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185 lines
6.4 KiB
185 lines
6.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _SUN3_PGTABLE_H |
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#define _SUN3_PGTABLE_H |
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#include <asm/sun3mmu.h> |
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#ifndef __ASSEMBLY__ |
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#include <asm/virtconvert.h> |
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#include <linux/linkage.h> |
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/* |
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* This file contains all the things which change drastically for the sun3 |
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* pagetable stuff, to avoid making too much of a mess of the generic m68k |
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* `pgtable.h'; this should only be included from the generic file. --m |
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*/ |
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/* For virtual address to physical address conversion */ |
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#define VTOP(addr) __pa(addr) |
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#define PTOV(addr) __va(addr) |
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#endif /* !__ASSEMBLY__ */ |
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/* These need to be defined for compatibility although the sun3 doesn't use them */ |
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#define _PAGE_NOCACHE030 0x040 |
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#define _CACHEMASK040 (~0x060) |
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#define _PAGE_NOCACHE_S 0x040 |
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/* Page protection values within PTE. */ |
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#define SUN3_PAGE_VALID (0x80000000) |
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#define SUN3_PAGE_WRITEABLE (0x40000000) |
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#define SUN3_PAGE_SYSTEM (0x20000000) |
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#define SUN3_PAGE_NOCACHE (0x10000000) |
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#define SUN3_PAGE_ACCESSED (0x02000000) |
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#define SUN3_PAGE_MODIFIED (0x01000000) |
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/* Externally used page protection values. */ |
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#define _PAGE_PRESENT (SUN3_PAGE_VALID) |
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#define _PAGE_ACCESSED (SUN3_PAGE_ACCESSED) |
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/* Compound page protection values. */ |
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//todo: work out which ones *should* have SUN3_PAGE_NOCACHE and fix... |
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// is it just PAGE_KERNEL and PAGE_SHARED? |
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#define PAGE_NONE __pgprot(SUN3_PAGE_VALID \ |
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| SUN3_PAGE_ACCESSED \ |
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| SUN3_PAGE_NOCACHE) |
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#define PAGE_SHARED __pgprot(SUN3_PAGE_VALID \ |
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| SUN3_PAGE_WRITEABLE \ |
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| SUN3_PAGE_ACCESSED \ |
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| SUN3_PAGE_NOCACHE) |
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#define PAGE_COPY __pgprot(SUN3_PAGE_VALID \ |
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| SUN3_PAGE_ACCESSED \ |
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| SUN3_PAGE_NOCACHE) |
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#define PAGE_READONLY __pgprot(SUN3_PAGE_VALID \ |
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| SUN3_PAGE_ACCESSED \ |
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| SUN3_PAGE_NOCACHE) |
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#define PAGE_KERNEL __pgprot(SUN3_PAGE_VALID \ |
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| SUN3_PAGE_WRITEABLE \ |
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| SUN3_PAGE_SYSTEM \ |
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| SUN3_PAGE_NOCACHE \ |
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| SUN3_PAGE_ACCESSED \ |
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| SUN3_PAGE_MODIFIED) |
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#define PAGE_INIT __pgprot(SUN3_PAGE_VALID \ |
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| SUN3_PAGE_WRITEABLE \ |
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| SUN3_PAGE_SYSTEM \ |
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| SUN3_PAGE_NOCACHE) |
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/* |
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* Page protections for initialising protection_map. The sun3 has only two |
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* protection settings, valid (implying read and execute) and writeable. These |
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* are as close as we can get... |
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*/ |
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#define __P000 PAGE_NONE |
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#define __P001 PAGE_READONLY |
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#define __P010 PAGE_COPY |
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#define __P011 PAGE_COPY |
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#define __P100 PAGE_READONLY |
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#define __P101 PAGE_READONLY |
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#define __P110 PAGE_COPY |
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#define __P111 PAGE_COPY |
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#define __S000 PAGE_NONE |
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#define __S001 PAGE_READONLY |
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#define __S010 PAGE_SHARED |
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#define __S011 PAGE_SHARED |
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#define __S100 PAGE_READONLY |
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#define __S101 PAGE_READONLY |
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#define __S110 PAGE_SHARED |
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#define __S111 PAGE_SHARED |
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/* Use these fake page-protections on PMDs. */ |
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#define SUN3_PMD_VALID (0x00000001) |
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#define SUN3_PMD_MASK (0x0000003F) |
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#define SUN3_PMD_MAGIC (0x0000002B) |
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#ifndef __ASSEMBLY__ |
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/* |
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* Conversion functions: convert a page and protection to a page entry, |
