Add initial bootloader skipping

Makefile

@@ -10,6 +10,7 @@ SRCS := \
   CH5xx_ble_firmware_library/RVMSIS/core_riscv.c \
   CH5xx_ble_firmware_library/Startup/startup_CH583.S \
   $(wildcard src/*.c) \
+  $(wildcard src/*.S) \
   $(wildcard src/*/*.c)
 
 
@@ -50,7 +51,7 @@ LDFLAGS = -march=rv32imac -mabi=ilp32 -msmall-data-limit=8 \
 	-lc -lm -lnosys \
 	./CH5xx_ble_firmware_library/StdPeriphDriver/libISP583.a \
 	./CH5xx_ble_firmware_library/BLE/LIBCH58xBLE.a \
-	-T CH5xx_ble_firmware_library/Ld/Link.ld -nostartfiles -Xlinker --gc-sections
+	-T link.ld -nostartfiles -Xlinker --gc-sections
 
 all: build/$(PLATFORM).bin
 

link.ld

@@ -0,0 +1,186 @@
+ENTRY( _bldr_start )
+
+MEMORY
+{
+	BLDRFLASH (rx) : ORIGIN = 0x00000000, LENGTH = 4K
+	FLASH (rx) : ORIGIN = 0x00001000, LENGTH = 444K
+	RAM (xrw) : ORIGIN = 0x20003800, LENGTH = 32K
+}
+
+
+SECTIONS
+{
+	.bldr_init :
+	{
+		. = ALIGN(4);
+		KEEP(*(SORT_NONE(.bldr_init)))
+		. = ALIGN(4);
+	} >BLDRFLASH AT>BLDRFLASH
+
+	.init :
+	{
+		_sinit = .;
+		. = ALIGN(4);
+		KEEP(*(SORT_NONE(.init)))
+		. = ALIGN(4);
+		_einit = .;
+	} >FLASH AT>FLASH
+	
+ /*   .vector :
+    {
+        *(.vector);
+    } >FLASH AT>FLASH */
+    
+    .highcodelalign : 
+    {       
+        . = ALIGN(4);
+        PROVIDE(_highcode_lma = .); 
+    } >FLASH AT>FLASH 
+    
+    .highcode : 
+    {
+        . = ALIGN(4);
+        PROVIDE(_highcode_vma_start = .);
+        *(.vector);
+		KEEP(*(SORT_NONE(.vector_handler)))
+        *(.highcode);
+        *(.highcode.*);
+		. = ALIGN(4); 
+        PROVIDE(_highcode_vma_end = .);
+    } >RAM AT>FLASH
+     
+	.text :
+	{
+		. = ALIGN(4);
+		KEEP(*(SORT_NONE(.handle_reset)))
+		*(.text)
+		*(.text.*)
+		*(.rodata)
+		*(.rodata*)
+  *(.sdata2.*)
+		*(.glue_7)
+		*(.glue_7t)
+		*(.gnu.linkonce.t.*)
+		. = ALIGN(4);
+	} >FLASH AT>FLASH 
+
+	.fini :
+	{
+		KEEP(*(SORT_NONE(.fini)))
+		. = ALIGN(4);
+	} >FLASH AT>FLASH
+
+	PROVIDE( _etext = . );
+	PROVIDE( _eitcm = . );	
+
+	.preinit_array  :
+	{
+	  PROVIDE_HIDDEN (__preinit_array_start = .);
+	  KEEP (*(.preinit_array))
+	  PROVIDE_HIDDEN (__preinit_array_end = .);
+	} >FLASH AT>FLASH 
+	
+	.init_array     :
+	{
+	  PROVIDE_HIDDEN (__init_array_start = .);
+	  KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
+	  KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
+	  PROVIDE_HIDDEN (__init_array_end = .);
+	} >FLASH AT>FLASH 
+	
+	.fini_array     :
+	{
+	  PROVIDE_HIDDEN (__fini_array_start = .);
+	  KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
+	  KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
+	  PROVIDE_HIDDEN (__fini_array_end = .);
+	} >FLASH AT>FLASH 
+	
+	.ctors          :
+	{
+	  /* gcc uses crtbegin.o to find the start of
+	     the constructors, so we make sure it is
+	     first.  Because this is a wildcard, it
+	     doesn't matter if the user does not
+	     actually link against crtbegin.o; the
+	     linker won't look for a file to match a
+	     wildcard.  The wildcard also means that it
+	     doesn't matter which directory crtbegin.o
+	     is in.  */
+	  KEEP (*crtbegin.o(.ctors))
+	  KEEP (*crtbegin?.o(.ctors))
+	  /* We don't want to include the .ctor section from
+	     the crtend.o file until after the sorted ctors.
+	     The .ctor section from the crtend file contains the
+	     end of ctors marker and it must be last */
+	  KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
+	  KEEP (*(SORT(.ctors.*)))
+	  KEEP (*(.ctors))
+	} >FLASH AT>FLASH 
+	
+	.dtors          :
+	{
+	  KEEP (*crtbegin.o(.dtors))
+	  KEEP (*crtbegin?.o(.dtors))
+	  KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
+	  KEEP (*(SORT(.dtors.*)))
+	  KEEP (*(.dtors))
+	} >FLASH AT>FLASH 
+
+	.dalign    : 
+	{
+		. = ORIGIN(RAM) + MAX(0x800 , SIZEOF(.highcode));
+	} >RAM AT>FLASH	
+
+	.dlalign :
+	{
+		. = ALIGN(4); 
+		PROVIDE(_data_lma = .);
+	} >FLASH AT>FLASH
+
+	.data :
+	{
+		. = ALIGN(4); 
+		PROVIDE(_data_vma = .);
+    	*(.gnu.linkonce.r.*)
+    	*(.data .data.*)
+    	*(.gnu.linkonce.d.*)
+		. = ALIGN(8);
+    	PROVIDE( __global_pointer$ = . + 0x800 );
+    	*(.sdata .sdata.*)
+    	*(.gnu.linkonce.s.*)
+    	. = ALIGN(8);
+    	*(.srodata.cst16)
+    	*(.srodata.cst8)
+    	*(.srodata.cst4)
+    	*(.srodata.cst2)
+    	*(.srodata .srodata.*)
+    	. = ALIGN(4);
+		PROVIDE( _edata = .);
+	} >RAM AT>FLASH
+
+	.bss :
+	{
+		. = ALIGN(4);
+		PROVIDE( _sbss = .);
+  	    *(.sbss*)
+        *(.gnu.linkonce.sb.*)
+		*(.bss*)
+     	*(.gnu.linkonce.b.*)		
+		*(COMMON*)
+		. = ALIGN(4);
+		PROVIDE( _ebss = .);
+	} >RAM AT>FLASH
+
+	PROVIDE( _end = _ebss);
+	PROVIDE( end = . );
+	
+	.stack ORIGIN(RAM)+LENGTH(RAM) :
+	{
+		. = ALIGN(4);
+		PROVIDE(_eusrstack = . );
+	} >RAM  
+}
+
+
+

src/bldr.S

@@ -0,0 +1,5 @@
+	.section .bldr_init,"ax",@progbits
+	.global _bldr_start
+	.align 1
+_bldr_start:
+	j handle_reset