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author | Alex Shi <alex.shi@linaro.org> | 2015-04-24 09:46:37 +0800 |
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committer | Alex Shi <alex.shi@linaro.org> | 2015-04-24 09:46:37 +0800 |
commit | 131b3aa7c04250554e4d303bc90f798bf21423dd (patch) | |
tree | 732593e651d4b4b30702e762129d7866ba961e14 /arch/arm64/mm/init.c | |
parent | 1354004c0e6b966cbaa6298cd3787ca2609ac2cc (diff) | |
parent | 1dcd9896384ec3fe5c75829701d9babec7fe0d25 (diff) |
Merge branch 'linux-linaro-lsk-v3.14' into linux-linaro-lsk-v3.14-rtlsk-v3.14-15.05-rtlsk-v3.14-15.04-rt
Diffstat (limited to 'arch/arm64/mm/init.c')
-rw-r--r-- | arch/arm64/mm/init.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index cc3339d0a276..2d8f884d7f92 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -124,10 +124,29 @@ static void arm64_memory_present(void) } #endif +static phys_addr_t memory_limit = (phys_addr_t)ULLONG_MAX; + +/* + * Limit the memory size that was specified via FDT. + */ +static int __init early_mem(char *p) +{ + if (!p) + return 1; + + memory_limit = memparse(p, &p) & PAGE_MASK; + pr_notice("Memory limited to %lldMB\n", memory_limit >> 20); + + return 0; +} +early_param("mem", early_mem); + void __init arm64_memblock_init(void) { u64 *reserve_map, base, size; + memblock_enforce_memory_limit(memory_limit); + /* * Register the kernel text, kernel data, initrd, and initial * pagetables with memblock. |