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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
parent23b4e4c4e80c0acd17c088c6bdde8c3bfccce898 (diff)
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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')
-rw-r--r--src/Kconfig7
-rw-r--r--src/arch/mips/Makefile.inc3
-rw-r--r--src/arch/mips/timer.c31
-rw-r--r--src/include/delay.h4
-rw-r--r--src/lib/Makefile.inc5
-rw-r--r--src/lib/timer.c (renamed from src/soc/nvidia/tegra132/timer.c)7
-rw-r--r--src/soc/nvidia/tegra124/Kconfig2
-rw-r--r--src/soc/nvidia/tegra124/Makefile.inc4
-rw-r--r--src/soc/nvidia/tegra124/timer.c53
-rw-r--r--src/soc/nvidia/tegra132/Kconfig1
-rw-r--r--src/soc/nvidia/tegra132/Makefile.inc3
-rw-r--r--src/soc/rockchip/rk3288/Kconfig1
-rw-r--r--src/soc/rockchip/rk3288/timer.c27
-rw-r--r--src/soc/samsung/exynos5250/Kconfig1
-rw-r--r--src/soc/samsung/exynos5250/Makefile.inc3
-rw-r--r--src/soc/samsung/exynos5250/timer.c52
-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
19 files changed, 24 insertions, 240 deletions
diff --git a/src/Kconfig b/src/Kconfig
index cc87aec95..f94fad414 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -360,6 +360,13 @@ config HAVE_MONOTONIC_TIMER
help
The board/chipset provides a monotonic timer.
+config GENERIC_UDELAY
+ def_bool n
+ depends on HAVE_MONOTONIC_TIMER
+ help
+ The board/chipset uses a generic udelay function utilizing the
+ monotonic timer.
+
config TIMER_QUEUE
def_bool n
depends on HAVE_MONOTONIC_TIMER
diff --git a/src/arch/mips/Makefile.inc b/src/arch/mips/Makefile.inc
index 9e88ba8ce..192914086 100644
--- a/src/arch/mips/Makefile.inc
+++ b/src/arch/mips/Makefile.inc
@@ -38,7 +38,6 @@ bootblock-y += boot.c
bootblock-y += bootblock.S
bootblock-y += bootblock_simple.c
bootblock-y += stages.c
-bootblock-y += timer.c
bootblock-y += ../../lib/memcpy.c
bootblock-y += ../../lib/memmove.c
bootblock-y += ../../lib/memset.c
@@ -64,7 +63,6 @@ ifeq ($(CONFIG_ARCH_ROMSTAGE_MIPS),y)
romstage-y += boot.c
romstage-$(CONFIG_EARLY_CONSOLE) += early_console.c
romstage-y += stages.c
-romstage-y += timer.c
romstage-y += ../../lib/memcpy.c
romstage-y += ../../lib/memmove.c
romstage-y += ../../lib/memset.c
@@ -85,7 +83,6 @@ ramstage-y += ashldi3.c
ramstage-y += boot.c
ramstage-y += stages.c
ramstage-y += tables.c
-ramstage-y += timer.c
ramstage-y += ../../lib/memcpy.c
ramstage-y += ../../lib/memmove.c
ramstage-y += ../../lib/memset.c
diff --git a/src/arch/mips/timer.c b/src/arch/mips/timer.c
deleted file mode 100644
index c38601df8..000000000
--- a/src/arch/mips/timer.c
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2014 Imagination Technologies
- *
- * 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 <delay.h>
-#include <timer.h>
-
-void init_timer(void)
-{
- /* TODO */
-}
-
-void udelay(unsigned usec)
-{
- /* TODO */
-}
diff --git a/src/include/delay.h b/src/include/delay.h
index b3d8ed95d..ab1f4f982 100644
--- a/src/include/delay.h
+++ b/src/include/delay.h
@@ -1,7 +1,11 @@
#ifndef DELAY_H
#define DELAY_H
+#if IS_ENABLED(CONFIG_GENERIC_UDELAY)
+static inline void init_timer(void) {}
+#else
void init_timer(void);
+#endif
void udelay(unsigned usecs);
void mdelay(unsigned msecs);
diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index e01d3473f..079c855f6 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -22,6 +22,8 @@ bootblock-y += prog_ops.c
bootblock-y += cbfs.c cbfs_core.c
bootblock-$(CONFIG_COMMON_CBFS_SPI_WRAPPER) += cbfs_spi.c
+bootblock-$(CONFIG_GENERIC_UDELAY) += timer.c
+
bootblock-$(CONFIG_CONSOLE_CBMEM) += cbmem_console.c
bootblock-y += memchr.c
bootblock-y += memcmp.c
@@ -61,6 +63,8 @@ romstage-$(CONFIG_ARCH_ROMSTAGE_X86_32) += gcc.c
ramstage-$(CONFIG_ARCH_RAMSTAGE_X86_32) += gcc.c
endif
+romstage-$(CONFIG_GENERIC_UDELAY) += timer.c
+
ramstage-y += prog_ops.c
ramstage-y += hardwaremain.c
ramstage-y += selfboot.c
@@ -89,6 +93,7 @@ ramstage-y += memrange.c
ramstage-$(CONFIG_COOP_MULTITASKING) += thread.c
ramstage-$(CONFIG_TIMER_QUEUE) += timer_queue.c
ramstage-$(CONFIG_TERTIARY_BOARD_ID) += tristate_gpios.c
+ramstage-$(CONFIG_GENERIC_UDELAY) += timer.c
romstage-y += cbmem_common.c dynamic_cbmem.c
ramstage-y += cbmem_common.c dynamic_cbmem.c
diff --git a/src/soc/nvidia/tegra132/timer.c b/src/lib/timer.c
index ed1034004..a2edc5c96 100644
--- a/src/soc/nvidia/tegra132/timer.c
+++ b/src/lib/timer.c
@@ -22,16 +22,12 @@
#include <delay.h>
#include <thread.h>
-void init_timer(void)
-{
-}
-
void udelay(unsigned usec)
{
struct stopwatch sw;
/*
- * As the hardware clock granularity is in microseconds pad the
+ * As the timer granularity is in microseconds pad the
* requested delay by one to get at least >= requested usec delay.
