convert brcm-2.4 to the new target structure

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7092 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 130 insertions, 0 deletions

diff --git a/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/irq.c b/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/irq.c
new file mode 100644
index 000000000..698598b0d
--- /dev/null
+++ b/target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/irq.c
@@ -0,0 +1,130 @@
+/*
+ * Generic interrupt control functions for Broadcom MIPS boards
+ *
+ * Copyright 2004, Broadcom Corporation
+ * All Rights Reserved.
+ * 
+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
+ *
+ * $Id: irq.c,v 1.1 2005/03/16 13:50:00 wbx Exp $
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+#include <asm/irq.h>
+#include <asm/mipsregs.h>
+#include <asm/gdb-stub.h>
+
+#define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5)
+
+extern asmlinkage void brcmIRQ(void);
+extern asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs);
+
+void
+brcm_irq_dispatch(struct pt_regs *regs)
+{
+	u32 cause;
+
+	cause = read_c0_cause() &
+		read_c0_status() &
+		CAUSEF_IP;
+
+#ifdef CONFIG_KERNPROF
+	change_c0_status(cause | 1, 1);
+#else
+	clear_c0_status(cause);
+#endif
+
+	if (cause & CAUSEF_IP7)
+		do_IRQ(7, regs);
+	if (cause & CAUSEF_IP2)
+		do_IRQ(2, regs);
+	if (cause & CAUSEF_IP3)
+		do_IRQ(3, regs);
+	if (cause & CAUSEF_IP4)
+		do_IRQ(4, regs);
+	if (cause & CAUSEF_IP5)
+		do_IRQ(5, regs);
+	if (cause & CAUSEF_IP6)
+		do_IRQ(6, regs);
+}
+
+static void
+enable_brcm_irq(unsigned int irq)
+{
+	if (irq < 8)
+		set_c0_status(1 << (irq + 8));
+	else
+		set_c0_status(IE_IRQ0);
+}
+
+static void
+disable_brcm_irq(unsigned int irq)
+{
+	if (irq < 8)
+		clear_c0_status(1 << (irq + 8));
+	else
+		clear_c0_status(IE_IRQ0);
+}
+
+static void
+ack_brcm_irq(unsigned int irq)
+{
+	/* Already done in brcm_irq_dispatch */
+}
+
+static unsigned int
+startup_brcm_irq(unsigned int irq)
+{ 
+	enable_brcm_irq(irq);
+
+	return 0; /* never anything pending */
+}
+
+static void
+end_brcm_irq(unsigned int irq)
+{
+	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+		enable_brcm_irq(irq);
+}
+
+static struct hw_interrupt_type brcm_irq_type = {
+	typename: "MIPS",
+	startup: startup_brcm_irq,
+	shutdown: disable_brcm_irq,
+	enable: enable_brcm_irq,
+	disable: disable_brcm_irq,
+	ack: ack_brcm_irq,
+	end: end_brcm_irq,
+	NULL
+};
+
+void __init
+init_IRQ(void)
+{
+	int i;
+
+	for (i = 0; i < NR_IRQS; i++) {
+		irq_desc[i].status = IRQ_DISABLED;
+		irq_desc[i].action = 0;
+		irq_desc[i].depth = 1;
+		irq_desc[i].handler = &brcm_irq_type;
+	}
+
+    	set_except_vector(0, brcmIRQ);
+	change_c0_status(ST0_IM, ALLINTS);
+
+#ifdef CONFIG_REMOTE_DEBUG
+	printk("Breaking into debugger...\n");
+	set_debug_traps();
+	breakpoint(); 
+#endif
+}