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#ifndef _ASM_X86_PGTABLE_32_AREAS_H #define _ASM_X86_PGTABLE_32_AREAS_H #include <asm/cpu_entry_area.h> /* * Just any arbitrary offset to the start of the vmalloc VM area: the * current 8MB value just means that there will be a 8MB "hole" after the * physical memory until the kernel virtual memory starts. That means that * any out-of-bounds memory accesses will hopefully be caught. * The vmalloc() routines leaves a hole of 4kB between each vmalloced * area for the same reason. ;) */ #define VMALLOC_OFFSET (8 * 1024 * 1024) #ifndef __ASSEMBLY__ extern bool __vmalloc_start_set; /* set once high_memory is set */ #endif #define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET) #ifdef CONFIG_X86_PAE #define LAST_PKMAP 512 #else #define LAST_PKMAP 1024 #endif #define CPU_ENTRY_AREA_PAGES (NR_CPUS * DIV_ROUND_UP(sizeof(struct cpu_entry_area), PAGE_SIZE)) /* The +1 is for the readonly IDT page: */ #define CPU_ENTRY_AREA_BASE \ ((FIXADDR_TOT_START - PAGE_SIZE*(CPU_ENTRY_AREA_PAGES+1)) & PMD_MASK) #define LDT_BASE_ADDR \ ((CPU_ENTRY_AREA_BASE - PAGE_SIZE) & PMD_MASK) #define LDT_END_ADDR (LDT_BASE_ADDR + PMD_SIZE) #define PKMAP_BASE \ ((LDT_BASE_ADDR - PAGE_SIZE) & PMD_MASK) #ifdef CONFIG_HIGHMEM # define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE) #else # define VMALLOC_END (LDT_BASE_ADDR - 2 * PAGE_SIZE) #endif #define MODULES_VADDR VMALLOC_START #define MODULES_END VMALLOC_END #define MODULES_LEN (MODULES_VADDR - MODULES_END) #define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE) #endif /* _ASM_X86_PGTABLE_32_AREAS_H */