More AP / SP bits for the 34K, the Malta bits and things. Still wants

a little polishing.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Kconfig

@@ -13,6 +13,22 @@ mainmenu "Linux/MIPS Kernel Configuration"
 
 source "init/Kconfig"
 
+config CPU_MIPS32
+	bool
+	default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
+
+config CPU_MIPS64
+	bool
+	default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
+
+config CPU_MIPSR1
+	bool
+	default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
+
+config CPU_MIPSR2
+	bool
+	default y if CPU_MIPS32_R2 || CPU_MIPS64_R2
+
 config SYS_SUPPORTS_32BIT_KERNEL
 	bool
 config SYS_SUPPORTS_64BIT_KERNEL
@@ -233,6 +249,7 @@ config MIPS_EV64120
 	bool "Support for Galileo EV64120 Evaluation board (EXPERIMENTAL)"
 	depends on EXPERIMENTAL
 	select DMA_NONCOHERENT
+	select IRQ_CPU
 	select HW_HAS_PCI
 	select MIPS_GT64120
 	select SYS_SUPPORTS_32BIT_KERNEL
@@ -344,6 +361,7 @@ config MIPS_MALTA
 	select BOOT_ELF32
 	select HAVE_STD_PC_SERIAL_PORT
 	select DMA_NONCOHERENT
+	select IRQ_CPU
 	select GENERIC_ISA_DMA
 	select HW_HAS_PCI
 	select I8259
@@ -1277,6 +1295,31 @@ config CPU_HAS_PREFETCH
 	bool "Enable prefetches" if CPU_SB1 && !CPU_SB1_PASS_2
 	default y if CPU_MIPS32 || CPU_MIPS64 || CPU_RM7000 || CPU_RM9000 || CPU_R10000
 
+config MIPS_MT
+	bool "Enable MIPS MT"
+
+config MIPS_VPE_LOADER
+	bool "VPE loader support."
+	depends on MIPS_MT
+	help
+	  Includes a loader for loading an elf relocatable object
+	  onto another VPE and running it.
+
+config MIPS_VPE_LOADER_TOM
+	bool "Load VPE program into memory hidden from linux"
+	depends on MIPS_VPE_LOADER
+	default y
+	help
+	  The loader can use memory that is present but has been hidden from
+	  Linux using the kernel command line option "mem=xxMB". It's up to
+	  you to ensure the amount you put in the option and the space your
+	  program requires is less or equal to the amount physically present.
+
+# this should possibly be in drivers/char, but it is rather cpu related. Hmmm
+config MIPS_VPE_APSP_API
+      bool "Enable support for AP/SP API (RTLX)"
+      depends on MIPS_VPE_LOADER
+
 config VTAG_ICACHE
 	bool "Support for Virtual Tagged I-cache" if CPU_MIPS64 || CPU_MIPS32
 	default y if CPU_SB1
@@ -1335,6 +1378,35 @@ config CPU_HAS_WB
 	  machines which require flushing of write buffers in software.  Saying
 	  Y is the safe option; N may result in kernel malfunction and crashes.
 
+menu "MIPSR2 Interrupt handling"
+	depends on CPU_MIPSR2 && CPU_ADVANCED
+
+config CPU_MIPSR2_IRQ_VI
+	bool "Vectored interrupt mode"
+	help
+	   Vectored interrupt mode allowing faster dispatching of interrupts.
+	   The board support code needs to be written to take advantage of this
+	   mode.  Compatibility code is included to allow the kernel to run on
+	   a CPU that does not support vectored interrupts.  It's safe to
+	   say Y here.
+
+config CPU_MIPSR2_IRQ_EI
+	bool "External interrupt controller mode"
+	help
+	   Extended interrupt mode takes advantage of an external interrupt
+	   controller to allow fast dispatching from many possible interrupt
+	   sources. Say N unless you know that external interrupt support is
+	   required.
+
+config CPU_MIPSR2_SRS
+	bool "Make shadow set registers available for interrupt handlers"
+	depends on CPU_MIPSR2_IRQ_VI || CPU_MIPSR2_IRQ_EI
+	help
+	   Allow the kernel to use shadow register sets for fast interrupts.
+	   Interrupt handlers must be specially written to use shadow sets.
+	   Say N unless you know that shadow register set upport is needed.
+endmenu
+
 config CPU_HAS_SYNC
 	bool
 	depends on !CPU_R3000

arch/mips/kernel/Makefile

@@ -34,12 +34,16 @@ obj-$(CONFIG_CPU_R6000)		+= r6000_fpu.o r4k_switch.o
 
 obj-$(CONFIG_SMP)		+= smp.o
 
+obj-$(CONFIG_MIPS_VPE_LOADER)	+= vpe.o
+obj-$(CONFIG_MIPS_VPE_APSP_API)	+= rtlx.o
+
 obj-$(CONFIG_NO_ISA)		+= dma-no-isa.o
 obj-$(CONFIG_I8259)		+= i8259.o
 obj-$(CONFIG_IRQ_CPU)		+= irq_cpu.o
 obj-$(CONFIG_IRQ_CPU_RM7K)	+= irq-rm7000.o
 obj-$(CONFIG_IRQ_CPU_RM9K)	+= irq-rm9000.o
 obj-$(CONFIG_IRQ_MV64340)	+= irq-mv6434x.o
+obj-$(CONFIG_MIPS_BOARDS_GEN)	+= irq-msc01.o
 
 obj-$(CONFIG_32BIT)		+= scall32-o32.o
 obj-$(CONFIG_64BIT)		+= scall64-64.o

arch/mips/kernel/genex.S

@@ -147,6 +147,38 @@ NESTED(except_vec_ejtag_debug, 0, sp)
 
 	__FINIT
 
+/*
+ * Vectored interrupt handler.
+ * This prototype is copied to ebase + n*IntCtl.VS and patched
+ * to invoke the handler
+ */
+NESTED(except_vec_vi, 0, sp)
+	SAVE_SOME
+	SAVE_AT
+	.set	push
+	.set	noreorder
+EXPORT(except_vec_vi_lui)
+	lui	v0, 0		/* Patched */
+	j	except_vec_vi_handler
+EXPORT(except_vec_vi_ori)
+	 ori	v0, 0		/* Patched */
+	.set	pop
+	END(except_vec_vi)
+EXPORT(except_vec_vi_end)
+
+/*
+ * Common Vectored Interrupt code
+ * Complete the register saves and invoke the handler which is passed in $v0
+ */
+NESTED(except_vec_vi_handler, 0, sp)
+	SAVE_TEMP
+	SAVE_STATIC
+	CLI
+	move	a0, sp
+	jalr	v0
+	j	ret_from_irq
+	END(except_vec_vi_handler)
+
 /*
  * EJTAG debug exception handler.
  */

arch/mips/kernel/irq-msc01.c

@@ -74,7 +74,7 @@ static void disable_msc_irq(unsigned int irq)
 static void level_mask_and_ack_msc_irq(unsigned int irq)
 {
 	mask_msc_irq(irq);
-	if (!cpu_has_ei)
+	if (!cpu_has_veic)
 		MSCIC_WRITE(MSC01_IC_EOI, 0);
 }
 
