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authorAaron Durbin <adurbin@chromium.org>2014-09-25 10:05:15 -0500
committerPatrick Georgi <pgeorgi@google.com>2015-04-08 18:35:01 +0200
commite5e36306a9a5bf96ab8cc990d93bbd62030e635f (patch)
tree9ecc2fb162f97fa1e918f0830f2a49b183340280 /src/soc/samsung/exynos5420
parent23b4e4c4e80c0acd17c088c6bdde8c3bfccce898 (diff)
downloadcoreboot-e5e36306a9a5bf96ab8cc990d93bbd62030e635f.tar.xz
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 <pgeorgi@chromium.org> Original-Commit-Id: 1a85fbcad778933d13eaef545135abe7e4de46ed Original-Change-Id: Idd26de19eefc91ee3b0ceddfb1bc2152e19fd8ab Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/219719 Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: http://review.coreboot.org/9334 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'src/soc/samsung/exynos5420')
-rw-r--r--src/soc/samsung/exynos5420/Kconfig1
-rw-r--r--src/soc/samsung/exynos5420/Makefile.inc3
-rw-r--r--src/soc/samsung/exynos5420/timer.c56
3 files changed, 1 insertions, 59 deletions
diff --git a/src/soc/samsung/exynos5420/Kconfig b/src/soc/samsung/exynos5420/Kconfig
index ed9d2f8a84..072976a2ac 100644
--- a/src/soc/samsung/exynos5420/Kconfig
+++ b/src/soc/samsung/exynos5420/Kconfig
@@ -5,6 +5,7 @@ config CPU_SAMSUNG_EXYNOS5420
select ARCH_RAMSTAGE_ARMV7
select CPU_HAS_BOOTBLOCK_INIT
select HAVE_MONOTONIC_TIMER
+ select GENERIC_UDELAY
select HAVE_UART_SPECIAL
select RELOCATABLE_MODULES
bool
diff --git a/src/soc/samsung/exynos5420/Makefile.inc b/src/soc/samsung/exynos5420/Makefile.inc
index eab4fb38c6..4e92864d5e 100644
--- a/src/soc/samsung/exynos5420/Makefile.inc
+++ b/src/soc/samsung/exynos5420/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 += smp.c
@@ -25,7 +24,6 @@ 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 += i2c.c
#romstage-y += wdt.c
romstage-y += cbmem.c
@@ -41,7 +39,6 @@ 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.c dp_lowlevel.c fimd.c
diff --git a/src/soc/samsung/exynos5420/timer.c b/src/soc/samsung/exynos5420/timer.c
deleted file mode 100644
index 7156a010af..0000000000
--- a/src/soc/samsung/exynos5420/timer.c
+++ /dev/null
@@ -1,56 +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 <console/console.h>
-#include <delay.h>
-#include <soc/clk.h>
-#include <thread.h>
-#include <timer.h>
-
-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;
-
- if (!thread_yield_microseconds(usec))
- return;
-
- timer_monotonic_get(&current);
- end = current;
- mono_time_add_usecs(&end, usec);
-
- if (mono_time_after(&current, &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(&current, &end))
- timer_monotonic_get(&current);
-}