Merge alpha Kconfig

arch/alpha/Kconfig

@@ -188,7 +188,7 @@ config ALPHA_MIATA
 	help
 	  The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
 	  or 600au).  There is an Installation HOWTO for this hardware at
-	  <http://members.brabant.chello.nl/~s.vandereijk/miata.html>.
+	  <http://eijk.homelinux.org/~stefan/miata.html>.
 
 config ALPHA_MIKASA
 	bool "Mikasa"
@@ -486,19 +486,8 @@ config SMP
 	  singleprocessor machines. On a singleprocessor machine, the kernel
 	  will run faster if you say N here.
 
-	  Note that if you say Y here and choose architecture "586" or
-	  "Pentium" under "Processor family", the kernel will not work on 486
-	  architectures. Similarly, multiprocessor kernels for the "PPro"
-	  architecture may not work on all Pentium based boards.
-
-	  People using multiprocessor machines who say Y here should also say
-	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
-	  Management" code will be disabled if you say Y here.
-
-	  See also the <file:Documentation/smp.txt>,
-	  <file:Documentation/i386/IO-APIC.txt>,
-	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
-	  <http://www.tldp.org/docs.html#howto>.
+	  See also the <file:Documentation/smp.tex>, and the SMP-HOWTO
+	  available at <http://www.tldp.org/docs.html#howto>.
 
 	  If you don't know what to do here, say N.
 

arch/alpha/kernel/alpha_ksyms.c

@@ -35,6 +35,9 @@
 #include <asm/cacheflush.h>
 #include <asm/vga.h>
 
+#define __KERNEL_SYSCALLS__
+#include <asm/unistd.h>
+
 extern struct hwrpb_struct *hwrpb;
 extern void dump_thread(struct pt_regs *, struct user *);
 extern spinlock_t rtc_lock;

arch/alpha/kernel/time.c

@@ -24,6 +24,8 @@
  * 2000-08-13	Jan-Benedict Glaw <jbglaw@lug-owl.de>
  * 	Fixed time_init to be aware of epoches != 1900. This prevents
  * 	booting up in 2048 for me;) Code is stolen from rtc.c.
+ * 2003-06-03	R. Scott Bailey <scott.bailey@eds.com>
+ *	Tighten sanity in time_init from 1% (10,000 PPM) to 250 PPM
  */
 #include <linux/config.h>
 #include <linux/errno.h>
@@ -306,7 +308,7 @@ void __init
 time_init(void)
 {
 	unsigned int year, mon, day, hour, min, sec, cc1, cc2, epoch;
-	unsigned long cycle_freq, one_percent;
+	unsigned long cycle_freq, tolerance;
 	long diff;
 
 	/* Calibrate CPU clock -- attempt #1.  */
@@ -324,13 +326,13 @@ time_init(void)
 
 	cycle_freq = hwrpb->cycle_freq;
 	if (est_cycle_freq) {
-		/* If the given value is within 1% of what we calculated, 
+		/* If the given value is within 250 PPM of what we calculated,
 		   accept it.  Otherwise, use what we found.  */
-		one_percent = cycle_freq / 100;
+		tolerance = cycle_freq / 4000;
 		diff = cycle_freq - est_cycle_freq;
 		if (diff < 0)
 			diff = -diff;
-		if ((unsigned long)diff > one_percent) {
+		if ((unsigned long)diff > tolerance) {
 			cycle_freq = est_cycle_freq;
 			printk("HWRPB cycle frequency bogus.  "
 			       "Estimated %lu Hz\n", cycle_freq);

arch/alpha/kernel/traps.c

@@ -15,6 +15,7 @@
 #include <linux/delay.h>
 #include <linux/smp_lock.h>
 #include <linux/module.h>
+#include <linux/init.h>
 
 #include <asm/gentrap.h>
 #include <asm/uaccess.h>
@@ -25,35 +26,37 @@
 
 #include "proto.h"
 
