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>
50 #include <sys/msgbuf.h>
52 #include <sys/physmem.h>
54 #include <sys/ptrace.h>
55 #include <sys/reboot.h>
57 #include <sys/rwlock.h>
58 #include <sys/sched.h>
59 #include <sys/signalvar.h>
60 #include <sys/syscallsubr.h>
61 #include <sys/sysent.h>
62 #include <sys/sysproto.h>
63 #include <sys/ucontext.h>
65 #include <sys/vmmeter.h>
68 #include <vm/vm_param.h>
69 #include <vm/vm_kern.h>
70 #include <vm/vm_object.h>
71 #include <vm/vm_page.h>
72 #include <vm/vm_phys.h>
74 #include <vm/vm_map.h>
75 #include <vm/vm_pager.h>
77 #include <machine/armreg.h>
78 #include <machine/cpu.h>
79 #include <machine/debug_monitor.h>
80 #include <machine/hypervisor.h>
81 #include <machine/kdb.h>
82 #include <machine/machdep.h>
83 #include <machine/metadata.h>
84 #include <machine/md_var.h>
85 #include <machine/pcb.h>
86 #include <machine/undefined.h>
87 #include <machine/vmparam.h>
90 #include <machine/vfp.h>
94 #include <contrib/dev/acpica/include/acpi.h>
95 #include <machine/acpica_machdep.h>
99 #include <dev/fdt/fdt_common.h>
100 #include <dev/ofw/openfirm.h>
103 #include <dev/smbios/smbios.h>
105 _Static_assert(sizeof(struct pcb) == 1248, "struct pcb is incorrect size");
106 _Static_assert(offsetof(struct pcb, pcb_fpusaved) == 136,
107 "pcb_fpusaved changed offset");
108 _Static_assert(offsetof(struct pcb, pcb_fpustate) == 192,
109 "pcb_fpustate changed offset");
111 enum arm64_bus arm64_bus_method = ARM64_BUS_NONE;
114 * XXX: The .bss is assumed to be in the boot CPU NUMA domain. If not we
115 * could relocate this, but will need to keep the same virtual address as
116 * it's reverenced by the EARLY_COUNTER macro.
120 #if defined(PERTHREAD_SSP)
122 * The boot SSP canary. Will be replaced with a per-thread canary when
123 * scheduling has started.
125 uintptr_t boot_canary = 0x49a2d892bc05a0b1ul;
128 static struct trapframe proc0_tf;
133 static uint64_t hcr_el2;
135 struct kva_md_info kmi;
137 int64_t dczva_line_size; /* The size of cache line the dc zva zeroes */
141 * Physical address of the EFI System Table. Stashed from the metadata hints
142 * passed into the kernel and used by the EFI code to call runtime services.
144 vm_paddr_t efi_systbl_phys;
145 static struct efi_map_header *efihdr;
147 /* pagezero_* implementations are provided in support.S */
148 void pagezero_simple(void *);
149 void pagezero_cache(void *);
151 /* pagezero_simple is default pagezero */
152 void (*pagezero)(void *p) = pagezero_simple;
154 int (*apei_nmi)(void);
156 #if defined(PERTHREAD_SSP_WARNING)
158 print_ssp_warning(void *data __unused)
160 printf("WARNING: Per-thread SSP is enabled but the compiler is too old to support it\n");
162 SYSINIT(ssp_warn, SI_SUB_COPYRIGHT, SI_ORDER_ANY, print_ssp_warning, NULL);
163 SYSINIT(ssp_warn2, SI_SUB_LAST, SI_ORDER_ANY, print_ssp_warning, NULL);
169 uint64_t id_aa64mfr1;
171 id_aa64mfr1 = READ_SPECIALREG(id_aa64mmfr1_el1);
172 if (ID_AA64MMFR1_PAN_VAL(id_aa64mfr1) != ID_AA64MMFR1_PAN_NONE)
181 * The LLVM integrated assembler doesn't understand the PAN
182 * PSTATE field. Because of this we need to manually create
183 * the instruction in an asm block. This is equivalent to:
186 * This sets the PAN bit, stopping the kernel from accessing
187 * memory when userspace can also access it unless the kernel
188 * uses the userspace load/store instructions.
