summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/x86_init.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/x86/kernel/x86_init.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/kernel/x86_init.c')
-rw-r--r--arch/x86/kernel/x86_init.c166
1 files changed, 166 insertions, 0 deletions
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
new file mode 100644
index 000000000..41e5b4cb8
--- /dev/null
+++ b/arch/x86/kernel/x86_init.c
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2009 Thomas Gleixner <tglx@linutronix.de>
+ *
+ * For licencing details see kernel-base/COPYING
+ */
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/export.h>
+#include <linux/pci.h>
+
+#include <asm/acpi.h>
+#include <asm/bios_ebda.h>
+#include <asm/paravirt.h>
+#include <asm/pci_x86.h>
+#include <asm/mpspec.h>
+#include <asm/setup.h>
+#include <asm/apic.h>
+#include <asm/e820/api.h>
+#include <asm/time.h>
+#include <asm/irq.h>
+#include <asm/io_apic.h>
+#include <asm/hpet.h>
+#include <asm/memtype.h>
+#include <asm/tsc.h>
+#include <asm/iommu.h>
+#include <asm/mach_traps.h>
+#include <asm/irqdomain.h>
+#include <asm/realmode.h>
+
+void x86_init_noop(void) { }
+void __init x86_init_uint_noop(unsigned int unused) { }
+static int __init iommu_init_noop(void) { return 0; }
+static void iommu_shutdown_noop(void) { }
+bool __init bool_x86_init_noop(void) { return false; }
+void x86_op_int_noop(int cpu) { }
+static int set_rtc_noop(const struct timespec64 *now) { return -EINVAL; }
+static void get_rtc_noop(struct timespec64 *now) { }
+
+static __initconst const struct of_device_id of_cmos_match[] = {
+ { .compatible = "motorola,mc146818" },
+ {}
+};
+
+/*
+ * Allow devicetree configured systems to disable the RTC by setting the
+ * corresponding DT node's status property to disabled. Code is optimized
+ * out for CONFIG_OF=n builds.
+ */
+static __init void x86_wallclock_init(void)
+{
+ struct device_node *node = of_find_matching_node(NULL, of_cmos_match);
+
+ if (node && !of_device_is_available(node)) {
+ x86_platform.get_wallclock = get_rtc_noop;
+ x86_platform.set_wallclock = set_rtc_noop;
+ }
+}
+
+/*
+ * The platform setup functions are preset with the default functions
+ * for standard PC hardware.
+ */
+struct x86_init_ops x86_init __initdata = {
+
+ .resources = {
+ .probe_roms = probe_roms,
+ .reserve_resources = reserve_standard_io_resources,
+ .memory_setup = e820__memory_setup_default,
+ },
+
+ .mpparse = {
+ .setup_ioapic_ids = x86_init_noop,
+ .find_smp_config = default_find_smp_config,
+ .get_smp_config = default_get_smp_config,
+ },
+
+ .irqs = {
+ .pre_vector_init = init_ISA_irqs,
+ .intr_init = native_init_IRQ,
+ .intr_mode_select = apic_intr_mode_select,
+ .intr_mode_init = apic_intr_mode_init,
+ .create_pci_msi_domain = native_create_pci_msi_domain,
+ },
+
+ .oem = {
+ .arch_setup = x86_init_noop,
+ .banner = default_banner,
+ },
+
+ .paging = {
+ .pagetable_init = native_pagetable_init,
+ },
+
+ .timers = {
+ .setup_percpu_clockev = setup_boot_APIC_clock,
+ .timer_init = hpet_time_init,
+ .wallclock_init = x86_wallclock_init,
+ },
+
+ .iommu = {
+ .iommu_init = iommu_init_noop,
+ },
+
+ .pci = {
+ .init = x86_default_pci_init,
+ .init_irq = x86_default_pci_init_irq,
+ .fixup_irqs = x86_default_pci_fixup_irqs,
+ },
+
+ .hyper = {
+ .init_platform = x86_init_noop,
+ .guest_late_init = x86_init_noop,
+ .x2apic_available = bool_x86_init_noop,
+ .msi_ext_dest_id = bool_x86_init_noop,
+ .init_mem_mapping = x86_init_noop,
+ .init_after_bootmem = x86_init_noop,
+ },
+
+ .acpi = {
+ .set_root_pointer = x86_default_set_root_pointer,
+ .get_root_pointer = x86_default_get_root_pointer,
+ .reduced_hw_early_init = acpi_generic_reduced_hw_init,
+ },
+};
+
+struct x86_cpuinit_ops x86_cpuinit = {
+ .early_percpu_clock_init = x86_init_noop,
+ .setup_percpu_clockev = setup_secondary_APIC_clock,
+};
+
+static void default_nmi_init(void) { };
+
+static bool enc_status_change_prepare_noop(unsigned long vaddr, int npages, bool enc) { return true; }
+static bool enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return false; }
+static bool enc_tlb_flush_required_noop(bool enc) { return false; }
+static bool enc_cache_flush_required_noop(void) { return false; }
+
+struct x86_platform_ops x86_platform __ro_after_init = {
+ .calibrate_cpu = native_calibrate_cpu_early,
+ .calibrate_tsc = native_calibrate_tsc,
+ .get_wallclock = mach_get_cmos_time,
+ .set_wallclock = mach_set_cmos_time,
+ .iommu_shutdown = iommu_shutdown_noop,
+ .is_untracked_pat_range = is_ISA_range,
+ .nmi_init = default_nmi_init,
+ .get_nmi_reason = default_get_nmi_reason,
+ .save_sched_clock_state = tsc_save_sched_clock_state,
+ .restore_sched_clock_state = tsc_restore_sched_clock_state,
+ .realmode_reserve = reserve_real_mode,
+ .realmode_init = init_real_mode,
+ .hyper.pin_vcpu = x86_op_int_noop,
+
+ .guest = {
+ .enc_status_change_prepare = enc_status_change_prepare_noop,
+ .enc_status_change_finish = enc_status_change_finish_noop,
+ .enc_tlb_flush_required = enc_tlb_flush_required_noop,
+ .enc_cache_flush_required = enc_cache_flush_required_noop,
+ },
+};
+
+EXPORT_SYMBOL_GPL(x86_platform);
+
+struct x86_apic_ops x86_apic_ops __ro_after_init = {
+ .io_apic_read = native_io_apic_read,
+ .restore = native_restore_boot_irq_mode,
+};