@@ -84,7 +84,7 @@ static void level_mask_and_ack_msc_irq(unsigned int irq)
 static void edge_mask_and_ack_msc_irq(unsigned int irq)
 {
 	mask_msc_irq(irq);
-	if (!cpu_has_ei)
+	if (!cpu_has_veic)
 		MSCIC_WRITE(MSC01_IC_EOI, 0);
 	else {
 		u32 r;
@@ -166,14 +166,14 @@ void __init init_msc_irqs(unsigned int base, msc_irqmap_t *imp, int nirq)
 		switch (imp->im_type) {
 		case MSC01_IRQ_EDGE:
 			irq_desc[base+n].handler = &msc_edgeirq_type;
-			if (cpu_has_ei)
+			if (cpu_has_veic)
 				MSCIC_WRITE(MSC01_IC_SUP+n*8, MSC01_IC_SUP_EDGE_BIT);
 			else
 				MSCIC_WRITE(MSC01_IC_SUP+n*8, MSC01_IC_SUP_EDGE_BIT | imp->im_lvl);
 			break;
 		case MSC01_IRQ_LEVEL:
 			irq_desc[base+n].handler = &msc_levelirq_type;
-			if (cpu_has_ei)
+			if (cpu_has_veic)
 				MSCIC_WRITE(MSC01_IC_SUP+n*8, 0);
 			else
 				MSCIC_WRITE(MSC01_IC_SUP+n*8, imp->im_lvl);

arch/mips/kernel/rtlx.c

+/*
+ * Copyright (C) 2005 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope 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 <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/vmalloc.h>
+#include <linux/elf.h>
+#include <linux/seq_file.h>
+#include <linux/syscalls.h>
+#include <linux/moduleloader.h>
+#include <linux/interrupt.h>
+#include <linux/poll.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <asm/mipsmtregs.h>
+#include <asm/cacheflush.h>
+#include <asm/atomic.h>
+#include <asm/cpu.h>
+#include <asm/processor.h>
+#include <asm/system.h>
+#include <asm/rtlx.h>
+
+#define RTLX_MAJOR 64
+#define RTLX_TARG_VPE 1
+
+struct rtlx_info *rtlx;
+static int major;
+static char module_name[] = "rtlx";
+static inline int spacefree(int read, int write, int size);
+
+static struct chan_waitqueues {
+	wait_queue_head_t rt_queue;
+	wait_queue_head_t lx_queue;
+} channel_wqs[RTLX_CHANNELS];
+
+static struct irqaction irq;
+static int irq_num;
+
+extern void *vpe_get_shared(int index);
+
+static void rtlx_dispatch(struct pt_regs *regs)
+{
+	do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ, regs);
+}
+
+irqreturn_t rtlx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	irqreturn_t r = IRQ_HANDLED;
+	int i;
+
+	for (i = 0; i < RTLX_CHANNELS; i++) {
+		struct rtlx_channel *chan = &rtlx->channel[i];
+
+		if (chan->lx_read != chan->lx_write)
+			wake_up_interruptible(&channel_wqs[i].lx_queue);
+	}
+
+	return r;
+}
+
+void dump_rtlx(void)
+{
+	int i;
+
+	printk("id 0x%lx state %d\n", rtlx->id, rtlx->state);
+
+	for (i = 0; i < RTLX_CHANNELS; i++) {
+		struct rtlx_channel *chan = &rtlx->channel[i];
+
+		printk(" rt_state %d lx_state %d buffer_size %d\n",
+		       chan->rt_state, chan->lx_state, chan->buffer_size);
+
+		printk(" rt_read %d rt_write %d\n",
+		       chan->rt_read, chan->rt_write);
+
+		printk(" lx_read %d lx_write %d\n",
+		       chan->lx_read, chan->lx_write);
+
+		printk(" rt_buffer <%s>\n", chan->rt_buffer);
+		printk(" lx_buffer <%s>\n", chan->lx_buffer);
+	}
+}
+
+/* call when we have the address of the shared structure from the SP side. */
+static int rtlx_init(struct rtlx_info *rtlxi)
+{
+	int i;
+
+	if (rtlxi->id != RTLX_ID) {
+		printk(KERN_WARNING "no valid RTLX id at 0x%p\n", rtlxi);
+		return (-ENOEXEC);
+	}
+
+	/* initialise the wait queues */
+	for (i = 0; i < RTLX_CHANNELS; i++) {
+		init_waitqueue_head(&channel_wqs[i].rt_queue);
+		init_waitqueue_head(&channel_wqs[i].lx_queue);
+	}
+
+	/* set up for interrupt handling */
+	memset(&irq, 0, sizeof(struct irqaction));
+
+	if (cpu_has_vint) {
+		set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch);
+	}
+
+	irq_num = MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ;
+	irq.handler = rtlx_interrupt;
+	irq.flags = SA_INTERRUPT;
+	irq.name = "RTLX";
+	irq.dev_id = rtlx;
+	setup_irq(irq_num, &irq);
+
+	rtlx = rtlxi;
+	return (0);
+}
+
+/* only allow one open process at a time to open each channel */
+static int rtlx_open(struct inode *inode, struct file *filp)
+{
+	int minor, ret;
+	struct rtlx_channel *chan;
+
+	/* assume only 1 device at the mo. */
+	minor = MINOR(inode->i_rdev);
+
+	if (rtlx == NULL) {
+		struct rtlx_info **p;
+		if( (p = vpe_get_shared(RTLX_TARG_VPE)) == NULL) {
+			printk(" vpe_get_shared is NULL. Has an SP program been loaded?\n");
+			return (-EFAULT);
+		}
+
+		if (*p == NULL) {
+			printk(" vpe_shared %p %p\n", p, *p);
+			return (-EFAULT);
+		}
+
+		if ((ret = rtlx_init(*p)) < 0)
+			return (ret);
+	}
+
+	chan = &rtlx->channel[minor];
+
+	/* already open? */
+	if (chan->lx_state == RTLX_STATE_OPENED)
+		return (-EBUSY);
+
+	chan->lx_state = RTLX_STATE_OPENED;
+	return (0);
+}
+
+static int rtlx_release(struct inode *inode, struct file *filp)
+{
+	int minor;
+
+	minor = MINOR(inode->i_rdev);
+	rtlx->channel[minor].lx_state = RTLX_STATE_UNUSED;
+	return (0);
+}
+
+static unsigned int rtlx_poll(struct file *file, poll_table * wait)
+{
+	int minor;
+	unsigned int mask = 0;
+	struct rtlx_channel *chan;
+
+	minor = MINOR(file->f_dentry->d_inode->i_rdev);
+	chan = &rtlx->channel[minor];
+
+	poll_wait(file, &channel_wqs[minor].rt_queue, wait);
+	poll_wait(file, &channel_wqs[minor].lx_queue, wait);
+
+	/* data available to read? */
+	if (chan->lx_read != chan->lx_write)
+		mask |= POLLIN | POLLRDNORM;
+
+	/* space to write */
+	if (spacefree(chan->rt_read, chan->rt_write, chan->buffer_size))
+		mask |= POLLOUT | POLLWRNORM;
+
+	return (mask);
+}
+
+static ssize_t rtlx_read(struct file *file, char __user * buffer, size_t count,
+			 loff_t * ppos)
+{
+	size_t fl = 0L;
+	int minor;
+	struct rtlx_channel *lx;
+	DECLARE_WAITQUEUE(wait, current);
+
+	minor = MINOR(file->f_dentry->d_inode->i_rdev);
+	lx = &rtlx->channel[minor];
+
+	/* data available? */
+	if (lx->lx_write == lx->lx_read) {
+		if (file->f_flags & O_NONBLOCK)
+			return (0);	// -EAGAIN makes cat whinge
+
+		/* go to sleep */
+		add_wait_queue(&channel_wqs[minor].lx_queue, &wait);
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		while (lx->lx_write == lx->lx_read)
+			schedule();
+
+		set_current_state(TASK_RUNNING);
+		remove_wait_queue(&channel_wqs[minor].lx_queue, &wait);
+
+		/* back running */
+	}
+
+	/* find out how much in total */
+	count = min( count,
+		     (size_t)(lx->lx_write + lx->buffer_size - lx->lx_read) % lx->buffer_size);
+
+	/* then how much from the read pointer onwards */
+	fl = min( count, (size_t)lx->buffer_size - lx->lx_read);
+
+	copy_to_user (buffer, &lx->lx_buffer[lx->lx_read], fl);
+
+	/* and if there is anything left at the beginning of the buffer */
+	if ( count - fl )
+		copy_to_user (buffer + fl, lx->lx_buffer, count - fl);
+
+	/* update the index */
+	lx->lx_read += count;
+	lx->lx_read %= lx->buffer_size;
+
+	return (count);
+}
+
+static inline int spacefree(int read, int write, int size)
+{
+	if (read == write) {
+		/* never fill the buffer completely, so indexes are always equal if empty
+		   and only empty, or !equal if data available */
+		return (size - 1);
+	}
+
+	return ((read + size - write) % size) - 1;
+}
+
+static ssize_t rtlx_write(struct file *file, const char __user * buffer,
+			  size_t count, loff_t * ppos)
+{
+	int minor;
+	struct rtlx_channel *rt;
+	size_t fl;
+	DECLARE_WAITQUEUE(wait, current);
+
+	minor = MINOR(file->f_dentry->d_inode->i_rdev);
+	rt = &rtlx->channel[minor];
+
+	/* any space left... */
+	if (!spacefree(rt->rt_read, rt->rt_write, rt->buffer_size)) {
+
+		if (file->f_flags & O_NONBLOCK)
+			return (-EAGAIN);
+
+		add_wait_queue(&channel_wqs[minor].rt_queue, &wait);
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		while (!spacefree(rt->rt_read, rt->rt_write, rt->buffer_size))
+			schedule();
+
+		set_current_state(TASK_RUNNING);
+		remove_wait_queue(&channel_wqs[minor].rt_queue, &wait);
+	}
+
+	/* total number of bytes to copy */
+	count = min( count, (size_t)spacefree(rt->rt_read, rt->rt_write, rt->buffer_size) );
+
+	/* first bit from write pointer to the end of the buffer, or count */
+	fl = min(count, (size_t) rt->buffer_size - rt->rt_write);
+
+	copy_from_user(&rt->rt_buffer[rt->rt_write], buffer, fl);
+
+	/* if there's any left copy to the beginning of the buffer */
+	if( count - fl )
+		copy_from_user(rt->rt_buffer, buffer + fl, count - fl);
+
+	rt->rt_write += count;
+	rt->rt_write %= rt->buffer_size;
+
+	return(count);
+}
+
+static struct file_operations rtlx_fops = {
+	.owner = THIS_MODULE,
+	.open = rtlx_open,
+	.release = rtlx_release,
+	.write = rtlx_write,
+	.read = rtlx_read,
+	.poll = rtlx_poll
+};
+
+static int rtlx_module_init(void)
+{
+	if ((major = register_chrdev(RTLX_MAJOR, module_name, &rtlx_fops)) < 0) {
+		printk("rtlx_module_init: unable to register device\n");
+		return (-EBUSY);
+	}
+
+	if (major == 0)
+		major = RTLX_MAJOR;
+
+	return (0);
+}
+
+static void rtlx_module_exit(void)
+{
+	unregister_chrdev(major, module_name);
+}
+
+module_init(rtlx_module_init);
+module_exit(rtlx_module_exit);
+MODULE_DESCRIPTION("MIPS RTLX");
+MODULE_AUTHOR("Elizabeth Clarke, MIPS Technologies, Inc");
+MODULE_LICENSE("GPL");

