From e5e36306a9a5bf96ab8cc990d93bbd62030e635f Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Thu, 25 Sep 2014 10:05:15 -0500 Subject: timer: Add generic udelay() implementation Add GENERIC_UDELAY Kconfig option so that a generic udelay() implementation is provided utilizing the monotonic timer. That way each board/chipset doesn't need to duplicate the same udelay(). Additionally, assume that GENERIC_UDELAY implies init_timer() is not required. BUG=None BRANCH=None TEST=Built nyan, ryu, and rambi. May need help testing. Change-Id: I7f511a2324b5aa5d1b2959f4519be85a6a7360e8 Signed-off-by: Patrick Georgi Original-Commit-Id: 1a85fbcad778933d13eaef545135abe7e4de46ed Original-Change-Id: Idd26de19eefc91ee3b0ceddfb1bc2152e19fd8ab Original-Signed-off-by: Aaron Durbin Original-Reviewed-on: https://chromium-review.googlesource.com/219719 Original-Reviewed-by: Julius Werner Original-Reviewed-by: Furquan Shaikh Reviewed-on: http://review.coreboot.org/9334 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi --- src/soc/samsung/exynos5250/Kconfig | 1 + src/soc/samsung/exynos5250/Makefile.inc | 3 -- src/soc/samsung/exynos5250/timer.c | 52 --------------------------------- 3 files changed, 1 insertion(+), 55 deletions(-) delete mode 100644 src/soc/samsung/exynos5250/timer.c (limited to 'src/soc/samsung/exynos5250') diff --git a/src/soc/samsung/exynos5250/Kconfig b/src/soc/samsung/exynos5250/Kconfig index 4126ec1e59..7034e96201 100644 --- a/src/soc/samsung/exynos5250/Kconfig +++ b/src/soc/samsung/exynos5250/Kconfig @@ -5,6 +5,7 @@ config CPU_SAMSUNG_EXYNOS5250 select ARCH_RAMSTAGE_ARMV7 select CPU_HAS_BOOTBLOCK_INIT select HAVE_MONOTONIC_TIMER + select GENERIC_UDELAY select HAVE_UART_SPECIAL bool default n diff --git a/src/soc/samsung/exynos5250/Makefile.inc b/src/soc/samsung/exynos5250/Makefile.inc index 4483f820d0..4cf2d9675e 100644 --- a/src/soc/samsung/exynos5250/Makefile.inc +++ b/src/soc/samsung/exynos5250/Makefile.inc @@ -10,7 +10,6 @@ bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c endif bootblock-y += wakeup.c bootblock-y += gpio.c -bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += timer.c romstage-y += spi.c alternate_cbfs.c romstage-y += clock.c @@ -24,7 +23,6 @@ romstage-y += monotonic_timer.c romstage-$(CONFIG_DRIVERS_UART) += uart.c romstage-y += wakeup.c romstage-y += gpio.c -romstage-y += timer.c romstage-y += trustzone.c romstage-y += i2c.c #romstage-y += wdt.c @@ -40,7 +38,6 @@ ramstage-y += cpu.c ramstage-y += tmu.c ramstage-y += mct.c ramstage-y += monotonic_timer.c -ramstage-y += timer.c ramstage-y += gpio.c ramstage-y += i2c.c ramstage-y += dp-reg.c diff --git a/src/soc/samsung/exynos5250/timer.c b/src/soc/samsung/exynos5250/timer.c deleted file mode 100644 index 891c3d74cd..0000000000 --- a/src/soc/samsung/exynos5250/timer.c +++ /dev/null @@ -1,52 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2009 Samsung Electronics - * - * 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; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include -#include -#include -#include - -void init_timer(void) -{ - /* Nothing to do because we manually - * call mct_start() in the bootblock - */ -} - -/* delay x useconds */ -void udelay(unsigned usec) -{ - struct mono_time current, end; - - timer_monotonic_get(¤t); - end = current; - mono_time_add_usecs(&end, usec); - - if (mono_time_after(¤t, &end)) { - printk(BIOS_EMERG, "udelay: 0x%08x is impossibly large\n", - usec); - /* There's not much we can do if usec is too big. Use a long, - * paranoid delay value and hope for the best... */ - end = current; - mono_time_add_usecs(&end, USECS_PER_SEC); - } - - while (mono_time_before(¤t, &end)) - timer_monotonic_get(¤t); -} -- cgit v1.2.3