#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>
* 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
/*
#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.
#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__
/*
*/
#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
#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 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)
/*