Merge branch 'master'

6 files changed, 68 insertions, 171 deletions

diff --git a/arch/mips/mips-boards/generic/Makefile b/arch/mips/mips-boards/generic/Makefile
index b21bc6887fa8..be47c1c2bc80 100644
--- a/arch/mips/mips-boards/generic/Makefile
+++ b/arch/mips/mips-boards/generic/Makefile
@@ -18,8 +18,8 @@
 # Makefile for the MIPS boards generic routines under Linux.
 #
 
-obj-y				:= mipsIRQ.o reset.o display.o init.o memory.o \
-				   printf.o cmdline.o time.o
+obj-y				:= reset.o display.o init.o memory.o printf.o \
+				   cmdline.o time.o
 obj-$(CONFIG_PCI)		+= pci.o
 obj-$(CONFIG_KGDB)		+= gdb_hook.o
 
diff --git a/arch/mips/mips-boards/generic/gdb_hook.c b/arch/mips/mips-boards/generic/gdb_hook.c
index 91a2ccbe3730..6a1854de4579 100644
--- a/arch/mips/mips-boards/generic/gdb_hook.c
+++ b/arch/mips/mips-boards/generic/gdb_hook.c
@@ -25,7 +25,7 @@
 #include <asm/serial.h>
 #include <asm/io.h>
 
-static struct serial_state rs_table[RS_TABLE_SIZE] = {
+static struct serial_state rs_table[] = {
 	SERIAL_PORT_DFNS	/* Defined in serial.h */
 };
 
diff --git a/arch/mips/mips-boards/generic/init.c b/arch/mips/mips-boards/generic/init.c
index eab5a705e989..17dfe6a8cab9 100644
--- a/arch/mips/mips-boards/generic/init.c
+++ b/arch/mips/mips-boards/generic/init.c
@@ -220,7 +220,6 @@ void __init kgdb_config (void)
 				generic_putDebugChar (*s++);
 		}
 
-		kgdb_enabled = 1;
 		/* Breakpoint is invoked after interrupts are initialised */
 	}
 }
diff --git a/arch/mips/mips-boards/generic/memory.c b/arch/mips/mips-boards/generic/memory.c
index 32c9210373ac..bc4d093685bb 100644
--- a/arch/mips/mips-boards/generic/memory.c
+++ b/arch/mips/mips-boards/generic/memory.c
@@ -22,10 +22,12 @@
 #include <linux/init.h>
 #include <linux/mm.h>
 #include <linux/bootmem.h>
+#include <linux/pfn.h>
 #include <linux/string.h>
 
 #include <asm/bootinfo.h>
 #include <asm/page.h>
+#include <asm/sections.h>
 
 #include <asm/mips-boards/prom.h>
 
@@ -46,9 +48,6 @@ static char *mtypes[3] = {
 };
 #endif
 
-/* References to section boundaries */
-extern char _end;
-
 struct prom_pmemblock * __init prom_getmdesc(void)
 {
 	char *memsize_str;
@@ -106,10 +105,10 @@ struct prom_pmemblock * __init prom_getmdesc(void)
 
 	mdesc[3].type = yamon_dontuse;
 	mdesc[3].base = 0x00100000;
-	mdesc[3].size = CPHYSADDR(PAGE_ALIGN(&_end)) - mdesc[3].base;
+	mdesc[3].size = CPHYSADDR(PFN_ALIGN((unsigned long)&_end)) - mdesc[3].base;
 
 	mdesc[4].type = yamon_free;
-	mdesc[4].base = CPHYSADDR(PAGE_ALIGN(&_end));
+	mdesc[4].base = CPHYSADDR(PFN_ALIGN(&_end));
 	mdesc[4].size = memsize - mdesc[4].base;
 
