https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: f6cede5b49e822ebc41a099fe41ab4989f64e2cb authored by Linus Torvalds on 06 March 2016, 22:48:03 UTC
Linux 4.5-rc7
Linux 4.5-rc7
Tip revision: f6cede5
mmu.h
#ifndef __MMU_H
#define __MMU_H
#ifdef CONFIG_METAG_USER_TCM
#include <linux/list.h>
#endif
#ifdef CONFIG_HUGETLB_PAGE
#include <asm/page.h>
#endif
typedef struct {
/* Software pgd base pointer used for Meta 1.x MMU. */
unsigned long pgd_base;
#ifdef CONFIG_METAG_USER_TCM
struct list_head tcm;
#endif
#ifdef CONFIG_HUGETLB_PAGE
#if HPAGE_SHIFT < HUGEPT_SHIFT
/* last partially filled huge page table address */
unsigned long part_huge;
#endif
#endif
} mm_context_t;
/* Given a virtual address, return the pte for the top level 4meg entry
* that maps that address.
* Returns 0 (an empty pte) if that range is not mapped.
*/
unsigned long mmu_read_first_level_page(unsigned long vaddr);
/* Given a linear (virtual) address, return the second level 4k pte
* that maps that address. Returns 0 if the address is not mapped.
*/
unsigned long mmu_read_second_level_page(unsigned long vaddr);
/* Get the virtual base address of the MMU */
unsigned long mmu_get_base(void);
/* Initialize the MMU. */
void mmu_init(unsigned long mem_end);
#ifdef CONFIG_METAG_META21_MMU
/*
* For cpu "cpu" calculate and return the address of the
* MMCU_TnLOCAL_TABLE_PHYS0 if running in local-space or
* MMCU_TnGLOBAL_TABLE_PHYS0 if running in global-space.
*/
static inline unsigned long mmu_phys0_addr(unsigned int cpu)
{
unsigned long phys0;
phys0 = (MMCU_T0LOCAL_TABLE_PHYS0 +
(MMCU_TnX_TABLE_PHYSX_STRIDE * cpu)) +
(MMCU_TXG_TABLE_PHYSX_OFFSET * is_global_space(PAGE_OFFSET));
return phys0;
}
/*
* For cpu "cpu" calculate and return the address of the
* MMCU_TnLOCAL_TABLE_PHYS1 if running in local-space or
* MMCU_TnGLOBAL_TABLE_PHYS1 if running in global-space.
*/
static inline unsigned long mmu_phys1_addr(unsigned int cpu)
{
unsigned long phys1;
phys1 = (MMCU_T0LOCAL_TABLE_PHYS1 +
(MMCU_TnX_TABLE_PHYSX_STRIDE * cpu)) +
(MMCU_TXG_TABLE_PHYSX_OFFSET * is_global_space(PAGE_OFFSET));
return phys1;
}
#endif /* CONFIG_METAG_META21_MMU */
#endif