arch/mips/kernel/traps.c

@@ -20,6 +20,7 @@
 #include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/kallsyms.h>
+#include <linux/bootmem.h>
 
 #include <asm/bootinfo.h>
 #include <asm/branch.h>
@@ -64,6 +65,9 @@ extern int fpu_emulator_cop1Handler(int xcptno, struct pt_regs *xcp,
 
 void (*board_be_init)(void);
 int (*board_be_handler)(struct pt_regs *regs, int is_fixup);
+void (*board_nmi_handler_setup)(void);
+void (*board_ejtag_handler_setup)(void);
+void (*board_bind_eic_interrupt)(int irq, int regset);
 
 /*
  * These constant is for searching for possible module text segments.
@@ -813,6 +817,12 @@ asmlinkage void do_reserved(struct pt_regs *regs)
 	      (regs->cp0_cause & 0x7f) >> 2);
 }
 
+asmlinkage void do_default_vi(struct pt_regs *regs)
+{
+	show_regs(regs);
+	panic("Caught unexpected vectored interrupt.");
+}
+
 /*
  * Some MIPS CPUs can enable/disable for cache parity detection, but do
  * it different ways.
@@ -921,7 +931,11 @@ void nmi_exception_handler(struct pt_regs *regs)
 	while(1) ;
 }
 
+#define VECTORSPACING 0x100	/* for EI/VI mode */
+
+unsigned long ebase;
 unsigned long exception_handlers[32];
+unsigned long vi_handlers[64];
 
 /*
  * As a side effect of the way this is implemented we're limited
@@ -935,13 +949,156 @@ void *set_except_vector(int n, void *addr)
 
