ref: 8499401ada316f99d5ea8ef058ca1669468e6a7a
dir: /sys/src/9/ppc/l.s/
#include "mem.h" /* use of SPRG registers in save/restore */ #define SAVER0 SPRG0 #define SAVER1 SPRG1 #define SAVELR SPRG2 #define SAVEXX SPRG3 #ifdef ucuconf /* These only exist on the PPC 755: */ #define SAVER4 SPRG4 #define SAVER5 SPRG5 #define SAVER6 SPRG6 #define SAVER7 SPRG7 #endif /* ucuconf */ /* special instruction definitions */ #define BDNZ BC 16, 0, #define BDNE BC 0, 2, #define MTCRF(r, crm) WORD $((31<<26)|((r)<<21)|(crm<<12)|(144<<1)) /* #define TLBIA WORD $((31<<26)|(370<<1)) Not implemented on the 603e */ #define TLBSYNC WORD $((31<<26)|(566<<1)) #define TLBLI(n) WORD $((31<<26)|((n)<<11)|(1010<<1)) #define TLBLD(n) WORD $((31<<26)|((n)<<11)|(978<<1)) /* on some models mtmsr doesn't synchronise enough (eg, 603e) */ #define MSRSYNC SYNC #define UREGSPACE (UREGSIZE+8) TEXT start(SB), $-4 /* * setup MSR * turn off interrupts * use 0x000 as exception prefix * enable machine check */ MOVW MSR, R3 MOVW $(MSR_ME|MSR_EE|MSR_IP), R4 ANDN R4, R3 SYNC MOVW R3, MSR MSRSYNC /* except during trap handling, R0 is zero from now on */ MOVW $0, R0 /* setup SB for pre mmu */ MOVW $setSB(SB), R2 MOVW $KZERO, R3 ANDN R3, R2 /* before this we're not running above KZERO */ BL mmuinit0(SB) /* after this we are */ #ifdef ucuconf MOVW $0x2000000, R4 /* size */ MOVW $0, R3 /* base address */ RLWNM $0, R3, $~(CACHELINESZ-1), R5 CMP R4, $0 BLE _dcf1 SUB R5, R3 ADD R3, R4 ADD $(CACHELINESZ-1), R4 SRAW $CACHELINELOG, R4 MOVW R4, CTR _dcf0: DCBF (R5) ADD $CACHELINESZ, R5 BDNZ _dcf0 _dcf1: SYNC /* BAT0, 3 unused, copy of BAT2 */ MOVW SPR(IBATL(2)), R3 MOVW R3, SPR(IBATL(0)) MOVW SPR(IBATU(2)), R3 MOVW R3, SPR(IBATU(0)) MOVW SPR(DBATL(2)), R3 MOVW R3, SPR(DBATL(0)) MOVW SPR(DBATU(2)), R3 MOVW R3, SPR(DBATU(0)) MOVW SPR(IBATL(2)), R3 MOVW R3, SPR(IBATL(3)) MOVW SPR(IBATU(2)), R3 MOVW R3, SPR(IBATU(3)) MOVW SPR(DBATL(2)), R3 MOVW R3, SPR(DBATL(3)) MOVW SPR(DBATU(2)), R3 MOVW R3, SPR(DBATU(3)) #endif /* ucuconf */ /* running with MMU on!! */ /* set R2 to correct value */ MOVW $setSB(SB), R2 /* set up Mach */ MOVW $MACHADDR, R(MACH) ADD $(MACHSIZE-8), R(MACH), R1 /* set stack */ MOVW R0, R(USER) /* up-> set to zero */ MOVW R0, 0(R(MACH)) /* machno set to zero */ BL main(SB) RETURN /* not reached */ /* * on return from this function we will be running in virtual mode. * We set up the Block Address