page);
59void copy_page(void *to, void *from);
60
61extern unsigned long end_pfn;
62extern unsigned long end_pfn_map;
63extern unsigned long phys_base;
64
65extern unsigned long __phys_addr(unsigned long);
66#define __phys_reloc_hide(x) (x)
67
68/*
69 * These are used to make use of C type-checking..
70 */
71typedef unsigned long pteval_t;
72typedef unsigned long pmdval_t;
73typedef unsigned long pudval_t;
74typedef unsigned long pgdval_t;
75typedef unsigned long pgprotval_t;
76typedef unsigned long phys_addr_t;
77
78typedef struct page *pgtable_t;
79
80typedef struct { pteval_t pte; } pte_t;
81
82#define vmemmap ((struct page *)VMEMMAP_START)
83
84#endif /* !__ASSEMBLY__ */
85
86#ifdef CONFIG_FLATMEM
87#define pfn_valid(pfn) ((pfn) < end_pfn)
88#endif
89
90
91#endif /* _X86_64_PAGE_H */