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https://github.com/AsahiLinux/u-boot
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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>
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2002
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* Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
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*
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* Copyright (C) 2011 Andes Technology Corporation
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* Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
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* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
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*/
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/* CPU specific code */
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#include <common.h>
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#include <command.h>
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#include <cpu_func.h>
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#include <irq_func.h>
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#include <watchdog.h>
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#include <asm/cache.h>
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#include <faraday/ftwdt010_wdt.h>
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/*
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* cleanup_before_linux() is called just before we call linux
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* it prepares the processor for linux
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*
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* we disable interrupt and caches.
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*/
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int cleanup_before_linux(void)
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{
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disable_interrupts();
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/* turn off I/D-cache */
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cache_flush();
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icache_disable();
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dcache_disable();
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return 0;
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}
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int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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disable_interrupts();
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/*
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* reset to the base addr of andesboot.
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* currently no ROM loader at addr 0.
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* do not use reset_cpu();
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*/
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#ifdef CONFIG_FTWDT010_WATCHDOG
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/*
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* workaround: if we use CONFIG_HW_WATCHDOG with ftwdt010, will lead
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* automatic hardware reset when booting Linux.
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* Please do not use CONFIG_HW_WATCHDOG and WATCHDOG_RESET() here.
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*/
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ftwdt010_wdt_reset();
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while (1)
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;
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#endif /* CONFIG_FTWDT010_WATCHDOG */
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/*NOTREACHED*/
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}
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