From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 arch/mips/au1000/common/irq.c | 654 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 654 insertions(+)
 create mode 100644 arch/mips/au1000/common/irq.c

(limited to 'arch/mips/au1000/common/irq.c')

diff --git a/arch/mips/au1000/common/irq.c b/arch/mips/au1000/common/irq.c
new file mode 100644
index 000000000000..d1eb5a4a9a19
--- /dev/null
+++ b/arch/mips/au1000/common/irq.c
@@ -0,0 +1,654 @@
+/*
+ * BRIEF MODULE DESCRIPTION
+ *	Au1000 interrupt routines.
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *		ppopov@mvista.com or source@mvista.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.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED	  ``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 AUTHOR  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.
+ *
+ *  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.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/kernel_stat.h>
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/timex.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+
+#include <asm/bootinfo.h>
+#include <asm/io.h>
+#include <asm/mipsregs.h>
+#include <asm/system.h>
+#include <asm/mach-au1x00/au1000.h>
+#ifdef CONFIG_MIPS_PB1000
+#include <asm/mach-pb1x00/pb1000.h>
+#endif
+
+#undef DEBUG_IRQ
+#ifdef DEBUG_IRQ
+/* note: prints function name for you */
+#define DPRINTK(fmt, args...) printk("%s: " fmt, __FUNCTION__ , ## args)
+#else
+#define DPRINTK(fmt, args...)
+#endif
+
+#define EXT_INTC0_REQ0 2 /* IP 2 */
+#define EXT_INTC0_REQ1 3 /* IP 3 */
+#define EXT_INTC1_REQ0 4 /* IP 4 */
+#define EXT_INTC1_REQ1 5 /* IP 5 */
+#define MIPS_TIMER_IP  7 /* IP 7 */
+
+extern asmlinkage void au1000_IRQ(void);
+extern void set_debug_traps(void);
+extern irq_cpustat_t irq_stat [NR_CPUS];
+
+static void setup_local_irq(unsigned int irq, int type, int int_req);
+static unsigned int startup_irq(unsigned int irq);
+static void end_irq(unsigned int irq_nr);
+static inline void mask_and_ack_level_irq(unsigned int irq_nr);
+static inline void mask_and_ack_rise_edge_irq(unsigned int irq_nr);
+static inline void mask_and_ack_fall_edge_irq(unsigned int irq_nr);
+static inline void mask_and_ack_either_edge_irq(unsigned int irq_nr);
+inline void local_enable_irq(unsigned int irq_nr);
+inline void local_disable_irq(unsigned int irq_nr);
+
+void	(*board_init_irq)(void);
+
+#ifdef CONFIG_PM
+extern void counter0_irq(int irq, void *dev_id, struct pt_regs *regs);
+#endif
+
+static DEFINE_SPINLOCK(irq_lock);
+
+
+static unsigned int startup_irq(unsigned int irq_nr)
+{
+	local_enable_irq(irq_nr);
+	return 0;
+}
+
+
+static void shutdown_irq(unsigned int irq_nr)
+{
+	local_disable_irq(irq_nr);
+	return;
+}
+
+
+inline void local_enable_irq(unsigned int irq_nr)
+{
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		au_writel(1<<(irq_nr-32), IC1_MASKSET);
+		au_writel(1<<(irq_nr-32), IC1_WAKESET);
+	}
+	else {
+		au_writel(1<<irq_nr, IC0_MASKSET);
+		au_writel(1<<irq_nr, IC0_WAKESET);
+	}
+	au_sync();
+}
+
+
+inline void local_disable_irq(unsigned int irq_nr)
+{
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		au_writel(1<<(irq_nr-32), IC1_MASKCLR);
+		au_writel(1<<(irq_nr-32), IC1_WAKECLR);
+	}
+	else {
+		au_writel(1<<irq_nr, IC0_MASKCLR);
+		au_writel(1<<irq_nr, IC0_WAKECLR);
+	}
+	au_sync();
+}
+
+
+static inline void mask_and_ack_rise_edge_irq(unsigned int irq_nr)
+{
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		au_writel(1<<(irq_nr-32), IC1_RISINGCLR);
+		au_writel(1<<(irq_nr-32), IC1_MASKCLR);
+	}
+	else {
+		au_writel(1<<irq_nr, IC0_RISINGCLR);
+		au_writel(1<<irq_nr, IC0_MASKCLR);
+	}
+	au_sync();
+}
+
+
+static inline void mask_and_ack_fall_edge_irq(unsigned int irq_nr)
+{
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		au_writel(1<<(irq_nr-32), IC1_FALLINGCLR);
+		au_writel(1<<(irq_nr-32), IC1_MASKCLR);
+	}
+	else {
+		au_writel(1<<irq_nr, IC0_FALLINGCLR);
+		au_writel(1<<irq_nr, IC0_MASKCLR);
+	}
+	au_sync();
+}
+
+
+static inline void mask_and_ack_either_edge_irq(unsigned int irq_nr)
+{
+	/* This may assume that we don't get interrupts from
+	 * both edges at once, or if we do, that we don't care.
