#define SYSCISR_RETRIES 1000
#define SYSCISR_DELAY_US 1
-#ifdef CONFIG_PM
+#if defined(CONFIG_PM) || defined(CONFIG_SMP)
+
+static DEFINE_SPINLOCK(r8a7779_sysc_lock); /* SMP CPUs + I/O devices */
static int r8a7779_sysc_pwr_on_off(struct r8a7779_pm_ch *r8a7779_ch,
int sr_bit, int reg_offs)
unsigned int isr_mask = 1 << r8a7779_ch->isr_bit;
unsigned int chan_mask = 1 << r8a7779_ch->chan_bit;
unsigned int status;
+ unsigned long flags;
int ret = 0;
int k;
+ spin_lock_irqsave(&r8a7779_sysc_lock, flags);
+
iowrite32(isr_mask, r8a7779_sysc_base + SYSCISCR);
do {
iowrite32(isr_mask, r8a7779_sysc_base + SYSCISCR);
out:
+ spin_unlock_irqrestore(&r8a7779_sysc_lock, flags);
+
pr_debug("r8a7779 power domain %d: %02x %02x %02x %02x %02x -> %d\n",
r8a7779_ch->isr_bit, ioread32(r8a7779_sysc_base + PWRSR0),
ioread32(r8a7779_sysc_base + PWRSR1),
return ret;
}
-static int r8a7779_sysc_power_down(struct r8a7779_pm_ch *r8a7779_ch)
+int r8a7779_sysc_power_down(struct r8a7779_pm_ch *r8a7779_ch)
{
return r8a7779_sysc_update(r8a7779_ch, r8a7779_sysc_pwr_off);
}
-static int r8a7779_sysc_power_up(struct r8a7779_pm_ch *r8a7779_ch)
+int r8a7779_sysc_power_up(struct r8a7779_pm_ch *r8a7779_ch)
{
return r8a7779_sysc_update(r8a7779_ch, r8a7779_sysc_pwr_on);
}
iowrite32(0, r8a7779_sysc_base + SYSCIMR);
}
+#else /* CONFIG_PM || CONFIG_SMP */
+
+static inline void r8a7779_sysc_init(void) {}
+
+#endif /* CONFIG_PM || CONFIG_SMP */
+
+#ifdef CONFIG_PM
+
static int pd_power_down(struct generic_pm_domain *genpd)
{
return r8a7779_sysc_power_down(to_r8a7779_ch(genpd));
}
};
-#else /* CONFIG_PM */
-
-static inline void r8a7779_sysc_init(void) {}
-
#endif /* CONFIG_PM */
void __init r8a7779_pm_init(void)
{
- r8a7779_sysc_init();
+ static int once;
+
+ if (!once++)
+ r8a7779_sysc_init();
}
--- /dev/null
+/*
+ * SMP support for R-Mobile / SH-Mobile - r8a7779 portion
+ *
+ * Copyright (C) 2011 Renesas Solutions Corp.
+ * Copyright (C) 2011 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.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#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 <mach/common.h>
+#include <mach/r8a7779.h>
+#include <asm/smp_scu.h>
+#include <asm/smp_twd.h>
+#include <asm/hardware/gic.h>
+
+#define AVECR 0xfe700040
+
+static struct r8a7779_pm_ch r8a7779_ch_cpu1 = {
+ .chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
+ .chan_bit = 1, /* ARM1 */
+ .isr_bit = 1, /* ARM1 */
+};
+
+static struct r8a7779_pm_ch r8a7779_ch_cpu2 = {
+ .chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
+ .chan_bit = 2, /* ARM2 */
+ .isr_bit = 2, /* ARM2 */
+};
+
+static struct r8a7779_pm_ch r8a7779_ch_cpu3 = {
+ .chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
+ .chan_bit = 3, /* ARM3 */
+ .isr_bit = 3, /* ARM3 */
+};
+
+static struct r8a7779_pm_ch *r8a7779_ch_cpu[4] = {
+ [1] = &r8a7779_ch_cpu1,
+ [2] = &r8a7779_ch_cpu2,
+ [3] = &r8a7779_ch_cpu3,
+};
+
+static void __iomem *scu_base_addr(void)
+{
+ return (void __iomem *)0xf0000000;
+}
+
+static DEFINE_SPINLOCK(scu_lock);
+static unsigned long tmp;
+
+static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
+{
+ void __iomem *scu_base = scu_base_addr();
+
+ spin_lock(&scu_lock);
+ tmp = __raw_readl(scu_base + 8);
+ tmp &= ~clr;
+ tmp |= set;
+ spin_unlock(&scu_lock);
+
+ /* disable cache coherency after releasing the lock */
+ __raw_writel(tmp, scu_base + 8);
+}
+
+unsigned int __init r8a7779_get_core_count(void)
+{
+ void __iomem *scu_base = scu_base_addr();
+
+#ifdef CONFIG_HAVE_ARM_TWD
+ /* twd_base needs to be initialized before percpu_timer_setup() */
+ twd_base = (void __iomem *)0xf0000600;
+#endif
+
+ return scu_get_core_count(scu_base);
+}
+
+int r8a7779_platform_cpu_kill(unsigned int cpu)
+{
+ struct r8a7779_pm_ch *ch = NULL;
+ int ret = -EIO;
+
+ cpu = cpu_logical_map(cpu);
+
+ /* disable cache coherency */
+ modify_scu_cpu_psr(3 << (cpu * 8), 0);
+
+ if (cpu < ARRAY_SIZE(r8a7779_ch_cpu))
+ ch = r8a7779_ch_cpu[cpu];
+
+ if (ch)
+ ret = r8a7779_sysc_power_down(ch);
+
+ return ret ? ret : 1;
+}
+
+void __cpuinit r8a7779_secondary_init(unsigned int cpu)
+{
+ gic_secondary_init(0);
+}
+
+int __cpuinit r8a7779_boot_secondary(unsigned int cpu)
+{
+ struct r8a7779_pm_ch *ch = NULL;
+ int ret = -EIO;
+
+ cpu = cpu_logical_map(cpu);
+
+ /* enable cache coherency */
+ modify_scu_cpu_psr(0, 3 << (cpu * 8));
+
+ if (cpu < ARRAY_SIZE(r8a7779_ch_cpu))
+ ch = r8a7779_ch_cpu[cpu];
+
+ if (ch)
+ ret = r8a7779_sysc_power_up(ch);
+
+ return ret;
+}
+
+void __init r8a7779_smp_prepare_cpus(void)
+{
+ int cpu = cpu_logical_map(0);
+
+ scu_enable(scu_base_addr());
+
+ /* Map the reset vector (in headsmp.S) */
+ __raw_writel(__pa(shmobile_secondary_vector), __io(AVECR));
+
+ /* enable cache coherency on CPU0 */
+ modify_scu_cpu_psr(0, 3 << (cpu * 8));
+
+ r8a7779_pm_init();
+
+ /* power off secondary CPUs */
+ r8a7779_platform_cpu_kill(1);
+ r8a7779_platform_cpu_kill(2);
+ r8a7779_platform_cpu_kill(3);
+}
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff