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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0371d3f7e8
Ensure that the meminfo array is sanity checked before we pass the memory to memblock. This helps to ensure that memblock and meminfo agree on the dimensions of memory, especially when more memory is passed than the kernel can deal with. Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
97 lines
2.2 KiB
C
97 lines
2.2 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/io.h>
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#include <linux/memblock.h>
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#include <asm/cacheflush.h>
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#include <asm/sections.h>
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#include <asm/page.h>
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#include <asm/setup.h>
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#include <asm/mach/arch.h>
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#include "mm.h"
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void __init arm_mm_memblock_reserve(void)
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{
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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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memblock_reserve(CONFIG_VECTORS_BASE, PAGE_SIZE);
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}
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void __init sanity_check_meminfo(void)
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{
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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 machine_desc *mdesc)
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{
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bootmem_init();
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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_area(page_address(page), PAGE_SIZE);
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}
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EXPORT_SYMBOL(flush_dcache_page);
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void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long uaddr, void *dst, const void *src,
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unsigned long len)
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{
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memcpy(dst, src, len);
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if (vma->vm_flags & VM_EXEC)
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__cpuc_coherent_user_range(uaddr, uaddr + len);
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}
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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_pfn_caller(unsigned long pfn, unsigned long offset,
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size_t size, unsigned int mtype, void *caller)
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{
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return __arm_ioremap_pfn(pfn, offset, size, mtype);
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}
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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 __iomem *__arm_ioremap_caller(unsigned long phys_addr, size_t size,
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unsigned int mtype, void *caller)
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{
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return __arm_ioremap(phys_addr, size, mtype);
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}
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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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