+	 */
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		au_writel(1<<(irq_nr-32), IC1_FALLINGCLR);
+		au_writel(1<<(irq_nr-32), IC1_RISINGCLR);
+		au_writel(1<<(irq_nr-32), IC1_MASKCLR);
+	}
+	else {
+		au_writel(1<<irq_nr, IC0_FALLINGCLR);
+		au_writel(1<<irq_nr, IC0_RISINGCLR);
+		au_writel(1<<irq_nr, IC0_MASKCLR);
+	}
+	au_sync();
+}
+
+
+static inline void mask_and_ack_level_irq(unsigned int irq_nr)
+{
+
+	local_disable_irq(irq_nr);
+	au_sync();
+#if defined(CONFIG_MIPS_PB1000)
+	if (irq_nr == AU1000_GPIO_15) {
+		au_writel(0x8000, PB1000_MDR); /* ack int */
+		au_sync();
+	}
+#endif
+	return;
+}
+
+
+static void end_irq(unsigned int irq_nr)
+{
+	if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS))) {
+		local_enable_irq(irq_nr);
+	}
+#if defined(CONFIG_MIPS_PB1000)
+	if (irq_nr == AU1000_GPIO_15) {
+		au_writel(0x4000, PB1000_MDR); /* enable int */
+		au_sync();
+	}
+#endif
+}
+
+unsigned long save_local_and_disable(int controller)
+{
+	int i;
+	unsigned long flags, mask;
+
+	spin_lock_irqsave(&irq_lock, flags);
+	if (controller) {
+		mask = au_readl(IC1_MASKSET);
+		for (i=32; i<64; i++) {
+			local_disable_irq(i);
+		}
+	}
+	else {
+		mask = au_readl(IC0_MASKSET);
+		for (i=0; i<32; i++) {
+			local_disable_irq(i);
+		}
+	}
+	spin_unlock_irqrestore(&irq_lock, flags);
+
+	return mask;
+}
+
+void restore_local_and_enable(int controller, unsigned long mask)
+{
+	int i;
+	unsigned long flags, new_mask;
+
+	spin_lock_irqsave(&irq_lock, flags);
+	for (i=0; i<32; i++) {
+		if (mask & (1<<i)) {
+			if (controller)
+				local_enable_irq(i+32);
+			else
+				local_enable_irq(i);
+		}
+	}
+	if (controller)
+		new_mask = au_readl(IC1_MASKSET);
+	else
+		new_mask = au_readl(IC0_MASKSET);
+
+	spin_unlock_irqrestore(&irq_lock, flags);
+}
+
+
+static struct hw_interrupt_type rise_edge_irq_type = {
+	"Au1000 Rise Edge",
+	startup_irq,
+	shutdown_irq,
+	local_enable_irq,
+	local_disable_irq,
+	mask_and_ack_rise_edge_irq,
+	end_irq,
+	NULL
+};
+
+static struct hw_interrupt_type fall_edge_irq_type = {
+	"Au1000 Fall Edge",
+	startup_irq,
+	shutdown_irq,
+	local_enable_irq,
+	local_disable_irq,
+	mask_and_ack_fall_edge_irq,
+	end_irq,
+	NULL
+};
+
+static struct hw_interrupt_type either_edge_irq_type = {
+	"Au1000 Rise or Fall Edge",
+	startup_irq,
+	shutdown_irq,
+	local_enable_irq,
+	local_disable_irq,
+	mask_and_ack_either_edge_irq,
+	end_irq,
+	NULL
+};
+
+static struct hw_interrupt_type level_irq_type = {
+	"Au1000 Level",
+	startup_irq,
+	shutdown_irq,
+	local_enable_irq,
+	local_disable_irq,
+	mask_and_ack_level_irq,
+	end_irq,
+	NULL
+};
+
+#ifdef CONFIG_PM
+void startup_match20_interrupt(void)
+{
+	local_enable_irq(AU1000_TOY_MATCH2_INT);
+}
+#endif
+
+static void setup_local_irq(unsigned int irq_nr, int type, int int_req)
