2 * Copyright (c) 2014 Andrew Turner
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include "opt_kstack_pages.h"
30 #include "opt_platform.h"
33 #include <sys/param.h>
34 #include <sys/systm.h>
41 #include <sys/devmap.h>
44 #include <sys/imgact.h>
46 #include <sys/kernel.h>
48 #include <sys/limits.h>
49 #include <sys/linker.h>
51 #include <sys/msgbuf.h>
53 #include <sys/physmem.h>
55 #include <sys/ptrace.h>
56 #include <sys/reboot.h>
58 #include <sys/rwlock.h>
59 #include <sys/sched.h>
60 #include <sys/signalvar.h>
61 #include <sys/syscallsubr.h>
62 #include <sys/sysent.h>
63 #include <sys/sysproto.h>
64 #include <sys/ucontext.h>
66 #include <sys/vmmeter.h>
69 #include <vm/vm_param.h>
70 #include <vm/vm_kern.h>
71 #include <vm/vm_object.h>
72 #include <vm/vm_page.h>
73 #include <vm/vm_phys.h>
75 #include <vm/vm_map.h>
76 #include <vm/vm_pager.h>
78 #include <machine/armreg.h>
79 #include <machine/cpu.h>
80 #include <machine/debug_monitor.h>
81 #include <machine/hypervisor.h>
82 #include <machine/kdb.h>
83 #include <machine/machdep.h>
84 #include <machine/metadata.h>
85 #include <machine/md_var.h>
86 #include <machine/pcb.h>
87 #include <machine/undefined.h>
88 #include <machine/vmparam.h>
91 #include <machine/vfp.h>
95 #include <contrib/dev/acpica/include/acpi.h>
96 #include <machine/acpica_machdep.h>
100 #include <dev/fdt/fdt_common.h>
101 #include <dev/ofw/openfirm.h>
104 #include <dev/smbios/smbios.h>
106 _Static_assert(sizeof(struct pcb) == 1248, "struct pcb is incorrect size");
107 _Static_assert(offsetof(struct pcb, pcb_fpusaved) == 136,
108 "pcb_fpusaved changed offset");
109 _Static_assert(offsetof(struct pcb, pcb_fpustate) == 192,
110 "pcb_fpustate changed offset");
112 enum arm64_bus arm64_bus_method = ARM64_BUS_NONE;
115 * XXX: The .bss is assumed to be in the boot CPU NUMA domain. If not we
116 * could relocate this, but will need to keep the same virtual address as
117 * it's reverenced by the EARLY_COUNTER macro.
121 #if defined(PERTHREAD_SSP)
123 * The boot SSP canary. Will be replaced with a per-thread canary when
124 * scheduling has started.
126 uintptr_t boot_canary = 0x49a2d892bc05a0b1ul;
129 static struct trapframe proc0_tf;
134 static uint64_t hcr_el2;
136 struct kva_md_info kmi;
138 int64_t dczva_line_size; /* The size of cache line the dc zva zeroes */
142 * Physical address of the EFI System Table. Stashed from the metadata hints
143 * passed into the kernel and used by the EFI code to call runtime services.
145 vm_paddr_t efi_systbl_phys;
146 static struct efi_map_header *efihdr;
148 /* pagezero_* implementations are provided in support.S */
149 void pagezero_simple(void *);
150 void pagezero_cache(void *);
152 /* pagezero_simple is default pagezero */
153 void (*pagezero)(void *p) = pagezero_simple;
155 int (*apei_nmi)(void);
157 #if defined(PERTHREAD_SSP_WARNING)
159 print_ssp_warning(void *data __unused)
161 printf("WARNING: Per-thread SSP is enabled but the compiler is too old to support it\n");
163 SYSINIT(ssp_warn, SI_SUB_COPYRIGHT, SI_ORDER_ANY, print_ssp_warning, NULL);
164 SYSINIT(ssp_warn2, SI_SUB_LAST, SI_ORDER_ANY, print_ssp_warning, NULL);
170 uint64_t id_aa64mfr1;
172 id_aa64mfr1 = READ_SPECIALREG(id_aa64mmfr1_el1);
173 if (ID_AA64MMFR1_PAN_VAL(id_aa64mfr1) != ID_AA64MMFR1_PAN_NONE)
182 * The LLVM integrated assembler doesn't understand the PAN
183 * PSTATE field. Because of this we need to manually create
184 * the instruction in an asm block. This is equivalent to:
187 * This sets the PAN bit, stopping the kernel from accessing
188 * memory when userspace can also access it unless the kernel
189 * uses the userspace load/store instructions.
