ref: c9d2fecbd06d0e9efc2fa16f214f1612a9a40d93
dir: /sys/src/9/bitsy/l.s/
#include "mem.h"
/*
* Entered here from Compaq's bootldr with MMU disabled.
*/
TEXT _start(SB), $-4
MOVW $setR12(SB), R12 /* load the SB */
_main:
/* SVC mode, interrupts disabled */
MOVW $(PsrDirq|PsrDfiq|PsrMsvc), R1
MOVW R1, CPSR
/* disable the MMU */
MOVW $0x130, R1
MCR CpMMU, 0, R1, C(CpControl), C(0x0)
/* flush caches */
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0x7), 0
/* drain prefetch */
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
/* drain write buffer */
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0xa), 4
MOVW $(MACHADDR+4*BY2PG), R13 /* stack */
SUB $4, R13 /* link */
BL main(SB)
BL exit(SB)
/* we shouldn't get here */
_mainloop:
B _mainloop
BL _div(SB) /* hack to get _div etc loaded */
/* flush tlb's */
TEXT mmuinvalidate(SB), $-4
MCR CpMMU, 0, R0, C(CpTLBFlush), C(0x7)
RET
/* flush tlb's */
TEXT mmuinvalidateaddr(SB), $-4
MCR CpMMU, 0, R0, C(CpTLBFlush), C(0x6), 1
RET
/* write back and invalidate i and d caches */
TEXT cacheflush(SB), $-4
/* splhi */
MOVW CPSR, R3
ORR $(PsrDirq), R3, R1
MOVW R1, CPSR
/* write back any dirty data */
MOVW $0xe0000000,R0
ADD $(8*1024),R0,R1
_cfloop:
MOVW.P 32(R0),R2
CMP.S R0,R1
BGE _cfloop
/* drain write buffer and invalidate i cache contents */
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0xa), 4
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0x5), 0
/* drain prefetch */
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
/* splx */
MOVW R3, CPSR
RET
/* write back d cache */
TEXT cachewb(SB), $-4
/* write back any dirty data */
_cachewb:
MOVW $0xe0000000,R0
ADD $(8*1024),R0,R1
_cwbloop:
MOVW.P 32(R0),R2
CMP.S R0,R1
BGE _cwbloop
/* drain write buffer */
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0xa), 4
RET
/* write back a single cache line */
TEXT cachewbaddr(SB), $-4
BIC $31,R0
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0xa), 1
B _wbflush
/* write back a region of cache lines */
TEXT cachewbregion(SB), $-4
MOVW 4(FP),R1
CMP.S $(4*1024),R1
BGT _cachewb
ADD R0,R1
BIC $31,R0
_cwbrloop:
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0xa), 1
ADD $32,R0
CMP.S R0,R1
BGT _cwbrloop
B _wbflush
/* invalidate the dcache */
TEXT dcacheinvalidate(SB), $-4
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0x6)
RET
/* invalidate the icache */
TEXT icacheinvalidate(SB), $-4
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0x9)
RET
/* drain write buffer */
TEXT wbflush(SB), $-4
_wbflush:
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0xa), 4
RET
/* return cpu id */
TEXT getcpuid(SB), $-4
MRC CpMMU, 0, R0, C(CpCPUID), C(0x0)
RET
/* return fault status */
TEXT getfsr(SB), $-4
MRC CpMMU, 0, R0, C(CpFSR), C(0x0)
RET
/* return mmu control register */
TEXT getcontrol(SB), $-4
SUB R0, R0
MRC CpMMU, 0, R0, C(CpControl), C(0x0)
RET
/* return mmu dac register */
TEXT getdac(SB), $-4
SUB R0, R0
MRC CpMMU, 0, R0, C(CpDAC), C(0x0)
RET
/* return mmu ttb register */
TEXT getttb(SB), $-4
SUB R0, R0
MRC CpMMU, 0, R0, C(CpTTB), C(0x0)
RET
/* return fault address */
TEXT getfar(SB), $-4
MRC CpMMU, 0, R0, C(CpFAR), C(0x0)
RET
/* set the translation table base */
TEXT putttb(SB), $-4
MCR CpMMU, 0, R0, C(CpTTB), C(0x0)
RET
/*
* enable mmu, i and d caches
*/
TEXT mmuenable(SB), $-4
