/*
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/*
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* linux/arch/or32/mm/memory.c
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* linux/arch/or32/mm/memory.c
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*
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*
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* Based on: linux/arch/m68knommu/mm/memory.c
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* Based on: linux/arch/m68knommu/mm/memory.c
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*/
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*/
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#include <linux/config.h>
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#include <linux/config.h>
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#include <linux/mm.h>
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#include <linux/mm.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/types.h>
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#include <linux/malloc.h>
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#include <linux/malloc.h>
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#include <asm/segment.h>
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#include <asm/segment.h>
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#include <asm/page.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/pgtable.h>
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#include <asm/system.h>
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#include <asm/system.h>
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#include <asm/traps.h>
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#include <asm/traps.h>
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/*
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/*
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* The following two routines map from a physical address to a kernel
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* The following two routines map from a physical address to a kernel
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* virtual address and vice versa.
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* virtual address and vice versa.
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*/
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*/
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unsigned long mm_vtop (unsigned long vaddr)
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unsigned long mm_vtop (unsigned long vaddr)
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{
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{
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return vaddr;
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return vaddr;
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}
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}
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unsigned long mm_ptov (unsigned long paddr)
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unsigned long mm_ptov (unsigned long paddr)
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{
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{
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return paddr;
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return paddr;
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}
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}
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/*
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/*
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* cache_clear() semantics: Clear any cache entries for the area in question,
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* cache_clear() semantics: Clear any cache entries for the area in question,
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* without writing back dirty entries first. This is useful if the data will
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* without writing back dirty entries first. This is useful if the data will
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* be overwritten anyway, e.g. by DMA to memory. The range is defined by a
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* be overwritten anyway, e.g. by DMA to memory. The range is defined by a
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* _physical_ address.
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* _physical_ address.
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*/
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*/
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void cache_clear (unsigned long paddr, int len)
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void cache_clear (unsigned long paddr, int len)
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{
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{
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}
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}
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/*
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/*
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* cache_push() semantics: Write back any dirty cache data in the given area,
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* cache_push() semantics: Write back any dirty cache data in the given area,
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* and invalidate the range in the instruction cache. It needs not (but may)
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* and invalidate the range in the instruction cache. It needs not (but may)
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* invalidate those entries also in the data cache. The range is defined by a
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* invalidate those entries also in the data cache. The range is defined by a
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* _physical_ address.
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* _physical_ address.
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*/
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*/
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void cache_push (unsigned long paddr, int len)
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void cache_push (unsigned long paddr, int len)
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{
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{
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}
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}
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/*
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/*
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* cache_push_v() semantics: Write back any dirty cache data in the given
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* cache_push_v() semantics: Write back any dirty cache data in the given
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* area, and invalidate those entries at least in the instruction cache. This
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* area, and invalidate those entries at least in the instruction cache. This
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* is intended to be used after data has been written that can be executed as
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* is intended to be used after data has been written that can be executed as
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* code later. The range is defined by a _user_mode_ _virtual_ address (or,
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* code later. The range is defined by a _user_mode_ _virtual_ address (or,
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* more exactly, the space is defined by the %sfc/%dfc register.)
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* more exactly, the space is defined by the %sfc/%dfc register.)
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*/
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*/
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void cache_push_v (unsigned long vaddr, int len)
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void cache_push_v (unsigned long vaddr, int len)
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{
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{
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}
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}
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unsigned long mm_phys_to_virt (unsigned long addr)
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unsigned long mm_phys_to_virt (unsigned long addr)
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{
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{
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return PTOV (addr);
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return PTOV (addr);
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}
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}
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/* Map some physical address range into the kernel address space. The
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/* Map some physical address range into the kernel address space. The
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* code is copied and adapted from map_chunk().
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* code is copied and adapted from map_chunk().
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*/
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*/
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unsigned long kernel_map(unsigned long paddr, unsigned long size,
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unsigned long kernel_map(unsigned long paddr, unsigned long size,
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int nocacheflag, unsigned long *memavailp )
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int nocacheflag, unsigned long *memavailp )
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{
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{
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return paddr;
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return paddr;
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}
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}
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void kernel_set_cachemode( unsigned long address, unsigned long size,
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void kernel_set_cachemode( unsigned long address, unsigned long size,
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unsigned cmode )
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unsigned cmode )
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{
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{
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}
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}
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#ifdef MAGIC_ROM_PTR
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#ifdef MAGIC_ROM_PTR
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#ifdef CONFIG_ROMKERNEL
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#ifdef CONFIG_ROMKERNEL
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int is_in_rom(unsigned long addr) {
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int is_in_rom(unsigned long addr) {
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extern unsigned long __rom_start, _flashend;
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extern unsigned long __rom_start, _flashend;
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/* Anything not in operational RAM is returned as in rom! */
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/* Anything not in operational RAM is returned as in rom! */
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if ((addr >= (unsigned long)&__rom_start) && (addr < (unsigned long)&_flashend))
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if ((addr >= (unsigned long)&__rom_start) && (addr < (unsigned long)&_flashend))
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return(1);
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return(1);
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return(0);
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return(0);
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}
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}
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#else
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#else
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int is_in_rom(unsigned long addr) {
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int is_in_rom(unsigned long addr) {
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return 0;
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return 0;
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}
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}
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#endif
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#endif
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#endif
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#endif
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