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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>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2012-2019, NVIDIA CORPORATION. All rights reserved.
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*
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* Derived from code (arch/arm/lib/reset.c) that is:
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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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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.de>
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*
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* (C) Copyright 2002
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* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
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*
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* (C) Copyright 2004
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* DAVE Srl
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* http://www.dave-tech.it
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* http://www.wawnet.biz
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* mailto:info@wawnet.biz
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*
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* (C) Copyright 2004 Texas Insturments
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*/
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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 <asm/arch/tegra.h>
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#include <asm/arch-tegra/pmc.h>
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#include <linux/delay.h>
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static int do_enterrcm(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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puts("Entering RCM...\n");
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udelay(50000);
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tegra_pmc_writel(2, PMC_SCRATCH0);
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disable_interrupts();
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reset_cpu();
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return 0;
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}
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U_BOOT_CMD(
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enterrcm, 1, 0, do_enterrcm,
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"reset Tegra and enter USB Recovery Mode",
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""
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);
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