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
47pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
48
49/* ACPI table mapping after acpi_permanent_mmap is set */
50void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
51#define acpi_os_ioremap acpi_os_ioremap
52
53typedef u64 phys_cpuid_t;
54#define PHYS_CPUID_INVALID INVALID_HWID
55
56#define acpi_strict 1	/* No out-of-spec workarounds on ARM64 */
57extern int acpi_disabled;
58extern int acpi_noirq;
59extern int acpi_pci_disabled;
60
61static inline void disable_acpi(void)
62{
63	acpi_disabled = 1;
64	acpi_pci_disabled = 1;
65	acpi_noirq = 1;
66}
67
68static 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 */
89static inline bool acpi_has_cpu_in_madt(void)
90{
91	return true;
92}
93
94struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
95static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
96{
97	return	acpi_cpu_get_madt_gicc(cpu)->uid;
98}
99
100static inline void arch_fix_phys_package_id(int num, u32 slot) { }
101void __init acpi_init_cpus(void);
102int apei_claim_sea(struct pt_regs *regs);
103#else
104static inline void acpi_init_cpus(void) { }
105static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; }
106#endif /* CONFIG_ACPI */
107
108#ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
109bool acpi_parking_protocol_valid(int cpu);
110void __init
111acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
112#else
113static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
114static inline void
115acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
116{}
117#endif
118
119static 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
139static 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
146int arm64_acpi_numa_init(void);
147int acpi_numa_get_nid(unsigned int cpu);
148void acpi_map_cpus_to_nodes(void);
149#else
150static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
151static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; }
152static 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