diff options
Diffstat (limited to 'arch/arm/mach-shmobile/platsmp-apmu.c')
| -rw-r--r-- | arch/arm/mach-shmobile/platsmp-apmu.c | 41 |
1 files changed, 24 insertions, 17 deletions
diff --git a/arch/arm/mach-shmobile/platsmp-apmu.c b/arch/arm/mach-shmobile/platsmp-apmu.c index 0c6bb458b7a4..e19266844e16 100644 --- a/arch/arm/mach-shmobile/platsmp-apmu.c +++ b/arch/arm/mach-shmobile/platsmp-apmu.c @@ -31,9 +31,21 @@ static struct { int bit; } apmu_cpus[NR_CPUS]; -#define WUPCR_OFFS 0x10 -#define PSTR_OFFS 0x40 -#define CPUNCR_OFFS(n) (0x100 + (0x10 * (n))) +#define WUPCR_OFFS 0x10 /* Wake Up Control Register */ +#define PSTR_OFFS 0x40 /* Power Status Register */ +#define CPUNCR_OFFS(n) (0x100 + (0x10 * (n))) + /* CPUn Power Status Control Register */ +#define DBGRCR_OFFS 0x180 /* Debug Resource Reset Control Reg. */ + +/* Power Status Register */ +#define CPUNST(r, n) (((r) >> (n * 4)) & 3) /* CPUn Status Bit */ +#define CPUST_RUN 0 /* Run Mode */ +#define CPUST_STANDBY 3 /* CoreStandby Mode */ + +/* Debug Resource Reset Control Register */ +#define DBGCPUREN BIT(24) /* CPU Other Reset Request Enable */ +#define DBGCPUNREN(n) BIT((n) + 20) /* CPUn Reset Request Enable */ +#define DBGCPUPREN BIT(19) /* CPU Peripheral Reset Req. Enable */ static int __maybe_unused apmu_power_on(void __iomem *p, int bit) { @@ -59,7 +71,7 @@ static int __maybe_unused apmu_power_off_poll(void __iomem *p, int bit) int k; for (k = 0; k < 1000; k++) { - if (((readl_relaxed(p + PSTR_OFFS) >> (bit * 4)) & 0x03) == 3) + if (CPUNST(readl_relaxed(p + PSTR_OFFS), bit) == CPUST_STANDBY) return 1; mdelay(1); @@ -78,6 +90,8 @@ static int __maybe_unused apmu_wrap(int cpu, int (*fn)(void __iomem *p, int cpu) #ifdef CONFIG_SMP static void apmu_init_cpu(struct resource *res, int cpu, int bit) { + u32 x; + if ((cpu >= ARRAY_SIZE(apmu_cpus)) || apmu_cpus[cpu].iomem) return; @@ -85,6 +99,11 @@ static void apmu_init_cpu(struct resource *res, int cpu, int bit) apmu_cpus[cpu].bit = bit; pr_debug("apmu ioremap %d %d %pr\n", cpu, bit, res); + + /* Setup for debug mode */ + x = readl(apmu_cpus[cpu].iomem + DBGRCR_OFFS); + x |= DBGCPUREN | DBGCPUNREN(bit) | DBGCPUPREN; + writel(x, apmu_cpus[cpu].iomem + DBGRCR_OFFS); } static void apmu_parse_cfg(void (*fn)(struct resource *res, int cpu, int bit), @@ -197,21 +216,9 @@ static void __init shmobile_smp_apmu_prepare_cpus_dt(unsigned int max_cpus) rcar_gen2_pm_init(); } -static int shmobile_smp_apmu_boot_secondary_md21(unsigned int cpu, - struct task_struct *idle) -{ - /* Error out when hardware debug mode is enabled */ - if (rcar_gen2_read_mode_pins() & BIT(21)) { - pr_warn("Unable to boot CPU%u when MD21 is set\n", cpu); - return -ENOTSUPP; - } - - return shmobile_smp_apmu_boot_secondary(cpu, idle); -} - static struct smp_operations apmu_smp_ops __initdata = { .smp_prepare_cpus = shmobile_smp_apmu_prepare_cpus_dt, - .smp_boot_secondary = shmobile_smp_apmu_boot_secondary_md21, + .smp_boot_secondary = shmobile_smp_apmu_boot_secondary, #ifdef CONFIG_HOTPLUG_CPU .cpu_can_disable = shmobile_smp_cpu_can_disable, .cpu_die = shmobile_smp_apmu_cpu_die, |