Pass a physical address from the boot loader for the location of the

initrd instead of a virtual address; the boot loader has no business
knowing the kernel's virtual to physical mappings, which could
change in the future.

arch/arm/boot/Makefile

@@ -14,14 +14,12 @@ ifeq ($(CONFIG_CPU_26),y)
 ZRELADDR	 = 0x02080000
 PARAMS_PHYS	 = 0x0207c000
 INITRD_PHYS	 = 0x02180000
-INITRD_VIRT	 = 0x02180000
 endif
 
 ifeq ($(CONFIG_ARCH_RPC),y)
 ZRELADDR	 = 0x10008000
 PARAMS_PHYS	 = 0x10000100
 INITRD_PHYS	 = 0x18000000
-INITRD_VIRT	 = 0xc8000000
 endif
 
 ifeq ($(CONFIG_ARCH_CLPS7500),y)
@@ -32,7 +30,6 @@ ifeq ($(CONFIG_ARCH_EBSA110),y)
 ZRELADDR	 = 0x00008000
 PARAMS_PHYS	 = 0x00000400
 INITRD_PHYS	 = 0x00800000
-INITRD_VIRT	 = 0xc0800000
 endif
 
 ifeq ($(CONFIG_ARCH_SHARK),y)
@@ -44,14 +41,12 @@ ifeq ($(CONFIG_FOOTBRIDGE),y)
 ZRELADDR	 = 0x00008000
 PARAMS_PHYS	 = 0x00000100
 INITRD_PHYS	 = 0x00800000
-INITRD_VIRT	 = 0xc0800000
 endif
 
 ifeq ($(CONFIG_ARCH_INTEGRATOR),y)
 ZRELADDR	 = 0x00008000
 PARAMS_PHYS	 = 0x00000100
 INITRD_PHYS	 = 0x00800000
-INITRD_VIRT	 = 0xc0800000
 endif
 
 ifeq ($(CONFIG_ARCH_CAMELOT),y)
@@ -75,11 +70,9 @@ endif
 # Should probably have some agreement on these...
 ifeq ($(CONFIG_ARCH_P720T),y)
 INITRD_PHYS	 = 0xc0400000
-INITRD_VIRT	 = 0xc0400000
 endif
 ifeq ($(CONFIG_ARCH_CDB89712),y)
 INITRD_PHYS	 = 0x00700000
-INITRD_VIRT	 = 0xc0300000
 endif
 
 ifeq ($(CONFIG_ARCH_SA1100),y)
@@ -119,7 +112,7 @@ ZTEXTADDR	=0
 ZBSSADDR	=ALIGN(4)
 endif
 
-export	SYSTEM ZTEXTADDR ZBSSADDR ZRELADDR INITRD_PHYS INITRD_VIRT PARAMS_PHYS
+export	SYSTEM ZTEXTADDR ZBSSADDR ZRELADDR INITRD_PHYS PARAMS_PHYS
 
 Image:	$(CONFIGURE) $(SYSTEM)
 	$(OBJCOPY) -O binary -R .note -R .comment -S $(SYSTEM) $@
@@ -139,7 +132,7 @@ bootp/bootp: zImage initrd
 	@$(MAKE) -C bootp bootp
 
 initrd:
-	@test "$(INITRD_VIRT)" != "" || (echo This architecture does not support INITRD; exit -1)
+	@test "$(INITRD_PHYS)" != "" || (echo This architecture does not support INITRD; exit -1)
 	@test "$(INITRD)" != "" || (echo You must specify INITRD; exit -1)
 
 install: $(CONFIGURE) Image

arch/arm/boot/bootp/Makefile

@@ -5,7 +5,6 @@
 ZSYSTEM		=$(TOPDIR)/arch/arm/boot/zImage
 ZLDFLAGS	=-p -X -T bootp.lds \
 		 --defsym initrd_addr=$(INITRD_PHYS) \
-		 --defsym initrd_virt=$(INITRD_VIRT) \
 		 --defsym params=$(PARAMS_PHYS) \
 		 --defsym kernel_addr=$(ZTEXTADDR)
 

arch/arm/boot/bootp/init.S

@@ -102,8 +102,8 @@ data:		.word	initrd_start
 		.word	kernel_len
 
 		.word	0x54410001		@ r4 = ATAG_CORE
-		.word	0x54410005		@ r5 = ATAG_INITRD
-		.word	initrd_virt		@ r6
+		.word	0x54420005		@ r5 = ATAG_INITRD
+		.word	initrd_addr		@ r6
 		.word	initrd_len		@ r7
 		.word	params			@ r8
 

arch/arm/kernel/setup.c

@@ -517,6 +517,20 @@ static int __init parse_tag_initrd(const struct tag *tag)
 
 __tagtable(ATAG_INITRD, parse_tag_initrd);
 
+static int __init parse_tag_initrd2(const struct tag *tag)
+{
+	unsigned long start = 0;
+
+	if (tag->u.initrd.size) {
+		start = (unsigned long)phys_to_virt(tag->u.initrd.start);
+
+		setup_initrd(start, tag->u.initrd.size);
+	}
+	return 0;
+}
+
+__tagtable(ATAG_INITRD2, parse_tag_initrd2);
+
 static int __init parse_tag_serialnr(const struct tag *tag)
 {
 	system_serial_low = tag->u.serialnr.low;

include/asm-arm/setup.h

@@ -131,8 +131,15 @@ struct tag_ramdisk {
 };
 
 /* describes where the compressed ramdisk image lives */
+/*
+ * this one accidentally used virtual addresses - as such,
+ * its depreciated.
+ */
 #define ATAG_INITRD	0x54410005
 
+/* describes where the compressed ramdisk image lives */
+#define ATAG_INITRD2	0x54420005
+
 struct tag_initrd {
 	u32 start;	/* physical start address */
 	u32 size;	/* size of compressed ramdisk image in bytes */