imx233/fuze+: rework linker script to load the bootloader at ram start + 1Mb to leave a load for the firmware

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30521 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 20 insertions, 10 deletions

diff --git a/firmware/target/arm/imx233/boot.lds b/firmware/target/arm/imx233/boot.lds
index fb6ffdcf23..206e0bb99f 100644
--- a/firmware/target/arm/imx233/boot.lds
+++ b/firmware/target/arm/imx233/boot.lds
@@ -6,28 +6,35 @@ OUTPUT_FORMAT(elf32-littlearm)
 OUTPUT_ARCH(arm)
 STARTUP(target/arm/imx233/crt0.o)
 
+/* Leave a hole at the beginning of the RAM to load the firmware */
+#define RAM_HOLE    1024 * 1024
+
+/* Make a difference between virtual and physical address so that we can use
+ * the resulting elf file with the elftosb tools which loads at the *physical*
+ * address */
+
 MEMORY
 {
     IRAM : ORIGIN = IRAM_ORIG, LENGTH = IRAM_SIZE
-    DRAM : ORIGIN = CACHED_DRAM_ADDR, LENGTH = DRAM_SIZE - TTB_SIZE - FRAME_SIZE
-    UNCACHED_DRAM : ORIGIN = UNCACHED_DRAM_ADDR, LENGTH = DRAM_SIZE - TTB_SIZE - FRAME_SIZE
+    DRAM : ORIGIN = CACHED_DRAM_ADDR + RAM_HOLE, LENGTH = DRAM_SIZE - TTB_SIZE - FRAME_SIZE - RAM_HOLE
+    UDRAM : ORIGIN = UNCACHED_DRAM_ADDR + RAM_HOLE, LENGTH = DRAM_SIZE - TTB_SIZE - FRAME_SIZE - RAM_HOLE
 }
 
 SECTIONS
 {
+    loadaddress = UNCACHED_DRAM_ADDR;
+    _loadaddress = UNCACHED_DRAM_ADDR;
+    loadaddressend = UNCACHED_DRAM_ADDR + RAM_HOLE;
+    _loadaddressend = UNCACHED_DRAM_ADDR + RAM_HOLE;
+    
     .text :
     {
         *(.text*)
-    } > DRAM
-
-    .data :
-    {
         *(.data*)
         *(.rodata*)
-        _dataend = . ;
     } > DRAM
 
-    .iram :
+    .itext :
     {
         _iramstart = .; // always 0
         *(.vectors)
@@ -39,7 +46,7 @@ SECTIONS
         _iramend = .;
     } > IRAM AT> DRAM
 
-    _iramcopy = LOADADDR(.iram);
+    _iramcopy = LOADADDR(.itext);
 
     .ibss (NOLOAD) :
     {
@@ -58,6 +65,9 @@ SECTIONS
         stackend = .;
     } > DRAM
 
+    /* physical address of the stack */
+    stackend_phys = stackend - CACHED_DRAM_ADDR + UNCACHED_DRAM_ADDR;
+
     /* treat .bss and .ncbss as a single section */
     .bss (NOLOAD) :
     {
@@ -73,7 +83,7 @@ SECTIONS
         . = ALIGN(CACHEALIGN_SIZE);
     } AT> DRAM
 
-    .bssendadr . - UNCACHED_DRAM_ADDR + CACHED_DRAM_ADDR (NOLOAD) :
+    .bssendadr (NOLOAD) :
     {
         _end = .;
     } > DRAM