From patchwork Fri Oct 6 16:54:49 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vijay Kumar X-Patchwork-Id: 822608 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=sparclinux-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3y7wlQ6T6Lz9t2h for ; Sat, 7 Oct 2017 03:56:34 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752153AbdJFQzO (ORCPT ); Fri, 6 Oct 2017 12:55:14 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:42231 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752095AbdJFQzL (ORCPT ); Fri, 6 Oct 2017 12:55:11 -0400 Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v96Gt3W8025521 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Oct 2017 16:55:04 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id v96Gt3fp009373 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Oct 2017 16:55:03 GMT Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id v96Gt2C6008209; Fri, 6 Oct 2017 16:55:03 GMT Received: from ca-sparc60.us.oracle.com (/10.147.24.150) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 06 Oct 2017 09:55:02 -0700 From: Vijay Kumar To: davem@davemloft.net Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, babu.moger@oracle.com, rob.gardner@oracle.com, sam@ravnborg.org Subject: [PATCH v3 1/5] sparc64: Define SPARC default fls function Date: Fri, 6 Oct 2017 10:54:49 -0600 Message-Id: <1507308893-9218-2-git-send-email-vijay.ac.kumar@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> References: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org fls will now require a boot time patching on T4 and above. Redefining it under arch/sparc/lib. Signed-off-by: Vijay Kumar --- arch/sparc/include/asm/bitops_64.h | 3 +- arch/sparc/lib/Makefile | 1 + arch/sparc/lib/fls.S | 67 ++++++++++++++++++++++++++++++++++++ 3 files changed, 70 insertions(+), 1 deletions(-) diff --git a/arch/sparc/include/asm/bitops_64.h b/arch/sparc/include/asm/bitops_64.h index 2d52240..30aea56 100644 --- a/arch/sparc/include/asm/bitops_64.h +++ b/arch/sparc/include/asm/bitops_64.h @@ -22,9 +22,10 @@ void clear_bit(unsigned long nr, volatile unsigned long *addr); void change_bit(unsigned long nr, volatile unsigned long *addr); +int fls(unsigned int word); + #include -#include #include #include diff --git a/arch/sparc/lib/Makefile b/arch/sparc/lib/Makefile index a1a2d39..3b9f5e0 100644 --- a/arch/sparc/lib/Makefile +++ b/arch/sparc/lib/Makefile @@ -16,6 +16,7 @@ lib-$(CONFIG_SPARC64) += atomic_64.o lib-$(CONFIG_SPARC32) += lshrdi3.o ashldi3.o lib-$(CONFIG_SPARC32) += muldi3.o bitext.o cmpdi2.o lib-$(CONFIG_SPARC64) += multi3.o +lib-$(CONFIG_SPARC64) += fls.o lib-$(CONFIG_SPARC64) += copy_page.o clear_page.o bzero.o lib-$(CONFIG_SPARC64) += csum_copy.o csum_copy_from_user.o csum_copy_to_user.o diff --git a/arch/sparc/lib/fls.S b/arch/sparc/lib/fls.S new file mode 100644 index 0000000..06b8d30 --- /dev/null +++ b/arch/sparc/lib/fls.S @@ -0,0 +1,67 @@ +/* fls.S: SPARC default fls definition. + * + * SPARC default fls definition, which follows the same algorithm as + * in generic fls(). This function will be boot time patched on T4 + * and onward. + */ + +#include +#include + + .text + .register %g2, #scratch + .register %g3, #scratch +ENTRY(fls) + brz,pn %o0, 6f + mov 0, %o1 + sethi %hi(0xffff0000), %g3 + mov %o0, %g2 + andcc %o0, %g3, %g0 + be,pt %icc, 8f + mov 32, %o1 + sethi %hi(0xff000000), %g3 + andcc %g2, %g3, %g0 + bne,pt %icc, 3f + sethi %hi(0xf0000000), %g3 + sll %o0, 8, %o0 +1: + add %o1, -8, %o1 + sra %o0, 0, %o0 + mov %o0, %g2 +2: + sethi %hi(0xf0000000), %g3 +3: + andcc %g2, %g3, %g0 + bne,pt %icc, 4f + sethi %hi(0xc0000000), %g3 + sll %o0, 4, %o0 + add %o1, -4, %o1 + sra %o0, 0, %o0 + mov %o0, %g2 +4: + andcc %g2, %g3, %g0 + be,a,pt %icc, 7f + sll %o0, 2, %o0 +5: + xnor %g0, %o0, %o0 + srl %o0, 31, %o0 + sub %o1, %o0, %o1 +6: + jmp %o7 + 8 + sra %o1, 0, %o0 +7: + add %o1, -2, %o1 + ba,pt %xcc, 5b + sra %o0, 