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139 lines
3.7 KiB
139 lines
3.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* page.h: Various defines and such for MMU operations on the Sparc for |
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* the Linux kernel. |
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* |
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* Copyright (C) 1995 David S. Miller ([email protected]) |
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*/ |
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#ifndef _SPARC_PAGE_H |
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#define _SPARC_PAGE_H |
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#include <linux/const.h> |
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#define PAGE_SHIFT 12 |
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#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) |
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#define PAGE_MASK (~(PAGE_SIZE-1)) |
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#ifndef __ASSEMBLY__ |
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#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) |
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#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) |
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#define clear_user_page(addr, vaddr, page) \ |
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do { clear_page(addr); \ |
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sparc_flush_page_to_ram(page); \ |
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} while (0) |
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#define copy_user_page(to, from, vaddr, page) \ |
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do { copy_page(to, from); \ |
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sparc_flush_page_to_ram(page); \ |
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} while (0) |
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/* The following structure is used to hold the physical |
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* memory configuration of the machine. This is filled in |
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* prom_meminit() and is later used by mem_init() to set up |
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* mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of |
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* these structs, this is arbitrary. The entry after the |
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* last valid one has num_bytes==0. |
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*/ |
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struct sparc_phys_banks { |
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unsigned long base_addr; |
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unsigned long num_bytes; |
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}; |
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#define SPARC_PHYS_BANKS 32 |
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extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1]; |
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/* passing structs on the Sparc slow us down tremendously... */ |
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/* #define STRICT_MM_TYPECHECKS */ |
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#ifdef STRICT_MM_TYPECHECKS |
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/* |
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* These are used to make use of C type-checking.. |
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*/ |
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typedef struct { unsigned long pte; } pte_t; |
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typedef struct { unsigned long iopte; } iopte_t; |
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typedef struct { unsigned long pmd; } pmd_t; |
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typedef struct { unsigned long pgd; } pgd_t; |
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typedef struct { unsigned long ctxd; } ctxd_t; |
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typedef struct { unsigned long pgprot; } pgprot_t; |
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typedef struct { unsigned long iopgprot; } iopgprot_t; |
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#define pte_val(x) ((x).pte) |
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#define iopte_val(x) ((x).iopte) |
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#define pmd_val(x) ((x).pmd) |
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#define pgd_val(x) ((x).pgd) |
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#define ctxd_val(x) ((x).ctxd) |
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#define pgprot_val(x) ((x).pgprot) |
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#define iopgprot_val(x) ((x).iopgprot) |
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#define __pte(x) ((pte_t) { (x) } ) |
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#define __pmd(x) ((pmd_t) { { (x) }, }) |
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#define __iopte(x) ((iopte_t) { (x) } ) |
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#define __pgd(x) ((pgd_t) { (x) } ) |
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#define __ctxd(x) ((ctxd_t) { (x) } ) |
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#define __pgprot(x) ((pgprot_t) { (x) } ) |
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#define __iopgprot(x) ((iopgprot_t) { (x) } ) |
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#else |
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/* |
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* .. while these make it easier on the compiler |
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*/ |
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typedef unsigned long pte_t; |
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typedef unsigned long iopte_t; |
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typedef unsigned long pmd_t; |
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typedef unsigned long pgd_t; |
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typedef unsigned long ctxd_t; |
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typedef unsigned long pgprot_t; |
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typedef unsigned long iopgprot_t; |
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#define pte_val(x) (x) |
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#define iopte_val(x) (x) |
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#define pmd_val(x) (x) |
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#define pgd_val(x) (x) |
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#define ctxd_val(x) (x) |
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#define pgprot_val(x) (x) |
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#define iopgprot_val(x) (x) |
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#define __pte(x) (x) |
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#define __pmd(x) (x) |
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#define __iopte(x) (x) |
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#define __pgd(x) (x) |
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#define __ctxd(x) (x) |
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#define __pgprot(x) (x) |
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#define __iopgprot(x) (x) |
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#endif |
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typedef pte_t *pgtable_t; |
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#define TASK_UNMAPPED_BASE 0x50000000 |
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#else /* !(__ASSEMBLY__) */ |
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#define __pgprot(x) (x) |
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#endif /* !(__ASSEMBLY__) */ |
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#define PAGE_OFFSET 0xf0000000 |
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#ifndef __ASSEMBLY__ |
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extern unsigned long phys_base; |
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extern unsigned long pfn_base; |
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#endif |
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#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base) |
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#define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET)) |
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#define virt_to_phys __pa |
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#define phys_to_virt __va |
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#define ARCH_PFN_OFFSET (pfn_base) |
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
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#define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr)) |
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#define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr) |
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#include <asm-generic/memory_model.h> |
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#include <asm-generic/getorder.h> |
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#endif /* _SPARC_PAGE_H */
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