that M-mode can emulate the freeze by setting sctrstatus.FROZEN=1 before invoking the registered handler routine. 11.6. Custom Extensions 12. Supervisor-Level ISA, Version 1.13 3.1. Machine-Level CSRs 00 11 XXXX 0x300-0x3FF Standard read/write 10 01 10XX 0x580-0x5BF Standard read/write 01 11 0XXX 0x700-0x77F Standard read/write debug CSRs 01 11 1010 0x7A0-0x7AF Standard read/write 01 10 11XX 0x6C0-0x6FF Custom read/write 11 11 10XX 0xF80-0xFBF Standard read-only 11 11 10XX 0xB80-0xBBF Standard read/write 10 01 11XX 0x9C0-0x9FF Custom read/write 10 10 11XX 0x6C0-0x6FF Custom read/write 10 10
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