7ab46f8085
BUG=chrome-os-partner:36011 BRANCH=broadcom-firmware TEST=measured 10 seconds in depthcharge: Starting depthcharge on purin... dpch: time 10 9 8 7 6 5 4 3 2 1 0 Change-Id: I0bcb01c255b19518bb8440111ac81f056c07ed69 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: f5993bd400dd5d38e62d07bc8ce3513175e0d518 Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org> Original-Reviewed-on: https://chrome-internal-review.googlesource.com/200569 Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Original-Commit-Queue: Daisuke Nojiri <dnojiri@google.com> Original-Tested-by: Daisuke Nojiri <dnojiri@google.com> Original-Change-Id: Id83aae29cec6320d897e0b231d023a9ee885903e Original-Reviewed-on: https://chromium-review.googlesource.com/256415 Reviewed-on: http://review.coreboot.org/9850 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2015 Google Electronics
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <libpayload.h>
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struct cygnus_timer {
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u32 gtim_glob_low;
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u32 gtim_glob_hi;
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u32 gtim_glob_ctrl;
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};
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static struct cygnus_timer * const timer_ptr =
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(void *)CONFIG_LP_IPROC_PERIPH_GLB_TIM_REG_BASE;
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uint64_t timer_hz(void)
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{
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/*
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* this is set up by coreboot as follows:
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*
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* PERIPH_CLOCK /
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* (((TIMER_GLB_TIM_CTRL_PRESC & TIMER_GLB_TIM_CTRL_PRESC_MASK)>>8) + 1)
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*
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* where PERIPH_CLOCK is typically 500000000.
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*/
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return 500000000;
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}
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uint64_t timer_raw_value(void)
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{
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uint64_t cur_tick;
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uint32_t count_h;
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uint32_t count_l;
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do {
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count_h = readl(&timer_ptr->gtim_glob_hi);
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count_l = readl(&timer_ptr->gtim_glob_low);
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cur_tick = readl(&timer_ptr->gtim_glob_hi);
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} while (cur_tick != count_h);
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return (cur_tick << 32) + count_l;
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}
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