1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2013-2014, Linaro Ltd.
4 * Author: Al Stone <al.stone@linaro.org>
5 * Author: Graeme Gregory <graeme.gregory@linaro.org>
6 * Author: Hanjun Guo <hanjun.guo@linaro.org>
7 *
8 * Copyright (C) 2021-2023, Ventana Micro Systems Inc.
9 * Author: Sunil V L <sunilvl@ventanamicro.com>
10 */
11
12 #ifndef _ASM_ACPI_H
13 #define _ASM_ACPI_H
14
15 #include <linux/cpuidle.h>
16
17 /* Basic configuration for ACPI */
18 #ifdef CONFIG_ACPI
19
20 typedef u64 phys_cpuid_t;
21 #define PHYS_CPUID_INVALID INVALID_HARTID
22
23 /* ACPI table mapping after acpi_permanent_mmap is set */
24 void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
25 #define acpi_os_ioremap acpi_os_ioremap
26
27 #define acpi_strict 1 /* No out-of-spec workarounds on RISC-V */
28 extern int acpi_disabled;
29 extern int acpi_noirq;
30 extern int acpi_pci_disabled;
31
disable_acpi(void)32 static inline void disable_acpi(void)
33 {
34 acpi_disabled = 1;
35 acpi_pci_disabled = 1;
36 acpi_noirq = 1;
37 }
38
enable_acpi(void)39 static inline void enable_acpi(void)
40 {
41 acpi_disabled = 0;
42 acpi_pci_disabled = 0;
43 acpi_noirq = 0;
44 }
45
46 /*
47 * The ACPI processor driver for ACPI core code needs this macro
48 * to find out whether this cpu was already mapped (mapping from CPU hardware
49 * ID to CPU logical ID) or not.
50 */
51 #define cpu_physical_id(cpu) cpuid_to_hartid_map(cpu)
52
53 /*
54 * Since MADT must provide at least one RINTC structure, the
55 * CPU will be always available in MADT on RISC-V.
56 */
acpi_has_cpu_in_madt(void)57 static inline bool acpi_has_cpu_in_madt(void)
58 {
59 return true;
60 }
61
arch_fix_phys_package_id(int num,u32 slot)62 static inline void arch_fix_phys_package_id(int num, u32 slot) { }
63
64 void acpi_init_rintc_map(void);
65 struct acpi_madt_rintc *acpi_cpu_get_madt_rintc(int cpu);
66
67 int acpi_get_riscv_isa(struct acpi_table_header *table,
68 unsigned int cpu, const char **isa);
69
70 void acpi_get_cbo_block_size(struct acpi_table_header *table, u32 *cbom_size,
71 u32 *cboz_size, u32 *cbop_size);
72 acpi_handle acpi_get_riscv_gsi_handle(u32 gsi);
73
74 /*
75 * RISC-V Functional Fixed Hardware Specification Version v1.0.1,
76 * Chapter 3.1.2, Table 4: Arch. Context Lost Flags
77 */
78 #define RISCV_LPI_HART_TIMER_CTXT_LOST BIT(0)
79
arch_get_idle_state_flags(u32 arch_flags)80 static inline unsigned int arch_get_idle_state_flags(u32 arch_flags)
81 {
82 if (arch_flags & RISCV_LPI_HART_TIMER_CTXT_LOST)
83 return CPUIDLE_FLAG_TIMER_STOP;
84
85 return 0;
86 }
87
88 #define arch_get_idle_state_flags arch_get_idle_state_flags
89
90 #else
acpi_init_rintc_map(void)91 static inline void acpi_init_rintc_map(void) { }
acpi_cpu_get_madt_rintc(int cpu)92 static inline struct acpi_madt_rintc *acpi_cpu_get_madt_rintc(int cpu)
93 {
94 return NULL;
95 }
96
acpi_get_riscv_isa(struct acpi_table_header * table,unsigned int cpu,const char ** isa)97 static inline int acpi_get_riscv_isa(struct acpi_table_header *table,
98 unsigned int cpu, const char **isa)
99 {
100 return -EINVAL;
101 }
102
acpi_get_cbo_block_size(struct acpi_table_header * table,u32 * cbom_size,u32 * cboz_size,u32 * cbop_size)103 static inline void acpi_get_cbo_block_size(struct acpi_table_header *table,
104 u32 *cbom_size, u32 *cboz_size,
105 u32 *cbop_size) { }
106
107 #endif /* CONFIG_ACPI */
108
109 #ifdef CONFIG_ACPI_NUMA
110 void acpi_map_cpus_to_nodes(void);
111 #else
acpi_map_cpus_to_nodes(void)112 static inline void acpi_map_cpus_to_nodes(void) { }
113 #endif /* CONFIG_ACPI_NUMA */
114
115 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
116
117 #endif /*_ASM_ACPI_H*/
118