 	exception_handlers[n] = handler;
 	if (n == 0 && cpu_has_divec) {
-		*(volatile u32 *)(CAC_BASE + 0x200) = 0x08000000 |
+		*(volatile u32 *)(ebase + 0x200) = 0x08000000 |
 		                                 (0x03ffffff & (handler >> 2));
-		flush_icache_range(CAC_BASE + 0x200, CAC_BASE + 0x204);
+		flush_icache_range(ebase + 0x200, ebase + 0x204);
+	}
+	return (void *)old_handler;
+}
+
+#ifdef CONFIG_CPU_MIPSR2
+/*
+ * Shadow register allocation
+ * FIXME: SMP...
+ */
+
+/* MIPSR2 shadow register sets */
+struct shadow_registers {
+	spinlock_t sr_lock;	/*  */
+	int sr_supported;	/* Number of shadow register sets supported */
+	int sr_allocated;	/* Bitmap of allocated shadow registers */
+} shadow_registers;
+
+void mips_srs_init(void)
+{
+#ifdef CONFIG_CPU_MIPSR2_SRS
+	shadow_registers.sr_supported = ((read_c0_srsctl() >> 26) & 0x0f) + 1;
+	printk ("%d MIPSR2 register sets available\n", shadow_registers.sr_supported);
+#else
+	shadow_registers.sr_supported = 1;
+#endif
+	shadow_registers.sr_allocated = 1;	/* Set 0 used by kernel */
+	spin_lock_init(&shadow_registers.sr_lock);
+}
+
+int mips_srs_max(void)
+{
+	return shadow_registers.sr_supported;
+}
+
+int mips_srs_alloc (void)
+{
+	struct shadow_registers *sr = &shadow_registers;
+	unsigned long flags;
+	int set;
+
+	spin_lock_irqsave(&sr->sr_lock, flags);
+
+	for (set = 0; set < sr->sr_supported; set++) {
+		if ((sr->sr_allocated & (1 << set)) == 0) {
+			sr->sr_allocated |= 1 << set;
+			spin_unlock_irqrestore(&sr->sr_lock, flags);
+			return set;
+		}
+	}
+
+	/* None available */
+	spin_unlock_irqrestore(&sr->sr_lock, flags);
+	return -1;
+}
+
+void mips_srs_free (int set)
+{
+	struct shadow_registers *sr = &shadow_registers;
+	unsigned long flags;
+
+	spin_lock_irqsave(&sr->sr_lock, flags);
+	sr->sr_allocated &= ~(1 << set);
+	spin_unlock_irqrestore(&sr->sr_lock, flags);
+}
+
+void *set_vi_srs_handler (int n, void *addr, int srs)
+{
+	unsigned long handler;
+	unsigned long old_handler = vi_handlers[n];
+	u32 *w;
+	unsigned char *b;
+
+	if (!cpu_has_veic && !cpu_has_vint)
+		BUG();
+
+	if (addr == NULL) {
+		handler = (unsigned long) do_default_vi;
+		srs = 0;
+	}
+	else
+		handler = (unsigned long) addr;
+	vi_handlers[n] = (unsigned long) addr;
+
+	b = (unsigned char *)(ebase + 0x200 + n*VECTORSPACING);
+
+	if (srs >= mips_srs_max())
+		panic("Shadow register set %d not supported", srs);
+
+	if (cpu_has_veic) {
+		if (board_bind_eic_interrupt)
+			board_bind_eic_interrupt (n, srs);
+	}
+	else if (cpu_has_vint) {
+		/* SRSMap is only defined if shadow sets are implemented */
+		if (mips_srs_max() > 1)
+			change_c0_srsmap (0xf << n*4, srs << n*4);
+	}
+
+	if (srs == 0) {
+		/*
+		 * If no shadow set is selected then use the default handler
+		 * that does normal register saving and a standard interrupt exit
+		 */
+
+		extern char except_vec_vi, except_vec_vi_lui;
+		extern char except_vec_vi_ori, except_vec_vi_end;
+		const int handler_len = &except_vec_vi_end - &except_vec_vi;
+		const int lui_offset = &except_vec_vi_lui - &except_vec_vi;
+		const int ori_offset = &except_vec_vi_ori - &except_vec_vi;
+
+		if (handler_len > VECTORSPACING) {
+			/*
+			 * Sigh... panicing won't help as the console
+			 * is probably not configured :(
+			 */
+			panic ("VECTORSPACING too small");
+		}
+
+		memcpy (b, &except_vec_vi, handler_len);
+		w = (u32 *)(b + lui_offset);
+		*w = (*w & 0xffff0000) | (((u32)handler >> 16) & 0xffff);
+		w = (u32 *)(b + ori_offset);
+		*w = (*w & 0xffff0000) | ((u32)handler & 0xffff);
+		flush_icache_range((unsigned long)b, (unsigned long)(b+handler_len));
+	}
+	else {
+		/*
+		 * In other cases jump directly to the interrupt handler
+		 *
+		 * It is the handlers responsibility to save registers if required
+		 * (eg hi/lo) and return from the exception using "eret"
+		 */
+		w = (u32 *)b;
+		*w++ = 0x08000000 | (((u32)handler >> 2) & 0x03fffff); /* j handler */
+		*w = 0;
+		flush_icache_range((unsigned long)b, (unsigned long)(b+8));
 	}
+
 	return (void *)old_handler;
 }
 
+void *set_vi_handler (int n, void *addr)
+{
+	return set_vi_srs_handler (n, addr, 0);
+}
+#endif
+
 /*
  * This is used by native signal handling
  */
@@ -1016,10 +1173,18 @@ void __init per_cpu_trap_init(void)
 	if (cpu_has_dsp)
 		set_c0_status(ST0_MX);
 
+#ifdef CONFIG_CPU_MIPSR2
+	write_c0_hwrena (0x0000000f); /* Allow rdhwr to all registers */
+#endif
+
 	/*
-	 * Some MIPS CPUs have a dedicated interrupt vector which reduces the
-	 * interrupt processing overhead.  Use it where available.
+	 * Interrupt handling.
 	 */
+	if (cpu_has_veic || cpu_has_vint) {
+		write_c0_ebase (ebase);
+		/* Setting vector spacing enables EI/VI mode  */
+		change_c0_intctl (0x3e0, VECTORSPACING);
+	}
 	if (cpu_has_divec)
 		set_c0_cause(CAUSEF_IV);
 
@@ -1035,13 +1200,41 @@ void __init per_cpu_trap_init(void)
 	tlb_init();
 }
 
+/* Install CPU exception handler */
+void __init set_handler (unsigned long offset, void *addr, unsigned long size)
+{
+	memcpy((void *)(ebase + offset), addr, size);
+	flush_icache_range(ebase + offset, ebase + offset + size);
+}
+
+/* Install uncached CPU exception handler */
+void __init set_uncached_handler (unsigned long offset, void *addr, unsigned long size)
+{
+#ifdef CONFIG_32BIT
+	unsigned long uncached_ebase = KSEG1ADDR(ebase);
+#endif
+#ifdef CONFIG_64BIT
+	unsigned long uncached_ebase = TO_UNCAC(ebase);
+#endif
+
+	memcpy((void *)(uncached_ebase + offset), addr, size);
+}
+
 void __init trap_init(void)
 {
 	extern char except_vec3_generic, except_vec3_r4000;
-	extern char except_vec_ejtag_debug;
 	extern char except_vec4;
 	unsigned long i;
 
+	if (cpu_has_veic || cpu_has_vint)
+		ebase = (unsigned long) alloc_bootmem_low_pages (0x200 + VECTORSPACING*64);
+	else
+		ebase = CAC_BASE;
+
+#ifdef CONFIG_CPU_MIPSR2
+	mips_srs_init();
+#endif
+
 	per_cpu_trap_init();
 
 	/*
@@ -1049,7 +1242,7 @@ void __init trap_init(void)
 	 * This will be overriden later as suitable for a particular
 	 * configuration.
 	 */
-	memcpy((void *)(CAC_BASE + 0x180), &except_vec3_generic, 0x80);
+	set_handler(0x180, &except_vec3_generic, 0x80);
 
 	/*
 	 * Setup default vectors
@@ -1061,8 +1254,8 @@ void __init trap_init(void)
 	 * Copy the EJTAG debug exception vector handler code to it's final
 	 * destination.
 	 */
-	if (cpu_has_ejtag)
-		memcpy((void *)(CAC_BASE + 0x300), &except_vec_ejtag_debug, 0x80);
+	if (cpu_has_ejtag && board_ejtag_handler_setup)
+		board_ejtag_handler_setup ();
 
 	/*
 	 * Only some CPUs have the watch exceptions.
@@ -1071,11 +1264,15 @@ void __init trap_init(void)
 		set_except_vector(23, handle_watch);
 
 	/*
-	 * Some MIPS CPUs have a dedicated interrupt vector which reduces the
-	 * interrupt processing overhead.  Use it where available.
+	 * Initialise interrupt handlers
 	 */
-	if (cpu_has_divec)
-		memcpy((void *)(CAC_BASE + 0x200), &except_vec4, 0x8);
+	if (cpu_has_veic || cpu_has_vint) {
+		int nvec = cpu_has_veic ? 64 : 8;
+		for (i = 0; i < nvec; i++)
+			set_vi_handler (i, NULL);
+	}
+	else if (cpu_has_divec)
+		set_handler(0x200, &except_vec4, 0x8);
 
