1 #ifndef _ASM_X86_PAGE_64_DEFS_H 2 #define _ASM_X86_PAGE_64_DEFS_H 3 4 #define THREAD_SIZE_ORDER 2 5 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_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 DOUBLEFAULT_STACK 1 18 #define NMI_STACK 2 19 #define DEBUG_STACK 3 20 #define MCE_STACK 4 21 #define N_EXCEPTION_STACKS 4 /* hw limit: 7 */ 22 23 #define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT) 24 #define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1)) 25 26 /* 27 * Set __PAGE_OFFSET to the most negative possible address + 28 * PGDIR_SIZE*16 (pgd slot 272). The gap is to allow a space for a 29 * hypervisor to fit. Choosing 16 slots here is arbitrary, but it's 30 * what Xen requires. 31 */ 32 #define __PAGE_OFFSET _AC(0xffff880000000000, UL) 33 34 #define __START_KERNEL_map _AC(0xffffffff80000000, UL) 35 36 /* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */ 37 #define __PHYSICAL_MASK_SHIFT 46 38 #define __VIRTUAL_MASK_SHIFT 47 39 40 /* 41 * Kernel image size is limited to 1GiB due to the fixmap living in the 42 * next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S). Use 43 * 512MiB by default, leaving 1.5GiB for modules once the page tables 44 * are fully set up. If kernel ASLR is configured, it can extend the 45 * kernel page table mapping, reducing the size of the modules area. 46 */ 47 #define KERNEL_IMAGE_SIZE_DEFAULT (512 * 1024 * 1024) 48 #if defined(CONFIG_RANDOMIZE_BASE) && \ 49 CONFIG_RANDOMIZE_BASE_MAX_OFFSET > KERNEL_IMAGE_SIZE_DEFAULT 50 #define KERNEL_IMAGE_SIZE CONFIG_RANDOMIZE_BASE_MAX_OFFSET 51 #else 52 #define KERNEL_IMAGE_SIZE KERNEL_IMAGE_SIZE_DEFAULT 53 #endif 54 55 #endif /* _ASM_X86_PAGE_64_DEFS_H */ 56