arch/arm/include/asm/smp_scu.h

   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
  14 static inline bool scu_a9_has_base(void)
  15 {
  16         return read_cpuid_part() == ARM_CPU_PART_CORTEX_A9;
  17 }
  18
  19 static 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
  29 unsigned int scu_get_core_count(void __iomem *);
  30 int scu_power_mode(void __iomem *, unsigned int);
  31 #else
  32 static inline unsigned int scu_get_core_count(void __iomem *scu_base)
  33 {
  34         return 0;
  35 }
  36 static inline int scu_power_mode(void __iomem *scu_base, unsigned int mode)
  37 {
  38         return -EINVAL;
  39 }
  40 #endif
  41
  42 #if defined(CONFIG_SMP) && defined(CONFIG_HAVE_ARM_SCU)
  43 void scu_enable(void __iomem *scu_base);
  44 #else
  45 static inline void scu_enable(void __iomem *scu_base) {}
  46 #endif
  47
  48 #endif
  49
  50 #endif