From 9303b866bf36cfab8bdf3e2558f84e92ed4deec0 Mon Sep 17 00:00:00 2001
From: Christian Cunningham <cc@localhost>
Date: Thu, 24 Mar 2022 19:10:02 -0700
Subject: Unused counter
---
kernel/sys/kernel.S | 5 -----
usr/main.c | 4 ----
2 files changed, 9 deletions(-)
diff --git a/kernel/sys/kernel.S b/kernel/sys/kernel.S
index df55cc1..71b22a1 100644
--- a/kernel/sys/kernel.S
+++ b/kernel/sys/kernel.S
@@ -19,11 +19,6 @@ kernel_main:
mov r0, #0x80000000
mcr p15, 0, r0, c9, c12, 1
- // Allow access to CNTKCTL from PL0
- mrc p15, 0, r0, c14, c1, 0
- orr r0, #1
- mcr p15, 0, r0, c14, c1, 0
-
// Intentional undefined instruction
// .word 0xf7f0a000
cpsie ai, #0x10
diff --git a/usr/main.c b/usr/main.c
index 6eecc7c..56ddbcb 100644
--- a/usr/main.c
+++ b/usr/main.c
@@ -41,8 +41,4 @@ void main(void)
subscribe_irq(SYS_TIMER_2_IRQ, loopt, &stime_2);
subscribe_irq(SYS_TIMER_3_IRQ, loopt, &stime_3);
add_thread(loop, 0, 0);
- unsigned long long counter;
- asm volatile ("mrrc p15, 0, %0, c14" : "=r"(counter));
- draw_hex32(0, 20, counter>>32);
- draw_hex32(9, 20, counter);
}
--
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