diff options
Diffstat (limited to 'libgcc/config/ft32/crti-hw.S')
| -rw-r--r-- | libgcc/config/ft32/crti-hw.S | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/libgcc/config/ft32/crti-hw.S b/libgcc/config/ft32/crti-hw.S new file mode 100644 index 0000000000..c2951fc3c2 --- /dev/null +++ b/libgcc/config/ft32/crti-hw.S @@ -0,0 +1,192 @@ +.global _start +_start: +# START Interrupt Vector Table [[ + jmp __PMSIZE-4 + jmp watchdog_init + jmp interrupt_0 + jmp interrupt_1 + jmp interrupt_2 + jmp interrupt_3 + jmp interrupt_4 + jmp interrupt_5 + jmp interrupt_6 + jmp interrupt_7 + jmp interrupt_8 + jmp interrupt_9 + jmp interrupt_10 + jmp interrupt_11 + jmp interrupt_12 + jmp interrupt_13 + jmp interrupt_14 + jmp interrupt_15 + jmp interrupt_16 + jmp interrupt_17 + jmp interrupt_18 + jmp interrupt_19 + jmp interrupt_20 + jmp interrupt_21 + jmp interrupt_22 + jmp interrupt_23 + jmp interrupt_24 + jmp interrupt_25 + jmp interrupt_26 + jmp interrupt_27 + jmp interrupt_28 + jmp interrupt_29 + jmp interrupt_30 + jmp interrupt_31 + jmp __PMSIZE-8 +# ]] END Interrupt Vector Table + +codestart: + jmp init + +.global _exithook +_exithook: # Debugger uses '_exithook' at 0x90 to catch program exit + return + +watchdog_init: + ldk $r0,1 +init: + ldk $sp,__RAMSIZE + # Disable all interrupts + ldk $r4,0x80 + sta.b 0x100e3,$r4 + + # Initialize DATA by copying from program memory + ldk.l $r4,__data_load_start + ldk.l $r1,__data_load_end + ldk.l $r2,0 # Will use __data after binutils patch + + jmp .dscopy +.dsloop: + # Copy PM[$r4] to RAM $r2 + lpmi.l $r3,$r4,0 + sti.l $r2,0,$r3 + add.l $r4,$r4,4 + add.l $r2,$r2,4 +.dscopy: + cmp.l $r4,$r1 + jmpc lt,.dsloop + + # Zero BSS + ldk.l $r4,_bss_start + ldk.l $r2,_end + sub.l $r2,$r2,$r4 + ldk.l $r1,0 + ldk $r3,32764 +1: + cmp $r2,$r3 + jmpc lt,2f + memset $r4,$r1,$r3 + add $r4,$r4,$r3 + sub $r2,$r2,$r3 + jmp 1b +2: + memset $r4,$r1,$r2 + + sub.l $sp,$sp,24 # Space for the caller argument frame + call main + +.equ EXITEXIT,0x1fffc + +.global _exit +_exit: + sta.l EXITEXIT,$r0 # simulator end of test + jmp _exithook + +# Macro to construct the interrupt stub code. +# it just saves r0, loads r0 with the int vector +# and branches to interrupt_common. + +.macro inth i=0 +interrupt_\i: + push $r0 # { + lda $r0,(vector_table + 4 * \i) + jmp interrupt_common +.endm + + inth 0 + inth 1 + inth 2 + inth 3 + inth 4 + inth 5 + inth 6 + inth 7 + inth 8 + inth 9 + inth 10 + inth 11 + inth 12 + inth 13 + inth 14 + inth 15 + inth 16 + inth 17 + inth 18 + inth 19 + inth 20 + inth 21 + inth 22 + inth 23 + inth 24 + inth 25 + inth 26 + inth 27 + inth 28 + inth 29 + inth 30 + inth 31 + inth 32 + + # On entry: r0, already saved, holds the handler function +interrupt_common: + push $r1 # { + push $r2 # { + push $r3 # { + push $r4 # { + push $r5 # { + push $r6 # { + push $r7 # { + push $r8 # { + push $r9 # { + push $r10 # { + push $r11 # { + push $r12 # { + push $cc # { + + calli $r0 + + pop $cc # } + pop $r12 # } + pop $r11 # } + pop $r10 # } + pop $r9 # } + pop $r8 # } + pop $r7 # } + pop $r6 # } + pop $r5 # } + pop $r4 # } + pop $r3 # } + pop $r2 # } + pop $r1 # } + pop $r0 # } matching push in interrupt_0-31 above + reti + + # Null function for unassigned interrupt to point at +.global nullvector +nullvector: + return + +.section .data +.global vector_table +vector_table: + .rept 33 + .long nullvector + .endr + + +.section .text +.global __gxx_personality_sj0 +__gxx_personality_sj0: |