diff options
| -rw-r--r-- | os/common/startup/ARMCAx-TZ/devices/SAMA5D2/boot.S | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/os/common/startup/ARMCAx-TZ/devices/SAMA5D2/boot.S b/os/common/startup/ARMCAx-TZ/devices/SAMA5D2/boot.S index 0ba357a0e..f8050f8c6 100644 --- a/os/common/startup/ARMCAx-TZ/devices/SAMA5D2/boot.S +++ b/os/common/startup/ARMCAx-TZ/devices/SAMA5D2/boot.S @@ -86,6 +86,15 @@ Boot_Handler: ldr r1, =SFR_L2CC_HRAMC str r0, [r1] /* + * Enabling Cycle counter + */ + mrc p15, 0, r0, c9, c12, 0 // read PMCR register + orr r0, r0, #(0x1) // set E bit 0 to enable counter + mcr p15, 0, r0, c9, c12, 0 // write r0 + mrc p15, 0, r0, c9, c12, 1 // read PMCNTENSET register + orr r0, r0, #(0x1 << 31) // set bit 31 to enable counter + mcr p15, 0, r0, c9, c12, 1 // write r0 + /* * Configure the intial catching of the interrupts */ ldr r0, =SCR_RESET_VAL // IRQ and ABT to monitor in secure mode |