From 10ebd8556b7990499c896a550e3d416b444211e6 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 02:23:07 +0000
Subject: [PATCH] add led
---
kernel/arch/parisc/kernel/process.c | 61 ++++++++----------------------
1 files changed, 16 insertions(+), 45 deletions(-)
diff --git a/kernel/arch/parisc/kernel/process.c b/kernel/arch/parisc/kernel/process.c
index 97c2067..c14ee40 100644
--- a/kernel/arch/parisc/kernel/process.c
+++ b/kernel/arch/parisc/kernel/process.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* PARISC Architecture-dependent parts of process handling
* based on the work for i386
@@ -15,21 +16,6 @@
* Copyright (C) 2001-2002 Ryan Bradetich <rbrad at parisc-linux.org>
* Copyright (C) 2001-2014 Helge Deller <deller@gmx.de>
* Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org>
- *
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdarg.h>
@@ -61,7 +47,6 @@
#include <asm/assembly.h>
#include <asm/pdc.h>
#include <asm/pdc_chassis.h>
-#include <asm/pgalloc.h>
#include <asm/unwind.h>
#include <asm/sections.h>
@@ -138,13 +123,18 @@
/* It seems we have no way to power the system off via
* software. The user has to press the button himself. */
- printk(KERN_EMERG "System shut down completed.\n"
- "Please power this system off now.");
+ printk("Power off or press RETURN to reboot.\n");
/* prevent soft lockup/stalled CPU messages for endless loop. */
rcu_sysrq_start();
lockup_detector_soft_poweroff();
- for (;;);
+ while (1) {
+ /* reboot if user presses RETURN key */
+ if (pdc_iodc_getc() == 13) {
+ printk("Rebooting...\n");
+ machine_restart(NULL);
+ }
+ }
}
void (*pm_power_off)(void);
@@ -167,32 +157,13 @@
}
/*
- * Fill in the FPU structure for a core dump.
- */
-
-int dump_fpu (struct pt_regs * regs, elf_fpregset_t *r)
-{
- if (regs == NULL)
- return 0;
-
- memcpy(r, regs->fr, sizeof *r);
- return 1;
-}
-
-int dump_task_fpu (struct task_struct *tsk, elf_fpregset_t *r)
-{
- memcpy(r, tsk->thread.regs.fr, sizeof(*r));
- return 1;
-}
-
-/*
* Idle thread support
*
* Detect when running on QEMU with SeaBIOS PDC Firmware and let
* QEMU idle the host too.
*/
-int running_on_qemu __read_mostly;
+int running_on_qemu __ro_after_init;
EXPORT_SYMBOL(running_on_qemu);
void __cpuidle arch_cpu_idle_dead(void)
@@ -203,7 +174,7 @@
void __cpuidle arch_cpu_idle(void)
{
- local_irq_enable();
+ raw_local_irq_enable();
/* nop on real hardware, qemu will idle sleep. */
asm volatile("or %%r10,%%r10,%%r10\n":::);
@@ -223,7 +194,7 @@
*/
int
copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long kthread_arg, struct task_struct *p)
+ unsigned long kthread_arg, struct task_struct *p, unsigned long tls)
{
struct pt_regs *cregs = &(p->thread.regs);
void *stack = task_stack_page(p);
@@ -234,7 +205,7 @@
extern void * const ret_from_kernel_thread;
extern void * const child_return;
- if (unlikely(p->flags & PF_KTHREAD)) {
+ if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
/* kernel thread */
memset(cregs, 0, sizeof(struct pt_regs));
if (!usp) /* idle thread */
@@ -268,9 +239,9 @@
cregs->ksp = (unsigned long)stack + THREAD_SZ_ALGN + FRAME_SIZE;
cregs->kpc = (unsigned long) &child_return;
- /* Setup thread TLS area from the 4th parameter in clone */
+ /* Setup thread TLS area */
if (clone_flags & CLONE_SETTLS)
- cregs->cr27 = cregs->gr[23];
+ cregs->cr27 = tls;
}
return 0;
@@ -307,7 +278,7 @@
Elf64_Fdesc *desc = ptr;
void *p;
- if (!probe_kernel_address(&desc->addr, p))
+ if (!get_kernel_nofault(p, (void *)&desc->addr))
ptr = p;
return ptr;
}
--
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