3603ab2b62
__ioremap() took a set of page table flags (specifically the cacheable and bufferable bits) to control the mapping type. However, with the advent of ARMv6, this is far too limited. Replace the page table flags with a memory type index, so that the desired attributes can be selected from the mem_type table. Finally, to prevent silent miscompilation due to the differing arguments, rename the __ioremap() and __ioremap_pfn() functions. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
/*
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* linux/arch/arm/mm/nommu.c
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*
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* ARM uCLinux supporting functions.
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*/
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/pagemap.h>
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#include <linux/bootmem.h>
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#include <asm/cacheflush.h>
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#include <asm/io.h>
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#include <asm/page.h>
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#include <asm/mach/arch.h>
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#include "mm.h"
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extern void _stext, __data_start, _end;
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/*
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* Reserve the various regions of node 0
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*/
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void __init reserve_node_zero(pg_data_t *pgdat)
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{
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/*
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* Register the kernel text and data with bootmem.
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* Note that this can only be in node 0.
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*/
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#ifdef CONFIG_XIP_KERNEL
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reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start);
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#else
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reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext);
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#endif
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/*
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* Register the exception vector page.
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* some architectures which the DRAM is the exception vector to trap,
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* alloc_page breaks with error, although it is not NULL, but "0."
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*/
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reserve_bootmem_node(pgdat, CONFIG_VECTORS_BASE, PAGE_SIZE);
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}
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/*
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* paging_init() sets up the page tables, initialises the zone memory
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* maps, and sets up the zero page, bad page and bad page tables.
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*/
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void __init paging_init(struct meminfo *mi, struct machine_desc *mdesc)
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{
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bootmem_init(mi);
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}
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/*
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* We don't need to do anything here for nommu machines.
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*/
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void setup_mm_for_reboot(char mode)
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{
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}
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void flush_dcache_page(struct page *page)
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{
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__cpuc_flush_dcache_page(page_address(page));
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}
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EXPORT_SYMBOL(flush_dcache_page);
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void __iomem *__arm_ioremap_pfn(unsigned long pfn, unsigned long offset,
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size_t size, unsigned int mtype)
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{
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if (pfn >= (0x100000000ULL >> PAGE_SHIFT))
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return NULL;
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return (void __iomem *) (offset + (pfn << PAGE_SHIFT));
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}
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EXPORT_SYMBOL(__arm_ioremap_pfn);
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void __iomem *__arm_ioremap(unsigned long phys_addr, size_t size,
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unsigned int mtype)
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{
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return (void __iomem *)phys_addr;
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}
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EXPORT_SYMBOL(__arm_ioremap);
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void __iounmap(volatile void __iomem *addr)
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{
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}
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EXPORT_SYMBOL(__iounmap);
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