/* * linux/arch/unicore32/include/asm/memory.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. * * Note: this file should not be included by non-asm/.h files */ #ifndef __UNICORE_MEMORY_H__ #define __UNICORE_MEMORY_H__ #include <linux/compiler.h> #include <linux/const.h> #include <asm/sizes.h> #include <mach/memory.h> /* * Allow for constants defined here to be used from assembly code * by prepending the UL suffix only with actual C code compilation. */ #define UL(x) _AC(x, UL) /* * PAGE_OFFSET - the virtual address of the start of the kernel image * TASK_SIZE - the maximum size of a user space task. * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area */ #define PAGE_OFFSET UL(0xC0000000) #define TASK_SIZE (PAGE_OFFSET - UL(0x41000000)) #define TASK_UNMAPPED_BASE (PAGE_OFFSET / 3) /* * The module space lives between the addresses given by TASK_SIZE * and PAGE_OFFSET - it must be within 32MB of the kernel text. */ #define MODULES_VADDR (PAGE_OFFSET - 16*1024*1024) #if TASK_SIZE > MODULES_VADDR #error Top of user space clashes with start of module space #endif #define MODULES_END (PAGE_OFFSET) /* * Allow 16MB-aligned ioremap pages */ #define IOREMAP_MAX_ORDER 24 /* * Physical vs virtual RAM address space conversion. These are * private definitions which should NOT be used outside memory.h * files. Use virt_to_phys/phys_to_virt/__pa/__va instead. */ #ifndef __virt_to_phys #define __virt_to_phys(x) ((x) - PAGE_OFFSET + PHYS_OFFSET) #define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET) #endif /* * Convert a page to/from a physical address */ #define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page))) #define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys))) #ifndef __ASSEMBLY__ #ifndef arch_adjust_zones #define arch_adjust_zones(size, holes) do { } while (0) #endif /* * PFNs are used to describe any physical page; this means * PFN 0 == physical address 0. * * This is the PFN of the first RAM page in the kernel * direct-mapped view. We assume this is the first page * of RAM in the mem_map as well. */ #define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT) /* * Drivers should NOT use these either. */ #define __pa(x) __virt_to_phys((unsigned long)(x)) #define __va(x) ((void *)__phys_to_virt((unsigned long)(x))) #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) /* * Conversion between a struct page and a physical address. * * page_to_pfn(page) convert a struct page * to a PFN number * pfn_to_page(pfn) convert a _valid_ PFN number to struct page * * * virt_to_page(k) convert a _valid_ virtual address to struct page * * virt_addr_valid(k) indicates whether a virtual address is valid */ #define ARCH_PFN_OFFSET PHYS_PFN_OFFSET #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && \ (unsigned long)(kaddr) < (unsigned long)high_memory) #endif #include <asm-generic/memory_model.h> #endifOverall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Guan Xuetao | 168 | 99.41% | 1 | 50.00% |
| Jiang Liu | 1 | 0.59% | 1 | 50.00% |
| Total | 169 | 100.00% | 2 | 100.00% |