MIPS: Enable vmlinuz for JZ4740

This patch adds support for building a compressed kernel for the JZ4740
architecture.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Cc: Sergei Shtylyov <sshtylyov@mvista.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3563/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

3 files changed, 10 insertions, 0 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index b3e10fdd3898..debdb6e83409 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -209,6 +209,7 @@ config MACH_JZ4740
         select SYS_HAS_CPU_MIPS32_R1
         select SYS_SUPPORTS_32BIT_KERNEL
         select SYS_SUPPORTS_LITTLE_ENDIAN
+        select SYS_SUPPORTS_ZBOOT_UART16550
         select DMA_NONCOHERENT
         select IRQ_CPU
         select GENERIC_GPIO
diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile
index 5042d51b0512..c2a3fb0ffc87 100644
--- a/arch/mips/boot/compressed/Makefile
+++ b/arch/mips/boot/compressed/Makefile
@@ -58,8 +58,12 @@ $(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE
 # Calculate the load address of the compressed kernel image
 hostprogs-y := calc_vmlinuz_load_addr
 
+ifeq ($(CONFIG_MACH_JZ4740),y)
+VMLINUZ_LOAD_ADDRESS := 0x80600000
+else
 VMLINUZ_LOAD_ADDRESS = $(shell $(obj)/calc_vmlinuz_load_addr \
                 $(obj)/vmlinux.bin $(VMLINUX_LOAD_ADDRESS))
+endif
 
 vmlinuzobjs-y += $(obj)/piggy.o
 
diff --git a/arch/mips/boot/compressed/uart-16550.c b/arch/mips/boot/compressed/uart-16550.c
index c9caaf4fbf60..1c7b739b6a1d 100644
--- a/arch/mips/boot/compressed/uart-16550.c
+++ b/arch/mips/boot/compressed/uart-16550.c
@@ -18,6 +18,11 @@
 #define PORT(offset) (CKSEG1ADDR(AR7_REGS_UART0) + (4 * offset))
 #endif
 
+#ifdef CONFIG_MACH_JZ4740
+#define UART0_BASE  0xB0030000
+#define PORT(offset) (UART0_BASE + (4 * offset))
+#endif
+
 #ifndef PORT
 #error please define the serial port address for your own machine
 #endif