259 lines
6.4 KiB
C
259 lines
6.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#ifndef __ASM_CSKY_PGTABLE_H
|
|
#define __ASM_CSKY_PGTABLE_H
|
|
|
|
#include <asm/fixmap.h>
|
|
#include <asm/memory.h>
|
|
#include <asm/addrspace.h>
|
|
#include <abi/pgtable-bits.h>
|
|
#include <asm-generic/pgtable-nopmd.h>
|
|
|
|
#define PGDIR_SHIFT 22
|
|
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
|
|
#define PGDIR_MASK (~(PGDIR_SIZE-1))
|
|
|
|
#define USER_PTRS_PER_PGD (PAGE_OFFSET/PGDIR_SIZE)
|
|
|
|
/*
|
|
* C-SKY is two-level paging structure:
|
|
*/
|
|
|
|
#define PTRS_PER_PGD (PAGE_SIZE / sizeof(pgd_t))
|
|
#define PTRS_PER_PMD 1
|
|
#define PTRS_PER_PTE (PAGE_SIZE / sizeof(pte_t))
|
|
|
|
#define pte_ERROR(e) \
|
|
pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low)
|
|
#define pgd_ERROR(e) \
|
|
pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
|
|
|
|
#define pmd_pfn(pmd) (pmd_phys(pmd) >> PAGE_SHIFT)
|
|
#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
|
|
#define pte_clear(mm, addr, ptep) set_pte((ptep), \
|
|
(((unsigned int) addr >= PAGE_OFFSET) ? __pte(_PAGE_GLOBAL) : __pte(0)))
|
|
#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
|
|
#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
|
|
#define pte_pfn(x) ((unsigned long)((x).pte_low >> PAGE_SHIFT))
|
|
#define pfn_pte(pfn, prot) __pte(((unsigned long long)(pfn) << PAGE_SHIFT) \
|
|
| pgprot_val(prot))
|
|
|
|
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
|
|
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
|
|
|
|
#define pte_page(x) pfn_to_page(pte_pfn(x))
|
|
#define __mk_pte(page_nr, pgprot) __pte(((page_nr) << PAGE_SHIFT) | \
|
|
pgprot_val(pgprot))
|
|
|
|
/*
|
|
* C-SKY only has VALID and DIRTY bit in hardware. So we need to use the
|
|
* two bits emulate PRESENT, READ, WRITE, EXEC, MODIFIED, ACCESSED.
|
|
*/
|
|
#define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED)
|
|
|
|
#define PAGE_NONE __pgprot(_PAGE_PROT_NONE)
|
|
#define PAGE_READ __pgprot(_PAGE_BASE | _PAGE_READ | \
|
|
_CACHE_CACHED)
|
|
#define PAGE_WRITE __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_WRITE | \
|
|
_CACHE_CACHED)
|
|
#define PAGE_SHARED PAGE_WRITE
|
|
|
|
#define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_VALID | \
|
|
_PAGE_WRITE | _PAGE_DIRTY | _PAGE_MODIFIED | \
|
|
_PAGE_GLOBAL | \
|
|
_CACHE_CACHED)
|
|
|
|
#define _PAGE_IOREMAP (_PAGE_BASE | _PAGE_READ | _PAGE_VALID | \
|
|
_PAGE_WRITE | _PAGE_DIRTY | _PAGE_MODIFIED | \
|
|
_PAGE_GLOBAL | \
|
|
_CACHE_UNCACHED | _PAGE_SO)
|
|
|
|
#define _PAGE_CHG_MASK (~(unsigned long) \
|
|
(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
|
|
_CACHE_MASK | _PAGE_GLOBAL))
|
|
|
|
#define MAX_SWAPFILES_CHECK() \
|
|
BUILD_BUG_ON(MAX_SWAPFILES_SHIFT != 5)
|
|
|
|
extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
|
|
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
|
|
|
|
extern void load_pgd(unsigned long pg_dir);
|
|
extern pte_t invalid_pte_table[PTRS_PER_PTE];
|
|
|
|
static inline void set_pte(pte_t *p, pte_t pte)
|
|
{
|
|
*p = pte;
|
|
#if defined(CONFIG_CPU_NEED_TLBSYNC)
|
|
dcache_wb_line((u32)p);
|
|
#endif
|
|
/* prevent out of order excution */
|
|
smp_mb();
|
|
}
|
|
#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
|
|
|
|
static inline pte_t *pmd_page_vaddr(pmd_t pmd)
|
|
{
|
|
unsigned long ptr;
|
|
|
|
ptr = pmd_val(pmd);
|
|
|
|
return __va(ptr);
|
|
}
|
|
|
|
#define pmd_phys(pmd) pmd_val(pmd)
|
|
|
|
static inline void set_pmd(pmd_t *p, pmd_t pmd)
|
|
{
|
|
*p = pmd;
|
|
#if defined(CONFIG_CPU_NEED_TLBSYNC)
|
|
dcache_wb_line((u32)p);
|
|
#endif
|
|
/* prevent specul excute */
|
|
smp_mb();
|
|
}
|
|
|
|
|
|
static inline int pmd_none(pmd_t pmd)
|
|
{
|
|
return pmd_val(pmd) == __pa(invalid_pte_table);
|
|
}
|
|
|
|
#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
|
|
|
|
static inline int pmd_present(pmd_t pmd)
|
|
{
|
|
return (pmd_val(pmd) != __pa(invalid_pte_table));
|
|
}
|
|
|
|
static inline void pmd_clear(pmd_t *p)
|
|
{
|
|
pmd_val(*p) = (__pa(invalid_pte_table));
|
|
#if defined(CONFIG_CPU_NEED_TLBSYNC)
|
|
dcache_wb_line((u32)p);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* The following only work if pte_present() is true.
