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_compat.h"
30 #include "opt_platform.h"
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/systm.h>
42 #include <sys/devmap.h>
45 #include <sys/imgact.h>
47 #include <sys/kernel.h>
48 #include <sys/limits.h>
49 #include <sys/linker.h>
50 #include <sys/msgbuf.h>
53 #include <sys/ptrace.h>
54 #include <sys/reboot.h>
55 #include <sys/rwlock.h>
56 #include <sys/sched.h>
57 #include <sys/signalvar.h>
58 #include <sys/syscallsubr.h>
59 #include <sys/sysent.h>
60 #include <sys/sysproto.h>
61 #include <sys/ucontext.h>
65 #include <vm/vm_kern.h>
66 #include <vm/vm_object.h>
67 #include <vm/vm_page.h>
69 #include <vm/vm_map.h>
70 #include <vm/vm_pager.h>
72 #include <machine/armreg.h>
73 #include <machine/cpu.h>
74 #include <machine/debug_monitor.h>
75 #include <machine/kdb.h>
76 #include <machine/machdep.h>
77 #include <machine/metadata.h>
78 #include <machine/md_var.h>
79 #include <machine/pcb.h>
80 #include <machine/reg.h>
81 #include <machine/undefined.h>
82 #include <machine/vmparam.h>
85 #include <machine/vfp.h>
89 #include <contrib/dev/acpica/include/acpi.h>
90 #include <machine/acpica_machdep.h>
94 #include <dev/fdt/fdt_common.h>
95 #include <dev/ofw/openfirm.h>
99 enum arm64_bus arm64_bus_method = ARM64_BUS_NONE;
101 struct pcpu __pcpu[MAXCPU];
103 static struct trapframe proc0_tf;
105 vm_paddr_t phys_avail[PHYS_AVAIL_SIZE + 2];
106 vm_paddr_t dump_avail[PHYS_AVAIL_SIZE + 2];
113 #define PHYSMAP_SIZE (2 * (VM_PHYSSEG_MAX - 1))
114 vm_paddr_t physmap[PHYSMAP_SIZE];
117 struct kva_md_info kmi;
119 int64_t dcache_line_size; /* The minimum D cache line size */
120 int64_t icache_line_size; /* The minimum I cache line size */
121 int64_t idcache_line_size; /* The minimum cache line size */
122 int64_t dczva_line_size; /* The size of cache line the dc zva zeroes */
126 * Physical address of the EFI System Table. Stashed from the metadata hints
127 * passed into the kernel and used by the EFI code to call runtime services.
129 vm_paddr_t efi_systbl_phys;
131 /* pagezero_* implementations are provided in support.S */
132 void pagezero_simple(void *);
133 void pagezero_cache(void *);
135 /* pagezero_simple is default pagezero */
136 void (*pagezero)(void *p) = pagezero_simple;
141 uint64_t id_aa64mfr1;
143 id_aa64mfr1 = READ_SPECIALREG(id_aa64mmfr1_el1);
144 if (ID_AA64MMFR1_PAN(id_aa64mfr1) != ID_AA64MMFR1_PAN_NONE)
153 * The LLVM integrated assembler doesn't understand the PAN
154 * PSTATE field. Because of this we need to manually create
155 * the instruction in an asm block. This is equivalent to:
158 * This sets the PAN bit, stopping the kernel from accessing
159 * memory when userspace can also access it unless the kernel
160 * uses the userspace load/store instructions.
163 WRITE_SPECIALREG(sctlr_el1,
164 READ_SPECIALREG(sctlr_el1) & ~SCTLR_SPAN);
165 __asm __volatile(".inst 0xd500409f | (0x1 << 8)");
170 cpu_startup(void *dummy)
176 vm_ksubmap_init(&kmi);
178 vm_pager_bufferinit();
181 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
184 cpu_idle_wakeup(int cpu)
191 fill_regs(struct thread *td, struct reg *regs)
193 struct trapframe *frame;
195 frame = td->td_frame;
196 regs->sp = frame->tf_sp;
197 regs->lr = frame->tf_lr;
198 regs->elr = frame->tf_elr;
199 regs->spsr = frame->tf_spsr;
201 memcpy(regs->x, frame->tf_x, sizeof(regs->x));
207 set_regs(struct thread *td, struct reg *regs)
209 struct trapframe *frame;
211 frame = td->td_frame;
212 frame->tf_sp = regs->sp;
213 frame->tf_lr = regs->lr;
214 frame->tf_elr = regs->elr;
215 frame->tf_spsr &= ~PSR_FLAGS;
216 frame->tf_spsr |= regs->spsr & PSR_FLAGS;
218 memcpy(frame->tf_x, regs->x, sizeof(frame->tf_x));
224 fill_fpregs(struct thread *td, struct fpreg *regs)
230 if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
232 * If we have just been running VFP instructions we will
233 * need to save the state to memcpy it below.
