tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2013-2014, Linaro Ltd.
3 * Author: Al Stone <al.stone@linaro.org>
4 * Author: Graeme Gregory <graeme.gregory@linaro.org>
5 * Author: Hanjun Guo <hanjun.guo@linaro.org>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation;
10 */
11
12#ifndef _ASM_ACPI_H
13#define _ASM_ACPI_H
14
15#include <linux/memblock.h>
16#include <linux/psci.h>
17
18#include <asm/cputype.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#define ACPI_MADT_GICC_LENGTH \
24 (acpi_gbl_FADT.header.revision < 6 ? 76 : 80)
25
26#define BAD_MADT_GICC_ENTRY(entry, end) \
27 (!(entry) || (unsigned long)(entry) + sizeof(*(entry)) > (end) || \
28 (entry)->header.length != ACPI_MADT_GICC_LENGTH)
29
30/* Basic configuration for ACPI */
31#ifdef CONFIG_ACPI
32/* ACPI table mapping after acpi_permanent_mmap is set */
33static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
34 acpi_size size)
35{
36 /*
37 * EFI's reserve_regions() call adds memory with the WB attribute
38 * to memblock via early_init_dt_add_memory_arch().
39 */
40 if (!memblock_is_memory(phys))
41 return ioremap(phys, size);
42
43 return ioremap_cache(phys, size);
44}
45#define acpi_os_ioremap acpi_os_ioremap
46
47typedef u64 phys_cpuid_t;
48#define PHYS_CPUID_INVALID INVALID_HWID
49
50#define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */
51extern int acpi_disabled;
52extern int acpi_noirq;
53extern int acpi_pci_disabled;
54
55static inline void disable_acpi(void)
56{
57 acpi_disabled = 1;
58 acpi_pci_disabled = 1;
59 acpi_noirq = 1;
60}
61
62static inline void enable_acpi(void)
63{
64 acpi_disabled = 0;
65 acpi_pci_disabled = 0;
66 acpi_noirq = 0;
67}
68
69/*
70 * The ACPI processor driver for ACPI core code needs this macro
71 * to find out this cpu was already mapped (mapping from CPU hardware
72 * ID to CPU logical ID) or not.
73 */
74#define cpu_physical_id(cpu) cpu_logical_map(cpu)
75
76/*
77 * It's used from ACPI core in kdump to boot UP system with SMP kernel,
78 * with this check the ACPI core will not override the CPU index
79 * obtained from GICC with 0 and not print some error message as well.
80 * Since MADT must provide at least one GICC structure for GIC
81 * initialization, CPU will be always available in MADT on ARM64.
82 */
83static inline bool acpi_has_cpu_in_madt(void)
84{
85 return true;
86}
87
88static inline void arch_fix_phys_package_id(int num, u32 slot) { }
89void __init acpi_init_cpus(void);
90
91#else
92static inline void acpi_init_cpus(void) { }
93#endif /* CONFIG_ACPI */
94
95#ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
96bool acpi_parking_protocol_valid(int cpu);
97void __init
98acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
99#else
100static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
101static inline void
102acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
103{}
104#endif
105
106static inline const char *acpi_get_enable_method(int cpu)
107{
108 if (acpi_psci_present())
109 return "psci";
110
111 if (acpi_parking_protocol_valid(cpu))
112 return "parking-protocol";
113
114 return NULL;
115}
116
117#ifdef CONFIG_ACPI_APEI
118/*
119 * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
120 * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
121 * with a kernel command line parameter "acpi=nocmcoff". But we don't
122 * have this IA-32 specific feature on ARM64, this definition is only
123 * for compatibility.
124 */
125#define acpi_disable_cmcff 1
126pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
127
128/*
129 * Despite its name, this function must still broadcast the TLB
130 * invalidation in order to ensure other CPUs don't end up with junk
131 * entries as a result of speculation. Unusually, its also called in
132 * IRQ context (ghes_iounmap_irq) so if we ever need to use IPIs for
133 * TLB broadcasting, then we're in trouble here.
134 */
135static inline void arch_apei_flush_tlb_one(unsigned long addr)
136{
137 flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
138}
139#endif /* CONFIG_ACPI_APEI */
140
141#ifdef CONFIG_ACPI_NUMA
142int arm64_acpi_numa_init(void);
143int acpi_numa_get_nid(unsigned int cpu, u64 hwid);
144#else
145static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
146static inline int acpi_numa_get_nid(unsigned int cpu, u64 hwid) { return NUMA_NO_NODE; }
147#endif /* CONFIG_ACPI_NUMA */
148
149#define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
150
151#endif /*_ASM_ACPI_H*/