diff options
| -rw-r--r-- | arch/powerpc/Kconfig | 7 | ||||
| -rw-r--r-- | arch/powerpc/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/smp-tbsync.c (renamed from arch/ppc64/kernel/smp-tbsync.c) | 112 | ||||
| -rw-r--r-- | arch/ppc64/Kconfig | 5 | ||||
| -rw-r--r-- | arch/ppc64/kernel/Makefile | 5 |
5 files changed, 65 insertions, 65 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 3cf03ab..f4e25c6 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -300,6 +300,7 @@ config PPC_PMAC64 bool depends on PPC_PMAC && POWER4 select U3_DART + select GENERIC_TBSYNC default y config PPC_PREP @@ -314,6 +315,7 @@ config PPC_MAPLE bool " Maple 970FX Evaluation Board" select U3_DART select MPIC_BROKEN_U3 + select GENERIC_TBSYNC default n help This option enables support for the Maple 970FX Evaluation Board. @@ -386,6 +388,11 @@ config PPC_MPC106 bool default n +config GENERIC_TBSYNC + bool + default y if CONFIG_PPC32 && CONFIG_SMP + default n + source "drivers/cpufreq/Kconfig" config CPU_FREQ_PMAC diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 7a3e115..631149ea 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_PPC_RTAS) += rtas.o obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o obj-$(CONFIG_RTAS_PROC) += rtas-proc.o obj-$(CONFIG_IBMVIO) += vio.o +obj-$(CONFIG_GENERIC_TBSYNC) += smp-tbsync.o ifeq ($(CONFIG_PPC_MERGE),y) diff --git a/arch/ppc64/kernel/smp-tbsync.c b/arch/powerpc/kernel/smp-tbsync.c index 7d8ec99..9adef3b 100644 --- a/arch/ppc64/kernel/smp-tbsync.c +++ b/arch/powerpc/kernel/smp-tbsync.c @@ -22,11 +22,11 @@ enum { }; static struct { - volatile long tb; - volatile long mark; + volatile u64 tb; + volatile u64 mark; volatile int cmd; volatile int handshake; - int filler[3]; + int filler[2]; volatile int ack; int filler2[7]; @@ -36,89 +36,80 @@ static struct { static volatile int running; -static void __devinit -enter_contest( long mark, long add ) +static void __devinit enter_contest(u64 mark, long add) { - while( (long)(mftb() - mark) < 0 ) + while (get_tb() < mark) tbsync->race_result = add; } -void __devinit -smp_generic_take_timebase( void ) +void __devinit smp_generic_take_timebase(void) { int cmd; - long tb; + u64 tb; local_irq_disable(); - while( !running ) - ; + while (!running) + barrier(); rmb(); - for( ;; ) { + for (;;) { tbsync->ack = 1; - while( !tbsync->handshake ) - ; + while (!tbsync->handshake) + barrier(); rmb(); cmd = tbsync->cmd; tb = tbsync->tb; + mb(); tbsync->ack = 0; - if( cmd == kExit ) - return; - - if( cmd == kSetAndTest ) { - while( tbsync->handshake ) - ; - asm volatile ("mttbl %0" :: "r" (tb & 0xfffffffful) ); - asm volatile ("mttbu %0" :: "r" (tb >> 32) ); - } else { - while( tbsync->handshake ) - ; - } - enter_contest( tbsync->mark, -1 ); + if (cmd == kExit) + break; + + while (tbsync->handshake) + barrier(); + if (cmd == kSetAndTest) + set_tb(tb >> 32, tb & 0xfffffffful); + enter_contest(tbsync->mark, -1); } local_irq_enable(); } -static int __devinit -start_contest( int cmd, long offset, long num ) +static int __devinit start_contest(int cmd, long offset, int num) { int i, score=0; - long tb, mark; + u64 tb; + long mark; tbsync->cmd = cmd; local_irq_disable(); - for( i=-3; i<num; ) { - tb = (long)mftb() + 400; + for (i = -3; i < num; ) { + tb = get_tb() + 400; tbsync->tb = tb + offset; tbsync->mark = mark = tb + 400; wmb(); tbsync->handshake = 1; - while( tbsync->ack ) - ; + while (tbsync->ack) + barrier(); - while( (long)(mftb() - tb) <= 0 ) - ; + while (get_tb() <= tb) + barrier(); tbsync->handshake = 0; - enter_contest( mark, 1 ); + enter_contest(mark, 1); - while( !tbsync->ack ) - ; + while (!tbsync->ack) + barrier(); - if ((tbsync->tb ^ (long)mftb()) & 0x8000000000000000ul) - continue; - if( i++ > 0 ) + if (i++ > 0) score += tbsync->race_result; } local_irq_enable(); return score; } -void __devinit -smp_generic_give_timebase( void ) +void __devinit smp_generic_give_timebase(void) { int i, score, score2, old, min=0, max=5000, offset=1000; @@ -130,14 +121,14 @@ smp_generic_give_timebase( void ) mb(); running = 1; - while( !tbsync->ack ) - ; + while (!tbsync->ack) + barrier(); printk("Got ack\n"); /* binary search */ - for( old=-1 ; old != offset ; offset=(min+max)/2 ) { - score = start_contest( kSetAndTest, offset, NUM_ITER ); + for (old = -1; old != offset ; offset = (min+max) / 2) { + score = start_contest(kSetAndTest, offset, NUM_ITER); printk("score %d, offset %d\n", score, offset ); @@ -147,21 +138,22 @@ smp_generic_give_timebase( void ) min = offset; old = offset; } - score = start_contest( kSetAndTest, min, NUM_ITER ); - score2 = start_contest( kSetAndTest, max, NUM_ITER ); + 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 ); + 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 ); + for (i = 0; i < 10; i++) { + start_contest(kSetAndTest, offset, NUM_ITER/10); - if( (score2=start_contest(kTest, offset, NUM_ITER)) < 0 ) + if ((score2 = start_contest(kTest, offset, NUM_ITER)) < 0) score2 = -score2; - if( score2 <= score || score2 < 20 ) + if (score2 <= score || score2 < 20) break; } printk("Final offset: %d (%d/%d)\n", offset, score2, NUM_ITER ); @@ -170,10 +162,10 @@ smp_generic_give_timebase( void ) tbsync->cmd = kExit; wmb(); tbsync->handshake = 1; - while( tbsync->ack ) - ; + while (tbsync->ack) + barrier(); tbsync->handshake = 0; - kfree( tbsync ); + kfree(tbsync); tbsync = NULL; running = 0; } diff --git a/arch/ppc64/Kconfig b/arch/ppc64/Kconfig index 42677cc..b987164 100644 --- a/arch/ppc64/Kconfig +++ b/arch/ppc64/Kconfig @@ -89,12 +89,14 @@ config PPC_PMAC bool " Apple G5 based machines" default y select U3_DART + select GENERIC_TBSYNC config PPC_MAPLE depends on PPC_MULTIPLATFORM bool " Maple 970FX Evaluation Board" select U3_DART select MPIC_BROKEN_U3 + select GENERIC_TBSYNC default n help This option enables support for the Maple 970FX Evaluation Board. @@ -182,6 +184,9 @@ config MPIC_BROKEN_U3 depends on PPC_MAPLE default y +config GENERIC_TBSYNC + def_bool n + config PPC_PMAC64 bool depends on PPC_PMAC diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile index 430cb39..f597c29 100644 --- a/arch/ppc64/kernel/Makefile +++ b/arch/ppc64/kernel/Makefile @@ -51,11 +51,6 @@ obj-$(CONFIG_PPC_PMAC) += udbg_scc.o obj-$(CONFIG_PPC_MAPLE) += udbg_16550.o -ifdef CONFIG_SMP -obj-$(CONFIG_PPC_PMAC) += smp-tbsync.o -obj-$(CONFIG_PPC_MAPLE) += smp-tbsync.o -endif - obj-$(CONFIG_KPROBES) += kprobes.o CFLAGS_ioctl32.o += -Ifs/ |