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* and a page entry and page directory to the page they refer to. |
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*/ |
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#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
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static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
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{ |
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pte_val(pte) = (pte_val(pte) & SUN3_PAGE_CHG_MASK) | pgprot_val(newprot); |
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return pte; |
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} |
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#define pmd_set(pmdp,ptep) do {} while (0) |
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#define __pte_page(pte) \ |
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((unsigned long) __va ((pte_val (pte) & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT)) |
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static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
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{ |
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return (unsigned long)__va(pmd_val(pmd) & PAGE_MASK); |
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} |
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static inline int pte_none (pte_t pte) { return !pte_val (pte); } |
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static inline int pte_present (pte_t pte) { return pte_val (pte) & SUN3_PAGE_VALID; } |
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static inline void pte_clear (struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
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{ |
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pte_val (*ptep) = 0; |
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} |
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#define pte_pfn(pte) (pte_val(pte) & SUN3_PAGE_PGNUM_MASK) |
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#define pfn_pte(pfn, pgprot) \ |
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({ pte_t __pte; pte_val(__pte) = pfn | pgprot_val(pgprot); __pte; }) |
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#define pte_page(pte) virt_to_page(__pte_page(pte)) |
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#define pmd_page(pmd) virt_to_page(pmd_page_vaddr(pmd)) |
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static inline int pmd_none2 (pmd_t *pmd) { return !pmd_val (*pmd); } |
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#define pmd_none(pmd) pmd_none2(&(pmd)) |
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//static inline int pmd_bad (pmd_t pmd) { return (pmd_val (pmd) & SUN3_PMD_MASK) != SUN3_PMD_MAGIC; } |
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static inline int pmd_bad2 (pmd_t *pmd) { return 0; } |
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#define pmd_bad(pmd) pmd_bad2(&(pmd)) |
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static inline int pmd_present2 (pmd_t *pmd) { return pmd_val (*pmd) & SUN3_PMD_VALID; } |
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/* #define pmd_present(pmd) pmd_present2(&(pmd)) */ |
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#define pmd_present(pmd) (!pmd_none2(&(pmd))) |
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static inline void pmd_clear (pmd_t *pmdp) { pmd_val (*pmdp) = 0; } |
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#define pte_ERROR(e) \ |
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pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) |
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#define pgd_ERROR(e) \ |
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pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) |
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/* |
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* The following only work if pte_present() is true. |
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* Undefined behaviour if not... |
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* [we have the full set here even if they don't change from m68k] |
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*/ |
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static inline int pte_write(pte_t pte) { return pte_val(pte) & SUN3_PAGE_WRITEABLE; } |
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static inline int pte_dirty(pte_t pte) { return pte_val(pte) & SUN3_PAGE_MODIFIED; } |
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static inline int pte_young(pte_t pte) { return pte_val(pte) & SUN3_PAGE_ACCESSED; } |
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static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_WRITEABLE; return pte; } |
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static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_MODIFIED; return pte; } |
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static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_ACCESSED; return pte; } |
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static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= SUN3_PAGE_WRITEABLE; return pte; } |
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static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= SUN3_PAGE_MODIFIED; return pte; } |
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static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= SUN3_PAGE_ACCESSED; return pte; } |
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static inline pte_t pte_mknocache(pte_t pte) { pte_val(pte) |= SUN3_PAGE_NOCACHE; return pte; } |
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// use this version when caches work... |
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//static inline pte_t pte_mkcache(pte_t pte) { pte_val(pte) &= SUN3_PAGE_NOCACHE; return pte; } |
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// until then, use: |
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static inline pte_t pte_mkcache(pte_t pte) { return pte; } |
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extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; |
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extern pgd_t kernel_pg_dir[PTRS_PER_PGD]; |
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/* Macros to (de)construct the fake PTEs representing swap pages. */ |
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#define __swp_type(x) ((x).val & 0x7F) |
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#define __swp_offset(x) (((x).val) >> 7) |
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#define __swp_entry(type,offset) ((swp_entry_t) { ((type) | ((offset) << 7)) }) |
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#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) |
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#define __swp_entry_to_pte(x) ((pte_t) { (x).val }) |
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#endif /* !__ASSEMBLY__ */ |
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#endif /* !_SUN3_PGTABLE_H */
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