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|
SRAM_ORIGIN=0x03000000
SRAM_LENGTH=0x00100000
# HEAPEND must be in the same memory region as DATA. STACK should be
# above HEAPEND, also in the same region, for configurations which
# need __stack.
case $MODE in
rom)
CRT0=rom
TEXT=rom
DATA=sram
DATALOAD="rom"
STACK=0x030ffffc
HEAPEND=0x03080000
;;
sram)
CRT0=ram
TEXT=sram
DATA=sdram
STACK=0x021ffffc
HEAPEND=0x02180000
# Leave the rest of SDRAM for manual use.
;;
sdram)
CRT0=ram
TEXT=sdram
DATA=sdram
STACK=0x021ffffc
HEAPEND=0x02180000
# Leave the rest of SDRAM for manual use.
;;
redboot)
CRT0=redboot
# We need to avoid the area used by RedBoot
SRAM_ORIGIN=0x3080000
SRAM_LENGTH=0x80000
# Put code for RedBoot apps in SRAM, since the fido1100 has
# trouble running code from SDRAM.
TEXT=sram
DATA=sdram
STACK=0
HEAPEND=0x027f0000
;;
*)
ERROR
;;
esac
cat <<EOF
/*
* Setup the memory map of the Innovasic SBC
* stack grows down from high memory.
*
* The memory map for the ROM model looks like this:
*
* +--------------------+ <-address 0 in Flash
* | .vector_table |
* +--------------------+ <- low memory
* | .text |
* | _etext |
* | ctor list | the ctor and dtor lists are for
* | dtor list | C++ support
* +--------------------+
* | DCACHE_CODE | code to be loaded into DCACHE
* | _dcache_start |
* | _dcache_end |
* +--------------------+
* | .data | initialized data goes here
* +--------------------+
* . .
* . .
* . .
* +--------------------+ <- The beginning of the SRAM area
* | .data | a wriable copy of data goes here.
* | _edata |
* +--------------------+
* | .bss |
* | __bss_start | start of bss, cleared by crt0
* | _end | start of heap, used by sbrk()
* | _heapend | End of heap, used by sbrk()
* +--------------------+
* . .
* . .
* . .
* | __stack | top of stack
* +--------------------+
*
*
* The memory map for the RAM model looks like this:
*
* +--------------------+ <- The beginning of the SRAM or SDRAM area.
* | .vector_table |
* +--------------------+ <- low memory
* | .text |
* | _etext |
* | ctor list | the ctor and dtor lists are for
* | dtor list | C++ support
* +--------------------+
* | DCACHE_CODE | code to be loaded into DCACHE
* | _dcache_start |
* | _dcache_end |
* +--------------------+
* | .data | initialized data goes here
* | _edata |
* +--------------------+
* | .bss |
* | __bss_start | start of bss, cleared by crt0
* | _end | start of heap, used by sbrk()
* | _heapend | End of heap, used by sbrk()
* +--------------------+
* . .
* . .
* . .
* | __stack | top of stack
* +--------------------+
*/
STARTUP(fido-${CRT0}-crt0.o)
OUTPUT_ARCH(m68k)
ENTRY(_start);
GROUP(-l${IO} -lfido -lc -lgcc)
MEMORY {
/* Flash ROM. */
rom (rx) : ORIGIN = 0x0000000, LENGTH = 0x800000
/* Internal SRAM. */
int_ram (rwx) : ORIGIN = 0x1000000, LENGTH = 0x6000
/* External SDRAM. */
sdram (rwx) : ORIGIN = 0x2000000, LENGTH = 0x800000
/* External SRAM. */
sram (rwx) : ORIGIN = ${SRAM_ORIGIN}, LENGTH = ${SRAM_LENGTH}
}
SECTIONS {
/* The interrupt vector is placed at the beginning of ${TEXT},
as required at reset. */
.vector_table : {
*(.vector_table)
} > ${TEXT}
/* Text section. */
.text :
{
*(.text .text.*)
*(.gnu.linkonce.t.*)
. = ALIGN(0x4);
/* These are for running static constructors and destructors under ELF. */
KEEP (*crtbegin.o(.ctors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*crtend.o(.ctors))
KEEP (*crtbegin.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
KEEP (*(SORT(.dtors.*)))
KEEP (*crtend.o(.dtors))
. = ALIGN(0x4);
KEEP (*crtbegin.o(.jcr))
KEEP (*(EXCLUDE_FILE (*crtend.o) .jcr))
KEEP (*crtend.o(.jcr))
*(.rodata .rodata.*)
*(.gnu.linkonce.r.*)
*(.gcc_except_table)
*(.eh_frame)
. = ALIGN(0x2);
_init = . ;
LONG (0x4e560000) /* linkw %fp,#0 */
*(.init)
SHORT (0x4e5e) /* unlk %fp */
SHORT (0x4e75) /* rts */
_fini = . ;
LONG (0x4e560000) /* linkw %fp,#0 */
*(.fini)
SHORT (0x4e5e) /* unlk %fp */
SHORT (0x4e75) /* rts */
. = ALIGN(0x800); /* align to a 2K dcache boundary */
_dcache_start = .;
*(DCACHE_CODE)
_dcache_end = .;
_etext = .;
*(.lit)
. = ALIGN(0x4);
__start_romdata = .;
} > ${TEXT}
/* Initialized data section. */
.data :
{
_data = .;
*(.got.plt) *(.got)
*(.shdata);
*(.data .data.*)
*(.gnu.linkonce.d.*)
_edata_cksum = .;
*(checksum);
_edata = .;
} > ${DATA} ${DATALOAD:+AT>} ${DATALOAD}
/* Zero-initialized data. */
.bss :
{
. = ALIGN(0x4);
__bss_start = . ;
*(.shbss)
*(.bss .bss.*)
*(.gnu.linkonce.b.*)
*(COMMON)
_end = ALIGN (0x8);
__end = _end;
} > ${DATA}
/* Specially designated data is placed in the internal RAM. */
fast_memory :
{
. = ALIGN(0x4);
__fast_start = .;
*(FAST_RAM)
__fast_stop = .;
} > int_ram
}
PROVIDE (__stack = ${STACK});
PROVIDE (_heapend = ${HEAPEND});
EOF
|
