arch/x86/include/asm/x86_init.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_PLATFORM_H
   3 #define _ASM_X86_PLATFORM_H
   4
   5 #include <asm/bootparam.h>
   6
   7 struct mpc_bus;
   8 struct mpc_cpu;
   9 struct mpc_table;
  10 struct cpuinfo_x86;
  11
  12 /**
  13  * struct x86_init_mpparse - platform specific mpparse ops
  14  * @mpc_record:                 platform specific mpc record accounting
  15  * @setup_ioapic_ids:           platform specific ioapic id override
  16  * @mpc_apic_id:                platform specific mpc apic id assignment
  17  * @smp_read_mpc_oem:           platform specific oem mpc table setup
  18  * @mpc_oem_pci_bus:            platform specific pci bus setup (default NULL)
  19  * @mpc_oem_bus_info:           platform specific mpc bus info
  20  * @find_smp_config:            find the smp configuration
  21  * @get_smp_config:             get the smp configuration
  22  */
  23 struct x86_init_mpparse {
  24         void (*mpc_record)(unsigned int mode);
  25         void (*setup_ioapic_ids)(void);
  26         int (*mpc_apic_id)(struct mpc_cpu *m);
  27         void (*smp_read_mpc_oem)(struct mpc_table *mpc);
  28         void (*mpc_oem_pci_bus)(struct mpc_bus *m);
  29         void (*mpc_oem_bus_info)(struct mpc_bus *m, char *name);
  30         void (*find_smp_config)(void);
  31         void (*get_smp_config)(unsigned int early);
  32 };
  33
  34 /**
  35  * struct x86_init_resources - platform specific resource related ops
  36  * @probe_roms:                 probe BIOS roms
  37  * @reserve_resources:          reserve the standard resources for the
  38  *                              platform
  39  * @memory_setup:               platform specific memory setup
  40  *
  41  */
  42 struct x86_init_resources {
  43         void (*probe_roms)(void);
  44         void (*reserve_resources)(void);
  45         char *(*memory_setup)(void);
  46 };
  47
  48 /**
  49  * struct x86_init_irqs - platform specific interrupt setup
  50  * @pre_vector_init:            init code to run before interrupt vectors
  51  *                              are set up.
  52  * @intr_init:                  interrupt init code
  53  * @trap_init:                  platform specific trap setup
  54  * @intr_mode_init:             interrupt delivery mode setup
  55  */
  56 struct x86_init_irqs {
  57         void (*pre_vector_init)(void);
  58         void (*intr_init)(void);
  59         void (*trap_init)(void);
  60         void (*intr_mode_init)(void);
  61 };
  62
  63 /**
  64  * struct x86_init_oem - oem platform specific customizing functions
  65  * @arch_setup:                 platform specific architecture setup
  66  * @banner:                     print a platform specific banner
  67  */
  68 struct x86_init_oem {
  69         void (*arch_setup)(void);
  70         void (*banner)(void);
  71 };
  72
  73 /**
  74  * struct x86_init_paging - platform specific paging functions
  75  * @pagetable_init:     platform specific paging initialization call to setup
  76  *                      the kernel pagetables and prepare accessors functions.
  77  *                      Callback must call paging_init(). Called once after the
  78  *                      direct mapping for phys memory is available.
