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Diffstat (limited to 'arch/unicore32/include/asm/pgtable.h')
| -rw-r--r-- | arch/unicore32/include/asm/pgtable.h | 267 |
1 files changed, 0 insertions, 267 deletions
diff --git a/arch/unicore32/include/asm/pgtable.h b/arch/unicore32/include/asm/pgtable.h deleted file mode 100644 index 97f564c8ecba..000000000000 --- a/arch/unicore32/include/asm/pgtable.h +++ /dev/null @@ -1,267 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/unicore32/include/asm/pgtable.h - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#ifndef __UNICORE_PGTABLE_H__ -#define __UNICORE_PGTABLE_H__ - -#include <asm-generic/pgtable-nopmd.h> -#include <asm/cpu-single.h> - -#include <asm/memory.h> -#include <asm/pgtable-hwdef.h> - -/* - * Just any arbitrary offset to the start of the vmalloc VM area: the - * current 8MB value just means that there will be a 8MB "hole" after the - * physical memory until the kernel virtual memory starts. That means that - * any out-of-bounds memory accesses will hopefully be caught. - * The vmalloc() routines leaves a hole of 4kB between each vmalloced - * area for the same reason. ;) - * - * Note that platforms may override VMALLOC_START, but they must provide - * VMALLOC_END. VMALLOC_END defines the (exclusive) limit of this space, - * which may not overlap IO space. - */ -#ifndef VMALLOC_START -#define VMALLOC_OFFSET SZ_8M -#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) \ - & ~(VMALLOC_OFFSET-1)) -#define VMALLOC_END (0xff000000UL) -#endif - -#define PTRS_PER_PTE 1024 -#define PTRS_PER_PGD 1024 - -/* - * PGDIR_SHIFT determines what a third-level page table entry can map - */ -#define PGDIR_SHIFT 22 - -#ifndef __ASSEMBLY__ -extern void __pte_error(const char *file, int line, unsigned long val); -extern void __pgd_error(const char *file, int line, unsigned long val); - -#define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte_val(pte)) -#define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd)) -#endif /* !__ASSEMBLY__ */ - -#define PGDIR_SIZE (1UL << PGDIR_SHIFT) -#define PGDIR_MASK (~(PGDIR_SIZE-1)) - -/* - * This is the lowest virtual address we can permit any user space - * mapping to be mapped at. This is particularly important for - * non-high vector CPUs. - */ -#define FIRST_USER_ADDRESS PAGE_SIZE - -#define FIRST_USER_PGD_NR 1 -#define USER_PTRS_PER_PGD ((TASK_SIZE/PGDIR_SIZE) - FIRST_USER_PGD_NR) - -/* - * section address mask and size definitions. - */ -#define SECTION_SHIFT 22 -#define SECTION_SIZE (1UL << SECTION_SHIFT) -#define SECTION_MASK (~(SECTION_SIZE-1)) - -#ifndef __ASSEMBLY__ - -/* - * The pgprot_* and protection_map entries will be fixed up in runtime - * to include the cachable bits based on memory policy, as well as any - * architecture dependent bits. - */ -#define _PTE_DEFAULT (PTE_PRESENT | PTE_YOUNG | PTE_CACHEABLE) - -extern pgprot_t pgprot_user; -extern pgprot_t pgprot_kernel; - -#define PAGE_NONE pgprot_user -#define PAGE_SHARED __pgprot(pgprot_val(pgprot_user | PTE_READ \ - | PTE_WRITE)) -#define PAGE_SHARED_EXEC __pgprot(pgprot_val(pgprot_user | PTE_READ \ - | PTE_WRITE \ - | PTE_EXEC)) -#define PAGE_COPY __pgprot(pgprot_val(pgprot_user | PTE_READ) -#define PAGE_COPY_EXEC __pgprot(pgprot_val(pgprot_user | PTE_READ \ - | PTE_EXEC)) -#define PAGE_READONLY __pgprot(pgprot_val(pgprot_user | PTE_READ)) -#define PAGE_READONLY_EXEC __pgprot(pgprot_val(pgprot_user | PTE_READ \ - | PTE_EXEC)) -#define PAGE_KERNEL pgprot_kernel -#define PAGE_KERNEL_EXEC __pgprot(pgprot_val(pgprot_kernel | PTE_EXEC)) - -#define __PAGE_NONE __pgprot(_PTE_DEFAULT) -#define __PAGE_SHARED __pgprot(_PTE_DEFAULT | PTE_READ \ - | PTE_WRITE) -#define __PAGE_SHARED_EXEC __pgprot(_PTE_DEFAULT | PTE_READ \ - | PTE_WRITE \ - | PTE_EXEC) -#define __PAGE_COPY __pgprot(_PTE_DEFAULT | PTE_READ) -#define __PAGE_COPY_EXEC __pgprot(_PTE_DEFAULT | PTE_READ \ - | PTE_EXEC) -#define __PAGE_READONLY __pgprot(_PTE_DEFAULT | PTE_READ) -#define __PAGE_READONLY_EXEC __pgprot(_PTE_DEFAULT | PTE_READ \ - | PTE_EXEC) - -#endif /* __ASSEMBLY__ */ - -/* - * The table below defines the page protection levels that we insert into our - * Linux page table version. These get translated into the best that the - * architecture can perform. Note that on UniCore hardware: - * 1) We cannot do execute protection - * 2) If we could do execute protection, then read is implied - * 3) write implies read permissions - */ -#define __P000 __PAGE_NONE -#define __P001 __PAGE_READONLY -#define __P010 __PAGE_COPY -#define __P011 __PAGE_COPY -#define __P100 __PAGE_READONLY_EXEC -#define __P101 __PAGE_READONLY_EXEC -#define __P110 __PAGE_COPY_EXEC -#define __P111 __PAGE_COPY_EXEC - -#define __S000 __PAGE_NONE -#define __S001 __PAGE_READONLY -#define __S010 __PAGE_SHARED -#define __S011 __PAGE_SHARED -#define __S100 __PAGE_READONLY_EXEC -#define __S101 __PAGE_READONLY_EXEC -#define __S110 __PAGE_SHARED_EXEC -#define __S111 __PAGE_SHARED_EXEC - -#ifndef __ASSEMBLY__ -/* - * ZERO_PAGE is a global shared page that is always zero: used - * for zero-mapped memory areas etc.. - */ -extern struct page *empty_zero_page; -#define ZERO_PAGE(vaddr) (empty_zero_page) - -#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) -#define pfn_pte(pfn, prot) (__pte(((pfn) << PAGE_SHIFT) \ - | pgprot_val(prot))) - -#define pte_none(pte) (!pte_val(pte)) -#define pte_clear(mm, addr, ptep) set_pte(ptep, __pte(0)) -#define pte_page(pte) (pfn_to_page(pte_pfn(pte))) - -#define set_pte(ptep, pte) cpu_set_pte(ptep, pte) - -#define set_pte_at(mm, addr, ptep, pteval) \ - do { \ - set_pte(ptep, pteval); \ - } while (0) - -/* - * The following only work if pte_present() is true. - * Undefined behaviour if not.. - */ -#define pte_present(pte) (pte_val(pte) & PTE_PRESENT) -#define pte_write(pte) (pte_val(pte) & PTE_WRITE) -#define pte_dirty(pte) (pte_val(pte) & PTE_DIRTY) -#define pte_young(pte) (pte_val(pte) & PTE_YOUNG) -#define pte_exec(pte) (pte_val(pte) & PTE_EXEC) - -#define PTE_BIT_FUNC(fn, op) \ -static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; } - -PTE_BIT_FUNC(wrprotect, &= ~PTE_WRITE); -PTE_BIT_FUNC(mkwrite, |= PTE_WRITE); -PTE_BIT_FUNC(mkclean, &= ~PTE_DIRTY); -PTE_BIT_FUNC(mkdirty, |= PTE_DIRTY); -PTE_BIT_FUNC(mkold, &= ~PTE_YOUNG); -PTE_BIT_FUNC(mkyoung, |= PTE_YOUNG); - -/* - * Mark the prot value as uncacheable. - */ -#define pgprot_noncached(prot) \ - __pgprot(pgprot_val(prot) & ~PTE_CACHEABLE) -#define pgprot_writecombine(prot) \ - __pgprot(pgprot_val(prot) & ~PTE_CACHEABLE) - -#define pmd_none(pmd) (!pmd_val(pmd)) -#define pmd_present(pmd) (pmd_val(pmd) & PMD_PRESENT) -#define pmd_bad(pmd) (((pmd_val(pmd) & \ - (PMD_PRESENT | PMD_TYPE_MASK)) \ - != (PMD_PRESENT | PMD_TYPE_TABLE))) - -#define set_pmd(pmdpd, pmdval) \ - do { \ - *(pmdpd) = pmdval; \ - } while (0) - -#define pmd_clear(pmdp) \ - do { \ - set_pmd(pmdp, __pmd(0));\ - clean_pmd_entry(pmdp); \ - } while (0) - -#define pmd_page_vaddr(pmd) ((pte_t *)__va(pmd_val(pmd) & PAGE_MASK)) -#define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd))) - -/* - * 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, prot) pfn_pte(page_to_pfn(page), prot) - -static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) -{ - const unsigned long mask = PTE_EXEC | PTE_WRITE | PTE_READ; - pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask); - return pte; -} - -extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; - -/* - * Encode and decode a swap entry. Swap entries are stored in the Linux - * page tables as follows: - * - * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 - * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 - * <--------------- offset --------------> <--- type --> 0 0 0 0 0 - * - * This gives us up to 127 swap files and 32GB per swap file. Note that - * the offset field is always non-zero. - */ -#define __SWP_TYPE_SHIFT 5 -#define __SWP_TYPE_BITS 7 -#define __SWP_TYPE_MASK ((1 << __SWP_TYPE_BITS) - 1) -#define __SWP_OFFSET_SHIFT (__SWP_TYPE_BITS + __SWP_TYPE_SHIFT) - -#define __swp_type(x) (((x).val >> __SWP_TYPE_SHIFT) \ - & __SWP_TYPE_MASK) -#define __swp_offset(x) ((x).val >> __SWP_OFFSET_SHIFT) -#define __swp_entry(type, offset) ((swp_entry_t) { \ - ((type) << __SWP_TYPE_SHIFT) | \ - ((offset) << __SWP_OFFSET_SHIFT) }) - -#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) -#define __swp_entry_to_pte(swp) ((pte_t) { (swp).val }) - -/* - * It is an error for the kernel to have more swap files than we can - * encode in the PTEs. This ensures that we know when MAX_SWAPFILES - * is increased beyond what we presently support. - */ -#define MAX_SWAPFILES_CHECK() \ - BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > __SWP_TYPE_BITS) - -/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ -/* FIXME: this is not correct */ -#define kern_addr_valid(addr) (1) - -#endif /* !__ASSEMBLY__ */ - -#endif /* __UNICORE_PGTABLE_H__ */ |