191 WRITE_SPECIALREG(sctlr_el1,
192 READ_SPECIALREG(sctlr_el1) & ~SCTLR_SPAN);
193 __asm __volatile(".inst 0xd500409f | (0x1 << 8)");
202 * XXX The E2H check is wrong, but it's close enough for now. Needs to
203 * be re-evaluated once we're running regularly in EL2.
205 return (boot_el == 2 && (hcr_el2 & HCR_E2H) == 0);
209 cpu_startup(void *dummy)
214 printf("real memory = %ju (%ju MB)\n", ptoa((uintmax_t)realmem),
215 ptoa((uintmax_t)realmem) / 1024 / 1024);
218 printf("Physical memory chunk(s):\n");
219 for (i = 0; phys_avail[i + 1] != 0; i += 2) {
220 size = phys_avail[i + 1] - phys_avail[i];
221 printf("%#016jx - %#016jx, %ju bytes (%ju pages)\n",
222 (uintmax_t)phys_avail[i],
223 (uintmax_t)phys_avail[i + 1] - 1,
224 (uintmax_t)size, (uintmax_t)size / PAGE_SIZE);
228 printf("avail memory = %ju (%ju MB)\n",
229 ptoa((uintmax_t)vm_free_count()),
230 ptoa((uintmax_t)vm_free_count()) / 1024 / 1024);
233 install_cpu_errata();
235 vm_ksubmap_init(&kmi);
237 vm_pager_bufferinit();
240 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
243 late_ifunc_resolve(void *dummy __unused)
245 link_elf_late_ireloc();
247 SYSINIT(late_ifunc_resolve, SI_SUB_CPU, SI_ORDER_ANY, late_ifunc_resolve, NULL);
250 cpu_idle_wakeup(int cpu)
263 if (!sched_runnable())
276 /* We should have shutdown by now, if not enter a low power sleep */
279 __asm __volatile("wfi");
284 * Flush the D-cache for non-DMA I/O so that the I-cache can
285 * be made coherent later.
288 cpu_flush_dcache(void *ptr, size_t len)
294 /* Get current clock frequency for the given CPU ID. */
296 cpu_est_clockrate(int cpu_id, uint64_t *rate)
300 pc = pcpu_find(cpu_id);
301 if (pc == NULL || rate == NULL)
304 if (pc->pc_clock == 0)
307 *rate = pc->pc_clock;
312 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
315 pcpu->pc_acpi_id = 0xffffffff;
316 pcpu->pc_mpidr = UINT64_MAX;
326 if (td->td_md.md_spinlock_count == 0) {
327 daif = intr_disable();
328 td->td_md.md_spinlock_count = 1;
329 td->td_md.md_saved_daif = daif;
332 td->td_md.md_spinlock_count++;
342 daif = td->td_md.md_saved_daif;
343 td->td_md.md_spinlock_count--;
344 if (td->td_md.md_spinlock_count == 0) {
351 * Construct a PCB from a trapframe. This is called from kdb_trap() where
352 * we want to start a backtrace from the function that caused us to enter
353 * the debugger. We have the context in the trapframe, but base the trace
354 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
355 * enough for a backtrace.
358 makectx(struct trapframe *tf, struct pcb *pcb)
362 /* NB: pcb_x[PCB_LR] is the PC, see PC_REGS() in db_machdep.h */
363 for (i = 0; i < nitems(pcb->pcb_x); i++) {
365 pcb->pcb_x[i] = tf->tf_elr;
367 pcb->pcb_x[i] = tf->tf_x[i + PCB_X_START];
370 pcb->pcb_sp = tf->tf_sp;
374 init_proc0(vm_offset_t kstack)
378 pcpup = cpuid_to_pcpu[0];
379 MPASS(pcpup != NULL);
381 proc_linkup0(&proc0, &thread0);
382 thread0.td_kstack = kstack;
383 thread0.td_kstack_pages = KSTACK_PAGES;
384 #if defined(PERTHREAD_SSP)
385 thread0.td_md.md_canary = boot_canary;
387 thread0.td_pcb = (struct pcb *)(thread0.td_kstack +
388 thread0.td_kstack_pages * PAGE_SIZE) - 1;
389 thread0.td_pcb->pcb_flags = 0;
390 thread0.td_pcb->pcb_fpflags = 0;
391 thread0.td_pcb->pcb_fpusaved = &thread0.td_pcb->pcb_fpustate;
392 thread0.td_pcb->pcb_vfpcpu = UINT_MAX;
393 thread0.td_frame = &proc0_tf;
394 ptrauth_thread0(&thread0);
395 pcpup->pc_curpcb = thread0.td_pcb;
398 * Unmask SError exceptions. They are used to signal a RAS failure,
399 * or other hardware error.
