unicore32 core architecture: mm related: generic codes
This patch includes generic codes for memory management. Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
GuanXuetao
parent
f73670e8a5
commit
b50f1704e9
13 changed files with 1390 additions and 0 deletions
27
arch/unicore32/include/asm/cache.h
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27
arch/unicore32/include/asm/cache.h
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/*
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* linux/arch/unicore32/include/asm/cache.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __UNICORE_CACHE_H__
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#define __UNICORE_CACHE_H__
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#define L1_CACHE_SHIFT (5)
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#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
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/*
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* Memory returned by kmalloc() may be used for DMA, so we must make
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* sure that all such allocations are cache aligned. Otherwise,
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* unrelated code may cause parts of the buffer to be read into the
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* cache before the transfer is done, causing old data to be seen by
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* the CPU.
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*/
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#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
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#endif
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46
arch/unicore32/include/asm/memblock.h
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46
arch/unicore32/include/asm/memblock.h
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@ -0,0 +1,46 @@
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/*
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* linux/arch/unicore32/include/asm/memblock.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __UNICORE_MEMBLOCK_H__
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#define __UNICORE_MEMBLOCK_H__
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/*
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* Memory map description
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*/
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# define NR_BANKS 8
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struct membank {
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unsigned long start;
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unsigned long size;
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unsigned int highmem;
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};
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struct meminfo {
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int nr_banks;
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struct membank bank[NR_BANKS];
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};
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extern struct meminfo meminfo;
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#define for_each_bank(iter, mi) \
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for (iter = 0; iter < (mi)->nr_banks; iter++)
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#define bank_pfn_start(bank) __phys_to_pfn((bank)->start)
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#define bank_pfn_end(bank) __phys_to_pfn((bank)->start + (bank)->size)
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#define bank_pfn_size(bank) ((bank)->size >> PAGE_SHIFT)
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#define bank_phys_start(bank) ((bank)->start)
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#define bank_phys_end(bank) ((bank)->start + (bank)->size)
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#define bank_phys_size(bank) ((bank)->size)
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extern void uc32_memblock_init(struct meminfo *);
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#endif
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123
arch/unicore32/include/asm/memory.h
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123
arch/unicore32/include/asm/memory.h
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@ -0,0 +1,123 @@
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/*
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* linux/arch/unicore32/include/asm/memory.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Note: this file should not be included by non-asm/.h files
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*/
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#ifndef __UNICORE_MEMORY_H__
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#define __UNICORE_MEMORY_H__
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#include <linux/compiler.h>
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#include <linux/const.h>
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#include <asm/sizes.h>
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#include <mach/memory.h>
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/*
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* Allow for constants defined here to be used from assembly code
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* by prepending the UL suffix only with actual C code compilation.
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*/
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#define UL(x) _AC(x, UL)
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/*
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* PAGE_OFFSET - the virtual address of the start of the kernel image
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* TASK_SIZE - the maximum size of a user space task.
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* TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area
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*/
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#define PAGE_OFFSET UL(0xC0000000)
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#define TASK_SIZE (PAGE_OFFSET - UL(0x41000000))
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#define TASK_UNMAPPED_BASE (PAGE_OFFSET / 3)
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/*
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* The module space lives between the addresses given by TASK_SIZE
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* and PAGE_OFFSET - it must be within 32MB of the kernel text.
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*/
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#define MODULES_VADDR (PAGE_OFFSET - 16*1024*1024)
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#if TASK_SIZE > MODULES_VADDR
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#error Top of user space clashes with start of module space
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#endif
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#define MODULES_END (PAGE_OFFSET)
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/*
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* Allow 16MB-aligned ioremap pages
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*/
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#define IOREMAP_MAX_ORDER 24
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/*
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* Physical vs virtual RAM address space conversion. These are
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* private definitions which should NOT be used outside memory.h
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* files. Use virt_to_phys/phys_to_virt/__pa/__va instead.
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*/
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#ifndef __virt_to_phys
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#define __virt_to_phys(x) ((x) - PAGE_OFFSET + PHYS_OFFSET)
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#define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET)
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#endif
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/*
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* Convert a physical address to a Page Frame Number and back
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*/
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#define __phys_to_pfn(paddr) ((paddr) >> PAGE_SHIFT)
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#define __pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
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/*
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* Convert a page to/from a physical address
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*/
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#define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page)))
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#define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys)))
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#ifndef __ASSEMBLY__
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#ifndef arch_adjust_zones
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#define arch_adjust_zones(size, holes) do { } while (0)
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#endif
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/*
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* PFNs are used to describe any physical page; this means
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* PFN 0 == physical address 0.
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*
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* This is the PFN of the first RAM page in the kernel
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* direct-mapped view. We assume this is the first page
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* of RAM in the mem_map as well.
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*/
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#define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT)
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/*
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* Drivers should NOT use these either.
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*/
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#define __pa(x) __virt_to_phys((unsigned long)(x))
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#define __va(x) ((void *)__phys_to_virt((unsigned long)(x)))
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#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
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/*
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* Conversion between a struct page and a physical address.
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*
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* Note: when converting an unknown physical address to a
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* struct page, the resulting pointer must be validated
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* using VALID_PAGE(). It must return an invalid struct page
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* for any physical address not corresponding to a system
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* RAM address.
