lm3s1968: implement the IRQ manager.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@3277 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/cpu/cortex-m3/drv/irq.c b/bertos/cpu/cortex-m3/drv/irq.c
new file mode 100644 (file)
index 0000000..0da77c8
--- /dev/null
+++ b/bertos/cpu/cortex-m3/drv/irq.c
@@ -0,0 +1,86 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief Cortex-M3 IRQ management.
+ *
+ * \author Andrea Righi <arighi@develer.com>
+ */
+
+#include <cfg/debug.h>
+#include <cpu/irq.h>
+#include "io/lm3s.h"
+#include "irq.h"
+
+static void (*irq_table[NUM_INTERRUPTS])(void)
+                       __attribute__((section("vtable")));
+
+static void unhandled_isr(void)
+{
+       /* Unhandled IRQ */
+       ASSERT(0);
+}
+
+void sysirq_setHandler(sysirq_t irq, sysirq_handler_t handler)
+{
+       cpu_flags_t flags;
+
+       ASSERT(irq < NUM_INTERRUPTS);
+
+       IRQ_SAVE_DISABLE(flags);
+       irq_table[irq] = handler;
+       IRQ_RESTORE(flags);
+}
+
+void sysirq_freeHandler(sysirq_t irq)
+{
+       cpu_flags_t flags;
+
+       ASSERT(irq < NUM_INTERRUPTS);
+
+       IRQ_SAVE_DISABLE(flags);
+       irq_table[irq] = unhandled_isr;
+       IRQ_RESTORE(flags);
+}
+
+void sysirq_init(void)
+{
+       cpu_flags_t flags;
+       int i;
+
+       IRQ_SAVE_DISABLE(flags);
+       for (i = 0; i < NUM_INTERRUPTS; i++)
+               irq_table[i] = unhandled_isr;
+
+       /* Update NVIC to point to the new vector table */
+       HWREG(NVIC_VTABLE) = (size_t)irq_table;
+       IRQ_RESTORE(flags);
+}

diff --git a/bertos/cpu/cortex-m3/drv/irq.h b/bertos/cpu/cortex-m3/drv/irq.h
new file mode 100644 (file)
index 0000000..1770ed1
--- /dev/null
+++ b/bertos/cpu/cortex-m3/drv/irq.h
@@ -0,0 +1,49 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief IRQ management for the Cortex M3 processor.
+ *
+ * \author Andrea Righi <arighi@develer.com>
+ */
+
+#ifndef DRV_CORTEX_M3_SYSIRQ_H
+#define DRV_CORTEX_M3_SYSIRQ_H
+
+typedef void (*sysirq_handler_t)(void);
+typedef unsigned int sysirq_t;
+
+void sysirq_setHandler(sysirq_t irq, sysirq_handler_t handler);
+void sysirq_freeHandler(sysirq_t irq);
+
+void sysirq_init(void);
+
+#endif /* DRV_CORTEX_M3_SYSIRQ_H */