405 * Get an address to be used to write to kernel data that may be mapped
406 * read-only, e.g. to patch kernel code.
409 arm64_get_writable_addr(vm_offset_t addr, vm_offset_t *out)
413 /* Check if the page is writable */
414 if (PAR_SUCCESS(arm64_address_translate_s1e1w(addr))) {
420 * Find the physical address of the given page.
422 if (!pmap_klookup(addr, &pa)) {
427 * If it is within the DMAP region and is writable use that.
429 if (PHYS_IN_DMAP(pa)) {
430 addr = PHYS_TO_DMAP(pa);
431 if (PAR_SUCCESS(arm64_address_translate_s1e1w(addr))) {
440 typedef void (*efi_map_entry_cb)(struct efi_md *, void *argp);
443 foreach_efi_map_entry(struct efi_map_header *efihdr, efi_map_entry_cb cb, void *argp)
445 struct efi_md *map, *p;
450 * Memory map data provided by UEFI via the GetMemoryMap
453 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
454 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
456 if (efihdr->descriptor_size == 0)
458 ndesc = efihdr->memory_size / efihdr->descriptor_size;
460 for (i = 0, p = map; i < ndesc; i++,
461 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
467 * Handle the EFI memory map list.
469 * We will make two passes at this, the first (exclude == false) to populate
470 * physmem with valid physical memory ranges from recognized map entry types.
471 * In the second pass we will exclude memory ranges from physmem which must not
472 * be used for general allocations, either because they are used by runtime
473 * firmware or otherwise reserved.
475 * Adding the runtime-reserved memory ranges to physmem and excluding them
476 * later ensures that they are included in the DMAP, but excluded from
479 * Entry types not explicitly listed here are ignored and not mapped.
482 handle_efi_map_entry(struct efi_md *p, void *argp)
484 bool exclude = *(bool *)argp;
486 switch (p->md_type) {
487 case EFI_MD_TYPE_RECLAIM:
489 * The recomended location for ACPI tables. Map into the
490 * DMAP so we can access them from userspace via /dev/mem.
492 case EFI_MD_TYPE_RT_CODE:
494 * Some UEFI implementations put the system table in the
495 * runtime code section. Include it in the DMAP, but will
496 * be excluded from phys_avail.
498 case EFI_MD_TYPE_RT_DATA:
500 * Runtime data will be excluded after the DMAP
501 * region is created to stop it from being added
505 physmem_exclude_region(p->md_phys,
506 p->md_pages * EFI_PAGE_SIZE, EXFLAG_NOALLOC);
510 case EFI_MD_TYPE_CODE:
511 case EFI_MD_TYPE_DATA:
512 case EFI_MD_TYPE_BS_CODE:
513 case EFI_MD_TYPE_BS_DATA:
514 case EFI_MD_TYPE_FREE:
516 * We're allowed to use any entry with these types.