Translation (BAT) registers thus: * 1) first 3 BATs are 256M blocks, starting from KZERO->0 * 2) remaining BAT maps last 256M directly */ TEXT mmuinit0(SB), $0 /* reset all the tlbs */ MOVW $64, R3 MOVW R3, CTR MOVW $0, R4 tlbloop: TLBIE R4 SYNC ADD $BIT(19), R4 BDNZ tlbloop TLBSYNC #ifndef ucuconf /* BATs 0 and 1 cover memory from 0x00000000 to 0x20000000 */ /* KZERO -> 0, IBAT and DBAT, 256 MB */ MOVW $(KZERO|(0x7ff<<2)|2), R3 MOVW $(PTEVALID|PTEWRITE), R4 /* PTEVALID => Cache coherency on */ MOVW R3, SPR(IBATU(0)) MOVW R4, SPR(IBATL(0)) MOVW R3, SPR(DBATU(0)) MOVW R4, SPR(DBATL(0)) /* KZERO+256M -> 256M, IBAT and DBAT, 256 MB */ ADD $(1<<28), R3 ADD $(1<<28), R4 MOVW R3, SPR(IBATU(1)) MOVW R4, SPR(IBATL(1)) MOVW R3, SPR(DBATU(1)) MOVW R4, SPR(DBATL(1)) /* FPGABASE -> FPGABASE, DBAT, 16 MB */ MOVW $(FPGABASE|(0x7f<<2)|2), R3 MOVW $(FPGABASE|PTEWRITE|PTEUNCACHED), R4 /* FPGA memory, don't cache */ MOVW R3, SPR(DBATU(2)) MOVW R4, SPR(DBATL(2)) /* IBAT 2 unused */ MOVW R0, SPR(IBATU(2)) MOVW R0, SPR(IBATL(2)) /* direct map last block, uncached, (not guarded, doesn't work for BAT), DBAT only */ MOVW $(INTMEM|(0x7ff<<2)|2), R3 MOVW $(INTMEM|PTEWRITE|PTEUNCACHED), R4 /* Don't set PTEVALID here */ MOVW R3, SPR(DBATU(3)) MOVW R4, SPR(DBATL(3)) /* IBAT 3 unused */ MOVW R0, SPR(IBATU(3)) MOVW R0, SPR(IBATL(3)) #else /* ucuconf */ /* BAT 2 covers memory from 0x00000000 to 0x10000000 */ /* KZERO -> 0, IBAT2 and DBAT2, 256 MB */ MOVW $(KZERO|(0x7ff<<2)|2), R3 MOVW $(PTEVALID|PTEWRITE), R4 /* PTEVALID => Cache coherency on */ MOVW R3, SPR(DBATU(2)) MOVW R4, SPR(DBATL(2)) MOVW R3, SPR(IBATU(2)) MOVW R4, SPR(IBATL(2)) #endif /* ucuconf */ /* enable MMU */ MOVW LR, R3 OR $KZERO, R3 MOVW R3, SPR(SRR0) /* Stored PC for RFI instruction */ MOVW MSR, R4 OR $(MSR_IR|MSR_DR|MSR_RI|MSR_FP), R4 MOVW R4, SPR(SRR1) RFI /* resume in kernel mode in caller */ RETURN TEXT kfpinit(SB), $0 MOVFL $0, FPSCR(7) MOVFL $0xD, FPSCR(6) /* VE, OE, ZE */ MOVFL $0, FPSCR(5) MOVFL $0, FPSCR(3) MOVFL $0, FPSCR(2) MOVFL $0, FPSCR(1) MOVFL $0, FPSCR(0) FMOVD $4503601774854144.0, F27 FMOVD $0.5, F29 FSUB F29, F29, F28 FADD F29, F29, F30 FADD F30, F30, F31 FMOVD F28, F0 FMOVD F28, F1 FMOVD F28, F2 FMOVD F28, F3 FMOVD F28, F4 FMOVD F28, F5 FMOVD F28, F6 FMOVD F28, F7 FMOVD F28, F8 FMOVD F28, F9 FMOVD F28, F10 FMOVD F28, F11 FMOVD F28, F12 FMOVD F28, F13 FMOVD F28, F14 FMOVD F28, F15 FMOVD