1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_PLATFORM_H
3 #define _ASM_X86_PLATFORM_H
5 #include <asm/bootparam.h>
14 * struct x86_init_mpparse - platform specific mpparse ops
15 * @setup_ioapic_ids: platform specific ioapic id override
16 * @find_smp_config: find the smp configuration
17 * @get_smp_config: get the smp configuration
19 struct x86_init_mpparse {
20 void (*setup_ioapic_ids)(void);
21 void (*find_smp_config)(void);
22 void (*get_smp_config)(unsigned int early);
26 * struct x86_init_resources - platform specific resource related ops
27 * @probe_roms: probe BIOS roms
28 * @reserve_resources: reserve the standard resources for the
30 * @memory_setup: platform specific memory setup
33 struct x86_init_resources {
34 void (*probe_roms)(void);
35 void (*reserve_resources)(void);
36 char *(*memory_setup)(void);
40 * struct x86_init_irqs - platform specific interrupt setup
41 * @pre_vector_init: init code to run before interrupt vectors
43 * @intr_init: interrupt init code
44 * @intr_mode_select: interrupt delivery mode selection
45 * @intr_mode_init: interrupt delivery mode setup
46 * @create_pci_msi_domain: Create the PCI/MSI interrupt domain
48 struct x86_init_irqs {
49 void (*pre_vector_init)(void);
50 void (*intr_init)(void);
51 void (*intr_mode_select)(void);
52 void (*intr_mode_init)(void);
53 struct irq_domain *(*create_pci_msi_domain)(void);
57 * struct x86_init_oem - oem platform specific customizing functions
58 * @arch_setup: platform specific architecture setup
59 * @banner: print a platform specific banner
62 void (*arch_setup)(void);
67 * struct x86_init_paging - platform specific paging functions
68 * @pagetable_init: platform specific paging initialization call to setup
69 * the kernel pagetables and prepare accessors functions.
70 * Callback must call paging_init(). Called once after the
71 * direct mapping for phys memory is available.
73 struct x86_init_paging {
74 void (*pagetable_init)(void);
78 * struct x86_init_timers - platform specific timer setup
79 * @setup_perpcu_clockev: set up the per cpu clock event device for the
81 * @timer_init: initialize the platform timer (default PIT/HPET)
82 * @wallclock_init: init the wallclock device
84 struct x86_init_timers {
85 void (*setup_percpu_clockev)(void);
86 void (*timer_init)(void);
87 void (*wallclock_init)(void);
91 * struct x86_init_iommu - platform specific iommu setup
92 * @iommu_init: platform specific iommu setup
94 struct x86_init_iommu {
95 int (*iommu_init)(void);
99 * struct x86_init_pci - platform specific pci init functions
100 * @arch_init: platform specific pci arch init call
101 * @init: platform specific pci subsystem init
102 * @init_irq: platform specific pci irq init
103 * @fixup_irqs: platform specific pci irq fixup
105 struct x86_init_pci {
106 int (*arch_init)(void);
108 void (*init_irq)(void);
109 void (*fixup_irqs)(void);
113 * struct x86_hyper_init - x86 hypervisor init functions
114 * @init_platform: platform setup
115 * @guest_late_init: guest late init
116 * @x2apic_available: X2APIC detection
117 * @init_mem_mapping: setup early mappings during init_mem_mapping()
118 * @init_after_bootmem: guest init after boot allocator is finished
120 struct x86_hyper_init {
121 void (*init_platform)(void);
122 void (*guest_late_init)(void);
123 bool (*x2apic_available)(void);
124 void (*init_mem_mapping)(void);
125 void (*init_after_bootmem)(void);
129 * struct x86_init_acpi - x86 ACPI init functions
130 * @set_root_poitner: set RSDP address
131 * @get_root_pointer: get RSDP address
132 * @reduced_hw_early_init: hardware reduced platform early init
134 struct x86_init_acpi {
135 void (*set_root_pointer)(u64 addr);
136 u64 (*get_root_pointer)(void);
137 void (*reduced_hw_early_init)(void);
141 * struct x86_init_ops - functions for platform specific setup
144 struct x86_init_ops {
145 struct x86_init_resources resources;
146 struct x86_init_mpparse mpparse;
147 struct x86_init_irqs irqs;
148 struct x86_init_oem oem;
149 struct x86_init_paging paging;
150 struct x86_init_timers timers;
151 struct x86_init_iommu iommu;
152 struct x86_init_pci pci;
153 struct x86_hyper_init hyper;
154 struct x86_init_acpi acpi;
158 * struct x86_cpuinit_ops - platform specific cpu hotplug setups
159 * @setup_percpu_clockev: set up the per cpu clock event device
160 * @early_percpu_clock_init: early init of the per cpu clock event device
162 struct x86_cpuinit_ops {
163 void (*setup_percpu_clockev)(void);
164 void (*early_percpu_clock_init)(void);
165 void (*fixup_cpu_id)(struct cpuinfo_x86 *c, int node);
171 * struct x86_legacy_devices - legacy x86 devices
173 * @pnpbios: this platform can have a PNPBIOS. If this is disabled the platform
174 * is known to never have a PNPBIOS.
