barebox-data: add barebox-data sections

Add barebox-data section in arm branch to get complete
barebox regions in sdram regions tree.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/lib/barebox.lds.S

@@ -66,6 +66,7 @@ SECTIONS
 	}
 #endif
 	_etext = .;			/* End of text and rodata section */
+	_sdata = .;
 
 	. = ALIGN(4);
 	.data : { *(.data*) }
@@ -87,6 +88,7 @@ SECTIONS
 	__usymtab : { BAREBOX_SYMS }
 	__usymtab_end = .;
 
+	_edata = .;
 	. = ALIGN(4);
 	__bss_start = .;
 	.bss : { *(.bss*) }

arch/blackfin/boards/ipe337/barebox.lds.S

@@ -55,6 +55,7 @@ SECTIONS
 	.rodata : { *(.rodata) }
 
 	__etext = .;			/* End of text and rodata section */
+	__sdata = .;
 
 	. = ALIGN(4);
 	.data : { *(.data) }
@@ -79,6 +80,7 @@ SECTIONS
 	__usymtab : { BAREBOX_SYMS }
 	___usymtab_end = .;
 
+	__edata = .;
 	. = ALIGN(4);
 	___bss_start = .;
 	.bss : { *(.bss) }

arch/mips/lib/barebox.lds.S

@@ -44,6 +44,7 @@ SECTIONS
 	.rodata : { *(.rodata*) }
 
 	_etext = .;			/* End of text and rodata section */
+	_sdata = .;
 
 	. = ALIGN(4);
 	.data : { *(.data*) }
@@ -68,6 +69,7 @@ SECTIONS
 	__usymtab : { BAREBOX_SYMS }
 	__usymtab_end = .;
 
+	_edata = .;
 	. = ALIGN(4);
 	__bss_start = .;
 	.bss : { *(.bss*) }

arch/nios2/cpu/barebox.lds.S

@@ -74,6 +74,7 @@ SECTIONS
 	 * adjacent to simplify the startup code -- and provide
 	 * the global pointer for gp-relative access.
 	 */
+	_sdata = .;
 	_data = .;
 	.data :
 	{

arch/ppc/boards/freescale-p2020rdb/barebox.lds.S

@@ -41,6 +41,7 @@ SECTIONS
 
   _etext = .;
   PROVIDE (etext = .);
+  _sdata = .;
 
   .rodata    :
   {

arch/ppc/boards/pcm030/barebox.lds.S

@@ -69,6 +69,7 @@ SECTIONS
   . = (. + 0x0FFF) & 0xFFFFF000;
   _etext = .;
   PROVIDE (erotext = .);
+  _sdata = .;
   .reloc   :
   {
     *(.got)

arch/x86/lib/barebox.lds.S

@@ -153,6 +153,7 @@ SECTIONS
 	} > barebox
 	BAREBOX_BARE_INIT_SIZE
 
+	_sdata = .;
 	.data : AT ( LOADADDR(.text) + SIZEOF(.text) ) {
 		*(.data*)
 		. = ALIGN(4);
@@ -191,6 +192,7 @@ SECTIONS
 		. = ALIGN(4);
 	} > barebox
 
+	_edata = .;
 	.bss : {
 		__bss_start = .;
 		*(.bss*);

common/memory.c

@@ -75,6 +75,10 @@ static int mem_malloc_resource(void)
 			(unsigned long)&_stext,
 			(unsigned long)&_etext -
 			(unsigned long)&_stext);
+	request_sdram_region("barebox data",
+			(unsigned long)&_sdata,
+			(unsigned long)&_edata -
+			(unsigned long)&_sdata);
 	request_sdram_region("bss",
 			(unsigned long)&__bss_start,
 			(unsigned long)&__bss_stop -

include/asm-generic/sections.h

@@ -3,6 +3,7 @@
 
 extern char _text[], _stext[], _etext[];
 extern char __bss_start[], __bss_stop[];
+extern char _sdata[], _edata[];
 extern char __bare_init_start[], __bare_init_end[];
 extern char _end[];
 extern void *_barebox_image_size;