-/* data/code implementing a work-around for some SRMs which
-   mishandle opDEC faults
-*/
-static int opDEC_testing = 0;
-static int opDEC_fix = 0;
-static int opDEC_checked = 0;
-static unsigned long opDEC_test_pc = 0;
+/* Work-around for some SRMs which mishandle opDEC faults.  */
 
-static void
+static int opDEC_fix;
+
+static void __init
 opDEC_check(void)
 {
-	unsigned long test_pc;
-
-	if (opDEC_checked) return;
-
-	lock_kernel();
-	opDEC_testing = 1;
-
-	__asm__ __volatile__(
-		"       br      %0,1f\n"
-		"1:     addq    %0,8,%0\n"
-		"       stq     %0,%1\n"
+	__asm__ __volatile__ (
+	/* Load the address of... */
+	"	br	$16, 1f\n"
+	/* A stub instruction fault handler.  Just add 4 to the
+	   pc and continue.  */
+	"	ldq	$16, 8($sp)\n"
+	"	addq	$16, 4, $16\n"
+	"	stq	$16, 8($sp)\n"
+	"	call_pal %[rti]\n"
+	/* Install the instruction fault handler.  */
+	"1:	lda	$17, 3\n"
+	"	call_pal %[wrent]\n"
+	/* With that in place, the fault from the round-to-minf fp
+	   insn will arrive either at the "lda 4" insn (bad) or one
+	   past that (good).  This places the correct fixup in %0.  */
+	"	lda %[fix], 0\n"
 	"	cvttq/svm $f31,$f31\n"
-		: "=&r"(test_pc), "=m"(opDEC_test_pc)
-		: );
+	"	lda %[fix], 4"
+	: [fix] "=r" (opDEC_fix)
+	: [rti] "n" (PAL_rti), [wrent] "n" (PAL_wrent)
+	: "$0", "$1", "$16", "$17", "$22", "$23", "$24", "$25");
 
-	opDEC_testing = 0;
-	opDEC_checked = 1;
-	unlock_kernel();
+	if (opDEC_fix)
+		printk("opDEC fixup enabled.\n");
 }
 
 void
@@ -244,7 +247,7 @@ do_entIF(unsigned long type, struct pt_regs *regs)
 	siginfo_t info;
 	int signo, code;
 
-	if (!opDEC_testing || type != 4) {
+	if (regs->ps == 0) {
 		if (type == 1) {
 			const unsigned int *data
 			  = (const unsigned int *) regs->pc;
@@ -359,14 +362,6 @@ do_entIF(unsigned long type, struct pt_regs *regs)
 			   fault during the boot sequence and testing if
 			   we get the correct PC.  If not, we set a flag
 			   to correct it every time through.  */
-			if (opDEC_testing) {
-				if (regs->pc == opDEC_test_pc) {
-					opDEC_fix = 4;
-					regs->pc += 4;
-					printk("opDEC fixup enabled.\n");
-				}
-				return;
-			}
 			regs->pc += opDEC_fix; 
 			
 			/* EV4 does not implement anything except normal
@@ -1083,22 +1078,22 @@ do_entUnaUser(void * va, unsigned long opcode,
 	return;
 }
 
-void
+void __init
 trap_init(void)
 {
 	/* Tell PAL-code what global pointer we want in the kernel.  */
 	register unsigned long gptr __asm__("$29");
 	wrkgp(gptr);
 
+	/* Hack for Multia (UDB) and JENSEN: some of their SRMs have
+	   a bug in the handling of the opDEC fault.  Fix it up if so.  */
+	if (implver() == IMPLVER_EV4)
+		opDEC_check();
+
 	wrent(entArith, 1);
 	wrent(entMM, 2);
 	wrent(entIF, 3);
 	wrent(entUna, 4);
 	wrent(entSys, 5);
 	wrent(entDbg, 6);
-
-	/* Hack for Multia (UDB) and JENSEN: some of their SRMs have
-	   a bug in the handling of the opDEC fault.  Fix it up if so.  */
-	if (implver() == IMPLVER_EV4)
-		opDEC_check();
 }