From owner-svn-src-stable-9@FreeBSD.ORG Sun Nov 4 13:33:59 2012 Return-Path: Delivered-To: svn-src-stable-9@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 8355DA12; Sun, 4 Nov 2012 13:33:59 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 6A3938FC08; Sun, 4 Nov 2012 13:33:59 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id qA4DXxZi098350; Sun, 4 Nov 2012 13:33:59 GMT (envelope-from avg@svn.freebsd.org) Received: (from avg@localhost) by svn.freebsd.org (8.14.4/8.14.4/Submit) id qA4DXxBY098348; Sun, 4 Nov 2012 13:33:59 GMT (envelope-from avg@svn.freebsd.org) Message-Id: <201211041333.qA4DXxBY098348@svn.freebsd.org> From: Andriy Gapon Date: Sun, 4 Nov 2012 13:33:59 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r242561 - stable/9/sys/boot/i386/libi386 X-SVN-Group: stable-9 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable-9@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: SVN commit messages for only the 9-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 04 Nov 2012 13:33:59 -0000 Author: avg Date: Sun Nov 4 13:33:59 2012 New Revision: 242561 URL: http://svn.freebsd.org/changeset/base/242561 Log: MFC r241300: i386 comconsole: don't loop forever if hardware doesn't respond Modified: stable/9/sys/boot/i386/libi386/comconsole.c Directory Properties: stable/9/sys/ (props changed) stable/9/sys/boot/ (props changed) Modified: stable/9/sys/boot/i386/libi386/comconsole.c ============================================================================== --- stable/9/sys/boot/i386/libi386/comconsole.c Sun Nov 4 13:33:13 2012 (r242560) +++ stable/9/sys/boot/i386/libi386/comconsole.c Sun Nov 4 13:33:59 2012 (r242561) @@ -63,7 +63,6 @@ static void comc_setup(int speed, int po static int comc_speed_set(struct env_var *ev, int flags, const void *value); -static int comc_started; static int comc_curspeed; static int comc_port = COMPORT; static uint32_t comc_locator; @@ -87,9 +86,6 @@ comc_probe(struct console *cp) int speed, port; uint32_t locator; - /* XXX check the BIOS equipment list? */ - cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT); - if (comc_curspeed == 0) { comc_curspeed = COMSPEED; /* @@ -137,18 +133,19 @@ comc_probe(struct console *cp) env_setenv("comconsole_pcidev", EV_VOLATILE, env, comc_pcidev_set, env_nounset); } + comc_setup(comc_curspeed, comc_port); } static int comc_init(int arg) { - if (comc_started && arg == 0) - return 0; - comc_started = 1; comc_setup(comc_curspeed, comc_port); - return(0); + if ((comconsole.c_flags & (C_PRESENTIN | C_PRESENTOUT)) == + (C_PRESENTIN | C_PRESENTOUT)) + return (CMD_OK); + return (CMD_ERROR); } static void @@ -166,13 +163,13 @@ comc_putchar(int c) static int comc_getchar(void) { - return(comc_ischar() ? inb(comc_port + com_data) : -1); + return (comc_ischar() ? inb(comc_port + com_data) : -1); } static int comc_ischar(void) { - return(inb(comc_port + com_lsr) & LSR_RXRDY); + return (inb(comc_port + com_lsr) & LSR_RXRDY); } static int @@ -185,7 +182,8 @@ comc_speed_set(struct env_var *ev, int f return (CMD_ERROR); } - if (comc_started && comc_curspeed != speed) + if ((comconsole.c_flags & (C_ACTIVEIN | C_ACTIVEOUT)) != 0 && + comc_curspeed != speed) comc_setup(speed, comc_port); env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL); @@ -203,7 +201,8 @@ comc_port_set(struct env_var *ev, int fl return (CMD_ERROR); } - if (comc_started && comc_port != port) { + if ((comconsole.c_flags & (C_ACTIVEIN | C_ACTIVEOUT)) != 0 && + comc_port != port) { comc_setup(comc_curspeed, port); set_hw_console_hint(); } @@ -305,7 +304,8 @@ comc_pcidev_set(struct env_var *ev, int printf("Invalid pcidev\n"); return (CMD_ERROR); } - if (comc_started && comc_locator != locator) { + if ((comconsole.c_flags & (C_ACTIVEIN | C_ACTIVEOUT)) != 0 && + comc_locator != locator) { error = comc_pcidev_handle(locator); if (error != CMD_OK) return (error); @@ -317,6 +317,8 @@ comc_pcidev_set(struct env_var *ev, int static void comc_setup(int speed, int port) { + static int TRY_COUNT = 1000000; + int tries; comc_curspeed = speed; comc_port = port; @@ -327,9 +329,15 @@ comc_setup(int speed, int port) outb(comc_port + com_cfcr, COMC_FMT); outb(comc_port + com_mcr, MCR_RTS | MCR_DTR); + tries = 0; do inb(comc_port + com_data); - while (inb(comc_port + com_lsr) & LSR_RXRDY); + while (inb(comc_port + com_lsr) & LSR_RXRDY && ++tries < TRY_COUNT); + + if (tries < TRY_COUNT) + comconsole.c_flags |= (C_PRESENTIN | C_PRESENTOUT); + else + comconsole.c_flags &= ~(C_PRESENTIN | C_PRESENTOUT); } static int