MRC CpMMU, 0, R0, C(CpControl), C(0x0)
ORR $(CpCmmuena|CpCdcache|CpCicache|CpCwb|CpCsystem), R0
BIC $(CpCrom), R0
MCR CpMMU, 0, R0, C(CpControl), C(0x0)
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
RET
TEXT mmudisable(SB), $-4
MRC CpMMU, 0, R0, C(CpControl), C(0x0)
BIC $(CpCmmuena|CpCdcache|CpCicache|CpCwb|CpCvivec), R0
MCR CpMMU, 0, R0, C(CpControl), C(0x0)
RET
/*
* use exception vectors at 0xffff0000
*/
TEXT mappedIvecEnable(SB), $-4
MRC CpMMU, 0, R0, C(CpControl), C(0x0)
ORR $(CpCvivec), R0
MCR CpMMU, 0, R0, C(CpControl), C(0x0)
RET
TEXT mappedIvecDisable(SB), $-4
MRC CpMMU, 0, R0, C(CpControl), C(0x0)
BIC $(CpCvivec), R0
MCR CpMMU, 0, R0, C(CpControl), C(0x0)
RET
/* set the translation table base */
TEXT putdac(SB), $-4
MCR CpMMU, 0, R0, C(CpDAC), C(0x0)
RET
/* set address translation pid */
TEXT putpid(SB), $-4
MCR CpMMU, 0, R0, C(CpPID), C(0x0)
RET
/*
* set the stack value for the mode passed in R0
*/
TEXT setr13(SB), $-4
MOVW 4(FP), R1
MOVW CPSR, R2
BIC $PsrMask, R2, R3
ORR R0, R3
MOVW R3, CPSR
MOVW R13, R0
MOVW R1, R13
MOVW R2, CPSR
RET
/*
* exception vectors, copied by trapinit() to somewhere useful
*/
TEXT vectors(SB), $-4
MOVW 0x18(R15), R15 /* reset */
MOVW 0x18(R15), R15 /* undefined */
MOVW 0x18(R15), R15 /* SWI */
MOVW 0x18(R15), R15 /* prefetch abort */
MOVW 0x18(R15), R15 /* data abort */
MOVW 0x18(R15), R15 /* reserved */
MOVW 0x18(R15), R15 /* IRQ */
MOVW 0x18(R15), R15 /* FIQ */
TEXT vtable(SB), $-4
WORD $_vsvc(SB) /* reset, in svc mode already */
WORD $_vund(SB) /* undefined, switch to svc mode */
WORD $_vsvc(SB) /* swi, in svc mode already */
WORD $_vpabt(SB) /* prefetch abort, switch to svc mode */
WORD $_vdabt(SB) /* data abort, switch to svc mode */
WORD $_vsvc(SB) /* reserved */
WORD $_virq(SB) /* IRQ, switch to svc mode */
WORD $_vfiq(SB) /* FIQ, switch to svc mode */
TEXT _vrst(SB), $-4
BL resettrap(SB)
TEXT _vsvc(SB), $-4 /* SWI */
MOVW.W R14, -4(R13) /* ureg->pc = interupted PC */
MOVW SPSR, R14 /* ureg->psr = SPSR */
MOVW.W R14, -4(R13) /* ... */
MOVW $PsrMsvc, R14 /* ureg->type = PsrMsvc */
MOVW.W R14, -4(R13) /* ... */
MOVM.DB.W.S [R0-R14], (R13) /* save user level registers, at end r13 points to ureg */
MOVW $setR12(SB), R12 /* Make sure we've got the kernel's SB loaded */
MOVW R13, R0 /* first arg is pointer to ureg */
SUB $8, R13 /* space for argument+link */
BL syscall(SB)
ADD $(8+4*15), R13 /* make r13 point to ureg->type */
MOVW 8(R13), R14 /* restore link */
MOVW 4(R13), R0 /* restore SPSR */
MOVW R0, SPSR /* ... */
MOVM.DB.S (R13), [R0-R14] /* restore registers */
ADD $8, R13 /* pop past ureg->{type+psr} */
RFE /* MOVM.IA.S.W (R13), [R15] */
TEXT _vund(SB), $-4 /* undefined */
MOVM.IA [R0-R4], (R13) /* free some working space */
MOVW $PsrMund, R0
B _vswitch
TEXT _vpabt(SB), $-4 /* prefetch abort */
MOVM.IA [R0-R4], (R13) /* free some working space */
MOVW $PsrMabt, R0 /* r0 = type */
B _vswitch
TEXT _vdabt(SB), $-4 /* prefetch abort */
MOVM.IA [R0-R4], (R13) /* free some working space */
MOVW $(PsrMabt+1), R0 /* r0 = type */
B _vswitch
TEXT _virq(SB), $-4 /* IRQ */
MOVM.IA [R0-R4], (R13) /* free some working space */
MOVW $PsrMirq, R0 /* r0 = type */
B _vswitch
/*
* come here with type in R0 and R13 pointing above saved [r0-r4]
* and type in r0. we'll switch to SVC mode and then call trap.