F28, F16 FMOVD F28, F17 FMOVD F28, F18 FMOVD F28, F19 FMOVD F28, F20 FMOVD F28, F21 FMOVD F28, F22 FMOVD F28, F23 FMOVD F28, F24 FMOVD F28, F25 FMOVD F28, F26 RETURN TEXT splhi(SB), $0 MOVW LR, R31 MOVW R31, 4(R(MACH)) /* save PC in m->splpc */ MOVW MSR, R3 RLWNM $0, R3, $~MSR_EE, R4 SYNC MOVW R4, MSR MSRSYNC RETURN TEXT splx(SB), $0 /* fall though */ TEXT splxpc(SB), $0 MOVW LR, R31 MOVW R31, 4(R(MACH)) /* save PC in m->splpc */ MOVW MSR, R4 RLWMI $0, R3, $MSR_EE, R4 SYNC MOVW R4, MSR MSRSYNC RETURN TEXT spllo(SB), $0 MOVW MSR, R3 OR $MSR_EE, R3, R4 SYNC MOVW R4, MSR MSRSYNC RETURN TEXT spldone(SB), $0 RETURN TEXT islo(SB), $0 MOVW MSR, R3 RLWNM $0, R3, $MSR_EE, R3 RETURN TEXT setlabel(SB), $-4 MOVW LR, R31 MOVW R1, 0(R3) MOVW R31, 4(R3) MOVW $0, R3 RETURN TEXT gotolabel(SB), $-4 MOVW 4(R3), R31 MOVW R31, LR MOVW 0(R3), R1 MOVW $1, R3 RETURN TEXT touser(SB), $-4 MOVW $(UTZERO+32), R5 /* header appears in text */ MOVW $(MSR_EE|MSR_PR|MSR_IR|MSR_DR|MSR_RI), R4 MOVW R4, SPR(SRR1) MOVW R3, R1 MOVW R5, SPR(SRR0) RFI TEXT dczap(SB), $-4 /* dczap(virtaddr, count) */ MOVW n+4(FP), R4 RLWNM $0, R3, $~(CACHELINESZ-1), R5 CMP R4, $0 BLE dcz1 SUB R5, R3 ADD R3, R4 ADD $(CACHELINESZ-1), R4 SRAW $CACHELINELOG, R4 MOVW R4, CTR dcz0: DCBI (R5) ADD $CACHELINESZ, R5 BDNZ dcz0 dcz1: SYNC RETURN TEXT dcflush(SB), $-4 /* dcflush(virtaddr, count) */ MOVW n+4(FP), R4 RLWNM $0, R3, $~(CACHELINESZ-1), R5 CMP R4, $0 BLE dcf1 SUB R5, R3 ADD R3, R4 ADD $(CACHELINESZ-1), R4 SRAW $CACHELINELOG, R4 MOVW R4, CTR dcf0: DCBST (R5) ADD $CACHELINESZ, R5 BDNZ dcf0 dcf1: SYNC RETURN TEXT icflush(SB), $-4 /* icflush(virtaddr, count) */ MOVW n+4(FP), R4 RLWNM $0, R3, $~(CACHELINESZ-1), R5 CMP R4, $0 BLE icf1 SUB R5, R3 ADD R3, R4 ADD $(CACHELINESZ-1), R4 SRAW $CACHELINELOG, R4 MOVW R4, CTR icf0: ICBI (R5) /* invalidate the instruction cache */ ADD $CACHELINESZ, R5 BDNZ icf0 ISYNC icf1: RETURN TEXT tas(SB), $0 TEXT _tas(SB), $0 MOVW R3, R4 MOVW $0xdead, R5 tas1: DCBF (R4) /* fix for 603x bug */ SYNC LWAR (R4), R3 CMP R3, $0 BNE tas0 STWCCC R5, (R4) BNE tas1 EIEIO tas0: SYNC RETURN TEXT tlbflushall(SB), $0 MOVW $TLBENTRIES, R3 MOVW R3, CTR MOVW $0, R4 ISYNC tlbflushall0: TLBIE R4 SYNC ADD $BIT(19), R4 BDNZ tlbflushall0 TLBSYNC RETURN TEXT tlbflush(SB), $0 ISYNC TLBIE R3 SYNC TLBSYNC RETURN TEXT gotopc(SB), $0 MOVW R3, CTR MOVW LR, R31 /* for trace back */ BR (CTR) /* On an imiss, we get