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Diffstat (limited to 'arch/arm/include/asm/smp_scu.h')
-rw-r--r--arch/arm/include/asm/smp_scu.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/include/asm/smp_scu.h b/arch/arm/include/asm/smp_scu.h
new file mode 100644
index 000000000..b818e5d0c
--- /dev/null
+++ b/arch/arm/include/asm/smp_scu.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASMARM_ARCH_SCU_H
+#define __ASMARM_ARCH_SCU_H
+
+#define SCU_PM_NORMAL 0
+#define SCU_PM_DORMANT 2
+#define SCU_PM_POWEROFF 3
+
+#ifndef __ASSEMBLER__
+
+#include <linux/errno.h>
+#include <asm/cputype.h>
+
+static inline bool scu_a9_has_base(void)
+{
+ return read_cpuid_part() == ARM_CPU_PART_CORTEX_A9;
+}
+
+static inline unsigned long scu_a9_get_base(void)
+{
+ unsigned long pa;
+
+ asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (pa));
+
+ return pa;
+}
+
+#ifdef CONFIG_HAVE_ARM_SCU
+unsigned int scu_get_core_count(void __iomem *);
+int scu_power_mode(void __iomem *, unsigned int);
+int scu_cpu_power_enable(void __iomem *, unsigned int);
+int scu_get_cpu_power_mode(void __iomem *scu_base, unsigned int logical_cpu);
+#else
+static inline unsigned int scu_get_core_count(void __iomem *scu_base)
+{
+ return 0;
+}
+static inline int scu_power_mode(void __iomem *scu_base, unsigned int mode)
+{
+ return -EINVAL;
+}
+static inline int scu_cpu_power_enable(void __iomem *scu_base,
+ unsigned int mode)
+{
+ return -EINVAL;
+}
+static inline int scu_get_cpu_power_mode(void __iomem *scu_base,
+ unsigned int logical_cpu)
+{
+ return -EINVAL;
+}
+#endif
+
+#if defined(CONFIG_SMP) && defined(CONFIG_HAVE_ARM_SCU)
+void scu_enable(void __iomem *scu_base);
+#else
+static inline void scu_enable(void __iomem *scu_base) {}
+#endif
+
+#endif
+
+#endif