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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
16#include <asm/cputype.h>
17#include <asm/io.h>
18#include <asm/ptrace.h>
19#include <asm/smp_plat.h>
20#include <asm/tlbflush.h>
21
22/* Macros for consistency checks of the GICC subtable of MADT */
23
24/*
25 * MADT GICC minimum length refers to the MADT GICC structure table length as
26 * defined in the earliest ACPI version supported on arm64, ie ACPI 5.1.
27 *
28 * The efficiency_class member was added to the
29 * struct acpi_madt_generic_interrupt to represent the MADT GICC structure
30 * "Processor Power Efficiency Class" field, added in ACPI 6.0 whose offset
31 * is therefore used to delimit the MADT GICC structure minimum length
32 * appropriately.
33 */
34#define ACPI_MADT_GICC_MIN_LENGTH ACPI_OFFSET( \
35 struct acpi_madt_generic_interrupt, efficiency_class)
36
37#define BAD_MADT_GICC_ENTRY(entry, end) \
38 (!(entry) || (entry)->header.length < ACPI_MADT_GICC_MIN_LENGTH || \
39 (unsigned long)(entry) + (entry)->header.length > (end))
40
41#define ACPI_MADT_GICC_SPE (ACPI_OFFSET(struct acpi_madt_generic_interrupt, \
42 spe_interrupt) + sizeof(u16))
43
44/* Basic configuration for ACPI */
45#ifdef CONFIG_ACPI
46pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
47
48/* ACPI table mapping after acpi_permanent_mmap is set */
49static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
50 acpi_size size)
51{
52 /* For normal memory we already have a cacheable mapping. */
53 if (memblock_is_map_memory(phys))
54 return (void __iomem *)__phys_to_virt(phys);
55
56 /*
57 * We should still honor the memory's attribute here because
58 * crash dump kernel possibly excludes some ACPI (reclaim)
59 * regions from memblock list.
60 */
61 return __ioremap(phys, size, __acpi_get_mem_attribute(phys));
62}
63#define acpi_os_ioremap acpi_os_ioremap
64
65typedef u64 phys_cpuid_t;
66#define PHYS_CPUID_INVALID INVALID_HWID
67
68#define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */
69extern int acpi_disabled;
70extern int acpi_noirq;
71extern int acpi_pci_disabled;
72
73static inline void disable_acpi(void)
74{
75 acpi_disabled = 1;
76 acpi_pci_disabled = 1;
77 acpi_noirq = 1;
78}
79
80static inline void enable_acpi(void)
81{
82 acpi_disabled = 0;
83 acpi_pci_disabled = 0;
84 acpi_noirq = 0;
85}
86
87/*
88 * The ACPI processor driver for ACPI core code needs this macro
89 * to find out this cpu was already mapped (mapping from CPU hardware
90 * ID to CPU logical ID) or not.
91 */
92#define cpu_physical_id(cpu) cpu_logical_map(cpu)
93
94/*
95 * It's used from ACPI core in kdump to boot UP system with SMP kernel,
96 * with this check the ACPI core will not override the CPU index
97 * obtained from GICC with 0 and not print some error message as well.
98 * Since MADT must provide at least one GICC structure for GIC
99 * initialization, CPU will be always available in MADT on ARM64.
100 */
101static inline bool acpi_has_cpu_in_madt(void)
102{
103 return true;
104}
105
106struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
107static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
108{
109 return acpi_cpu_get_madt_gicc(cpu)->uid;
110}
111
112static inline void arch_fix_phys_package_id(int num, u32 slot) { }
113void __init acpi_init_cpus(void);
114int apei_claim_sea(struct pt_regs *regs);
115#else
116static inline void acpi_init_cpus(void) { }
117static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; }
118#endif /* CONFIG_ACPI */
119
120#ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
121bool acpi_parking_protocol_valid(int cpu);
122void __init
123acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
124#else
125static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
126static inline void
127acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
128{}
129#endif
130
131static inline const char *acpi_get_enable_method(int cpu)
132{
133 if (acpi_psci_present())
134 return "psci";
135
136 if (acpi_parking_protocol_valid(cpu))
137 return "parking-protocol";
138
139 return NULL;
140}
141
142#ifdef CONFIG_ACPI_APEI
143/*
144 * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
145 * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
146 * with a kernel command line parameter "acpi=nocmcoff". But we don't
147 * have this IA-32 specific feature on ARM64, this definition is only
148 * for compatibility.
149 */
150#define acpi_disable_cmcff 1
151static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
152{
153 return __acpi_get_mem_attribute(addr);
154}
155#endif /* CONFIG_ACPI_APEI */
156
157#ifdef CONFIG_ACPI_NUMA
158int arm64_acpi_numa_init(void);
159int acpi_numa_get_nid(unsigned int cpu);
160void acpi_map_cpus_to_nodes(void);
161#else
162static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
163static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; }
164static inline void acpi_map_cpus_to_nodes(void) { }
165#endif /* CONFIG_ACPI_NUMA */
166
167#define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
168
169#endif /*_ASM_ACPI_H*/