#ifndef _ASM_X86_PAGE_32_DEFS_H #define _ASM_X86_PAGE_32_DEFS_H #include /* * 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) #ifdef CONFIG_4KSTACKS #define THREAD_ORDER 0 #else #define THREAD_ORDER 1 #endif #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 */