here. If we can resolve it, we do. * Otherwise take the real trap. The code at the vector is * MOVW R0, SPR(SAVER0) No point to this, of course * MOVW LR, R0 * MOVW R0, SPR(SAVELR) * BL imiss(SB) or dmiss, as the case may be * BL tlbvec(SB) */ TEXT imiss(SB), $-4 /* Statistics */ MOVW $MACHPADDR, R1 MOVW 0xc(R1), R3 /* count m->tlbfault */ ADD $1, R3 MOVW R3, 0xc(R1) MOVW 0x10(R1), R3 /* count m->imiss */ ADD $1, R3 MOVW R3, 0x10(R1) /* Real work */ MOVW SPR(HASH1), R1 /* (phys) pointer into the hash table */ ADD $BY2PTEG, R1, R2 /* end pointer */ MOVW SPR(iCMP), R3 /* pattern to look for */ imiss1: MOVW (R1), R0 CMP R3, R0 BEQ imiss2 /* found the entry */ ADD $8, R1 CMP R1, R2 /* test end of loop */ BNE imiss1 /* Loop */ /* Failed to find an entry; take the full trap */ MOVW SPR(SRR1), R1 MTCRF(1, 0x80) /* restore CR0 bits (they're auto saved in SRR1) */ RETURN imiss2: /* Found the entry */ MOVW 4(R1), R2 /* Phys addr */ MOVW R2, SPR(RPA) MOVW SPR(IMISS), R3 TLBLI(3) /* Restore Registers */ MOVW SPR(SRR1), R1 /* Restore the CR0 field of the CR register from SRR1 */ MTCRF(1, 0x80) MOVW SPR(SAVELR), R0 MOVW R0, LR RFI /* On a data load or store miss, we get here. If we can resolve it, we do. * Otherwise take the real trap */ TEXT dmiss(SB), $-4 /* Statistics */ MOVW $MACHPADDR, R1 MOVW 0xc(R1), R3 /* count m->tlbfault */ ADD $1, R3 MOVW R3, 0xc(R1) MOVW 0x14(R1), R3 /* count m->dmiss */ ADD $1, R3 MOVW R3, 0x14(R1) /* Real work */ MOVW SPR(HASH1), R1 /* (phys) pointer into the hash table */ ADD $BY2PTEG, R1, R2 /* end pointer */ MOVW SPR(DCMP), R3 /* pattern to look for */ dmiss1: MOVW (R1), R0 CMP R3, R0 BEQ dmiss2 /* found the entry */ ADD $8, R1 CMP R1, R2 /* test end of loop */ BNE dmiss1 /* Loop */ /* Failed to find an entry; take the full trap */ MOVW SPR(SRR1), R1 MTCRF(1, 0x80) /* restore CR0 bits (they're auto saved in SRR1) */ RETURN dmiss2: /* Found the entry */ MOVW 4(R1), R2 /* Phys addr */ MOVW R2, SPR(RPA) MOVW SPR(DMISS), R3 TLBLD(3) /* Restore Registers */ MOVW SPR(SRR1), R1 /* Restore the CR0 field of the CR register from SRR1 */ MTCRF(1, 0x80) MOVW SPR(SAVELR), R0 MOVW R0, LR RFI /* * When a trap sets the TGPR bit (TLB miss traps do this), * registers get remapped: R0-R31 are temporarily inaccessible, * and Temporary Registers TR0-TR3 are mapped onto R0-R3. * While this bit is set, R4-R31 cannot be used. * The code at the vector