8b0271dd2c
Qemu implements HPET so that it is connected to IRQ 2, which makes necessary to use it in legacy emulation mode. Add legacy emulation mode to HPET driver. Change the way the HPET driver is initialized. QEMU requires that the mode (one shot or periodic) gets set prior loading comparator value. Add debugging mode to HPET driver to ease the next port. Change-Id: I668325d5968451585519a08b6c41863cf6e37f88 Signed-off-by: Dmitriy Korovkin <dmitriy.korovkin@windriver.com>
91 lines
2.8 KiB
Plaintext
91 lines
2.8 KiB
Plaintext
# Kconfig - timer driver configuration options
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#
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# Copyright (c) 2014-2015 Wind River Systems, Inc.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1) Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2) Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# 3) Neither the name of Wind River Systems nor the names of its contributors
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# may be used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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menu "Timer Drivers"
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config HPET_TIMER
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bool "HPET timer"
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default n
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depends on IOAPIC && X86_32
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help
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This option selects High Precision Event Timer (HPET) as a
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system timer.
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config HPET_TIMER_LEGACY_EMULATION
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bool "HPET timer legacy emulation mode"
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default n
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depends on HPET_TIMER
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help
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This option switches HPET to legacy emulation mode.
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In this mode 8254 PIT is disabled, HPET timer0 is connected
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to IOAPIC IRQ2, timer1 -- to IOAPIC IRQ8.
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config HPET_TIMER_DEBUG
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bool "Enable HPET debug output"
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default n
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depends on HPET_TIMER && PRINTK
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help
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This option enables HPET debugging output.
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config LOAPIC_TIMER
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bool "LOAPIC timer"
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depends on LOAPIC && X86_32
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default n
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help
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This option selects LOAPIC timer as a system timer.
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config PIT
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bool "PIT (i8253)"
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default n
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depends on PIC && X86_32
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help
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This option selects legacy i8253 timer as system timer.
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config ARCV2_TIMER
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bool "ARC Timer"
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default y
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depends on ARC
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help
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This module implements a kernel device driver for the ARCv2 processor timer 0
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and provides the standard "system clock driver" interfaces.
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config CORTEX_M_TIMER
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bool "Cortex-M Timer"
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default y
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depends on CPU_CORTEX_M
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help
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This module implements a kernel device driver for the Cortex-M processor
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systick timer and provides the standard "system clock driver" interfaces.
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endmenu
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