[ARM] 3016/1: Replace map_desc.physical with map_desc.pfn

Patch from Deepak Saxena

Convert map_desc.physical to map_desc.pfn. This allows us to add
support for 36-bit addressed physical devices in the static maps
without having to resort to u64 variables.

Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mm/init.c

@@ -262,8 +262,8 @@ bootmem_init_node(int node, int initrd_node, struct meminfo *mi)
 		if (end_pfn < end)
 			end_pfn = end;
 
-		map.physical = mi->bank[i].start;
-		map.virtual = __phys_to_virt(map.physical);
+		map.pfn = __phys_to_pfn(mi->bank[i].start);
+		map.virtual = __phys_to_virt(mi->bank[i].start);
 		map.length = mi->bank[i].size;
 		map.type = MT_MEMORY;
 
@@ -365,7 +365,7 @@ static void __init bootmem_init(struct meminfo *mi)
 
 #ifdef CONFIG_XIP_KERNEL
 #error needs fixing
-	p->physical   = CONFIG_XIP_PHYS_ADDR & PMD_MASK;
+	p->pfn        = __phys_to_pfn(CONFIG_XIP_PHYS_ADDR & PMD_MASK);
 	p->virtual    = (unsigned long)&_stext & PMD_MASK;
 	p->length     = ((unsigned long)&_etext - p->virtual + ~PMD_MASK) & PMD_MASK;
 	p->type       = MT_ROM;
@@ -439,14 +439,14 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
 	 * Map the cache flushing regions.
 	 */
 #ifdef FLUSH_BASE
-	map.physical = FLUSH_BASE_PHYS;
+	map.pfn = __phys_to_pfn(FLUSH_BASE_PHYS);
 	map.virtual = FLUSH_BASE;
 	map.length = PGDIR_SIZE;
 	map.type = MT_CACHECLEAN;
 	create_mapping(&map);
 #endif
 #ifdef FLUSH_BASE_MINICACHE
-	map.physical = FLUSH_BASE_PHYS + PGDIR_SIZE;
+	map.pfn = __phys_to_pfn(FLUSH_BASE_PHYS + PGDIR_SIZE);
 	map.virtual = FLUSH_BASE_MINICACHE;
 	map.length = PGDIR_SIZE;
 	map.type = MT_MINICLEAN;
@@ -464,7 +464,7 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
 	 * location (0xffff0000).  If we aren't using high-vectors, also
 	 * create a mapping at the low-vectors virtual address.
 	 */
-	map.physical = virt_to_phys(vectors);
+	map.pfn = __phys_to_pfn(virt_to_phys(vectors));
 	map.virtual = 0xffff0000;
 	map.length = PAGE_SIZE;
 	map.type = MT_HIGH_VECTORS;

arch/arm/mm/mm-armv.c

@@ -483,7 +483,7 @@ void __init create_mapping(struct map_desc *md)
 	if (md->virtual != vectors_base() && md->virtual < TASK_SIZE) {
 		printk(KERN_WARNING "BUG: not creating mapping for "
 		       "0x%08lx at 0x%08lx in user region\n",
-		       md->physical, md->virtual);
+		       __pfn_to_phys(md->pfn), md->virtual);
 		return;
 	}
 
@@ -491,7 +491,7 @@ void __init create_mapping(struct map_desc *md)
 	    md->virtual >= PAGE_OFFSET && md->virtual < VMALLOC_END) {
 		printk(KERN_WARNING "BUG: mapping for 0x%08lx at 0x%08lx "
 		       "overlaps vmalloc space\n",
-		       md->physical, md->virtual);
+		       __pfn_to_phys(md->pfn), md->virtual);
 	}
 
 	domain	  = mem_types[md->type].domain;
@@ -500,14 +500,14 @@ void __init create_mapping(struct map_desc *md)
 	prot_sect = mem_types[md->type].prot_sect | PMD_DOMAIN(domain);
 
 	virt   = md->virtual;
-	off    = md->physical - virt;
+	off    = __pfn_to_phys(md->pfn) - virt;
 	length = md->length;
 
 	if (mem_types[md->type].prot_l1 == 0 &&
 	    (virt & 0xfffff || (virt + off) & 0xfffff || (virt + length) & 0xfffff)) {
 		printk(KERN_WARNING "BUG: map for 0x%08lx at 0x%08lx can not "
 		       "be mapped using pages, ignoring.\n",
-		       md->physical, md->virtual);
+		       __pfn_to_phys(md->pfn), md->virtual);
 		return;
 	}
 

include/asm-arm/mach/map.h

@@ -11,7 +11,7 @@
  */
 struct map_desc {
 	unsigned long virtual;
-	unsigned long physical;
+	unsigned long pfn;
 	unsigned long length;
 	unsigned int type;
 };
@@ -27,6 +27,9 @@ struct meminfo;
 #define MT_ROM			6
 #define MT_IXP2000_DEVICE	7
 
+#define	__phys_to_pfn(paddr)	(paddr >> PAGE_SHIFT)
+#define	__pfn_to_phys(pfn)	(pfn << PAGE_SHIFT)
+
 extern void create_memmap_holes(struct meminfo *);
 extern void memtable_init(struct meminfo *);
 extern void iotable_init(struct map_desc *, int);