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Diffstat (limited to 'drivers/base/firmware_loader/builtin/Makefile')
-rw-r--r--drivers/base/firmware_loader/builtin/Makefile42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/base/firmware_loader/builtin/Makefile b/drivers/base/firmware_loader/builtin/Makefile
new file mode 100644
index 000000000..6c067dedc
--- /dev/null
+++ b/drivers/base/firmware_loader/builtin/Makefile
@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-y += main.o
+
+# Create $(fwdir) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
+# leading /, it's relative to $(srctree).
+fwdir := $(CONFIG_EXTRA_FIRMWARE_DIR)
+fwdir := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
+
+firmware := $(addsuffix .gen.o, $(CONFIG_EXTRA_FIRMWARE))
+obj-y += $(firmware)
+
+FWNAME = $(patsubst $(obj)/%.gen.S,%,$@)
+FWSTR = $(subst $(comma),_,$(subst /,_,$(subst .,_,$(subst -,_,$(FWNAME)))))
+ASM_WORD = $(if $(CONFIG_64BIT),.quad,.long)
+ASM_ALIGN = $(if $(CONFIG_64BIT),3,2)
+PROGBITS = $(if $(CONFIG_ARM),%,@)progbits
+
+filechk_fwbin = \
+ echo "/* Generated by $(src)/Makefile */" ;\
+ echo " .section .rodata" ;\
+ echo " .p2align 4" ;\
+ echo "_fw_$(FWSTR)_bin:" ;\
+ echo " .incbin \"$(fwdir)/$(FWNAME)\"" ;\
+ echo "_fw_end:" ;\
+ echo " .section .rodata.str,\"aMS\",$(PROGBITS),1" ;\
+ echo " .p2align $(ASM_ALIGN)" ;\
+ echo "_fw_$(FWSTR)_name:" ;\
+ echo " .string \"$(FWNAME)\"" ;\
+ echo " .section .builtin_fw,\"a\",$(PROGBITS)" ;\
+ echo " .p2align $(ASM_ALIGN)" ;\
+ echo " $(ASM_WORD) _fw_$(FWSTR)_name" ;\
+ echo " $(ASM_WORD) _fw_$(FWSTR)_bin" ;\
+ echo " $(ASM_WORD) _fw_end - _fw_$(FWSTR)_bin"
+
+$(obj)/%.gen.S: FORCE
+ $(call filechk,fwbin)
+
+# The .o files depend on the binaries directly; the .S files don't.
+$(addprefix $(obj)/, $(firmware)): $(obj)/%.gen.o: $(fwdir)/%
+
+targets := $(patsubst $(obj)/%,%, \
+ $(shell find $(obj) -name \*.gen.S 2>/dev/null))