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/smp_plat.h>
20
21/* Basic configuration for ACPI */
22#ifdef	CONFIG_ACPI
23/* ACPI table mapping after acpi_gbl_permanent_mmap is set */
24static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
25					    acpi_size size)
26{
27	if (!page_is_ram(phys >> PAGE_SHIFT))
28		return ioremap(phys, size);
29
30	return ioremap_cache(phys, size);
31}
32#define acpi_os_ioremap acpi_os_ioremap
33
34typedef u64 phys_cpuid_t;
35#define PHYS_CPUID_INVALID INVALID_HWID
36
37#define acpi_strict 1	/* No out-of-spec workarounds on ARM64 */
38extern int acpi_disabled;
39extern int acpi_noirq;
40extern int acpi_pci_disabled;
41
42/* 1 to indicate PSCI 0.2+ is implemented */
43static inline bool acpi_psci_present(void)
44{
45	return acpi_gbl_FADT.arm_boot_flags & ACPI_FADT_PSCI_COMPLIANT;
46}
47
48/* 1 to indicate HVC must be used instead of SMC as the PSCI conduit */
49static inline bool acpi_psci_use_hvc(void)
50{
51	return acpi_gbl_FADT.arm_boot_flags & ACPI_FADT_PSCI_USE_HVC;
52}
53
54static inline void disable_acpi(void)
55{
56	acpi_disabled = 1;
57	acpi_pci_disabled = 1;
58	acpi_noirq = 1;
59}
60
61static inline void enable_acpi(void)
62{
63	acpi_disabled = 0;
64	acpi_pci_disabled = 0;
65	acpi_noirq = 0;
66}
67
68/*
69 * The ACPI processor driver for ACPI core code needs this macro
70 * to find out this cpu was already mapped (mapping from CPU hardware
71 * ID to CPU logical ID) or not.
72 */
73#define cpu_physical_id(cpu) cpu_logical_map(cpu)
74
75/*
76 * It's used from ACPI core in kdump to boot UP system with SMP kernel,
77 * with this check the ACPI core will not override the CPU index
78 * obtained from GICC with 0 and not print some error message as well.
79 * Since MADT must provide at least one GICC structure for GIC
80 * initialization, CPU will be always available in MADT on ARM64.
81 */
82static inline bool acpi_has_cpu_in_madt(void)
83{
84	return true;
85}
86
87static inline void arch_fix_phys_package_id(int num, u32 slot) { }
88void __init acpi_init_cpus(void);
89
90#else
91static inline bool acpi_psci_present(void) { return false; }
92static inline bool acpi_psci_use_hvc(void) { return false; }
93static inline void acpi_init_cpus(void) { }
94#endif /* CONFIG_ACPI */
95
96#endif /*_ASM_ACPI_H*/
97