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/mm.h> 16 #include <linux/psci.h> 17 18 #include <asm/cputype.h> 19 #include <asm/smp_plat.h> 20 21 /* Macros for consistency checks of the GICC subtable of MADT */ 22 #define ACPI_MADT_GICC_LENGTH \ 23 (acpi_gbl_FADT.header.revision < 6 ? 76 : 80) 24 25 #define BAD_MADT_GICC_ENTRY(entry, end) \ 26 (!(entry) || (unsigned long)(entry) + sizeof(*(entry)) > (end) || \ 27 (entry)->header.length != ACPI_MADT_GICC_LENGTH) 28 29 /* Basic configuration for ACPI */ 30 #ifdef CONFIG_ACPI 31 /* ACPI table mapping after acpi_gbl_permanent_mmap is set */ 32 static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, 33 acpi_size size) 34 { 35 if (!page_is_ram(phys >> PAGE_SHIFT)) 36 return ioremap(phys, size); 37 38 return ioremap_cache(phys, size); 39 } 40 #define acpi_os_ioremap acpi_os_ioremap 41 42 typedef u64 phys_cpuid_t; 43 #define PHYS_CPUID_INVALID INVALID_HWID 44 45 #define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */ 46 extern int acpi_disabled; 47 extern int acpi_noirq; 48 extern int acpi_pci_disabled; 49 50 static inline void disable_acpi(void) 51 { 52 acpi_disabled = 1; 53 acpi_pci_disabled = 1; 54 acpi_noirq = 1; 55 } 56 57 static inline void enable_acpi(void) 58 { 59 acpi_disabled = 0; 60 acpi_pci_disabled = 0; 61 acpi_noirq = 0; 62 } 63 64 /* 65 * The ACPI processor driver for ACPI core code needs this macro 66 * to find out this cpu was already mapped (mapping from CPU hardware 67 * ID to CPU logical ID) or not. 68 */ 69 #define cpu_physical_id(cpu) cpu_logical_map(cpu) 70 71 /* 72 * It's used from ACPI core in kdump to boot UP system with SMP kernel, 73 * with this check the ACPI core will not override the CPU index 74 * obtained from GICC with 0 and not print some error message as well. 75 * Since MADT must provide at least one GICC structure for GIC 76 * initialization, CPU will be always available in MADT on ARM64. 77 */ 78 static inline bool acpi_has_cpu_in_madt(void) 79 { 80 return true; 81 } 82 83 static inline void arch_fix_phys_package_id(int num, u32 slot) { } 84 void __init acpi_init_cpus(void); 85 86 #else 87 static inline void acpi_init_cpus(void) { } 88 #endif /* CONFIG_ACPI */ 89 90 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL 91 bool acpi_parking_protocol_valid(int cpu); 92 void __init 93 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor); 94 #else 95 static inline bool acpi_parking_protocol_valid(int cpu) { return false; } 96 static inline void 97 acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor) 98 {} 99 #endif 100 101 static inline const char *acpi_get_enable_method(int cpu) 102 { 103 if (acpi_psci_present()) 104 return "psci"; 105 106 if (acpi_parking_protocol_valid(cpu)) 107 return "parking-protocol"; 108 109 return NULL; 110 } 111 112 #ifdef CONFIG_ACPI_APEI 113 pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr); 114 #endif 115 116 #endif /*_ASM_ACPI_H*/ 117