236 vfp_save_state(td, pcb);
238 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
239 ("Called fill_fpregs while the kernel is using the VFP"));
240 memcpy(regs->fp_q, pcb->pcb_fpustate.vfp_regs,
242 regs->fp_cr = pcb->pcb_fpustate.vfp_fpcr;
243 regs->fp_sr = pcb->pcb_fpustate.vfp_fpsr;
246 memset(regs->fp_q, 0, sizeof(regs->fp_q));
251 set_fpregs(struct thread *td, struct fpreg *regs)
257 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
258 ("Called set_fpregs while the kernel is using the VFP"));
259 memcpy(pcb->pcb_fpustate.vfp_regs, regs->fp_q, sizeof(regs->fp_q));
260 pcb->pcb_fpustate.vfp_fpcr = regs->fp_cr;
261 pcb->pcb_fpustate.vfp_fpsr = regs->fp_sr;
267 fill_dbregs(struct thread *td, struct dbreg *regs)
270 printf("ARM64TODO: fill_dbregs");
275 set_dbregs(struct thread *td, struct dbreg *regs)
278 printf("ARM64TODO: set_dbregs");
282 #ifdef COMPAT_FREEBSD32
284 fill_regs32(struct thread *td, struct reg32 *regs)
287 printf("ARM64TODO: fill_regs32");
292 set_regs32(struct thread *td, struct reg32 *regs)
295 printf("ARM64TODO: set_regs32");
300 fill_fpregs32(struct thread *td, struct fpreg32 *regs)
303 printf("ARM64TODO: fill_fpregs32");
308 set_fpregs32(struct thread *td, struct fpreg32 *regs)
311 printf("ARM64TODO: set_fpregs32");
316 fill_dbregs32(struct thread *td, struct dbreg32 *regs)
319 printf("ARM64TODO: fill_dbregs32");
324 set_dbregs32(struct thread *td, struct dbreg32 *regs)
327 printf("ARM64TODO: set_dbregs32");
333 ptrace_set_pc(struct thread *td, u_long addr)
336 printf("ARM64TODO: ptrace_set_pc");
341 ptrace_single_step(struct thread *td)
344 td->td_frame->tf_spsr |= PSR_SS;
345 td->td_pcb->pcb_flags |= PCB_SINGLE_STEP;
350 ptrace_clear_single_step(struct thread *td)
353 td->td_frame->tf_spsr &= ~PSR_SS;
354 td->td_pcb->pcb_flags &= ~PCB_SINGLE_STEP;
359 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
361 struct trapframe *tf = td->td_frame;
363 memset(tf, 0, sizeof(struct trapframe));
366 tf->tf_sp = STACKALIGN(stack);
367 tf->tf_lr = imgp->entry_addr;
368 tf->tf_elr = imgp->entry_addr;
371 /* Sanity check these are the same size, they will be memcpy'd to and fro */
372 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
373 sizeof((struct gpregs *)0)->gp_x);
374 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
375 sizeof((struct reg *)0)->x);
378 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
380 struct trapframe *tf = td->td_frame;
382 if (clear_ret & GET_MC_CLEAR_RET) {
383 mcp->mc_gpregs.gp_x[0] = 0;
384 mcp->mc_gpregs.gp_spsr = tf->tf_spsr & ~PSR_C;
386 mcp->mc_gpregs.gp_x[0] = tf->tf_x[0];
387 mcp->mc_gpregs.gp_spsr = tf->tf_spsr;
390 memcpy(&mcp->mc_gpregs.gp_x[1], &tf->tf_x[1],
391 sizeof(mcp->mc_gpregs.gp_x[1]) * (nitems(mcp->mc_gpregs.gp_x) - 1));
393 mcp->mc_gpregs.gp_sp = tf->tf_sp;
394 mcp->mc_gpregs.gp_lr = tf->tf_lr;
395 mcp->mc_gpregs.gp_elr = tf->tf_elr;
401 set_mcontext(struct thread *td, mcontext_t *mcp)
403 struct trapframe *tf = td->td_frame;
406 spsr = mcp->mc_gpregs.gp_spsr;
407 if ((spsr & PSR_M_MASK) != PSR_M_EL0t ||
408 (spsr & (PSR_AARCH32 | PSR_F | PSR_I | PSR_A | PSR_D)) != 0)
411 memcpy(tf->tf_x, mcp->mc_gpregs.gp_x, sizeof(tf->tf_x));
413 tf->tf_sp = mcp->mc_gpregs.gp_sp;
414 tf->tf_lr = mcp->mc_gpregs.gp_lr;
415 tf->tf_elr = mcp->mc_gpregs.gp_elr;
416 tf->tf_spsr = mcp->mc_gpregs.gp_spsr;
422 get_fpcontext(struct thread *td, mcontext_t *mcp)
429 curpcb = curthread->td_pcb;
431 if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
433 * If we have just been running VFP instructions we will
434 * need to save the state to memcpy it below.
