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/*
* Copyright (C) 2013-2014, Linaro Ltd.
* Author: Al Stone <al.stone@linaro.org>
* Author: Graeme Gregory <graeme.gregory@linaro.org>
* Author: Hanjun Guo <hanjun.guo@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*/
#ifndef _ASM_ACPI_H
#define _ASM_ACPI_H
#include <linux/efi.h>
#include <linux/memblock.h>
#include <linux/psci.h>
#include <asm/cputype.h>
#include <asm/io.h>
#include <asm/ptrace.h>
#include <asm/smp_plat.h>
#include <asm/tlbflush.h>
/* Macros for consistency checks of the GICC subtable of MADT */
/*
* MADT GICC minimum length refers to the MADT GICC structure table length as
* defined in the earliest ACPI version supported on arm64, ie ACPI 5.1.
*
* The efficiency_class member was added to the
* struct acpi_madt_generic_interrupt to represent the MADT GICC structure
* "Processor Power Efficiency Class" field, added in ACPI 6.0 whose offset
* is therefore used to delimit the MADT GICC structure minimum length
* appropriately.
*/
#define ACPI_MADT_GICC_MIN_LENGTH ACPI_OFFSET( \
struct acpi_madt_generic_interrupt, efficiency_class)
#define BAD_MADT_GICC_ENTRY(entry, end) \
(!(entry) || (entry)->header.length < ACPI_MADT_GICC_MIN_LENGTH || \
(unsigned long)(entry) + (entry)->header.length > (end))
#define ACPI_MADT_GICC_SPE (ACPI_OFFSET(struct acpi_madt_generic_interrupt, \
spe_interrupt) + sizeof(u16))
/* Basic configuration for ACPI */
#ifdef CONFIG_ACPI
pgprot_t __acpi_get_mem_attribute(phys_addr_t addr);
/* ACPI table mapping after acpi_permanent_mmap is set */
static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
acpi_size size)
{
/* For normal memory we already have a cacheable mapping. */
if (memblock_is_map_memory(phys))
return (void __iomem *)__phys_to_virt(phys);
/*
* We should still honor the memory's attribute here because
* crash dump kernel possibly excludes some ACPI (reclaim)
* regions from memblock list.
*/
return __ioremap(phys, size, __acpi_get_mem_attribute(phys));
}
#define acpi_os_ioremap acpi_os_ioremap
typedef u64 phys_cpuid_t;
#define PHYS_CPUID_INVALID INVALID_HWID
#define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */
extern int acpi_disabled;
extern int acpi_noirq;
extern int acpi_pci_disabled;
static inline void disable_acpi(void)
{
acpi_disabled = 1;
acpi_pci_disabled = 1;
acpi_noirq = 1;
}
static inline void enable_acpi(void)
{
acpi_disabled = 0;
acpi_pci_disabled = 0;
acpi_noirq = 0;
}
/*
* The ACPI processor driver for ACPI core code needs this macro
* to find out this cpu was already mapped (mapping from CPU hardware
* ID to CPU logical ID) or not.
*/
#define cpu_physical_id(cpu) cpu_logical_map(cpu)
/*
* It's used from ACPI core in kdump to boot UP system with SMP kernel,
* with this check the ACPI core will not override the CPU index
* obtained from GICC with 0 and not print some error message as well.
* Since MADT must provide at least one GICC structure for GIC
* initialization, CPU will be always available in MADT on ARM64.
*/
static inline bool acpi_has_cpu_in_madt(void)
{
return true;
}
struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
{
return acpi_cpu_get_madt_gicc(cpu)->uid;
}
static inline void arch_fix_phys_package_id(int num, u32 slot) { }
void __init acpi_init_cpus(void);
int apei_claim_sea(struct pt_regs *regs);
#else
static inline void acpi_init_cpus(void) { }
static inline int apei_claim_sea(struct pt_regs *regs) { return -ENOENT; }
#endif /* CONFIG_ACPI */
#ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
bool acpi_parking_protocol_valid(int cpu);
void __init
acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor);
#else
static inline bool acpi_parking_protocol_valid(int cpu) { return false; }
static inline void
acpi_set_mailbox_entry(int cpu, struct acpi_madt_generic_interrupt *processor)
{}
#endif
static inline const char *acpi_get_enable_method(int cpu)
{
if (acpi_psci_present())
return "psci";
if (acpi_parking_protocol_valid(cpu))
return "parking-protocol";
return NULL;
}
#ifdef CONFIG_ACPI_APEI
/*
* acpi_disable_cmcff is used in drivers/acpi/apei/hest.c for disabling
* IA-32 Architecture Corrected Machine Check (CMC) Firmware-First mode
* with a kernel command line parameter "acpi=nocmcoff". But we don't
* have this IA-32 specific feature on ARM64, this definition is only
* for compatibility.
*/
#define acpi_disable_cmcff 1
static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
{
return __acpi_get_mem_attribute(addr);
}
#endif /* CONFIG_ACPI_APEI */
#ifdef CONFIG_ACPI_NUMA
int arm64_acpi_numa_init(void);
int acpi_numa_get_nid(unsigned int cpu);
void acpi_map_cpus_to_nodes(void);
#else
static inline int arm64_acpi_numa_init(void) { return -ENOSYS; }
static inline int acpi_numa_get_nid(unsigned int cpu) { return NUMA_NO_NODE; }
static inline void acpi_map_cpus_to_nodes(void) { }
#endif /* CONFIG_ACPI_NUMA */
#define ACPI_TABLE_UPGRADE_MAX_PHYS MEMBLOCK_ALLOC_ACCESSIBLE
#endif /*_ASM_ACPI_H*/
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