mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-23 19:43:33 +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>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2012-2019, NVIDIA CORPORATION. All rights reserved.
|
|
*
|
|
* Derived from code (arch/arm/lib/reset.c) that is:
|
|
*
|
|
* (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>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
|
|
*
|
|
* (C) Copyright 2004
|
|
* DAVE Srl
|
|
* http://www.dave-tech.it
|
|
* http://www.wawnet.biz
|
|
* mailto:info@wawnet.biz
|
|
*
|
|
* (C) Copyright 2004 Texas Insturments
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <cpu_func.h>
|
|
#include <irq_func.h>
|
|
#include <asm/arch/tegra.h>
|
|
#include <asm/arch-tegra/pmc.h>
|
|
#include <linux/delay.h>
|
|
|
|
static int do_enterrcm(struct cmd_tbl *cmdtp, int flag, int argc,
|
|
char *const argv[])
|
|
{
|
|
puts("Entering RCM...\n");
|
|
udelay(50000);
|
|
|
|
tegra_pmc_writel(2, PMC_SCRATCH0);
|
|
disable_interrupts();
|
|
reset_cpu();
|
|
|
|
return 0;
|
|
}
|
|
|
|
U_BOOT_CMD(
|
|
enterrcm, 1, 0, do_enterrcm,
|
|
"reset Tegra and enter USB Recovery Mode",
|
|
""
|
|
);
|