 	/*
 	 * Some CPUs can enable/disable for cache parity detection, but does
@@ -1122,6 +1319,10 @@ void __init trap_init(void)
 		//set_except_vector(15, handle_ndc);
 	}
 
+
+	if (board_nmi_handler_setup)
+		board_nmi_handler_setup();
+
 	if (cpu_has_fpu && !cpu_has_nofpuex)
 		set_except_vector(15, handle_fpe);
 
@@ -1146,5 +1347,5 @@ void __init trap_init(void)
 	signal32_init();
 #endif
 
-	flush_icache_range(CAC_BASE, CAC_BASE + 0x400);
+	flush_icache_range(ebase, ebase + 0x400);
 }

arch/mips/mips-boards/generic/init.c

@@ -28,6 +28,8 @@
 #include <asm/gt64120.h>
 #include <asm/io.h>
 #include <asm/system.h>
+#include <asm/cacheflush.h>
+#include <asm/traps.h>
 
 #include <asm/mips-boards/prom.h>
 #include <asm/mips-boards/generic.h>
@@ -224,6 +226,30 @@ void __init kgdb_config (void)
 }
 #endif
 
+void __init mips_nmi_setup (void)
+{
+	void *base;
+	extern char except_vec_nmi;
+
+	base = cpu_has_veic ?
+		(void *)(CAC_BASE + 0xa80) :
+		(void *)(CAC_BASE + 0x380);
+	memcpy(base, &except_vec_nmi, 0x80);
+	flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
+}
+
+void __init mips_ejtag_setup (void)
+{
+	void *base;
+	extern char except_vec_ejtag_debug;
+
+	base = cpu_has_veic ?
+		(void *)(CAC_BASE + 0xa00) :
+		(void *)(CAC_BASE + 0x300);
+	memcpy(base, &except_vec_ejtag_debug, 0x80);
+	flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
+}
+
 void __init prom_init(void)
 {
 	u32 start, map, mask, data;
@@ -353,6 +379,9 @@ void __init prom_init(void)
 		while(1);   /* We die here... */
 	}
 #endif
+	board_nmi_handler_setup = mips_nmi_setup;
+	board_ejtag_handler_setup = mips_ejtag_setup;
+
 	prom_printf("\nLINUX started...\n");
 	prom_init_cmdline();
 	prom_meminit();

arch/mips/mips-boards/generic/memory.c

@@ -22,6 +22,7 @@
 #include <linux/init.h>
 #include <linux/mm.h>
 #include <linux/bootmem.h>
+#include <linux/string.h>
 
 #include <asm/bootinfo.h>
 #include <asm/page.h>
@@ -55,18 +56,30 @@ struct prom_pmemblock * __init prom_getmdesc(void)
 {
 	char *memsize_str;
 	unsigned int memsize;
+	char cmdline[CL_SIZE], *ptr;
 
-	memsize_str = prom_getenv("memsize");
-	if (!memsize_str) {
-		prom_printf("memsize not set in boot prom, set to default (32Mb)\n");
-		memsize = 0x02000000;
-	} else {
+	/* Check the command line first for a memsize directive */
+	strcpy(cmdline, arcs_cmdline);
+	ptr = strstr(cmdline, "memsize=");
+	if (ptr && (ptr != cmdline) && (*(ptr - 1) != ' '))
+		ptr = strstr(ptr, " memsize=");
+
+	if (ptr) {
+		memsize = memparse(ptr + 8, &ptr);
+	}
+	else {
+		/* otherwise look in the environment */
+		memsize_str = prom_getenv("memsize");
+		if (!memsize_str) {
+			prom_printf("memsize not set in boot prom, set to default (32Mb)\n");
+			memsize = 0x02000000;
+		} else {
 #ifdef DEBUG
-		prom_printf("prom_memsize = %s\n", memsize_str);
+			prom_printf("prom_memsize = %s\n", memsize_str);
 #endif
-		memsize = simple_strtol(memsize_str, NULL, 0);
+			memsize = simple_strtol(memsize_str, NULL, 0);
+		}
 	}
-
 	memset(mdesc, 0, sizeof(mdesc));
 
 	mdesc[0].type = yamon_dontuse;

arch/mips/mips-boards/generic/mipsIRQ.S

@@ -29,6 +29,20 @@
 #include <asm/regdef.h>
 #include <asm/stackframe.h>
 
+#ifdef CONFIG_MIPS_ATLAS
+#include <asm/mips-boards/atlasint.h>
+#define CASCADE_IRQ		MIPSCPU_INT_ATLAS
+#define CASCADE_DISPATCH	atlas_hw0_irqdispatch
+#endif
+#ifdef CONFIG_MIPS_MALTA
+#include <asm/mips-boards/maltaint.h>
+#define CASCADE_IRQ		MIPSCPU_INT_I8259A
+#define CASCADE_DISPATCH	malta_hw0_irqdispatch
+#endif
+#ifdef CONFIG_MIPS_SEAD
+#include <asm/mips-boards/seadint.h>
+#endif
+
 /* A lot of complication here is taken away because:
  *
  * 1) We handle one interrupt and return, sitting in a loop and moving across
@@ -80,74 +94,62 @@
 
 	mfc0	s0, CP0_CAUSE		# get irq bits
 	mfc0	s1, CP0_STATUS		# get irq mask
+	andi	s0, ST0_IM		# CAUSE.CE may be non-zero!
 	and	s0, s1
 
-	/* First we check for r4k counter/timer IRQ. */
-	andi	a0, s0, CAUSEF_IP7
-	beq	a0, zero, 1f
-	 andi	a0, s0, CAUSEF_IP2	# delay slot, check hw0 interrupt
+#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
+ 	.set	mips32
+	clz	a0, s0
+	.set	mips0
+	negu	a0
+	addu	a0, 31-CAUSEB_IP
+	bltz	a0, spurious
+#else
+	beqz	s0, spurious
+	 li	a0, 7
 
-	/* Wheee, a timer interrupt. */
-	move	a0, sp
-	jal	mips_timer_interrupt
-	 nop
+	and	t0, s0, 0xf000
+	sltiu	t0, t0, 1
+	sll	t0, 2
+	subu	a0, t0
+	sll	s0, t0
 
-	j	ret_from_irq
-	 nop
+	and	t0, s0, 0xc000
+	sltiu	t0, t0, 1
+	sll	t0, 1
+	subu	a0, t0
+	sll	s0, t0
 
-1:
-#if defined(CONFIG_MIPS_SEAD)
-	beq	a0, zero, 1f
-	 andi	a0, s0, CAUSEF_IP3	# delay slot, check hw1 interrupt
-#else
-	beq	a0, zero, 1f		# delay slot, check hw3 interrupt
- 	 andi	a0, s0, CAUSEF_IP5
+	and	t0, s0, 0x8000
+	sltiu	t0, t0, 1
+	# sll	t0, 0
+	subu	a0, t0
+	# sll	s0, t0
 #endif
 
-	/* Wheee, combined hardware level zero interrupt. */
-#if defined(CONFIG_MIPS_ATLAS)
-	jal	atlas_hw0_irqdispatch
-#elif defined(CONFIG_MIPS_MALTA)
-	jal	malta_hw0_irqdispatch
-#elif defined(CONFIG_MIPS_SEAD)
-	jal	sead_hw0_irqdispatch
-#else
-#error "MIPS board not supported\n"
-#endif
-	 move	a0, sp			# delay slot
+#ifdef CASCADE_IRQ
+	 li	a1, CASCADE_IRQ
+	bne	a0, a1, 1f
+	 addu	a0, MIPSCPU_INT_BASE
 