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*
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* page_to_pfn(page) convert a struct page * to a PFN number
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* pfn_to_page(pfn) convert a _valid_ PFN number to struct page *
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*
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* virt_to_page(k) convert a _valid_ virtual address to struct page *
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* virt_addr_valid(k) indicates whether a virtual address is valid
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*/
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#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
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#define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && \
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(unsigned long)(kaddr) < (unsigned long)high_memory)
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#endif
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#include <asm-generic/memory_model.h>
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#endif
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80
arch/unicore32/include/asm/page.h
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80
arch/unicore32/include/asm/page.h
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@ -0,0 +1,80 @@
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/*
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* linux/arch/unicore32/include/asm/page.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __UNICORE_PAGE_H__
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#define __UNICORE_PAGE_H__
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/* PAGE_SHIFT determines the page size */
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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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struct page;
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struct vm_area_struct;
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#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
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extern void copy_page(void *to, const void *from);
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#define clear_user_page(page, vaddr, pg) clear_page(page)
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#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
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#undef 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 pgd; } pgd_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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#define pte_val(x) ((x).pte)
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#define pgd_val(x) ((x).pgd)
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#define pgprot_val(x) ((x).pgprot)
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#define __pte(x) ((pte_t) { (x) })
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#define __pgd(x) ((pgd_t) { (x) })
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#define __pgprot(x) ((pgprot_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 pgd_t;
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typedef unsigned long pgprot_t;
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#define pte_val(x) (x)
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#define pgd_val(x) (x)
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#define pgprot_val(x) (x)
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#define __pte(x) (x)
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#define __pgd(x) (x)
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#define __pgprot(x) (x)
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#endif /* STRICT_MM_TYPECHECKS */
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typedef struct page *pgtable_t;
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extern int pfn_valid(unsigned long);
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#include <asm/memory.h>
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#endif /* !__ASSEMBLY__ */
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#define VM_DATA_DEFAULT_FLAGS \
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(VM_READ | VM_WRITE | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#include <asm-generic/getorder.h>
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#endif
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98
arch/unicore32/include/asm/tlb.h
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98
arch/unicore32/include/asm/tlb.h
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/*
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* linux/arch/unicore32/include/asm/tlb.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __UNICORE_TLB_H__
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#define __UNICORE_TLB_H__
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#include <asm/cacheflush.h>
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#include <asm/tlbflush.h>
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#include <asm/pgalloc.h>
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/*
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* TLB handling. This allows us to remove pages from the page
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* tables, and efficiently handle the TLB issues.
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*/
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struct mmu_gather {
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struct mm_struct *mm;
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unsigned int fullmm;
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unsigned long range_start;
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unsigned long range_end;
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};
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DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);
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static inline struct mmu_gather *
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tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
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{
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struct mmu_gather *tlb = &get_cpu_var(mmu_gathers);
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tlb->mm = mm;
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tlb->fullmm = full_mm_flush;
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return tlb;
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}
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static inline void
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tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
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{
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if (tlb->fullmm)
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flush_tlb_mm(tlb->mm);
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/* keep the page table cache within bounds */
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check_pgt_cache();
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put_cpu_var(mmu_gathers);
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}
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/*
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* Memorize the range for the TLB flush.
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*/
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static inline void
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tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, unsigned long addr)
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{
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if (!tlb->fullmm) {
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if (addr < tlb->range_start)
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tlb->range_start = addr;
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if (addr + PAGE_SIZE > tlb->range_end)
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tlb->range_end = addr + PAGE_SIZE;
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}
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}
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/*
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* In the case of tlb vma handling, we can optimise these away in the
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* case where we're doing a full MM flush. When we're doing a munmap,
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* the vmas are adjusted to only cover the region to be torn down.
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*/
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static inline void
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tlb_start_vma(struct mmu_gather *tlb, struct vm_area_struct *vma)
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{
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if (!tlb->fullmm) {
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flush_cache_range(vma, vma->vm_start, vma->vm_end);
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tlb->range_start = TASK_SIZE;
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tlb->range_end = 0;
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}
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}
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static inline void
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tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma)
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{
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if (!tlb->fullmm && tlb->range_end > 0)
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flush_tlb_range(vma, tlb->range_start, tlb->range_end);
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}
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#define tlb_remove_page(tlb, page) free_page_and_swap_cache(page)
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#define pte_free_tlb(tlb, ptep, addr) pte_free((tlb)->mm, ptep)
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#define pmd_free_tlb(tlb, pmdp, addr) pmd_free((tlb)->mm, pmdp)
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#define pud_free_tlb(tlb, x, addr) do { } while (0)
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#define tlb_migrate_finish(mm) do { } while (0)
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#endif
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20
arch/unicore32/include/mach/map.h
Normal file
20
arch/unicore32/include/mach/map.h
Normal file
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/*
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* linux/arch/unicore32/include/mach/map.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Page table mapping constructs and function prototypes
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*/
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#define MT_DEVICE 0
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#define MT_DEVICE_CACHED 2
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#define MT_KUSER 7
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#define MT_HIGH_VECTORS 8
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#define MT_MEMORY 9
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#define MT_ROM 10
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58
arch/unicore32/include/mach/memory.h
Normal file
58
arch/unicore32/include/mach/memory.h
Normal file
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/*
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* linux/arch/unicore32/include/mach/memory.h
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*
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||||
* Code specific to PKUnity SoC and UniCore ISA
|
||||
*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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||||
* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __MACH_PUV3_MEMORY_H__
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#define __MACH_PUV3_MEMORY_H__
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#include <mach/hardware.h>
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/* Physical DRAM offset. */
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#define PHYS_OFFSET UL(0x00000000)
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/* The base address of exception vectors. */
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#define VECTORS_BASE UL(0xffff0000)
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/* The base address of kuser area. */
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#define KUSER_BASE UL(0x80000000)
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#ifdef __ASSEMBLY__
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/* The byte offset of the kernel image in RAM from the start of RAM. */
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#define KERNEL_IMAGE_START 0x00408000
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#endif
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#if !defined(__ASSEMBLY__) && defined(CONFIG_PCI)
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void puv3_pci_adjust_zones(unsigned long *size, unsigned long *holes);
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#define arch_adjust_zones(size, holes) \
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puv3_pci_adjust_zones(size, holes)
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#endif
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/*
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* PCI controller in PKUnity-3 masks highest 5-bit for upstream channel,
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* so we must limit the DMA allocation within 128M physical memory for
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* supporting PCI devices.