has executed this code before * coming to tlbvec: * MOVW R0, SPR(SAVER0) No point to this, of course * MOVW LR, R0 * MOVW R0, SPR(SAVELR) * BL tlbvec(SB) * SAVER0 can be reused. We're not interested in the value of TR0 */ TEXT tlbvec(SB), $-4 MOVW MSR, R1 RLWNM $0, R1, $~MSR_TGPR, R1 /* Clear the dreaded TGPR bit in the MSR */ SYNC MOVW R1, MSR MSRSYNC /* Now the GPRs are what they're supposed to be, save R0 again */ MOVW R0, SPR(SAVER0) /* Fall through to trapvec */ /* * traps force memory mapping off. * the following code has been executed at the exception * vector location * MOVW R0, SPR(SAVER0) * MOVW LR, R0 * MOVW R0, SPR(SAVELR) * bl trapvec(SB) * */ TEXT trapvec(SB), $-4 MOVW LR, R0 MOVW R1, SPR(SAVER1) MOVW R0, SPR(SAVEXX) /* vector */ /* did we come from user space */ MOVW SPR(SRR1), R0 MOVW CR, R1 MOVW R0, CR BC 4, 17, ktrap /* switch to kernel stack */ MOVW R1, CR MOVW $MACHPADDR, R1 /* PADDR(m->) */ MOVW 8(R1), R1 /* m->proc */ RLWNM $0, R1, $~KZERO, R1 /* PADDR(m->proc) */ MOVW 8(R1), R1 /* m->proc->kstack */ RLWNM $0, R1, $~KZERO, R1 /* PADDR(m->proc->kstack) */ ADD $(KSTACK-UREGSIZE), R1 /* make room on stack */ BL saveureg(SB) BL trap(SB) BR restoreureg ktrap: MOVW R1, CR MOVW SPR(SAVER1), R1 RLWNM $0, R1, $~KZERO, R1 /* set stack pointer */ SUB $UREGSPACE, R1 BL saveureg(SB) /* addressed relative to PC */ BL trap(SB) BR restoreureg /* * enter with stack set and mapped. * on return, SB (R2) has been set, and R3 has the Ureg*, * the MMU has been re-enabled, kernel text and PC are in KSEG, * R(MACH) has been set, and R0 contains 0. * */ TEXT saveureg(SB), $-4 /* * save state */ MOVMW R2, 48(R1) /* save r2 .. r31 in 48(R1) .. 164(R1) */ MOVW $MACHPADDR, R(MACH) /* PADDR(m->) */ MOVW 8(R(MACH)), R(USER) /* up-> */ MOVW $MACHADDR, R(MACH) /* m-> */ MOVW SPR(SAVER1), R4 MOVW R4, 44(R1) MOVW SPR(SAVER0), R5 MOVW R5, 40(R1) MOVW CTR, R6 MOVW R6, 36(R1) MOVW XER, R4 MOVW R4, 32(R1) MOVW CR, R5 MOVW R5, 28(R1) MOVW SPR(SAVELR), R6 /* LR */ MOVW R6, 24(R1) /* pad at 20(R1) */ MOVW SPR(SRR0), R0 MOVW R0, 16(R1) /* old PC */ MOVW SPR(SRR1), R0 MOVW R0, 12(R1) /* old status */ MOVW SPR(SAVEXX), R0 MOVW R0, 8(R1) /* cause/vector */ MOVW SPR(DCMP), R0 MOVW R0, (160+8)(R1) MOVW SPR(iCMP), R0 MOVW R0, (164+8)(R1) MOVW SPR(DMISS), R0 MOVW R0, (168+8)(R1) MOVW SPR(IMISS), R0 MOVW R0, (172+8)(R1) MOVW SPR(HASH1), R0 MOVW R0, (176+8)(R1) MOVW SPR(HASH2), R0 