519 physmem_hardware_region(p->md_phys,
520 p->md_pages * EFI_PAGE_SIZE);
523 /* Other types shall not be handled by physmem. */
529 add_efi_map_entries(struct efi_map_header *efihdr)
531 bool exclude = false;
532 foreach_efi_map_entry(efihdr, handle_efi_map_entry, &exclude);
536 exclude_efi_map_entries(struct efi_map_header *efihdr)
539 foreach_efi_map_entry(efihdr, handle_efi_map_entry, &exclude);
543 print_efi_map_entry(struct efi_md *p, void *argp __unused)
546 static const char *types[] = {
552 "RuntimeServicesCode",
553 "RuntimeServicesData",
554 "ConventionalMemory",
559 "MemoryMappedIOPortSpace",
564 if (p->md_type < nitems(types))
565 type = types[p->md_type];
568 printf("%23s %012lx %012lx %08lx ", type, p->md_phys,
569 p->md_virt, p->md_pages);
570 if (p->md_attr & EFI_MD_ATTR_UC)
572 if (p->md_attr & EFI_MD_ATTR_WC)
574 if (p->md_attr & EFI_MD_ATTR_WT)
576 if (p->md_attr & EFI_MD_ATTR_WB)
578 if (p->md_attr & EFI_MD_ATTR_UCE)
580 if (p->md_attr & EFI_MD_ATTR_WP)
582 if (p->md_attr & EFI_MD_ATTR_RP)
584 if (p->md_attr & EFI_MD_ATTR_XP)
586 if (p->md_attr & EFI_MD_ATTR_NV)
588 if (p->md_attr & EFI_MD_ATTR_MORE_RELIABLE)
589 printf("MORE_RELIABLE ");
590 if (p->md_attr & EFI_MD_ATTR_RO)
592 if (p->md_attr & EFI_MD_ATTR_RT)
598 print_efi_map_entries(struct efi_map_header *efihdr)
601 printf("%23s %12s %12s %8s %4s\n",
602 "Type", "Physical", "Virtual", "#Pages", "Attr");
603 foreach_efi_map_entry(efihdr, print_efi_map_entry, NULL);
607 * Map the passed in VA in EFI space to a void * using the efi memory table to
608 * find the PA and return it in the DMAP, if it exists. We're used between the
609 * calls to pmap_bootstrap() and physmem_init_kernel_globals() to parse CFG
610 * tables We assume that either the entry you are mapping fits within its page,
611 * or if it spills to the next page, that's contiguous in PA and in the DMAP.
612 * All observed tables obey the first part of this precondition.
614 struct early_map_data
621 efi_early_map_entry(struct efi_md *p, void *argp)
623 struct early_map_data *emdp = argp;
628 if ((p->md_attr & EFI_MD_ATTR_RT) == 0)
631 e = p->md_virt + p->md_pages * EFI_PAGE_SIZE;
632 if (emdp->va < s || emdp->va >= e)
634 emdp->pa = p->md_phys + (emdp->va - p->md_virt);
638 efi_early_map(vm_offset_t va)
640 struct early_map_data emd = { .va = va };
642 foreach_efi_map_entry(efihdr, efi_early_map_entry, &emd);
645 return (void *)PHYS_TO_DMAP(emd.pa);
650 * When booted via kboot, the prior kernel will pass in reserved memory areas in
651 * a EFI config table. We need to find that table and walk through it excluding
652 * the memory ranges in it. btw, this is called too early for the printf to do
653 * anything since msgbufp isn't initialized, let alone a console...
656 exclude_efi_memreserve(vm_offset_t efi_systbl_phys)
658 struct efi_systbl *systbl;
659 struct uuid efi_memreserve = LINUX_EFI_MEMRESERVE_TABLE;
661 systbl = (struct efi_systbl *)PHYS_TO_DMAP(efi_systbl_phys);
662 if (systbl == NULL) {
663 printf("can't map systbl\n");
666 if (systbl->st_hdr.th_sig != EFI_SYSTBL_SIG) {
667 printf("Bad signature for systbl %#lx\n", systbl->st_hdr.th_sig);
672 * We don't yet have the pmap system booted enough to create a pmap for
673 * the efi firmware's preferred address space from the GetMemoryMap()
674 * table. The st_cfgtbl is a VA in this space, so we need to do the
675 * mapping ourselves to a kernel VA with efi_early_map. We assume that
676 * the cfgtbl entries don't span a page. Other pointers are PAs, as
679 if (systbl->st_cfgtbl == 0) /* Failsafe st_entries should == 0 in this case */
681 for (int i = 0; i < systbl->st_entries; i++) {
682 struct efi_cfgtbl *cfgtbl;
683 struct linux_efi_memreserve *mr;
685 cfgtbl = efi_early_map(systbl->st_cfgtbl + i * sizeof(*cfgtbl));
687 panic("Can't map the config table entry %d\n", i);
688 if (memcmp(&cfgtbl->ct_uuid, &efi_memreserve, sizeof(struct uuid)) != 0)
692 * cfgtbl points are either VA or PA, depending on the GUID of
693 * the table. memreserve GUID pointers are PA and not converted
694 * after a SetVirtualAddressMap(). The list's mr_next pointer
697 mr = (struct linux_efi_memreserve *)PHYS_TO_DMAP(
698 (vm_offset_t)cfgtbl->ct_data);
700 for (int j = 0; j < mr->mr_count; j++) {
701 struct linux_efi_memreserve_entry *mre;
703 mre = &mr->mr_entry[j];
704 physmem_exclude_region(mre->mre_base, mre->mre_size,
705 EXFLAG_NODUMP | EXFLAG_NOALLOC);
707 if (mr->mr_next == 0)
709 mr = (struct linux_efi_memreserve *)PHYS_TO_DMAP(mr->mr_next);
717 try_load_dtb(caddr_t kmdp)
721 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
722 #if defined(FDT_DTB_STATIC)
724 * In case the device tree blob was not retrieved (from metadata) try
725 * to use the statically embedded one.
728 dtbp = (vm_offset_t)&fdt_static_dtb;
731 if (dtbp == (vm_offset_t)NULL) {
733 printf("ERROR loading DTB\n");
738 if (OF_install(OFW_FDT, 0) == FALSE)
739 panic("Cannot install FDT");
741 if (OF_init((void *)dtbp) != 0)
742 panic("OF_init failed with the found device tree");
744 parse_fdt_bootargs();
751 bool has_acpi, has_fdt;
754 has_acpi = has_fdt = false;
757 has_fdt = (OF_peer(0) != 0);
760 has_acpi = (AcpiOsGetRootPointer() != 0);
763 env = kern_getenv("kern.cfg.order");
766 while (order != NULL) {
768 strncmp(order, "acpi", 4) == 0 &&
769 (order[4] == ',' || order[4] == '\0')) {
770 arm64_bus_method = ARM64_BUS_ACPI;
774 strncmp(order, "fdt", 3) == 0 &&
775 (order[3] == ',' || order[3] == '\0')) {
776 arm64_bus_method = ARM64_BUS_FDT;
779 order = strchr(order, ',');
781 order++; /* Skip comma */
785 /* If we set the bus method it is valid */
786 if (arm64_bus_method != ARM64_BUS_NONE)
789 /* If no order or an invalid order was set use the default */
790 if (arm64_bus_method == ARM64_BUS_NONE) {
792 arm64_bus_method = ARM64_BUS_FDT;
794 arm64_bus_method = ARM64_BUS_ACPI;
798 * If no option was set the default is valid, otherwise we are
799 * setting one to get cninit() working, then calling panic to tell
800 * the user about the invalid bus setup.
802 return (env == NULL);
808 int dczva_line_shift;
811 identify_cache(READ_SPECIALREG(ctr_el0));
813 dczid_el0 = READ_SPECIALREG(dczid_el0);
815 /* Check if dc zva is not prohibited */
816 if (dczid_el0 & DCZID_DZP)
819 /* Same as with above calculations */
820 dczva_line_shift = DCZID_BS_SIZE(dczid_el0);
821 dczva_line_size = sizeof(int) << dczva_line_shift;
823 /* Change pagezero function */
824 pagezero = pagezero_cache;
829 memory_mapping_mode(vm_paddr_t pa)
831 struct efi_md *map, *p;
836 return (VM_MEMATTR_WRITE_BACK);
839 * Memory map data provided by UEFI via the GetMemoryMap
842 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
843 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
845 if (efihdr->descriptor_size == 0)
846 return (VM_MEMATTR_WRITE_BACK);
847 ndesc = efihdr->memory_size / efihdr->descriptor_size;
849 for (i = 0, p = map; i < ndesc; i++,
850 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
851 if (pa < p->md_phys ||
852 pa >= p->md_phys + p->md_pages * EFI_PAGE_SIZE)
854 if (p->md_type == EFI_MD_TYPE_IOMEM ||
855 p->md_type == EFI_MD_TYPE_IOPORT)
856 return (VM_MEMATTR_DEVICE);
857 else if ((p->md_attr & EFI_MD_ATTR_WB) != 0 ||
858 p->md_type == EFI_MD_TYPE_RECLAIM)
859 return (VM_MEMATTR_WRITE_BACK);
860 else if ((p->md_attr & EFI_MD_ATTR_WT) != 0)
861 return (VM_MEMATTR_WRITE_THROUGH);
862 else if ((p->md_attr & EFI_MD_ATTR_WC) != 0)
863 return (VM_MEMATTR_WRITE_COMBINING);
867 return (VM_MEMATTR_DEVICE);
871 initarm(struct arm64_bootparams *abp)
873 struct efi_fb *efifb;
877 struct mem_region mem_regions[FDT_MEM_REGIONS];
880 char dts_version[255];
