X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-arm%2Fmemory.h;h=20928940759545f0caefc7ed142a9bd308b8802f;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=e47bea7d17237de5a0cf86d998ff684ec5a5d8e7;hpb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;p=linux-2.6.git

diff --git a/include/asm-arm/memory.h b/include/asm-arm/memory.h
index e47bea7d1..209289407 100644
--- a/include/asm-arm/memory.h
+++ b/include/asm-arm/memory.h
@@ -12,29 +12,48 @@
 #ifndef __ASM_ARM_MEMORY_H
 #define __ASM_ARM_MEMORY_H
 
+/*
+ * Allow for constants defined here to be used from assembly code
+ * by prepending the UL suffix only with actual C code compilation.
+ */
+#ifndef __ASSEMBLY__
+#define UL(x) (x##UL)
+#else
+#define UL(x) (x)
+#endif
+
 #include <linux/config.h>
 #include <linux/compiler.h>
 #include <asm/arch/memory.h>
+#include <asm/sizes.h>
 
 #ifndef TASK_SIZE
 /*
  * TASK_SIZE - the maximum size of a user space task.
  * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area
  */
-#define TASK_SIZE		(0xbf000000UL)
-#define TASK_UNMAPPED_BASE	(0x40000000UL)
+#define TASK_SIZE		UL(0xbf000000)
+#define TASK_UNMAPPED_BASE	UL(0x40000000)
 #endif
 
 /*
  * The maximum size of a 26-bit user space task.
  */
-#define TASK_SIZE_26		(0x04000000UL)
+#define TASK_SIZE_26		UL(0x04000000)
 
 /*
  * Page offset: 3GB
  */
 #ifndef PAGE_OFFSET
-#define PAGE_OFFSET		(0xc0000000UL)
+#define PAGE_OFFSET		UL(0xc0000000)
+#endif
+
+/*
+ * Size of DMA-consistent memory region.  Must be multiple of 2M,
+ * between 2MB and 14MB inclusive.
+ */
+#ifndef CONSISTENT_DMA_SIZE
+#define CONSISTENT_DMA_SIZE SZ_2M
 #endif
 
 /*
@@ -47,6 +66,12 @@
 #define __phys_to_virt(x)	((x) - PHYS_OFFSET + PAGE_OFFSET)
 #endif
 
+/*
+ * Convert a physical address to a Page Frame Number and back
+ */
+#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.
@@ -58,6 +83,13 @@
 #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__
 
 /*
@@ -105,6 +137,7 @@ static inline void *phys_to_virt(unsigned long x)
  */
 #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)
 
 /*
  * Virtual <-> DMA view memory address translations
@@ -139,12 +172,10 @@ 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 page_to_pfn(page)	(((page) - mem_map) + PHYS_PFN_OFFSET)
-#define pfn_to_page(pfn)	((mem_map + (pfn)) - PHYS_PFN_OFFSET)
+#define ARCH_PFN_OFFSET		PHYS_PFN_OFFSET
 #define pfn_valid(pfn)		((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr))
 
-#define virt_to_page(kaddr)	(pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
+#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)
 
 #define PHYS_TO_NID(addr)	(0)
@@ -156,16 +187,24 @@ static inline __deprecated void *bus_to_virt(unsigned long x)
  * around in memory.
  */
 #include <linux/numa.h>
-
-#define page_to_pfn(page)					\
-	(( (page) - page_zone(page)->zone_mem_map)		\
-	  + page_zone(page)->zone_start_pfn)
-#define pfn_to_page(pfn)					\
-	(PFN_TO_MAPBASE(pfn) + LOCAL_MAP_NR((pfn) << PAGE_SHIFT))
-#define pfn_valid(pfn)		(PFN_TO_NID(pfn) < MAX_NUMNODES)
+#define arch_pfn_to_nid(pfn)	PFN_TO_NID(pfn)
+#define arch_local_page_offset(pfn, nid) LOCAL_MAP_NR((pfn) << PAGE_SHIFT)
+
+#define pfn_valid(pfn)						\
+	({							\
+		unsigned int nid = PFN_TO_NID(pfn);		\
+		int valid = nid < MAX_NUMNODES;			\
+		if (valid) {					\
+			pg_data_t *node = NODE_DATA(nid);	\
+			valid = (pfn - node->node_start_pfn) <	\
+				node->node_spanned_pages;	\
+		}						\
+		valid;						\
+	})
 
 #define virt_to_page(kaddr)					\
 	(ADDR_TO_MAPBASE(kaddr) + LOCAL_MAP_NR(kaddr))
+
 #define virt_addr_valid(kaddr)	(KVADDR_TO_NID(kaddr) < MAX_NUMNODES)
 
 /*
@@ -195,6 +234,16 @@ static inline __deprecated void *bus_to_virt(unsigned long x)
 #define virt_to_dma(dev, addr)		(__arch_virt_to_dma(dev, addr))
 #endif
 
+/*
+ * Optional coherency support.  Currently used only by selected
+ * Intel XSC3-based systems.
+ */
+#ifndef arch_is_coherent
+#define arch_is_coherent()		0
+#endif
+
 #endif
 
+#include <asm-generic/memory_model.h>
+
 #endif