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/nvidia/tegra124/Kconfig | 2 ++ src/soc/nvidia/tegra124/Makefile.inc | 4 --- src/soc/nvidia/tegra124/timer.c | 53 ------------------------------------ 3 files changed, 2 insertions(+), 57 deletions(-) delete mode 100644 src/soc/nvidia/tegra124/timer.c (limited to 'src/soc/nvidia/tegra124') diff --git a/src/soc/nvidia/tegra124/Kconfig b/src/soc/nvidia/tegra124/Kconfig index 1680f4554c..3ce368b95f 100644 --- a/src/soc/nvidia/tegra124/Kconfig +++ b/src/soc/nvidia/tegra124/Kconfig @@ -7,6 +7,8 @@ config SOC_NVIDIA_TEGRA124 select ARCH_RAMSTAGE_ARMV7 select HAVE_UART_SPECIAL select HAVE_HARD_RESET + select HAVE_MONOTONIC_TIMER + select GENERIC_UDELAY select BOOTBLOCK_CONSOLE select ARM_BOOTBLOCK_CUSTOM select ARM_LPAE diff --git a/src/soc/nvidia/tegra124/Makefile.inc b/src/soc/nvidia/tegra124/Makefile.inc index 6de142d4ce..49669ebd83 100644 --- a/src/soc/nvidia/tegra124/Makefile.inc +++ b/src/soc/nvidia/tegra124/Makefile.inc @@ -15,7 +15,6 @@ bootblock-$(CONFIG_SOFTWARE_I2C) += ../tegra/software_i2c.c bootblock-y += ../tegra/pingroup.c bootblock-y += ../tegra/pinmux.c bootblock-y += ../tegra/apbmisc.c -bootblock-y += timer.c ifeq ($(CONFIG_BOOTBLOCK_CONSOLE),y) bootblock-$(CONFIG_DRIVERS_UART) += uart.c endif @@ -25,7 +24,6 @@ verstage-y += cbfs.c verstage-y += dma.c verstage-y += monotonic_timer.c verstage-y += spi.c -verstage-y += timer.c verstage-$(CONFIG_DRIVERS_UART) += uart.c verstage-y += ../tegra/gpio.c verstage-y += ../tegra/i2c.c @@ -48,7 +46,6 @@ romstage-y += ../tegra/gpio.c romstage-y += ../tegra/i2c.c romstage-$(CONFIG_SOFTWARE_I2C) += ../tegra/software_i2c.c romstage-y += ../tegra/pinmux.c -romstage-y += timer.c romstage-y += cache.c romstage-$(CONFIG_DRIVERS_UART) += uart.c @@ -70,7 +67,6 @@ ramstage-y += ../tegra/i2c.c ramstage-$(CONFIG_SOFTWARE_I2C) += ../tegra/software_i2c.c ramstage-y += ../tegra/pinmux.c ramstage-y += ../tegra/usb.c -ramstage-y += timer.c ramstage-$(CONFIG_DRIVERS_UART) += uart.c rmodules_$(ARCH-romstage-y)-y += monotonic_timer.c diff --git a/src/soc/nvidia/tegra124/timer.c b/src/soc/nvidia/tegra124/timer.c deleted file mode 100644 index 83f499cbf1..0000000000 --- a/src/soc/nvidia/tegra124/timer.c +++ /dev/null @@ -1,53 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2013 Google Inc. - * - * 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) -{ -} - -/* delay x useconds */ -void udelay(unsigned usec) -{ - struct mono_time current, end; - - if (!thread_yield_microseconds(usec)) - return; - - 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