MIPS: bcm47xx: enable ZBOOT support

Enable ZBOOT support. The WRT54GL router's bootloader limits kernel
size to 3 MB with the normal load address, which is a bit challenging
vmlinux size with modern Linux. A compressed kernel allows booting
much bigger kernels.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/18492/
Signed-off-by: James Hogan <jhogan@kernel.org>

2 files changed, 2 insertions, 0 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 883db58fe8fe..f83f51fc2f82 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -253,6 +253,7 @@ config BCM47XX
         select SYS_SUPPORTS_32BIT_KERNEL
         select SYS_SUPPORTS_LITTLE_ENDIAN
         select SYS_SUPPORTS_MIPS16
+        select SYS_SUPPORTS_ZBOOT
         select SYS_HAS_EARLY_PRINTK
         select USE_GENERIC_EARLY_PRINTK_8250
         select GPIOLIB
diff --git a/arch/mips/bcm47xx/Platform b/arch/mips/bcm47xx/Platform
index 874b7ca4cd11..70783b75fd9d 100644
--- a/arch/mips/bcm47xx/Platform
+++ b/arch/mips/bcm47xx/Platform
@@ -5,3 +5,4 @@ platform-$(CONFIG_BCM47XX)	+= bcm47xx/
 cflags-$(CONFIG_BCM47XX)        +=                                      \
                 -I$(srctree)/arch/mips/include/asm/mach-bcm47xx
 load-$(CONFIG_BCM47XX)          := 0xffffffff80001000
+zload-$(CONFIG_BCM47XX)         += 0xffffffff80400000