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 */
32static 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
42typedef u64 phys_cpuid_t;
43#define PHYS_CPUID_INVALID INVALID_HWID
44
45#define acpi_strict 1	/* No out-of-spec workarounds on ARM64 */
46extern int acpi_disabled;
47extern int acpi_noirq;
48extern int acpi_pci_disabled;
49
50static inline void disable_acpi(void)
51{
52	acpi_disabled = 1;
53	acpi_pci_disabled = 1;
54	acpi_noirq = 1;
55}
56
57static 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 */
78static inline bool acpi_has_cpu_in_madt(void)
79{
80	return true;
81}
82
83static inline void arch_fix_phys_package_id(int num, u32 slot) { }
84void __init acpi_init_cpus(void);
85
86#else
87static inline void acpi_init_cpus(void) { }
88#endif /* CONFIG_ACPI */
89
90static inline const char *acpi_get_enable_method(int cpu)
91{
92	return acpi_psci_present() ? "psci" : NULL;
93}
94
95#ifdef	CONFIG_ACPI_APEI
96pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
97#endif
98
99#endif /*_ASM_ACPI_H*/
100