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01476eaf07
Add support for the early timer so we can use tracing with sandbox again. Signed-off-by: Simon Glass <sjg@chromium.org>
72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
/*
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* Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <timer.h>
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#include <os.h>
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#define SANDBOX_TIMER_RATE 1000000
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/* system timer offset in ms */
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static unsigned long sandbox_timer_offset;
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void sandbox_timer_add_offset(unsigned long offset)
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{
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sandbox_timer_offset += offset;
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}
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u64 notrace timer_early_get_count(void)
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{
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return os_get_nsec() / 1000 + sandbox_timer_offset * 1000;
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}
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unsigned long notrace timer_early_get_rate(void)
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{
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return SANDBOX_TIMER_RATE;
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}
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static notrace int sandbox_timer_get_count(struct udevice *dev, u64 *count)
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{
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*count = timer_early_get_count();
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return 0;
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}
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static int sandbox_timer_probe(struct udevice *dev)
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{
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struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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if (!uc_priv->clock_rate)
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uc_priv->clock_rate = SANDBOX_TIMER_RATE;
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return 0;
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}
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static const struct timer_ops sandbox_timer_ops = {
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.get_count = sandbox_timer_get_count,
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};
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static const struct udevice_id sandbox_timer_ids[] = {
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{ .compatible = "sandbox,timer" },
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{ }
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};
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U_BOOT_DRIVER(sandbox_timer) = {
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.name = "sandbox_timer",
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.id = UCLASS_TIMER,
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.of_match = sandbox_timer_ids,
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.probe = sandbox_timer_probe,
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.ops = &sandbox_timer_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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/* This is here in case we don't have a device tree */
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U_BOOT_DEVICE(sandbox_timer_non_fdt) = {
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.name = "sandbox_timer",
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};
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