ppc/85xx: Introduce RESET_VECTOR_ADDRESS to handle non-standard link address

Some board ports place TEXT_BASE at a location that would cause the
RESET_VECTOR_ADDRESS not to be at 0xfffffffc when we link.  By default
we assume RESET_VECTOR_ADDRESS will be 0xfffffffc if the board doesn't
explicitly set it.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Wolfgang Denk <wd@denx.de>

board/freescale/mpc8536ds/config.mk

@@ -26,3 +26,5 @@
 ifndef TEXT_BASE
 TEXT_BASE = 0xeff80000
 endif
+
+RESET_VECTOR_ADDRESS = 0xeffffffc

board/freescale/mpc8572ds/config.mk

@@ -26,3 +26,5 @@
 ifndef TEXT_BASE
 TEXT_BASE = 0xeff80000
 endif
+
+RESET_VECTOR_ADDRESS = 0xeffffffc

board/freescale/p1_p2_rdb/config.mk

@@ -27,3 +27,5 @@
 ifndef TEXT_BASE
 TEXT_BASE = 0xeff80000
 endif
+
+RESET_VECTOR_ADDRESS = 0xeffffffc

board/freescale/p2020ds/config.mk

@@ -26,3 +26,5 @@
 ifndef TEXT_BASE
 TEXT_BASE = 0xeff80000
 endif
+
+RESET_VECTOR_ADDRESS = 0xeffffffc

config.mk

@@ -128,6 +128,10 @@ ifneq ($(TEXT_BASE),)
 CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE)
 endif
 
+ifneq ($(RESET_VECTOR_ADDRESS),)
+CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
+endif
+
 ifneq ($(OBJTREE),$(SRCTREE))
 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
 endif

cpu/mpc85xx/u-boot.lds

@@ -20,6 +20,10 @@
  * MA 02111-1307 USA
  */
 
+#ifndef RESET_VECTOR_ADDRESS
+#define RESET_VECTOR_ADDRESS	0xfffffffc
+#endif
+
 OUTPUT_ARCH(powerpc)
 /* Do we need any of these for elf?
    __DYNAMIC = 0;    */
@@ -116,17 +120,17 @@ SECTIONS
   . = ALIGN(256);
   __init_end = .;
 
-  .bootpg ADDR(.text) + 0x7f000 :
+  .bootpg RESET_VECTOR_ADDRESS - 0xffc :
   {
     cpu/mpc85xx/start.o	(.bootpg)
   } :text = 0xffff
 
-  .resetvec ADDR(.text) + 0x7fffc :
+  .resetvec RESET_VECTOR_ADDRESS :
   {
     *(.resetvec)
   } :text = 0xffff
 
-  . = ADDR(.text) + 0x80000;
+  . = RESET_VECTOR_ADDRESS + 0x4;
 
   __bss_start = .;
   .bss (NOLOAD)       :