0, %o0 +8: + sll %o0, 16, %o0 + sethi %hi(0xff000000), %g3 + sra %o0, 0, %o0 + mov %o0, %g2 + andcc %g2, %g3, %g0 + bne,pt %icc, 2b + mov 16, %o1 + ba,pt %xcc, 1b + sll %o0, 8, %o0 +ENDPROC(fls) +EXPORT_SYMBOL(fls) From patchwork Fri Oct 6 16:54:50 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vijay Kumar X-Patchwork-Id: 822604 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=sparclinux-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3y7wjs6XlCz9t2f for ; Sat, 7 Oct 2017 03:55:13 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752204AbdJFQzM (ORCPT ); Fri, 6 Oct 2017 12:55:12 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:42232 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751522AbdJFQzL (ORCPT ); Fri, 6 Oct 2017 12:55:11 -0400 Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v96Gt3b5025511 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Oct 2017 16:55:04 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id v96Gt3Rh009367 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Oct 2017 16:55:03 GMT Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id v96Gt3pG027493; Fri, 6 Oct 2017 16:55:03 GMT Received: from ca-sparc60.us.oracle.com (/10.147.24.150) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 06 Oct 2017 09:55:02 -0700 From: Vijay Kumar To: davem@davemloft.net Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, babu.moger@oracle.com, rob.gardner@oracle.com, sam@ravnborg.org Subject: [PATCH v3 2/5] sparc64: Define SPARC default __fls function Date: Fri, 6 Oct 2017 10:54:50 -0600 Message-Id: <1507308893-9218-3-git-send-email-vijay.ac.kumar@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> References: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org __fls will now require a boot time patching on T4 and above. Redefining it under arch/sparc/lib. Signed-off-by: Vijay Kumar --- arch/sparc/include/asm/bitops_64.h | 2 +- arch/sparc/lib/Makefile | 1 + arch/sparc/lib/fls64.S | 61 ++++++++++++++++++++++++++++++++++++ 3 files changed, 63 insertions(+), 1 deletions(-) diff --git a/arch/sparc/include/asm/bitops_64.h b/arch/sparc/include/asm/bitops_64.h index 30aea56..d7a46e2 100644 --- a/arch/sparc/include/asm/bitops_64.h +++ b/arch/sparc/include/asm/bitops_64.h @@ -23,10 +23,10 @@ void change_bit(unsigned long nr, volatile unsigned long *addr); int fls(unsigned int word); +int __fls(unsigned long word); #include -#include #include #ifdef __KERNEL__ diff --git a/arch/sparc/lib/Makefile b/arch/sparc/lib/Makefile index 3b9f5e0..5380c59 100644 --- a/arch/sparc/lib/Makefile +++ b/arch/sparc/lib/Makefile @@ -17,6 +17,7 @@ lib-$(CONFIG_SPARC32) += lshrdi3.o ashldi3.o lib-$(CONFIG_SPARC32) += muldi3.o bitext.o cmpdi2.o lib-$(CONFIG_SPARC64) += multi3.o lib-$(CONFIG_SPARC64) += fls.o +lib-$(CONFIG_SPARC64) += fls64.o lib-$(CONFIG_SPARC64) += copy_page.o clear_page.o bzero.o lib-$(CONFIG_SPARC64) += csum_copy.o csum_copy_from_user.o csum_copy_to_user.o diff --git a/arch/sparc/lib/fls64.S b/arch/sparc/lib/fls64.S new file mode 100644 index 0000000..c83e22a --- /dev/null +++ b/arch/sparc/lib/fls64.S @@ -0,0 +1,61 @@ +/* fls64.S: SPARC default __fls definition. + * + * SPARC default __fls definition, which follows the same algorithm as + * in generic __fls(). This function will be boot time patched on T4 + * and onward. + */ + +#include +#include + + .text + .register %g2, #scratch + .register %g3, #scratch +ENTRY(__fls) + mov -1, %g2 + sllx %g2, 32, %g2 + and %o0, %g2, %g2 + brnz,pt %g2, 1f + mov 63, %g1 + sllx %o0, 32, %o0 + mov 31, %g1 +1: + mov -1, %g2 + sllx %g2, 48, %g2 + and %o0, %g2, %g2 + brnz,pt %g2, 2f + mov -1, %g2 + sllx %o0, 16, %o0 + add %g1, -16, %g1 +2: + mov -1, %g2 + sllx %g2, 56, %g2 + and %o0, %g2, %g2 + brnz,pt %g2, 3f + mov -1, %g2 + sllx %o0, 8, %o0 + add %g1, -8, %g1 +3: + sllx %g2, 60, %g2 + and %o0, %g2, %g2 + brnz,pt %g2, 4f + mov -1, %g2 + sllx %o0, 4, %o0 + add %g1, -4, %g1 +4: + sllx %g2, 62, %g2 + and %o0, %g2, %g2 + brnz,pt %g2, 5f + mov -1, %g3 + sllx %o0, 2, %o0 + add %g1, -2, %g1 +5: + mov 0, %g2 + sllx %g3, 63, %g3 + and %o0, %g3, %o0 + movre %o0, 1, %g2 + sub %g1, %g2, %g1 + jmp %o7+8 + sra %g1, 0, %o0 +ENDPROC(__fls) +EXPORT_SYMBOL(__fls) From patchwork Fri Oct 6 16:54:51 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vijay Kumar X-Patchwork-Id: 822607 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=sparclinux-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3y7wlP2lGzz9t2f for ; Sat, 7 Oct 2017 03:56:33 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751522AbdJFQzO (ORCPT ); Fri, 6 Oct 2017 12:55:14 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:42230 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751987AbdJFQzL (ORCPT ); Fri, 6 Oct 2017 12:55:11 -0400 Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v96Gt4Ck025526 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Oct 2017 16:55:04 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id v96Gt3bf011619 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Oct 2017 16:55:04 GMT Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id v96Gt3xJ008213; Fri, 6 Oct 2017 16:55:03 GMT Received: from ca-sparc60.us.oracle.com (/10.147.24.150) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 06 Oct 2017 09:55:03 -0700 From: Vijay Kumar To: davem@davemloft.net Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, babu.moger@oracle.com, rob.gardner@oracle.com, sam@ravnborg.org Subject: [PATCH v3 3/5] sparc64: SPARC optimised fls function Date: Fri, 6 Oct 2017 10:54:51 -0600 Message-Id: <1507308893-9218-4-git-send-email-vijay.ac.kumar@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> References: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> X-Source-IP: userv0022.oracle.com [156.151.31.74] Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org Defined SPARC optimised fls using lzcnt opcode. Signed-off-by: Vijay Kumar --- arch/sparc/lib/Makefile | 1 + arch/sparc/lib/NG4fls.S | 20 ++++++++++++++++++++ 2 files changed, 21 insertions(+), 0 deletions(-) diff --git a/arch/sparc/lib/Makefile b/arch/sparc/lib/Makefile index 5380c59..2823b8e 100644 --- a/arch/sparc/lib/Makefile +++ b/arch/sparc/lib/Makefile @@ -18,6 +18,7 @@ lib-$(CONFIG_SPARC32) += muldi3.o bitext.o cmpdi2.o lib-$(CONFIG_SPARC64) += multi3.o lib-$(CONFIG_SPARC64) += fls.o lib-$(CONFIG_SPARC64) += fls64.o +obj-$(CONFIG_SPARC64) += NG4fls.o lib-$(CONFIG_SPARC64) += copy_page.o clear_page.o bzero.o lib-$(CONFIG_SPARC64) += csum_copy.o csum_copy_from_user.o csum_copy_to_user.o diff --git a/arch/sparc/lib/NG4fls.S b/arch/sparc/lib/NG4fls.S new file mode 100644 index 0000000..5ed7da9 --- /dev/null +++ b/arch/sparc/lib/NG4fls.S @@ -0,0 +1,20 @@ +/* NG4fls.S: SPARC optimized fls and __fls for T4 and above. + * + * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. + */ + +#include + +#define LXCNT_O0_G2 \ + .word 0x85b002e8 + + .text + .register %g2, #scratch + .register %g3, #scratch + +ENTRY(NG4fls) + LXCNT_O0_G2 !lzcnt %o0, %g2 + mov 64, %g3 + retl + sub %g3, %g2, %o0 +ENDPROC(NG4fls) From patchwork Fri Oct 6 16:54:52 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vijay Kumar X-Patchwork-Id: 822610 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=sparclinux-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3y7wlc3jHJz9t2h for ; Sat, 7 Oct 2017 03:56:44 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752286AbdJFQzM (ORCPT ); Fri, 6 Oct 2017 12:55:12 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:42228 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751491AbdJFQzL (ORCPT ); Fri, 6 Oct 2017 12:55:11 -0400 Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v96Gt4Xt025535 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Oct 2017 16:55:04 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id v96Gt4bd009457 