diff options
Diffstat (limited to 'arch/arm/mach-uniphier/arm64/smp_kick_cpus.c')
-rw-r--r-- | arch/arm/mach-uniphier/arm64/smp_kick_cpus.c | 31 |
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 */ +} |