X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-arm%2Fmemory.h;h=9ba4d7136e6b2dfeaf714df43f35be6c616da9ba;hb=efa0f16b0d0e87ffbef311785fed0815b0240f46;hp=731e321a57d1722779b93babdfae17742aca8440;hpb=71d530cd1b6d97094481002a04c77fea1c8e1c22;p=linux-2.6-omap-h63xx.git diff --git a/include/asm-arm/memory.h b/include/asm-arm/memory.h index 731e321a57d..9ba4d7136e6 100644 --- a/include/asm-arm/memory.h +++ b/include/asm-arm/memory.h @@ -2,6 +2,7 @@ * linux/include/asm-arm/memory.h * * Copyright (C) 2000-2002 Russell King + * modification for nommu, Hyok S. Choi, 2004 * * 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 @@ -26,6 +27,8 @@ #include #include +#ifdef CONFIG_MMU + #ifndef TASK_SIZE /* * TASK_SIZE - the maximum size of a user space task. @@ -47,6 +50,65 @@ #define PAGE_OFFSET UL(0xc0000000) #endif +/* + * The module space lives between the addresses given by TASK_SIZE + * and PAGE_OFFSET - it must be within 32MB of the kernel text. + */ +#define MODULE_END (PAGE_OFFSET) +#define MODULE_START (MODULE_END - 16*1048576) + +#if TASK_SIZE > MODULE_START +#error Top of user space clashes with start of module space +#endif + +/* + * The XIP kernel gets mapped at the bottom of the module vm area. + * Since we use sections to map it, this macro replaces the physical address + * with its virtual address while keeping offset from the base section. + */ +#define XIP_VIRT_ADDR(physaddr) (MODULE_START + ((physaddr) & 0x000fffff)) + +/* + * Allow 16MB-aligned ioremap pages + */ +#define IOREMAP_MAX_ORDER 24 + +#else /* CONFIG_MMU */ + +/* + * The limitation of user task size can grow up to the end of free ram region. + * It is difficult to define and perhaps will never meet the original meaning + * of this define that was meant to. + * Fortunately, there is no reference for this in noMMU mode, for now. + */ +#ifndef TASK_SIZE +#define TASK_SIZE (CONFIG_DRAM_SIZE) +#endif + +#ifndef TASK_UNMAPPED_BASE +#define TASK_UNMAPPED_BASE UL(0x00000000) +#endif + +#ifndef PHYS_OFFSET +#define PHYS_OFFSET (CONFIG_DRAM_BASE) +#endif + +#ifndef END_MEM +#define END_MEM (CONFIG_DRAM_BASE + CONFIG_DRAM_SIZE) +#endif + +#ifndef PAGE_OFFSET +#define PAGE_OFFSET (PHYS_OFFSET) +#endif + +/* + * The module can be at any place in ram in nommu mode. + */ +#define MODULE_END (END_MEM) +#define MODULE_START (PHYS_OFFSET) + +#endif /* !CONFIG_MMU */ + /* * Size of DMA-consistent memory region. Must be multiple of 2M, * between 2MB and 14MB inclusive. @@ -71,24 +133,6 @@ #define __phys_to_pfn(paddr) ((paddr) >> PAGE_SHIFT) #define __pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT) -/* - * The module space lives between the addresses given by TASK_SIZE - * and PAGE_OFFSET - it must be within 32MB of the kernel text. - */ -#define MODULE_END (PAGE_OFFSET) -#define MODULE_START (MODULE_END - 16*1048576) - -#if TASK_SIZE > MODULE_START -#error Top of user space clashes with start of module space -#endif - -/* - * The XIP kernel gets mapped at the bottom of the module vm area. - * Since we use sections to map it, this macro replaces the physical address - * with its virtual address while keeping offset from the base section. - */ -#define XIP_VIRT_ADDR(physaddr) (MODULE_START + ((physaddr) & 0x000fffff)) - #ifndef __ASSEMBLY__ /* @@ -171,8 +215,12 @@ static inline __deprecated void *bus_to_virt(unsigned long x) * virt_addr_valid(k) indicates whether a virtual address is valid */ #ifndef CONFIG_DISCONTIGMEM + #define ARCH_PFN_OFFSET PHYS_PFN_OFFSET + +#ifndef CONFIG_SPARSEMEM #define pfn_valid(pfn) ((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr)) +#endif #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) @@ -186,6 +234,7 @@ static inline __deprecated void *bus_to_virt(unsigned long x) * around in memory. */ #include + #define arch_pfn_to_nid(pfn) PFN_TO_NID(pfn) #define arch_local_page_offset(pfn, nid) LOCAL_MAP_NR((pfn) << PAGE_SHIFT) @@ -212,6 +261,43 @@ static inline __deprecated void *bus_to_virt(unsigned long x) */ #define PHYS_TO_NID(addr) PFN_TO_NID((addr) >> PAGE_SHIFT) +/* + * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory + * and returns the mem_map of that node. + */ +#define ADDR_TO_MAPBASE(kaddr) NODE_MEM_MAP(KVADDR_TO_NID(kaddr)) + +/* + * Given a page frame number, find the owning node of the memory + * and returns the mem_map of that node. + */ +#define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn)) + +#ifdef NODE_MEM_SIZE_BITS +#define NODE_MEM_SIZE_MASK ((1 << NODE_MEM_SIZE_BITS) - 1) + +/* + * Given a kernel address, find the home node of the underlying memory. + */ +#define KVADDR_TO_NID(addr) \ + (((unsigned long)(addr) - PAGE_OFFSET) >> NODE_MEM_SIZE_BITS) + +/* + * Given a page frame number, convert it to a node id. + */ +#define PFN_TO_NID(pfn) \ + (((pfn) - PHYS_PFN_OFFSET) >> (NODE_MEM_SIZE_BITS - PAGE_SHIFT)) + +/* + * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory + * and returns the index corresponding to the appropriate page in the + * node's mem_map. + */ +#define LOCAL_MAP_NR(addr) \ + (((unsigned long)(addr) & NODE_MEM_SIZE_MASK) >> PAGE_SHIFT) + +#endif /* NODE_MEM_SIZE_BITS */ + #endif /* !CONFIG_DISCONTIGMEM */ /*