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authorTsiChung Liew <Tsi-Chung.Liew@freescale.com>2007-06-18 13:50:13 -0500
committerJohn Rigby <jrigby@freescale.com>2007-06-18 15:17:56 -0600
commit8e585f02f82c17cc66cd229dbf0fd3066bbbf658 (patch)
tree9483ff1f96ab9208eeac92101a5c6db855fcd2ee /lib_m68k/interrupts.c
parent9912121f7ed804ea58fd62f3f230b5dcfc357d88 (diff)
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Added M5329AFEE and M5329BFEE Platforms
Added board/freescale/m5329evb, cpu/mcf532x, drivers/net, drivers/serial, immap_5329.h, m5329.h, mcfrtc.h, include/configs/M5329EVB.h, lib_m68k/interrupts.c, and rtc/mcfrtc.c Modified CREDITS, MAKEFILE, Makefile, README, common/cmd_bdinfo.c, common/cmd_mii.c, include/asm-m68k/byteorder.h, include/asm-m68k/fec.h, include/asm-m68k/io.h, include/asm-m68k/mcftimer.h, include/asm-m68k/mcfuart.h, include/asm-m68k/ptrace.h, include/asm-m68k/u-boot.h, lib_m68k/Makefile, lib_m68k/board.c, lib_m68k/time.c, net/eth.c and rtc/Makefile Signed-off-by: TsiChung Liew <Tsi-Chung.Liew@freescale.com>
Diffstat (limited to 'lib_m68k/interrupts.c')
-rw-r--r--lib_m68k/interrupts.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/lib_m68k/interrupts.c b/lib_m68k/interrupts.c
new file mode 100644
index 0000000..6b3ce89
--- /dev/null
+++ b/lib_m68k/interrupts.c
@@ -0,0 +1,118 @@
+/*
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2007
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
+ *
+ * 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 <common.h>
+#include <watchdog.h>
+#include <asm/processor.h>
+
+#ifdef CONFIG_MCFINTC
+#define NR_IRQS (CFG_NUM_IRQS)
+
+/*
+ * Interrupt vector functions.
+ */
+struct interrupt_action {
+ interrupt_handler_t *handler;
+ void *arg;
+};
+
+static struct interrupt_action irq_vecs[NR_IRQS];
+
+static __inline__ unsigned short get_sr (void)
+{
+ unsigned short sr;
+
+ asm volatile ("move.w %%sr,%0":"=r" (sr):);
+
+ return sr;
+}
+
+static __inline__ void set_sr (unsigned short sr)
+{
+ asm volatile ("move.w %0,%%sr"::"r" (sr));
+}
+
+/************************************************************************/
+/*
+ * Install and free an interrupt handler
+ */
+void irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
+{
+ if ((vec < 0) || (vec > NR_IRQS)) {
+ printf ("irq_install_handler: wrong interrupt vector %d\n",
+ vec);
+ return;
+ }
+
+ irq_vecs[vec].handler = handler;
+ irq_vecs[vec].arg = arg;
+}
+
+void irq_free_handler (int vec)
+{
+ if ((vec < 0) || (vec > NR_IRQS)) {
+ return;
+ }
+
+ irq_vecs[vec].handler = NULL;
+ irq_vecs[vec].arg = NULL;
+}
+
+void enable_interrupts (void)
+{
+ unsigned short sr;
+
+ sr = get_sr ();
+ set_sr (sr & ~0x0700);
+}
+
+int disable_interrupts (void)
+{
+ unsigned short sr;
+
+ sr = get_sr ();
+ set_sr (sr | 0x0700);
+
+ return ((sr & 0x0700) == 0); /* return TRUE, if interrupts were enabled before */
+}
+
+void int_handler (struct pt_regs *fp)
+{
+ int vec;
+
+ vec = (fp->vector >> 2) & 0xff;
+ if (vec > 0x40)
+ vec -= 0x40;
+ else
+ return;
+
+ if (irq_vecs[vec].handler != NULL) {
+ irq_vecs[vec].handler (irq_vecs[vec].arg);
+ } else {
+ printf ("\nBogus External Interrupt Vector %d\n", vec);
+ }
+}
+#endif /* CONFIG_MCFINTC */ \ No newline at end of file