ref: 025a2d172ebfe36bc0da32f5712dd250916c73f1
dir: /sys/src/9/bcm64/rebootcode.s/
#include "mem.h" #include "../arm64/sysreg.h" #undef SYSREG #define SYSREG(op0,op1,Cn,Cm,op2) SPR(((op0)<<19|(op1)<<16|(Cn)<<12|(Cm)<<8|(op2)<<5)) TEXT _start(SB), 1, $-4 MOV $setSB(SB), R28 MRS MPIDR_EL1, R27 AND $(MPIDMASK), R27 LSL $3, R27 ADD $(SPINTABLE-KZERO), R27 CBZ R0, _mmuoff MOV R0, (R27) MOV code+8(FP), R1 MOVWU size+16(FP), R2 BIC $3, R2 ADD R1, R2, R3 _copy: MOVW (R1)4!, R4 MOVW R4, (R0)4! CMP R1, R3 BNE _copy BL cachedwbinv(SB) BL l2cacheuwbinv(SB) SEVL _mmuoff: ISB $SY MRS SCTLR_EL1, R0 BIC $(1<<0 | 1<<2 | 1<<12), R0 ISB $SY MSR R0, SCTLR_EL1 ISB $SY DSB $NSHST TLBI R0, 0,8,7,0 /* VMALLE1 */ DSB $NSH ISB $SY BL cachedwbinv(SB) BL cacheiinv(SB) MOVWU $0, R0 MOVWU $0, R1 MOVWU $0, R2 MOVWU $0, R3 _wait: WFE MOV (R27), LR CBZ LR, _wait RETURN