Completely separate DFU from application program, we now have a real bootloader.

DFU occupies 0x00100000 - 0x00100fff in flash, application starts at 0x00101000.
DFU also occupies the first couple of bytes in SRAM, application starts at 0x00200024.

In order to produce a samba-flashable image, first build dfu.bin by typing 
'make -f Makefule.dfu', succeeded by 'make TARGET=... DEBUG=... BOARD=...' and then 
concatenating the two files together, e.g. cat dfu.bin main_reqa.bin > flash.bin.

Actual flashing via DFU is still not operational, but will be implemented next


git-svn-id: https://svn.openpcd.org:2342/trunk@194 6dc7ffe9-61d6-0310-9af1-9938baff3ed1

1 files changed, 94 insertions, 0 deletions

diff --git a/firmware/link/AT91SAM7S256-ROM-sam7dfu-app.ld b/firmware/link/AT91SAM7S256-ROM-sam7dfu-app.ld
new file mode 100644
index 0000000..32bd787
--- /dev/null
+++ b/firmware/link/AT91SAM7S256-ROM-sam7dfu-app.ld
@@ -0,0 +1,94 @@
+/* Memory Definitions */
+
+MEMORY
+{
+  FLASH (rx) : ORIGIN = 0x00101000, LENGTH = (0x00040000 - 0x1000)
+  DATA (rw)  : ORIGIN = 0x00200024, LENGTH = (0x00010000 - 0x24)
+  STACK (rw) : ORIGIN = 0x00210000, LENGTH = 0x00000000
+}
+
+
+/* Section Definitions */
+
+SECTIONS
+{
+	. = 0x00000000;
+	/* first section is .text which is used for code */
+	.text 0x00101000: AT ( 0x00000000 ) { 
+  		src/start/Cstartup_app.o (.text)
+		* (.text)
+		* (.rodata*)
+  		. = ALIGN(4);
+  	} >FLASH
+
+  	_etext = . ;
+	PROVIDE (etext = .);
+
+	/* 0x00200000 ... */
+	.data 0x00200024: AT ( ADDR(.text) + SIZEOF(.text) - ADDR(.text) ) {
+  		_data = . ;
+  		* (.data)
+  		. = ALIGN(4);
+  	} >DATA
+
+  	_edata = . ;
+	PROVIDE (edata = .);
+	
+	/* .bss section which is used for uninitialized data */
+	.bss : {
+		__bss_start = . ;
+		__bss_start__ = . ;
+		*(.bss)
+		*(COMMON)
+	} >DATA
+
+	. = ALIGN(4);
+	__bss_end__ = . ;
+	__bss_end__ = . ;
+
+	PROVIDE (main = .);
+
+	_end = . ;
+
+	. = ALIGN(4);
+	.int_data : { 
+		*(.internal_ram_top) 
+   	} >STACK 
+
+	PROVIDE (end = .);
+
+  /* Stabs debugging sections.  */
+  .stab          0 : { *(.stab) }
+  .stabstr       0 : { *(.stabstr) }
+  .stab.excl     0 : { *(.stab.excl) }
+  .stab.exclstr  0 : { *(.stab.exclstr) }
+  .stab.index    0 : { *(.stab.index) }
+  .stab.indexstr 0 : { *(.stab.indexstr) }
+  .comment       0 : { *(.comment) }
+  /* DWARF debug sections.
+     Symbols in the DWARF debugging sections are relative to the beginning
+     of the section so we begin them at 0.  */
+  /* DWARF 1 */
+  .debug          0 : { *(.debug) }
+  .line           0 : { *(.line) }
+  /* GNU DWARF 1 extensions */
+  .debug_srcinfo  0 : { *(.debug_srcinfo) }
+  .debug_sfnames  0 : { *(.debug_sfnames) }
+  /* DWARF 1.1 and DWARF 2 */
+  .debug_aranges  0 : { *(.debug_aranges) }
+  .debug_pubnames 0 : { *(.debug_pubnames) }
+  /* DWARF 2 */
+  .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
+  .debug_abbrev   0 : { *(.debug_abbrev) }
+  .debug_line     0 : { *(.debug_line) }
+  .debug_frame    0 : { *(.debug_frame) }
+  .debug_str      0 : { *(.debug_str) }
+  .debug_loc      0 : { *(.debug_loc) }
+  .debug_macinfo  0 : { *(.debug_macinfo) }
+  /* SGI/MIPS DWARF 2 extensions */
+  .debug_weaknames 0 : { *(.debug_weaknames) }
+  .debug_funcnames 0 : { *(.debug_funcnames) }
+  .debug_typenames 0 : { *(.debug_typenames) }
+  .debug_varnames  0 : { *(.debug_varnames) }
+
+}