-	j	ret_from_irq
-	 nop				# delay slot
+	jal	CASCADE_DISPATCH
+	 move	 a0, sp
 
-1:
-#if defined(CONFIG_MIPS_SEAD)
-	beq	a0, zero, 1f
-	 andi	a0, s0, CAUSEF_IP5	# delay slot, check hw3 interrupt
-	jal	sead_hw1_irqdispatch
-	 move	a0, sp			# delay slot
-	j	ret_from_irq
-	 nop				# delay slot
-1:
-#endif
-#if defined(CONFIG_MIPS_MALTA)
-	beq	a0, zero, 1f            # check hw3 (coreHI) interrupt
-	 nop
-	jal	corehi_irqdispatch
-	 move	a0, sp
 	j	ret_from_irq
 	 nop
 1:
+#else
+	 addu	a0, MIPSCPU_INT_BASE
 #endif
-	/*
-	 * Here by mistake?  This is possible, what can happen is that by the
-	 * time we take the exception the IRQ pin goes low, so just leave if
-	 * this is the case.
-	 */
-	move	a1,s0
-	PRINT("Got interrupt: c0_cause = %08x\n")
-	mfc0	a1, CP0_EPC
-	PRINT("c0_epc = %08x\n")
+
+	jal	do_IRQ
+	 move	a1, sp
 
 	j	ret_from_irq
 	 nop
+
+
+spurious:
+	j	spurious_interrupt
+	 nop
 	END(mipsIRQ)

arch/mips/mips-boards/generic/time.c

@@ -31,22 +31,21 @@
 
 #include <asm/mipsregs.h>
 #include <asm/ptrace.h>
+#include <asm/hardirq.h>
+#include <asm/irq.h>
 #include <asm/div64.h>
 #include <asm/cpu.h>
 #include <asm/time.h>
 #include <asm/mc146818-time.h>
+#include <asm/msc01_ic.h>
 
 #include <asm/mips-boards/generic.h>
 #include <asm/mips-boards/prom.h>
+#include <asm/mips-boards/maltaint.h>
+#include <asm/mc146818-time.h>
 
 unsigned long cpu_khz;
 
-#if defined(CONFIG_MIPS_SEAD)
-#define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ5)
-#else
-#define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5)
-#endif
-
 #if defined(CONFIG_MIPS_ATLAS)
 static char display_string[] = "        LINUX ON ATLAS       ";
 #endif
@@ -59,20 +58,27 @@ static char display_string[] = "        LINUX ON SEAD       ";
 static unsigned int display_count = 0;
 #define MAX_DISPLAY_COUNT (sizeof(display_string) - 8)
 
-#define MIPS_CPU_TIMER_IRQ (NR_IRQS-1)
-
 static unsigned int timer_tick_count=0;
+static int mips_cpu_timer_irq;
 
-void mips_timer_interrupt(struct pt_regs *regs)
+static void mips_timer_dispatch (struct pt_regs *regs)
 {
+	do_IRQ (mips_cpu_timer_irq, regs);
+}
+
+irqreturn_t mips_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	irqreturn_t r;
+
+	r = timer_interrupt(irq, dev_id, regs);
+
 	if ((timer_tick_count++ % HZ) == 0) {
 		mips_display_message(&display_string[display_count++]);
 		if (display_count == MAX_DISPLAY_COUNT)
-		        display_count = 0;
-
+			display_count = 0;
 	}
 
-	ll_timer_interrupt(MIPS_CPU_TIMER_IRQ, regs);
+	return r;
 }
 
 /*
@@ -140,10 +146,8 @@ void __init mips_time_init(void)
 
 	local_irq_save(flags);
 
-#if defined(CONFIG_MIPS_ATLAS) || defined(CONFIG_MIPS_MALTA)
         /* Set Data mode - binary. */
         CMOS_WRITE(CMOS_READ(RTC_CONTROL) | RTC_DM_BINARY, RTC_CONTROL);
-#endif
 
 	est_freq = estimate_cpu_frequency ();
 
@@ -157,11 +161,22 @@ void __init mips_time_init(void)
 
 void __init mips_timer_setup(struct irqaction *irq)
 {
+	if (cpu_has_veic) {
+		set_vi_handler (MSC01E_INT_CPUCTR, mips_timer_dispatch);
+		mips_cpu_timer_irq = MSC01E_INT_BASE + MSC01E_INT_CPUCTR;
+	}
+	else {
+		if (cpu_has_vint)
+			set_vi_handler (MIPSCPU_INT_CPUCTR, mips_timer_dispatch);
+		mips_cpu_timer_irq = MIPSCPU_INT_BASE + MIPSCPU_INT_CPUCTR;
+	}
+
+
 	/* we are using the cpu counter for timer interrupts */
-	irq->handler = no_action;     /* we use our own handler */
-	setup_irq(MIPS_CPU_TIMER_IRQ, irq);
+	irq->handler = mips_timer_interrupt;	/* we use our own handler */
+	setup_irq(mips_cpu_timer_irq, irq);
+
 
         /* to generate the first timer interrupt */
 	write_c0_compare (read_c0_count() + mips_hpt_frequency/HZ);
-	set_c0_status(ALLINTS);
 }

arch/mips/mips-boards/malta/malta_int.c

@@ -30,6 +30,7 @@
 #include <linux/random.h>
 
 #include <asm/i8259.h>
+#include <asm/irq_cpu.h>
 #include <asm/io.h>
 #include <asm/mips-boards/malta.h>
 #include <asm/mips-boards/maltaint.h>
@@ -37,8 +38,10 @@
 #include <asm/gt64120.h>
 #include <asm/mips-boards/generic.h>
 #include <asm/mips-boards/msc01_pci.h>
+#include <asm/msc01_ic.h>
 
 extern asmlinkage void mipsIRQ(void);
+extern void mips_timer_interrupt(void);
 
 static DEFINE_SPINLOCK(mips_irq_lock);
 
@@ -91,13 +94,13 @@ static inline int mips_pcibios_iack(void)
 	return irq;
 }
 
-static inline int get_int(int *irq)
+static inline int get_int(void)
 {
 	unsigned long flags;
-
+	int irq;
 	spin_lock_irqsave(&mips_irq_lock, flags);
 
-	*irq = mips_pcibios_iack();
+	irq = mips_pcibios_iack();
 
 	/*
 	 * IRQ7 is used to detect spurious interrupts.
@@ -106,73 +109,82 @@ static inline int get_int(int *irq)
 	 * We can differentiate between this situation and a
 	 * "Normal" IRQ7 by reading the ISR.
 	 */
-	if (*irq == 7)
+	if (irq == 7)
 	{
 		outb(PIIX4_OCW3_SEL | PIIX4_OCW3_ISR,
 		     PIIX4_ICTLR1_OCW3);
 		if (!(inb(PIIX4_ICTLR1_OCW3) & (1 << 7))) {
-			spin_unlock_irqrestore(&mips_irq_lock, flags);
+			irq = -1; /* Spurious interrupt */
 			printk("We got a spurious interrupt from PIIX4.\n");
 			atomic_inc(&irq_err_count);
-			return -1;    /* Spurious interrupt. */
 		}
 	}
 
 	spin_unlock_irqrestore(&mips_irq_lock, flags);
 
