1 files changed, 121 insertions, 0 deletions
diff --git a/ports/AVR/chcore.c b/ports/AVR/chcore.c
new file mode 100644
index 000000000..7907de1dd
--- /dev/null
+++ b/ports/AVR/chcore.c
@@ -0,0 +1,121 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT 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 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <ch.h>
+
+#include <avr/io.h>
+
+void _IdleThread(void *p) {
+
+  while (TRUE) {
+//    asm("sleep");
+  }
+}
+
+/*
+ * Threads start code.
+ */
+void threadstart(void) {
+
+  asm volatile ("sei");
+  asm volatile ("movw    r24, r4");
+  asm volatile ("movw    r30, r2");
+  asm volatile ("icall");
+  asm volatile ("call    chThdExit");
+}
+
+/*
+ * Context switch.
+ */
+void chSysSwitchI(Thread *otp, Thread *ntp) {
+
+  asm volatile ("push    r2");
+  asm volatile ("push    r3");
+  asm volatile ("push    r4");
+  asm volatile ("push    r5");
+  asm volatile ("push    r6");
+  asm volatile ("push    r7");
+#ifndef CH_CURRP_REGISTER_CACHE
+  asm volatile ("push    r8");
+  asm volatile ("push    r9");
+#endif
+  asm volatile ("push    r10");
+  asm volatile ("push    r11");
+  asm volatile ("push    r12");
+  asm volatile ("push    r13");
+  asm volatile ("push    r14");
+  asm volatile ("push    r15");
+  asm volatile ("push    r16");
+  asm volatile ("push    r17");
+  asm volatile ("push    r28");
+  asm volatile ("push    r29");
+
+  asm volatile ("movw    r30, r24");
+  asm volatile ("in      r0, 0x3d");
+  asm volatile ("std     Z+8, r0");
+  asm volatile ("in      r0, 0x3e");
+  asm volatile ("std     Z+9, r0");
+
+  asm volatile ("movw    r30, r22");
+  asm volatile ("ldd     r0, Z+8");
+  asm volatile ("out     0x3d, r0");
+  asm volatile ("ldd     r0, Z+9");
+  asm volatile ("out     0x3e, r0");
+
+  asm volatile ("pop     r29");
+  asm volatile ("pop     r28");
+  asm volatile ("pop     r17");
+  asm volatile ("pop     r16");
+  asm volatile ("pop     r15");
+  asm volatile ("pop     r14");
+  asm volatile ("pop     r13");
+  asm volatile ("pop     r12");
+  asm volatile ("pop     r11");
+  asm volatile ("pop     r10");
+#ifndef CH_CURRP_REGISTER_CACHE
+  asm volatile ("pop     r9");
+  asm volatile ("pop     r8");
+#endif
+  asm volatile ("pop     r7");
+  asm volatile ("pop     r6");
+  asm volatile ("pop     r5");
+  asm volatile ("pop     r4");
+  asm volatile ("pop     r3");
+  asm volatile ("pop     r2");
+  asm volatile ("ret");
+}
+
+/*
+ * System console message (not implemented).
+ */
+__attribute__((weak))
+void chSysPuts(char *msg) {
+}
+
+/*
+ * System halt.
+ */
+__attribute__((noreturn, weak))
+void chSysHalt(void) {
+
+  chSysLock();
+
+  while (TRUE)
+    ;
+}