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*/
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#define PCI_DMA_THRESHOLD (PHYS_OFFSET + SZ_128M - 1)
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#define is_pcibus_device(dev) (dev && \
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(strncmp(dev->bus->name, "pci", 3) == 0))
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#define __virt_to_pcibus(x) (__virt_to_phys(x) + PKUNITY_PCIAHB_BASE)
|
||||
#define __pcibus_to_virt(x) __phys_to_virt((x) - PKUNITY_PCIAHB_BASE)
|
||||
|
||||
/* kuser area */
|
||||
#define KUSER_VECPAGE_BASE (KUSER_BASE + UL(0x3fff0000))
|
||||
#define KUSER_UNIGFX_BASE (KUSER_BASE + PKUNITY_UNIGFX_MMAP_BASE)
|
||||
/* kuser_vecpage (0xbfff0000) is ro, and vectors page (0xffff0000) is rw */
|
||||
#define kuser_vecpage_to_vectors(x) ((x) - (KUSER_VECPAGE_BASE) \
|
||||
+ (VECTORS_BASE))
|
||||
|
||||
#endif
|
||||
50
arch/unicore32/mm/Kconfig
Normal file
50
arch/unicore32/mm/Kconfig
Normal file
|
|
@ -0,0 +1,50 @@
|
|||
comment "Processor Type"
|
||||
|
||||
# Select CPU types depending on the architecture selected. This selects
|
||||
# which CPUs we support in the kernel image, and the compiler instruction
|
||||
# optimiser behaviour.
|
||||
|
||||
config CPU_UCV2
|
||||
def_bool y
|
||||
|
||||
comment "Processor Features"
|
||||
|
||||
config CPU_ICACHE_DISABLE
|
||||
bool "Disable I-Cache (I-bit)"
|
||||
help
|
||||
Say Y here to disable the processor instruction cache. Unless
|
||||
you have a reason not to or are unsure, say N.
|
||||
|
||||
config CPU_DCACHE_DISABLE
|
||||
bool "Disable D-Cache (D-bit)"
|
||||
help
|
||||
Say Y here to disable the processor data cache. Unless
|
||||
you have a reason not to or are unsure, say N.
|
||||
|
||||
config CPU_DCACHE_WRITETHROUGH
|
||||
bool "Force write through D-cache"
|
||||
help
|
||||
Say Y here to use the data cache in writethrough mode. Unless you
|
||||
specifically require this or are unsure, say N.
|
||||
|
||||
config CPU_DCACHE_LINE_DISABLE
|
||||
bool "Disable D-cache line ops"
|
||||
default y
|
||||
help
|
||||
Say Y here to disable the data cache line operations.
|
||||
|
||||
config CPU_TLB_SINGLE_ENTRY_DISABLE
|
||||
bool "Disable TLB single entry ops"
|
||||
default y
|
||||
help
|
||||
Say Y here to disable the TLB single entry operations.
|
||||
|
||||
config SWIOTLB
|
||||
def_bool y
|
||||
|
||||
config IOMMU_HELPER
|
||||
def_bool SWIOTLB
|
||||
|
||||
config NEED_SG_DMA_LENGTH
|
||||
def_bool SWIOTLB
|
||||
|
||||
15
arch/unicore32/mm/Makefile
Normal file
15
arch/unicore32/mm/Makefile
Normal file
|
|
@ -0,0 +1,15 @@
|
|||
#
|
||||
# Makefile for the linux unicore-specific parts of the memory manager.
|
||||
#
|
||||
|
||||
obj-y := extable.o fault.o init.o pgd.o mmu.o
|
||||
obj-y += iomap.o flush.o ioremap.o
|
||||
|
||||
obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o
|
||||
|
||||
obj-$(CONFIG_MODULES) += proc-syms.o
|
||||
|
||||
obj-$(CONFIG_ALIGNMENT_TRAP) += alignment.o
|
||||
|
||||
obj-$(CONFIG_CPU_UCV2) += cache-ucv2.o tlb-ucv2.o proc-ucv2.o
|
||||
|
||||
517
arch/unicore32/mm/init.c
Normal file
517
arch/unicore32/mm/init.c
Normal file
|
|
@ -0,0 +1,517 @@
|
|||
/*
|
||||
* linux/arch/unicore32/mm/init.c
|
||||
*
|
||||
* Copyright (C) 2010 GUAN Xue-tao
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/swap.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/bootmem.h>
|
||||
#include <linux/mman.h>
|
||||
#include <linux/nodemask.h>
|
||||
#include <linux/initrd.h>
|
||||
#include <linux/highmem.h>
|
||||
#include <linux/gfp.h>
|
||||
#include <linux/memblock.h>
|
||||
#include <linux/sort.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
|
||||
#include <asm/sections.h>
|
||||
#include <asm/setup.h>
|
||||
#include <asm/sizes.h>
|
||||
#include <asm/tlb.h>
|
||||
#include <mach/map.h>
|
||||
|
||||
#include "mm.h"
|
||||
|
||||
static unsigned long phys_initrd_start __initdata = 0x01000000;
|
||||
static unsigned long phys_initrd_size __initdata = SZ_8M;
|
||||
|
||||
static int __init early_initrd(char *p)
|
||||
{
|
||||
unsigned long start, size;
|
||||
char *endp;
|
||||
|
||||
start = memparse(p, &endp);
|
||||
if (*endp == ',') {
|
||||
size = memparse(endp + 1, NULL);
|
||||
|
||||
phys_initrd_start = start;
|
||||
phys_initrd_size = size;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
early_param("initrd", early_initrd);
|
||||
|
||||
/*
|
||||
* This keeps memory configuration data used by a couple memory
|
||||
* initialization functions, as well as show_mem() for the skipping
|
||||
* of holes in the memory map. It is populated by uc32_add_memory().
