x86_init.h 9.2 KB
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_PLATFORM_H
#define _ASM_X86_PLATFORM_H

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#include <asm/bootparam.h>
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struct mpc_bus;
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struct mpc_cpu;
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struct mpc_table;
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struct cpuinfo_x86;
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/**
 * struct x86_init_mpparse - platform specific mpparse ops
 * @mpc_record:			platform specific mpc record accounting
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 * @setup_ioapic_ids:		platform specific ioapic id override
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 * @mpc_apic_id:		platform specific mpc apic id assignment
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 * @smp_read_mpc_oem:		platform specific oem mpc table setup
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 * @mpc_oem_pci_bus:		platform specific pci bus setup (default NULL)
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 * @mpc_oem_bus_info:		platform specific mpc bus info
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 * @find_smp_config:		find the smp configuration
 * @get_smp_config:		get the smp configuration
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 */
struct x86_init_mpparse {
	void (*mpc_record)(unsigned int mode);
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	void (*setup_ioapic_ids)(void);
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	int (*mpc_apic_id)(struct mpc_cpu *m);
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	void (*smp_read_mpc_oem)(struct mpc_table *mpc);
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	void (*mpc_oem_pci_bus)(struct mpc_bus *m);
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	void (*mpc_oem_bus_info)(struct mpc_bus *m, char *name);
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	void (*find_smp_config)(void);
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	void (*get_smp_config)(unsigned int early);
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};

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/**
 * struct x86_init_resources - platform specific resource related ops
 * @probe_roms:			probe BIOS roms
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 * @reserve_resources:		reserve the standard resources for the
 *				platform
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 * @memory_setup:		platform specific memory setup
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 *
 */
struct x86_init_resources {
	void (*probe_roms)(void);
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	void (*reserve_resources)(void);
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	char *(*memory_setup)(void);
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};

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/**
 * struct x86_init_irqs - platform specific interrupt setup
 * @pre_vector_init:		init code to run before interrupt vectors
 *				are set up.
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 * @intr_init:			interrupt init code
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 * @trap_init:			platform specific trap setup
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 * @intr_mode_init:		interrupt delivery mode setup
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 */
struct x86_init_irqs {
	void (*pre_vector_init)(void);
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	void (*intr_init)(void);
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	void (*trap_init)(void);
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	void (*intr_mode_init)(void);
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};

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/**
 * struct x86_init_oem - oem platform specific customizing functions
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 * @arch_setup:			platform specific architecture setup
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 * @banner:			print a platform specific banner
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 */
struct x86_init_oem {
	void (*arch_setup)(void);
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	void (*banner)(void);
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};

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/**
 * struct x86_init_paging - platform specific paging functions
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 * @pagetable_init:	platform specific paging initialization call to setup
 *			the kernel pagetables and prepare accessors functions.
 *			Callback must call paging_init(). Called once after the
 *			direct mapping for phys memory is available.
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 */
struct x86_init_paging {
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	void (*pagetable_init)(void);
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};

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/**
 * struct x86_init_timers - platform specific timer setup
 * @setup_perpcu_clockev:	set up the per cpu clock event device for the
 *				boot cpu
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 * @timer_init:			initialize the platform timer (default PIT/HPET)
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 * @wallclock_init:		init the wallclock device
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 */
struct x86_init_timers {
	void (*setup_percpu_clockev)(void);
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	void (*timer_init)(void);
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	void (*wallclock_init)(void);
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};

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/**
 * struct x86_init_iommu - platform specific iommu setup
 * @iommu_init:			platform specific iommu setup
 */
struct x86_init_iommu {
	int (*iommu_init)(void);
};

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/**
 * struct x86_init_pci - platform specific pci init functions
 * @arch_init:			platform specific pci arch init call
 * @init:			platform specific pci subsystem init
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 * @init_irq:			platform specific pci irq init
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 * @fixup_irqs:			platform specific pci irq fixup
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 */
struct x86_init_pci {
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	int (*arch_init)(void);
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	int (*init)(void);
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	void (*init_irq)(void);
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	void (*fixup_irqs)(void);
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};

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/**
 * struct x86_hyper_init - x86 hypervisor init functions
 * @init_platform:		platform setup
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 * @guest_late_init:		guest late init
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 * @x2apic_available:		X2APIC detection
 * @init_mem_mapping:		setup early mappings during init_mem_mapping()
 */
struct x86_hyper_init {
	void (*init_platform)(void);
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	void (*guest_late_init)(void);
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	bool (*x2apic_available)(void);
	void (*init_mem_mapping)(void);
};

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/**
 * struct x86_init_ops - functions for platform specific setup
 *
 */
struct x86_init_ops {
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	struct x86_init_resources	resources;
	struct x86_init_mpparse		mpparse;
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	struct x86_init_irqs		irqs;
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	struct x86_init_oem		oem;
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	struct x86_init_paging		paging;
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	struct x86_init_timers		timers;
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	struct x86_init_iommu		iommu;
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	struct x86_init_pci		pci;
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	struct x86_hyper_init		hyper;
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};

/**
 * struct x86_cpuinit_ops - platform specific cpu hotplug setups
 * @setup_percpu_clockev:	set up the per cpu clock event device
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 * @early_percpu_clock_init:	early init of the per cpu clock event device
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 */
struct x86_cpuinit_ops {
	void (*setup_percpu_clockev)(void);
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	void (*early_percpu_clock_init)(void);
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	void (*fixup_cpu_id)(struct cpuinfo_x86 *c, int node);
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};

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struct timespec;

