/* 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/proc_cap_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>
#include <asm/cpufeature.h>
#include <asm/irq_vectors.h>
#include <asm/xen/hypervisor.h>

#include <xen/xen.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 bool acpi_int_src_ovr[NR_IRQS_LEGACY];

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);

extern int acpi_blacklisted(void);

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);

static inline bool acpi_skip_set_wakeup_address(void)
{
        return cpu_feature_enabled(X86_FEATURE_XENPV);
}

#define acpi_skip_set_wakeup_address acpi_skip_set_wakeup_address

union acpi_subtable_headers;

int __init acpi_parse_mp_wake(union acpi_subtable_headers *header,
                              const unsigned long end);

void asm_acpi_mp_play_dead(u64 reset_vector, u64 pgd_pa);

/*
 * 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_proc_cap_bits(u32 *cap)
{
        struct cpuinfo_x86 *c = &cpu_data(0);

        *cap |= ACPI_PROC_CAP_C_CAPABILITY_SMP;

        /* Enable coordination with firmware's _TSD info */
        *cap |= ACPI_PROC_CAP_SMP_T_SWCOORD;

        if (cpu_has(c, X86_FEATURE_EST))
                *cap |= ACPI_PROC_CAP_EST_CAPABILITY_SWSMP;

        if (cpu_has(c, X86_FEATURE_ACPI))
                *cap |= ACPI_PROC_CAP_T_FFH;

        if (cpu_has(c, X86_FEATURE_HWP))
                *cap |= ACPI_PROC_CAP_COLLAB_PROC_PERF;

        /*
         * If mwait/monitor is unsupported, C_C1_FFH and
         * C2/C3_FFH will be disabled.
         */
        if (!cpu_has(c, X86_FEATURE_MWAIT) ||
            boot_option_idle_override == IDLE_NOMWAIT)
                *cap &= ~(ACPI_PROC_CAP_C_C1_FFH | ACPI_PROC_CAP_C_C2C3_FFH);

        if (xen_initial_domain()) {
                /*
                 * When Linux is running as Xen dom0, the hypervisor is the
                 * entity in charge of the processor power management, and so
                 * Xen needs to check the OS capabilities reported in the
                 * processor capabilities buffer matches what the hypervisor
                 * driver supports.
                 */
                xen_sanitize_proc_cap_bits(cap);
        }
}

static inline bool acpi_has_cpu_in_madt(void)
{
        return !!acpi_lapic;
}

#define ACPI_HAVE_ARCH_SET_ROOT_POINTER
static __always_inline void acpi_arch_set_root_pointer(u64 addr)
{
        x86_init.acpi.set_root_pointer(addr);
}

#define ACPI_HAVE_ARCH_GET_ROOT_POINTER
static __always_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);

#ifdef CONFIG_XEN_PV
/* A Xen PV domain needs a special acpi_os_ioremap() handling. */
extern void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys,
                                         acpi_size size);
void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
#define acpi_os_ioremap acpi_os_ioremap
#endif

#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 */

struct cper_ia_proc_ctx;

#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;
}

int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
                               u64 lapic_id);
#else
static inline int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
                                             u64 lapic_id)
{
        return -EINVAL;
}
#endif

#define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT)

#endif /* _ASM_X86_ACPI_H */