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 
scu_a9_has_base(void)14 static inline bool scu_a9_has_base(void)
15 {
16 	return read_cpuid_part() == ARM_CPU_PART_CORTEX_A9;
17 }
18 
scu_a9_get_base(void)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 int scu_cpu_power_enable(void __iomem *, unsigned int);
32 int scu_get_cpu_power_mode(void __iomem *scu_base, unsigned int logical_cpu);
33 #else
scu_get_core_count(void __iomem * scu_base)34 static inline unsigned int scu_get_core_count(void __iomem *scu_base)
35 {
36 	return 0;
37 }
scu_power_mode(void __iomem * scu_base,unsigned int mode)38 static inline int scu_power_mode(void __iomem *scu_base, unsigned int mode)
39 {
40 	return -EINVAL;
41 }
scu_cpu_power_enable(void __iomem * scu_base,unsigned int mode)42 static inline int scu_cpu_power_enable(void __iomem *scu_base,
43 				       unsigned int mode)
44 {
45 	return -EINVAL;
46 }
scu_get_cpu_power_mode(void __iomem * scu_base,unsigned int logical_cpu)47 static 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)
55 void scu_enable(void __iomem *scu_base);
56 #else
scu_enable(void __iomem * scu_base)57 static inline void scu_enable(void __iomem *scu_base) {}
58 #endif
59 
60 #endif
61 
62 #endif
63