 	return &mdesc[0];
diff --git a/arch/mips/mips-boards/generic/mipsIRQ.S b/arch/mips/mips-boards/generic/mipsIRQ.S
deleted file mode 100644
index ddd5c73a2971..000000000000
--- a/arch/mips/mips-boards/generic/mipsIRQ.S
+++ /dev/null
@@ -1,155 +0,0 @@
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 1999, 2000 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.
- *
- * ########################################################################
- *
- * Interrupt exception dispatch code.
- *
- */
-#include <linux/config.h>
-
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#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
- *    all the pending IRQ bits in the cause register is _NOT_ the answer, the
- *    common case is one pending IRQ so optimize in that direction.
- *
- * 2) We need not check against bits in the status register IRQ mask, that
- *    would make this routine slow as hell.
- *
- * 3) Linux only thinks in terms of all IRQs on or all IRQs off, nothing in
- *    between like BSD spl() brain-damage.
- *
- * Furthermore, the IRQs on the MIPS board look basically (barring software
- * IRQs which we don't use at all and all external interrupt sources are
- * combined together on hardware interrupt 0 (MIPS IRQ 2)) like:
- *
- *	MIPS IRQ	Source
- *      --------        ------
- *             0	Software (ignored)
- *             1        Software (ignored)
- *             2        Combined hardware interrupt (hw0)
- *             3        Hardware (ignored)
- *             4        Hardware (ignored)
- *             5        Hardware (ignored)
- *             6        Hardware (ignored)
- *             7        R4k timer (what we use)
- *
- * Note: On the SEAD board thing are a little bit different.
- *       Here IRQ 2 (hw0) is wired to the UART0 and IRQ 3 (hw1) is wired
- *       wired to UART1.
- *
- * We handle the IRQ according to _our_ priority which is:
- *
- * Highest ----     R4k Timer
- * Lowest  ----     Combined hardware interrupt
- *
- * then we just return, if multiple IRQs are pending then we will just take
- * another exception, big deal.
- */
-
-	.text
-	.set	noreorder
-	.set	noat
-	.align	5
-	NESTED(mipsIRQ, PT_SIZE, sp)
-	SAVE_ALL
-	CLI
-	.set	at
-
-	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
-
-#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
-
-	and	t0, s0, 0xf000
-	sltiu	t0, t0, 1
-	sll	t0, 2
-	subu	a0, t0
-	sll	s0, t0
-
-	and	t0, s0, 0xc000
-	sltiu	t0, t0, 1
-	sll	t0, 1
-	subu	a0, t0
-	sll	s0, t0
-
-	and	t0, s0, 0x8000
-	sltiu	t0, t0, 1
-	# sll	t0, 0
-	subu	a0, t0
-	# sll	s0, t0
-#endif
-
-#ifdef CASCADE_IRQ
-	 li	a1, CASCADE_IRQ
-	bne	a0, a1, 1f
-	 addu	a0, MIPSCPU_INT_BASE
-
-	jal	CASCADE_DISPATCH
-	 move	 a0, sp
-
-	j	ret_from_irq
-	 nop
-1:
-#else
-	 addu	a0, MIPSCPU_INT_BASE
-#endif
-
-	jal	do_IRQ
-	 move	a1, sp
-
-	j	ret_from_irq
-	 nop
-
-
-spurious:
-	j	spurious_interrupt
-	 nop
-	END(mipsIRQ)
diff --git a/arch/mips/mips-boards/generic/time.c b/arch/mips/mips-boards/generic/time.c
index 93f3bf2c2b22..a9f6124b3a22 100644
--- a/arch/mips/mips-boards/generic/time.c
+++ b/arch/mips/mips-boards/generic/time.c
@@ -30,6 +30,7 @@
 #include <linux/mc146818rtc.h>
 
 #include <asm/mipsregs.h>
+#include <asm/mipsmtregs.h>
 #include <asm/ptrace.h>
 #include <asm/hardirq.h>
 #include <asm/irq.h>
@@ -50,16 +51,23 @@ unsigned long cpu_khz;
 static char display_string[] = "        LINUX ON ATLAS       ";
 #endif
 #if defined(CONFIG_MIPS_MALTA)
+#if defined(CONFIG_MIPS_MT_SMTC)
+static char display_string[] = "       SMTC LINUX ON MALTA       ";
+#else
 static char display_string[] = "        LINUX ON MALTA       ";
+#endif /* CONFIG_MIPS_MT_SMTC */
 #endif
 #if defined(CONFIG_MIPS_SEAD)
 static char display_string[] = "        LINUX ON SEAD       ";
 #endif
-static unsigned int display_count = 0;
+static unsigned int display_count;
 #define MAX_DISPLAY_COUNT (sizeof(display_string) - 8)
 
