From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 38F16DDDB6 for ; Wed, 11 Mar 2009 22:46:08 +1100 (EST) Received: from localhost (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.13.8) with ESMTP id n2BBk4UC023285 for ; Wed, 11 Mar 2009 06:46:04 -0500 From: Kumar Gala To: linuxppc-dev@ozlabs.org Subject: [PATCH] powerpc/85xx: Update smp support to handle doorbells and non-mpic init Date: Wed, 11 Mar 2009 06:46:03 -0500 Message-Id: <1236771963-28181-1-git-send-email-galak@kernel.crashing.org> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Use device tree to determine if we actually have an MPIC and use CPU feature to decide if we should use doorbells for IPIs. Signed-off-by: Kumar Gala --- arch/powerpc/platforms/85xx/smp.c | 43 ++++++++++++++++++++++++++++++------- 1 files changed, 35 insertions(+), 8 deletions(-) diff --git a/arch/powerpc/platforms/85xx/smp.c b/arch/powerpc/platforms/85xx/smp.c index 79a0df1..cc0b0db 100644 --- a/arch/powerpc/platforms/85xx/smp.c +++ b/arch/powerpc/platforms/85xx/smp.c @@ -21,6 +21,7 @@ #include #include #include +#include #include @@ -80,10 +81,8 @@ smp_85xx_kick_cpu(int nr) } static void __init -smp_85xx_setup_cpu(int cpu_nr) +smp_85xx_basic_setup(int cpu_nr) { - mpic_setup_this_cpu(); - /* Clear any pending timer interrupts */ mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS); @@ -91,15 +90,43 @@ smp_85xx_setup_cpu(int cpu_nr) mtspr(SPRN_TCR, TCR_DIE); } +static void __init +smp_85xx_setup_cpu(int cpu_nr) +{ + mpic_setup_this_cpu(); + + smp_85xx_basic_setup(cpu_nr); +} + struct smp_ops_t smp_85xx_ops = { - .message_pass = smp_mpic_message_pass, - .probe = smp_mpic_probe, .kick_cpu = smp_85xx_kick_cpu, - .setup_cpu = smp_85xx_setup_cpu, }; -void __init -mpc85xx_smp_init(void) +static int __init smp_dummy_probe(void) { + return NR_CPUS; +} + +void __init mpc85xx_smp_init(void) +{ + struct device_node *np; + + smp_85xx_ops.message_pass = NULL; + + np = of_find_node_by_type(NULL, "open-pic"); + if (np) { + smp_85xx_ops.probe = smp_mpic_probe; + smp_85xx_ops.setup_cpu = smp_85xx_setup_cpu; + smp_85xx_ops.message_pass = smp_mpic_message_pass; + } else { + smp_85xx_ops.probe = smp_dummy_probe; + smp_85xx_ops.setup_cpu = smp_85xx_basic_setup; + } + + if (cpu_has_feature(CPU_FTR_DBELL)) + smp_85xx_ops.message_pass = smp_dbell_message_pass; + + BUG_ON(!smp_85xx_ops.message_pass); + smp_ops = &smp_85xx_ops; } -- 1.5.6.6