[RFC PATCH 15/18] powerpc/boot: add a global entry point for pseries

[Cédric Le Goater]

When entering the boot wrapper in little endian, we will need to fix
the endian order using a fixup trampoline like in the kernel. This
patch overrides the _zimage_start entry point for this purpose.

Signed-off-by: Cédric Le Goater <clg at fr.ibm.com>
---
 arch/powerpc/boot/Makefile       |    2 ++
 arch/powerpc/boot/pseries-head.S |    5 +++++
 arch/powerpc/boot/wrapper        |    2 +-
 3 files changed, 8 insertions(+), 1 deletion(-)
 create mode 100644 arch/powerpc/boot/pseries-head.S

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index ca7f08cc4afd..4c4ec163a7a1 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -99,6 +99,8 @@ src-plat-$(CONFIG_EMBEDDED6xx) += cuboot-pq2.c cuboot-mpc7448hpc2.c \
 src-plat-$(CONFIG_AMIGAONE) += cuboot-amigaone.c
 src-plat-$(CONFIG_PPC_PS3) += ps3-head.S ps3-hvcall.S ps3.c
 src-plat-$(CONFIG_EPAPR_BOOT) += epapr.c epapr-wrapper.c
+src-plat-$(CONFIG_PPC_PSERIES) += pseries-head.S
+
 
 src-wlib := $(sort $(src-wlib-y))
 src-plat := $(sort $(src-plat-y))
diff --git a/arch/powerpc/boot/pseries-head.S b/arch/powerpc/boot/pseries-head.S
new file mode 100644
index 000000000000..655c3d2c321b
--- /dev/null
+++ b/arch/powerpc/boot/pseries-head.S
@@ -0,0 +1,5 @@
+	.text
+
+	.globl _zimage_start
+_zimage_start:
+	b _zimage_start_lib
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index 2e1af74a64be..cd0101f1d457 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -152,7 +152,7 @@ of)
     make_space=n
     ;;
 pseries)
-    platformo="$object/of.o $object/epapr.o"
+    platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
     link_address='0x4000000'
     make_space=n
     ;;
-- 
1.7.10.4