192 WRITE_SPECIALREG(sctlr_el1,
193 READ_SPECIALREG(sctlr_el1) & ~SCTLR_SPAN);
194 __asm __volatile(".inst 0xd500409f | (0x1 << 8)");
203 * XXX The E2H check is wrong, but it's close enough for now. Needs to
204 * be re-evaluated once we're running regularly in EL2.
206 return (boot_el == 2 && (hcr_el2 & HCR_E2H) == 0);
210 cpu_startup(void *dummy)
215 printf("real memory = %ju (%ju MB)\n", ptoa((uintmax_t)realmem),
216 ptoa((uintmax_t)realmem) / 1024 / 1024);
219 printf("Physical memory chunk(s):\n");
220 for (i = 0; phys_avail[i + 1] != 0; i += 2) {
221 size = phys_avail[i + 1] - phys_avail[i];
222 printf("%#016jx - %#016jx, %ju bytes (%ju pages)\n",
223 (uintmax_t)phys_avail[i],
224 (uintmax_t)phys_avail[i + 1] - 1,
225 (uintmax_t)size, (uintmax_t)size / PAGE_SIZE);
229 printf("avail memory = %ju (%ju MB)\n",
230 ptoa((uintmax_t)vm_free_count()),
231 ptoa((uintmax_t)vm_free_count()) / 1024 / 1024);
234 install_cpu_errata();
236 vm_ksubmap_init(&kmi);
238 vm_pager_bufferinit();
241 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
244 late_ifunc_resolve(void *dummy __unused)
246 link_elf_late_ireloc();
248 SYSINIT(late_ifunc_resolve, SI_SUB_CPU, SI_ORDER_ANY, late_ifunc_resolve, NULL);
251 cpu_idle_wakeup(int cpu)
264 if (!sched_runnable())
277 /* We should have shutdown by now, if not enter a low power sleep */
280 __asm __volatile("wfi");
285 * Flush the D-cache for non-DMA I/O so that the I-cache can
286 * be made coherent later.
289 cpu_flush_dcache(void *ptr, size_t len)
295 /* Get current clock frequency for the given CPU ID. */
297 cpu_est_clockrate(int cpu_id, uint64_t *rate)
301 pc = pcpu_find(cpu_id);
302 if (pc == NULL || rate == NULL)
305 if (pc->pc_clock == 0)
308 *rate = pc->pc_clock;
313 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
316 pcpu->pc_acpi_id = 0xffffffff;
317 pcpu->pc_mpidr = UINT64_MAX;
327 if (td->td_md.md_spinlock_count == 0) {
328 daif = intr_disable();
329 td->td_md.md_spinlock_count = 1;
330 td->td_md.md_saved_daif = daif;
333 td->td_md.md_spinlock_count++;
343 daif = td->td_md.md_saved_daif;
344 td->td_md.md_spinlock_count--;
345 if (td->td_md.md_spinlock_count == 0) {
352 * Construct a PCB from a trapframe. This is called from kdb_trap() where
353 * we want to start a backtrace from the function that caused us to enter
354 * the debugger. We have the context in the trapframe, but base the trace
355 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
356 * enough for a backtrace.
359 makectx(struct trapframe *tf, struct pcb *pcb)
363 /* NB: pcb_x[PCB_LR] is the PC, see PC_REGS() in db_machdep.h */
364 for (i = 0; i < nitems(pcb->pcb_x); i++) {
366 pcb->pcb_x[i] = tf->tf_elr;
368 pcb->pcb_x[i] = tf->tf_x[i + PCB_X_START];
371 pcb->pcb_sp = tf->tf_sp;
375 init_proc0(vm_offset_t kstack)
379 pcpup = cpuid_to_pcpu[0];
380 MPASS(pcpup != NULL);
382 proc_linkup0(&proc0, &thread0);
383 thread0.td_kstack = kstack;
384 thread0.td_kstack_pages = KSTACK_PAGES;
385 #if defined(PERTHREAD_SSP)
386 thread0.td_md.md_canary = boot_canary;
388 thread0.td_pcb = (struct pcb *)(thread0.td_kstack +
389 thread0.td_kstack_pages * PAGE_SIZE) - 1;
390 thread0.td_pcb->pcb_flags = 0;
391 thread0.td_pcb->pcb_fpflags = 0;
392 thread0.td_pcb->pcb_fpusaved = &thread0.td_pcb->pcb_fpustate;
393 thread0.td_pcb->pcb_vfpcpu = UINT_MAX;
394 thread0.td_frame = &proc0_tf;
395 ptrauth_thread0(&thread0);
396 pcpup->pc_curpcb = thread0.td_pcb;
399 * Unmask SError exceptions. They are used to signal a RAS failure,
400 * or other hardware error.