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Oct 2017 16:55:04 GMT Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id v96Gt4ZA027517; Fri, 6 Oct 2017 16:55:04 GMT Received: from ca-sparc60.us.oracle.com (/10.147.24.150) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 06 Oct 2017 09:55:03 -0700 From: Vijay Kumar To: davem@davemloft.net Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, babu.moger@oracle.com, rob.gardner@oracle.com, sam@ravnborg.org Subject: [PATCH v3 4/5] sparc64: SPARC optimised __fls function Date: Fri, 6 Oct 2017 10:54:52 -0600 Message-Id: <1507308893-9218-5-git-send-email-vijay.ac.kumar@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> References: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org Defined SPARC optimised __fls using lzcnt opcode. Signed-off-by: Vijay Kumar --- arch/sparc/lib/NG4fls.S | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/arch/sparc/lib/NG4fls.S b/arch/sparc/lib/NG4fls.S index 5ed7da9..34ad371 100644 --- a/arch/sparc/lib/NG4fls.S +++ b/arch/sparc/lib/NG4fls.S @@ -18,3 +18,13 @@ ENTRY(NG4fls) retl sub %g3, %g2, %o0 ENDPROC(NG4fls) + +ENTRY(__NG4fls) + brz,pn %o0, 1f + LXCNT_O0_G2 !lzcnt %o0, %g2 + mov 63, %g3 + sub %g3, %g2, %o0 +1: + retl + nop +ENDPROC(__NG4fls) From patchwork Fri Oct 6 16:54:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vijay Kumar X-Patchwork-Id: 822609 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=sparclinux-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3y7wlS6xK7z9t2h for ; Sat, 7 Oct 2017 03:56:36 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752358AbdJFQzN (ORCPT ); Fri, 6 Oct 2017 12:55:13 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:42229 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751875AbdJFQzL (ORCPT ); Fri, 6 Oct 2017 12:55:11 -0400 Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v96Gt5D4025548 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Oct 2017 16:55:05 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id v96Gt4Xj002350 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Oct 2017 16:55:05 GMT Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id v96Gt40F008224; Fri, 6 Oct 2017 16:55:04 GMT Received: from ca-sparc60.us.oracle.com (/10.147.24.150) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 06 Oct 2017 09:55:04 -0700 From: Vijay Kumar To: davem@davemloft.net Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, babu.moger@oracle.com, rob.gardner@oracle.com, sam@ravnborg.org Subject: [PATCH v3 5/5] sparc64: Use sparc optimised fls and __fls for T4 and above Date: Fri, 6 Oct 2017 10:54:53 -0600 Message-Id: <1507308893-9218-6-git-send-email-vijay.ac.kumar@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> References: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org For T4 and above, patch fls and __fls functions at the boot time to use lzcnt instruction. Signed-off-by: Vijay Kumar --- arch/sparc/kernel/head_64.S | 2 ++ arch/sparc/lib/NG4patch.S | 9 +++++++++ 2 files changed, 11 insertions(+), 0 deletions(-) diff --git a/arch/sparc/kernel/head_64.S b/arch/sparc/kernel/head_64.S index 4de9fbd..f362ecb 100644 --- a/arch/sparc/kernel/head_64.S +++ b/arch/sparc/kernel/head_64.S @@ -640,6 +640,8 @@ niagara4_patch: nop call niagara4_patch_pageops nop + call niagara4_patch_fls + nop ba,a,pt %xcc, 80f nop diff --git a/arch/sparc/lib/NG4patch.S b/arch/sparc/lib/NG4patch.S index 3cc0f8c..da65a3e 100644 --- a/arch/sparc/lib/NG4patch.S +++ b/arch/sparc/lib/NG4patch.S @@ -3,6 +3,8 @@ * Copyright (C) 2012 David S. Miller */ +#include + #define BRANCH_ALWAYS 0x10680000 #define NOP 0x01000000 #define NG_DO_PATCH(OLD, NEW) \ @@ -52,3 +54,10 @@ niagara4_patch_pageops: retl nop .size niagara4_patch_pageops,.-niagara4_patch_pageops + +ENTRY(niagara4_patch_fls) + NG_DO_PATCH(fls, NG4fls) + NG_DO_PATCH(__fls, __NG4fls) + retl + nop +ENDPROC(niagara4_patch_fls)