From fe3d72858c34a464976c6f8076971e2862d5c3b8 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 28 Nov 2005 13:15:08 +0000
Subject: [PATCH] [MIPS] Qemu: Accept kernel command line passed by the
 Emulator.

From Daniel Jacobowitz <dan@debian.org>.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 arch/mips/qemu/q-firmware.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/arch/mips/qemu/q-firmware.c b/arch/mips/qemu/q-firmware.c
index 5980f02b..fb2a8673 100644
--- a/arch/mips/qemu/q-firmware.c
+++ b/arch/mips/qemu/q-firmware.c
@@ -1,7 +1,18 @@
 #include <linux/init.h>
+#include <linux/string.h>
+#include <asm/addrspace.h>
 #include <asm/bootinfo.h>
 
 void __init prom_init(void)
 {
-	add_memory_region(0x0<<20, 0x10<<20, BOOT_MEM_RAM);
+	int *cmdline;
+
+	cmdline = (int *) (CKSEG0 + (0x10 << 20) - 260);
+	if (*cmdline == 0x12345678) {
+		if (*(char *)(cmdline + 1))
+			strcpy (arcs_cmdline, (char *)(cmdline + 1));
+		add_memory_region(0x0<<20, cmdline[-1], BOOT_MEM_RAM);
+	} else {
+		add_memory_region(0x0<<20, 0x10<<20, BOOT_MEM_RAM);
+	}
 }
-- 
2.7.4