-	return 0;
+	return irq;
 }
 
 void malta_hw0_irqdispatch(struct pt_regs *regs)
 {
 	int irq;
 
-	if (get_int(&irq))
-	        return;  /* interrupt has already been cleared */
+	irq = get_int();
+	if (irq < 0)
+		return;  /* interrupt has already been cleared */
 
-	do_IRQ(irq, regs);
+	do_IRQ(MALTA_INT_BASE+irq, regs);
 }
 
 void corehi_irqdispatch(struct pt_regs *regs)
 {
-        unsigned int data,datahi;
-
-	/* Mask out corehi interrupt. */
-	clear_c0_status(IE_IRQ3);
+	unsigned int intrcause,datalo,datahi;
+        unsigned int pcimstat, intisr, inten, intpol, intedge, intsteer, pcicmd, pcibadaddr;
 
         printk("CoreHI interrupt, shouldn't happen, so we die here!!!\n");
         printk("epc   : %08lx\nStatus: %08lx\nCause : %08lx\nbadVaddr : %08lx\n"
 , regs->cp0_epc, regs->cp0_status, regs->cp0_cause, regs->cp0_badvaddr);
+
+	/* Read all the registers and then print them as there is a
+	   problem with interspersed printk's upsetting the Bonito controller.
+	   Do it for the others too.
+	*/
+
         switch(mips_revision_corid) {
         case MIPS_REVISION_CORID_CORE_MSC:
         case MIPS_REVISION_CORID_CORE_FPGA2:
-	case MIPS_REVISION_CORID_CORE_EMUL_MSC:
+        case MIPS_REVISION_CORID_CORE_EMUL_MSC:
+                ll_msc_irq(regs);
                 break;
         case MIPS_REVISION_CORID_QED_RM5261:
         case MIPS_REVISION_CORID_CORE_LV:
         case MIPS_REVISION_CORID_CORE_FPGA:
         case MIPS_REVISION_CORID_CORE_FPGAR2:
-                data = GT_READ(GT_INTRCAUSE_OFS);
-                printk("GT_INTRCAUSE = %08x\n", data);
-                data = GT_READ(GT_CPUERR_ADDRLO_OFS);
+                intrcause = GT_READ(GT_INTRCAUSE_OFS);
+                datalo = GT_READ(GT_CPUERR_ADDRLO_OFS);
                 datahi = GT_READ(GT_CPUERR_ADDRHI_OFS);
-                printk("GT_CPUERR_ADDR = %02x%08x\n", datahi, data);
+                printk("GT_INTRCAUSE = %08x\n", intrcause);
+                printk("GT_CPUERR_ADDR = %02x%08x\n", datahi, datalo);
                 break;
         case MIPS_REVISION_CORID_BONITO64:
         case MIPS_REVISION_CORID_CORE_20K:
         case MIPS_REVISION_CORID_CORE_EMUL_BON:
-                data = BONITO_INTISR;
-                printk("BONITO_INTISR = %08x\n", data);
-                data = BONITO_INTEN;
-                printk("BONITO_INTEN = %08x\n", data);
-                data = BONITO_INTPOL;
-                printk("BONITO_INTPOL = %08x\n", data);
-                data = BONITO_INTEDGE;
-                printk("BONITO_INTEDGE = %08x\n", data);
-                data = BONITO_INTSTEER;
-                printk("BONITO_INTSTEER = %08x\n", data);
-                data = BONITO_PCICMD;
-                printk("BONITO_PCICMD = %08x\n", data);
+                pcibadaddr = BONITO_PCIBADADDR;
+                pcimstat = BONITO_PCIMSTAT;
+                intisr = BONITO_INTISR;
+                inten = BONITO_INTEN;
+                intpol = BONITO_INTPOL;
+                intedge = BONITO_INTEDGE;
+                intsteer = BONITO_INTSTEER;
+                pcicmd = BONITO_PCICMD;
+                printk("BONITO_INTISR = %08x\n", intisr);
+                printk("BONITO_INTEN = %08x\n", inten);
+                printk("BONITO_INTPOL = %08x\n", intpol);
+                printk("BONITO_INTEDGE = %08x\n", intedge);
+                printk("BONITO_INTSTEER = %08x\n", intsteer);
+                printk("BONITO_PCICMD = %08x\n", pcicmd);
+                printk("BONITO_PCIBADADDR = %08x\n", pcibadaddr);
+                printk("BONITO_PCIMSTAT = %08x\n", pcimstat);
                 break;
         }
 
@@ -180,8 +192,70 @@ void corehi_irqdispatch(struct pt_regs *regs)
         die("CoreHi interrupt", regs);
 }
 
+static struct irqaction i8259irq = {
+	.handler = no_action,
+	.name = "XT-PIC cascade"
+};
+
+static struct irqaction corehi_irqaction = {
+	.handler = no_action,
+	.name = "CoreHi"
+};
+
+msc_irqmap_t __initdata msc_irqmap[] = {
+	{MSC01C_INT_TMR,		MSC01_IRQ_EDGE, 0},
+	{MSC01C_INT_PCI,		MSC01_IRQ_LEVEL, 0},
+};
+int __initdata msc_nr_irqs = sizeof(msc_irqmap)/sizeof(msc_irqmap_t);
+
+msc_irqmap_t __initdata msc_eicirqmap[] = {
+	{MSC01E_INT_SW0,		MSC01_IRQ_LEVEL, 0},
+	{MSC01E_INT_SW1,		MSC01_IRQ_LEVEL, 0},
+	{MSC01E_INT_I8259A,		MSC01_IRQ_LEVEL, 0},
+	{MSC01E_INT_SMI,		MSC01_IRQ_LEVEL, 0},
+	{MSC01E_INT_COREHI,		MSC01_IRQ_LEVEL, 0},
+	{MSC01E_INT_CORELO,		MSC01_IRQ_LEVEL, 0},
+	{MSC01E_INT_TMR,		MSC01_IRQ_EDGE, 0},
+	{MSC01E_INT_PCI,		MSC01_IRQ_LEVEL, 0},
+	{MSC01E_INT_PERFCTR,		MSC01_IRQ_LEVEL, 0},
+	{MSC01E_INT_CPUCTR,		MSC01_IRQ_LEVEL, 0}
+};
+int __initdata msc_nr_eicirqs = sizeof(msc_eicirqmap)/sizeof(msc_irqmap_t);
+
 void __init arch_init_irq(void)
 {
 	set_except_vector(0, mipsIRQ);
 	init_i8259_irqs();
+
+	if (!cpu_has_veic)
+		mips_cpu_irq_init (MIPSCPU_INT_BASE);
+
+        switch(mips_revision_corid) {
+        case MIPS_REVISION_CORID_CORE_MSC:
+        case MIPS_REVISION_CORID_CORE_FPGA2:
+        case MIPS_REVISION_CORID_CORE_EMUL_MSC:
+		if (cpu_has_veic)
+			init_msc_irqs (MSC01E_INT_BASE, msc_eicirqmap, msc_nr_eicirqs);
+		else
+			init_msc_irqs (MSC01C_INT_BASE, msc_irqmap, msc_nr_irqs);
+	}
+
+	if (cpu_has_veic) {
+		set_vi_handler (MSC01E_INT_I8259A, malta_hw0_irqdispatch);
+		set_vi_handler (MSC01E_INT_COREHI, corehi_irqdispatch);
+		setup_irq (MSC01E_INT_BASE+MSC01E_INT_I8259A, &i8259irq);
+		setup_irq (MSC01E_INT_BASE+MSC01E_INT_COREHI, &corehi_irqaction);
+	}
+	else if (cpu_has_vint) {
+		set_vi_handler (MIPSCPU_INT_I8259A, malta_hw0_irqdispatch);
+		set_vi_handler (MIPSCPU_INT_COREHI, corehi_irqdispatch);
+
+		setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq);
+		setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
+	}
+	else {
+		set_except_vector(0, mipsIRQ);
+		setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq);
+		setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
+	}
 }

arch/mips/mm/c-r4k.c

@@ -1228,8 +1228,7 @@ void __init ld_mmu_r4xx0(void)
 	struct cpuinfo_mips *c = &current_cpu_data;
 
