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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_X86_ACPI_H
#define _ASM_X86_ACPI_H
/*
* Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
* Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
*/
#include <acpi/pdc_intel.h>
#include <asm/numa.h>
#include <asm/fixmap.h>
#include <asm/processor.h>
#include <asm/mmu.h>
#include <asm/mpspec.h>
#include <asm/x86_init.h>
#ifdef CONFIG_ACPI_APEI
# include <asm/pgtable_types.h>
#endif
#ifdef CONFIG_ACPI
extern int acpi_lapic;
extern int acpi_ioapic;
extern int acpi_noirq;
extern int acpi_strict;
extern int acpi_disabled;
extern int acpi_pci_disabled;
extern int acpi_skip_timer_override;
extern int acpi_use_timer_override;
extern int acpi_fix_pin2_polarity;
extern int acpi_disable_cmcff;
extern u8 acpi_sci_flags;
extern u32 acpi_sci_override_gsi;
void acpi_pic_sci_set_trigger(unsigned int, u16);
struct device;
extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
int trigger, int polarity);
extern void (*__acpi_unregister_gsi)(u32 gsi);
static inline void disable_acpi(void)
{
acpi_disabled = 1;
acpi_pci_disabled = 1;
acpi_noirq = 1;
}
extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
static inline void acpi_disable_pci(void)
{
acpi_pci_disabled = 1;
acpi_noirq_set();
}
/* Low-level suspend routine. */
extern int (*acpi_suspend_lowlevel)(void);
/* Physical address to resume after wakeup */
unsigned long acpi_get_wakeup_address(void);
/*
* Check if the CPU can handle C2 and deeper
*/
static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
{
/*
* Early models (<=5) of AMD Opterons are not supposed to go into
* C2 state.
*
* Steppings 0x0A and later are good
*/
if (boot_cpu_data.x86 == 0x0F &&
boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
boot_cpu_data.x86_model <= 0x05 &&
boot_cpu_data.x86_stepping < 0x0A)
return 1;
else if (boot_cpu_has(X86_BUG_AMD_APIC_C1E))
return 1;
else
return max_cstate;
}
static inline bool arch_has_acpi_pdc(void)
{
struct cpuinfo_x86 *c = &cpu_data(0);
return (c->x86_vendor == X86_VENDOR_INTEL ||
c->x86_vendor == X86_VENDOR_CENTAUR);
}
static inline void arch_acpi_set_pdc_bits(u32 *buf)
{
struct cpuinfo_x86 *c = &cpu_data(0);
buf[2] |= ACPI_PDC_C_CAPABILITY_SMP;
if (cpu_has(c, X86_FEATURE_EST))
buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
if (cpu_has(c, X86_FEATURE_ACPI))
buf[2] |= ACPI_PDC_T_FFH;
/*
* If mwait/monitor is unsupported, C2/C3_FFH will be disabled
*/
if (!cpu_has(c, X86_FEATURE_MWAIT))
buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
}
static inline bool acpi_has_cpu_in_madt(void)
{
return !!acpi_lapic;
}
#define ACPI_HAVE_ARCH_SET_ROOT_POINTER
static inline void acpi_arch_set_root_pointer(u64 addr)
{
x86_init.acpi.set_root_pointer(addr);
}
#define ACPI_HAVE_ARCH_GET_ROOT_POINTER
static inline u64 acpi_arch_get_root_pointer(void)
{
return x86_init.acpi.get_root_pointer();
}
void acpi_generic_reduced_hw_init(void);
void x86_default_set_root_pointer(u64 addr);
u64 x86_default_get_root_pointer(void);
#else /* !CONFIG_ACPI */
#define acpi_lapic 0
#define acpi_ioapic 0
#define acpi_disable_cmcff 0
static inline void acpi_noirq_set(void) { }
static inline void acpi_disable_pci(void) { }
static inline void disable_acpi(void) { }
static inline void acpi_generic_reduced_hw_init(void) { }
static inline void x86_default_set_root_pointer(u64 addr) { }
static inline u64 x86_default_get_root_pointer(void)
{
return 0;
}
#endif /* !CONFIG_ACPI */
#define ARCH_HAS_POWER_INIT 1
#ifdef CONFIG_ACPI_NUMA
extern int x86_acpi_numa_init(void);
#endif /* CONFIG_ACPI_NUMA */
#ifdef CONFIG_ACPI_APEI
static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
{
/*
* We currently have no way to look up the EFI memory map
* attributes for a region in a consistent way, because the
* memmap is discarded after efi_free_boot_services(). So if
* you call efi_mem_attributes() during boot and at runtime,
* you could theoretically see different attributes.
*
* We are yet to see any x86 platforms that require anything
* other than PAGE_KERNEL (some ARM64 platforms require the
* equivalent of PAGE_KERNEL_NOCACHE). Additionally, if SME
* is active, the ACPI information will not be encrypted,
* so return PAGE_KERNEL_NOENC until we know differently.
*/
return PAGE_KERNEL_NOENC;
}
#endif
#define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT)
#endif /* _ASM_X86_ACPI_H */
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