Adding upstream version 5.10.209.upstream/5.10.209upstream

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

1 files changed, 57 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..0403aa862
--- /dev/null
+++ b/arch/arm/mach-shmobile/smp-sh73a0.c
@@ -0,0 +1,57 @@
+// 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 WUPCR		IOMEM(0xe6151010)
+#define SRESCR		IOMEM(0xe6151018)
+#define PSTR		IOMEM(0xe6151040)
+#define SBAR		IOMEM(0xe6180020)
+#define APARMBAREA	IOMEM(0xe6f10020)
+
+#define SH73A0_SCU_BASE 0xf0000000
+
+static int sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	unsigned int lcpu = cpu_logical_map(cpu);
+
+	if (((__raw_readl(PSTR) >> (4 * lcpu)) & 3) == 3)
+		__raw_writel(1 << lcpu, WUPCR);	/* wake up */
+	else
+		__raw_writel(1 << lcpu, SRESCR);	/* reset */
+
+	return 0;
+}
+
+static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
+{
+	/* Map the reset vector (in headsmp.S) */
+	__raw_writel(0, APARMBAREA);      /* 4k */
+	__raw_writel(__pa(shmobile_boot_vector), SBAR);
+
+	/* 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
+};