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of: Specify initrd location using 64-bit

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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>
This commit is contained in:
Santosh Shilimkar 2013-07-01 14:20:35 -04:00 committed by Grant Likely
parent dcde863297
commit 374d5c9964
13 changed files with 20 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arc/mm/init.c
View File

@ -127,9 +127,8 @@ void __init free_initrd_mem(unsigned long start, unsigned long end)
#endif
#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)
{
pr_err("%s(%lx, %lx)\n", __func__, start, end);
pr_err("%s(%llx, %llx)\n", __func__, start, end);
}
#endif /* CONFIG_OF_FLATTREE */

2
arch/arm/mm/init.c
View File

@ -77,7 +77,7 @@ 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;

3
arch/arm64/mm/init.c
View File

@ -44,8 +44,7 @@ static unsigned long phys_initrd_size __initdata = 0;
phys_addr_t memstart_addr __read_mostly = 0;
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;

3
arch/c6x/kernel/devicetree.c
View File

@ -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);

5
arch/metag/mm/init.c
View File

@ -407,10 +407,9 @@ void free_initrd_mem(unsigned long start, unsigned long end)
#endif
#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)
{
pr_err("%s(%lx, %lx)\n",
pr_err("%s(%llx, %llx)\n",
__func__, start, end);
}
#endif /* CONFIG_OF_FLATTREE */

3
arch/microblaze/kernel/prom.c
View File

@ -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);

3
arch/mips/kernel/prom.c
View File

@ -58,8 +58,7 @@ 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);

3
arch/openrisc/kernel/prom.c
View File

@ -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);

3
arch/powerpc/kernel/prom.c
View File

@ -550,8 +550,7 @@ 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);

3
arch/x86/kernel/devicetree.c
View File

@ -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);

3
arch/xtensa/kernel/setup.c
View File

@ -170,8 +170,7 @@ static int __init parse_tag_fdt(const bp_tag_t *tag)
__tagtable(BP_TAG_FDT, parse_tag_fdt);
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 = (void *)__va(start);
initrd_end = (void *)__va(end);

10
drivers/of/fdt.c
View File

@ -550,7 +550,8 @@ 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... ");
@ -558,15 +559,16 @@ 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)

3
include/linux/of_fdt.h
View File

@ -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 */