#define __ASSEMBLER__
#include "config.h"
#include "cpu.h"

ENTRY(_vectors)

OUTPUT_FORMAT(elf32-littlearm)
OUTPUT_ARCH(arm)
STARTUP(target/arm/tms320dm320/crt0.o)

/* Bootloader only uses/knows about the upper 32 M */
#define DRAMSIZE    (MEMORYSIZE * 0x100000 / 2)
#define DRAMORIG    CONFIG_SDRAM_START+DRAMSIZE

#define LCD_BEGIN   (DRAMORIG + DRAMSIZE - LCD_TTB_AREA)

#define IRAMORIG    0x00000000
#define IRAMSIZE    0x4000

#define FLASHORIG   0x00100000

#ifdef SANSA_CONNECT
/* Offset in flash from beginning, we don't want overwrite OF bootloader
 * due to recovery mode and more importantly - hardware block protection.
 * Rockbox bootloader is flashed into kernel partition and chainloaded
 * from OF bootloader via Arbitrary Code Execution exploit. The first
 * instruction must be position independent as Rockbox bootloader will be
 * copied to RAM at 0x01000000 and executed from RAM.
 */
#define FLASHSIZE     0x00400000
#define FLASHMEMORIG  0x00120010
/* Kernel partition is 2 M, srr header is 16 bytes, sig is 2048 bytes */
#define FLASHMEMSIZE  0x001FF7F0
#else
/* On targets other than Sansa Connect use whole flash for bootloader */
#define FLASHSIZE     0x00800000
#define FLASHMEMORIG   FLASHORIG
#define FLASHMEMSIZE   FLASHSIZE
#endif

PRO_STACK_SIZE =  0x2000;
IRQ_STACK_SIZE =  0x400;
FIQ_STACK_SIZE =  0x400;

MEMORY
{
   DRAM : ORIGIN = DRAMORIG, LENGTH = DRAMSIZE
   IRAM : ORIGIN = IRAMORIG, LENGTH = IRAMSIZE
   FLASH : ORIGIN = FLASHMEMORIG, LENGTH = FLASHMEMSIZE
}

SECTIONS
{
    /* Set up variables needed for memory initialization */
    _sdram_start    = DRAMORIG;
    _sdram_sizem    = (DRAMSIZE / 0x100000);

    _flash_start    = FLASHORIG;
    _flash_sizem    = (FLASHSIZE / 0x100000);

    .vectors :
    {
        _vectorsstart = .;
        KEEP(*(.vectors))
        _vectorsend = .;
    } > IRAM AT> FLASH
    _vectorscopy = LOADADDR(.vectors);

    /* crt0.S initialization */
    .init :
    {
        . = ALIGN(0x4);
        _loadaddress = .;
        *(.init)
    } > FLASH

    /* Program code */
    .text :
    {
        . = ALIGN(0x4);
        *(.text*)
    } > FLASH

    /* Thumb interworking sections - for some reason LD dies even if these
     * sections are empty.
     */
    .glue :
    {
       . = ALIGN(0x4);
       *(.glue_7)  /* ARM calling Thumb */
       *(.glue_7t) /* Thumb calling ARM */
    } > FLASH

    /* Read-only data */
    .rodata :
    {
        . = ALIGN(0x4);
        *(.rodata*)
    } > FLASH

    /* Dynamic data - this needs to be copied out of flash before it is used. */
    .data :
    {
        . = ALIGN(0x4);
        _dramstart = .;
        *(.data*)
        _dramend = .;
    } > DRAM AT> FLASH
    _dramcopy = LOADADDR(.data);

 	.bss (NOLOAD) :
    {
        . = ALIGN(0x4);
       	_bss_start = .;
        *(.bss*)
        *(COMMON)
       	_bss_end = .;
    } > DRAM

    .iram :
    {
        . = ALIGN(0x4);
        _iramstart = .;
        *(.icode*)
        *(.irodata*)
        *(.idata*)
        _iramend = .;
    } > IRAM AT> FLASH

    _iramcopy = LOADADDR(.iram);

    .ibss (NOLOAD) :
    {
        . = ALIGN(0x4);
        _ibss_start = .;
        *(.ibss*)
        _ibss_end = .;
    } > IRAM

    /* Program stack space */
    .pro_stack (NOLOAD):
    {
        . = ALIGN(0x4);
        *(.stack)
        stackbegin = .;        /* Variable for thread.c */
        _pro_stack_end = .;
        . += PRO_STACK_SIZE;
        _pro_stack_start = .;
        stackend = .;          /* Variable for tread.c */
    } > IRAM

    /* IRQ stack space */
    .irq_stack (NOLOAD):
    {
        . = ALIGN(0x4);
        _irq_stack_end = .;
        . += IRQ_STACK_SIZE;
        _irq_stack_start = .;
    } > IRAM

    /* FIQ stack space */
    .fiq_stack (NOLOAD):
    {
        . = ALIGN(0x4);
        _fiq_stack_end = .;
        . += FIQ_STACK_SIZE;
        _fiq_stack_start = .;
    } > IRAM

#ifdef MROBE_500
    .ttbtable LCD_BEGIN (NOLOAD) :
    {
        . = ALIGN (0x4000);
        _ttbstart = .;
        . += TTB_SIZE;
    } > DRAM

    /* The LCD buffer should be at the end of memory to protect against
     * overflowing something else when the YUV blitter is fudging the screen
     * size.
     */

    .lcdbuffer (NOLOAD) :
    {
        _lcdbuf = .;
        . += LCD_BUFFER_SIZE;
    } > DRAM

    .lcdbuffer2 (NOLOAD) :
    {
        _lcdbuf2 = .;
        . += LCD_BUFFER_SIZE;
    } > DRAM
#else
    .lcdbuffer LCD_BEGIN (NOLOAD) :
    {
        . = ALIGN(32);
        _lcdbuf = .;
        . += LCD_BUFFER_SIZE;
    } > DRAM

    /* Place TTB at the end of RAM to minimize alignment losses */
    .ttbtable (NOLOAD) :
    {
        . = ALIGN (0x4000);
        _ttbstart = .;
        . += TTB_SIZE;
    } > DRAM
#endif
}