436 vfp_save_state(td, curpcb);
438 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
439 ("Called get_fpcontext while the kernel is using the VFP"));
440 KASSERT((curpcb->pcb_fpflags & ~PCB_FP_USERMASK) == 0,
441 ("Non-userspace FPU flags set in get_fpcontext"));
442 memcpy(mcp->mc_fpregs.fp_q, curpcb->pcb_fpustate.vfp_regs,
443 sizeof(mcp->mc_fpregs));
444 mcp->mc_fpregs.fp_cr = curpcb->pcb_fpustate.vfp_fpcr;
445 mcp->mc_fpregs.fp_sr = curpcb->pcb_fpustate.vfp_fpsr;
446 mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags;
447 mcp->mc_flags |= _MC_FP_VALID;
455 set_fpcontext(struct thread *td, mcontext_t *mcp)
462 if ((mcp->mc_flags & _MC_FP_VALID) != 0) {
463 curpcb = curthread->td_pcb;
466 * Discard any vfp state for the current thread, we
467 * are about to override it.
471 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
472 ("Called set_fpcontext while the kernel is using the VFP"));
473 memcpy(curpcb->pcb_fpustate.vfp_regs, mcp->mc_fpregs.fp_q,
474 sizeof(mcp->mc_fpregs));
475 curpcb->pcb_fpustate.vfp_fpcr = mcp->mc_fpregs.fp_cr;
476 curpcb->pcb_fpustate.vfp_fpsr = mcp->mc_fpregs.fp_sr;
477 curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags & PCB_FP_USERMASK;
491 if (!sched_runnable())
504 /* We should have shutdown by now, if not enter a low power sleep */
507 __asm __volatile("wfi");
512 * Flush the D-cache for non-DMA I/O so that the I-cache can
513 * be made coherent later.
516 cpu_flush_dcache(void *ptr, size_t len)
522 /* Get current clock frequency for the given CPU ID. */
524 cpu_est_clockrate(int cpu_id, uint64_t *rate)
528 pc = pcpu_find(cpu_id);
529 if (pc == NULL || rate == NULL)
532 if (pc->pc_clock == 0)
535 *rate = pc->pc_clock;
540 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
543 pcpu->pc_acpi_id = 0xffffffff;
553 if (td->td_md.md_spinlock_count == 0) {
554 daif = intr_disable();
555 td->td_md.md_spinlock_count = 1;
556 td->td_md.md_saved_daif = daif;
558 td->td_md.md_spinlock_count++;
570 daif = td->td_md.md_saved_daif;
571 td->td_md.md_spinlock_count--;
572 if (td->td_md.md_spinlock_count == 0)
576 #ifndef _SYS_SYSPROTO_H_
577 struct sigreturn_args {
583 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
590 if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
593 error = set_mcontext(td, &uc.uc_mcontext);
596 set_fpcontext(td, &uc.uc_mcontext);
598 /* Restore signal mask. */
599 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
601 return (EJUSTRETURN);
605 * Construct a PCB from a trapframe. This is called from kdb_trap() where
606 * we want to start a backtrace from the function that caused us to enter
607 * the debugger. We have the context in the trapframe, but base the trace
608 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
609 * enough for a backtrace.
