Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 48 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/smp-emev2.c b/arch/arm/mach-shmobile/smp-emev2.c
new file mode 100644
index 000000000..3853ecea4
--- /dev/null
+++ b/arch/arm/mach-shmobile/smp-emev2.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SMP support for Emma Mobile EV2
+ *
+ * Copyright (C) 2012  Renesas Solutions Corp.
+ * Copyright (C) 2012  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 <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
+#include "common.h"
+#include "emev2.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_smp_scu_prepare_cpus(EMEV2_SCU_BASE, max_cpus);
+}
+
+const struct smp_operations emev2_smp_ops __initconst = {
+	.smp_prepare_cpus	= emev2_smp_prepare_cpus,
+	.smp_boot_secondary	= emev2_boot_secondary,
+};