Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 80 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/smp-r8a7779.c b/arch/arm/mach-shmobile/smp-r8a7779.c
new file mode 100644
index 0000000000..1bc609986c
--- /dev/null
+++ b/arch/arm/mach-shmobile/smp-r8a7779.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SMP support for R-Mobile / SH-Mobile - r8a7779 portion
+ *
+ * Copyright (C) 2011  Renesas Solutions Corp.
+ * Copyright (C) 2011  Magnus Damm
+ */
+#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 <linux/soc/renesas/rcar-sysc.h>
+
+#include <asm/cacheflush.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
+#include "common.h"
+#include "r8a7779.h"
+
+#define HPBREG_BASE		0xfe700000
+#define AVECR			0x0040	/* ARM Reset Vector Address Register */
+
+#define R8A7779_SCU_BASE	0xf0000000
+
+static int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	int ret = -EIO;
+
+	cpu = cpu_logical_map(cpu);
+	if (cpu)
+		ret = rcar_sysc_power_up_cpu(cpu);
+
+	return ret;
+}
+
+static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus)
+{
+	void __iomem *base = ioremap(HPBREG_BASE, 0x1000);
+
+	/* Map the reset vector (in headsmp-scu.S, headsmp.S) */
+	writel(__pa(shmobile_boot_vector), base + AVECR);
+
+	/* setup r8a7779 specific SCU bits */
+	shmobile_smp_scu_prepare_cpus(R8A7779_SCU_BASE, max_cpus);
+
+	iounmap(base);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static int r8a7779_platform_cpu_kill(unsigned int cpu)
+{
+	int ret = -EIO;
+
+	cpu = cpu_logical_map(cpu);
+	if (cpu)
+		ret = rcar_sysc_power_down_cpu(cpu);
+
+	return ret ? ret : 1;
+}
+
+static int r8a7779_cpu_kill(unsigned int cpu)
+{
+	if (shmobile_smp_scu_cpu_kill(cpu))
+		return r8a7779_platform_cpu_kill(cpu);
+
+	return 0;
+}
+#endif /* CONFIG_HOTPLUG_CPU */
+
+const struct smp_operations r8a7779_smp_ops  __initconst = {
+	.smp_prepare_cpus	= r8a7779_smp_prepare_cpus,
+	.smp_boot_secondary	= r8a7779_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_die		= shmobile_smp_scu_cpu_die,
+	.cpu_kill		= r8a7779_cpu_kill,
+#endif
+};