882 vm_offset_t lastaddr;
886 TSRAW(&thread0, TS_ENTER, __func__, NULL);
888 boot_el = abp->boot_el;
889 hcr_el2 = abp->hcr_el2;
891 /* Parse loader or FDT boot parametes. Determine last used address. */
892 lastaddr = parse_boot_param(abp);
894 /* Find the kernel address */
895 kmdp = preload_search_by_type("elf kernel");
897 kmdp = preload_search_by_type("elf64 kernel");
900 identify_hypervisor_smbios();
902 update_special_regs(0);
904 link_elf_ireloc(kmdp);
909 efi_systbl_phys = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t);
911 /* Load the physical memory ranges */
912 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
913 MODINFO_METADATA | MODINFOMD_EFI_MAP);
915 add_efi_map_entries(efihdr);
918 /* Grab physical memory regions information from device tree. */
919 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,
921 panic("Cannot get physical memory regions");
922 physmem_hardware_regions(mem_regions, mem_regions_sz);
924 if (fdt_get_reserved_mem(mem_regions, &mem_regions_sz) == 0)
925 physmem_exclude_regions(mem_regions, mem_regions_sz,
926 EXFLAG_NODUMP | EXFLAG_NOALLOC);
929 /* Exclude the EFI framebuffer from our view of physical memory. */
930 efifb = (struct efi_fb *)preload_search_info(kmdp,
931 MODINFO_METADATA | MODINFOMD_EFI_FB);
933 physmem_exclude_region(efifb->fb_addr, efifb->fb_size,
936 /* Set the pcpu data, this is needed by pmap_bootstrap */
938 pcpu_init(pcpup, 0, sizeof(struct pcpu));
941 * Set the pcpu pointer with a backup in tpidr_el1 to be
942 * loaded when entering the kernel from userland.
946 "msr tpidr_el1, %0" :: "r"(pcpup));
948 /* locore.S sets sp_el0 to &thread0 so no need to set it here. */
949 PCPU_SET(curthread, &thread0);
950 PCPU_SET(midr, get_midr());
952 /* Do basic tuning, hz etc */
958 /* Bootstrap enough of pmap to enter the kernel proper */
959 pmap_bootstrap(lastaddr - KERNBASE);
960 /* Exclude entries needed in the DMAP region, but not phys_avail */
962 exclude_efi_map_entries(efihdr);
963 /* Do the same for reserve entries in the EFI MEMRESERVE table */
964 if (efi_systbl_phys != 0)
965 exclude_efi_memreserve(efi_systbl_phys);
968 * We carefully bootstrap the sanitizer map after we've excluded
969 * absolutely everything else that could impact phys_avail. There's not
970 * always enough room for the initial shadow map after the kernel, so
971 * we'll end up searching for segments that we can safely use. Those
972 * segments also get excluded from phys_avail.
975 pmap_bootstrap_san();
978 physmem_init_kernel_globals();
980 devmap_bootstrap(0, NULL);
985 set_ttbr0(abp->kern_ttbr0);
989 panic("Invalid bus configuration: %s",
990 kern_getenv("kern.cfg.order"));
993 * Check if pointer authentication is available on this system, and
994 * if so enable its use. This needs to be called before init_proc0
995 * as that will configure the thread0 pointer authentication keys.