|
||||
*/
|
||||
struct meminfo meminfo;
|
||||
|
||||
void show_mem(void)
|
||||
{
|
||||
int free = 0, total = 0, reserved = 0;
|
||||
int shared = 0, cached = 0, slab = 0, i;
|
||||
struct meminfo *mi = &meminfo;
|
||||
|
||||
printk(KERN_DEFAULT "Mem-info:\n");
|
||||
show_free_areas();
|
||||
|
||||
for_each_bank(i, mi) {
|
||||
struct membank *bank = &mi->bank[i];
|
||||
unsigned int pfn1, pfn2;
|
||||
struct page *page, *end;
|
||||
|
||||
pfn1 = bank_pfn_start(bank);
|
||||
pfn2 = bank_pfn_end(bank);
|
||||
|
||||
page = pfn_to_page(pfn1);
|
||||
end = pfn_to_page(pfn2 - 1) + 1;
|
||||
|
||||
do {
|
||||
total++;
|
||||
if (PageReserved(page))
|
||||
reserved++;
|
||||
else if (PageSwapCache(page))
|
||||
cached++;
|
||||
else if (PageSlab(page))
|
||||
slab++;
|
||||
else if (!page_count(page))
|
||||
free++;
|
||||
else
|
||||
shared += page_count(page) - 1;
|
||||
page++;
|
||||
} while (page < end);
|
||||
}
|
||||
|
||||
printk(KERN_DEFAULT "%d pages of RAM\n", total);
|
||||
printk(KERN_DEFAULT "%d free pages\n", free);
|
||||
printk(KERN_DEFAULT "%d reserved pages\n", reserved);
|
||||
printk(KERN_DEFAULT "%d slab pages\n", slab);
|
||||
printk(KERN_DEFAULT "%d pages shared\n", shared);
|
||||
printk(KERN_DEFAULT "%d pages swap cached\n", cached);
|
||||
}
|
||||
|
||||
static void __init find_limits(unsigned long *min, unsigned long *max_low,
|
||||
unsigned long *max_high)
|
||||
{
|
||||
struct meminfo *mi = &meminfo;
|
||||
int i;
|
||||
|
||||
*min = -1UL;
|
||||
*max_low = *max_high = 0;
|
||||
|
||||
for_each_bank(i, mi) {
|
||||
struct membank *bank = &mi->bank[i];
|
||||
unsigned long start, end;
|
||||
|
||||
start = bank_pfn_start(bank);
|
||||
end = bank_pfn_end(bank);
|
||||
|
||||
if (*min > start)
|
||||
*min = start;
|
||||
if (*max_high < end)
|
||||
*max_high = end;
|
||||
if (bank->highmem)
|
||||
continue;
|
||||
if (*max_low < end)
|
||||
*max_low = end;
|
||||
}
|
||||
}
|
||||
|
||||
static void __init uc32_bootmem_init(unsigned long start_pfn,
|
||||
unsigned long end_pfn)
|
||||
{
|
||||
struct memblock_region *reg;
|
||||
unsigned int boot_pages;
|
||||
phys_addr_t bitmap;
|
||||
pg_data_t *pgdat;
|
||||
|
||||
/*
|
||||
* Allocate the bootmem bitmap page. This must be in a region
|
||||
* of memory which has already been mapped.
|
||||
*/
|
||||
boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
|
||||
bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES,
|
||||
__pfn_to_phys(end_pfn));
|
||||
|
||||
/*
|
||||
* Initialise the bootmem allocator, handing the
|
||||
* memory banks over to bootmem.
|
||||
*/
|
||||
node_set_online(0);
|
||||
pgdat = NODE_DATA(0);
|
||||
init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn);
|
||||
|
||||
/* Free the lowmem regions from memblock into bootmem. */
|
||||
for_each_memblock(memory, reg) {
|
||||
unsigned long start = memblock_region_memory_base_pfn(reg);
|
||||
unsigned long end = memblock_region_memory_end_pfn(reg);
|
||||
|
||||
if (end >= end_pfn)
|
||||
end = end_pfn;
|
||||
if (start >= end)
|
||||
break;
|
||||
|
||||
free_bootmem(__pfn_to_phys(start), (end - start) << PAGE_SHIFT);
|
||||
}
|
||||
|
||||
/* Reserve the lowmem memblock reserved regions in bootmem. */
|
||||
for_each_memblock(reserved, reg) {
|
||||
unsigned long start = memblock_region_reserved_base_pfn(reg);
|
||||
unsigned long end = memblock_region_reserved_end_pfn(reg);
|
||||
|
||||
if (end >= end_pfn)
|
||||
end = end_pfn;
|
||||
if (start >= end)
|
||||
break;
|
||||
|
||||
reserve_bootmem(__pfn_to_phys(start),
|
||||
(end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT);
|
||||
}
|
||||
}
|
||||
|
||||
static void __init uc32_bootmem_free(unsigned long min, unsigned long max_low,
|
||||
unsigned long max_high)
|
||||
{
|
||||
unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
|
||||
struct memblock_region *reg;
|
||||
|
||||
/*
|
||||
* initialise the zones.
|
||||
*/
|
||||
memset(zone_size, 0, sizeof(zone_size));
|
||||
|
||||
/*
|
||||
* The memory size has already been determined. If we need
|
||||
* to do anything fancy with the allocation of this memory
|
||||
* to the zones, now is the time to do it.
|
||||
*/
|
||||
zone_size[0] = max_low - min;
|
||||
|
||||
/*
|
||||
* Calculate the size of the holes.
|
||||
* holes = node_size - sum(bank_sizes)
|
||||
*/
|
||||
memcpy(zhole_size, zone_size, sizeof(zhole_size));
|
||||
for_each_memblock(memory, reg) {
|
||||
unsigned long start = memblock_region_memory_base_pfn(reg);
|
||||
unsigned long end = memblock_region_memory_end_pfn(reg);
|
||||
|
||||
if (start < max_low) {
|
||||
unsigned long low_end = min(end, max_low);
|
||||
zhole_size[0] -= low_end - start;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Adjust the sizes according to any special requirements for
|
||||
* this machine type.
|
||||
*/
|
||||
arch_adjust_zones(zone_size, zhole_size);
|
||||
|
||||
free_area_init_node(0, zone_size, min, zhole_size);
|
||||
}
|
||||
|
||||
int pfn_valid(unsigned long pfn)
|
||||
{
|
||||
return memblock_is_memory(pfn << PAGE_SHIFT);
|
||||
}
|
||||
EXPORT_SYMBOL(pfn_valid);
|
||||
|
||||
static void uc32_memory_present(void)
|
||||
{
|
||||
}
|
||||
|
||||
static int __init meminfo_cmp(const void *_a, const void *_b)
|
||||
{
|
||||
const struct membank *a = _a, *b = _b;
|
||||
long cmp = bank_pfn_start(a) - bank_pfn_start(b);
|
||||
return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
|
||||
}
|
||||
|
||||
void __init uc32_memblock_init(struct meminfo *mi)
|
||||
{
|
||||
int i;
|
||||
|
||||
sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]),
|
||||
meminfo_cmp, NULL);
|
||||
|
||||
memblock_init();
|
||||
for (i = 0; i < mi->nr_banks; i++)
|
||||
memblock_add(mi->bank[i].start, mi->bank[i].size);
|
||||
|
||||
/* Register the kernel text, kernel data and initrd with memblock. */
|
||||
memblock_reserve(__pa(_text), _end - _text);
|
||||
|
||||
#ifdef CONFIG_BLK_DEV_INITRD
|
||||
if (phys_initrd_size) {
|
||||
memblock_reserve(phys_initrd_start, phys_initrd_size);
|
||||
|
||||
/* Now convert initrd to virtual addresses */
|
||||
initrd_start = __phys_to_virt(phys_initrd_start);
|
||||
initrd_end = initrd_start + phys_initrd_size;
|
||||
}
|
||||
#endif
|
||||
|
||||
uc32_mm_memblock_reserve();
|
||||
|
||||
memblock_analyze();
|
||||
memblock_dump_all();
|
||||
}
|
||||
|
||||
void __init bootmem_init(void)
|
||||
{
|
||||
unsigned long min, max_low, max_high;
|
||||
|
||||
max_low = max_high = 0;
|
||||
|
||||
find_limits(&min, &max_low, &max_high);
|
||||
|
||||
uc32_bootmem_init(min, max_low);
|
||||
|
||||
#ifdef CONFIG_SWIOTLB
|
||||
swiotlb_init(1);
|
||||
#endif
|
||||
/*
|
||||
* Sparsemem tries to allocate bootmem in memory_present(),
|
||||
* so must be done after the fixed reservations
|
||||
*/
|
||||
uc32_memory_present();
|
||||
|
||||
/*
|
||||
* sparse_init() needs the bootmem allocator up and running.
