From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/powerpc/platforms/pasemi/idle.c | 102 ++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 kernel/arch/powerpc/platforms/pasemi/idle.c (limited to 'kernel/arch/powerpc/platforms/pasemi/idle.c') diff --git a/kernel/arch/powerpc/platforms/pasemi/idle.c b/kernel/arch/powerpc/platforms/pasemi/idle.c new file mode 100644 index 000000000..75b296bc5 --- /dev/null +++ b/kernel/arch/powerpc/platforms/pasemi/idle.c @@ -0,0 +1,102 @@ +/* + * Copyright (C) 2006-2007 PA Semi, Inc + * + * Maintained by: Olof Johansson + * + * 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 + * + */ + +#undef DEBUG + +#include +#include +#include + +#include +#include +#include + +#include "pasemi.h" + +struct sleep_mode { + char *name; + void (*entry)(void); +}; + +static struct sleep_mode modes[] = { + { .name = "spin", .entry = &idle_spin }, + { .name = "doze", .entry = &idle_doze }, +}; + +static int current_mode = 0; + +static int pasemi_system_reset_exception(struct pt_regs *regs) +{ + /* If we were woken up from power savings, we need to return + * to the calling function, since nip is not saved across + * all modes. + */ + + if (regs->msr & SRR1_WAKEMASK) + regs->nip = regs->link; + + switch (regs->msr & SRR1_WAKEMASK) { + case SRR1_WAKEEE: + do_IRQ(regs); + break; + case SRR1_WAKEDEC: + timer_interrupt(regs); + break; + default: + /* do system reset */ + return 0; + } + + /* Set higher astate since we come out of power savings at 0 */ + restore_astate(hard_smp_processor_id()); + + /* everything handled */ + regs->msr |= MSR_RI; + return 1; +} + +static int __init pasemi_idle_init(void) +{ +#ifndef CONFIG_PPC_PASEMI_CPUFREQ + printk(KERN_WARNING "No cpufreq driver, powersavings modes disabled\n"); + current_mode = 0; +#endif + + ppc_md.system_reset_exception = pasemi_system_reset_exception; + ppc_md.power_save = modes[current_mode].entry; + printk(KERN_INFO "Using PA6T idle loop (%s)\n", modes[current_mode].name); + + return 0; +} +machine_late_initcall(pasemi, pasemi_idle_init); + +static int __init idle_param(char *p) +{ + int i; + for (i = 0; i < ARRAY_SIZE(modes); i++) { + if (!strcmp(modes[i].name, p)) { + current_mode = i; + break; + } + } + return 0; +} + +early_param("idle", idle_param); -- cgit 1.2.3-korg