5bcbd11b0d
Add timer driver for armada38x BUG=chrome-os-partner:47462 TEST=emerge-cyclone libpayload BRANCH=tot Change-Id: Iefb6d1fcb907edb54d55ba8addfb66329af6c3c7 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: cd467160ecab050a541a445c2afab9e6bc625635 Original-Change-Id: Id42bafdbc34295b6f8afe5610fb3bab0e0e1b6e8 Original-Signed-off-by: Ruilin Hao <rlhao@marvell.com> Original-Reviewed-on: https://chromium-review.googlesource.com/313343 Original-Commit-Ready: Kan Yan <kyan@google.com> Original-Tested-by: Kan Yan <kyan@google.com> Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org> Original-Reviewed-by: Yuji Sasaki <sasakiy@chromium.org> Reviewed-on: https://review.coreboot.org/13114 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
50 lines
2.1 KiB
C
50 lines
2.1 KiB
C
/*
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* Copyright 2015 Google 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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <libpayload.h>
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#include <libpayload-config.h>
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uint64_t timer_hz(void)
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{
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return CONFIG_LP_ARMADA38X_TIMER_FREQ;
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}
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uint64_t timer_raw_value(void)
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{
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static uint64_t total_ticks = 0;
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uint64_t overflow = 0;
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uint32_t current_ticks =
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0xffffffff - readl((void *)CONFIG_LP_ARMADA38X_TIMER_REG);
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/* It assumes only one overflow happened since the last call */
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if (current_ticks <= (uint32_t)total_ticks)
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overflow = 1ULL << 32;
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/* The least significant part(32 bits) of total_ticks will always
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* become equal to current ticks */
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total_ticks = (((total_ticks + overflow) >> 32) << 32) + current_ticks;
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return total_ticks;
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}
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