|
||||
*/
|
||||
sparse_init();
|
||||
|
||||
/*
|
||||
* Now free the memory - free_area_init_node needs
|
||||
* the sparse mem_map arrays initialized by sparse_init()
|
||||
* for memmap_init_zone(), otherwise all PFNs are invalid.
|
||||
*/
|
||||
uc32_bootmem_free(min, max_low, max_high);
|
||||
|
||||
high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1;
|
||||
|
||||
/*
|
||||
* This doesn't seem to be used by the Linux memory manager any
|
||||
* more, but is used by ll_rw_block. If we can get rid of it, we
|
||||
* also get rid of some of the stuff above as well.
|
||||
*
|
||||
* Note: max_low_pfn and max_pfn reflect the number of _pages_ in
|
||||
* the system, not the maximum PFN.
|
||||
*/
|
||||
max_low_pfn = max_low - PHYS_PFN_OFFSET;
|
||||
max_pfn = max_high - PHYS_PFN_OFFSET;
|
||||
}
|
||||
|
||||
static inline int free_area(unsigned long pfn, unsigned long end, char *s)
|
||||
{
|
||||
unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10);
|
||||
|
||||
for (; pfn < end; pfn++) {
|
||||
struct page *page = pfn_to_page(pfn);
|
||||
ClearPageReserved(page);
|
||||
init_page_count(page);
|
||||
__free_page(page);
|
||||
pages++;
|
||||
}
|
||||
|
||||
if (size && s)
|
||||
printk(KERN_INFO "Freeing %s memory: %dK\n", s, size);
|
||||
|
||||
return pages;
|
||||
}
|
||||
|
||||
static inline void
|
||||
free_memmap(unsigned long start_pfn, unsigned long end_pfn)
|
||||
{
|
||||
struct page *start_pg, *end_pg;
|
||||
unsigned long pg, pgend;
|
||||
|
||||
/*
|
||||
* Convert start_pfn/end_pfn to a struct page pointer.
|
||||
*/
|
||||
start_pg = pfn_to_page(start_pfn - 1) + 1;
|
||||
end_pg = pfn_to_page(end_pfn);
|
||||
|
||||
/*
|
||||
* Convert to physical addresses, and
|
||||
* round start upwards and end downwards.
|
||||
*/
|
||||
pg = PAGE_ALIGN(__pa(start_pg));
|
||||
pgend = __pa(end_pg) & PAGE_MASK;
|
||||
|
||||
/*
|
||||
* If there are free pages between these,
|
||||
* free the section of the memmap array.
|
||||
*/
|
||||
if (pg < pgend)
|
||||
free_bootmem(pg, pgend - pg);
|
||||
}
|
||||
|
||||
/*
|
||||
* The mem_map array can get very big. Free the unused area of the memory map.
|
||||
*/
|
||||
static void __init free_unused_memmap(struct meminfo *mi)
|
||||
{
|
||||
unsigned long bank_start, prev_bank_end = 0;
|
||||
unsigned int i;
|
||||
|
||||
/*
|
||||
* This relies on each bank being in address order.
|
||||
* The banks are sorted previously in bootmem_init().
|
||||
*/
|
||||
for_each_bank(i, mi) {
|
||||
struct membank *bank = &mi->bank[i];
|
||||
|
||||
bank_start = bank_pfn_start(bank);
|
||||
|
||||
/*
|
||||
* If we had a previous bank, and there is a space
|
||||
* between the current bank and the previous, free it.
|
||||
*/
|
||||
if (prev_bank_end && prev_bank_end < bank_start)
|
||||
free_memmap(prev_bank_end, bank_start);
|
||||
|
||||
/*
|
||||
* Align up here since the VM subsystem insists that the
|
||||
* memmap entries are valid from the bank end aligned to
|
||||
* MAX_ORDER_NR_PAGES.
|
||||
*/
|
||||
prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* mem_init() marks the free areas in the mem_map and tells us how much
|
||||
* memory is free. This is done after various parts of the system have
|
||||
* claimed their memory after the kernel image.
