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 
9 #ifndef _ASM_ACPI_H
10 #define _ASM_ACPI_H
11 
12 #include <linux/efi.h>
13 #include <linux/memblock.h>
14 #include <linux/psci.h>
15 #include <linux/stddef.h>
16 
17 #include <asm/cputype.h>
18 #include <asm/io.h>
19 #include <asm/ptrace.h>
20 #include <asm/smp_plat.h>
21 #include <asm/tlbflush.h>
22 
23 /* Macros for consistency checks of the GICC subtable of MADT */
24 
25 /*
26  * MADT GICC minimum length refers to the MADT GICC structure table length as
27  * defined in the earliest ACPI version supported on arm64, ie ACPI 5.1.
28  *
29  * The efficiency_class member was added to the
30  * struct acpi_madt_generic_interrupt to represent the MADT GICC structure
31  * "Processor Power Efficiency Class" field, added in ACPI 6.0 whose offset
32  * is therefore used to delimit the MADT GICC structure minimum length
33  * appropriately.
34  */
35 #define ACPI_MADT_GICC_MIN_LENGTH   offsetof(  \
36 	struct acpi_madt_generic_interrupt, efficiency_class)
37 
38 #define BAD_MADT_GICC_ENTRY(entry, end)					\
39 	(!(entry) || (entry)->header.length < ACPI_MADT_GICC_MIN_LENGTH || \
40 	(unsigned long)(entry) + (entry)->header.length > (end))
41 
42 #define ACPI_MADT_GICC_SPE  (offsetof(struct acpi_madt_generic_interrupt, \
43 	spe_interrupt) + sizeof(u16))
44 
45 /* Basic configuration for ACPI */
46 #ifdef	CONFIG_ACPI
47 pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
48 
49 /* ACPI table mapping after acpi_permanent_mmap is set */
50 void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
51 #define acpi_os_ioremap acpi_os_ioremap
52 
53 typedef u64 phys_cpuid_t;
54 #define PHYS_CPUID_INVALID INVALID_HWID
55 
56 #define acpi_strict 1	/* No out-of-spec workarounds on ARM64 */
57 extern int acpi_disabled;
58 extern int acpi_noirq;
59 extern int acpi_pci_disabled;
60 
disable_acpi(void)61 static inline void disable_acpi(void)
62 {
63 	acpi_disabled = 1;
64 	acpi_pci_disabled = 1;
65 	acpi_noirq = 1;
66 }
67 
enable_acpi(void)68 static inline void enable_acpi(void)
69 {
70 	acpi_disabled = 0;
71 	acpi_pci_disabled = 0;
72 	acpi_noirq = 0;
73 }
74 
75 /*
76  * The ACPI processor driver for ACPI core code needs this macro
77  * to find out this cpu was already mapped (mapping from CPU hardware
78  * ID to CPU logical ID) or not.
79  */
80 #define cpu_physical_id(cpu) cpu_logical_map(cpu)
81 
82 /*
83  * It's used from ACPI core in kdump to boot UP system with SMP kernel,
84  * with this check the ACPI core will not override the CPU index
85  * obtained from GICC with 0 and not print some error message as well.
86  * Since MADT must provide at least one GICC structure for GIC
87  * initialization, CPU will be always available in MADT on ARM64.
88  */
acpi_has_cpu_in_madt(void)89 static inline bool acpi_has_cpu_in_madt(void)
90 {
91 	return true;
92 }
93 
94 struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
get_acpi_id_for_cpu(unsigned int cpu)95 static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
96 {
97 	return	acpi_cpu_get_madt_gicc(cpu)->uid;
98 }
99 
arch_fix_phys_package_id(int num,u32 slot)100 static inline void arch_fix_phys_package_id(int num, u32 slot) { }
101 void __init acpi_init_cpus(void);
102 int apei_claim_sea(struct pt_regs *regs);
103 #else
acpi_init_cpus(void)104 static inline void acpi_init_cpus(void) { }
apei_claim_sea(struct pt_regs * regs)105 static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; }
106 #endif /* CONFIG_ACPI */
107 
108 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
109 bool acpi_parking_protocol_valid(int cpu);
110 void __init
111 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
112 #else
acpi_parking_protocol_valid(int cpu)113 static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
114 static inline void
acpi_set_mailbox_entry(int cpu,struct acpi_madt_generic_interrupt * processor)115 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
116 {}
117 #endif
118 
acpi_get_enable_method(int cpu)119 static inline const char *acpi_get_enable_method(int cpu)
120 {
121 	if (acpi_psci_present())
122 		return "psci";
123 
124 	if (acpi_parking_protocol_valid(cpu))
125 		return "parking-protocol";
126 
127 	return NULL;
128 }
129 
130 #ifdef	CONFIG_ACPI_APEI
131 /*
132  * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
133  * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
134  * with a kernel command line parameter "acpi=nocmcoff". But we don't
135  * have this IA-32 specific feature on ARM64, this definition is only
136  * for compatibility.
137  */
138 #define acpi_disable_cmcff 1
arch_apei_get_mem_attribute(phys_addr_t addr)139 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
140 {
141 	return __acpi_get_mem_attribute(addr);
142 }
143 #endif /* CONFIG_ACPI_APEI */
144 
145 #ifdef CONFIG_ACPI_NUMA
146 int arm64_acpi_numa_init(void);
147 int acpi_numa_get_nid(unsigned int cpu);
148 void acpi_map_cpus_to_nodes(void);
149 #else
arm64_acpi_numa_init(void)150 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
acpi_numa_get_nid(unsigned int cpu)151 static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; }
acpi_map_cpus_to_nodes(void)152 static inline void acpi_map_cpus_to_nodes(void) { }
153 #endif /* CONFIG_ACPI_NUMA */
154 
155 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
156 
157 #endif /*_ASM_ACPI_H*/
158