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>
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;
15 #include <linux/efi.h>
16 #include <linux/memblock.h>
17 #include <linux/psci.h>
19 #include <asm/cputype.h>
21 #include <asm/smp_plat.h>
22 #include <asm/tlbflush.h>
24 /* Macros for consistency checks of the GICC subtable of MADT */
25 #define ACPI_MADT_GICC_LENGTH \
26 (acpi_gbl_FADT.header.revision < 6 ? 76 : 80)
28 #define BAD_MADT_GICC_ENTRY(entry, end) \
29 (!(entry) || (entry)->header.length != ACPI_MADT_GICC_LENGTH || \
30 (unsigned long)(entry) + ACPI_MADT_GICC_LENGTH > (end))
32 /* Basic configuration for ACPI */
34 pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
36 /* ACPI table mapping after acpi_permanent_mmap is set */
37 static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
40 /* For normal memory we already have a cacheable mapping. */
41 if (memblock_is_map_memory(phys))
42 return (void __iomem *)__phys_to_virt(phys);
45 * We should still honor the memory's attribute here because
46 * crash dump kernel possibly excludes some ACPI (reclaim)
47 * regions from memblock list.
49 return __ioremap(phys, size, __acpi_get_mem_attribute(phys));
51 #define acpi_os_ioremap acpi_os_ioremap
53 typedef u64 phys_cpuid_t;
54 #define PHYS_CPUID_INVALID INVALID_HWID
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;
61 static inline void disable_acpi(void)
64 acpi_pci_disabled = 1;
68 static inline void enable_acpi(void)
71 acpi_pci_disabled = 0;
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.
80 #define cpu_physical_id(cpu) cpu_logical_map(cpu)
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.
89 static inline bool acpi_has_cpu_in_madt(void)
94 struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
95 static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
97 return acpi_cpu_get_madt_gicc(cpu)->uid;
100 static inline void arch_fix_phys_package_id(int num, u32 slot) { }
101 void __init acpi_init_cpus(void);
104 static inline void acpi_init_cpus(void) { }
105 #endif /* CONFIG_ACPI */
107 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
108 bool acpi_parking_protocol_valid(int cpu);
110 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
112 static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
114 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
118 static inline const char *acpi_get_enable_method(int cpu)
120 if (acpi_psci_present())
123 if (acpi_parking_protocol_valid(cpu))
124 return "parking-protocol";
129 #ifdef CONFIG_ACPI_APEI
131 * acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
132 * IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
133 * with a kernel command line parameter "acpi=nocmcoff". But we don't
134 * have this IA-32 specific feature on ARM64, this definition is only
137 #define acpi_disable_cmcff 1
138 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
140 return __acpi_get_mem_attribute(addr);
142 #endif /* CONFIG_ACPI_APEI */
144 #ifdef CONFIG_ACPI_NUMA
145 int arm64_acpi_numa_init(void);
146 int acpi_numa_get_nid(unsigned int cpu);
147 void acpi_map_cpus_to_nodes(void);
149 static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
150 static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; }
151 static inline void acpi_map_cpus_to_nodes(void) { }
152 #endif /* CONFIG_ACPI_NUMA */
154 #define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
156 #endif /*_ASM_ACPI_H*/