ref: 8043614f797a269cfc9772998a3a1d46c139a1b7
dir: /sys/src/9/omap4/l.s/
#include "arm.s"
#include "mem.h"
TEXT _start(SB), 1, $-4
MOVW $setR12(SB), R12
ADD $(PHYSDRAM - KZERO), R12
MOVW $(PsrDirq | PsrDfiq | PsrMsvc), CPSR
MOVW $0x48020014, R1
uartloop:
MOVW (R1), R0
AND.S $(1<<6), R0
B.EQ uartloop
EWAVE('\r')
EWAVE('\n')
MRC CpSC, 0, R1, C(CpCONTROL), C(0), CpMainctl
BIC $(CpCmmu), R1
MCR CpSC, 0, R1, C(CpCONTROL), C(0), CpMainctl
EWAVE('P')
MOVW $KZERO, R1
MOVW $(PHYSDRAM|PTEDRAM), R2
MOVW $256, R3
BL _mapmbs(SB)
MOVW $PHYSDRAM, R1
MOVW $(PHYSDRAM|PTEDRAM), R2
MOVW $256, R3
BL _mapmbs(SB)
MOVW $0x48000000, R1
MOVW $(0x48000000| L1AP(Krw) | Section | PTEIO), R2
MOVW $1, R3
BL _mapmbs(SB)
EWAVE('l')
MOVW $L1PT, R1
MCR CpSC, 0, R1, C(CpTTB), C(0), CpTTB0
MCR CpSC, 0, R1, C(CpTTB), C(0), CpTTB1
EWAVE('a')
MOVW $Client, R1
MCR CpSC, 0, R1, C(CpDAC), C(0)
MOVW $0, R1
MCR CpSC, 0, R1, C(CpPID), C(0x0)
EWAVE('n')
MRC CpSC, 0, R1, C(CpCONTROL), C(0), CpMainctl
ORR $(CpCmmu|CpChv|CpCsw|CpCicache), R1
MCR CpSC, 0, R1, C(CpCONTROL), C(0), CpMainctl
EWAVE(' ')
BL _jumphi(SB)
EWAVE('9')
MOVW $setR12(SB), R12
MOVW $KTZERO, R13
EWAVE(' ')
BL main(SB)
a:
WFI
B a
BL _div(SB) /* hack */
/* R1: virtual start, R2: physical start, R3: number of MB */
TEXT _mapmbs(SB), 1, $-4
MOVW $L1PT, R11
ADD R1>>18, R11, R1
mapmbsl:
MOVW.P R2, 4(R1)
ADD $MiB, R2
SUB.S $1, R3
B.NE mapmbsl
MOVW R14, PC
TEXT _jumphi(SB), 1, $-4
ADD $(KZERO - PHYSDRAM), R14
MOVW R14, PC
TEXT coherence(SB), 1, $-4
BARRIERS
RET
TEXT splhi(SB), 1, $-4
MOVW CPSR, R0
CPSID
MOVW $(MACHADDR + 4), R11
MOVW R14, (R11)
RET
TEXT spllo(SB), 1, $-4
MOVW CPSR, R0
CPSIE
RET
TEXT splx(SB), 1, $-4
MOVW CPSR, R1
MOVW R0, CPSR
MOVW R1, R0
RET
TEXT islo(SB), 1, $-4
MOVW CPSR, R0
AND $PsrDirq, R0
EOR $PsrDirq, R0
RET
TEXT tas(SB), $-4
TEXT _tas(SB), $-4
spintas:
LDREX(0,1)
CMP.S $0, R1
B.NE tasnope
MOVW $1, R3
STREX(0,3,2)
CMP.S $0, R2
B.NE spintas
tasnope:
CLREX
MOVW R1, R0
RET
TEXT cmpswap(SB), $-4
MOVW 4(FP), R3
MOVW 8(FP), R4
casspin:
LDREX(0,1)
CMP.S R3, R1
B.NE casfail