  79  */
  80 struct x86_init_paging {
  81         void (*pagetable_init)(void);
  82 };
  83
  84 /**
  85  * struct x86_init_timers - platform specific timer setup
  86  * @setup_perpcu_clockev:       set up the per cpu clock event device for the
  87  *                              boot cpu
  88  * @timer_init:                 initialize the platform timer (default PIT/HPET)
  89  * @wallclock_init:             init the wallclock device
  90  */
  91 struct x86_init_timers {
  92         void (*setup_percpu_clockev)(void);
  93         void (*timer_init)(void);
  94         void (*wallclock_init)(void);
  95 };
  96
  97 /**
  98  * struct x86_init_iommu - platform specific iommu setup
  99  * @iommu_init:                 platform specific iommu setup
 100  */
 101 struct x86_init_iommu {
 102         int (*iommu_init)(void);
 103 };
 104
 105 /**
 106  * struct x86_init_pci - platform specific pci init functions
 107  * @arch_init:                  platform specific pci arch init call
 108  * @init:                       platform specific pci subsystem init
 109  * @init_irq:                   platform specific pci irq init
 110  * @fixup_irqs:                 platform specific pci irq fixup
 111  */
 112 struct x86_init_pci {
 113         int (*arch_init)(void);
 114         int (*init)(void);
 115         void (*init_irq)(void);
 116         void (*fixup_irqs)(void);
 117 };
 118
 119 /**
 120  * struct x86_hyper_init - x86 hypervisor init functions
 121  * @init_platform:              platform setup
 122  * @guest_late_init:            guest late init
 123  * @x2apic_available:           X2APIC detection
 124  * @init_mem_mapping:           setup early mappings during init_mem_mapping()
 125  * @init_after_bootmem:         guest init after boot allocator is finished
 126  */
 127 struct x86_hyper_init {
 128         void (*init_platform)(void);
 129         void (*guest_late_init)(void);
 130         bool (*x2apic_available)(void);
 131         void (*init_mem_mapping)(void);
 132         void (*init_after_bootmem)(void);
 133 };
 134
 135 /**
 136  * struct x86_init_acpi - x86 ACPI init functions
 137  * @get_root_pointer:           get RSDP address
 138  * @reduced_hw_early_init:      hardware reduced platform early init
 139  */
 140 struct x86_init_acpi {
 141         u64 (*get_root_pointer)(void);
 142         void (*reduced_hw_early_init)(void);
 143 };
 144
 145 /**
 146  * struct x86_init_ops - functions for platform specific setup
 147  *
 148  */
 149 struct x86_init_ops {
 150         struct x86_init_resources       resources;
 151         struct x86_init_mpparse         mpparse;
 152         struct x86_init_irqs            irqs;
 153         struct x86_init_oem             oem;
 154         struct x86_init_paging          paging;
 155         struct x86_init_timers          timers;
 156         struct x86_init_iommu           iommu;
 157         struct x86_init_pci             pci;
 158         struct x86_hyper_init           hyper;
 159         struct x86_init_acpi            acpi;
 160 };
 161
 162 /**
 163  * struct x86_cpuinit_ops - platform specific cpu hotplug setups
 164  * @setup_percpu_clockev:       set up the per cpu clock event device
 165  * @early_percpu_clock_init:    early init of the per cpu clock event device
 166  */
 167 struct x86_cpuinit_ops {
 168         void (*setup_percpu_clockev)(void);
 169         void (*early_percpu_clock_init)(void);
 170         void (*fixup_cpu_id)(struct cpuinfo_x86 *c, int node);
 171 };
 172
 173 struct timespec64;
 174
 175 /**
 176  * struct x86_legacy_devices - legacy x86 devices
 177  *
 178  * @pnpbios: this platform can have a PNPBIOS. If this is disabled the platform
 179  *      is known to never have a PNPBIOS.
 180  *
 181  * These are devices known to require LPC or ISA bus. The definition of legacy
 182  * devices adheres to the ACPI 5.2.9.3 IA-PC Boot Architecture flag
 183  * ACPI_FADT_LEGACY_DEVICES. These devices consist of user visible devices on
 184  * the LPC or ISA bus. User visible devices are devices that have end-user
 185  * accessible connectors (for example, LPT parallel port). Legacy devices on
 186  * the LPC bus consist for example of serial and parallel ports, PS/2 keyboard
 187  * / mouse, and the floppy disk controller. A system that lacks all known
 188  * legacy devices can assume all devices can be detected exclusively via
 189  * standard device enumeration mechanisms including the ACPI namespace.
 190  *
 191  * A system which has does not have ACPI_FADT_LEGACY_DEVICES enabled must not
 192  * have any of the legacy devices enumerated below present.
 193  */
 194 struct x86_legacy_devices {
 195         int pnpbios;
 196 };
 197
 198 /**
 199  * enum x86_legacy_i8042_state - i8042 keyboard controller state
 200  * @X86_LEGACY_I8042_PLATFORM_ABSENT: the controller is always absent on
 201  *      given platform/subarch.
 202  * @X86_LEGACY_I8042_FIRMWARE_ABSENT: firmware reports that the controller
 203  *      is absent.
 204  * @X86_LEGACY_i8042_EXPECTED_PRESENT: the controller is likely to be
 205  *      present, the i8042 driver should probe for controller existence.
