From owner-svn-src-all@freebsd.org Sat Nov 28 12:12:30 2015 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7367BA3ACC4; Sat, 28 Nov 2015 12:12:30 +0000 (UTC) (envelope-from mmel@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 29DCA1C8E; Sat, 28 Nov 2015 12:12:30 +0000 (UTC) (envelope-from mmel@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id tASCCToU046040; Sat, 28 Nov 2015 12:12:29 GMT (envelope-from mmel@FreeBSD.org) Received: (from mmel@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id tASCCTnr046037; Sat, 28 Nov 2015 12:12:29 GMT (envelope-from mmel@FreeBSD.org) Message-Id: <201511281212.tASCCTnr046037@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mmel set sender to mmel@FreeBSD.org using -f From: Michal Meloun Date: Sat, 28 Nov 2015 12:12:29 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r291426 - head/sys/arm/include X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Nov 2015 12:12:30 -0000 Author: mmel Date: Sat Nov 28 12:12:28 2015 New Revision: 291426 URL: https://svnweb.freebsd.org/changeset/base/291426 Log: ARM: Implement atomic_swap_int(9). It's used in DRM2 code. Approved by: kib (mentor) Modified: head/sys/arm/include/atomic-v4.h head/sys/arm/include/atomic-v6.h head/sys/arm/include/atomic.h Modified: head/sys/arm/include/atomic-v4.h ============================================================================== --- head/sys/arm/include/atomic-v4.h Sat Nov 28 12:11:44 2015 (r291425) +++ head/sys/arm/include/atomic-v4.h Sat Nov 28 12:12:28 2015 (r291426) @@ -363,6 +363,13 @@ atomic_readandclear_32(volatile u_int32_ return (__swp(0, p)); } +static __inline uint32_t +atomic_swap_32(volatile u_int32_t *p, u_int32_t v) +{ + + return (__swp(v, p)); +} + #define atomic_cmpset_rel_32 atomic_cmpset_32 #define atomic_cmpset_acq_32 atomic_cmpset_32 #define atomic_set_rel_32 atomic_set_32 Modified: head/sys/arm/include/atomic-v6.h ============================================================================== --- head/sys/arm/include/atomic-v6.h Sat Nov 28 12:11:44 2015 (r291425) +++ head/sys/arm/include/atomic-v6.h Sat Nov 28 12:12:28 2015 (r291426) @@ -641,6 +641,25 @@ atomic_testandset_64(volatile uint64_t * return (atomic_testandset_32(p32, v)); } +static __inline uint32_t +atomic_swap_32(volatile uint32_t *p, uint32_t v) +{ + uint32_t ret, exflag; + + __asm __volatile( + "1: ldrex %[ret], [%[ptr]] \n" + " strex %[exf], %[val], [%[ptr]] \n" + " teq %[exf], #0 \n" + " it ne \n" + " bne 1b \n" + : [ret] "=r" (ret), + [exf] "=&r" (exflag) + : [val] "r" (v), + [ptr] "r" (p) + : "cc", "memory"); + return (ret); +} + #undef ATOMIC_ACQ_REL #undef ATOMIC_ACQ_REL_LONG Modified: head/sys/arm/include/atomic.h ============================================================================== --- head/sys/arm/include/atomic.h Sat Nov 28 12:11:44 2015 (r291425) +++ head/sys/arm/include/atomic.h Sat Nov 28 12:12:28 2015 (r291426) @@ -109,5 +109,6 @@ atomic_store_long(volatile u_long *dst, #define atomic_readandclear_int atomic_readandclear_32 #define atomic_load_acq_int atomic_load_acq_32 #define atomic_store_rel_int atomic_store_rel_32 +#define atomic_swap_int atomic_swap_32 #endif /* _MACHINE_ATOMIC_H_ */