fpc/rtl/embedded/avr/start.inc
Jeppe Johansen 55669f62b1 Added most AVR controllers.
Made absolutevarsym use PUint instead of AWord for its offset to fix range errors.

git-svn-id: trunk@31242 -
2015-07-29 21:01:21 +00:00

52 lines
1020 B
PHP

_start:
clr r1
// load stack pointer
ldi r30,lo8(_stack_top)
out 0x3d,r30
ldi r30,hi8(_stack_top)
out 0x3e,r30
// Initialize .data section
ldi XL,lo8(_data)
ldi XH,hi8(_data)
ldi YH,hi8(_edata)
ldi ZL,lo8(_etext)
ldi ZH,hi8(_etext)
rjmp .LCopyDataLoopEntry
.LCopyDataLoop:
lpm r0, Z+
st X+, r0
.LCopyDataLoopEntry:
cpi XL, lo8(_edata)
cpc XH, YH
brne .LCopyDataLoop
// Zero .bss section
ldi XL,lo8(_bss_start)
ldi XH,hi8(_bss_start)
ldi YH,hi8(_bss_end)
{$ifdef RELBRANCHES}
rjmp .LZeroBssLoopEntry
{$else RELBRANCHES}
jmp .LZeroBssLoopEntry
{$endif RELBRANCHES}
.LZeroBssLoop:
st X+, r1
.LZeroBssLoopEntry:
cpi XL, lo8(_bss_end)
cpc XH, YH
brne .LZeroBssLoop
{$ifdef RELBRANCHES}
rjmp PASCALMAIN
{$else RELBRANCHES}
jmp PASCALMAIN
{$endif RELBRANCHES}
.text