Intel has invented yet another binary blob which firmware is required to run. This is run after SDRAM is ready. It is linked to load at a particular address, typically 0, but is a relocatable ELF so can be moved if required.
Add support for this in the build system. The file should be placed in the board directory, and called refcode.elf.
Signed-off-by: Simon Glass sjg@chromium.org ---
Makefile | 14 +++++++++++++- arch/x86/Kconfig | 11 +++++++++++ arch/x86/include/asm/cpu.h | 12 ++++++++++++ 3 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile index 6bb5565..76dab6f 100644 --- a/Makefile +++ b/Makefile @@ -1044,6 +1044,10 @@ ifneq ($(CONFIG_HAVE_VGA_BIOS),) IFDTOOL_FLAGS += -w $(CONFIG_VGA_BIOS_ADDR):$(srctree)/board/$(BOARDDIR)/$(CONFIG_VGA_BIOS_FILE) endif
+ifneq ($(CONFIG_HAVE_REFCODE),) +IFDTOOL_FLAGS += -w $(CONFIG_X86_REFCODE_ADDR):refcode.bin +endif + quiet_cmd_ifdtool = IFDTOOL $@ cmd_ifdtool = $(IFDTOOL) -c -r $(CONFIG_ROM_SIZE) u-boot.tmp; ifneq ($(CONFIG_HAVE_INTEL_ME),) @@ -1052,7 +1056,15 @@ endif cmd_ifdtool += $(IFDTOOL) $(IFDTOOL_FLAGS) u-boot.tmp; cmd_ifdtool += mv u-boot.tmp $@
-u-boot.rom: u-boot-x86-16bit.bin u-boot.bin FORCE +refcode.bin: $(srctree)/board/$(BOARDDIR)/refcode.bin FORCE + $(call if_changed,copy) + +quiet_cmd_ldr = LD $@ +cmd_ldr = $(LD) $(LDFLAGS_$(@F)) \ + $(filter-out FORCE,$^) -o $@ + +u-boot.rom: u-boot-x86-16bit.bin u-boot.bin FORCE \ + $(if $(CONFIG_HAVE_REFCODE),refcode.bin) $(call if_changed,ifdtool)
OBJCOPYFLAGS_u-boot-x86-16bit.bin := -O binary -j .start16 -j .resetvec diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 29df78c..2544c65 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -305,6 +305,17 @@ config DCACHE_RAM_MRC_VAR_SIZE memory reference code and must be set correctly or the board will not boot.
+config HAVE_REFCODE + bool "Add a Reference Code binary" + help + Select this option to add a Reference Code binary to the resulting + U-Boot image. This is an Intel binary blob that handles system + initialisation, in this case the PCH and System Agent. + + Note: Without this binary (on platforms that need it such as + broadwell) U-Boot will be missing some critical setup steps. + Various peripherals may fail to work. + config SMP bool "Enable Symmetric Multiprocessing" default n diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h index 85386da..23ec764 100644 --- a/arch/x86/include/asm/cpu.h +++ b/arch/x86/include/asm/cpu.h @@ -275,4 +275,16 @@ u32 cpu_get_family_model(void); */ u32 cpu_get_stepping(void);
+/** + * cpu_run_reference_code() - Run the platform reference code + * + * Some platforms require a binary blob to be executed once SDRAM is + * available. This is used to set up various platform features, such as the + * platform controller hub (PCB). This function should be implemented by the + * CPU-specific code. + * + * @return 0 on success, -ve on failure + */ +int cpu_run_reference_code(void); + #endif