Refine flashcode FMC and bootloader linker script selection

Adds conditional linker script selection for several GD32 MCUs when CONFIG_REMOTECONFIG_MINIMUM is set, using MAKE_FLAGS/DEFINES as the source for flag detection. Refactors GD32 FMC flashcode state handling with clearer state names and bank helper functions (lock/unlock/busy/program/erase), adds read/write address and size guards plus alignment assertions, and switches FMC logging to dedicated debug macros. Also fixes H7xx erase-state typo (kEraseProgram), makes write data pointer const-correct, and updates minor debug/copyright details.

Author: vanvught

common/make/gd32/Mcu.mk

@@ -4,6 +4,11 @@ ifndef MCU
 	$(error MCU is not set)
 endif
 
+FLAGS:=$(MAKE_FLAGS)
+ifeq ($(FLAGS),)
+	FLAGS:=$(DEFINES)
+endif
+
 $(info $$MCU [${MCU}])
 
 # Extract upper and lower case versions of MCU name
@@ -24,20 +29,32 @@ ifeq ($(strip $(MCU)),GD32F103RC)
 endif
 
 ifeq ($(strip $(MCU)),GD32F107RC)
-	LINKER=$(FIRMWARE_DIR)gd32f107rc_flash.ld
+	ifeq ($(findstring CONFIG_REMOTECONFIG_MINIMUM,$(FLAGS)),CONFIG_REMOTECONFIG_MINIMUM)
+  	LINKER=$(FIRMWARE_DIR)gd32f107rc-bootloader_flash.ld
+  else
+		LINKER=$(FIRMWARE_DIR)gd32f107rc_flash.ld
+	endif
 	FAMILY=gd32f10x
 	LINE=gd32f10x_cl
 	TARGET=gd32f107.bin
 endif
 
 ifeq ($(strip $(MCU)),GD32F207VC)
-	LINKER=$(FIRMWARE_DIR)gd32f207vc_flash.ld
+	ifeq ($(findstring CONFIG_REMOTECONFIG_MINIMUM,$(FLAGS)),CONFIG_REMOTECONFIG_MINIMUM)
+  	LINKER=$(FIRMWARE_DIR)gd32f207vc-bootloader_flash.ld
+  else
+		LINKER=$(FIRMWARE_DIR)gd32f207vc_flash.ld
+	endif
 	FAMILY=gd32f20x
 	LINE=gd32f20x_cl
 endif
 
 ifeq ($(strip $(MCU)),GD32F207RG)
-	LINKER=$(FIRMWARE_DIR)gd32f207rg_flash.ld
+	ifeq ($(findstring CONFIG_REMOTECONFIG_MINIMUM,$(FLAGS)),CONFIG_REMOTECONFIG_MINIMUM)
+  	LINKER=$(FIRMWARE_DIR)gd32f207rg-bootloader_flash.ld
+  else
+  	LINKER=$(FIRMWARE_DIR)gd32f207rg_flash.ld
+  endif
 	FAMILY=gd32f20x
 	LINE=gd32f20x_cl
 endif
@@ -50,7 +67,11 @@ ifeq ($(strip $(MCU)),GD32F303RC)
 endif
 
 ifeq ($(strip $(MCU)),GD32F407RE) 
-  LINKER=$(FIRMWARE_DIR)gd32f407re_flash.ld
+	ifeq ($(findstring CONFIG_REMOTECONFIG_MINIMUM,$(FLAGS)),CONFIG_REMOTECONFIG_MINIMUM)
+  	LINKER=$(FIRMWARE_DIR)gd32f407re-bootloader_flash.ld
+  else
+		LINKER=$(FIRMWARE_DIR)gd32f407re_flash.ld
+  endif
   FAMILY=gd32f4xx
   LINE=gd32f407
 endif

lib-flashcode/include/flashcode.h

@@ -29,6 +29,8 @@
 #include <cstdint>
 #include <span>
 
+#include "firmware/debug/debug_debug.h"
+
 #ifdef DEBUG_FLASHCODE
 #define FLASHCODE_DEBUG_ENTRY() DEBUG_ENTRY()
 #define FLASHCODE_DEBUG_EXIT() DEBUG_EXIT()
@@ -49,6 +51,26 @@
     } while (false)
 #endif
 
+#ifdef DEBUG_FMC
+#define FMC_DEBUG_ENTRY() DEBUG_ENTRY()
+#define FMC_DEBUG_EXIT() DEBUG_EXIT()
+#define FMC_DEBUG_PRINTF(...) DEBUG_PRINTF(__VA_ARGS__)
+#define FMC_DEBUG_PUTS(...) DEBUG_PUTS(__VA_ARGS__)
+#else
+#define FMC_DEBUG_ENTRY() \
+    do {                  \
+    } while (false)
+#define FMC_DEBUG_EXIT() \
+    do {                 \
+    } while (false)
+#define FMC_DEBUG_PRINTF(...) \
+    do {                      \
+    } while (false)
+#define FMC_DEBUG_PUTS(...) \
+    do {                    \
+    } while (false)
+#endif // DEBUG_COMMON_FMC
+
 namespace flashcode {
 enum class Result { kOk, kError };
 } // namespace flashcode