| #ifndef _X86_64_PAGE_H |
| #define _X86_64_PAGE_H |
| |
| #define PAGETABLE_LEVELS 4 |
| |
| #define THREAD_ORDER 1 |
| #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER) |
| #define CURRENT_MASK (~(THREAD_SIZE - 1)) |
| |
| #define EXCEPTION_STACK_ORDER 0 |
| #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER) |
| |
| #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1) |
| #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER) |
| |
| #define IRQSTACK_ORDER 2 |
| #define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER) |
| |
| #define STACKFAULT_STACK 1 |
| #define DOUBLEFAULT_STACK 2 |
| #define NMI_STACK 3 |
| #define DEBUG_STACK 4 |
| #define MCE_STACK 5 |
| #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */ |
| |
| #define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT) |
| #define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1)) |
| |
| /* |
| * Set __PAGE_OFFSET to the most negative possible address + |
| * PGDIR_SIZE*16 (pgd slot 272). The gap is to allow a space for a |
| * hypervisor to fit. Choosing 16 slots here is arbitrary, but it's |
| * what Xen requires. |
| */ |
| #define __PAGE_OFFSET _AC(0xffff880000000000, UL) |
| |
| #define __PHYSICAL_START CONFIG_PHYSICAL_START |
| #define __KERNEL_ALIGN 0x200000 |
| |
| /* |
| * Make sure kernel is aligned to 2MB address. Catching it at compile |
| * time is better. Change your config file and compile the kernel |
| * for a 2MB aligned address (CONFIG_PHYSICAL_START) |
| */ |
| #if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0 |
| #error "CONFIG_PHYSICAL_START must be a multiple of 2MB" |
| #endif |
| |
| #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) |
| #define __START_KERNEL_map _AC(0xffffffff80000000, UL) |
| |
| /* See Documentation/x86_64/mm.txt for a description of the memory map. */ |
| #define __PHYSICAL_MASK_SHIFT 46 |
| #define __VIRTUAL_MASK_SHIFT 48 |
| |
| /* |
| * Kernel image size is limited to 512 MB (see level2_kernel_pgt in |
| * arch/x86/kernel/head_64.S), and it is mapped here: |
| */ |
| #define KERNEL_IMAGE_SIZE (512 * 1024 * 1024) |
| #define KERNEL_IMAGE_START _AC(0xffffffff80000000, UL) |
| |
| #ifndef __ASSEMBLY__ |
| void clear_page(void *page); |
| void copy_page(void *to, void *from); |
| |
| /* duplicated to the one in bootmem.h */ |
| extern unsigned long max_pfn; |
| extern unsigned long phys_base; |
| |
| extern unsigned long __phys_addr(unsigned long); |
| #define __phys_reloc_hide(x) (x) |
| |
| /* |
| * These are used to make use of C type-checking.. |
| */ |
| typedef unsigned long pteval_t; |
| typedef unsigned long pmdval_t; |
| typedef unsigned long pudval_t; |
| typedef unsigned long pgdval_t; |
| typedef unsigned long pgprotval_t; |
| |
| typedef struct page *pgtable_t; |
| |
| typedef struct { pteval_t pte; } pte_t; |
| |
| #define vmemmap ((struct page *)VMEMMAP_START) |
| |
| extern unsigned long init_memory_mapping(unsigned long start, |
| unsigned long end); |
| |
| extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn); |
| |
| extern void init_extra_mapping_uc(unsigned long phys, unsigned long size); |
| extern void init_extra_mapping_wb(unsigned long phys, unsigned long size); |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #ifdef CONFIG_FLATMEM |
| #define pfn_valid(pfn) ((pfn) < max_pfn) |
| #endif |
| |
| |
| #endif /* _X86_64_PAGE_H */ |