+{
+	if (irq_nr > AU1000_MAX_INTR) return;
+	/* Config2[n], Config1[n], Config0[n] */
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		switch (type) {
+			case INTC_INT_RISE_EDGE: /* 0:0:1 */
+				au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
+				au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
+				au_writel(1<<(irq_nr-32), IC1_CFG0SET);
+				irq_desc[irq_nr].handler = &rise_edge_irq_type;
+				break;
+			case INTC_INT_FALL_EDGE: /* 0:1:0 */
+				au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
+				au_writel(1<<(irq_nr-32), IC1_CFG1SET);
+				au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
+				irq_desc[irq_nr].handler = &fall_edge_irq_type;
+				break;
+			case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */
+				au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
+				au_writel(1<<(irq_nr-32), IC1_CFG1SET);
+				au_writel(1<<(irq_nr-32), IC1_CFG0SET);
+				irq_desc[irq_nr].handler = &either_edge_irq_type;
+				break;
+			case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
+				au_writel(1<<(irq_nr-32), IC1_CFG2SET);
+				au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
+				au_writel(1<<(irq_nr-32), IC1_CFG0SET);
+				irq_desc[irq_nr].handler = &level_irq_type;
+				break;
+			case INTC_INT_LOW_LEVEL: /* 1:1:0 */
+				au_writel(1<<(irq_nr-32), IC1_CFG2SET);
+				au_writel(1<<(irq_nr-32), IC1_CFG1SET);
+				au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
+				irq_desc[irq_nr].handler = &level_irq_type;
+				break;
+			case INTC_INT_DISABLED: /* 0:0:0 */
+				au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
+				au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
+				au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
+				break;
+			default: /* disable the interrupt */
+				printk("unexpected int type %d (irq %d)\n", type, irq_nr);
+				au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
+				au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
+				au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
+				return;
+		}
+		if (int_req) /* assign to interrupt request 1 */
+			au_writel(1<<(irq_nr-32), IC1_ASSIGNCLR);
+		else	     /* assign to interrupt request 0 */
+			au_writel(1<<(irq_nr-32), IC1_ASSIGNSET);
+		au_writel(1<<(irq_nr-32), IC1_SRCSET);
+		au_writel(1<<(irq_nr-32), IC1_MASKCLR);
+		au_writel(1<<(irq_nr-32), IC1_WAKECLR);
+	}
+	else {
+		switch (type) {
+			case INTC_INT_RISE_EDGE: /* 0:0:1 */
+				au_writel(1<<irq_nr, IC0_CFG2CLR);
+				au_writel(1<<irq_nr, IC0_CFG1CLR);
+				au_writel(1<<irq_nr, IC0_CFG0SET);
+				irq_desc[irq_nr].handler = &rise_edge_irq_type;
+				break;
+			case INTC_INT_FALL_EDGE: /* 0:1:0 */
+				au_writel(1<<irq_nr, IC0_CFG2CLR);
+				au_writel(1<<irq_nr, IC0_CFG1SET);
+				au_writel(1<<irq_nr, IC0_CFG0CLR);