|
|
* Undefined behaviour if not..
|
|
*/
|
|
static inline int pte_read(pte_t pte)
|
|
{
|
|
return pte.pte_low & _PAGE_READ;
|
|
}
|
|
|
|
static inline int pte_write(pte_t pte)
|
|
{
|
|
return (pte).pte_low & _PAGE_WRITE;
|
|
}
|
|
|
|
static inline int pte_dirty(pte_t pte)
|
|
{
|
|
return (pte).pte_low & _PAGE_MODIFIED;
|
|
}
|
|
|
|
static inline int pte_young(pte_t pte)
|
|
{
|
|
return (pte).pte_low & _PAGE_ACCESSED;
|
|
}
|
|
|
|
static inline pte_t pte_wrprotect(pte_t pte)
|
|
{
|
|
pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_DIRTY);
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkclean(pte_t pte)
|
|
{
|
|
pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_DIRTY);
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkold(pte_t pte)
|
|
{
|
|
pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_VALID);
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkwrite(pte_t pte)
|
|
{
|
|
pte_val(pte) |= _PAGE_WRITE;
|
|
if (pte_val(pte) & _PAGE_MODIFIED)
|
|
pte_val(pte) |= _PAGE_DIRTY;
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkdirty(pte_t pte)
|
|
{
|
|
pte_val(pte) |= _PAGE_MODIFIED;
|
|
if (pte_val(pte) & _PAGE_WRITE)
|
|
pte_val(pte) |= _PAGE_DIRTY;
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkyoung(pte_t pte)
|
|
{
|
|
pte_val(pte) |= _PAGE_ACCESSED;
|
|
if (pte_val(pte) & _PAGE_READ)
|
|
pte_val(pte) |= _PAGE_VALID;
|
|
return pte;
|
|
}
|
|
|
|
#define __HAVE_PHYS_MEM_ACCESS_PROT
|
|
struct file;
|
|
extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
|
|
unsigned long size, pgprot_t vma_prot);
|
|
|
|
/*
|
|
* Macro to make mark a page protection value as "uncacheable". Note
|
|
* that "protection" is really a misnomer here as the protection value
|
|
* contains the memory attribute bits, dirty bits, and various other
|
|
* bits as well.
|
|
*/
|
|
#define pgprot_noncached pgprot_noncached
|
|
|
|
static inline pgprot_t pgprot_noncached(pgprot_t _prot)
|
|
{
|
|
unsigned long prot = pgprot_val(_prot);
|
|
|
|
prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED | _PAGE_SO;
|
|
|
|
return __pgprot(prot);
|
|
}
|
|
|
|
#define pgprot_writecombine pgprot_writecombine
|
|
static inline pgprot_t pgprot_writecombine(pgprot_t _prot)
|
|
{
|
|
unsigned long prot = pgprot_val(_prot);
|
|
|
|
prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED;
|
|
|
|
return __pgprot(prot);
|
|
}
|
|
|
|
/*
|
|
* Conversion functions: convert a page and protection to a page entry,
|
|
* and a page entry and page directory to the page they refer to.
|
|
*/
|
|
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
|
|
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
|
|
{
|
|
return __pte((pte_val(pte) & _PAGE_CHG_MASK) |
|
|
(pgprot_val(newprot)));
|
|
}
|
|
|
|
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
|
|
extern void paging_init(void);
|
|
|
|
void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
|
|
pte_t *pte);
|
|
|
|
/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
|
|
#define kern_addr_valid(addr) (1)
|
|
|
|
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
|
|
remap_pfn_range(vma, vaddr, pfn, size, prot)
|
|
|
|
#endif /* __ASM_CSKY_PGTABLE_H */
|