;-----------------------------------------------------------------------------
; system stack
;-----------------------------------------------------------------------------
STACKSIZE .set 0x200
.section ".stack.bss", bss
.align 4
.ds (STACKSIZE)
.align 4
_stacktop:
;-----------------------------------------------------------------------------
; section initialize table
;-----------------------------------------------------------------------------
.section ".INIT_DSEC.const", const
.align 4
.dw #__s.data, #__e.data, #__s.data.R
.section ".INIT_BSEC.const", const
.align 4
.dw #__s.bss, #__e.bss
;-----------------------------------------------------------------------------
; startup
;-----------------------------------------------------------------------------
.section ".text.cmn", text
.public __cstart_pm1
.align 2
__cstart_pm1:
mov #_stacktop, sp ; set sp register
mov #__gp_data, gp ; set gp register
mov #__ep_data, ep ; set ep register
mov #__s.INIT_DSEC.const, r6
mov #__e.INIT_DSEC.const, r7
mov #__s.INIT_BSEC.const, r8
mov #__e.INIT_BSEC.const, r9
jarl32 __INITSCT_RH, lp ; initialize RAM area
; set various flags to PSW via FEPSW
stsr 5, r10, 0 ; r10 <- PSW
movhi 0x0001, r0, r11
or r11, r10
ldsr r10, 5, 0 ; enable FPU
movhi 0x0002, r0, r11
ldsr r11, 6, 0 ; initialize FPSR
ldsr r0, 7, 0 ; initialize FPEPC
stsr 5, r10, 0 ; r10 <- PSW
;xori 0x0020, r10, r10 ; enable interrupt
;movhi 0x4000, r0, r11
;or r11, r10 ; supervisor mode -> user mode
ldsr r10, 3, 0 ; FEPSW <- r10
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