From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from VA3EHSOBE008.bigfish.com (va3ehsobe001.messaging.microsoft.com [216.32.180.11]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "Cybertrust SureServer Standard Validation CA" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id D04DDB71CE for ; Sat, 21 May 2011 05:00:55 +1000 (EST) Date: Fri, 20 May 2011 14:00:47 -0500 From: Scott Wood To: Subject: [PATCH 2/2] powerpc/book3e-64: reraise doorbell when masked by soft-irq-disable Message-ID: <20110520190047.GB7058@schlenkerla.am.freescale.net> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Signed-off-by: Scott Wood --- arch/powerpc/kernel/exceptions-64e.S | 22 +++++++++++++++++++++- 1 files changed, 21 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S index b60f49e..87ca569 100644 --- a/arch/powerpc/kernel/exceptions-64e.S +++ b/arch/powerpc/kernel/exceptions-64e.S @@ -123,6 +123,12 @@ std r14,PACA_EXMC+EX_R14(r13); \ std r15,PACA_EXMC+EX_R15(r13) +#define PROLOG_ADDITION_DOORBELL_GEN \ + lbz r11,PACASOFTIRQEN(r13); /* are irqs soft-disabled ? */ \ + cmpwi cr0,r11,0; /* yes -> go out of line */ \ + beq masked_doorbell_book3e; + + /* Core exception code for all exceptions except TLB misses. * XXX: Needs to make SPRN_SPRG_GEN depend on exception type */ @@ -466,7 +472,13 @@ kernel_dbg_exc: MASKABLE_EXCEPTION(0x260, perfmon, .performance_monitor_exception, ACK_NONE) /* Doorbell interrupt */ - MASKABLE_EXCEPTION(0x2070, doorbell, .doorbell_exception, ACK_NONE) + START_EXCEPTION(doorbell) + NORMAL_EXCEPTION_PROLOG(0x2070, PROLOG_ADDITION_DOORBELL) + EXCEPTION_COMMON(0x2070, PACA_EXGEN, INTS_DISABLE_ALL) + CHECK_NAPPING() + addi r3,r1,STACK_FRAME_OVERHEAD + bl .doorbell_exception + b .ret_from_except_lite; /* Doorbell critical Interrupt */ START_EXCEPTION(doorbell_crit); @@ -521,8 +533,16 @@ kernel_dbg_exc: * An interrupt came in while soft-disabled; clear EE in SRR1, * clear paca->hard_enabled and return. */ +masked_doorbell_book3e: + mtcr r10 + /* Resend the doorbell to fire again when ints enabled */ + mfspr r10,SPRN_PIR + PPC_MSGSND(r10) + b masked_interrupt_book3e_common + masked_interrupt_book3e: mtcr r10 +masked_interrupt_book3e_common: stb r11,PACAHARDIRQEN(r13) mfspr r10,SPRN_SRR1 rldicl r11,r10,48,1 /* clear MSR_EE */ -- 1.7.4.1