1000 * Dump the boot metadata. We have to wait for cninit() since console
1001 * output is required. If it's grossly incorrect the kernel will never
1004 if (getenv_is_true("debug.dump_modinfo_at_boot"))
1007 init_proc0(abp->kern_stack);
1008 msgbufinit(msgbufp, msgbufsize);
1010 init_param2(physmem);
1015 if ((boothowto & RB_KDB) != 0)
1016 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
1023 env = kern_getenv("kernelname");
1025 strlcpy(kernelname, env, sizeof(kernelname));
1028 if (arm64_bus_method == ARM64_BUS_FDT) {
1029 root = OF_finddevice("/");
1030 if (OF_getprop(root, "freebsd,dts-version", dts_version, sizeof(dts_version)) > 0) {
1031 if (strcmp(LINUX_DTS_VERSION, dts_version) != 0)
1032 printf("WARNING: DTB version is %s while kernel expects %s, "
1033 "please update the DTB in the ESP\n",
1037 printf("WARNING: Cannot find freebsd,dts-version property, "
1038 "cannot check DTB compliance\n");
1043 if (boothowto & RB_VERBOSE) {
1045 print_efi_map_entries(efihdr);
1046 physmem_print_tables();
1051 if (bootverbose && kstack_pages != KSTACK_PAGES)
1052 printf("kern.kstack_pages = %d ignored for thread0\n",
1063 WRITE_SPECIALREG(oslar_el1, 0);
1065 /* This permits DDB to use debug registers for watchpoints. */
1068 /* TODO: Eventually will need to initialize debug registers here. */
1072 #include <ddb/ddb.h>
1074 DB_SHOW_COMMAND(specialregs, db_show_spregs)
1076 #define PRINT_REG(reg) \
1077 db_printf(__STRING(reg) " = %#016lx\n", READ_SPECIALREG(reg))
1079 PRINT_REG(actlr_el1);
1080 PRINT_REG(afsr0_el1);
1081 PRINT_REG(afsr1_el1);
1082 PRINT_REG(aidr_el1);
1083 PRINT_REG(amair_el1);
1084 PRINT_REG(ccsidr_el1);
1085 PRINT_REG(clidr_el1);
1086 PRINT_REG(contextidr_el1);
1087 PRINT_REG(cpacr_el1);
1088 PRINT_REG(csselr_el1);
1090 PRINT_REG(currentel);
1092 PRINT_REG(dczid_el0);
1097 /* ARM64TODO: Enable VFP before reading floating-point registers */
1101 PRINT_REG(id_aa64afr0_el1);
1102 PRINT_REG(id_aa64afr1_el1);
1103 PRINT_REG(id_aa64dfr0_el1);
1104 PRINT_REG(id_aa64dfr1_el1);
1105 PRINT_REG(id_aa64isar0_el1);
1106 PRINT_REG(id_aa64isar1_el1);
1107 PRINT_REG(id_aa64pfr0_el1);
1108 PRINT_REG(id_aa64pfr1_el1);
1109 PRINT_REG(id_afr0_el1);
1110 PRINT_REG(id_dfr0_el1);
1111 PRINT_REG(id_isar0_el1);
1112 PRINT_REG(id_isar1_el1);
1113 PRINT_REG(id_isar2_el1);
1114 PRINT_REG(id_isar3_el1);
1115 PRINT_REG(id_isar4_el1);
1116 PRINT_REG(id_isar5_el1);
1117 PRINT_REG(id_mmfr0_el1);
1118 PRINT_REG(id_mmfr1_el1);
1119 PRINT_REG(id_mmfr2_el1);
1120 PRINT_REG(id_mmfr3_el1);
1122 /* Missing from llvm */
1123 PRINT_REG(id_mmfr4_el1);
1125 PRINT_REG(id_pfr0_el1);
1126 PRINT_REG(id_pfr1_el1);
1128 PRINT_REG(mair_el1);
1129 PRINT_REG(midr_el1);
1130 PRINT_REG(mpidr_el1);
1131 PRINT_REG(mvfr0_el1);
1132 PRINT_REG(mvfr1_el1);
1133 PRINT_REG(mvfr2_el1);
1134 PRINT_REG(revidr_el1);
1135 PRINT_REG(sctlr_el1);
1138 PRINT_REG(spsr_el1);
1140 PRINT_REG(tpidr_el0);
1141 PRINT_REG(tpidr_el1);
1142 PRINT_REG(tpidrro_el0);
1143 PRINT_REG(ttbr0_el1);
1144 PRINT_REG(ttbr1_el1);
1145 PRINT_REG(vbar_el1);
1149 DB_SHOW_COMMAND(vtop, db_show_vtop)
1154 phys = arm64_address_translate_s1e1r(addr);
1155 db_printf("EL1 physical address reg (read): 0x%016lx\n", phys);
1156 phys = arm64_address_translate_s1e1w(addr);
1157 db_printf("EL1 physical address reg (write): 0x%016lx\n", phys);
1158 phys = arm64_address_translate_s1e0r(addr);
1159 db_printf("EL0 physical address reg (read): 0x%016lx\n", phys);
1160 phys = arm64_address_translate_s1e0w(addr);
1161 db_printf("EL0 physical address reg (write): 0x%016lx\n", phys);
1163 db_printf("show vtop <virt_addr>\n");