 	/* Default cache error handler for R4000 and R5000 family */
-	memcpy((void *)(CAC_BASE   + 0x100), &except_vec2_generic, 0x80);
-	memcpy((void *)(UNCAC_BASE + 0x100), &except_vec2_generic, 0x80);
+	set_uncached_handler (0x100, &except_vec2_generic, 0x80);
 
 	probe_pcache();
 	setup_scache();

arch/mips/mm/c-sb1.c

@@ -502,9 +502,8 @@ void ld_mmu_sb1(void)
 	extern char handle_vec2_sb1;
 
 	/* Special cache error handler for SB1 */
-	memcpy((void *)(CAC_BASE   + 0x100), &except_vec2_sb1, 0x80);
-	memcpy((void *)(UNCAC_BASE + 0x100), &except_vec2_sb1, 0x80);
-	memcpy((void *)CKSEG1ADDR(&handle_vec2_sb1), &handle_vec2_sb1, 0x80);
+	set_uncached_handler (0x100, &except_vec2_sb1, 0x80);
+	memcpy((void *)KSEG1ADDR(&handle_vec2_sb1), &handle_vec2_sb1, 0x80);
 
 	probe_cache_sizes();
 

include/asm-mips/mips-boards/maltaint.h

@@ -25,9 +25,63 @@
 #ifndef _MIPS_MALTAINT_H
 #define _MIPS_MALTAINT_H
 
-/* Number of IRQ supported on hw interrupt 0. */
-#define MALTAINT_END      16
+/*
+ * Interrupts 0..15 are used for Malta ISA compatible interrupts
+ */
+#define MALTA_INT_BASE		0
+
+/*
+ * Interrupts 16..23 are used for Malta CPU interrupts (nonEIC mode)
+ */
+#define MIPSCPU_INT_BASE	16
+
+/* CPU interrupt offsets */
+#define MIPSCPU_INT_SW0		0
+#define MIPSCPU_INT_SW1		1
+#define MIPSCPU_INT_MB0		2
+#define MIPSCPU_INT_I8259A	MIPSCPU_INT_MB0
+#define MIPSCPU_INT_MB1		3
+#define MIPSCPU_INT_SMI		MIPSCPU_INT_MB1
+#define MIPSCPU_INT_MB2		4
+#define MIPSCPU_INT_MB3		5
+#define MIPSCPU_INT_COREHI	MIPSCPU_INT_MB3
+#define MIPSCPU_INT_MB4		6
+#define MIPSCPU_INT_CORELO	MIPSCPU_INT_MB4
+#define MIPSCPU_INT_CPUCTR	7
+
+/*
+ * Interrupts 64..127 are used for Soc-it Classic interrupts
+ */
+#define MSC01C_INT_BASE		64
+
+/* SOC-it Classic interrupt offsets */
+#define MSC01C_INT_TMR		0
+#define MSC01C_INT_PCI		1
+
+/*
+ * Interrupts 64..127 are used for Soc-it EIC interrupts
+ */
+#define MSC01E_INT_BASE		64
+
+/* SOC-it EIC interrupt offsets */
+#define MSC01E_INT_SW0		1
+#define MSC01E_INT_SW1		2
+#define MSC01E_INT_MB0		3
+#define MSC01E_INT_I8259A	MSC01E_INT_MB0
+#define MSC01E_INT_MB1		4
+#define MSC01E_INT_SMI		MSC01E_INT_MB1
+#define MSC01E_INT_MB2		5
+#define MSC01E_INT_MB3		6
+#define MSC01E_INT_COREHI	MSC01E_INT_MB3
+#define MSC01E_INT_MB4		7
+#define MSC01E_INT_CORELO	MSC01E_INT_MB4
+#define MSC01E_INT_TMR		8
+#define MSC01E_INT_PCI		9
+#define MSC01E_INT_PERFCTR	10
+#define MSC01E_INT_CPUCTR	11
 
+#ifndef __ASSEMBLY__
 extern void maltaint_init(void);
+#endif
 
 #endif /* !(_MIPS_MALTAINT_H) */

include/asm-mips/rtlx.h

+/*
+ * Copyright (C) 2004, 2005 MIPS Technologies, Inc.  All rights reserved.
+ *
+ */
+
+#ifndef _RTLX_H
+#define _RTLX_H_
+
+#define LX_NODE_BASE 10
+
+#define MIPSCPU_INT_BASE       16
+#define MIPS_CPU_RTLX_IRQ 0
+
+#define RTLX_VERSION 1
+#define RTLX_xID 0x12345600
+#define RTLX_ID (RTLX_xID | RTLX_VERSION)
+#define RTLX_CHANNELS 8
+
+enum rtlx_state {
+	RTLX_STATE_UNUSED = 0,
+	RTLX_STATE_INITIALISED,
+	RTLX_STATE_REMOTE_READY,
+	RTLX_STATE_OPENED
+};
+
+#define RTLX_BUFFER_SIZE 1024
+/* each channel supports read and write.
+   linux (vpe0) reads lx_buffer  and writes rt_buffer
+   SP (vpe1) reads rt_buffer and writes lx_buffer
+*/
+typedef struct rtlx_channel {
+	enum rtlx_state rt_state;
+	enum rtlx_state lx_state;
+
+	int buffer_size;
+
+	/* read and write indexes per buffer */
+	int rt_write, rt_read;
+	char *rt_buffer;
+
+	int lx_write, lx_read;
+	char *lx_buffer;
+
+	void *queues;
+
+} rtlx_channel_t;
+
+typedef struct rtlx_info {
+	unsigned long id;
+	enum rtlx_state state;
+
+	struct rtlx_channel channel[RTLX_CHANNELS];
+
+} rtlx_info_t;
+
+#endif

include/asm-mips/system.h

@@ -431,6 +431,10 @@ static inline unsigned long __cmpxchg(volatile void * ptr, unsigned long old,
 
 #define cmpxchg(ptr,old,new) ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(old), (unsigned long)(new),sizeof(*(ptr))))
 
+extern void set_handler (unsigned long offset, void *addr, unsigned long len);
+extern void set_uncached_handler (unsigned long offset, void *addr, unsigned long len);
+extern void *set_vi_handler (int n, void *addr);
+extern void *set_vi_srs_handler (int n, void *addr, int regset);
 extern void *set_except_vector(int n, void *addr);
 extern void per_cpu_trap_init(void);
 

include/asm-mips/traps.h

@@ -21,4 +21,7 @@
 extern void (*board_be_init)(void);
 extern int (*board_be_handler)(struct pt_regs *regs, int is_fixup);
 
+extern void (*board_nmi_handler_setup)(void);
+extern void (*board_ejtag_handler_setup)(void);
+
 #endif /* _ASM_TRAPS_H */