Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753828Ab1FSLqU (ORCPT ); Sun, 19 Jun 2011 07:46:20 -0400 Received: from mail.southpole.se ([193.12.106.18]:37743 "EHLO mail.southpole.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753678Ab1FSLpc (ORCPT ); Sun, 19 Jun 2011 07:45:32 -0400 From: Jonas Bonn To: linux-kernel@vger.kernel.org Cc: Jonas Bonn Subject: [PATCH 17/19] OpenRISC: Library routines Date: Sun, 19 Jun 2011 13:43:43 +0200 Message-Id: <1308483825-6023-18-git-send-email-jonas@southpole.se> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1308483825-6023-1-git-send-email-jonas@southpole.se> References: <1308483825-6023-1-git-send-email-jonas@southpole.se> X-Assp-Client-SSL: yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6577 Lines: 305 Signed-off-by: Jonas Bonn --- arch/openrisc/lib/delay.c | 72 ++++++++++++++++ arch/openrisc/lib/string.S | 204 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 276 insertions(+), 0 deletions(-) create mode 100644 arch/openrisc/lib/delay.c create mode 100644 arch/openrisc/lib/string.S diff --git a/arch/openrisc/lib/delay.c b/arch/openrisc/lib/delay.c new file mode 100644 index 0000000..8fc07f0 --- /dev/null +++ b/arch/openrisc/lib/delay.c @@ -0,0 +1,72 @@ +/* + * OpenRISC delay.c + * + * Linux architectural port borrowing liberally from similar works of + * others. All original copyrights apply as per the original source + * declaration. + * + * Modifications for the OpenRISC architecture: + * Copyright (C) 2003 Matjaz Breskvar + * Copyright (C) 2010-2011 Jonas Bonn + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation + * + * Precise Delay Loops + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +int __devinit read_current_timer(unsigned long *timer_value) +{ + u32 v = mfspr(SPR_TTCR); +// printk("timer value = %d\n", v); + *timer_value = v; +// *timer_value = mfspr(SPR_TTCR); + return 0; +} + +/*FIXME: move things from delay.h to this file */ + +/* +void __delay(unsigned long loops) +{ + unsigned bclock, now; + + bclock = mfspr(SPR_TTCR); + do { + now = mfspr(SPR_TTCR); + } while ((now - bclock) < loops); +} +*/ +/* +inline void __const_udelay(unsigned long xloops) +{ + unsigned long long loops; + + asm("mulu.d %0, %1, %2" + : "=r"(loops) + : "r"(current_cpu_data.loops_per_jiffy * HZ), "r"(xloops)); + __delay(loops >> 32); +} +*/ + + +//void __udelay(unsigned long usecs) +//{ +// __const_udelay(usecs * 0x000010c7); /* 2**32 / 1000000 (rounded up) */ +//} + +//void __ndelay(unsigned long nsecs) +//{ +// __const_udelay(nsecs * 0x00005); /* 2**32 / 1000000000 (rounded up) */ +//} diff --git a/arch/openrisc/lib/string.S b/arch/openrisc/lib/string.S new file mode 100644 index 0000000..465f04b --- /dev/null +++ b/arch/openrisc/lib/string.S @@ -0,0 +1,204 @@ +/* + * OpenRISC string.S + * + * Linux architectural port borrowing liberally from similar works of + * others. All original copyrights apply as per the original source + * declaration. + * + * Modifications for the OpenRISC architecture: + * Copyright (C) 2003 Matjaz Breskvar + * Copyright (C) 2010-2011 