*/
_vswitch:
MOVW SPSR, R1 /* save SPSR for ureg */
MOVW R14, R2 /* save interrupted pc for ureg */
MOVW R13, R3 /* save pointer to where the original [R0-R3] are */
/* switch to svc mode */
MOVW CPSR, R14
BIC $PsrMask, R14
ORR $(PsrDirq|PsrDfiq|PsrMsvc), R14
MOVW R14, CPSR
/* interupted code kernel or user? */
AND.S $0xf, R1, R4
BEQ _userexcep
/* here for trap from SVC mode */
MOVM.DB.W [R0-R2], (R13) /* set ureg->{type, psr, pc}; r13 points to ureg->type */
MOVM.IA (R3), [R0-R4] /* restore [R0-R4] from previous mode's stack */
MOVM.DB.W [R0-R14], (R13) /* save kernel level registers, at end r13 points to ureg */
MOVW $setR12(SB), R12 /* Make sure we've got the kernel's SB loaded */
MOVW R13, R0 /* first arg is pointer to ureg */
SUB $8, R13 /* space for argument+link (for debugger) */
MOVW $0xdeaddead,R11 /* marker */
BL trap(SB)
ADD $(8+4*15), R13 /* make r13 point to ureg->type */
MOVW 8(R13), R14 /* restore link */
MOVW 4(R13), R0 /* restore SPSR */
MOVW R0, SPSR /* ... */
MOVM.DB (R13), [R0-R14] /* restore registers */
ADD $8, R13 /* pop past ureg->{type+psr} */
RFE /* MOVM.IA.S.W (R13), [R15] */
/* here for trap from USER mode */
_userexcep:
MOVM.DB.W [R0-R2], (R13) /* set ureg->{type, psr, pc}; r13 points to ureg->type */
MOVM.IA (R3), [R0-R4] /* restore [R0-R4] from previous mode's stack */
MOVM.DB.W.S [R0-R14], (R13) /* save kernel level registers, at end r13 points to ureg */
MOVW $setR12(SB), R12 /* Make sure we've got the kernel's SB loaded */
MOVW R13, R0 /* first arg is pointer to ureg */
SUB $8, R13 /* space for argument+link (for debugger) */
BL trap(SB)
ADD $(8+4*15), R13 /* make r13 point to ureg->type */
MOVW 8(R13), R14 /* restore link */
MOVW 4(R13), R0 /* restore SPSR */
MOVW R0, SPSR /* ... */
MOVM.DB.S (R13), [R0-R14] /* restore registers */
ADD $8, R13 /* pop past ureg->{type+psr} */
RFE /* MOVM.IA.S.W (R13), [R15] */
TEXT _vfiq(SB), $-4 /* FIQ */
RFE /* FIQ is special, ignore it for now */
/*
* This is the first jump from kernel to user mode.
* Fake a return from interrupt.
*
* Enter with R0 containing the user stack pointer.
* UTZERO + 0x20 is always the entry point.
