From 374d5c9964c10373ba39bbe934f4262eb87d7114 Mon Sep 17 00:00:00 2001 From: Santosh Shilimkar Date: Mon, 1 Jul 2013 14:20:35 -0400 Subject: 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 Acked-by: Rob Herring Acked-by: Vineet Gupta Acked-by: Jean-Christophe PLAGNIOL-VILLARD Signed-off-by: Grant Likely --- arch/microblaze/kernel/prom.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c index 0a2c68f9f9b0..62e2e8f2c5d6 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); -- cgit v1.2.3 From a1727da599ad030ccaf4073473fd235c8ee28219 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Wed, 28 Aug 2013 21:18:32 +0100 Subject: of: consolidate definition of early_init_dt_alloc_memory_arch() Most architectures use the same implementation. Collapse the common ones into a single weak function that can be overridden. Signed-off-by: Grant Likely --- arch/arc/kernel/devtree.c | 6 ------ arch/arm64/kernel/setup.c | 5 ----- arch/c6x/kernel/devicetree.c | 5 ----- arch/microblaze/kernel/prom.c | 5 ----- arch/openrisc/kernel/prom.c | 5 ----- arch/powerpc/kernel/prom.c | 5 ----- drivers/of/fdt.c | 12 ++++++++++++ 7 files changed, 12 insertions(+), 31 deletions(-) (limited to 'arch/microblaze') diff --git a/arch/arc/kernel/devtree.c b/arch/arc/kernel/devtree.c index bdee3a812052..2340af0e1d6f 100644 --- a/arch/arc/kernel/devtree.c +++ b/arch/arc/kernel/devtree.c @@ -18,12 +18,6 @@ #include #include -/* called from unflatten_device_tree() to bootstrap devicetree itself */ -void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) -{ - return __va(memblock_alloc(size, align)); -} - /** * setup_machine_fdt - Machine setup when an dtb was passed to the kernel * @dt: virtual address pointer to dt blob diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index add6ea616843..0f9856a2afa4 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -190,11 +190,6 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) memblock_add(base, size); } -void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) -{ - return __va(memblock_alloc(size, align)); -} - /* * Limit the memory size that was specified via FDT. */ diff --git a/arch/c6x/kernel/devicetree.c b/arch/c6x/kernel/devicetree.c index 287d0e64dfba..9e15ab9199b2 100644 --- a/arch/c6x/kernel/devicetree.c +++ b/arch/c6x/kernel/devicetree.c @@ -45,8 +45,3 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) { c6x_add_memory(base, size); } - -void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) -{ - return __va(memblock_alloc(size, align)); -} diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c index 62e2e8f2c5d6..0c4453f134cb 100644 --- a/arch/microblaze/kernel/prom.c +++ b/arch/microblaze/kernel/prom.c @@ -46,11 +46,6 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) memblock_add(base, size); } -void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) -{ - return __va(memblock_alloc(size, align)); -} - #ifdef CONFIG_EARLY_PRINTK static char *stdout; diff --git a/arch/openrisc/kernel/prom.c b/arch/openrisc/kernel/prom.c index 150215a91711..a63e76872f84 100644 --- a/arch/openrisc/kernel/prom.c +++ b/arch/openrisc/kernel/prom.c @@ -55,11 +55,6 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) memblock_add(base, size); } -void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) -{ - return __va(memblock_alloc(size, align)); -} - void __init early_init_devtree(void *params) { void *alloc; diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 67d18dad4368..3fa349efc4a6 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -544,11 +544,6 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) memblock_add(base, size); } -void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) -{ - return __va(memblock_alloc(size, align)); -} - #ifdef CONFIG_BLK_DEV_INITRD void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index b9657e5304ed..d49b3e8159bb 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -11,6 +11,7 @@ #include #include +#include #include #include #include @@ -700,6 +701,17 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname, return 1; } +#ifdef CONFIG_HAVE_MEMBLOCK +/* + * called from unflatten_device_tree() to bootstrap devicetree itself + * Architectures can override this definition if memblock isn't used + */ +void * __init __weak early_init_dt_alloc_memory_arch(u64 size, u64 align) +{ + return __va(memblock_alloc(size, align)); +} +#endif + /** * unflatten_device_tree - create tree of device_nodes from flat blob * -- cgit v1.2.3