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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 136 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000436.384967451@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2006-2007 PA Semi, Inc
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*
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* Maintained by: Olof Johansson <olof@lixom.net>
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*/
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#undef DEBUG
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/irq.h>
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#include <asm/machdep.h>
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#include <asm/reg.h>
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#include <asm/smp.h>
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#include "pasemi.h"
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struct sleep_mode {
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char *name;
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void (*entry)(void);
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};
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static struct sleep_mode modes[] = {
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{ .name = "spin", .entry = &idle_spin },
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{ .name = "doze", .entry = &idle_doze },
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};
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static int current_mode = 0;
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static int pasemi_system_reset_exception(struct pt_regs *regs)
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{
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/* If we were woken up from power savings, we need to return
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* to the calling function, since nip is not saved across
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* all modes.
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*/
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if (regs->msr & SRR1_WAKEMASK)
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regs->nip = regs->link;
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switch (regs->msr & SRR1_WAKEMASK) {
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case SRR1_WAKEDEC:
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set_dec(1);
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case SRR1_WAKEEE:
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/*
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* Handle these when interrupts get re-enabled and we take
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* them as regular exceptions. We are in an NMI context
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* and can't handle these here.
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*/
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break;
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default:
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/* do system reset */
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return 0;
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}
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/* Set higher astate since we come out of power savings at 0 */
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restore_astate(hard_smp_processor_id());
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/* everything handled */
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regs->msr |= MSR_RI;
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return 1;
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}
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static int __init pasemi_idle_init(void)
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{
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#ifndef CONFIG_PPC_PASEMI_CPUFREQ
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pr_warn("No cpufreq driver, powersavings modes disabled\n");
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current_mode = 0;
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#endif
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ppc_md.system_reset_exception = pasemi_system_reset_exception;
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ppc_md.power_save = modes[current_mode].entry;
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pr_info("Using PA6T idle loop (%s)\n", modes[current_mode].name);
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return 0;
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}
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machine_late_initcall(pasemi, pasemi_idle_init);
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static int __init idle_param(char *p)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(modes); i++) {
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if (!strcmp(modes[i].name, p)) {
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current_mode = i;
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break;
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}
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}
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return 0;
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}
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early_param("idle", idle_param);
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