+				irq_desc[irq_nr].handler = &fall_edge_irq_type;
+				break;
+			case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */
+				au_writel(1<<irq_nr, IC0_CFG2CLR);
+				au_writel(1<<irq_nr, IC0_CFG1SET);
+				au_writel(1<<irq_nr, IC0_CFG0SET);
+				irq_desc[irq_nr].handler = &either_edge_irq_type;
+				break;
+			case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
+				au_writel(1<<irq_nr, IC0_CFG2SET);
+				au_writel(1<<irq_nr, IC0_CFG1CLR);
+				au_writel(1<<irq_nr, IC0_CFG0SET);
+				irq_desc[irq_nr].handler = &level_irq_type;
+				break;
+			case INTC_INT_LOW_LEVEL: /* 1:1:0 */
+				au_writel(1<<irq_nr, IC0_CFG2SET);
+				au_writel(1<<irq_nr, IC0_CFG1SET);
+				au_writel(1<<irq_nr, IC0_CFG0CLR);
+				irq_desc[irq_nr].handler = &level_irq_type;
+				break;
+			case INTC_INT_DISABLED: /* 0:0:0 */
+				au_writel(1<<irq_nr, IC0_CFG0CLR);
+				au_writel(1<<irq_nr, IC0_CFG1CLR);
+				au_writel(1<<irq_nr, IC0_CFG2CLR);
+				break;
+			default: /* disable the interrupt */
+				printk("unexpected int type %d (irq %d)\n", type, irq_nr);
+				au_writel(1<<irq_nr, IC0_CFG0CLR);
+				au_writel(1<<irq_nr, IC0_CFG1CLR);
+				au_writel(1<<irq_nr, IC0_CFG2CLR);
+				return;
+		}
+		if (int_req) /* assign to interrupt request 1 */
+			au_writel(1<<irq_nr, IC0_ASSIGNCLR);
+		else	     /* assign to interrupt request 0 */
+			au_writel(1<<irq_nr, IC0_ASSIGNSET);
+		au_writel(1<<irq_nr, IC0_SRCSET);
+		au_writel(1<<irq_nr, IC0_MASKCLR);
+		au_writel(1<<irq_nr, IC0_WAKECLR);
+	}
+	au_sync();
+}
+
+
+void __init arch_init_irq(void)
+{
+	int i;
+	unsigned long cp0_status;
+	au1xxx_irq_map_t *imp;
+	extern au1xxx_irq_map_t au1xxx_irq_map[];
+	extern au1xxx_irq_map_t au1xxx_ic0_map[];
+	extern int au1xxx_nr_irqs;
+	extern int au1xxx_ic0_nr_irqs;
+
+	cp0_status = read_c0_status();
+	memset(irq_desc, 0, sizeof(irq_desc));
+	set_except_vector(0, au1000_IRQ);
+
+	/* Initialize interrupt controllers to a safe state.
+	*/
+	au_writel(0xffffffff, IC0_CFG0CLR);
+	au_writel(0xffffffff, IC0_CFG1CLR);
+	au_writel(0xffffffff, IC0_CFG2CLR);
+	au_writel(0xffffffff, IC0_MASKCLR);
+	au_writel(0xffffffff, IC0_ASSIGNSET);
+	au_writel(0xffffffff, IC0_WAKECLR);
+	au_writel(0xffffffff, IC0_SRCSET);
+	au_writel(0xffffffff, IC0_FALLINGCLR);
+	au_writel(0xffffffff, IC0_RISINGCLR);
+	au_writel(0x00000000, IC0_TESTBIT);
+
+	au_writel(0xffffffff, IC1_CFG0CLR);
+	au_writel(0xffffffff, IC1_CFG1CLR);
+	au_writel(0xffffffff, IC1_CFG2CLR);
+	au_writel(0xffffffff, IC1_MASKCLR);
+	au_writel(0xffffffff, IC1_ASSIGNSET);
+	au_writel(0xffffffff, IC1_WAKECLR);
+	au_writel(0xffffffff, IC1_SRCSET);
+	au_writel(0xffffffff, IC1_FALLINGCLR);
+	au_writel(0xffffffff, IC1_RISINGCLR);
+	au_writel(0x00000000, IC1_TESTBIT);
+
+	/* Initialize IC0, which is fixed per processor.
