tkey: Add the signer firmware

Add a binary for the TKey signer, so that it can be downloaded to the
key when needed.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/misc/Makefile

@@ -6,6 +6,7 @@
 obj-$(CONFIG_$(PHASE_)MISC) += misc-uclass.o
 obj-$(CONFIG_$(PHASE_)NVMEM) += nvmem.o
 obj-$(CONFIG_TKEY) += tkey-uclass.o
+obj-$(CONFIG_TKEY) += signer-1.0.0.o
 
 obj-$(CONFIG_$(PHASE_)CROS_EC) += cros_ec.o
 obj-$(CONFIG_$(PHASE_)CROS_EC_SANDBOX) += cros_ec_sandbox.o

include/tkey.h

@@ -23,6 +23,11 @@ struct udevice;
 #define TKEY_DISK_KEY_SIZE		32
 #define TKEY_HASH_SIZE			32
 
+/* Embedded TKey signer binary */
+extern char __signer_1_0_0_begin[];
+extern char __signer_1_0_0_end[];
+#define TKEY_SIGNER_SIZE	(__signer_1_0_0_end - __signer_1_0_0_begin)
+
 /**
  * struct tkey_ops - The functions that a TKey driver must implement.
  *

scripts/Makefile.lib

@@ -502,6 +502,26 @@ cmd_S_ttf=						\
 $(obj)/%.S: $(src)/%.ttf
 	$(call cmd,S_ttf)
 
+# TKey signer binary
+# ---------------------------------------------------------------------------
+
+# Generate an assembly file to wrap the TKey signer binary
+quiet_cmd_S_signer= SIGNER  $@
+cmd_S_signer=						\
+(							\
+	echo '.section .rodata.signer.init,"a"';	\
+	echo '.balign 16';				\
+	echo '.global __signer_$(subst .,_,$(*F))_begin';		\
+	echo '__signer_$(subst .,_,$(*F))_begin:';			\
+	echo '.incbin "$<" ';				\
+	echo '__signer_$(subst .,_,$(*F))_end:';			\
+	echo '.global __signer_$(subst .,_,$(*F))_end';		\
+	echo '.balign 16';				\
+) > $@
+
+$(obj)/signer-%.S: $(src)/signer.bin-v%
+	$(call cmd,S_signer)
+
 # Splash logos
 # ---------------------------------------------------------------------------