[PATCH] of: specify initrd location using 64-bit

[Cyril Chemparathy <cyril@ti.com>]

On some PAE architectures, the entire range of physical memory could reside
outside the 32-bit limit.  These systems need the ability to specify the
initrd location using 64-bit numbers.

This patch globally modifies the early_init_dt_setup_initrd_arch() function to
use 64-bit numbers instead of the current unsigned long.
---
 arch/arm/mm/init.c            |    2 +-
 arch/c6x/kernel/devicetree.c  |    3 +--
 arch/microblaze/kernel/prom.c |    3 +--
 arch/mips/kernel/prom.c       |    3 +--
 arch/openrisc/kernel/prom.c   |    3 +--
 arch/powerpc/kernel/prom.c    |    3 +--
 arch/x86/kernel/devicetree.c  |    3 +--
 drivers/of/fdt.c              |   10 ++++++----
 include/linux/of_fdt.h        |    3 +--
 9 files changed, 14 insertions(+), 19 deletions(-)

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index ad722f1..579792c 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -76,7 +76,7 @@ static int __init parse_tag_initrd2(const struct tag *tag)
 __tagtable(ATAG_INITRD2, parse_tag_initrd2);
 
 #ifdef CONFIG_OF_FLATTREE
-void __init early_init_dt_setup_initrd_arch(unsigned long start, unsigned long end)
+void __init early_init_dt_setup_initrd_arch(u64 start, u64 end)
 {
 	phys_initrd_start = start;
 	phys_initrd_size = end - start;
diff --git a/arch/c6x/kernel/devicetree.c b/arch/c6x/kernel/devicetree.c
index bdb56f0..287d0e6 100644
--- a/arch/c6x/kernel/devicetree.c
+++ b/arch/c6x/kernel/devicetree.c
@@ -33,8 +33,7 @@ void __init early_init_devtree(void *params)
 
 
 #ifdef CONFIG_BLK_DEV_INITRD
-void __init early_init_dt_setup_initrd_arch(unsigned long start,
-		unsigned long end)
+void __init early_init_dt_setup_initrd_arch(u64 start, u64 end)
 {
 	initrd_start = (unsigned long)__va(start);
 	initrd_end = (unsigned long)__va(end);
diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
index 4a764cc..cecd42c 100644
--- a/arch/microblaze/kernel/prom.c
+++ b/arch/microblaze/kernel/prom.c
@@ -136,8 +136,7 @@ void __init early_init_devtree(void *params)
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
-void __init early_init_dt_setup_initrd_arch(unsigned long start,
-		unsigned long end)
+void __init early_init_dt_setup_initrd_arch(u64 start, u64 end)
 {
 	initrd_start = (unsigned long)__va(start);
 	initrd_end = (unsigned long)__va(end);
diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c
index 028f6f8..e37e0dc 100644
--- a/arch/mips/kernel/prom.c
+++ b/arch/mips/kernel/prom.c
@@ -41,8 +41,7 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
-void __init early_init_dt_setup_initrd_arch(unsigned long start,
-					    unsigned long end)
+void __init early_init_dt_setup_initrd_arch(u64 start, u64 end)
 {
 	initrd_start = (unsigned long)__va(start);
 	initrd_end = (unsigned long)__va(end);
diff --git a/arch/openrisc/kernel/prom.c b/arch/openrisc/kernel/prom.c
index 5869e3f..150215a 100644
--- a/arch/openrisc/kernel/prom.c
+++ b/arch/openrisc/kernel/prom.c
@@ -96,8 +96,7 @@ void __init early_init_devtree(void *params)
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
-void __init early_init_dt_setup_initrd_arch(unsigned long start,
-		unsigned long end)
+void __init early_init_dt_setup_initrd_arch(u64 start, u64 end)
 {
 	initrd_start = (unsigned long)__va(start);
 	initrd_end = (unsigned long)__va(end);
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 37725e8..ac15f63 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -549,8 +549,7 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
-void __init early_init_dt_setup_initrd_arch(unsigned long start,
-		unsigned long end)
+void __init early_init_dt_setup_initrd_arch(u64 start, u64 end)
 {
 	initrd_start = (unsigned long)__va(start);
 	initrd_end = (unsigned long)__va(end);
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index b158152..2fbad6b 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -52,8 +52,7 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
-void __init early_init_dt_setup_initrd_arch(unsigned long start,
-					    unsigned long end)
+void __init early_init_dt_setup_initrd_arch(u64 start, u64 end)
 {
 	initrd_start = (unsigned long)__va(start);
 	initrd_end = (unsigned long)__va(end);
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 91a375f..2ff8b7a 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -554,7 +554,8 @@ int __init of_flat_dt_match(unsigned long node, const char *const *compat)
  */
 void __init early_init_dt_check_for_initrd(unsigned long node)
 {
-	unsigned long start, end, len;
+	u64 start, end;
+	unsigned long len;
 	__be32 *prop;
 
 	pr_debug("Looking for initrd properties... ");
@@ -562,15 +563,16 @@ void __init early_init_dt_check_for_initrd(unsigned long node)
 	prop = of_get_flat_dt_prop(node, "linux,initrd-start", &len);
 	if (!prop)
 		return;
-	start = of_read_ulong(prop, len/4);
+	start = of_read_number(prop, len/4);
 
 	prop = of_get_flat_dt_prop(node, "linux,initrd-end", &len);
 	if (!prop)
 		return;
-	end = of_read_ulong(prop, len/4);
+	end = of_read_number(prop, len/4);
 
 	early_init_dt_setup_initrd_arch(start, end);
-	pr_debug("initrd_start=0x%lx  initrd_end=0x%lx\n", start, end);
+	pr_debug("initrd_start=0x%llx  initrd_end=0x%llx\n",
+		 (unsigned long long)start, (unsigned long long)end);
 }
 #else
 inline void early_init_dt_check_for_initrd(unsigned long node)
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index ed136ad..4a17939 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -106,8 +106,7 @@ extern u64 dt_mem_next_cell(int s, __be32 **cellp);
  * physical addresses.
  */
 #ifdef CONFIG_BLK_DEV_INITRD
-extern void early_init_dt_setup_initrd_arch(unsigned long start,
-					    unsigned long end);
+extern void early_init_dt_setup_initrd_arch(u64 start, u64 end);
 #endif
 
 /* Early flat tree scan hooks */
-- 
1.7.9.5