diff options
| author | Noam Camus <noamc@ezchip.com> | 2012-09-09 11:37:40 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2014-03-26 14:31:27 +0530 |
| commit | d6579e99bc448a351279cea7469ab64a00d25ff8 (patch) | |
| tree | 784445b9378b16692bf4c9657629d36ae5678493 /arch/arc | |
| parent | 80c1fe4c0d2747c419a4290c7028c8776932164c (diff) | |
ARC: support external initrd
Currently ARC only supports embedded initrd. This patch enables
external ones too.
[vgupta: Changed from "rt_start"=start/"rd_size"=sz to unified "initrd"=start,sz]
Signed-off-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/mm/init.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index 55e0a85bea78..523412369f70 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -10,6 +10,9 @@ #include <linux/mm.h> #include <linux/bootmem.h> #include <linux/memblock.h> +#ifdef CONFIG_BLK_DEV_INITRD +#include <linux/initrd.h> +#endif #include <linux/swap.h> #include <linux/module.h> #include <asm/page.h> @@ -42,6 +45,24 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) pr_info("Memory size set via devicetree %ldM\n", TO_MB(arc_mem_sz)); } +#ifdef CONFIG_BLK_DEV_INITRD +static int __init early_initrd(char *p) +{ + unsigned long start, size; + char *endp; + + start = memparse(p, &endp); + if (*endp == ',') { + size = memparse(endp + 1, NULL); + + initrd_start = (unsigned long)__va(start); + initrd_end = (unsigned long)__va(start + size); + } + return 0; +} +early_param("initrd", early_initrd); +#endif + /* * First memory setup routine called from setup_arch() * 1. setup swapper's mm @init_mm @@ -80,6 +101,12 @@ void __init setup_arch_memory(void) memblock_reserve(CONFIG_LINUX_LINK_BASE, __pa(_end) - CONFIG_LINUX_LINK_BASE); +#ifdef CONFIG_BLK_DEV_INITRD + /*------------- reserve initrd image -----------------------*/ + if (initrd_start) + memblock_reserve(__pa(initrd_start), initrd_end - initrd_start); +#endif + memblock_dump_all(); /*-------------- node setup --------------------------------*/ |