mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 22:53:55 +08:00
1713ce7c43
Define the layout of the data structure shared between kernel and userspace. Track the vdso address in the mm_context; needed for communicating AT_SYSINFO_EHDR to the ELF loader. Add declarations for arm_install_vdso; implementation is in a following patch. Define AT_SYSINFO_EHDR, and, if CONFIG_VDSO=y, report the vdso shared object address via the ELF auxiliary vector. Note - this adds the AT_SYSINFO_EHDR in a new user-visible header asm/auxvec.h; this is consistent with other architectures. Signed-off-by: Nathan Lynch <nathan_lynch@mentor.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
41 lines
694 B
C
41 lines
694 B
C
#ifndef __ARM_MMU_H
|
|
#define __ARM_MMU_H
|
|
|
|
#ifdef CONFIG_MMU
|
|
|
|
typedef struct {
|
|
#ifdef CONFIG_CPU_HAS_ASID
|
|
atomic64_t id;
|
|
#else
|
|
int switch_pending;
|
|
#endif
|
|
unsigned int vmalloc_seq;
|
|
unsigned long sigpage;
|
|
#ifdef CONFIG_VDSO
|
|
unsigned long vdso;
|
|
#endif
|
|
} mm_context_t;
|
|
|
|
#ifdef CONFIG_CPU_HAS_ASID
|
|
#define ASID_BITS 8
|
|
#define ASID_MASK ((~0ULL) << ASID_BITS)
|
|
#define ASID(mm) ((unsigned int)((mm)->context.id.counter & ~ASID_MASK))
|
|
#else
|
|
#define ASID(mm) (0)
|
|
#endif
|
|
|
|
#else
|
|
|
|
/*
|
|
* From nommu.h:
|
|
* Copyright (C) 2002, David McCullough <davidm@snapgear.com>
|
|
* modified for 2.6 by Hyok S. Choi <hyok.choi@samsung.com>
|
|
*/
|
|
typedef struct {
|
|
unsigned long end_brk;
|
|
} mm_context_t;
|
|
|
|
#endif
|
|
|
|
#endif
|