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24 lines
710 B
ArmAsm
24 lines
710 B
ArmAsm
//go:build tamago && riscv64 && zisk
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#include "textflag.h"
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#define ARCH_ID_ZISK 0xFFFEEEE
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#define QEMU_EXIT_ADDR 0x100000
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#define QEMU_EXIT_CODE 0x5555
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// Shutdown triggers ZisK exit via ecall with a7=93
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TEXT ·Shutdown(SB),NOSPLIT|NOFRAME,$0
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// Read marchid CSR into A0 (CSRRS x10, 0xF12, x0)
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WORD $0xF1202573
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MOV $ARCH_ID_ZISK, A1 // Load ZisK arch ID
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BNE A0, A1, qemu_exit // If not, jump to qemu_exit
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MOV $93, A7 // CAUSE_EXIT = 93
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ECALL // System call to exit
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RET // Should never reach here
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qemu_exit:
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MOV $QEMU_EXIT_CODE, T0 // Load the exit code for QEMU
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MOV $QEMU_EXIT_ADDR, T1 // Load the exit address for QEMU
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ECALL // System call to exit QEMU
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RET // Should never reach here
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