Merge branch 'for-4.15/hyperv' into for-linus
[sfrench/cifs-2.6.git] / arch / arm / include / asm / smp_scu.h
1 #ifndef __ASMARM_ARCH_SCU_H
2 #define __ASMARM_ARCH_SCU_H
3
4 #define SCU_PM_NORMAL   0
5 #define SCU_PM_DORMANT  2
6 #define SCU_PM_POWEROFF 3
7
8 #ifndef __ASSEMBLER__
9
10 #include <linux/errno.h>
11 #include <asm/cputype.h>
12
13 static inline bool scu_a9_has_base(void)
14 {
15         return read_cpuid_part() == ARM_CPU_PART_CORTEX_A9;
16 }
17
18 static inline unsigned long scu_a9_get_base(void)
19 {
20         unsigned long pa;
21
22         asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (pa));
23
24         return pa;
25 }
26
27 #ifdef CONFIG_HAVE_ARM_SCU
28 unsigned int scu_get_core_count(void __iomem *);
29 int scu_power_mode(void __iomem *, unsigned int);
30 #else
31 static inline unsigned int scu_get_core_count(void __iomem *scu_base)
32 {
33         return 0;
34 }
35 static inline int scu_power_mode(void __iomem *scu_base, unsigned int mode)
36 {
37         return -EINVAL;
38 }
39 #endif
40
41 #if defined(CONFIG_SMP) && defined(CONFIG_HAVE_ARM_SCU)
42 void scu_enable(void __iomem *scu_base);
43 #else
44 static inline void scu_enable(void __iomem *scu_base) {}
45 #endif
46
47 #endif
48
49 #endif