LXR linux/arch/arm/include/asm/smp

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ASMARM_ARCH_SCU_H
   3#define __ASMARM_ARCH_SCU_H
   4
   5#define SCU_PM_NORMAL   0
   6#define SCU_PM_DORMANT  2
   7#define SCU_PM_POWEROFF 3
   8
   9#ifndef __ASSEMBLER__
  10
  11#include <linux/errno.h>
  12#include <asm/cputype.h>
  13
  14static inline bool scu_a9_has_base(void)
  15{
  16        return read_cpuid_part() == ARM_CPU_PART_CORTEX_A9;
  17}
  18
  19static inline unsigned long scu_a9_get_base(void)
  20{
  21        unsigned long pa;
  22
  23        asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (pa));
  24
  25        return pa;
  26}
  27
  28#ifdef CONFIG_HAVE_ARM_SCU
  29unsigned int scu_get_core_count(void __iomem *);
  30int scu_power_mode(void __iomem *, unsigned int);
  31int scu_cpu_power_enable(void __iomem *, unsigned int);
  32int scu_get_cpu_power_mode(void __iomem *scu_base, unsigned int logical_cpu);
  33#else
  34static inline unsigned int scu_get_core_count(void __iomem *scu_base)
  35{
  36        return 0;
  37}
  38static inline int scu_power_mode(void __iomem *scu_base, unsigned int mode)
  39{
  40        return -EINVAL;
  41}
  42static inline int scu_cpu_power_enable(void __iomem *scu_base,
  43                                       unsigned int mode)
  44{
  45        return -EINVAL;
  46}
  47static inline int scu_get_cpu_power_mode(void __iomem *scu_base,
  48                                         unsigned int logical_cpu)
  49{
  50        return -EINVAL;
  51}
  52#endif
  53
  54#if defined(CONFIG_SMP) && defined(CONFIG_HAVE_ARM_SCU)
  55void scu_enable(void __iomem *scu_base);
  56#else
  57static inline void scu_enable(void __iomem *scu_base) {}
  58#endif
  59
  60#endif
  61
  62#endif
  63