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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/mach-shmobile/smp-emev2.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
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 <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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 <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/mach-shmobile/smp-emev2.c')
-rw-r--r-- | kernel/arch/arm/mach-shmobile/smp-emev2.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-shmobile/smp-emev2.c b/kernel/arch/arm/mach-shmobile/smp-emev2.c new file mode 100644 index 000000000..baff3b5ef --- /dev/null +++ b/kernel/arch/arm/mach-shmobile/smp-emev2.c @@ -0,0 +1,55 @@ +/* + * SMP support for Emma Mobile EV2 + * + * Copyright (C) 2012 Renesas Solutions Corp. + * Copyright (C) 2012 Magnus Damm + * + * 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; version 2 of the License. + * + * 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. + */ +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/smp.h> +#include <linux/spinlock.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <asm/smp_plat.h> +#include <asm/smp_scu.h> +#include "common.h" + +#define EMEV2_SCU_BASE 0x1e000000 +#define EMEV2_SMU_BASE 0xe0110000 +#define SMU_GENERAL_REG0 0x7c0 + +static int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle) +{ + arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu))); + return 0; +} + +static void __init emev2_smp_prepare_cpus(unsigned int max_cpus) +{ + void __iomem *smu; + + /* Tell ROM loader about our vector (in headsmp.S) */ + smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE); + if (smu) { + iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0); + iounmap(smu); + } + + /* setup EMEV2 specific SCU bits */ + shmobile_scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE); + shmobile_smp_scu_prepare_cpus(max_cpus); +} + +struct smp_operations emev2_smp_ops __initdata = { + .smp_prepare_cpus = emev2_smp_prepare_cpus, + .smp_boot_secondary = emev2_boot_secondary, +}; |