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authorSantosh Shilimkar <santosh.shilimkar@ti.com>2013-07-01 14:20:35 -0400
committerMark Brown <broonie@kernel.org>2015-02-16 11:32:07 +0900
commit23c1cc125ba3512debc32b26b139e3ae291f73f5 (patch)
treeaab1d1cd06acad28f9c8058258e2f48d8e127c0e /arch/arm
parent43db234c6715767018fe007f5bb38a25044a5c24 (diff)
downloadlinux-linaro-stable-23c1cc125ba3512debc32b26b139e3ae291f73f5.tar.gz
of: Specify initrd location using 64-bit
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. There has been quite a bit of debate about whether to use u64 or phys_addr_t. It was concluded to stick to u64 to be consistent with rest of the device tree code. As summarized by Geert, "The address to load the initrd is decided by the bootloader/user and set at that point later in time. The dtb should not be tied to the kernel you are booting" More details on the discussion can be found here: https://lkml.org/lkml/2013/6/20/690 https://lkml.org/lkml/2012/9/13/544 Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Grant Likely <grant.likely@linaro.org> (cherry picked from commit 374d5c9964c10373ba39bbe934f4262eb87d7114) Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mm/init.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 9a5cdc01fcdf..afeaef7a8ffc 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;