1 #ifndef _ASM_X86_PAGE_64_DEFS_H 2 #define _ASM_X86_PAGE_64_DEFS_H 3 4 #define THREAD_ORDER 1 5 #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER) 6 #define CURRENT_MASK (~(THREAD_SIZE - 1)) 7 8 #define EXCEPTION_STACK_ORDER 0 9 #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER) 10 11 #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1) 12 #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER) 13 14 #define IRQ_STACK_ORDER 2 15 #define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER) 16 17 #define STACKFAULT_STACK 1 18 #define DOUBLEFAULT_STACK 2 19 #define NMI_STACK 3 20 #define DEBUG_STACK 4 21 #define MCE_STACK 5 22 #define N_EXCEPTION_STACKS 5 /* hw limit: 7 */ 23 24 #define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT) 25 #define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1)) 26 27 /* 28 * Set __PAGE_OFFSET to the most negative possible address + 29 * PGDIR_SIZE*16 (pgd slot 272). The gap is to allow a space for a 30 * hypervisor to fit. Choosing 16 slots here is arbitrary, but it's 31 * what Xen requires. 32 */ 33 #define __PAGE_OFFSET _AC(0xffff880000000000, UL) 34 35 #define __PHYSICAL_START ((CONFIG_PHYSICAL_START + \ 36 (CONFIG_PHYSICAL_ALIGN - 1)) & \ 37 ~(CONFIG_PHYSICAL_ALIGN - 1)) 38 39 #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) 40 #define __START_KERNEL_map _AC(0xffffffff80000000, UL) 41 42 /* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */ 43 #define __PHYSICAL_MASK_SHIFT 46 44 #define __VIRTUAL_MASK_SHIFT 47 45 46 /* 47 * Kernel image size is limited to 512 MB (see level2_kernel_pgt in 48 * arch/x86/kernel/head_64.S), and it is mapped here: 49 */ 50 #define KERNEL_IMAGE_SIZE (512 * 1024 * 1024) 51 #define KERNEL_IMAGE_START _AC(0xffffffff80000000, UL) 52 53 #ifndef __ASSEMBLY__ 54 void clear_page(void *page); 55 void copy_page(void *to, void *from); 56 57 /* duplicated to the one in bootmem.h */ 58 extern unsigned long max_pfn; 59 extern unsigned long phys_base; 60 61 extern unsigned long __phys_addr(unsigned long); 62 #define __phys_reloc_hide(x) (x) 63 64 #define vmemmap ((struct page *)VMEMMAP_START) 65 66 extern void init_extra_mapping_uc(unsigned long phys, unsigned long size); 67 extern void init_extra_mapping_wb(unsigned long phys, unsigned long size); 68 69 #endif /* !__ASSEMBLY__ */ 70 71 #ifdef CONFIG_FLATMEM 72 #define pfn_valid(pfn) ((pfn) < max_pfn) 73 #endif 74 75 #endif /* _ASM_X86_PAGE_64_DEFS_H */ 76