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31 lines
855 B
ArmAsm
31 lines
855 B
ArmAsm
// pmpcbo.S
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// David_Harris@hmc.edu 1/21/24
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// Cover PMP checks of cache management instructions
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#include "WALLY-init-lib.h"
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main:
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# set up PMP so user and supervisor mode can access partial address space
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li t0, 0x080F;
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# li t0, 0x0808;
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csrw pmpcfg0, t0 # configure PMP0 to TOR RWX and PMP1 to TOR no access
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li t0, 0x2003FFFF
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li t1, 0xFFFFFFFF
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csrw pmpaddr0, t0 # configure PMP0 top of range to 0x800FFFFF to allow all 32-bit addresses
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csrw pmpaddr1, t1 # configure PMP1 top of range to 0xFFFFFFFF to prohibit accesses above
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# enable cbo instructions
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li t0, 0xF0
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csrw menvcfg, t0
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csrw senvcfg, t0
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# switch to supervisor mode
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li a0, 1
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ecall
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# cbo instructions to PMP-forbidded address
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li a0, 0x81000000 # forbidden address
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cbo.zero (a0)
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cbo.inval (a0)
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j done |