mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-29 13:28:52 +09:00
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>
40 lines
818 B
C
40 lines
818 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2009
|
|
* Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <cpu_func.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/hardware.h>
|
|
#include <asm/arch/spr_syscntl.h>
|
|
#include <linux/delay.h>
|
|
|
|
void reset_cpu(void)
|
|
{
|
|
struct syscntl_regs *syscntl_regs_p =
|
|
(struct syscntl_regs *)CONFIG_SPEAR_SYSCNTLBASE;
|
|
|
|
printf("System is going to reboot ...\n");
|
|
|
|
/*
|
|
* This 1 second delay will allow the above message
|
|
* to be printed before reset
|
|
*/
|
|
udelay((1000 * 1000));
|
|
|
|
/* Going into slow mode before resetting SOC */
|
|
writel(0x02, &syscntl_regs_p->scctrl);
|
|
|
|
/*
|
|
* Writing any value to the system status register will
|
|
* reset the SoC
|
|
*/
|
|
writel(0x00, &syscntl_regs_p->scsysstat);
|
|
|
|
/* system will restart */
|
|
while (1)
|
|
;
|
|
}
|