612 makectx(struct trapframe *tf, struct pcb *pcb)
616 for (i = 0; i < PCB_LR; i++)
617 pcb->pcb_x[i] = tf->tf_x[i];
619 pcb->pcb_x[PCB_LR] = tf->tf_lr;
620 pcb->pcb_pc = tf->tf_elr;
621 pcb->pcb_sp = tf->tf_sp;
625 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
629 struct trapframe *tf;
630 struct sigframe *fp, frame;
632 struct sysentvec *sysent;
633 int code, onstack, sig;
637 PROC_LOCK_ASSERT(p, MA_OWNED);
639 sig = ksi->ksi_signo;
640 code = ksi->ksi_code;
642 mtx_assert(&psp->ps_mtx, MA_OWNED);
645 onstack = sigonstack(tf->tf_sp);
647 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
650 /* Allocate and validate space for the signal handler context. */
651 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack &&
652 SIGISMEMBER(psp->ps_sigonstack, sig)) {
653 fp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp +
654 td->td_sigstk.ss_size);
655 #if defined(COMPAT_43)
656 td->td_sigstk.ss_flags |= SS_ONSTACK;
659 fp = (struct sigframe *)td->td_frame->tf_sp;
662 /* Make room, keeping the stack aligned */
664 fp = (struct sigframe *)STACKALIGN(fp);
666 /* Fill in the frame to copy out */
667 get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
668 get_fpcontext(td, &frame.sf_uc.uc_mcontext);
669 frame.sf_si = ksi->ksi_info;
670 frame.sf_uc.uc_sigmask = *mask;
671 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
672 ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE;
673 frame.sf_uc.uc_stack = td->td_sigstk;
674 mtx_unlock(&psp->ps_mtx);
675 PROC_UNLOCK(td->td_proc);
677 /* Copy the sigframe out to the user's stack. */
678 if (copyout(&frame, fp, sizeof(*fp)) != 0) {
679 /* Process has trashed its stack. Kill it. */
680 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp);
686 tf->tf_x[1] = (register_t)&fp->sf_si;
687 tf->tf_x[2] = (register_t)&fp->sf_uc;
689 tf->tf_elr = (register_t)catcher;
690 tf->tf_sp = (register_t)fp;
691 sysent = p->p_sysent;
692 if (sysent->sv_sigcode_base != 0)
693 tf->tf_lr = (register_t)sysent->sv_sigcode_base;
695 tf->tf_lr = (register_t)(sysent->sv_psstrings -
696 *(sysent->sv_szsigcode));
698 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr,
702 mtx_lock(&psp->ps_mtx);
706 init_proc0(vm_offset_t kstack)
708 struct pcpu *pcpup = &__pcpu[0];
710 proc_linkup0(&proc0, &thread0);
711 thread0.td_kstack = kstack;
712 thread0.td_pcb = (struct pcb *)(thread0.td_kstack) - 1;
713 thread0.td_pcb->pcb_fpflags = 0;
714 thread0.td_pcb->pcb_fpusaved = &thread0.td_pcb->pcb_fpustate;
715 thread0.td_pcb->pcb_vfpcpu = UINT_MAX;
716 thread0.td_frame = &proc0_tf;
717 pcpup->pc_curpcb = thread0.td_pcb;
726 } EFI_MEMORY_DESCRIPTOR;
729 add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap,
732 u_int i, insert_idx, _physmap_idx;
734 _physmap_idx = *physmap_idxp;
740 * Find insertion point while checking for overlap. Start off by
741 * assuming the new entry will be added to the end.
743 insert_idx = _physmap_idx;
744 for (i = 0; i <= _physmap_idx; i += 2) {
745 if (base < physmap[i + 1]) {
746 if (base + length <= physmap[i]) {
750 if (boothowto & RB_VERBOSE)
752 "Overlapping memory regions, ignoring second region\n");
757 /* See if we can prepend to the next entry. */
758 if (insert_idx <= _physmap_idx &&
759 base + length == physmap[insert_idx]) {
760 physmap[insert_idx] = base;
764 /* See if we can append to the previous entry. */
765 if (insert_idx > 0 && base == physmap[insert_idx - 1]) {
766 physmap[insert_idx - 1] += length;
771 *physmap_idxp = _physmap_idx;
772 if (_physmap_idx == PHYSMAP_SIZE) {
774 "Too many segments in the physical address map, giving up\n");
779 * Move the last 'N' entries down to make room for the new
782 for (i = _physmap_idx; i > insert_idx; i -= 2) {
783 physmap[i] = physmap[i - 2];
784 physmap[i + 1] = physmap[i - 1];
787 /* Insert the new entry. */
788 physmap[insert_idx] = base;
789 physmap[insert_idx + 1] = base + length;
795 add_fdt_mem_regions(struct mem_region *mr, int mrcnt, vm_paddr_t *physmap,
