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| author | Santosh Shilimkar <santosh.shilimkar@ti.com> | 2013-07-01 14:20:35 -0400 |
|---|---|---|
| committer | Grant Likely <grant.likely@linaro.org> | 2013-07-24 11:10:01 +0100 |
| commit | 374d5c9964c10373ba39bbe934f4262eb87d7114 (patch) | |
| tree | 3ddcb05c32181506d7619d6bffedaa53aee2fc95 /include/linux/of_fdt.h | |
| parent | dcde863297256a9cade5422a2d469ba828f60beb (diff) | |
| download | lwn-374d5c9964c10373ba39bbe934f4262eb87d7114.tar.gz lwn-374d5c9964c10373ba39bbe934f4262eb87d7114.zip | |
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>
Diffstat (limited to 'include/linux/of_fdt.h')
| -rw-r--r-- | include/linux/of_fdt.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h index ed136ad698ce..4a17939b95cc 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 */ |