406 * Get an address to be used to write to kernel data that may be mapped
407 * read-only, e.g. to patch kernel code.
410 arm64_get_writable_addr(vm_offset_t addr, vm_offset_t *out)
414 /* Check if the page is writable */
415 if (PAR_SUCCESS(arm64_address_translate_s1e1w(addr))) {
421 * Find the physical address of the given page.
423 if (!pmap_klookup(addr, &pa)) {
428 * If it is within the DMAP region and is writable use that.
430 if (PHYS_IN_DMAP(pa)) {
431 addr = PHYS_TO_DMAP(pa);
432 if (PAR_SUCCESS(arm64_address_translate_s1e1w(addr))) {
441 typedef void (*efi_map_entry_cb)(struct efi_md *, void *argp);
444 foreach_efi_map_entry(struct efi_map_header *efihdr, efi_map_entry_cb cb, void *argp)
446 struct efi_md *map, *p;
451 * Memory map data provided by UEFI via the GetMemoryMap
454 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
455 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
457 if (efihdr->descriptor_size == 0)
459 ndesc = efihdr->memory_size / efihdr->descriptor_size;
461 for (i = 0, p = map; i < ndesc; i++,
462 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
468 * Handle the EFI memory map list.
470 * We will make two passes at this, the first (exclude == false) to populate
471 * physmem with valid physical memory ranges from recognized map entry types.
472 * In the second pass we will exclude memory ranges from physmem which must not
473 * be used for general allocations, either because they are used by runtime
474 * firmware or otherwise reserved.
476 * Adding the runtime-reserved memory ranges to physmem and excluding them
477 * later ensures that they are included in the DMAP, but excluded from
480 * Entry types not explicitly listed here are ignored and not mapped.
483 handle_efi_map_entry(struct efi_md *p, void *argp)
485 bool exclude = *(bool *)argp;
487 switch (p->md_type) {
488 case EFI_MD_TYPE_RECLAIM:
490 * The recomended location for ACPI tables. Map into the
491 * DMAP so we can access them from userspace via /dev/mem.
493 case EFI_MD_TYPE_RT_CODE:
495 * Some UEFI implementations put the system table in the
496 * runtime code section. Include it in the DMAP, but will
497 * be excluded from phys_avail.
499 case EFI_MD_TYPE_RT_DATA:
501 * Runtime data will be excluded after the DMAP
502 * region is created to stop it from being added
506 physmem_exclude_region(p->md_phys,
507 p->md_pages * EFI_PAGE_SIZE, EXFLAG_NOALLOC);
511 case EFI_MD_TYPE_CODE:
512 case EFI_MD_TYPE_DATA:
513 case EFI_MD_TYPE_BS_CODE:
514 case EFI_MD_TYPE_BS_DATA:
515 case EFI_MD_TYPE_FREE:
517 * We're allowed to use any entry with these types.
