1 files changed, 0 insertions, 180 deletions
diff --git a/arch/ppc/kernel/smp-tbsync.c b/arch/ppc/kernel/smp-tbsync.c
deleted file mode 100644
index d0cf3f86931..00000000000
--- a/arch/ppc/kernel/smp-tbsync.c
+++ /dev/null
@@ -1,180 +0,0 @@
-/*
- * Smp timebase synchronization for ppc.
- *
- * Copyright (C) 2003 Samuel Rydh (samuel@ibrium.se)
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <linux/unistd.h>
-#include <linux/init.h>
-#include <asm/atomic.h>
-#include <asm/smp.h>
-#include <asm/time.h>
-
-#define NUM_ITER		300
-
-enum {
-	kExit=0, kSetAndTest, kTest
-};
-
-static struct {
-	volatile int		tbu;
-	volatile int		tbl;
-	volatile int		mark;
-	volatile int		cmd;
-	volatile int		handshake;
-	int			filler[3];
-
-	volatile int		ack;
-	int			filler2[7];
-
-	volatile int		race_result;
-} *tbsync;
-
-static volatile int		running;
-
-static void __devinit
-enter_contest( int mark, int add )
-{
-	while( (int)(get_tbl() - mark) < 0 )
-		tbsync->race_result = add;
-}
-
-void __devinit
-smp_generic_take_timebase( void )
-{
-	int cmd, tbl, tbu;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	while( !running )
-		;
-	rmb();
-
-	for( ;; ) {
-		tbsync->ack = 1;
-		while( !tbsync->handshake )
-			;
-		rmb();
-
-		cmd = tbsync->cmd;
-		tbl = tbsync->tbl;
-		tbu = tbsync->tbu;
-		tbsync->ack = 0;
-		if( cmd == kExit )
-			break;
-
-		if( cmd == kSetAndTest ) {
-			while( tbsync->handshake )
-				;
-			asm volatile ("mttbl %0" :: "r" (tbl) );
-			asm volatile ("mttbu %0" :: "r" (tbu) );
-		} else {
-			while( tbsync->handshake )
-				;
-		}
-		enter_contest( tbsync->mark, -1 );
-	}
-	local_irq_restore(flags);
-}
-
-static int __devinit
-start_contest( int cmd, int offset, int num )
-{
-	int i, tbu, tbl, mark, score=0;
-
-	tbsync->cmd = cmd;
-
-	local_irq_disable();
-	for( i=-3; i<num; ) {
-		tbl = get_tbl() + 400;
-		tbsync->tbu = tbu = get_tbu();
-		tbsync->tbl = tbl + offset;
-		tbsync->mark = mark = tbl + 400;
-
-		wmb();
-
-		tbsync->handshake = 1;
-		while( tbsync->ack )
-			;
-
-		while( (int)(get_tbl() - tbl) <= 0 )
-			;
-		tbsync->handshake = 0;
-		enter_contest( mark, 1 );
-
-		while( !tbsync->ack )
-			;
-
-		if( tbsync->tbu != get_tbu() || ((tbsync->tbl ^ get_tbl()) & 0x80000000) )
-			continue;
-		if( i++ > 0 )
-			score += tbsync->race_result;
-	}
-	local_irq_enable();
-	return score;
-}
-
-void __devinit
-smp_generic_give_timebase( void )
-{
-	int i, score, score2, old, min=0, max=5000, offset=1000;
-
-	printk("Synchronizing timebase\n");
-
-	/* if this fails then this kernel won't work anyway... */
-	tbsync = kzalloc( sizeof(*tbsync), GFP_KERNEL );
-	mb();
-	running = 1;
-
-	while( !tbsync->ack )
-		;
-
-	/* binary search */
-	for( old=-1 ; old != offset ; offset=(min+max)/2 ) {
-		score = start_contest( kSetAndTest, offset, NUM_ITER );
-
-		printk("score %d, offset %d\n", score, offset );
-
-		if( score > 0 )
-			max = offset;
-		else
-			min = offset;
-		old = offset;
-	}
-	score = start_contest( kSetAndTest, min, NUM_ITER );
-	score2 = start_contest( kSetAndTest, max, NUM_ITER );
-
-	printk( "Min %d (score %d), Max %d (score %d)\n", min, score, max, score2 );
-	score = abs( score );
-	score2 = abs( score2 );
-	offset = (score < score2) ? min : max;
-
-	/* guard against inaccurate mttb */
-	for( i=0; i<10; i++ ) {
-		start_contest( kSetAndTest, offset, NUM_ITER/10 );
-
-		if( (score2=start_contest(kTest, offset, NUM_ITER)) < 0 )
-			score2 = -score2;
-		if( score2 <= score || score2 < 20 )
-			break;
-	}
-	printk("Final offset: %d (%d/%d)\n", offset, score2, NUM_ITER );
-
-	/* exiting */
-	tbsync->cmd = kExit;
-	wmb();
-	tbsync->handshake = 1;
-	while( tbsync->ack )
-		;
-	tbsync->handshake = 0;
-	kfree( tbsync );
-	tbsync = NULL;
-	running = 0;
-
-	/* all done */
-	smp_tb_synchronized = 1;
-}