1 /* SPDX-License-Identifier: GPL-2.0-only */
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>
12 #include <linux/efi.h>
13 #include <linux/memblock.h>
14 #include <linux/psci.h>
15 #include <linux/stddef.h>
17 #include <asm/cputype.h>
19 #include <asm/ptrace.h>
20 #include <asm/smp_plat.h>
21 #include <asm/tlbflush.h>
23 /* Macros for consistency checks of the GICC subtable of MADT */
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.
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
35 #define ACPI_MADT_GICC_MIN_LENGTH offsetof( \
36 struct acpi_madt_generic_interrupt, efficiency_class)
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))
42 #define ACPI_MADT_GICC_SPE (offsetof(struct acpi_madt_generic_interrupt, \
43 spe_interrupt) + sizeof(u16))
45 /* Basic configuration for ACPI */
47 pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
49 /* ACPI table mapping after acpi_permanent_mmap is set */
50 static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
53 /* For normal memory we already have a cacheable mapping. */
54 if (memblock_is_map_memory(phys))
55 return (void __iomem *)__phys_to_virt(phys);
58 * We should still honor the memory's attribute here because
59 * crash dump kernel possibly excludes some ACPI (reclaim)
60 * regions from memblock list.
62 return __ioremap(phys, size, __acpi_get_mem_attribute(phys));
64 #define acpi_os_ioremap acpi_os_ioremap
66 typedef u64 phys_cpuid_t;
67 #define PHYS_CPUID_INVALID INVALID_HWID
69 #define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */
70 extern int acpi_disabled;
71 extern int acpi_noirq;
72 extern int acpi_pci_disabled;
74 static inline void disable_acpi(void)
77 acpi_pci_disabled = 1;
81 static inline void enable_acpi(void)
84 acpi_pci_disabled = 0;
89 * The ACPI processor driver for ACPI core code needs this macro
90 * to find out this cpu was already mapped (mapping from CPU hardware
91 * ID to CPU logical ID) or not.
93 #define cpu_physical_id(cpu) cpu_logical_map(cpu)
96 * It's used from ACPI core in kdump to boot UP system with SMP kernel,
97 * with this check the ACPI core will not override the CPU index
98 * obtained from GICC with 0 and not print some error message as well.
99 * Since MADT must provide at least one GICC structure for GIC
100 * initialization, CPU will be always available in MADT on ARM64.
102 static inline bool acpi_has_cpu_in_madt(void)
107 struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
108 static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
110 return acpi_cpu_get_madt_gicc(cpu)->uid;
113 static inline void arch_fix_phys_package_id(int num, u32 slot) { }
114 void __init acpi_init_cpus(void);
115 int apei_claim_sea(struct pt_regs *regs);
117 static inline void acpi_init_cpus(void) { }
118 static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; }
119 #endif /* CONFIG_ACPI */
121 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
122 bool acpi_parking_protocol_valid(int cpu);
124 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
126 static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
128 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
132 static inline const char *acpi_get_enable_method(int cpu)
134 if (acpi_psci_present())
137 if (acpi_parking_protocol_valid(cpu))
138 return "parking-protocol";
143 #ifdef CONFIG_ACPI_APEI
145 * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
146 * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
147 * with a kernel command line parameter "acpi=nocmcoff". But we don't
148 * have this IA-32 specific feature on ARM64, this definition is only
151 #define acpi_disable_cmcff 1
152 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
154 return __acpi_get_mem_attribute(addr);
156 #endif /* CONFIG_ACPI_APEI */
158 #ifdef CONFIG_ACPI_NUMA
159 int arm64_acpi_numa_init(void);
160 int acpi_numa_get_nid(unsigned int cpu);
161 void acpi_map_cpus_to_nodes(void);
163 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
164 static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; }
165 static inline void acpi_map_cpus_to_nodes(void) { }
166 #endif /* CONFIG_ACPI_NUMA */
168 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
170 #endif /*_ASM_ACPI_H*/