520 physmem_hardware_region(p->md_phys,
521 p->md_pages * EFI_PAGE_SIZE);
524 /* Other types shall not be handled by physmem. */
530 add_efi_map_entries(struct efi_map_header *efihdr)
532 bool exclude = false;
533 foreach_efi_map_entry(efihdr, handle_efi_map_entry, &exclude);
537 exclude_efi_map_entries(struct efi_map_header *efihdr)
540 foreach_efi_map_entry(efihdr, handle_efi_map_entry, &exclude);
544 print_efi_map_entry(struct efi_md *p, void *argp __unused)
547 static const char *types[] = {
553 "RuntimeServicesCode",
554 "RuntimeServicesData",
555 "ConventionalMemory",
560 "MemoryMappedIOPortSpace",
565 if (p->md_type < nitems(types))
566 type = types[p->md_type];
569 printf("%23s %012lx %012lx %08lx ", type, p->md_phys,
570 p->md_virt, p->md_pages);
571 if (p->md_attr & EFI_MD_ATTR_UC)
573 if (p->md_attr & EFI_MD_ATTR_WC)
575 if (p->md_attr & EFI_MD_ATTR_WT)
577 if (p->md_attr & EFI_MD_ATTR_WB)
579 if (p->md_attr & EFI_MD_ATTR_UCE)
581 if (p->md_attr & EFI_MD_ATTR_WP)
583 if (p->md_attr & EFI_MD_ATTR_RP)
585 if (p->md_attr & EFI_MD_ATTR_XP)
587 if (p->md_attr & EFI_MD_ATTR_NV)
589 if (p->md_attr & EFI_MD_ATTR_MORE_RELIABLE)
590 printf("MORE_RELIABLE ");
591 if (p->md_attr & EFI_MD_ATTR_RO)
593 if (p->md_attr & EFI_MD_ATTR_RT)
599 print_efi_map_entries(struct efi_map_header *efihdr)
602 printf("%23s %12s %12s %8s %4s\n",
603 "Type", "Physical", "Virtual", "#Pages", "Attr");
604 foreach_efi_map_entry(efihdr, print_efi_map_entry, NULL);
608 * Map the passed in VA in EFI space to a void * using the efi memory table to
609 * find the PA and return it in the DMAP, if it exists. We're used between the
610 * calls to pmap_bootstrap() and physmem_init_kernel_globals() to parse CFG
611 * tables We assume that either the entry you are mapping fits within its page,
612 * or if it spills to the next page, that's contiguous in PA and in the DMAP.
613 * All observed tables obey the first part of this precondition.
615 struct early_map_data
622 efi_early_map_entry(struct efi_md *p, void *argp)
624 struct early_map_data *emdp = argp;
629 if ((p->md_attr & EFI_MD_ATTR_RT) == 0)
632 e = p->md_virt + p->md_pages * EFI_PAGE_SIZE;
633 if (emdp->va < s || emdp->va >= e)
635 emdp->pa = p->md_phys + (emdp->va - p->md_virt);
639 efi_early_map(vm_offset_t va)
641 struct early_map_data emd = { .va = va };
643 foreach_efi_map_entry(efihdr, efi_early_map_entry, &emd);
646 return (void *)PHYS_TO_DMAP(emd.pa);
651 * When booted via kboot, the prior kernel will pass in reserved memory areas in
652 * a EFI config table. We need to find that table and walk through it excluding
653 * the memory ranges in it. btw, this is called too early for the printf to do
654 * anything since msgbufp isn't initialized, let alone a console...
657 exclude_efi_memreserve(vm_offset_t efi_systbl_phys)
659 struct efi_systbl *systbl;
660 struct uuid efi_memreserve = LINUX_EFI_MEMRESERVE_TABLE;
662 systbl = (struct efi_systbl *)PHYS_TO_DMAP(efi_systbl_phys);
663 if (systbl == NULL) {
664 printf("can't map systbl\n");
667 if (systbl->st_hdr.th_sig != EFI_SYSTBL_SIG) {
668 printf("Bad signature for systbl %#lx\n", systbl->st_hdr.th_sig);
673 * We don't yet have the pmap system booted enough to create a pmap for
674 * the efi firmware's preferred address space from the GetMemoryMap()
675 * table. The st_cfgtbl is a VA in this space, so we need to do the
676 * mapping ourselves to a kernel VA with efi_early_map. We assume that
677 * the cfgtbl entries don't span a page. Other pointers are PAs, as
680 if (systbl->st_cfgtbl == 0) /* Failsafe st_entries should == 0 in this case */
682 for (int i = 0; i < systbl->st_entries; i++) {
683 struct efi_cfgtbl *cfgtbl;
684 struct linux_efi_memreserve *mr;
686 cfgtbl = efi_early_map(systbl->st_cfgtbl + i * sizeof(*cfgtbl));
688 panic("Can't map the config table entry %d\n", i);
689 if (memcmp(&cfgtbl->ct_uuid, &efi_memreserve, sizeof(struct uuid)) != 0)
693 * cfgtbl points are either VA or PA, depending on the GUID of
694 * the table. memreserve GUID pointers are PA and not converted
695 * after a SetVirtualAddressMap(). The list's mr_next pointer
698 mr = (struct linux_efi_memreserve *)PHYS_TO_DMAP(
699 (vm_offset_t)cfgtbl->ct_data);
701 for (int j = 0; j < mr->mr_count; j++) {
702 struct linux_efi_memreserve_entry *mre;
704 mre = &mr->mr_entry[j];
705 physmem_exclude_region(mre->mre_base, mre->mre_size,
706 EXFLAG_NODUMP | EXFLAG_NOALLOC);
708 if (mr->mr_next == 0)
710 mr = (struct linux_efi_memreserve *)PHYS_TO_DMAP(mr->mr_next);
718 try_load_dtb(caddr_t kmdp)
722 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
723 #if defined(FDT_DTB_STATIC)
725 * In case the device tree blob was not retrieved (from metadata) try
726 * to use the statically embedded one.