*
*/
TEXT touser(SB),$-4
/* store the user stack pointer into the USR_r13 */
MOVM.DB.W [R0], (R13)
MOVM.S.IA.W (R13),[R13]
/* set up a PSR for user level */
MOVW $(PsrMusr), R0
MOVW R0,SPSR
/* save the PC on the stack */
MOVW $(UTZERO+0x20), R0
MOVM.DB.W [R0],(R13)
/* return from interrupt */
RFE /* MOVM.IA.S.W (R13), [R15] */
/*
* here to jump to a newly forked process
*/
TEXT forkret(SB),$-4
ADD $(4*15), R13 /* make r13 point to ureg->type */
MOVW 8(R13), R14 /* restore link */
MOVW 4(R13), R0 /* restore SPSR */
MOVW R0, SPSR /* ... */
MOVM.DB.S (R13), [R0-R14] /* restore registers */
ADD $8, R13 /* pop past ureg->{type+psr} */
RFE /* MOVM.IA.S.W (R13), [R15] */
TEXT splhi(SB), $-4
/* save caller pc in Mach */
MOVW $(MACHADDR+0x04),R2
MOVW R14,0(R2)
/* turn off interrupts */
MOVW CPSR, R0
ORR $(PsrDirq), R0, R1
MOVW R1, CPSR
RET
TEXT spllo(SB), $-4
MOVW CPSR, R0
BIC $(PsrDirq), R0, R1
MOVW R1, CPSR
RET
TEXT splx(SB), $-4
/* save caller pc in Mach */
MOVW $(MACHADDR+0x04),R2
MOVW R14,0(R2)
/* reset interrupt level */
MOVW R0, R1
MOVW CPSR, R0
MOVW R1, CPSR
RET
TEXT splxpc(SB), $-4 /* for iunlock */
MOVW R0, R1
MOVW CPSR, R0
MOVW R1, CPSR
RET
TEXT spldone(SB), $0
RET
TEXT islo(SB), $-4
MOVW CPSR, R0
AND $(PsrDirq), R0
EOR $(PsrDirq), R0
RET
TEXT cpsrr(SB), $-4
MOVW CPSR, R0
RET
TEXT spsrr(SB), $-4
MOVW SPSR, R0
RET
TEXT getsp(SB), $-4
MOVW R13, R0
RET
TEXT getlink(SB), $-4
MOVW R14, R0
RET
TEXT getcallerpc(SB), $-4
MOVW 0(R13), R0
RET
TEXT tas(SB), $-4
TEXT _tas(SB), $-4
MOVW R0, R1
MOVW $0xDEADDEAD, R0
MOVW R0, R3
SWPW R0, (R1)
CMP.S R0, R3
BEQ _tasout
EOR R3, R3
CMP.S R0, R3
BEQ _tasout
MOVW $1,R15
_tasout:
RET
TEXT setlabel(SB), $-4
MOVW R13, 0(R0) /* sp */
MOVW R14, 4(R0) /* pc */
MOVW $0, R0
RET
TEXT gotolabel(SB), $-4
MOVW 0(R0), R13 /* sp */
MOVW 4(R0), R14 /* pc */
MOVW $1, R0
RET
/* save the state machine in power_state[] for an upcoming suspend
*/
TEXT setpowerlabel(SB), $-4
MOVW $power_state+0(SB), R0
/* svc */ /* power_state[]: what */
MOVW R1, 0(R0)
MOVW R2, 4(R0)
MOVW R3, 8(R0)
MOVW R4, 12(R0)
MOVW R5, 16(R0)
MOVW R6, 20(R0)
MOVW R7, 24(R0)
MOVW R8, 28(R0)
MOVW R9, 32(R0)
MOVW R10,36(R0)
MOVW R11,40(R0)
MOVW R12,44(R0)
MOVW R13,48(R0)
MOVW R14,52(R0)
MOVW SPSR, R1
MOVW R1, 56(R0)
MOVW CPSR, R2
MOVW R2, 60(R0)
/* copro */
MRC CpMMU, 0, R3, C(CpDAC), C(0x0)
MOVW R3, 144(R0)
MRC CpMMU, 0, R3, C(CpTTB), C(0x0)
MOVW R3, 148(R0)
MRC CpMMU, 0, R3, C(CpControl), C(0x0)
MOVW R3, 152(R0)
MRC CpMMU, 0, R3, C(CpFSR), C(0x0)
MOVW R3, 156(R0)
MRC CpMMU, 0, R3, C(CpFAR), C(0x0)
MOVW R3, 160(R0)
MRC CpMMU, 0, R3, C(CpPID), C(0x0)
MOVW R3, 164(R0)
/* usr */
BIC $(PsrMask), R2, R3
ORR $(0xdf), R3
MOVW R3, CPSR
MOVW SPSR, R11
MOVW R11, 168(R0)
MOVW R12, 172(R0)
MOVW R13, 176(R0)
MOVW R14, 180(R0)
/* irq */
BIC $(PsrMask), R2, R3
ORR $(0xd2), R3
MOVW R3, CPSR
MOVW SPSR, R11
MOVW R11, 64(R0)
MOVW R12, 68(R0)
MOVW R13, 72(R0)
MOVW R14, 76(R0)
/* und */
BIC $(PsrMask), R2, R3
ORR $(0xdb), R3
MOVW R3, CPSR
MOVW SPSR, R11
MOVW R11, 80(R0)
MOVW R12, 84(R0)
MOVW R13, 88(R0)
MOVW R14, 92(R0)
/* abt */
BIC $(PsrMask), R2, R3
ORR $(0xd7), R3
MOVW R3, CPSR
MOVW SPSR, R11
MOVW R11, 96(R0)
MOVW R12, 100(R0)
MOVW R13, 104(R0)
MOVW R14, 108(R0)
/* fiq */
BIC $(PsrMask), R2, R3
ORR $(0xd1), R3
MOVW R3, CPSR
MOVW SPSR, R7
MOVW R7, 112(R0)
MOVW R8, 116(R0)
MOVW R9, 120(R0)
MOVW R10,124(R0)
MOVW R11,128(R0)
MOVW R12,132(R0)
MOVW R13,136(R0)
MOVW R14,140(R0)
/* done */
MOVW R2, CPSR
MOVW R1, SPSR
MOVW $0, R0
RET
/* Entered after a resume from suspend state.
