summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-uniphier/arm64/smp_kick_cpus.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-uniphier/arm64/smp_kick_cpus.c')
-rw-r--r--arch/arm/mach-uniphier/arm64/smp_kick_cpus.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/arm64/smp_kick_cpus.c b/arch/arm/mach-uniphier/arm64/smp_kick_cpus.c
new file mode 100644
index 0000000000..64412e0ecc
--- /dev/null
+++ b/arch/arm/mach-uniphier/arm64/smp_kick_cpus.c
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <mapmem.h>
+#include <linux/io.h>
+#include <linux/sizes.h>
+
+#define UNIPHIER_SMPCTRL_ROM_RSV0 0x59801200
+
+void uniphier_smp_setup(void);
+void uniphier_secondary_startup(void);
+
+void uniphier_smp_kick_all_cpus(void)
+{
+ void __iomem *rom_boot_rsv0;
+
+ rom_boot_rsv0 = map_sysmem(UNIPHIER_SMPCTRL_ROM_RSV0, SZ_8);
+
+ writeq((u64)uniphier_secondary_startup, rom_boot_rsv0);
+ readq(rom_boot_rsv0); /* relax */
+
+ unmap_sysmem(rom_boot_rsv0);
+
+ uniphier_smp_setup();
+
+ asm("sev"); /* Bring up all secondary CPUs from Boot ROM into U-Boot */
+}
OpenPOWER on IntegriCloud