2f37bd6551
This patch is a raw application of the following spatch to src/: @@ expression A, V; @@ - writel(V, A) + write32(A, V) @@ expression A, V; @@ - writew(V, A) + write16(A, V) @@ expression A, V; @@ - writeb(V, A) + write8(A, V) @@ expression A; @@ - readl(A) + read32(A) @@ expression A; @@ - readb(A) + read8(A) BRANCH=none BUG=chromium:444723 TEST=None (depends on next patch) Change-Id: I5dd96490c85ee2bcbc669f08bc6fff0ecc0f9e27 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 64f643da95d85954c4d4ea91c34a5c69b9b08eb6 Original-Change-Id: I366a2eb5b3a0df2279ebcce572fe814894791c42 Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/254864 Reviewed-on: http://review.coreboot.org/9836 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2015 Google Inc.
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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 <arch/io.h>
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#include <delay.h>
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#include <soc/addressmap.h>
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#include <timer.h>
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#define TIMER_GLB_TIM_CTRL_PRESC_MASK 0x0000FF00
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#define TIMER_GLB_TIM_CTRL_TIM_EN 0x00000001
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#define TIMER_GLB_TIM_CTRL_PRESC 0x0
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/*
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* arm clk is 1GHz, periph_clk=arm_clk/2, tick per usec.
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* arm clk is set by the bootrom. See util/broadcom/unauth.cfg for details.
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*/
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#define PERIPH_CLOCK 500
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#define CLOCKS_PER_USEC (PERIPH_CLOCK / \
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(((TIMER_GLB_TIM_CTRL_PRESC & TIMER_GLB_TIM_CTRL_PRESC_MASK) >> 8) + 1))
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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 *)IPROC_PERIPH_GLB_TIM_REG_BASE;
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static inline 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 = read32(&timer_ptr->gtim_glob_hi);
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count_l = read32(&timer_ptr->gtim_glob_low);
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cur_tick = read32(&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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void timer_monotonic_get(struct mono_time *mt)
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{
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mono_time_set_usecs(mt, timer_raw_value() / CLOCKS_PER_USEC);
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}
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void init_timer(void)
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{
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write32(&timer_ptr->gtim_glob_ctrl, TIMER_GLB_TIM_CTRL_PRESC);
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write32(&timer_ptr->gtim_glob_low, 0);
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write32(&timer_ptr->gtim_glob_hi, 0);
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write32(&timer_ptr->gtim_glob_ctrl, TIMER_GLB_TIM_CTRL_TIM_EN);
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}
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