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 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
34 static inline unsigned int scu_get_core_count(void __iomem *scu_base)
35 {
36 return 0;
37 }
38 static inline int scu_power_mode(void __iomem *scu_base, unsigned int mode)
39 {
40 return -EINVAL;
41 }
42 static inline int scu_cpu_power_enable(void __iomem *scu_base,
43 unsigned int mode)
44 {
45 return -EINVAL;
46 }
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
57 static inline void scu_enable(void __iomem *scu_base) {}
58 #endif
59
60 #endif
61
62 #endif
63
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