summaryrefslogtreecommitdiff
path: root/cpu/at32ap/entry.S
diff options
context:
space:
mode:
Diffstat (limited to 'cpu/at32ap/entry.S')
-rw-r--r--cpu/at32ap/entry.S65
1 files changed, 65 insertions, 0 deletions
diff --git a/cpu/at32ap/entry.S b/cpu/at32ap/entry.S
new file mode 100644
index 0000000..b52d798
--- /dev/null
+++ b/cpu/at32ap/entry.S
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <asm/sysreg.h>
+#include <asm/ptrace.h>
+
+ .section .text.exception,"ax"
+ .global _evba
+ .type _evba,@function
+ .align 10
+_evba:
+ .irp x,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16
+ .align 2
+ rjmp unknown_exception
+ .endr
+
+ .global timer_interrupt_handler
+ .type timer_interrupt_handler,@function
+ .align 2
+timer_interrupt_handler:
+ /*
+ * Increment timer_overflow and re-write COMPARE with 0xffffffff.
+ *
+ * We're running at interrupt level 3, so we don't need to save
+ * r8-r12 or lr to the stack.
+ */
+ mov r8, lo(timer_overflow)
+ orh r8, hi(timer_overflow)
+ ld.w r9, r8[0]
+ mov r10, -1
+ mtsr SYSREG_COMPARE, r10
+ sub r9, -1
+ st.w r8[0], r9
+ rete
+
+ .type unknown_exception, @function
+unknown_exception:
+ pushm r0-r12
+ sub r8, sp, REG_R12 - REG_R0 - 4
+ mov r9, lr
+ mfsr r10, SYSREG_RAR_EX
+ mfsr r11, SYSREG_RSR_EX
+ pushm r8-r11
+ mfsr r12, SYSREG_ECR
+ mov r11, sp
+ rcall do_unknown_exception
+1: rjmp 1b