diff options
author | Peter Maydell <peter.maydell@linaro.org> | 2012-07-12 22:57:35 (GMT) |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-07-29 21:19:14 (GMT) |
commit | a5d5f7daa744b34477c4a12728bde0a1694a1707 (patch) | |
tree | 386299b6bedc567d937d2d8a35a3ae618ec22a60 | |
parent | ff081e05bfba3461119cd280201d163b6858eda2 (diff) | |
download | linux-fsl-qoriq-a5d5f7daa744b34477c4a12728bde0a1694a1707.tar.xz |
ARM: 7465/1: Handle >4GB memory sizes in device tree and mem=size@start option
The memory regions which are passed to arm_add_memory() from
device tree blobs via early_init_dt_add_memory_arch() can
have sizes which are larger than will fit in a 32 bit integer,
so switch to using a phys_addr_t to hold them, to avoid
silently dropping the top 32 bits of the size. Similarly, use
phys_addr_t in early_mem() so that mem=size@start command line
options specifying more than 4GB behave sensibly.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r-- | arch/arm/include/asm/setup.h | 4 | ||||
-rw-r--r-- | arch/arm/kernel/setup.c | 6 |
2 files changed, 5 insertions, 5 deletions
diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h index 23ebc0c..24d284a 100644 --- a/arch/arm/include/asm/setup.h +++ b/arch/arm/include/asm/setup.h @@ -196,7 +196,7 @@ static const struct tagtable __tagtable_##fn __tag = { tag, fn } struct membank { phys_addr_t start; - unsigned long size; + phys_addr_t size; unsigned int highmem; }; @@ -217,7 +217,7 @@ extern struct meminfo meminfo; #define bank_phys_end(bank) ((bank)->start + (bank)->size) #define bank_phys_size(bank) (bank)->size -extern int arm_add_memory(phys_addr_t start, unsigned long size); +extern int arm_add_memory(phys_addr_t start, phys_addr_t size); extern void early_print(const char *str, ...); extern void dump_machine_table(void); diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index e15d83b..a81dcec 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -508,7 +508,7 @@ void __init dump_machine_table(void) /* can't use cpu_relax() here as it may require MMU setup */; } -int __init arm_add_memory(phys_addr_t start, unsigned long size) +int __init arm_add_memory(phys_addr_t start, phys_addr_t size) { struct membank *bank = &meminfo.bank[meminfo.nr_banks]; @@ -538,7 +538,7 @@ int __init arm_add_memory(phys_addr_t start, unsigned long size) } #endif - bank->size = size & PAGE_MASK; + bank->size = size & ~(phys_addr_t)(PAGE_SIZE - 1); /* * Check whether this memory region has non-zero size or @@ -558,7 +558,7 @@ int __init arm_add_memory(phys_addr_t start, unsigned long size) static int __init early_mem(char *p) { static int usermem __initdata = 0; - unsigned long size; + phys_addr_t size; phys_addr_t start; char *endp; |