MOVW R0, (180+8)(R1) MOVW SPR(DAR), R0 MOVW R0, (184+8)(R1) MOVW SPR(DSISR), R0 MOVW R0, (188+8)(R1) ADD $8, R1, R3 /* Ureg* */ OR $KZERO, R3 /* fix ureg */ STWCCC R3, (R1) /* break any pending reservations */ MOVW $0, R0 /* compiler/linker expect R0 to be zero */ MOVW $setSB(SB), R2 /* SB register */ MOVW MSR, R5 OR $(MSR_IR|MSR_DR|MSR_FP|MSR_RI), R5 /* enable MMU */ MOVW R5, SPR(SRR1) MOVW LR, R31 OR $KZERO, R31 /* return PC in KSEG0 */ MOVW R31, SPR(SRR0) OR $KZERO, R1 /* fix stack pointer */ RFI /* returns to trap handler */ /* * restore state from Ureg and return from trap/interrupt */ TEXT forkret(SB), $0 BR restoreureg restoreureg: MOVMW 48(R1), R2 /* restore r2 through r31 */ /* defer R1 */ MOVW 40(R1), R0 MOVW R0, SPR(SAVER0) /* resave saved R0 */ MOVW 36(R1), R0 MOVW R0, CTR MOVW 32(R1), R0 MOVW R0, XER MOVW 28(R1), R0 MOVW R0, CR /* Condition register*/ MOVW 24(R1), R0 MOVW R0, LR /* pad, skip */ MOVW 16(R1), R0 MOVW R0, SPR(SRR0) /* old PC */ MOVW 12(R1), R0 MOVW R0, SPR(SRR1) /* old MSR */ /* cause, skip */ MOVW 44(R1), R1 /* old SP */ MOVW SPR(SAVER0), R0 RFI TEXT getpvr(SB), $0 MOVW SPR(PVR), R3 RETURN TEXT getdec(SB), $0 MOVW SPR(DEC), R3 RETURN TEXT putdec(SB), $0 MOVW R3, SPR(DEC) RETURN TEXT getdar(SB), $0 MOVW SPR(DAR), R3 RETURN TEXT getdsisr(SB), $0 MOVW SPR(DSISR), R3 RETURN TEXT getmsr(SB), $0 MOVW MSR, R3 RETURN TEXT putmsr(SB), $0 MOVW R3, MSR MSRSYNC RETURN TEXT putsdr1(SB), $0 SYNC MOVW R3, SPR(SDR1) ISYNC RETURN TEXT putsr(SB), $0 MOVW 4(FP), R4 SYNC MOVW R4, SEG(R3) MSRSYNC RETURN TEXT getsr(SB), $0 MOVW SEG(R3), R3 RETURN TEXT gethid0(SB), $0 MOVW SPR(HID0), R3 RETURN TEXT puthid0(SB), $0 SYNC ISYNC MOVW R3, SPR(HID0) SYNC RETURN TEXT gethid1(SB), $0 MOVW SPR(HID1), R3 RETURN TEXT gethid2(SB), $0 MOVW SPR(HID2), R3 RETURN TEXT puthid2(SB), $0 MOVW R3, SPR(HID2) RETURN TEXT eieio(SB), $0 EIEIO RETURN TEXT sync(SB), $0 SYNC RETURN /* Power PC 603e specials */ TEXT getimiss(SB), $0 MOVW SPR(IMISS), R3 RETURN TEXT geticmp(SB), $0 MOVW SPR(iCMP), R3 RETURN TEXT puticmp(SB), $0 MOVW R3, SPR(iCMP) RETURN TEXT getdmiss(SB), $0 MOVW SPR(DMISS), R3 RETURN TEXT getdcmp(SB), $0 MOVW SPR(DCMP), R3 RETURN TEXT putdcmp(SB), $0 MOVW R3, SPR(DCMP) RETURN TEXT getsdr1(SB), $0 MOVW SPR(SDR1), R3 RETURN TEXT gethash1(SB), $0 MOVW SPR(HASH1), R3 RETURN TEXT puthash1(SB), $0 MOVW R3, SPR(HASH1) RETURN TEXT gethash2(SB), $0 MOVW