Jonas Bonn + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include +#include + + /* + * this can be optimized by doing gcc inline assemlby with + * proper constraints (no need to save args registers...) + * + */ + + +/* + * + * int __copy_tofrom_user(void *to, const void *from, unsigned long size); + * + * NOTE: it returns number of bytes NOT copied !!! + * + */ + .global __copy_tofrom_user +__copy_tofrom_user: + l.addi r1,r1,-12 + l.sw 0(r1),r6 + l.sw 4(r1),r4 + l.sw 8(r1),r3 + + l.addi r11,r5,0 +2: l.sfeq r11,r0 + l.bf 1f + l.addi r11,r11,-1 +8: l.lbz r6,0(r4) +9: l.sb 0(r3),r6 + l.addi r3,r3,1 + l.j 2b + l.addi r4,r4,1 +1: + l.addi r11,r11,1 // r11 holds the return value + + l.lwz r6,0(r1) + l.lwz r4,4(r1) + l.lwz r3,8(r1) + l.jr r9 + l.addi r1,r1,12 + + .section .fixup, "ax" +99: + l.j 1b + l.nop + .previous + + .section __ex_table, "a" + .long 8b, 99b // read fault + .long 9b, 99b // write fault + .previous + +/* + * unsigned long clear_user(void *addr, unsigned long size) ; + * + * NOTE: it returns number of bytes NOT cleared !!! + */ + .global __clear_user +__clear_user: + l.addi r1,r1,-8 + l.sw 0(r1),r4 + l.sw 4(r1),r3 + +2: l.sfeq r4,r0 + l.bf 1f + l.addi r4,r4,-1 +9: l.sb 0(r3),r0 + l.j 2b + l.addi r3,r3,1 + +1: + l.addi r11,r4,1 + + l.lwz r4,0(r1) + l.lwz r3,4(r1) + l.jr r9 + l.addi r1,r1,8 + + .section .fixup, "ax" +99: + l.j 1b + l.nop + .previous + + .section __ex_table, "a" + .long 9b, 99b // write fault + .previous + +/* + * long strncpy_from_user(char *dst, const char *src, long count) + * + * + */ + .global __strncpy_from_user +__strncpy_from_user: + l.addi r1,r1,-16 + l.sw 0(r1),r6 + l.sw 4(r1),r5 + l.sw 8(r1),r4 + l.sw 12(r1),r3 + + l.addi r11,r5,0 +2: l.sfeq r5,r0 + l.bf 1f + l.addi r5,r5,-1 +8: l.lbz r6,0(r4) + l.sfeq r6,r0 + l.bf 1f +9: l.sb 0(r3),r6 + l.addi r3,r3,1 + l.j 2b + l.addi r4,r4,1 +1: + l.lwz r6,0(r1) + l.addi r5,r5,1 + l.sub r11,r11,r5 // r11 holds the return value + + l.lwz r6,0(r1) + l.lwz r5,4(r1) + l.lwz r4,8(r1) + l.lwz r3,12(r1) + l.jr r9 + l.addi r1,r1,16 + + .section .fixup, "ax" +99: + l.movhi r11,hi(-EFAULT) + l.ori r11,r11,lo(-EFAULT) + + l.lwz r6,0(r1) + l.lwz r5,4(r1) + l.lwz r4,8(r1) + l.lwz r3,12(r1) + l.jr r9 + l.addi r1,r1,16 + .previous + + .section __ex_table, "a" + .long 8b, 99b // read fault + .previous + +/* + * extern int __strnlen_user(const char *str, long len, unsigned long top); + * + * + * RTRN: - length of a string including NUL termination character + * - on page fault 0 + */ + + .global __strnlen_user +__strnlen_user: + l.addi r1,r1,-8 + l.sw 0(r1),r6 + l.sw 4(r1),r3 + + l.addi r11,r0,0 +2: l.sfeq r11,r4 + l.bf 1f + l.addi r11,r11,1 +8: l.lbz r6,0(r3) + l.sfeq r6,r0 + l.bf 1f + l.sfgeu r3,r5 // are we over the top ? + l.bf 99f + l.j 2b + l.addi r3,r3,1 + +1: + l.lwz r6,0(r1) + l.lwz r3,4(r1) + l.jr r9 + l.addi r1,r1,8 + + .section .fixup, "ax" +99: + l.addi r11,r0,0 + + l.lwz r6,0(r1) + l.lwz r3,4(r1) + l.jr r9 + l.addi r1,r1,8 + .previous + + .section __ex_table, "a" + .long 8b, 99b // read fault + .previous -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/