176 * These are devices known to require LPC or ISA bus. The definition of legacy
177 * devices adheres to the ACPI 5.2.9.3 IA-PC Boot Architecture flag
178 * ACPI_FADT_LEGACY_DEVICES. These devices consist of user visible devices on
179 * the LPC or ISA bus. User visible devices are devices that have end-user
180 * accessible connectors (for example, LPT parallel port). Legacy devices on
181 * the LPC bus consist for example of serial and parallel ports, PS/2 keyboard
182 * / mouse, and the floppy disk controller. A system that lacks all known
183 * legacy devices can assume all devices can be detected exclusively via
184 * standard device enumeration mechanisms including the ACPI namespace.
186 * A system which has does not have ACPI_FADT_LEGACY_DEVICES enabled must not
187 * have any of the legacy devices enumerated below present.
189 struct x86_legacy_devices {
194 * enum x86_legacy_i8042_state - i8042 keyboard controller state
195 * @X86_LEGACY_I8042_PLATFORM_ABSENT: the controller is always absent on
196 * given platform/subarch.
197 * @X86_LEGACY_I8042_FIRMWARE_ABSENT: firmware reports that the controller
199 * @X86_LEGACY_i8042_EXPECTED_PRESENT: the controller is likely to be
200 * present, the i8042 driver should probe for controller existence.
202 enum x86_legacy_i8042_state {
203 X86_LEGACY_I8042_PLATFORM_ABSENT,
204 X86_LEGACY_I8042_FIRMWARE_ABSENT,
205 X86_LEGACY_I8042_EXPECTED_PRESENT,
209 * struct x86_legacy_features - legacy x86 features
211 * @i8042: indicated if we expect the device to have i8042 controller
213 * @rtc: this device has a CMOS real-time clock present
214 * @reserve_bios_regions: boot code will search for the EBDA address and the
215 * start of the 640k - 1M BIOS region. If false, the platform must
216 * ensure that its memory map correctly reserves sub-1MB regions as needed.
217 * @devices: legacy x86 devices, refer to struct x86_legacy_devices
218 * documentation for further details.
220 struct x86_legacy_features {
221 enum x86_legacy_i8042_state i8042;
225 int reserve_bios_regions;
226 struct x86_legacy_devices devices;
230 * struct x86_hyper_runtime - x86 hypervisor specific runtime callbacks
232 * @pin_vcpu: pin current vcpu to specified physical cpu (run rarely)
234 struct x86_hyper_runtime {
235 void (*pin_vcpu)(int cpu);
239 * struct x86_platform_ops - platform specific runtime functions
240 * @calibrate_cpu: calibrate CPU
241 * @calibrate_tsc: calibrate TSC, if different from CPU
242 * @get_wallclock: get time from HW clock like RTC etc.
243 * @set_wallclock: set time back to HW clock
244 * @is_untracked_pat_range exclude from PAT logic
245 * @nmi_init enable NMI on cpus
246 * @save_sched_clock_state: save state for sched_clock() on suspend
247 * @restore_sched_clock_state: restore state for sched_clock() on resume
248 * @apic_post_init: adjust apic if needed
249 * @legacy: legacy features
250 * @set_legacy_features: override legacy features. Use of this callback
251 * is highly discouraged. You should only need
252 * this if your hardware platform requires further
253 * custom fine tuning far beyond what may be
254 * possible in x86_early_init_platform_quirks() by
255 * only using the current x86_hardware_subarch
257 * @hyper: x86 hypervisor specific runtime callbacks
259 struct x86_platform_ops {
260 unsigned long (*calibrate_cpu)(void);
261 unsigned long (*calibrate_tsc)(void);
262 void (*get_wallclock)(struct timespec64 *ts);
263 int (*set_wallclock)(const struct timespec64 *ts);
264 void (*iommu_shutdown)(void);
265 bool (*is_untracked_pat_range)(u64 start, u64 end);
266 void (*nmi_init)(void);
267 unsigned char (*get_nmi_reason)(void);
268 void (*save_sched_clock_state)(void);
269 void (*restore_sched_clock_state)(void);
270 void (*apic_post_init)(void);
271 struct x86_legacy_features legacy;
272 void (*set_legacy_features)(void);
273 struct x86_hyper_runtime hyper;
279 int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type);
280 void (*teardown_msi_irqs)(struct pci_dev *dev);
281 void (*restore_msi_irqs)(struct pci_dev *dev);
284 struct x86_apic_ops {
285 unsigned int (*io_apic_read) (unsigned int apic, unsigned int reg);
286 void (*restore)(void);
289 extern struct x86_init_ops x86_init;
290 extern struct x86_cpuinit_ops x86_cpuinit;
291 extern struct x86_platform_ops x86_platform;
292 extern struct x86_msi_ops x86_msi;
293 extern struct x86_apic_ops x86_apic_ops;
295 extern void x86_early_init_platform_quirks(void);
296 extern void x86_init_noop(void);
297 extern void x86_init_uint_noop(unsigned int unused);
298 extern bool bool_x86_init_noop(void);
299 extern void x86_op_int_noop(int cpu);
300 extern bool x86_pnpbios_disabled(void);