diff options
Diffstat (limited to 'src/cpu/Makefile.inc')
| -rw-r--r-- | src/cpu/Makefile.inc | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/cpu/Makefile.inc b/src/cpu/Makefile.inc index 57273cf8c3..938a8dfef1 100644 --- a/src/cpu/Makefile.inc +++ b/src/cpu/Makefile.inc @@ -1,3 +1,40 @@ +################################################################################ +## Subdirectories +################################################################################ subdirs-y += amd subdirs-y += intel subdirs-y += via + +################################################################################ +## Rules for building the microcode blob in CBFS +################################################################################ + +ifneq ($(CONFIG_CPU_MICROCODE_CBFS_NONE), y) + +cbfs-files-y += cpu_microcode_blob.bin + +cpu_microcode_blob.bin-type = 0x53 + +# External microcode file, or are we generating one ? +ifeq ($(CONFIG_CPU_MICROCODE_CBFS_EXTERNAL), y) +cpu_microcode_blob.bin-file = $(call strip_quotes,$(CONFIG_CPU_MICROCODE_FILE)) +else +cpu_microcode_blob.bin-file = $(obj)/cpu_microcode_blob.bin +endif + +# In case we have more than one "source" (cough) files containing microcode, we +# Link them together in one large blob, so that we get all the microcode updates +# in one file. This makes it easier for objcopy in the final step. +# The --entry=0 is just here to suppress the LD warning. It does not affect the +# final microcode file. +$(obj)/cpu_microcode_blob.o: $$(cpu_microcode-objs) + @printf " LD $(subst $(obj)/,,$(@))\n" + $(LD) -static --entry=0 $< -o $@ + +# We have a lot of useless data in the large blob, and we are only interested in +# the data section, so we only copy that part to the final microcode file +$(obj)/cpu_microcode_blob.bin: $(obj)/cpu_microcode_blob.o + @printf " MICROCODE $(subst $(obj)/,,$(@))\n" + $(OBJCOPY) -j .data -O binary $< $@ + +endif |