mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 00:47:26 +00:00
35b65dd8ef
Historically, the reset_cpu() function had an `addr` parameter which was
meant to pass in an address of the reset vector location, where the CPU
should reset to. This feature is no longer used anywhere in U-Boot as
all reset_cpu() implementations now ignore the passed value. Generic
code has been added which always calls reset_cpu() with `0` which means
this feature can no longer be used easily anyway.
Over time, many implementations seem to have "misunderstood" the
existence of this parameter as a way to customize/parameterize the reset
(e.g. COLD vs WARM resets). As this is not properly supported, the
code will almost always not do what it is intended to (because all
call-sites just call reset_cpu() with 0).
To avoid confusion and to clean up the codebase from unused left-overs
of the past, remove the `addr` parameter entirely. Code which intends
to support different kinds of resets should be rewritten as a sysreset
driver instead.
This transformation was done with the following coccinelle patch:
@@
expression argvalue;
@@
- reset_cpu(argvalue)
+ reset_cpu()
@@
identifier argname;
type argtype;
@@
- reset_cpu(argtype argname)
+ reset_cpu(void)
{ ... }
Signed-off-by: Harald Seiler <hws@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
41 lines
908 B
C
41 lines
908 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2002
|
|
* Lineo, Inc. <www.lineo.com>
|
|
* Bernhard Kuhn <bkuhn@lineo.com>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Marius Groeger <mgroeger@sysgo.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Alex Zuepke <azu@sysgo.de>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <cpu_func.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/hardware.h>
|
|
#include <asm/arch/at91_st.h>
|
|
|
|
void __attribute__((weak)) board_reset(void)
|
|
{
|
|
/* true empty function for defining weak symbol */
|
|
}
|
|
|
|
void reset_cpu(void)
|
|
{
|
|
at91_st_t *st = (at91_st_t *) ATMEL_BASE_ST;
|
|
|
|
board_reset();
|
|
|
|
/* Reset the cpu by setting up the watchdog timer */
|
|
writel(AT91_ST_WDMR_RSTEN | AT91_ST_WDMR_EXTEN | AT91_ST_WDMR_WDV(2),
|
|
&st->wdmr);
|
|
writel(AT91_ST_CR_WDRST, &st->cr);
|
|
/* and let it timeout */
|
|
while (1)
|
|
;
|
|
/* Never reached */
|
|
}
|