[PATCH] mips: add support for Qemu system architecture

Add support for the virtual MIPS system that is emulated by Qemu.  See
http://www.linux-mips.org/wiki/Qemu for a detailed current status.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/mips/Kconfig

@@ -445,6 +445,24 @@ config DDB5477_BUS_FREQUENCY
 	depends on DDB5477
 	default 0
 
+config QEMU
+	bool "Support for Qemu"
+	select DMA_COHERENT
+	select GENERIC_ISA_DMA
+	select HAVE_STD_PC_SERIAL_PORT
+	select I8259
+	select ISA
+	select SWAP_IO_SPACE
+	select SYS_SUPPORTS_32BIT_KERNEL
+	select SYS_SUPPORTS_BIG_ENDIAN
+	help
+	 Qemu is a software emulator which among other architectures also
+	 can simulate a MIPS32 4Kc system.  This patch adds support for the
+	 system architecture that currently is being simulated by Qemu.  It
+	 will eventually be removed again when Qemu has the capability to
+	 simulate actual MIPS hardware platforms.  More information on Qemu
+	 can be found at http://www.linux-mips.org/wiki/Qemu.
+
 config SGI_IP22
 	bool "Support for SGI IP22 (Indy/Indigo2)"
 	select ARC

arch/mips/Makefile

@@ -423,6 +423,12 @@ core-$(CONFIG_PMC_YOSEMITE)	+= arch/mips/pmc-sierra/yosemite/
 cflags-$(CONFIG_PMC_YOSEMITE)	+= -Iinclude/asm-mips/mach-yosemite
 load-$(CONFIG_PMC_YOSEMITE)	+= 0xffffffff80100000
 
+# Qemu simulating MIPS32 4Kc
+#
+core-$(CONFIG_QEMU)		+= arch/mips/qemu/
+cflags-$(CONFIG_QEMU)		+= -Iinclude/asm-mips/mach-qemu
+load-$(CONFIG_QEMU)		+= 0xffffffff80010000
+
 #
 # Momentum Ocelot-3
 #