From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/arm/mach-shmobile/smp-sh73a0.c | 68 +++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 arch/arm/mach-shmobile/smp-sh73a0.c (limited to 'arch/arm/mach-shmobile/smp-sh73a0.c') diff --git a/arch/arm/mach-shmobile/smp-sh73a0.c b/arch/arm/mach-shmobile/smp-sh73a0.c new file mode 100644 index 0000000000..453d488650 --- /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 +#include +#include +#include +#include + +#include + +#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 +}; -- cgit v1.2.3