62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_PAGE_64_H
|
|
#define _ASM_X86_PAGE_64_H
|
|
|
|
#include <asm/page_64_types.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/alternative.h>
|
|
|
|
/* duplicated to the one in bootmem.h */
|
|
extern unsigned long max_pfn;
|
|
extern unsigned long phys_base;
|
|
|
|
static inline unsigned long __phys_addr_nodebug(unsigned long x)
|
|
{
|
|
unsigned long y = x - __START_KERNEL_map;
|
|
|
|
/* use the carry flag to determine if x was < __START_KERNEL_map */
|
|
x = y + ((x > y) ? phys_base : (__START_KERNEL_map - PAGE_OFFSET));
|
|
|
|
return x;
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_VIRTUAL
|
|
extern unsigned long __phys_addr(unsigned long);
|
|
extern unsigned long __phys_addr_symbol(unsigned long);
|
|
#else
|
|
#define __phys_addr(x) __phys_addr_nodebug(x)
|
|
#define __phys_addr_symbol(x) \
|
|
((unsigned long)(x) - __START_KERNEL_map + phys_base)
|
|
#endif
|
|
|
|
#define __phys_reloc_hide(x) (x)
|
|
|
|
#ifdef CONFIG_FLATMEM
|
|
#define pfn_valid(pfn) ((pfn) < max_pfn)
|
|
#endif
|
|
|
|
void clear_page_orig(void *page);
|
|
void clear_page_rep(void *page);
|
|
void clear_page_erms(void *page);
|
|
|
|
static inline void clear_page(void *page)
|
|
{
|
|
alternative_call_2(clear_page_orig,
|
|
clear_page_rep, X86_FEATURE_REP_GOOD,
|
|
clear_page_erms, X86_FEATURE_ERMS,
|
|
"=D" (page),
|
|
"0" (page)
|
|
: "memory", "rax", "rcx");
|
|
}
|
|
|
|
void copy_page(void *to, void *from);
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#ifdef CONFIG_X86_VSYSCALL_EMULATION
|
|
# define __HAVE_ARCH_GATE_AREA 1
|
|
#endif
|
|
|
|
#endif /* _ASM_X86_PAGE_64_H */
|