729 dtbp = (vm_offset_t)&fdt_static_dtb;
732 if (dtbp == (vm_offset_t)NULL) {
734 printf("ERROR loading DTB\n");
739 if (OF_install(OFW_FDT, 0) == FALSE)
740 panic("Cannot install FDT");
742 if (OF_init((void *)dtbp) != 0)
743 panic("OF_init failed with the found device tree");
745 parse_fdt_bootargs();
752 bool has_acpi, has_fdt;
755 has_acpi = has_fdt = false;
758 has_fdt = (OF_peer(0) != 0);
761 has_acpi = (AcpiOsGetRootPointer() != 0);
764 env = kern_getenv("kern.cfg.order");
767 while (order != NULL) {
769 strncmp(order, "acpi", 4) == 0 &&
770 (order[4] == ',' || order[4] == '\0')) {
771 arm64_bus_method = ARM64_BUS_ACPI;
775 strncmp(order, "fdt", 3) == 0 &&
776 (order[3] == ',' || order[3] == '\0')) {
777 arm64_bus_method = ARM64_BUS_FDT;
780 order = strchr(order, ',');
782 order++; /* Skip comma */
786 /* If we set the bus method it is valid */
787 if (arm64_bus_method != ARM64_BUS_NONE)
790 /* If no order or an invalid order was set use the default */
791 if (arm64_bus_method == ARM64_BUS_NONE) {
793 arm64_bus_method = ARM64_BUS_FDT;
795 arm64_bus_method = ARM64_BUS_ACPI;
799 * If no option was set the default is valid, otherwise we are
800 * setting one to get cninit() working, then calling panic to tell
801 * the user about the invalid bus setup.
803 return (env == NULL);
809 int dczva_line_shift;
812 identify_cache(READ_SPECIALREG(ctr_el0));
814 dczid_el0 = READ_SPECIALREG(dczid_el0);
816 /* Check if dc zva is not prohibited */
817 if (dczid_el0 & DCZID_DZP)
820 /* Same as with above calculations */
821 dczva_line_shift = DCZID_BS_SIZE(dczid_el0);
822 dczva_line_size = sizeof(int) << dczva_line_shift;
824 /* Change pagezero function */
825 pagezero = pagezero_cache;
830 memory_mapping_mode(vm_paddr_t pa)
832 struct efi_md *map, *p;
837 return (VM_MEMATTR_WRITE_BACK);
840 * Memory map data provided by UEFI via the GetMemoryMap
843 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
844 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
846 if (efihdr->descriptor_size == 0)
847 return (VM_MEMATTR_WRITE_BACK);
848 ndesc = efihdr->memory_size / efihdr->descriptor_size;
850 for (i = 0, p = map; i < ndesc; i++,
851 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
852 if (pa < p->md_phys ||
853 pa >= p->md_phys + p->md_pages * EFI_PAGE_SIZE)
855 if (p->md_type == EFI_MD_TYPE_IOMEM ||
856 p->md_type == EFI_MD_TYPE_IOPORT)
857 return (VM_MEMATTR_DEVICE);
858 else if ((p->md_attr & EFI_MD_ATTR_WB) != 0 ||
859 p->md_type == EFI_MD_TYPE_RECLAIM)
860 return (VM_MEMATTR_WRITE_BACK);
861 else if ((p->md_attr & EFI_MD_ATTR_WT) != 0)
862 return (VM_MEMATTR_WRITE_THROUGH);
863 else if ((p->md_attr & EFI_MD_ATTR_WC) != 0)
864 return (VM_MEMATTR_WRITE_COMBINING);
868 return (VM_MEMATTR_DEVICE);
872 initarm(struct arm64_bootparams *abp)
874 struct efi_fb *efifb;
878 struct mem_region mem_regions[FDT_MEM_REGIONS];
881 char dts_version[255];
883 vm_offset_t lastaddr;
