MIPS: Loongson: Split common loongson source code out
To share common loongson source code between all of the loongson-based
machines. there is a need to split it out of the fuloong-2e/ directory.
at the same time, other according tuning is needed. the machine-specific
parts are defined as macros in relative header file, pci.h, mem.h,
machine.h.
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/loongson/common/irq.c b/arch/mips/loongson/common/irq.c
new file mode 100644
index 0000000..f368c73
--- /dev/null
+++ b/arch/mips/loongson/common/irq.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * 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.
+ */
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+
+#include <loongson.h>
+/*
+ * the first level int-handler will jump here if it is a bonito irq
+ */
+void bonito_irqdispatch(void)
+{
+ u32 int_status;
+ int i;
+
+ /* workaround the IO dma problem: let cpu looping to allow DMA finish */
+ int_status = BONITO_INTISR;
+ if (int_status & (1 << 10)) {
+ while (int_status & (1 << 10)) {
+ udelay(1);
+ int_status = BONITO_INTISR;
+ }
+ }
+
+ /* Get pending sources, masked by current enables */
+ int_status = BONITO_INTISR & BONITO_INTEN;
+
+ if (int_status != 0) {
+ i = __ffs(int_status);
+ int_status &= ~(1 << i);
+ do_IRQ(BONITO_IRQ_BASE + i);
+ }
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+ unsigned int pending;
+
+ pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+ /* machine-specific plat_irq_dispatch */
+ mach_irq_dispatch(pending);
+}
+
+void __init arch_init_irq(void)
+{
+ /*
+ * Clear all of the interrupts while we change the able around a bit.
+ * int-handler is not on bootstrap
+ */
+ clear_c0_status(ST0_IM | ST0_BEV);
+ local_irq_disable();
+
+ /* setting irq trigger mode */
+ set_irq_trigger_mode();
+
+ /* no steer */
+ BONITO_INTSTEER = 0;
+
+ /*
+ * Mask out all interrupt by writing "1" to all bit position in
+ * the interrupt reset reg.
+ */
+ BONITO_INTENCLR = ~0;
+
+ /* machine specific irq init */
+ mach_init_irq();
+}