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/**
 * struct x86_legacy_devices - legacy x86 devices
 *
 * @pnpbios: this platform can have a PNPBIOS. If this is disabled the platform
 * 	is known to never have a PNPBIOS.
 *
 * These are devices known to require LPC or ISA bus. The definition of legacy
 * devices adheres to the ACPI 5.2.9.3 IA-PC Boot Architecture flag
 * ACPI_FADT_LEGACY_DEVICES. These devices consist of user visible devices on
 * the LPC or ISA bus. User visible devices are devices that have end-user
 * accessible connectors (for example, LPT parallel port). Legacy devices on
 * the LPC bus consist for example of serial and parallel ports, PS/2 keyboard
 * / mouse, and the floppy disk controller. A system that lacks all known
 * legacy devices can assume all devices can be detected exclusively via
 * standard device enumeration mechanisms including the ACPI namespace.
 *
 * A system which has does not have ACPI_FADT_LEGACY_DEVICES enabled must not
 * have any of the legacy devices enumerated below present.
 */
struct x86_legacy_devices {
	int pnpbios;
};

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/**
 * enum x86_legacy_i8042_state - i8042 keyboard controller state
 * @X86_LEGACY_I8042_PLATFORM_ABSENT: the controller is always absent on
 *	given platform/subarch.
 * @X86_LEGACY_I8042_FIRMWARE_ABSENT: firmware reports that the controller
 *	is absent.
 * @X86_LEGACY_i8042_EXPECTED_PRESENT: the controller is likely to be
 *	present, the i8042 driver should probe for controller existence.
 */
enum x86_legacy_i8042_state {
	X86_LEGACY_I8042_PLATFORM_ABSENT,
	X86_LEGACY_I8042_FIRMWARE_ABSENT,
	X86_LEGACY_I8042_EXPECTED_PRESENT,
};

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/**
 * struct x86_legacy_features - legacy x86 features
 *
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 * @i8042: indicated if we expect the device to have i8042 controller
 *	present.
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 * @rtc: this device has a CMOS real-time clock present
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 * @reserve_bios_regions: boot code will search for the EBDA address and the
 * 	start of the 640k - 1M BIOS region.  If false, the platform must
 * 	ensure that its memory map correctly reserves sub-1MB regions as needed.
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 * @devices: legacy x86 devices, refer to struct x86_legacy_devices
 * 	documentation for further details.
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 */
struct x86_legacy_features {
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	enum x86_legacy_i8042_state i8042;
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	int rtc;
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	int warm_reset;
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	int no_vga;
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	int reserve_bios_regions;
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	struct x86_legacy_devices devices;
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};

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/**
 * struct x86_hyper_runtime - x86 hypervisor specific runtime callbacks
 *
 * @pin_vcpu:		pin current vcpu to specified physical cpu (run rarely)
 */
struct x86_hyper_runtime {
	void (*pin_vcpu)(int cpu);
};

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/**
 * struct x86_platform_ops - platform specific runtime functions
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 * @calibrate_cpu:		calibrate CPU
 * @calibrate_tsc:		calibrate TSC, if different from CPU
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 * @get_wallclock:		get time from HW clock like RTC etc.
 * @set_wallclock:		set time back to HW clock
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 * @is_untracked_pat_range	exclude from PAT logic
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 * @nmi_init			enable NMI on cpus
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 * @save_sched_clock_state:	save state for sched_clock() on suspend
 * @restore_sched_clock_state:	restore state for sched_clock() on resume
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 * @apic_post_init:		adjust apic if needed
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 * @legacy:			legacy features
 * @set_legacy_features:	override legacy features. Use of this callback
 * 				is highly discouraged. You should only need
 * 				this if your hardware platform requires further
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 * 				custom fine tuning far beyond what may be
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 * 				possible in x86_early_init_platform_quirks() by
 * 				only using the current x86_hardware_subarch
 * 				semantics.
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 * @hyper:			x86 hypervisor specific runtime callbacks
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 */
struct x86_platform_ops {
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	unsigned long (*calibrate_cpu)(void);
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	unsigned long (*calibrate_tsc)(void);
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	void (*get_wallclock)(struct timespec *ts);
	int (*set_wallclock)(const struct timespec *ts);
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	void (*iommu_shutdown)(void);
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	bool (*is_untracked_pat_range)(u64 start, u64 end);
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	void (*nmi_init)(void);
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	unsigned char (*get_nmi_reason)(void);
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	void (*save_sched_clock_state)(void);
	void (*restore_sched_clock_state)(void);
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	void (*apic_post_init)(void);
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	struct x86_legacy_features legacy;
	void (*set_legacy_features)(void);
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	struct x86_hyper_runtime hyper;
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};

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struct pci_dev;

struct x86_msi_ops {
	int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type);
	void (*teardown_msi_irq)(unsigned int irq);
	void (*teardown_msi_irqs)(struct pci_dev *dev);
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	void (*restore_msi_irqs)(struct pci_dev *dev);
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};

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struct x86_io_apic_ops {
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	unsigned int	(*read)   (unsigned int apic, unsigned int reg);
	void		(*disable)(void);
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};

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extern struct x86_init_ops x86_init;
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extern struct x86_cpuinit_ops x86_cpuinit;
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extern struct x86_platform_ops x86_platform;
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extern struct x86_msi_ops x86_msi;
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extern struct x86_io_apic_ops x86_io_apic_ops;
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extern void x86_early_init_platform_quirks(void);
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extern void x86_init_noop(void);
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extern void x86_init_uint_noop(unsigned int unused);
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#endif