887 TSRAW(&thread0, TS_ENTER, __func__, NULL);
889 boot_el = abp->boot_el;
890 hcr_el2 = abp->hcr_el2;
892 /* Parse loader or FDT boot parametes. Determine last used address. */
893 lastaddr = parse_boot_param(abp);
895 /* Find the kernel address */
896 kmdp = preload_search_by_type("elf kernel");
898 kmdp = preload_search_by_type("elf64 kernel");
901 identify_hypervisor_smbios();
903 update_special_regs(0);
905 link_elf_ireloc(kmdp);
910 efi_systbl_phys = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t);
912 /* Load the physical memory ranges */
913 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
914 MODINFO_METADATA | MODINFOMD_EFI_MAP);
916 add_efi_map_entries(efihdr);
919 /* Grab physical memory regions information from device tree. */
920 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,
922 panic("Cannot get physical memory regions");
923 physmem_hardware_regions(mem_regions, mem_regions_sz);
925 if (fdt_get_reserved_mem(mem_regions, &mem_regions_sz) == 0)
926 physmem_exclude_regions(mem_regions, mem_regions_sz,
927 EXFLAG_NODUMP | EXFLAG_NOALLOC);
930 /* Exclude the EFI framebuffer from our view of physical memory. */
931 efifb = (struct efi_fb *)preload_search_info(kmdp,
932 MODINFO_METADATA | MODINFOMD_EFI_FB);
934 physmem_exclude_region(efifb->fb_addr, efifb->fb_size,
937 /* Set the pcpu data, this is needed by pmap_bootstrap */
939 pcpu_init(pcpup, 0, sizeof(struct pcpu));
942 * Set the pcpu pointer with a backup in tpidr_el1 to be
943 * loaded when entering the kernel from userland.
947 "msr tpidr_el1, %0" :: "r"(pcpup));
949 /* locore.S sets sp_el0 to &thread0 so no need to set it here. */
950 PCPU_SET(curthread, &thread0);
951 PCPU_SET(midr, get_midr());
953 /* Do basic tuning, hz etc */
959 /* Bootstrap enough of pmap to enter the kernel proper */
960 pmap_bootstrap(lastaddr - KERNBASE);
961 /* Exclude entries needed in the DMAP region, but not phys_avail */
963 exclude_efi_map_entries(efihdr);
964 /* Do the same for reserve entries in the EFI MEMRESERVE table */
965 if (efi_systbl_phys != 0)
966 exclude_efi_memreserve(efi_systbl_phys);
969 * We carefully bootstrap the sanitizer map after we've excluded
970 * absolutely everything else that could impact phys_avail. There's not
971 * always enough room for the initial shadow map after the kernel, so
972 * we'll end up searching for segments that we can safely use. Those
973 * segments also get excluded from phys_avail.
975 #if defined(KASAN) || defined(KMSAN)
976 pmap_bootstrap_san();
979 physmem_init_kernel_globals();
981 devmap_bootstrap(0, NULL);
986 set_ttbr0(abp->kern_ttbr0);
990 panic("Invalid bus configuration: %s",
991 kern_getenv("kern.cfg.order"));
994 * Check if pointer authentication is available on this system, and
995 * if so enable its use. This needs to be called before init_proc0
996 * as that will configure the thread0 pointer authentication keys.
