1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_PLATFORM_H
3 #define _ASM_X86_PLATFORM_H
5 #include <asm/bootparam.h>
13 * struct x86_init_mpparse - platform specific mpparse ops
14 * @setup_ioapic_ids: platform specific ioapic id override
15 * @find_smp_config: find the smp configuration
16 * @get_smp_config: get the smp configuration
18 struct x86_init_mpparse {
19 void (*setup_ioapic_ids)(void);
20 void (*find_smp_config)(void);
21 void (*get_smp_config)(unsigned int early);
25 * struct x86_init_resources - platform specific resource related ops
26 * @probe_roms: probe BIOS roms
27 * @reserve_resources: reserve the standard resources for the
29 * @memory_setup: platform specific memory setup
32 struct x86_init_resources {
33 void (*probe_roms)(void);
34 void (*reserve_resources)(void);
35 char *(*memory_setup)(void);
39 * struct x86_init_irqs - platform specific interrupt setup
40 * @pre_vector_init: init code to run before interrupt vectors
42 * @intr_init: interrupt init code
43 * @intr_mode_select: interrupt delivery mode selection
44 * @intr_mode_init: interrupt delivery mode setup
46 struct x86_init_irqs {
47 void (*pre_vector_init)(void);
48 void (*intr_init)(void);
49 void (*intr_mode_select)(void);
50 void (*intr_mode_init)(void);
54 * struct x86_init_oem - oem platform specific customizing functions
55 * @arch_setup: platform specific architecture setup
56 * @banner: print a platform specific banner
59 void (*arch_setup)(void);
64 * struct x86_init_paging - platform specific paging functions
65 * @pagetable_init: platform specific paging initialization call to setup
66 * the kernel pagetables and prepare accessors functions.
67 * Callback must call paging_init(). Called once after the
68 * direct mapping for phys memory is available.
70 struct x86_init_paging {
71 void (*pagetable_init)(void);
75 * struct x86_init_timers - platform specific timer setup
76 * @setup_perpcu_clockev: set up the per cpu clock event device for the
78 * @timer_init: initialize the platform timer (default PIT/HPET)
79 * @wallclock_init: init the wallclock device
81 struct x86_init_timers {
82 void (*setup_percpu_clockev)(void);
83 void (*timer_init)(void);
84 void (*wallclock_init)(void);
88 * struct x86_init_iommu - platform specific iommu setup
89 * @iommu_init: platform specific iommu setup
91 struct x86_init_iommu {
92 int (*iommu_init)(void);
96 * struct x86_init_pci - platform specific pci init functions
97 * @arch_init: platform specific pci arch init call
98 * @init: platform specific pci subsystem init
99 * @init_irq: platform specific pci irq init
100 * @fixup_irqs: platform specific pci irq fixup
102 struct x86_init_pci {
103 int (*arch_init)(void);
105 void (*init_irq)(void);
106 void (*fixup_irqs)(void);
110 * struct x86_hyper_init - x86 hypervisor init functions
111 * @init_platform: platform setup
112 * @guest_late_init: guest late init
113 * @x2apic_available: X2APIC detection
114 * @init_mem_mapping: setup early mappings during init_mem_mapping()
115 * @init_after_bootmem: guest init after boot allocator is finished
117 struct x86_hyper_init {
118 void (*init_platform)(void);
119 void (*guest_late_init)(void);
120 bool (*x2apic_available)(void);
121 void (*init_mem_mapping)(void);
122 void (*init_after_bootmem)(void);
126 * struct x86_init_acpi - x86 ACPI init functions
127 * @set_root_poitner: set RSDP address
128 * @get_root_pointer: get RSDP address
129 * @reduced_hw_early_init: hardware reduced platform early init
131 struct x86_init_acpi {
132 void (*set_root_pointer)(u64 addr);
133 u64 (*get_root_pointer)(void);
134 void (*reduced_hw_early_init)(void);
138 * struct x86_init_ops - functions for platform specific setup
141 struct x86_init_ops {
142 struct x86_init_resources resources;
143 struct x86_init_mpparse mpparse;
144 struct x86_init_irqs irqs;
145 struct x86_init_oem oem;
146 struct x86_init_paging paging;
147 struct x86_init_timers timers;
148 struct x86_init_iommu iommu;
149 struct x86_init_pci pci;
150 struct x86_hyper_init hyper;
151 struct x86_init_acpi acpi;
155 * struct x86_cpuinit_ops - platform specific cpu hotplug setups
156 * @setup_percpu_clockev: set up the per cpu clock event device
157 * @early_percpu_clock_init: early init of the per cpu clock event device
159 struct x86_cpuinit_ops {
160 void (*setup_percpu_clockev)(void);
161 void (*early_percpu_clock_init)(void);
162 void (*fixup_cpu_id)(struct cpuinfo_x86 *c, int node);
168 * struct x86_legacy_devices - legacy x86 devices
170 * @pnpbios: this platform can have a PNPBIOS. If this is disabled the platform
171 * is known to never have a PNPBIOS.
