cc61503219
When end_pfn is not aligned to 2MB (or 1GB) then the kernel might map more memory than end_pfn. Account this in max_pfn_mapped. Signed-off-by: Andi Kleen <ak@suse.de> Cc: andreas.herrmann3@amd.com Cc: mingo@elte.hu Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
#ifndef _X86_64_PAGE_H
|
|
#define _X86_64_PAGE_H
|
|
|
|
#define PAGETABLE_LEVELS 4
|
|
|
|
#define THREAD_ORDER 1
|
|
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
|
|
#define CURRENT_MASK (~(THREAD_SIZE - 1))
|
|
|
|
#define EXCEPTION_STACK_ORDER 0
|
|
#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
|
|
|
|
#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
|
|
#define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
|
|
|
|
#define IRQSTACK_ORDER 2
|
|
#define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
|
|
|
|
#define STACKFAULT_STACK 1
|
|
#define DOUBLEFAULT_STACK 2
|
|
#define NMI_STACK 3
|
|
#define DEBUG_STACK 4
|
|
#define MCE_STACK 5
|
|
#define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
|
|
|
|
#define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT)
|
|
#define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1))
|
|
|
|
#define __PAGE_OFFSET _AC(0xffff810000000000, UL)
|
|
|
|
#define __PHYSICAL_START CONFIG_PHYSICAL_START
|
|
#define __KERNEL_ALIGN 0x200000
|
|
|
|
/*
|
|
* Make sure kernel is aligned to 2MB address. Catching it at compile
|
|
* time is better. Change your config file and compile the kernel
|
|
* for a 2MB aligned address (CONFIG_PHYSICAL_START)
|
|
*/
|
|
#if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
|
|
#error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
|
|
#endif
|
|
|
|
#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
|
|
#define __START_KERNEL_map _AC(0xffffffff80000000, UL)
|
|
|
|
/* See Documentation/x86_64/mm.txt for a description of the memory map. */
|
|
#define __PHYSICAL_MASK_SHIFT 46
|
|
#define __VIRTUAL_MASK_SHIFT 48
|
|
|
|
/*
|
|
* Kernel image size is limited to 512 MB (see level2_kernel_pgt in
|
|
* arch/x86/kernel/head_64.S), and it is mapped here:
|
|
*/
|
|
#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024)
|
|
#define KERNEL_IMAGE_START _AC(0xffffffff80000000, UL)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
void clear_page(void *page);
|
|
void copy_page(void *to, void *from);
|
|
|
|
extern unsigned long end_pfn;
|
|
extern unsigned long phys_base;
|
|
|
|
extern unsigned long __phys_addr(unsigned long);
|
|
#define __phys_reloc_hide(x) (x)
|
|
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
typedef unsigned long pteval_t;
|
|
typedef unsigned long pmdval_t;
|
|
typedef unsigned long pudval_t;
|
|
typedef unsigned long pgdval_t;
|
|
typedef unsigned long pgprotval_t;
|
|
typedef unsigned long phys_addr_t;
|
|
|
|
typedef struct page *pgtable_t;
|
|
|
|
typedef struct { pteval_t pte; } pte_t;
|
|
|
|
#define vmemmap ((struct page *)VMEMMAP_START)
|
|
|
|
extern unsigned long init_memory_mapping(unsigned long start,
|
|
unsigned long end);
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#ifdef CONFIG_FLATMEM
|
|
#define pfn_valid(pfn) ((pfn) < end_pfn)
|
|
#endif
|
|
|
|
|
|
#endif /* _X86_64_PAGE_H */
|