 206  */
 207 enum x86_legacy_i8042_state {
 208         X86_LEGACY_I8042_PLATFORM_ABSENT,
 209         X86_LEGACY_I8042_FIRMWARE_ABSENT,
 210         X86_LEGACY_I8042_EXPECTED_PRESENT,
 211 };
 212
 213 /**
 214  * struct x86_legacy_features - legacy x86 features
 215  *
 216  * @i8042: indicated if we expect the device to have i8042 controller
 217  *      present.
 218  * @rtc: this device has a CMOS real-time clock present
 219  * @reserve_bios_regions: boot code will search for the EBDA address and the
 220  *      start of the 640k - 1M BIOS region.  If false, the platform must
 221  *      ensure that its memory map correctly reserves sub-1MB regions as needed.
 222  * @devices: legacy x86 devices, refer to struct x86_legacy_devices
 223  *      documentation for further details.
 224  */
 225 struct x86_legacy_features {
 226         enum x86_legacy_i8042_state i8042;
 227         int rtc;
 228         int warm_reset;
 229         int no_vga;
 230         int reserve_bios_regions;
 231         struct x86_legacy_devices devices;
 232 };
 233
 234 /**
 235  * struct x86_hyper_runtime - x86 hypervisor specific runtime callbacks
 236  *
 237  * @pin_vcpu:           pin current vcpu to specified physical cpu (run rarely)
 238  */
 239 struct x86_hyper_runtime {
 240         void (*pin_vcpu)(int cpu);
 241 };
 242
 243 /**
 244  * struct x86_platform_ops - platform specific runtime functions
 245  * @calibrate_cpu:              calibrate CPU
 246  * @calibrate_tsc:              calibrate TSC, if different from CPU
 247  * @get_wallclock:              get time from HW clock like RTC etc.
 248  * @set_wallclock:              set time back to HW clock
 249  * @is_untracked_pat_range      exclude from PAT logic
 250  * @nmi_init                    enable NMI on cpus
 251  * @save_sched_clock_state:     save state for sched_clock() on suspend
 252  * @restore_sched_clock_state:  restore state for sched_clock() on resume
 253  * @apic_post_init:             adjust apic if needed
 254  * @legacy:                     legacy features
 255  * @set_legacy_features:        override legacy features. Use of this callback
 256  *                              is highly discouraged. You should only need
 257  *                              this if your hardware platform requires further
 258  *                              custom fine tuning far beyond what may be
 259  *                              possible in x86_early_init_platform_quirks() by
 260  *                              only using the current x86_hardware_subarch
 261  *                              semantics.
 262  * @hyper:                      x86 hypervisor specific runtime callbacks
 263  */
 264 struct x86_platform_ops {
 265         unsigned long (*calibrate_cpu)(void);
 266         unsigned long (*calibrate_tsc)(void);
 267         void (*get_wallclock)(struct timespec64 *ts);
 268         int (*set_wallclock)(const struct timespec64 *ts);
 269         void (*iommu_shutdown)(void);
 270         bool (*is_untracked_pat_range)(u64 start, u64 end);
 271         void (*nmi_init)(void);
 272         unsigned char (*get_nmi_reason)(void);
 273         void (*save_sched_clock_state)(void);
 274         void (*restore_sched_clock_state)(void);
 275         void (*apic_post_init)(void);
 276         struct x86_legacy_features legacy;
 277         void (*set_legacy_features)(void);
 278         struct x86_hyper_runtime hyper;
 279 };
 280
 281 struct pci_dev;
 282
 283 struct x86_msi_ops {
 284         int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type);
 285         void (*teardown_msi_irq)(unsigned int irq);
 286         void (*teardown_msi_irqs)(struct pci_dev *dev);
 287         void (*restore_msi_irqs)(struct pci_dev *dev);
 288 };
 289
 290 struct x86_apic_ops {
 291         unsigned int    (*io_apic_read)   (unsigned int apic, unsigned int reg);
 292         void            (*restore)(void);
 293 };
 294
 295 extern struct x86_init_ops x86_init;
 296 extern struct x86_cpuinit_ops x86_cpuinit;
 297 extern struct x86_platform_ops x86_platform;
 298 extern struct x86_msi_ops x86_msi;
 299 extern struct x86_apic_ops x86_apic_ops;
 300
 301 extern void x86_early_init_platform_quirks(void);
 302 extern void x86_init_noop(void);
 303 extern void x86_init_uint_noop(unsigned int unused);
 304 extern bool x86_pnpbios_disabled(void);
 305
 306 #endif