From patchwork Wed Jan 7 15:20:38 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 426257 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 8755C1400B7 for ; Thu, 8 Jan 2015 02:25:45 +1100 (AEDT) Received: from localhost ([::1]:41177 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y8sUR-0006JP-FD for incoming@patchwork.ozlabs.org; Wed, 07 Jan 2015 10:25:43 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39973) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y8sPp-0005v1-0g for qemu-devel@nongnu.org; Wed, 07 Jan 2015 10:21:03 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Y8sPk-0003DL-7c for qemu-devel@nongnu.org; Wed, 07 Jan 2015 10:20:56 -0500 Received: from cantor2.suse.de ([195.135.220.15]:37837 helo=mx2.suse.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y8sPj-0003An-AE; Wed, 07 Jan 2015 10:20:51 -0500 Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 7C3B175021; Wed, 7 Jan 2015 15:20:50 +0000 (UTC) From: Alexander Graf To: qemu-ppc@nongnu.org Date: Wed, 7 Jan 2015 16:20:38 +0100 Message-Id: <1420644048-16919-28-git-send-email-agraf@suse.de> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1420644048-16919-1-git-send-email-agraf@suse.de> References: <1420644048-16919-1-git-send-email-agraf@suse.de> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x (no timestamps) [generic] X-Received-From: 195.135.220.15 Cc: peter.maydell@linaro.org, qemu-devel@nongnu.org, Tom Musta Subject: [Qemu-devel] [PULL 27/37] target-ppc: Introduce tcheck X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Tom Musta Add a degenerate implementation of the Transaction Check (tcheck) instruction. Since transaction always immediately fail, this implementation simply sets CR[BF] to 0b1000, i.e. TDOOMED = 1 and MSR[TS] == 0. Signed-off-by: Tom Musta Signed-off-by: Alexander Graf --- target-ppc/translate.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/target-ppc/translate.c b/target-ppc/translate.c index 9c820d1..95a2198 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -9707,6 +9707,21 @@ GEN_TM_NOOP(tabortdc); GEN_TM_NOOP(tabortdci); GEN_TM_NOOP(tsr); +static void gen_tcheck(DisasContext *ctx) +{ + if (unlikely(!ctx->tm_enabled)) { + gen_exception_err(ctx, POWERPC_EXCP_FU, FSCR_IC_TM); + return; + } + /* Because tbegin always fails, the tcheck implementation + * is simple: + * + * CR[CRF] = TDOOMED || MSR[TS] || 0b0 + * = 0b1 || 0b00 || 0b0 + */ + tcg_gen_movi_i32(cpu_crf[crfD(ctx->opcode)], 0x8); +} + static opcode_t opcodes[] = { GEN_HANDLER(invalid, 0x00, 0x00, 0x00, 0xFFFFFFFF, PPC_NONE), GEN_HANDLER(cmp, 0x1F, 0x00, 0x00, 0x00400000, PPC_INTEGER), @@ -11136,6 +11151,8 @@ GEN_HANDLER2_E(tabortdci, "tabortdci", 0x1F, 0x0E, 0x1B, 0x00000000, \ PPC_NONE, PPC2_TM), GEN_HANDLER2_E(tsr, "tsr", 0x1F, 0x0E, 0x17, 0x03DFF800, \ PPC_NONE, PPC2_TM), +GEN_HANDLER2_E(tcheck, "tcheck", 0x1F, 0x0E, 0x16, 0x007FF800, \ + PPC_NONE, PPC2_TM), }; #include "helper_regs.h"