mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-09 12:46:17 +09:00
5a07abb370
Add a psci_system_reset() which calls the SYSTEM_RESET function of PSCI 0.2 and can be used by boards that support it to implement reset_cpu(). Signed-off-by: Beniamino Galvani <b.galvani@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
92 lines
1.7 KiB
C
92 lines
1.7 KiB
C
/**
|
|
* (C) Copyright 2014, Cavium Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
**/
|
|
|
|
#include <asm-offsets.h>
|
|
#include <config.h>
|
|
#include <version.h>
|
|
#include <asm/macro.h>
|
|
#include <asm/psci.h>
|
|
#include <asm/system.h>
|
|
|
|
/*
|
|
* Issue the hypervisor call
|
|
*
|
|
* x0~x7: input arguments
|
|
* x0~x3: output arguments
|
|
*/
|
|
void hvc_call(struct pt_regs *args)
|
|
{
|
|
asm volatile(
|
|
"ldr x0, %0\n"
|
|
"ldr x1, %1\n"
|
|
"ldr x2, %2\n"
|
|
"ldr x3, %3\n"
|
|
"ldr x4, %4\n"
|
|
"ldr x5, %5\n"
|
|
"ldr x6, %6\n"
|
|
"ldr x7, %7\n"
|
|
"hvc #0\n"
|
|
"str x0, %0\n"
|
|
"str x1, %1\n"
|
|
"str x2, %2\n"
|
|
"str x3, %3\n"
|
|
: "+m" (args->regs[0]), "+m" (args->regs[1]),
|
|
"+m" (args->regs[2]), "+m" (args->regs[3])
|
|
: "m" (args->regs[4]), "m" (args->regs[5]),
|
|
"m" (args->regs[6]), "m" (args->regs[7])
|
|
: "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
|
|
"x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
|
|
"x16", "x17");
|
|
}
|
|
|
|
/*
|
|
* void smc_call(arg0, arg1...arg7)
|
|
*
|
|
* issue the secure monitor call
|
|
*
|
|
* x0~x7: input arguments
|
|
* x0~x3: output arguments
|
|
*/
|
|
|
|
void smc_call(struct pt_regs *args)
|
|
{
|
|
asm volatile(
|
|
"ldr x0, %0\n"
|
|
"ldr x1, %1\n"
|
|
"ldr x2, %2\n"
|
|
"ldr x3, %3\n"
|
|
"ldr x4, %4\n"
|
|
"ldr x5, %5\n"
|
|
"ldr x6, %6\n"
|
|
"smc #0\n"
|
|
"str x0, %0\n"
|
|
"str x1, %1\n"
|
|
"str x2, %2\n"
|
|
"str x3, %3\n"
|
|
: "+m" (args->regs[0]), "+m" (args->regs[1]),
|
|
"+m" (args->regs[2]), "+m" (args->regs[3])
|
|
: "m" (args->regs[4]), "m" (args->regs[5]),
|
|
"m" (args->regs[6])
|
|
: "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
|
|
"x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
|
|
"x16", "x17");
|
|
}
|
|
|
|
void __noreturn psci_system_reset(bool conduit_smc)
|
|
{
|
|
struct pt_regs regs;
|
|
|
|
regs.regs[0] = ARM_PSCI_0_2_FN_SYSTEM_RESET;
|
|
|
|
if (conduit_smc)
|
|
smc_call(®s);
|
|
else
|
|
hvc_call(®s);
|
|
|
|
while (1)
|
|
;
|
|
}
|