* The bootldr jumps here after a processor reset.
*/
TEXT power_resume(SB), $-4
MOVW $setR12(SB), R12 /* load the SB */
/* SVC mode, interrupts disabled */
MOVW $(PsrDirq|PsrDfiq|PsrMsvc), R1
MOVW R1, CPSR
/* gotopowerlabel() */
/* svc */
MOVW $power_state+0(SB), R0
MOVW 56(R0), R1 /* R1: SPSR, R2: CPSR */
MOVW 60(R0), R2
MOVW R1, SPSR
MOVW R2, CPSR
/* copro */
/* flush caches */
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0x7), 0
/* drain prefetch */
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
/* drain write buffer */
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0xa), 4
MCR CpMMU, 0, R0, C(CpTLBFlush), C(0x7)
MOVW 144(R0), R3
MCR CpMMU, 0, R3, C(CpDAC), C(0x0)
MOVW 148(R0), R3
MCR CpMMU, 0, R3, C(CpTTB), C(0x0)
MOVW 156(R0), R3
MCR CpMMU, 0, R3, C(CpFSR), C(0x0)
MOVW 160(R0), R3
MCR CpMMU, 0, R3, C(CpFAR), C(0x0)
MOVW 164(R0), R3
MCR CpMMU, 0, R3, C(CpPID), C(0x0)
MOVW 152(R0), R3
MCR CpMMU, 0, R3, C(CpControl), C(0x0) /* Enable cache */
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
/* flush i&d caches */
MCR CpMMU, 0, R0, C(CpCacheFlush), C(0x7), 0
/* flush tlb */
MCR CpMMU, 0, R0, C(CpTLBFlush), C(0x7), 0
/* drain prefetch */
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
/* usr */
BIC $(PsrMask), R2, R3
ORR $(0xdf), R3
MOVW 168(R0), R11
MOVW 172(R0), R12
MOVW 176(R0), R13
MOVW 180(R0), R14
MOVW R11, SPSR
/* irq */
BIC $(PsrMask), R2, R3
ORR $(0xd2), R3
MOVW R3, CPSR
MOVW 64(R0), R11
MOVW 68(R0), R12
MOVW 72(R0), R13
MOVW 76(R0), R14
MOVW R11, SPSR
/* und */
BIC $(PsrMask), R2, R3
ORR $(0xdb), R3
MOVW R3, CPSR
MOVW 80(R0), R11
MOVW 84(R0), R12
MOVW 88(R0), R13
MOVW 92(R0), R14
MOVW R11, SPSR
/* abt */
BIC $(PsrMask), R2, R3
ORR $(0xd7), R3
MOVW R3, CPSR
MOVW 96(R0), R11
MOVW 100(R0), R12
MOVW 104(R0), R13
MOVW 108(R0), R14
MOVW R11, SPSR
/* fiq */
BIC $(PsrMask), R2, R3
ORR $(0xd1), R3
MOVW R3, CPSR
MOVW 112(R0), R7
MOVW 116(R0), R8
MOVW 120(R0), R9
MOVW 124(R0), R10
MOVW 128(R0), R11
MOVW 132(R0), R12
MOVW 136(R0), R13
MOVW 140(R0), R14
MOVW R7, SPSR
/* svc */
MOVW 56(R0), R1
MOVW 60(R0), R2
MOVW R1, SPSR
MOVW R2, CPSR
MOVW 0(R0), R1
MOVW 4(R0), R2
MOVW 8(R0), R3
MOVW 12(R0),R4
MOVW 16(R0),R5
MOVW 20(R0),R6
MOVW 24(R0),R7
MOVW 28(R0),R8
MOVW 32(R0),R9
MOVW 36(R0),R10
MOVW 40(R0),R11
MOVW 44(R0),R12
MOVW 48(R0),R13
MOVW 52(R0),R14
RET
loop:
B loop
TEXT power_down(SB), $-4
TEXT sa1100_power_off<>+0(SB),$8
MOVW resetregs+0(SB),R7
MOVW gpioregs+0(SB),R6
MOVW memconfregs+0(SB),R5
