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/irqchip/arm-gic-acpi.h> 17 18 #include <asm/cputype.h> 19 #include <asm/psci.h> 20 #include <asm/smp_plat.h> 21 22 /* Basic configuration for ACPI */ 23 #ifdef CONFIG_ACPI 24 /* ACPI table mapping after acpi_gbl_permanent_mmap is set */ 25 static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, 26 acpi_size size) 27 { 28 if (!page_is_ram(phys >> PAGE_SHIFT)) 29 return ioremap(phys, size); 30 31 return ioremap_cache(phys, size); 32 } 33 #define acpi_os_ioremap acpi_os_ioremap 34 35 typedef u64 phys_cpuid_t; 36 #define PHYS_CPUID_INVALID INVALID_HWID 37 38 #define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */ 39 extern int acpi_disabled; 40 extern int acpi_noirq; 41 extern int acpi_pci_disabled; 42 43 static inline void disable_acpi(void) 44 { 45 acpi_disabled = 1; 46 acpi_pci_disabled = 1; 47 acpi_noirq = 1; 48 } 49 50 static inline void enable_acpi(void) 51 { 52 acpi_disabled = 0; 53 acpi_pci_disabled = 0; 54 acpi_noirq = 0; 55 } 56 57 /* 58 * The ACPI processor driver for ACPI core code needs this macro 59 * to find out this cpu was already mapped (mapping from CPU hardware 60 * ID to CPU logical ID) or not. 61 */ 62 #define cpu_physical_id(cpu) cpu_logical_map(cpu) 63 64 /* 65 * It's used from ACPI core in kdump to boot UP system with SMP kernel, 66 * with this check the ACPI core will not override the CPU index 67 * obtained from GICC with 0 and not print some error message as well. 68 * Since MADT must provide at least one GICC structure for GIC 69 * initialization, CPU will be always available in MADT on ARM64. 70 */ 71 static inline bool acpi_has_cpu_in_madt(void) 72 { 73 return true; 74 } 75 76 static inline void arch_fix_phys_package_id(int num, u32 slot) { } 77 void __init acpi_init_cpus(void); 78 79 #else 80 static inline void acpi_init_cpus(void) { } 81 #endif /* CONFIG_ACPI */ 82 83 static inline const char *acpi_get_enable_method(int cpu) 84 { 85 return acpi_psci_present() ? "psci" : NULL; 86 } 87 #endif /*_ASM_ACPI_H*/ 88