|
||||
*/
|
||||
void __init mem_init(void)
|
||||
{
|
||||
unsigned long reserved_pages, free_pages;
|
||||
struct memblock_region *reg;
|
||||
int i;
|
||||
|
||||
max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
|
||||
|
||||
/* this will put all unused low memory onto the freelists */
|
||||
free_unused_memmap(&meminfo);
|
||||
|
||||
totalram_pages += free_all_bootmem();
|
||||
|
||||
reserved_pages = free_pages = 0;
|
||||
|
||||
for_each_bank(i, &meminfo) {
|
||||
struct membank *bank = &meminfo.bank[i];
|
||||
unsigned int pfn1, pfn2;
|
||||
struct page *page, *end;
|
||||
|
||||
pfn1 = bank_pfn_start(bank);
|
||||
pfn2 = bank_pfn_end(bank);
|
||||
|
||||
page = pfn_to_page(pfn1);
|
||||
end = pfn_to_page(pfn2 - 1) + 1;
|
||||
|
||||
do {
|
||||
if (PageReserved(page))
|
||||
reserved_pages++;
|
||||
else if (!page_count(page))
|
||||
free_pages++;
|
||||
page++;
|
||||
} while (page < end);
|
||||
}
|
||||
|
||||
/*
|
||||
* Since our memory may not be contiguous, calculate the
|
||||
* real number of pages we have in this system
|
||||
*/
|
||||
printk(KERN_INFO "Memory:");
|
||||
num_physpages = 0;
|
||||
for_each_memblock(memory, reg) {
|
||||
unsigned long pages = memblock_region_memory_end_pfn(reg) -
|
||||
memblock_region_memory_base_pfn(reg);
|
||||
num_physpages += pages;
|
||||
printk(" %ldMB", pages >> (20 - PAGE_SHIFT));
|
||||
}
|
||||
printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
|
||||
|
||||
printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n",
|
||||
nr_free_pages() << (PAGE_SHIFT-10),
|
||||
free_pages << (PAGE_SHIFT-10),
|
||||
reserved_pages << (PAGE_SHIFT-10),
|
||||
totalhigh_pages << (PAGE_SHIFT-10));
|
||||
|
||||
printk(KERN_NOTICE "Virtual kernel memory layout:\n"
|
||||
" vector : 0x%08lx - 0x%08lx (%4ld kB)\n"
|
||||
" vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
||||
" lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
||||
" modules : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
||||
" .init : 0x%p" " - 0x%p" " (%4d kB)\n"
|
||||
" .text : 0x%p" " - 0x%p" " (%4d kB)\n"
|
||||
" .data : 0x%p" " - 0x%p" " (%4d kB)\n",
|
||||
|
||||
VECTORS_BASE, VECTORS_BASE + PAGE_SIZE,
|
||||
DIV_ROUND_UP(PAGE_SIZE, SZ_1K),
|
||||
VMALLOC_START, VMALLOC_END,
|
||||
DIV_ROUND_UP((VMALLOC_END - VMALLOC_START), SZ_1M),
|
||||
PAGE_OFFSET, (unsigned long)high_memory,
|
||||
DIV_ROUND_UP(((unsigned long)high_memory - PAGE_OFFSET), SZ_1M),
|
||||
MODULES_VADDR, MODULES_END,
|
||||
DIV_ROUND_UP((MODULES_END - MODULES_VADDR), SZ_1M),
|
||||
|
||||
__init_begin, __init_end,
|
||||
DIV_ROUND_UP((__init_end - __init_begin), SZ_1K),
|
||||
_stext, _etext,
|
||||
DIV_ROUND_UP((_etext - _stext), SZ_1K),
|
||||
_sdata, _edata,
|
||||
DIV_ROUND_UP((_edata - _sdata), SZ_1K));
|
||||
|
||||
BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR);
|
||||
BUG_ON(TASK_SIZE > MODULES_VADDR);
|
||||
|
||||
if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
|
||||
/*
|
||||
* On a machine this small we won't get
|
||||
* anywhere without overcommit, so turn
|
||||
* it on by default.
|
||||
*/
|
||||
sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
|
||||
}
|
||||
}
|
||||
|
||||
void free_initmem(void)
|
||||
{
|
||||
totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)),
|
||||
__phys_to_pfn(__pa(__init_end)),
|
||||
"init");
|
||||
}
|
||||
|
||||
#ifdef CONFIG_BLK_DEV_INITRD
|
||||
|
||||
static int keep_initrd;
|
||||
|
||||
void free_initrd_mem(unsigned long start, unsigned long end)
|
||||
{
|
||||
if (!keep_initrd)
|
||||
totalram_pages += free_area(__phys_to_pfn(__pa(start)),
|
||||
__phys_to_pfn(__pa(end)),
|
||||
"initrd");
|
||||
}
|
||||
|
||||
static int __init keepinitrd_setup(char *__unused)
|
||||
{
|
||||
keep_initrd = 1;
|
||||
return 1;
|
||||
}
|
||||
|
||||
__setup("keepinitrd", keepinitrd_setup);
|
||||
#endif
|
||||
56
arch/unicore32/mm/iomap.c
Normal file
56
arch/unicore32/mm/iomap.c
Normal file
|
|
@ -0,0 +1,56 @@
|
|||
/*
|
||||
* linux/arch/unicore32/mm/iomap.c
|
||||
*
|
||||
* Code specific to PKUnity SoC and UniCore ISA
|
||||
*
|
||||
* Copyright (C) 2001-2010 GUAN Xue-tao
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Map IO port and PCI memory spaces so that {read,write}[bwl] can
|
||||
* be used to access this memory.
|
||||
*/
|
||||
#include <linux/module.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/ioport.h>
|
||||
#include <linux/io.h>
|
||||
|
||||
#ifdef __io
|
||||
void __iomem *ioport_map(unsigned long port, unsigned int nr)
|
||||
{
|
||||
/* we map PC lagcy 64K IO port to PCI IO space 0x80030000 */
|
||||
return (void __iomem *) (unsigned long)
|
||||
io_p2v((port & 0xffff) + PKUNITY_PCILIO_BASE);
|
||||
}
|
||||
EXPORT_SYMBOL(ioport_map);
|
||||
|
||||
void ioport_unmap(void __iomem *addr)
|
||||
{
|
||||
}
|
||||
EXPORT_SYMBOL(ioport_unmap);
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_PCI
|
||||
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
|
||||
{
|
||||
resource_size_t start = pci_resource_start(dev, bar);
|
||||
resource_size_t len = pci_resource_len(dev, bar);
|
||||
unsigned long flags = pci_resource_flags(dev, bar);
|
||||
|
||||
if (!len || !start)
|
||||
return NULL;
|
||||
if (maxlen && len > maxlen)
|
||||
len = maxlen;
|
||||
if (flags & IORESOURCE_IO)
|
||||
return ioport_map(start, len);
|
||||
if (flags & IORESOURCE_MEM) {
|
||||
if (flags & IORESOURCE_CACHEABLE)
|
||||
return ioremap(start, len);
|
||||
return ioremap_nocache(start, len);
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
EXPORT_SYMBOL(pci_iomap);
|
||||
#endif
|
||||
261
arch/unicore32/mm/ioremap.c
Normal file
261
arch/unicore32/mm/ioremap.c
Normal file
|
|
@ -0,0 +1,261 @@
|
|||
/*
|
||||
* linux/arch/unicore32/mm/ioremap.c
|
||||
*
|
||||
* Code specific to PKUnity SoC and UniCore ISA
|
||||
*
|
||||
* Copyright (C) 2001-2010 GUAN Xue-tao
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
*
|
||||
* Re-map IO memory to kernel address space so that we can access it.