+	*/
+	imp = au1xxx_ic0_map;
+	for (i=0; i<au1xxx_ic0_nr_irqs; i++) {
+		setup_local_irq(imp->im_irq, imp->im_type, imp->im_request);
+		imp++;
+	}
+
+	/* Now set up the irq mapping for the board.
+	*/
+	imp = au1xxx_irq_map;
+	for (i=0; i<au1xxx_nr_irqs; i++) {
+		setup_local_irq(imp->im_irq, imp->im_type, imp->im_request);
+		imp++;
+	}
+
+	set_c0_status(ALLINTS);
+
+	/* Board specific IRQ initialization.
+	*/
+	if (board_init_irq)
+		(*board_init_irq)();
+}
+
+
+/*
+ * Interrupts are nested. Even if an interrupt handler is registered
+ * as "fast", we might get another interrupt before we return from
+ * intcX_reqX_irqdispatch().
+ */
+
+void intc0_req0_irqdispatch(struct pt_regs *regs)
+{
+	int irq = 0;
+	static unsigned long intc0_req0 = 0;
+
+	intc0_req0 |= au_readl(IC0_REQ0INT);
+
+	if (!intc0_req0) return;
+
+	/*
+	 * Because of the tight timing of SETUP token to reply
+	 * transactions, the USB devices-side packet complete
+	 * interrupt needs the highest priority.
+	 */
+	if ((intc0_req0 & (1<<AU1000_USB_DEV_REQ_INT))) {
+		intc0_req0 &= ~(1<<AU1000_USB_DEV_REQ_INT);
+		do_IRQ(AU1000_USB_DEV_REQ_INT, regs);
+		return;
+	}
+
+	irq = au_ffs(intc0_req0) - 1;
+	intc0_req0 &= ~(1<<irq);
+	do_IRQ(irq, regs);
+}
+
+
+void intc0_req1_irqdispatch(struct pt_regs *regs)
+{
+	int irq = 0;
+	static unsigned long intc0_req1 = 0;
+
+	intc0_req1 |= au_readl(IC0_REQ1INT);
+
+	if (!intc0_req1) return;
+
+	irq = au_ffs(intc0_req1) - 1;
+	intc0_req1 &= ~(1<<irq);
+#ifdef CONFIG_PM
+	if (irq == AU1000_TOY_MATCH2_INT) {
+		mask_and_ack_rise_edge_irq(irq);
+		counter0_irq(irq, NULL, regs);
+		local_enable_irq(irq);
+	}
+	else
+#endif
+	{
+		do_IRQ(irq, regs);
+	}
+}
+
+
+/*
+ * Interrupt Controller 1:
+ * interrupts 32 - 63
+ */
+void intc1_req0_irqdispatch(struct pt_regs *regs)
+{
+	int irq = 0;
+	static unsigned long intc1_req0 = 0;
+
+	intc1_req0 |= au_readl(IC1_REQ0INT);
+
+	if (!intc1_req0) return;
+
+	irq = au_ffs(intc1_req0) - 1;
+	intc1_req0 &= ~(1<<irq);
+	irq += 32;
+	do_IRQ(irq, regs);
+}
+
+
+void intc1_req1_irqdispatch(struct pt_regs *regs)
+{
+	int irq = 0;
+	static unsigned long intc1_req1 = 0;
+
+	intc1_req1 |= au_readl(IC1_REQ1INT);
+
+	if (!intc1_req1) return;
+
+	irq = au_ffs(intc1_req1) - 1;
+	intc1_req1 &= ~(1<<irq);
+	irq += 32;
+	do_IRQ(irq, regs);
+}
+
+#ifdef CONFIG_PM
+
+/* Save/restore the interrupt controller state.
+ * Called from the save/restore core registers as part of the
+ * au_sleep function in power.c.....maybe I should just pm_register()
+ * them instead?