-static unsigned int timer_tick_count=0;
+#define CPUCTR_IMASKBIT (0x100 << MIPSCPU_INT_CPUCTR)
+
+static unsigned int timer_tick_count;
 static int mips_cpu_timer_irq;
+extern void smtc_timer_broadcast(int);
 
 static inline void scroll_display_message(void)
 {
@@ -75,15 +83,55 @@ static void mips_timer_dispatch (struct pt_regs *regs)
 	do_IRQ (mips_cpu_timer_irq, regs);
 }
 
+/*
+ * Redeclare until I get around mopping the timer code insanity on MIPS.
+ */
 extern int null_perf_irq(struct pt_regs *regs);
 
 extern int (*perf_irq)(struct pt_regs *regs);
 
 irqreturn_t mips_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
-	int r2 = cpu_has_mips_r2;
 	int cpu = smp_processor_id();
+	int r2 = cpu_has_mips_r2;
+
+#ifdef CONFIG_MIPS_MT_SMTC
+        /*
+	 *  In an SMTC system, one Count/Compare set exists per VPE.
+	 *  Which TC within a VPE gets the interrupt is essentially
+	 *  random - we only know that it shouldn't be one with
+	 *  IXMT set. Whichever TC gets the interrupt needs to
+	 *  send special interprocessor interrupts to the other
+	 *  TCs to make sure that they schedule, etc.
+	 *
+	 *  That code is specific to the SMTC kernel, not to
+	 *  the a particular platform, so it's invoked from
+	 *  the general MIPS timer_interrupt routine.
+	 */
+
+	/*
+	 * DVPE is necessary so long as cross-VPE interrupts
+	 * are done via read-modify-write of Cause register.
+	 */
+	int vpflags = dvpe();
+	write_c0_compare (read_c0_count() - 1);
+	clear_c0_cause(CPUCTR_IMASKBIT);
+	evpe(vpflags);
+
+	if (cpu_data[cpu].vpe_id == 0) {
+		timer_interrupt(irq, dev_id, regs);
+		scroll_display_message();
+	} else
+		write_c0_compare (read_c0_count() + ( mips_hpt_frequency/HZ));
+	smtc_timer_broadcast(cpu_data[cpu].vpe_id);
 
+	if (cpu != 0)
+		/*
+		 * Other CPUs should do profiling and process accounting
+		 */
+		local_timer_interrupt(irq, dev_id, regs);
+
+#else /* CONFIG_MIPS_MT_SMTC */
 	if (cpu == 0) {
 		/*
 		 * CPU 0 handles the global timer interrupt job and process
@@ -107,12 +155,14 @@ irqreturn_t mips_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 		 * More support needs to be added to kernel/time for
 		 * counter/timer interrupts on multiple CPU's
 		 */
-		write_c0_compare (read_c0_count() + (mips_hpt_frequency/HZ));
+		write_c0_compare(read_c0_count() + (mips_hpt_frequency/HZ));
+
 		/*
-		 * other CPUs should do profiling and process accounting
+		 * Other CPUs should do profiling and process accounting
 		 */
-		local_timer_interrupt (irq, dev_id, regs);
+		local_timer_interrupt(irq, dev_id, regs);
 	}
+#endif /* CONFIG_MIPS_MT_SMTC */
 
 out:
 	return IRQ_HANDLED;
@@ -126,7 +176,7 @@ static unsigned int __init estimate_cpu_frequency(void)
 	unsigned int prid = read_c0_prid() & 0xffff00;
 	unsigned int count;
 
-#ifdef CONFIG_MIPS_SEAD
+#if defined(CONFIG_MIPS_SEAD) || defined(CONFIG_MIPS_SIM)
 	/*
 	 * The SEAD board doesn't have a real time clock, so we can't
 	 * really calculate the timer frequency
@@ -211,7 +261,11 @@ void __init mips_timer_setup(struct irqaction *irq)
 
 	/* we are using the cpu counter for timer interrupts */
 	irq->handler = mips_timer_interrupt;	/* we use our own handler */
+#ifdef CONFIG_MIPS_MT_SMTC
+	setup_irq_smtc(mips_cpu_timer_irq, irq, CPUCTR_IMASKBIT);
+#else
 	setup_irq(mips_cpu_timer_irq, irq);
+#endif /* CONFIG_MIPS_MT_SMTC */
 
 #ifdef CONFIG_SMP
 	/* irq_desc(riptor) is a global resource, when the interrupt overlaps