Make a one line replacement for SLOF. This bootloader just
jumps to 0x400000, because we know the kernel will be there.
Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
Tested-by: Laurent Vivier <lvivier@xxxxxxxxxx>
---
powerpc/.gitignore | 1 +
powerpc/Makefile.common | 11 +++++++++--
powerpc/boot_rom.S | 5 +++++
3 files changed, 15 insertions(+), 2 deletions(-)
create mode 100644 powerpc/.gitignore
create mode 100644 powerpc/boot_rom.S
diff --git a/powerpc/.gitignore b/powerpc/.gitignore
new file mode 100644
index 0000000000000..2f017a8e61d4b
--- /dev/null
+++ b/powerpc/.gitignore
@@ -0,0 +1 @@
+boot_rom.bin
diff --git a/powerpc/Makefile.common b/powerpc/Makefile.common
index 13b828ab171d6..0c3eaba0d3aab 100644
--- a/powerpc/Makefile.common
+++ b/powerpc/Makefile.common
@@ -11,7 +11,7 @@ endif
tests-common = \
$(TEST_DIR)/selftest.elf
-all: test_cases
+all: $(TEST_DIR)/boot_rom.bin test_cases
##################################################################
phys_base = $(LOADADDR)
@@ -40,8 +40,15 @@ FLATLIBS = $(libcflat) $(LIBFDT_archive) $(libgcc)
-Wl,-T,powerpc/flat.lds,--build-id=none,-Ttext=$(start_addr) \
$(filter %.o, $^) $(FLATLIBS)
+$(TEST_DIR)/boot_rom.bin: $(TEST_DIR)/boot_rom.elf
+ dd if=/dev/zero of=$@ bs=256 count=1
+ $(OBJCOPY) -O binary $^ >(cat - >>$@)
+
+$(TEST_DIR)/boot_rom.elf: $(TEST_DIR)/boot_rom.o
+ $(LD) -nostdlib -Ttext=0x100 --entry=start --build-id=none -o $@ $<
+
powerpc_clean: libfdt_clean asm_offsets_clean
- $(RM) $(TEST_DIR)/*.{o,elf} \
+ $(RM) $(TEST_DIR)/*.{o,elf} $(TEST_DIR)/boot_rom.bin \
$(TEST_DIR)/.*.d lib/powerpc/.*.d
##################################################################
diff --git a/powerpc/boot_rom.S b/powerpc/boot_rom.S
new file mode 100644
index 0000000000000..ae2c08ddce3c1
--- /dev/null
+++ b/powerpc/boot_rom.S
@@ -0,0 +1,5 @@
+#define SPAPR_KERNEL_LOAD_ADDR 0x400000
+.text
+.globl start
+start:
+ b SPAPR_KERNEL_LOAD_ADDR - 0x100
--
2.4.3
--
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