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bootstage: Require timer_get_boot_us() to be defined

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At present we provide a default version of this function for use by
bootstage. However it uses the system timer and therefore likely requires
driver model. This makes it impossible to time driver-model init.

Drop the function and require boards to provide their own. Add a sandbox
version also. There is a default implememtation in lib/time.c for boards
which use CONFIG_SYS_TIMER_COUNTER.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2017-05-22 05:05:23 -06:00 • committed by Tom Rini
parent 9fb34b01f7
commit c87dc38d8f
3 changed files with 14 additions and 19 deletions
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11
arch/sandbox/cpu/cpu.c
View file

@ -139,3 +139,14 @@ done:
return 0;
}
ulong timer_get_boot_us(void)
{
static uint64_t base_count;
uint64_t count = os_get_nsec();
if (!base_count)
base_count = count;
return (count - base_count) / 1000;
}

19
common/bootstage.c
View file

@ -8,7 +8,7 @@
/*
* This module records the progress of boot and arbitrary commands, and
* permits accurate timestamping of each.
*
*
* TBD: Pass timings to kernel in the FDT
*/
@ -292,23 +292,6 @@ void bootstage_report(void)
}
}
ulong __timer_get_boot_us(void)
{
static ulong base_time;
/*
* We can't implement this properly. Return 0 on the first call and
* larger values after that.
*/
if (base_time)
return get_timer(base_time) * 1000;
base_time = get_timer(0);
return 0;
}
ulong timer_get_boot_us(void)
__attribute__((weak, alias("__timer_get_boot_us")));
/**
* Append data to a memory buffer
*

3
include/bootstage.h
View file

@ -2,6 +2,7 @@
* This file implements recording of each stage of the boot process. It is
* intended to implement timing of each stage, reporting this information
* to the user and passing it to the OS for logging / further analysis.
* Note that it requires timer_get_boot_us() to be defined by the board
*
* Copyright (c) 2011 The Chromium OS Authors.
*
@ -209,7 +210,7 @@ enum bootstage_id {
/*
* Return the time since boot in microseconds, This is needed for bootstage
* and should be defined in CPU- or board-specific code. If undefined then
* millisecond resolution will be used (the standard get_timer()).
* you will get a link error.
*/
ulong timer_get_boot_us(void);