mirror of
https://github.com/torvalds/linux.git
synced 2024-11-19 18:41:48 +00:00
da02877987
This patch modifies the pgd/pmd/pte manipulation functions to support the 3-level page table format. Since there is no need for an 'ext' argument to cpu_set_pte_ext(), this patch conditionally defines a different prototype for this function when CONFIG_ARM_LPAE. The patch also introduces the L_PGD_SWAPPER flag to mark pgd entries pointing to pmd tables pre-allocated in the swapper_pg_dir and avoid trying to free them at run-time. This flag is 0 with the classic page table format. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
145 lines
3.4 KiB
C
145 lines
3.4 KiB
C
/*
|
|
* arch/arm/include/asm/proc-fns.h
|
|
*
|
|
* Copyright (C) 1997-1999 Russell King
|
|
* Copyright (C) 2000 Deep Blue Solutions Ltd
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#ifndef __ASM_PROCFNS_H
|
|
#define __ASM_PROCFNS_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/glue-proc.h>
|
|
#include <asm/page.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
struct mm_struct;
|
|
|
|
/*
|
|
* Don't change this structure - ASM code relies on it.
|
|
*/
|
|
extern struct processor {
|
|
/* MISC
|
|
* get data abort address/flags
|
|
*/
|
|
void (*_data_abort)(unsigned long pc);
|
|
/*
|
|
* Retrieve prefetch fault address
|
|
*/
|
|
unsigned long (*_prefetch_abort)(unsigned long lr);
|
|
/*
|
|
* Set up any processor specifics
|
|
*/
|
|
void (*_proc_init)(void);
|
|
/*
|
|
* Disable any processor specifics
|
|
*/
|
|
void (*_proc_fin)(void);
|
|
/*
|
|
* Special stuff for a reset
|
|
*/
|
|
void (*reset)(unsigned long addr) __attribute__((noreturn));
|
|
/*
|
|
* Idle the processor
|
|
*/
|
|
int (*_do_idle)(void);
|
|
/*
|
|
* Processor architecture specific
|
|
*/
|
|
/*
|
|
* clean a virtual address range from the
|
|
* D-cache without flushing the cache.
|
|
*/
|
|
void (*dcache_clean_area)(void *addr, int size);
|
|
|
|
/*
|
|
* Set the page table
|
|
*/
|
|
void (*switch_mm)(unsigned long pgd_phys, struct mm_struct *mm);
|
|
/*
|
|
* Set a possibly extended PTE. Non-extended PTEs should
|
|
* ignore 'ext'.
|
|
*/
|
|
#ifdef CONFIG_ARM_LPAE
|
|
void (*set_pte_ext)(pte_t *ptep, pte_t pte);
|
|
#else
|
|
void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext);
|
|
#endif
|
|
|
|
/* Suspend/resume */
|
|
unsigned int suspend_size;
|
|
void (*do_suspend)(void *);
|
|
void (*do_resume)(void *);
|
|
} processor;
|
|
|
|
#ifndef MULTI_CPU
|
|
extern void cpu_proc_init(void);
|
|
extern void cpu_proc_fin(void);
|
|
extern int cpu_do_idle(void);
|
|
extern void cpu_dcache_clean_area(void *, int);
|
|
extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm);
|
|
#ifdef CONFIG_ARM_LPAE
|
|
extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte);
|
|
#else
|
|
extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
|
|
#endif
|
|
extern void cpu_reset(unsigned long addr) __attribute__((noreturn));
|
|
|
|
/* These three are private to arch/arm/kernel/suspend.c */
|
|
extern void cpu_do_suspend(void *);
|
|
extern void cpu_do_resume(void *);
|
|
#else
|
|
#define cpu_proc_init processor._proc_init
|
|
#define cpu_proc_fin processor._proc_fin
|
|
#define cpu_reset processor.reset
|
|
#define cpu_do_idle processor._do_idle
|
|
#define cpu_dcache_clean_area processor.dcache_clean_area
|
|
#define cpu_set_pte_ext processor.set_pte_ext
|
|
#define cpu_do_switch_mm processor.switch_mm
|
|
|
|
/* These three are private to arch/arm/kernel/suspend.c */
|
|
#define cpu_do_suspend processor.do_suspend
|
|
#define cpu_do_resume processor.do_resume
|
|
#endif
|
|
|
|
extern void cpu_resume(void);
|
|
|
|
#include <asm/memory.h>
|
|
|
|
#ifdef CONFIG_MMU
|
|
|
|
#define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
|
|
|
|
#ifdef CONFIG_ARM_LPAE
|
|
#define cpu_get_pgd() \
|
|
({ \
|
|
unsigned long pg, pg2; \
|
|
__asm__("mrrc p15, 0, %0, %1, c2" \
|
|
: "=r" (pg), "=r" (pg2) \
|
|
: \
|
|
: "cc"); \
|
|
pg &= ~(PTRS_PER_PGD*sizeof(pgd_t)-1); \
|
|
(pgd_t *)phys_to_virt(pg); \
|
|
})
|
|
#else
|
|
#define cpu_get_pgd() \
|
|
({ \
|
|
unsigned long pg; \
|
|
__asm__("mrc p15, 0, %0, c2, c0, 0" \
|
|
: "=r" (pg) : : "cc"); \
|
|
pg &= ~0x3fff; \
|
|
(pgd_t *)phys_to_virt(pg); \
|
|
})
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __ASM_PROCFNS_H */
|