| #ifndef _ASM_X86_PAGE_32_DEFS_H |
| #define _ASM_X86_PAGE_32_DEFS_H |
| |
| #include <linux/const.h> |
| |
| /* |
| * This handles the memory map. |
| * |
| * A __PAGE_OFFSET of 0xC0000000 means that the kernel has |
| * a virtual address space of one gigabyte, which limits the |
| * amount of physical memory you can use to about 950MB. |
| * |
| * If you want more physical memory than this then see the CONFIG_HIGHMEM4G |
| * and CONFIG_HIGHMEM64G options in the kernel configuration. |
| */ |
| #define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) |
| |
| #define THREAD_ORDER 1 |
| #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER) |
| |
| #define STACKFAULT_STACK 0 |
| #define DOUBLEFAULT_STACK 1 |
| #define NMI_STACK 0 |
| #define DEBUG_STACK 0 |
| #define MCE_STACK 0 |
| #define N_EXCEPTION_STACKS 1 |
| |
| #ifdef CONFIG_X86_PAE |
| /* 44=32+12, the limit we can fit into an unsigned long pfn */ |
| #define __PHYSICAL_MASK_SHIFT 44 |
| #define __VIRTUAL_MASK_SHIFT 32 |
| |
| #else /* !CONFIG_X86_PAE */ |
| #define __PHYSICAL_MASK_SHIFT 32 |
| #define __VIRTUAL_MASK_SHIFT 32 |
| #endif /* CONFIG_X86_PAE */ |
| |
| /* |
| * Kernel image size is limited to 512 MB (see in arch/x86/kernel/head_32.S) |
| */ |
| #define KERNEL_IMAGE_SIZE (512 * 1024 * 1024) |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* |
| * This much address space is reserved for vmalloc() and iomap() |
| * as well as fixmap mappings. |
| */ |
| extern unsigned int __VMALLOC_RESERVE; |
| extern int sysctl_legacy_va_layout; |
| |
| extern void find_low_pfn_range(void); |
| extern void setup_bootmem_allocator(void); |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* _ASM_X86_PAGE_32_DEFS_H */ |