|
||||
*
|
||||
* This allows a driver to remap an arbitrary region of bus memory into
|
||||
* virtual space. One should *only* use readl, writel, memcpy_toio and
|
||||
* so on with such remapped areas.
|
||||
*
|
||||
* Because UniCore only has a 32-bit address space we can't address the
|
||||
* whole of the (physical) PCI space at once. PCI huge-mode addressing
|
||||
* allows us to circumvent this restriction by splitting PCI space into
|
||||
* two 2GB chunks and mapping only one at a time into processor memory.
|
||||
* We use MMU protection domains to trap any attempt to access the bank
|
||||
* that is not currently mapped. (This isn't fully implemented yet.)
|
||||
*/
|
||||
#include <linux/module.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/vmalloc.h>
|
||||
#include <linux/io.h>
|
||||
|
||||
#include <asm/cputype.h>
|
||||
#include <asm/cacheflush.h>
|
||||
#include <asm/mmu_context.h>
|
||||
#include <asm/pgalloc.h>
|
||||
#include <asm/tlbflush.h>
|
||||
#include <asm/sizes.h>
|
||||
|
||||
#include <mach/map.h>
|
||||
#include "mm.h"
|
||||
|
||||
/*
|
||||
* Used by ioremap() and iounmap() code to mark (super)section-mapped
|
||||
* I/O regions in vm_struct->flags field.
|
||||
*/
|
||||
#define VM_UNICORE_SECTION_MAPPING 0x80000000
|
||||
|
||||
int ioremap_page(unsigned long virt, unsigned long phys,
|
||||
const struct mem_type *mtype)
|
||||
{
|
||||
return ioremap_page_range(virt, virt + PAGE_SIZE, phys,
|
||||
__pgprot(mtype->prot_pte));
|
||||
}
|
||||
EXPORT_SYMBOL(ioremap_page);
|
||||
|
||||
/*
|
||||
* Section support is unsafe on SMP - If you iounmap and ioremap a region,
|
||||
* the other CPUs will not see this change until their next context switch.
|
||||
* Meanwhile, (eg) if an interrupt comes in on one of those other CPUs
|
||||
* which requires the new ioremap'd region to be referenced, the CPU will
|
||||
* reference the _old_ region.
|
||||
*
|
||||
* Note that get_vm_area_caller() allocates a guard 4K page, so we need to
|
||||
* mask the size back to 4MB aligned or we will overflow in the loop below.
|
||||
*/
|
||||
static void unmap_area_sections(unsigned long virt, unsigned long size)
|
||||
{
|
||||
unsigned long addr = virt, end = virt + (size & ~(SZ_4M - 1));
|
||||
pgd_t *pgd;
|
||||
|
||||
flush_cache_vunmap(addr, end);
|
||||
pgd = pgd_offset_k(addr);
|
||||
do {
|
||||
pmd_t pmd, *pmdp = pmd_offset((pud_t *)pgd, addr);
|
||||
|
||||
pmd = *pmdp;
|
||||
if (!pmd_none(pmd)) {
|
||||
/*
|
||||
* Clear the PMD from the page table, and
|
||||
* increment the kvm sequence so others
|
||||
* notice this change.
|
||||
*
|
||||
* Note: this is still racy on SMP machines.
|
||||
*/
|
||||
pmd_clear(pmdp);
|
||||
|
||||
/*
|
||||
* Free the page table, if there was one.
|
||||
*/
|
||||
if ((pmd_val(pmd) & PMD_TYPE_MASK) == PMD_TYPE_TABLE)
|
||||
pte_free_kernel(&init_mm, pmd_page_vaddr(pmd));
|
||||
}
|
||||
|
||||
addr += PGDIR_SIZE;
|
||||
pgd++;
|
||||
} while (addr < end);
|
||||
|
||||
flush_tlb_kernel_range(virt, end);
|
||||
}
|
||||
|
||||
static int
|
||||
remap_area_sections(unsigned long virt, unsigned long pfn,
|
||||
size_t size, const struct mem_type *type)
|
||||
{
|
||||
unsigned long addr = virt, end = virt + size;
|
||||
pgd_t *pgd;
|
||||
|
||||
/*
|
||||
* Remove and free any PTE-based mapping, and
|
||||
* sync the current kernel mapping.
|
||||
*/
|
||||
unmap_area_sections(virt, size);
|
||||
|
||||
pgd = pgd_offset_k(addr);
|
||||
do {
|
||||
pmd_t *pmd = pmd_offset((pud_t *)pgd, addr);
|
||||
|
||||
set_pmd(pmd, __pmd(__pfn_to_phys(pfn) | type->prot_sect));
|
||||
pfn += SZ_4M >> PAGE_SHIFT;
|
||||
flush_pmd_entry(pmd);
|
||||
|
||||
addr += PGDIR_SIZE;
|
||||
pgd++;
|
||||
} while (addr < end);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void __iomem *__uc32_ioremap_pfn_caller(unsigned long pfn,
|
||||
unsigned long offset, size_t size, unsigned int mtype, void *caller)
|
||||
{
|
||||
const struct mem_type *type;
|
||||
int err;
|
||||
unsigned long addr;
|
||||
struct vm_struct *area;
|
||||
|
||||
/*
|
||||
* High mappings must be section aligned
|
||||
*/
|
||||
if (pfn >= 0x100000 && (__pfn_to_phys(pfn) & ~SECTION_MASK))
|
||||
return NULL;
|
||||
|
||||
/*
|
||||
* Don't allow RAM to be mapped
|
||||
*/
|
||||
if (pfn_valid(pfn)) {
|
||||
printk(KERN_WARNING "BUG: Your driver calls ioremap() on\n"
|
||||
"system memory. This leads to architecturally\n"
|
||||
"unpredictable behaviour, and ioremap() will fail in\n"
|
||||
"the next kernel release. Please fix your driver.\n");
|
||||
WARN_ON(1);
|
||||
}
|
||||
|
||||
type = get_mem_type(mtype);
|
||||
if (!type)
|
||||
return NULL;
|
||||
|
||||
/*
|
||||
* Page align the mapping size, taking account of any offset.
