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MIPS: ath79: Read the initrd address from the firmware environment

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Allow loading an initrd passed by the firmware.

Signed-off-by: Alban Bedel <albeu@free.fr>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8354/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Alban Bedel
2014-11-07 12:44:36 +01:00
committed by Ralf Baechle
parent 11a0f40bc9
commit ebf71ec7e1
1 changed files with 8 additions and 0 deletions
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8
arch/mips/ath79/prom.c
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@@ -13,6 +13,7 @@
#include <linux/init.h> #include <linux/init.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/string.h> #include <linux/string.h>
#include <linux/initrd.h>
#include <asm/bootinfo.h> #include <asm/bootinfo.h>
#include <asm/addrspace.h> #include <asm/addrspace.h>
@@ -23,6 +24,13 @@
void __init prom_init(void) void __init prom_init(void)
{ {
fw_init_cmdline(); fw_init_cmdline();
/* Read the initrd address from the firmware environment */
initrd_start = fw_getenvl("initrd_start");
if (initrd_start) {
initrd_start = KSEG0ADDR(initrd_start);
initrd_end = initrd_start + fw_getenvl("initrd_size");
}
} }
void __init prom_free_prom_memory(void) void __init prom_free_prom_memory(void)