Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 68 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/smp-sh73a0.c b/arch/arm/mach-shmobile/smp-sh73a0.c
new file mode 100644
index 000000000..453d48865
--- /dev/null
+++ b/arch/arm/mach-shmobile/smp-sh73a0.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SMP support for R-Mobile / SH-Mobile - sh73a0 portion
+ *
+ * Copyright (C) 2010  Magnus Damm
+ * Copyright (C) 2010  Takashi Yoshii
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+
+#include <asm/smp_plat.h>
+
+#include "common.h"
+#include "sh73a0.h"
+
+#define CPG_BASE2	0xe6151000
+#define WUPCR		0x10	/* System-CPU Wake Up Control Register */
+#define SRESCR		0x18	/* System-CPU Software Reset Control Register */
+#define PSTR		0x40	/* System-CPU Power Status Register */
+
+#define SYSC_BASE	0xe6180000
+#define SBAR		0x20	/* SYS Boot Address Register */
+
+#define AP_BASE		0xe6f10000
+#define APARMBAREA	0x20	/* Address Translation Area Register */
+
+#define SH73A0_SCU_BASE 0xf0000000
+
+static int sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	unsigned int lcpu = cpu_logical_map(cpu);
+	void __iomem *cpg2 = ioremap(CPG_BASE2, PAGE_SIZE);
+
+	if (((readl(cpg2 + PSTR) >> (4 * lcpu)) & 3) == 3)
+		writel(1 << lcpu, cpg2 + WUPCR);	/* wake up */
+	else
+		writel(1 << lcpu, cpg2 + SRESCR);	/* reset */
+	iounmap(cpg2);
+	return 0;
+}
+
+static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
+{
+	void __iomem *ap = ioremap(AP_BASE, PAGE_SIZE);
+	void __iomem *sysc = ioremap(SYSC_BASE, PAGE_SIZE);
+
+	/* Map the reset vector (in headsmp.S) */
+	writel(0, ap + APARMBAREA);      /* 4k */
+	writel(__pa(shmobile_boot_vector), sysc + SBAR);
+	iounmap(sysc);
+	iounmap(ap);
+
+	/* setup sh73a0 specific SCU bits */
+	shmobile_smp_scu_prepare_cpus(SH73A0_SCU_BASE, max_cpus);
+}
+
+const struct smp_operations sh73a0_smp_ops __initconst = {
+	.smp_prepare_cpus	= sh73a0_smp_prepare_cpus,
+	.smp_boot_secondary	= sh73a0_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_can_disable	= shmobile_smp_cpu_can_disable,
+	.cpu_die		= shmobile_smp_scu_cpu_die,
+	.cpu_kill		= shmobile_smp_scu_cpu_kill,
+#endif
+};