STREX(0,1,2)
CMP.S $0, R2
B.NE casspin
MOVW $1, R0
RET
casfail:
CLREX
MOVW $0, R0
RET
TEXT setlabel(SB), 1, $-4
MOVW R13, 0(R0)
MOVW R14, 4(R0)
MOVW $0, R0
RET
TEXT gotolabel(SB), 1, $-4
MOVW 0(R0), R13
MOVW 4(R0), R14
MOVW $1, R0
RET
TEXT idlehands(SB), 1, $-4
BARRIERS
WFI
RET
TEXT flushtlb(SB), $-4
BARRIERS
MCR CpSC, 0, R1, C(8), C(7), 0
RET
#define TRAP(n,a)\
SUB $n, R14;\
WORD $0xf96d0513;\
WORD $0xf10e0093;\
MOVW R14, -8(R13);\
MOVW $a, R14;\
MOVW R14, -4(R13);\
B _trap(SB)
TEXT _reset(SB), 1, $-4
TRAP(4, 0)
TEXT _undefined(SB), 1, $-4
TRAP(4, 1)
TEXT _prefabort(SB), 1, $-4
TRAP(4, 3)
TEXT _dataabort(SB), 1, $-4
TRAP(8, 4)
TEXT _wtftrap(SB), 1, $-4
TRAP(4, 5)
TEXT _irq(SB), 1, $-4
TRAP(4, 6)
TEXT _fiq(SB), 1, $-4
TRAP(4, 7)
TEXT _trap(SB), 1, $-4
SUB $64, R13
MOVM.IA [R0-R12], (R13)
MOVW $setR12(SB), R12
MOVW 64(R13), R0
MOVW 68(R13), R1
MOVW R0, 68(R13)
MOVW R1, 64(R13)
ADD $72, R13, R0
MOVW R0, 52(R13)
MOVW R13, R0
SUB $8, R13
BL trap(SB)
MOVW 72(R13), R0
AND $PsrMask, R0
CMP $PsrMusr, R0
B.EQ _forkret
ADD $8, R13
MOVW 68(R13), R0
MOVW R0, 60(R13)
MOVW 64(R13), R0
MOVW R0, SPSR
MOVW R13, R0
ADD $72, R13
WORD $0xE8D0FFFF
TEXT _syscall(SB), 1, $-4
WORD $0xf96d0513
WORD $0xf10e0093
SUB $64, R13
MOVM.IA.S [R0-R14], (R13)
MOVW $setR12(SB), R12
MOVW 64(R13), R0
MOVW 68(R13), R1
MOVW R0, 68(R13)
MOVW R1, 64(R13)
MOVW R13, R0
SUB $8, R13
BL syscall(SB)
TEXT forkret(SB), 1, $-4
_forkret:
ADD $8, R13
MOVW R13, R0
ADD $72, R13
TEXT touser(SB), 1, $-4
ADD $52, R0
MOVM.IA.S (R0), [R13-R14]
SUB $52, R0
MOVW 68(R0), R1
MOVW R1, 52(R0)
MOVW 64(R0), R1
MOVW R1, SPSR
WORD $0xE8D09FFF
TEXT fillureguser(SB), $-4
ADD $52, R0
MOVM.IA.S [R13-R14], (R0)
RET
TEXT dumpstack(SB), 0, $8
MOVW R14, 8(R13)
ADD $12, R13, R0
BL _dumpstack(SB)
RET
TEXT getdfsr(SB), 0, $-4
MRC CpSC, 0, R0, C(5), C(0), 0
RET
TEXT getifsr(SB), 0, $-4
MRC CpSC, 0, R0, C(5), C(0), 1
RET
TEXT getdfar(SB), 0, $-4
MRC CpSC, 0, R0, C(6), C(0), 0
RET
TEXT getifar(SB), 0, $-4
MRC CpSC, 0, R0, C(6), C(0), 2
RET
TEXT getr13(SB), 0, $-4
MOVW R13, R0
RET