feat(legacy): add model info to image header

legacy/Makefile.include

@@ -95,6 +95,13 @@ LDFLAGS  += -L$(TOP_DIR) \
 
 ZKP_PATH = $(TOP_DIR)vendor/secp256k1-zkp
 
+# hw_model = T1B1 = 0x31423154
+HW_MODEL = 0x31423154
+CPUFLAGS   += -DHW_MODEL=$(HW_MODEL)
+CPUFLAGS   += -DHW_REVISION=0
+CFLAGS   += -DHW_MODEL=$(HW_MODEL)
+CFLAGS   += -DHW_REVISION=0
+
 ifeq ($(EMULATOR),1)
 CFLAGS   += -DEMULATOR=1
 

legacy/firmware/header.S

@@ -20,7 +20,10 @@ g_header:
     .byte FIX_VERSION_MINOR          // fix_vminor
     .byte FIX_VERSION_PATCH          // fix_vpatch
     .byte 0                          // fix_vbuild
-    . = . + 8                        // reserved
+    .word HW_MODEL                   // type of the designated hardware
+    .byte HW_REVISION                // revision of the designated hardware
+    .byte 0                          // monotonic version placeholder - not used in legacy
+    . = . + 2                        // reserved
     . = . + 512                      // hash1 ... hash16
     . = . + 64                       // sig1
     . = . + 64                       // sig2

legacy/fw_signatures.h

@@ -44,7 +44,10 @@ typedef struct {
   uint32_t codelen;
   uint32_t version;
   uint32_t fix_version;
-  uint8_t __reserved1[8];
+  uint32_t hw_model;
+  uint8_t hw_revision;
+  uint8_t monotonic;
+  uint8_t __reserved1[2];
   uint8_t hashes[512];
   uint8_t sig1[64];
   uint8_t sig2[64];