173 * These are devices known to require LPC or ISA bus. The definition of legacy
174 * devices adheres to the ACPI 5.2.9.3 IA-PC Boot Architecture flag
175 * ACPI_FADT_LEGACY_DEVICES. These devices consist of user visible devices on
176 * the LPC or ISA bus. User visible devices are devices that have end-user
177 * accessible connectors (for example, LPT parallel port). Legacy devices on
178 * the LPC bus consist for example of serial and parallel ports, PS/2 keyboard
179 * / mouse, and the floppy disk controller. A system that lacks all known
180 * legacy devices can assume all devices can be detected exclusively via
181 * standard device enumeration mechanisms including the ACPI namespace.
183 * A system which has does not have ACPI_FADT_LEGACY_DEVICES enabled must not
184 * have any of the legacy devices enumerated below present.
186 struct x86_legacy_devices {
191 * enum x86_legacy_i8042_state - i8042 keyboard controller state
192 * @X86_LEGACY_I8042_PLATFORM_ABSENT: the controller is always absent on
193 * given platform/subarch.
194 * @X86_LEGACY_I8042_FIRMWARE_ABSENT: firmware reports that the controller
196 * @X86_LEGACY_i8042_EXPECTED_PRESENT: the controller is likely to be
197 * present, the i8042 driver should probe for controller existence.
199 enum x86_legacy_i8042_state {
200 X86_LEGACY_I8042_PLATFORM_ABSENT,
201 X86_LEGACY_I8042_FIRMWARE_ABSENT,
202 X86_LEGACY_I8042_EXPECTED_PRESENT,
206 * struct x86_legacy_features - legacy x86 features
208 * @i8042: indicated if we expect the device to have i8042 controller
210 * @rtc: this device has a CMOS real-time clock present
211 * @reserve_bios_regions: boot code will search for the EBDA address and the
212 * start of the 640k - 1M BIOS region. If false, the platform must
213 * ensure that its memory map correctly reserves sub-1MB regions as needed.
214 * @devices: legacy x86 devices, refer to struct x86_legacy_devices
215 * documentation for further details.
217 struct x86_legacy_features {
218 enum x86_legacy_i8042_state i8042;
222 int reserve_bios_regions;
223 struct x86_legacy_devices devices;
227 * struct x86_hyper_runtime - x86 hypervisor specific runtime callbacks
229 * @pin_vcpu: pin current vcpu to specified physical cpu (run rarely)
231 struct x86_hyper_runtime {
232 void (*pin_vcpu)(int cpu);
236 * struct x86_platform_ops - platform specific runtime functions
237 * @calibrate_cpu: calibrate CPU
238 * @calibrate_tsc: calibrate TSC, if different from CPU
239 * @get_wallclock: get time from HW clock like RTC etc.
240 * @set_wallclock: set time back to HW clock
241 * @is_untracked_pat_range exclude from PAT logic
242 * @nmi_init enable NMI on cpus
243 * @save_sched_clock_state: save state for sched_clock() on suspend
244 * @restore_sched_clock_state: restore state for sched_clock() on resume
245 * @apic_post_init: adjust apic if needed
246 * @legacy: legacy features
247 * @set_legacy_features: override legacy features. Use of this callback
248 * is highly discouraged. You should only need
249 * this if your hardware platform requires further
250 * custom fine tuning far beyond what may be
251 * possible in x86_early_init_platform_quirks() by
252 * only using the current x86_hardware_subarch
254 * @hyper: x86 hypervisor specific runtime callbacks
256 struct x86_platform_ops {
257 unsigned long (*calibrate_cpu)(void);
258 unsigned long (*calibrate_tsc)(void);
259 void (*get_wallclock)(struct timespec64 *ts);
260 int (*set_wallclock)(const struct timespec64 *ts);
261 void (*iommu_shutdown)(void);
262 bool (*is_untracked_pat_range)(u64 start, u64 end);
263 void (*nmi_init)(void);
264 unsigned char (*get_nmi_reason)(void);
265 void (*save_sched_clock_state)(void);
266 void (*restore_sched_clock_state)(void);
267 void (*apic_post_init)(void);
268 struct x86_legacy_features legacy;
269 void (*set_legacy_features)(void);
270 struct x86_hyper_runtime hyper;
276 int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type);
277 void (*teardown_msi_irq)(unsigned int irq);
278 void (*teardown_msi_irqs)(struct pci_dev *dev);
279 void (*restore_msi_irqs)(struct pci_dev *dev);
282 struct x86_apic_ops {
283 unsigned int (*io_apic_read) (unsigned int apic, unsigned int reg);
284 void (*restore)(void);
287 extern struct x86_init_ops x86_init;
288 extern struct x86_cpuinit_ops x86_cpuinit;
289 extern struct x86_platform_ops x86_platform;
290 extern struct x86_msi_ops x86_msi;
291 extern struct x86_apic_ops x86_apic_ops;
293 extern void x86_early_init_platform_quirks(void);
294 extern void x86_init_noop(void);
295 extern void x86_init_uint_noop(unsigned int unused);
296 extern bool bool_x86_init_noop(void);
297 extern void x86_op_int_noop(int cpu);
298 extern bool x86_pnpbios_disabled(void);