altos: Use #define values for ublox packet types

[fw/altos] / src / stm / altos-loader.ld

diff --git a/src/stm/altos-loader.ld b/src/stm/altos-loader.ld
index 2d71b4eeeb070511e5a47a01b226f2ed2552687f..2be964f2a7bad6bc5598ac9a249085273ace66c5 100644 (file)
--- a/src/stm/altos-loader.ld
+++ b/src/stm/altos-loader.ld
@@ -16,8 +16,8 @@
  */
 
 MEMORY {
-       rom (rx) : ORIGIN = 0x08000000, LENGTH = 8K
-       ram (!w) : ORIGIN = 0x20000000, LENGTH = 16K
+       rom : ORIGIN = 0x08000000, LENGTH = 4K
+       ram : ORIGIN = 0x20000000, LENGTH = 16K
 }
 
 INCLUDE registers.ld
@@ -29,7 +29,7 @@ SECTIONS {
         * Rom contents
         */
 
-       .text ORIGIN(rom) : {
+       .text : {
                __text_start__ = .;
                *(.interrupt)   /* Interrupt vectors */
 
@@ -37,27 +37,49 @@ SECTIONS {
 
                ao_romconfig.o(.romconfig*)
                ao_product.o(.romconfig*)
-
-               *(.text*)       /* Executable code */
-               *(.rodata*)     /* Constants */
-
-       } > rom
-
-       .ARM.exidx : {
+               *(.text)        /* Executable code */
                *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+               *(.rodata*)     /* Constants */
                __text_end__ = .;
        } > rom
 
-       /* Data -- relocated to RAM, but written to ROM
+       /* Boot data which must live at the start of ram so that
+        * the application and bootloader share the same addresses.
+        * This must be all uninitialized data
+        */
+       .boot (NOLOAD) : {
+               __boot_start__ = .;
+               *(.boot)
+               __boot_end__ = .;
+       } >ram
+
+       /* Functions placed in RAM (required for flashing)
+        *
+        * Align to 8 bytes as that's what the ARM likes text
+        * segment alignments to be, and if we don't, then
+        * we end up with a mismatch between the location in
+        * ROM and the desired location in RAM. I don't
+        * entirely understand this, but at least this appears
+        * to work...
         */
-       .data ORIGIN(ram) : AT (ADDR(.ARM.exidx) + SIZEOF (.ARM.exidx)) {
+
+       .textram BLOCK(8): {
                __data_start__ = .;
+               __text_ram_start__ = .;
+               *(.text.ram)
+               __text_ram_end = .;
+       } >ram AT>rom
+
+       /* Data -- relocated to RAM, but written to ROM
+        */
+       .data : {
                *(.data)        /* initialized data */
                __data_end__ = .;
-               __bss_start__ = .;
-       } >ram
+       } >ram AT>rom
+
 
        .bss : {
+               __bss_start__ = .;
                *(.bss)
                *(COMMON)
                __bss_end__ = .;