1001 * Dump the boot metadata. We have to wait for cninit() since console
1002 * output is required. If it's grossly incorrect the kernel will never
1005 if (getenv_is_true("debug.dump_modinfo_at_boot"))
1008 init_proc0(abp->kern_stack);
1009 msgbufinit(msgbufp, msgbufsize);
1011 init_param2(physmem);
1016 if ((boothowto & RB_KDB) != 0)
1017 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
1025 env = kern_getenv("kernelname");
1027 strlcpy(kernelname, env, sizeof(kernelname));
1030 if (arm64_bus_method == ARM64_BUS_FDT) {
1031 root = OF_finddevice("/");
1032 if (OF_getprop(root, "freebsd,dts-version", dts_version, sizeof(dts_version)) > 0) {
1033 if (strcmp(LINUX_DTS_VERSION, dts_version) != 0)
1034 printf("WARNING: DTB version is %s while kernel expects %s, "
1035 "please update the DTB in the ESP\n",
1039 printf("WARNING: Cannot find freebsd,dts-version property, "
1040 "cannot check DTB compliance\n");
1045 if (boothowto & RB_VERBOSE) {
1047 print_efi_map_entries(efihdr);
1048 physmem_print_tables();
1053 if (bootverbose && kstack_pages != KSTACK_PAGES)
1054 printf("kern.kstack_pages = %d ignored for thread0\n",
1065 WRITE_SPECIALREG(oslar_el1, 0);
1067 /* This permits DDB to use debug registers for watchpoints. */
1070 /* TODO: Eventually will need to initialize debug registers here. */
1074 #include <ddb/ddb.h>
1076 DB_SHOW_COMMAND(specialregs, db_show_spregs)
1078 #define PRINT_REG(reg) \
1079 db_printf(__STRING(reg) " = %#016lx\n", READ_SPECIALREG(reg))
1081 PRINT_REG(actlr_el1);
1082 PRINT_REG(afsr0_el1);
1083 PRINT_REG(afsr1_el1);
1084 PRINT_REG(aidr_el1);
1085 PRINT_REG(amair_el1);
1086 PRINT_REG(ccsidr_el1);
1087 PRINT_REG(clidr_el1);
1088 PRINT_REG(contextidr_el1);
1089 PRINT_REG(cpacr_el1);
1090 PRINT_REG(csselr_el1);
1092 PRINT_REG(currentel);
1094 PRINT_REG(dczid_el0);
1099 /* ARM64TODO: Enable VFP before reading floating-point registers */
1103 PRINT_REG(id_aa64afr0_el1);
1104 PRINT_REG(id_aa64afr1_el1);
1105 PRINT_REG(id_aa64dfr0_el1);
1106 PRINT_REG(id_aa64dfr1_el1);
1107 PRINT_REG(id_aa64isar0_el1);
1108 PRINT_REG(id_aa64isar1_el1);
1109 PRINT_REG(id_aa64pfr0_el1);
1110 PRINT_REG(id_aa64pfr1_el1);
1111 PRINT_REG(id_afr0_el1);
1112 PRINT_REG(id_dfr0_el1);
1113 PRINT_REG(id_isar0_el1);
1114 PRINT_REG(id_isar1_el1);
1115 PRINT_REG(id_isar2_el1);
1116 PRINT_REG(id_isar3_el1);
1117 PRINT_REG(id_isar4_el1);
1118 PRINT_REG(id_isar5_el1);
1119 PRINT_REG(id_mmfr0_el1);
1120 PRINT_REG(id_mmfr1_el1);
1121 PRINT_REG(id_mmfr2_el1);
1122 PRINT_REG(id_mmfr3_el1);
1124 /* Missing from llvm */
1125 PRINT_REG(id_mmfr4_el1);
1127 PRINT_REG(id_pfr0_el1);
1128 PRINT_REG(id_pfr1_el1);
1130 PRINT_REG(mair_el1);
1131 PRINT_REG(midr_el1);
1132 PRINT_REG(mpidr_el1);
1133 PRINT_REG(mvfr0_el1);
1134 PRINT_REG(mvfr1_el1);
1135 PRINT_REG(mvfr2_el1);
1136 PRINT_REG(revidr_el1);
1137 PRINT_REG(sctlr_el1);
1140 PRINT_REG(spsr_el1);
1142 PRINT_REG(tpidr_el0);
1143 PRINT_REG(tpidr_el1);
1144 PRINT_REG(tpidrro_el0);
1145 PRINT_REG(ttbr0_el1);
1146 PRINT_REG(ttbr1_el1);
1147 PRINT_REG(vbar_el1);
1151 DB_SHOW_COMMAND(vtop, db_show_vtop)
1156 phys = arm64_address_translate_s1e1r(addr);
1157 db_printf("EL1 physical address reg (read): 0x%016lx\n", phys);
1158 phys = arm64_address_translate_s1e1w(addr);
1159 db_printf("EL1 physical address reg (write): 0x%016lx\n", phys);
1160 phys = arm64_address_translate_s1e0r(addr);
1161 db_printf("EL0 physical address reg (read): 0x%016lx\n", phys);
1162 phys = arm64_address_translate_s1e0w(addr);
1163 db_printf("EL0 physical address reg (write): 0x%016lx\n", phys);
1165 db_printf("show vtop <virt_addr>\n");