1 files changed, 104 insertions, 0 deletions
diff --git a/nuttx/arch/z80/src/common/up_irq.c b/nuttx/arch/z80/src/common/up_irq.c
new file mode 100644
index 000000000..5f8897a41
--- /dev/null
+++ b/nuttx/arch/z80/src/common/up_irq.c
@@ -0,0 +1,104 @@
+/****************************************************************************
+ * common/up_irq.c
+ *
+ *   Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/irq.h>
+
+#include "up_internal.h"
+
+/****************************************************************************
+ * Private Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: irqsave
+ *
+ * Description:
+ *   Disable all interrupts; return previous interrupt state
+ *
+ ****************************************************************************/
+
+irqstate_t irqsave(void) __naked
+{
+  _asm
+	ld	a, i		; AF Carry bit holds interrupt state
+	di			; Interrupts are disabled
+	push	af		; Return AF in HL
+	pop	hl		;
+	ret			;
+  _endasm;
+}
+
+/****************************************************************************
+ * Name: irqrestore
+ *
+ * Description:
+ *   Restore previous interrupt state
+ *
+ ****************************************************************************/
+
+void irqrestore(irqstate_t flags) __naked
+{
+  _asm
+	pop	hl		; HL = return address
+	pop	af		; AF Carry bit hold interrupt state
+	jr	nc, statedisable
+	ei
+	ret
+statedisable:
+	di
+	ret
+  _endasm;
+}