*/
usec += 1;
@@ -40,6 +36,7 @@ void udelay(unsigned usec)
return;
stopwatch_init_usecs_expire(&sw, usec);
+
while (!stopwatch_expired(&sw))
;
}
diff --git a/src/soc/nvidia/tegra124/Kconfig b/src/soc/nvidia/tegra124/Kconfig
index 1680f4554..3ce368b95 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 6de142d4c..49669ebd8 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 83f499cbf..000000000
--- 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 <console/console.h>
-#include <timer.h>
-#include <delay.h>
-#include <thread.h>
-
-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(&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);
-}
-
diff --git a/src/soc/nvidia/tegra132/Kconfig b/src/soc/nvidia/tegra132/Kconfig
index c87698a8d..0a1b28be6 100644
--- a/src/soc/nvidia/tegra132/Kconfig
+++ b/src/soc/nvidia/tegra132/Kconfig
@@ -8,6 +8,7 @@ config SOC_NVIDIA_TEGRA132
select BOOTBLOCK_CONSOLE
select GIC
select HAVE_MONOTONIC_TIMER
+ select GENERIC_UDELAY
select HAVE_HARD_RESET
select HAVE_UART_SPECIAL
select HAVE_UART_MEMORY_MAPPED
diff --git a/src/soc/nvidia/tegra132/Makefile.inc b/src/soc/nvidia/tegra132/Makefile.inc
index 81d08f54d..8ad9b8305 100644
--- a/src/soc/nvidia/tegra132/Makefile.inc
+++ b/src/soc/nvidia/tegra132/Makefile.inc
@@ -1,7 +1,6 @@
bootblock-y += bootblock.c
bootblock-y += bootblock_asm.S
bootblock-y += cbfs.c
-bootblock-y += timer.c
bootblock-y += clock.c
bootblock-y += spi.c
bootblock-y += i2c.c
@@ -26,7 +25,6 @@ romstage-y += romstage_asm.S
romstage-y += addressmap.c
romstage-y += cbfs.c
romstage-y += cbmem.c
-romstage-y += timer.c
romstage-y += ccplex.c
romstage-y += clock.c
romstage-y += cpu.c
@@ -53,7 +51,6 @@ ramstage-y += cbfs.c
ramstage-y += cbmem.c
ramstage-y += cpu.c
ramstage-y += cpu_lib.S
-ramstage-y += timer.c
ramstage-y += clock.c
ramstage-y += soc.c
ramstage-y += spi.c
diff --git a/src/soc/rockchip/rk3288/Kconfig b/src/soc/rockchip/rk3288/Kconfig
index 0865fe8f5..70951a5fa 100644
--- a/src/soc/rockchip/rk3288/Kconfig
+++ b/src/soc/rockchip/rk3288/Kconfig
@@ -26,6 +26,7 @@ config SOC_ROCKCHIP_RK3288
select ARCH_RAMSTAGE_ARMV7
select CPU_HAS_BOOTBLOCK_INIT
select HAVE_MONOTONIC_TIMER
+ select GENERIC_UDELAY
select HAVE_UART_MEMORY_MAPPED
select HAVE_UART_SPECIAL
select BOOTBLOCK_CONSOLE
diff --git a/src/soc/rockchip/rk3288/timer.c b/src/soc/rockchip/rk3288/timer.c
index 716248240..658f4d74f 100644
--- a/src/soc/rockchip/rk3288/timer.c
+++ b/src/soc/rockchip/rk3288/timer.c
@@ -23,36 +23,9 @@
#include <soc/timer.h>
#include <timer.h>
-void init_timer(void)
-{
-}
-
void rk3288_init_timer(void)
{
write32(TIMER_LOAD_VAL, &timer7_ptr->timer_load_count0);
write32(TIMER_LOAD_VAL, &timer7_ptr->timer_load_count1);
write32(1, &timer7_ptr->timer_ctrl_reg);
}
-
-/* delay x useconds */
-void udelay(unsigned usec)
-{
- struct mono_time current, end;
-
- 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);
-}
-
diff --git a/src/soc/samsung/exynos5250/Kconfig b/src/soc/samsung/exynos5250/Kconfig
index 4126ec1e5..7034e9620 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 4483f820d..4cf2d9675 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 891c3d74c..000000000
--- 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 <console/console.h>
-#include <delay.h>
-#include <soc/clk.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;
-
- 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);
-}
diff --git a/src/soc/samsung/exynos5420/Kconfig b/src/soc/samsung/exynos5420/Kconfig
index ed9d2f8a8..072976a2a 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 eab4fb38c..4e92864d5 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 7156a010a..000000000
--- 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);
-}