mirror of
https://github.com/openhwgroup/cvw
synced 2025-01-23 13:04:28 +00:00
32 lines
848 B
ArmAsm
32 lines
848 B
ArmAsm
# pmpcbo.S
|
|
# David_Harris@hmc.edu 1/21/24
|
|
# Cover PMP checks of cache management instructions
|
|
|
|
#include "WALLY-init-lib.h"
|
|
main:
|
|
|
|
# set up PMP so user and supervisor mode can access partial address space
|
|
li t0, 0x080F;
|
|
# li t0, 0x0808;
|
|
csrw pmpcfg0, t0 # configure PMP0 to TOR RWX and PMP1 to TOR no access
|
|
li t0, 0x2003FFFF
|
|
li t1, 0xFFFFFFFF
|
|
csrw pmpaddr0, t0 # configure PMP0 top of range to 0x800FFFFF to allow all 32-bit addresses
|
|
csrw pmpaddr1, t1 # configure PMP1 top of range to 0xFFFFFFFF to prohibit accesses above
|
|
|
|
# enable cbo instructions
|
|
li t0, 0xF0
|
|
csrw menvcfg, t0
|
|
csrw senvcfg, t0
|
|
|
|
# switch to supervisor mode
|
|
li a0, 1
|
|
ecall
|
|
|
|
# cbo instructions to PMP-forbidded address
|
|
li a0, 0x81000000 # forbidden address
|
|
cbo.zero (a0)
|
|
cbo.inval (a0)
|
|
|
|
j done
|