MOVW powerregs+0(SB),R3
/* wakeup on power | rtc */
MOVW $(PWR_rtc|PWR_gpio0),R2
MOVW R2,0xc(R3)
/* clear reset status */
MOVW $(RCSR_all), R2
MOVW R2, 0x4(R7)
/* float */
MOVW $(PCFR_opde|PCFR_fp|PCFR_fs), R2
MOVW R2,0x10(R3)
/* sleep state */
MOVW $0,R2
MOVW R2,0x18(R3)
/* set resume address (pspr)*/
MOVW $resumeaddr+0(SB),R1
MOVW 0x0(R1), R2
MOVW R2,0x8(R3)
BL cacheflush(SB)
/* disable clock switching */
MCR CpPWR, 0, R1, C(CpTest), C(0x2), 2
/* adjust mem timing */
MOVW memconfregs+0(SB),R5
MOVW 0x1c(R5), R2
ORR $(MDREFR_k1db2), R2
MOVW R2, 0x1c(R5)
/* set PLL to lower speed w/ delay (ppcr = 0)*/
MOVW powerregs+0(SB),R3
MOVW $(120*206),R0
l11: SUB $1,R0
BGT l11
MOVW $0, R2
MOVW R2, 0x14(R3)
MOVW $(120*206),R0
l12: SUB $1,R0
BGT l12
/* setup registers for suspend procedure:
* 1. clear RT in mscx (R1, R7, R8)
* 2. clear DRI in mdrefr (R4)
* 3. set slfrsh in mdrefr (R6)
* 4. clear DE in mdcnfg (R9)
* 5. clear dram refresh (R10)
* 6. force sleep (R2)
*/
/* 1 */
MOVW 0x10(R5), R2
BIC $(MSC_rt), R2
MOVW R2, R1
MOVW 0x14(R5), R2
BIC $(MSC_rt), R2
MOVW R2, R7
MOVW 0x2c(R5), R2
BIC $(MSC_rt), R2
MOVW R2, R8
/* 2 */
MOVW 0x1c(R5), R2
BIC $(0xff00), R2
BIC $(0x00f0), R2
MOVW R2, R4
/* 3 */
ORR $(MDREFR_slfrsh), R2, R6
/* 4 */
MOVW 0x0(R5), R9
BIC $(MDCFNG_de), R9, R9
/* 5 */
MOVW R4, R2
BIC $(MDREFR_slfrsh), R2, R2
BIC $(MDREFR_e1pin), R2, R2
MOVW R2, R10
/* 6 */
MOVW $1,R2
TEXT power_magic(SB), $-4
/* power_code gets copied into the area of no-ops below,
* at a cache-line boundary (8 instructions)
*/
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
MOVW R0, R0
TEXT power_code(SB), $-4
/* Follow the procedure; this code gets copied to the no-op
* area preceding this code
*/
/* 1 */
MOVW R1, 0x10(R5)
MOVW R7, 0x14(R5)
MOVW R8, 0x2c(R5)
/* 2 */
MOVW R4, 0x1c(R5)
/* 3 */
MOVW R6, 0x1c(R5)
/* 4 */
MOVW R9, 0x0(R5)
/* 5 */
MOVW R10, 0x1c(R5)
/* 6 */
MOVW R2, 0x0(R3)
slloop:
B slloop /* loop waiting for sleep */
/* The first MCR instruction of this function needs to be on a cache-line
* boundary; to make this happen, it will be copied to the first cache-line
* boundary 8 words from the start of doze.
*
* Doze puts the machine into idle mode. Any interrupt will get it out
* at the next instruction (the RET, to be precise).
*/
TEXT doze(SB), $-4
MOVW $UCDRAMZERO, R1
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
MOVW R0,R0
RET
TEXT doze_code(SB), $-4
MCR CpPWR, 0, R0, C(CpTest), C(0x2), 2
MOVW (R1), R0
MCR CpPWR, 0, R0, C(CpTest), C(0x8), 2