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Re: [Qemu-devel] [PATCH 8/9] PPC: Add u-boot firmware for e500

From: Alexander Graf
Subject: Re: [Qemu-devel] [PATCH 8/9] PPC: Add u-boot firmware for e500
Date: Fri, 16 May 2014 13:09:23 +0200
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

On 16.05.14 08:06, Gerd Hoffmann wrote:
On Do, 2014-05-15 at 18:32 +0200, Alexander Graf wrote:
This adds a special build of u-boot tailored for the e500 platforms we
emulate. It is based on the current version of upstream u-boot which
contains all the code necessary to drive our QEMU provided machines.

Signed-off-by: Alexander Graf <address@hidden>
Adding build rules to roms/Makefile would be nice,
so you can just do "make -C roms uboot" to build it.

Good idea. How about something like this? I had to jump through some hoops to make it work with a biarch 64/32 compiler because upstream u-boot assumes you always have a cross compiler for a specific target architecture which is not the case in normal enterprise distributions.

If you think this approach is fine (I do ;)), then I'll squash it into this patch but won't resend the patch - I don't want to clutter people's inboxes with random binary blobs.


diff --git a/roms/Makefile b/roms/Makefile
index 2721b02..1b6996c 100644
--- a/roms/Makefile
+++ b/roms/Makefile
@@ -55,6 +55,7 @@ default:
     @echo "  efirom         -- update nic roms (bios+efi, this needs"
     @echo "                    the EfiRom utility from edk2 / tianocore)"
     @echo "  slof           -- update slof.bin"
+    @echo "  u-boot.e500    -- update u-boot.e500"

 bios: build-seabios-config-seabios-128k build-seabios-config-seabios-256k
     cp seabios/builds/seabios-128k/bios.bin ../pc-bios/bios.bin
@@ -132,6 +133,19 @@ slof:
     $(MAKE) -C SLOF CROSS=$(powerpc64_cross_prefix) qemu
     cp SLOF/boot_rom.bin ../pc-bios/slof.bin

+    # examples fail to honor cflags, just remove them
+    rm -rf u-boot/examples
+    sed -i 's/examples//g' u-boot/Makefile
+    # Make linker script biarch aware
+    sed -i 's/OUTPUT_ARCH(powerpc)/OUTPUT_ARCH(powerpc:common)/' \
+        u-boot/arch/powerpc/cpu/mpc85xx/u-boot.lds
+    # Compile u-boot
+    $(MAKE) -C u-boot O=build.e500 qemu-ppce500_config
+    $(MAKE) -C u-boot CROSS_COMPILE=$(powerpc64_cross_prefix) \
+        O=build.e500 KCFLAGS=-m32 KAFLAGS=-m32 \
+        LDFLAGS=-melf32ppc KCPPFLAGS=-m32 V=1 u-boot.bin
+    strip u-boot/build.e500/u-boot -o ../pc-bios/u-boot.e500

     rm -rf seabios/.config seabios/out seabios/builds
@@ -141,3 +155,4 @@ clean:
     rm -f sgabios/.depend
     $(MAKE) -C ipxe/src veryclean
     $(MAKE) -C SLOF clean
+    rm -rf u-boot/build.e500

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