From owner-svn-src-head@FreeBSD.ORG Sun Nov 17 02:05:21 2013 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id DC8F9A7A; Sun, 17 Nov 2013 02:05:21 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id B357B20D9; Sun, 17 Nov 2013 02:05:21 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id rAH25Lgn071300; Sun, 17 Nov 2013 02:05:21 GMT (envelope-from nwhitehorn@svn.freebsd.org) Received: (from nwhitehorn@localhost) by svn.freebsd.org (8.14.7/8.14.5/Submit) id rAH25Ljf071296; Sun, 17 Nov 2013 02:05:21 GMT (envelope-from nwhitehorn@svn.freebsd.org) Message-Id: <201311170205.rAH25Ljf071296@svn.freebsd.org> From: Nathan Whitehorn Date: Sun, 17 Nov 2013 02:05:21 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r258246 - in head/sys/powerpc: include powerpc X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 17 Nov 2013 02:05:21 -0000 Author: nwhitehorn Date: Sun Nov 17 02:05:20 2013 New Revision: 258246 URL: http://svnweb.freebsd.org/changeset/base/258246 Log: There is no reason Book-E needs to save XER and CTR on context switches. They aren't Book-E specific registers to begin with and, even if they were, are defined volatile by the ABI. Modified: head/sys/powerpc/include/pcb.h head/sys/powerpc/powerpc/genassym.c head/sys/powerpc/powerpc/swtch32.S Modified: head/sys/powerpc/include/pcb.h ============================================================================== --- head/sys/powerpc/include/pcb.h Sun Nov 17 02:03:45 2013 (r258245) +++ head/sys/powerpc/include/pcb.h Sun Nov 17 02:05:20 2013 (r258246) @@ -70,8 +70,6 @@ struct pcb { register_t usr_vsid; /* USER_SR segment */ } aim; struct { - register_t ctr; - register_t xer; register_t dbcr0; } booke; } pcb_cpu; Modified: head/sys/powerpc/powerpc/genassym.c ============================================================================== --- head/sys/powerpc/powerpc/genassym.c Sun Nov 17 02:03:45 2013 (r258245) +++ head/sys/powerpc/powerpc/genassym.c Sun Nov 17 02:05:20 2013 (r258246) @@ -192,8 +192,6 @@ ASSYM(PCB_FPU, PCB_FPU); ASSYM(PCB_VEC, PCB_VEC); ASSYM(PCB_AIM_USR_VSID, offsetof(struct pcb, pcb_cpu.aim.usr_vsid)); -ASSYM(PCB_BOOKE_CTR, offsetof(struct pcb, pcb_cpu.booke.ctr)); -ASSYM(PCB_BOOKE_XER, offsetof(struct pcb, pcb_cpu.booke.xer)); ASSYM(PCB_BOOKE_DBCR0, offsetof(struct pcb, pcb_cpu.booke.dbcr0)); ASSYM(TD_LOCK, offsetof(struct thread, td_lock)); Modified: head/sys/powerpc/powerpc/swtch32.S ============================================================================== --- head/sys/powerpc/powerpc/swtch32.S Sun Nov 17 02:03:45 2013 (r258245) +++ head/sys/powerpc/powerpc/swtch32.S Sun Nov 17 02:05:20 2013 (r258246) @@ -90,10 +90,6 @@ ENTRY(cpu_switch) mflr %r16 /* Save the link register */ stw %r16,PCB_LR(%r6) #ifdef BOOKE - mfctr %r16 - stw %r16,PCB_BOOKE_CTR(%r6) - mfxer %r16 - stw %r16,PCB_BOOKE_XER(%r6) mfspr %r16,SPR_DBCR0 stw %r16,PCB_BOOKE_DBCR0(%r6) #endif @@ -179,10 +175,6 @@ blocked_loop: isync #endif #ifdef BOOKE - lwz %r5,PCB_BOOKE_CTR(%r3) - mtctr %r5 - lwz %r5,PCB_BOOKE_XER(%r3) - mtctr %r5 lwz %r5,PCB_BOOKE_DBCR0(%r3) mtspr SPR_DBCR0,%r5 #endif