+ */
+static uint	sleep_intctl_config0[2];
+static uint	sleep_intctl_config1[2];
+static uint	sleep_intctl_config2[2];
+static uint	sleep_intctl_src[2];
+static uint	sleep_intctl_assign[2];
+static uint	sleep_intctl_wake[2];
+static uint	sleep_intctl_mask[2];
+
+void
+save_au1xxx_intctl(void)
+{
+	sleep_intctl_config0[0] = au_readl(IC0_CFG0RD);
+	sleep_intctl_config1[0] = au_readl(IC0_CFG1RD);
+	sleep_intctl_config2[0] = au_readl(IC0_CFG2RD);
+	sleep_intctl_src[0] = au_readl(IC0_SRCRD);
+	sleep_intctl_assign[0] = au_readl(IC0_ASSIGNRD);
+	sleep_intctl_wake[0] = au_readl(IC0_WAKERD);
+	sleep_intctl_mask[0] = au_readl(IC0_MASKRD);
+
+	sleep_intctl_config0[1] = au_readl(IC1_CFG0RD);
+	sleep_intctl_config1[1] = au_readl(IC1_CFG1RD);
+	sleep_intctl_config2[1] = au_readl(IC1_CFG2RD);
+	sleep_intctl_src[1] = au_readl(IC1_SRCRD);
+	sleep_intctl_assign[1] = au_readl(IC1_ASSIGNRD);
+	sleep_intctl_wake[1] = au_readl(IC1_WAKERD);
+	sleep_intctl_mask[1] = au_readl(IC1_MASKRD);
+}
+
+/* For most restore operations, we clear the entire register and
+ * then set the bits we found during the save.
+ */
+void
+restore_au1xxx_intctl(void)
+{
+	au_writel(0xffffffff, IC0_MASKCLR); au_sync();
+
+	au_writel(0xffffffff, IC0_CFG0CLR); au_sync();
+	au_writel(sleep_intctl_config0[0], IC0_CFG0SET); au_sync();
+	au_writel(0xffffffff, IC0_CFG1CLR); au_sync();
+	au_writel(sleep_intctl_config1[0], IC0_CFG1SET); au_sync();
+	au_writel(0xffffffff, IC0_CFG2CLR); au_sync();
+	au_writel(sleep_intctl_config2[0], IC0_CFG2SET); au_sync();
+	au_writel(0xffffffff, IC0_SRCCLR); au_sync();
+	au_writel(sleep_intctl_src[0], IC0_SRCSET); au_sync();
+	au_writel(0xffffffff, IC0_ASSIGNCLR); au_sync();
+	au_writel(sleep_intctl_assign[0], IC0_ASSIGNSET); au_sync();
+	au_writel(0xffffffff, IC0_WAKECLR); au_sync();
+	au_writel(sleep_intctl_wake[0], IC0_WAKESET); au_sync();
+	au_writel(0xffffffff, IC0_RISINGCLR); au_sync();
+	au_writel(0xffffffff, IC0_FALLINGCLR); au_sync();
+	au_writel(0x00000000, IC0_TESTBIT); au_sync();
+
+	au_writel(0xffffffff, IC1_MASKCLR); au_sync();
+
+	au_writel(0xffffffff, IC1_CFG0CLR); au_sync();
+	au_writel(sleep_intctl_config0[1], IC1_CFG0SET); au_sync();
+	au_writel(0xffffffff, IC1_CFG1CLR); au_sync();
+	au_writel(sleep_intctl_config1[1], IC1_CFG1SET); au_sync();
+	au_writel(0xffffffff, IC1_CFG2CLR); au_sync();
+	au_writel(sleep_intctl_config2[1], IC1_CFG2SET); au_sync();
+	au_writel(0xffffffff, IC1_SRCCLR); au_sync();
+	au_writel(sleep_intctl_src[1], IC1_SRCSET); au_sync();
+	au_writel(0xffffffff, IC1_ASSIGNCLR); au_sync();
+	au_writel(sleep_intctl_assign[1], IC1_ASSIGNSET); au_sync();
+	au_writel(0xffffffff, IC1_WAKECLR); au_sync();
+	au_writel(sleep_intctl_wake[1], IC1_WAKESET); au_sync();
+	au_writel(0xffffffff, IC1_RISINGCLR); au_sync();
+	au_writel(0xffffffff, IC1_FALLINGCLR); au_sync();
+	au_writel(0x00000000, IC1_TESTBIT); au_sync();
+
+	au_writel(sleep_intctl_mask[1], IC1_MASKSET); au_sync();
+
+	au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync();
+}
+#endif /* CONFIG_PM */
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