|
||||
*/
|
||||
size = PAGE_ALIGN(offset + size);
|
||||
|
||||
area = get_vm_area_caller(size, VM_IOREMAP, caller);
|
||||
if (!area)
|
||||
return NULL;
|
||||
addr = (unsigned long)area->addr;
|
||||
|
||||
if (!((__pfn_to_phys(pfn) | size | addr) & ~PMD_MASK)) {
|
||||
area->flags |= VM_UNICORE_SECTION_MAPPING;
|
||||
err = remap_area_sections(addr, pfn, size, type);
|
||||
} else
|
||||
err = ioremap_page_range(addr, addr + size, __pfn_to_phys(pfn),
|
||||
__pgprot(type->prot_pte));
|
||||
|
||||
if (err) {
|
||||
vunmap((void *)addr);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
flush_cache_vmap(addr, addr + size);
|
||||
return (void __iomem *) (offset + addr);
|
||||
}
|
||||
|
||||
void __iomem *__uc32_ioremap_caller(unsigned long phys_addr, size_t size,
|
||||
unsigned int mtype, void *caller)
|
||||
{
|
||||
unsigned long last_addr;
|
||||
unsigned long offset = phys_addr & ~PAGE_MASK;
|
||||
unsigned long pfn = __phys_to_pfn(phys_addr);
|
||||
|
||||
/*
|
||||
* Don't allow wraparound or zero size
|
||||
*/
|
||||
last_addr = phys_addr + size - 1;
|
||||
if (!size || last_addr < phys_addr)
|
||||
return NULL;
|
||||
|
||||
return __uc32_ioremap_pfn_caller(pfn, offset, size, mtype, caller);
|
||||
}
|
||||
|
||||
/*
|
||||
* Remap an arbitrary physical address space into the kernel virtual
|
||||
* address space. Needed when the kernel wants to access high addresses
|
||||
* directly.
|
||||
*
|
||||
* NOTE! We need to allow non-page-aligned mappings too: we will obviously
|
||||
* have to convert them into an offset in a page-aligned mapping, but the
|
||||
* caller shouldn't need to know that small detail.
|
||||
*/
|
||||
void __iomem *
|
||||
__uc32_ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
|
||||
unsigned int mtype)
|
||||
{
|
||||
return __uc32_ioremap_pfn_caller(pfn, offset, size, mtype,
|
||||
__builtin_return_address(0));
|
||||
}
|
||||
EXPORT_SYMBOL(__uc32_ioremap_pfn);
|
||||
|
||||
void __iomem *
|
||||
__uc32_ioremap(unsigned long phys_addr, size_t size)
|
||||
{
|
||||
return __uc32_ioremap_caller(phys_addr, size, MT_DEVICE,
|
||||
__builtin_return_address(0));
|
||||
}
|
||||
EXPORT_SYMBOL(__uc32_ioremap);
|
||||
|
||||
void __iomem *
|
||||
__uc32_ioremap_cached(unsigned long phys_addr, size_t size)
|
||||
{
|
||||
return __uc32_ioremap_caller(phys_addr, size, MT_DEVICE_CACHED,
|
||||
__builtin_return_address(0));
|
||||
}
|
||||
EXPORT_SYMBOL(__uc32_ioremap_cached);
|
||||
|
||||
void __uc32_iounmap(volatile void __iomem *io_addr)
|
||||
{
|
||||
void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr);
|
||||
struct vm_struct **p, *tmp;
|
||||
|
||||
/*
|
||||
* If this is a section based mapping we need to handle it
|
||||
* specially as the VM subsystem does not know how to handle
|
||||
* such a beast. We need the lock here b/c we need to clear
|
||||
* all the mappings before the area can be reclaimed
|
||||
* by someone else.
|
||||
*/
|
||||
write_lock(&vmlist_lock);
|
||||
for (p = &vmlist ; (tmp = *p) ; p = &tmp->next) {
|
||||
if ((tmp->flags & VM_IOREMAP) && (tmp->addr == addr)) {
|
||||
if (tmp->flags & VM_UNICORE_SECTION_MAPPING) {
|
||||
unmap_area_sections((unsigned long)tmp->addr,
|
||||
tmp->size);
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
write_unlock(&vmlist_lock);
|
||||
|
||||
vunmap(addr);
|
||||
}
|
||||
EXPORT_SYMBOL(__uc32_iounmap);
|
||||
39
arch/unicore32/mm/mm.h
Normal file
39
arch/unicore32/mm/mm.h
Normal file
|
|
@ -0,0 +1,39 @@
|
|||
/*
|
||||
* linux/arch/unicore32/mm/mm.h
|
||||
*
|
||||
* Code specific to PKUnity SoC and UniCore ISA
|
||||
*
|
||||
* Copyright (C) 2001-2010 GUAN Xue-tao
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
/* the upper-most page table pointer */
|
||||
extern pmd_t *top_pmd;
|
||||
extern int sysctl_overcommit_memory;
|
||||
|
||||
#define TOP_PTE(x) pte_offset_kernel(top_pmd, x)
|
||||
|
||||
static inline pmd_t *pmd_off(pgd_t *pgd, unsigned long virt)
|
||||
{
|
||||
return pmd_offset((pud_t *)pgd, virt);
|
||||
}
|
||||
|
||||
static inline pmd_t *pmd_off_k(unsigned long virt)
|
||||
{
|
||||
return pmd_off(pgd_offset_k(virt), virt);
|
||||
}
|
||||
|
||||
struct mem_type {
|
||||
unsigned int prot_pte;
|
||||
unsigned int prot_l1;
|
||||
unsigned int prot_sect;
|
||||
};
|
||||
|
||||
const struct mem_type *get_mem_type(unsigned int type);
|
||||
|
||||
extern void __flush_dcache_page(struct address_space *, struct page *);
|
||||
|
||||
void __init bootmem_init(void);
|
||||
void uc32_mm_memblock_reserve(void);
|
||||
Loading…
Reference in a new issue