mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-27 13:05:03 +08:00
9d291e787b
This patch makes pgtable.h and page.h safe to include in assembly files like head.S. Allowing us to use symbolic constants instead of hard coded numbers when refering to the page tables. This patch copies asm-sparc64/const.h to asm-x86_64 to get a definition of _AC() a very convinient macro that allows us to force the type when we are compiling the code in C and to drop all of the type information when we are using the constant in assembly. Previously this was done with multiple definition of the same constant. const.h was modified slightly so that it works when given CONFIG options as arguments. This patch adds #ifndef __ASSEMBLY__ ... #endif and _AC(1,UL) where appropriate so the assembler won't choke on the header files. Otherwise nothing should have changed. AK: added const.h to exported headers to fix headers_check Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de>
136 lines
4.1 KiB
C
136 lines
4.1 KiB
C
#ifndef _X86_64_PAGE_H
|
|
#define _X86_64_PAGE_H
|
|
|
|
#include <asm/const.h>
|
|
|
|
/* PAGE_SHIFT determines the page size */
|
|
#define PAGE_SHIFT 12
|
|
#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
#define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & __PHYSICAL_MASK)
|
|
|
|
#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 LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
|
|
#define LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT)
|
|
|
|
#define HPAGE_SHIFT PMD_SHIFT
|
|
#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
|
|
#ifdef __KERNEL__
|
|
#ifndef __ASSEMBLY__
|
|
|
|
extern unsigned long end_pfn;
|
|
|
|
void clear_page(void *);
|
|
void copy_page(void *, void *);
|
|
|
|
#define clear_user_page(page, vaddr, pg) clear_page(page)
|
|
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
|
|
|
|
#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
|
|
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
typedef struct { unsigned long pmd; } pmd_t;
|
|
typedef struct { unsigned long pud; } pud_t;
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
#define PTE_MASK PHYSICAL_PAGE_MASK
|
|
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
|
|
#define pte_val(x) ((x).pte)
|
|
#define pmd_val(x) ((x).pmd)
|
|
#define pud_val(x) ((x).pud)
|
|
#define pgd_val(x) ((x).pgd)
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#define __pmd(x) ((pmd_t) { (x) } )
|
|
#define __pud(x) ((pud_t) { (x) } )
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#define __PHYSICAL_START CONFIG_PHYSICAL_START
|
|
#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
|
|
#define __START_KERNEL_map 0xffffffff80000000
|
|
#define __PAGE_OFFSET 0xffff810000000000
|
|
|
|
/* to align the pointer to the (next) page boundary */
|
|
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
|
|
|
|
/* See Documentation/x86_64/mm.txt for a description of the memory map. */
|
|
#define __PHYSICAL_MASK_SHIFT 46
|
|
#define __PHYSICAL_MASK ((_AC(1,UL) << __PHYSICAL_MASK_SHIFT) - 1)
|
|
#define __VIRTUAL_MASK_SHIFT 48
|
|
#define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1)
|
|
|
|
#define KERNEL_TEXT_SIZE (40*1024*1024)
|
|
#define KERNEL_TEXT_START 0xffffffff80000000
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/bug.h>
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#define PAGE_OFFSET __PAGE_OFFSET
|
|
|
|
/* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
|
|
Otherwise you risk miscompilation. */
|
|
#define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET)
|
|
/* __pa_symbol should be used for C visible symbols.
|
|
This seems to be the official gcc blessed way to do such arithmetic. */
|
|
#define __pa_symbol(x) \
|
|
({unsigned long v; \
|
|
asm("" : "=r" (v) : "0" (x)); \
|
|
__pa(v); })
|
|
|
|
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
|
|
#define __boot_va(x) __va(x)
|
|
#define __boot_pa(x) __pa(x)
|
|
#ifdef CONFIG_FLATMEM
|
|
#define pfn_valid(pfn) ((pfn) < end_pfn)
|
|
#endif
|
|
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS \
|
|
(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
|
|
VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#define __HAVE_ARCH_GATE_AREA 1
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/page.h>
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _X86_64_PAGE_H */
|