1186525bdSIngo Molnar #ifndef _ASM_X86_PGTABLE_32_AREAS_H 2186525bdSIngo Molnar #define _ASM_X86_PGTABLE_32_AREAS_H 3186525bdSIngo Molnar 4186525bdSIngo Molnar #include <asm/cpu_entry_area.h> 5186525bdSIngo Molnar 6186525bdSIngo Molnar /* 7186525bdSIngo Molnar * Just any arbitrary offset to the start of the vmalloc VM area: the 8186525bdSIngo Molnar * current 8MB value just means that there will be a 8MB "hole" after the 9186525bdSIngo Molnar * physical memory until the kernel virtual memory starts. That means that 10186525bdSIngo Molnar * any out-of-bounds memory accesses will hopefully be caught. 11186525bdSIngo Molnar * The vmalloc() routines leaves a hole of 4kB between each vmalloced 12186525bdSIngo Molnar * area for the same reason. ;) 13186525bdSIngo Molnar */ 14186525bdSIngo Molnar #define VMALLOC_OFFSET (8 * 1024 * 1024) 15186525bdSIngo Molnar 16*24a295e4SThomas Huth #ifndef __ASSEMBLER__ 17186525bdSIngo Molnar extern bool __vmalloc_start_set; /* set once high_memory is set */ 18186525bdSIngo Molnar #endif 19186525bdSIngo Molnar 20186525bdSIngo Molnar #define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET) 21186525bdSIngo Molnar #ifdef CONFIG_X86_PAE 22186525bdSIngo Molnar #define LAST_PKMAP 512 23186525bdSIngo Molnar #else 24186525bdSIngo Molnar #define LAST_PKMAP 1024 25186525bdSIngo Molnar #endif 26186525bdSIngo Molnar 27186525bdSIngo Molnar #define CPU_ENTRY_AREA_PAGES (NR_CPUS * DIV_ROUND_UP(sizeof(struct cpu_entry_area), PAGE_SIZE)) 28186525bdSIngo Molnar 29186525bdSIngo Molnar /* The +1 is for the readonly IDT page: */ 30186525bdSIngo Molnar #define CPU_ENTRY_AREA_BASE \ 31186525bdSIngo Molnar ((FIXADDR_TOT_START - PAGE_SIZE*(CPU_ENTRY_AREA_PAGES+1)) & PMD_MASK) 32186525bdSIngo Molnar 33186525bdSIngo Molnar #define LDT_BASE_ADDR \ 34186525bdSIngo Molnar ((CPU_ENTRY_AREA_BASE - PAGE_SIZE) & PMD_MASK) 35186525bdSIngo Molnar 36186525bdSIngo Molnar #define LDT_END_ADDR (LDT_BASE_ADDR + PMD_SIZE) 37186525bdSIngo Molnar 38186525bdSIngo Molnar #define PKMAP_BASE \ 39186525bdSIngo Molnar ((LDT_BASE_ADDR - PAGE_SIZE) & PMD_MASK) 40186525bdSIngo Molnar 41186525bdSIngo Molnar #ifdef CONFIG_HIGHMEM 42186525bdSIngo Molnar # define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE) 43186525bdSIngo Molnar #else 44186525bdSIngo Molnar # define VMALLOC_END (LDT_BASE_ADDR - 2 * PAGE_SIZE) 45186525bdSIngo Molnar #endif 46186525bdSIngo Molnar 47186525bdSIngo Molnar #define MODULES_VADDR VMALLOC_START 48186525bdSIngo Molnar #define MODULES_END VMALLOC_END 49186525bdSIngo Molnar #define MODULES_LEN (MODULES_VADDR - MODULES_END) 50186525bdSIngo Molnar 51186525bdSIngo Molnar #define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE) 52186525bdSIngo Molnar 53186525bdSIngo Molnar #endif /* _ASM_X86_PGTABLE_32_AREAS_H */ 54