SPR(HASH2), R3 RETURN TEXT puthash2(SB), $0 MOVW R3, SPR(HASH2) RETURN TEXT getrpa(SB), $0 MOVW SPR(RPA), R3 RETURN TEXT putrpa(SB), $0 MOVW R3, SPR(RPA) RETURN TEXT tlbli(SB), $0 TLBLI(3) ISYNC RETURN TEXT tlbld(SB), $0 SYNC TLBLD(3) ISYNC RETURN TEXT getsrr1(SB), $0 MOVW SPR(SRR1), R3 RETURN TEXT putsrr1(SB), $0 MOVW R3, SPR(SRR1) RETURN TEXT fpsave(SB), $0 FMOVD F0, (0*8)(R3) FMOVD F1, (1*8)(R3) FMOVD F2, (2*8)(R3) FMOVD F3, (3*8)(R3) FMOVD F4, (4*8)(R3) FMOVD F5, (5*8)(R3) FMOVD F6, (6*8)(R3) FMOVD F7, (7*8)(R3) FMOVD F8, (8*8)(R3) FMOVD F9, (9*8)(R3) FMOVD F10, (10*8)(R3) FMOVD F11, (11*8)(R3) FMOVD F12, (12*8)(R3) FMOVD F13, (13*8)(R3) FMOVD F14, (14*8)(R3) FMOVD F15, (15*8)(R3) FMOVD F16, (16*8)(R3) FMOVD F17, (17*8)(R3) FMOVD F18, (18*8)(R3) FMOVD F19, (19*8)(R3) FMOVD F20, (20*8)(R3) FMOVD F21, (21*8)(R3) FMOVD F22, (22*8)(R3) FMOVD F23, (23*8)(R3) FMOVD F24, (24*8)(R3) FMOVD F25, (25*8)(R3) FMOVD F26, (26*8)(R3) FMOVD F27, (27*8)(R3) FMOVD F28, (28*8)(R3) FMOVD F29, (29*8)(R3) FMOVD F30, (30*8)(R3) FMOVD F31, (31*8)(R3) MOVFL FPSCR, F0 FMOVD F0, (32*8)(R3) RETURN TEXT fprestore(SB), $0 FMOVD (32*8)(R3), F0 MOVFL F0, FPSCR FMOVD (0*8)(R3), F0 FMOVD (1*8)(R3), F1 FMOVD (2*8)(R3), F2 FMOVD (3*8)(R3), F3 FMOVD (4*8)(R3), F4 FMOVD (5*8)(R3), F5 FMOVD (6*8)(R3), F6 FMOVD (7*8)(R3), F7 FMOVD (8*8)(R3), F8 FMOVD (9*8)(R3), F9 FMOVD (10*8)(R3), F10 FMOVD (11*8)(R3), F11 FMOVD (12*8)(R3), F12 FMOVD (13*8)(R3), F13 FMOVD (14*8)(R3), F14 FMOVD (15*8)(R3), F15 FMOVD (16*8)(R3), F16 FMOVD (17*8)(R3), F17 FMOVD (18*8)(R3), F18 FMOVD (19*8)(R3), F19 FMOVD (20*8)(R3), F20 FMOVD (21*8)(R3), F21 FMOVD (22*8)(R3), F22 FMOVD (23*8)(R3), F23 FMOVD (24*8)(R3), F24 FMOVD (25*8)(R3), F25 FMOVD (26*8)(R3), F26 FMOVD (27*8)(R3), F27 FMOVD (28*8)(R3), F28 FMOVD (29*8)(R3), F29 FMOVD (30*8)(R3), F30 FMOVD (31*8)(R3), F31 RETURN TEXT dcacheenb(SB), $0 SYNC MOVW SPR(HID0), R4 /* Get HID0 and clear unwanted bits */ RLWNM $0, R4, $~(HID_DLOCK), R4 MOVW $(HID_DCFI|HID_DCE), R5 OR R4, R5 MOVW $HID_DCE, R3 OR R4, R3 SYNC // MOVW R5, SPR(HID0) /* Cache enable and flash invalidate */ MOVW R3, SPR(HID0) /* Cache enable */ SYNC RETURN TEXT icacheenb(SB), $0 SYNC MOVW SPR(HID0), R4 /* Get HID0 and clear unwanted bits */ RLWNM $0, R4, $~(HID_ILOCK), R4 MOVW $(HID_ICFI|HID_ICE), R5 OR R4, R5 MOVW $HID_ICE, R3 OR R4, R3 SYNC MOVW R5, SPR(HID0) /* Cache enable and flash invalidate */ MOVW R3, SPR(HID0) /* Cache enable */ SYNC RETURN #ifdef ucuconf TEXT getpll(SB), $0 MOVW SPR(1009), R3 ISYNC RETURN TEXT getl2pm(SB), $0 MOVW SPR(1016), R3 RETURN TEXT getl2cr(SB), $0 MOVW SPR(1017), R3 RETURN TEXT putl2cr(SB), $0 MOVW R3, SPR(1017) RETURN TEXT dcachedis(SB), $0 SYNC /* MOVW SPR(HID0), R4 RLWNM $0, R4, $~(HID_DCE), R4 MOVW R4, SPR(HID0) /* L1 Cache disable */ MOVW SPR(1017), R4 RLWNM $0, R4, $~(0x80000000), R4 MOVW R4, SPR(1017) /* L2 Cache disable */ SYNC RETURN TEXT l2disable(SB), $0 SYNC MOVW SPR(1017), R4 RLWNM $0, R4, $~(0x80000000), R4 MOVW R4, SPR(1017) /* L2 Cache disable */ SYNC RETURN TEXT getbats(SB), $0 MOVW SPR(DBATU(0)), R4 MOVW R4, 0(R3) MOVW SPR(DBATL(0)), R4 MOVW R4, 4(R3) MOVW SPR(IBATU(0)), R4 MOVW R4, 8(R3) MOVW SPR(IBATL(0)), R4 MOVW R4, 12(R3) MOVW SPR(DBATU(1)), R4 MOVW R4, 16(R3) MOVW SPR(DBATL(1)), R4 MOVW R4, 20(R3) MOVW SPR(IBATU(1)), R4 MOVW R4, 24(R3) MOVW SPR(IBATL(1)), R4 MOVW R4, 28(R3) MOVW SPR(DBATU(2)), R4 MOVW R4, 32(R3) MOVW SPR(DBATL(2)), R4 MOVW R4, 36(R3) MOVW SPR(IBATU(2)), R4 MOVW R4, 40(R3) MOVW SPR(IBATL(2)), R4 MOVW R4, 44(R3) MOVW SPR(DBATU(3)), R4 MOVW R4, 48(R3) MOVW SPR(DBATL(3)), R4 MOVW R4, 52(R3) MOVW SPR(IBATU(3)), R4 MOVW R4, 56(R3) MOVW SPR(IBATL(3)), R4 MOVW R4, 60(R3) RETURN TEXT setdbat0(SB), $0 MOVW 0(R3), R4 MOVW R4, SPR(DBATU(0)) MOVW 4(R3), R4 MOVW R4, SPR(DBATL(0)) RETURN #endif /* ucuconf */ TEXT mmudisable(SB), $0 /* disable MMU */ MOVW LR, R4 MOVW $KZERO, R5 ANDN R5, R4 MOVW R4, SPR(SRR0) /* Stored PC for RFI instruction */ MOVW MSR, R4 MOVW $(MSR_IR|MSR_DR|MSR_RI|MSR_FP), R5 ANDN R5, R4 MOVW R4, SPR(SRR1) MOVW SPR(HID0), R4 /* Get HID0 and clear unwanted bits */ MOVW $(HID_ICE|HID_DCE), R5 ANDN R5, R4 MOVW R4, SPR(HID0) /* Cache disable */ RFI /* resume caller with MMU off */ RETURN TEXT kreboot(SB), $0 BL mmudisable(SB) MOVW R3, LR RETURN TEXT mul64fract(SB), $0 MOVW a0+8(FP), R9 MOVW a1+4(FP), R10 MOVW b0+16(FP), R4 MOVW b1+12(FP), R5 MULLW R10, R5, R13 /* c2 = lo(a1*b1) */ MULLW R10, R4, R12 /* c1 = lo(a1*b0) */ MULHWU R10, R4, R7 /* hi(a1*b0) */ ADD R7, R13 /* c2 += hi(a1*b0) */ MULLW R9, R5, R6 /* lo(a0*b1) */ MULHWU R9, R5, R7 /* hi(a0*b1) */ ADDC R6, R12 /* c1 += lo(a0*b1) */ ADDE R7, R13 /* c2 += hi(a0*b1) + carry */ MULHWU R9, R4, R7 /* hi(a0*b0) */ ADDC R7, R12 /* c1 += hi(a0*b0) */ ADDE R0, R13 /* c2 += carry */ MOVW R12, 4(R3) MOVW R13, 0(R3) RETURN