799 for (int i = 0; i < mrcnt; i++) {
800 if (!add_physmap_entry(mr[i].mr_start, mr[i].mr_size, physmap,
808 add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap,
811 struct efi_md *map, *p;
816 static const char *types[] = {
822 "RuntimeServicesCode",
823 "RuntimeServicesData",
824 "ConventionalMemory",
829 "MemoryMappedIOPortSpace",
835 * Memory map data provided by UEFI via the GetMemoryMap
838 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
839 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
841 if (efihdr->descriptor_size == 0)
843 ndesc = efihdr->memory_size / efihdr->descriptor_size;
845 if (boothowto & RB_VERBOSE)
846 printf("%23s %12s %12s %8s %4s\n",
847 "Type", "Physical", "Virtual", "#Pages", "Attr");
849 for (i = 0, p = map; i < ndesc; i++,
850 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
851 if (boothowto & RB_VERBOSE) {
852 if (p->md_type < nitems(types))
853 type = types[p->md_type];
856 printf("%23s %012lx %12p %08lx ", type, p->md_phys,
857 p->md_virt, p->md_pages);
858 if (p->md_attr & EFI_MD_ATTR_UC)
860 if (p->md_attr & EFI_MD_ATTR_WC)
862 if (p->md_attr & EFI_MD_ATTR_WT)
864 if (p->md_attr & EFI_MD_ATTR_WB)
866 if (p->md_attr & EFI_MD_ATTR_UCE)
868 if (p->md_attr & EFI_MD_ATTR_WP)
870 if (p->md_attr & EFI_MD_ATTR_RP)
872 if (p->md_attr & EFI_MD_ATTR_XP)
874 if (p->md_attr & EFI_MD_ATTR_NV)
876 if (p->md_attr & EFI_MD_ATTR_MORE_RELIABLE)
877 printf("MORE_RELIABLE ");
878 if (p->md_attr & EFI_MD_ATTR_RO)
880 if (p->md_attr & EFI_MD_ATTR_RT)
885 switch (p->md_type) {
886 case EFI_MD_TYPE_CODE:
887 case EFI_MD_TYPE_DATA:
888 case EFI_MD_TYPE_BS_CODE:
889 case EFI_MD_TYPE_BS_DATA:
890 case EFI_MD_TYPE_FREE:
892 * We're allowed to use any entry with these types.
899 if (!add_physmap_entry(p->md_phys, (p->md_pages * PAGE_SIZE),
900 physmap, physmap_idxp))
907 try_load_dtb(caddr_t kmdp)
911 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
912 if (dtbp == (vm_offset_t)NULL) {
913 printf("ERROR loading DTB\n");
917 if (OF_install(OFW_FDT, 0) == FALSE)
918 panic("Cannot install FDT");
920 if (OF_init((void *)dtbp) != 0)
921 panic("OF_init failed with the found device tree");
928 bool has_acpi, has_fdt;
931 has_acpi = has_fdt = false;
934 has_fdt = (OF_peer(0) != 0);
937 has_acpi = (acpi_find_table(ACPI_SIG_SPCR) != 0);
940 env = kern_getenv("kern.cfg.order");
943 while (order != NULL) {
945 strncmp(order, "acpi", 4) == 0 &&
946 (order[4] == ',' || order[4] == '\0')) {
947 arm64_bus_method = ARM64_BUS_ACPI;
951 strncmp(order, "fdt", 3) == 0 &&
952 (order[3] == ',' || order[3] == '\0')) {
953 arm64_bus_method = ARM64_BUS_FDT;
956 order = strchr(order, ',');
960 /* If we set the bus method it is valid */
961 if (arm64_bus_method != ARM64_BUS_NONE)
964 /* If no order or an invalid order was set use the default */
965 if (arm64_bus_method == ARM64_BUS_NONE) {
967 arm64_bus_method = ARM64_BUS_FDT;
969 arm64_bus_method = ARM64_BUS_ACPI;
973 * If no option was set the default is valid, otherwise we are
974 * setting one to get cninit() working, then calling panic to tell
975 * the user about the invalid bus setup.
977 return (env == NULL);
983 int dcache_line_shift, icache_line_shift, dczva_line_shift;
987 ctr_el0 = READ_SPECIALREG(ctr_el0);
989 /* Read the log2 words in each D cache line */
990 dcache_line_shift = CTR_DLINE_SIZE(ctr_el0);
991 /* Get the D cache line size */
992 dcache_line_size = sizeof(int) << dcache_line_shift;
994 /* And the same for the I cache */
995 icache_line_shift = CTR_ILINE_SIZE(ctr_el0);
996 icache_line_size = sizeof(int) << icache_line_shift;
998 idcache_line_size = MIN(dcache_line_size, icache_line_size);
1000 dczid_el0 = READ_SPECIALREG(dczid_el0);
1002 /* Check if dc zva is not prohibited */
1003 if (dczid_el0 & DCZID_DZP)
1004 dczva_line_size = 0;
1006 /* Same as with above calculations */
1007 dczva_line_shift = DCZID_BS_SIZE(dczid_el0);
1008 dczva_line_size = sizeof(int) << dczva_line_shift;
1010 /* Change pagezero function */
1011 pagezero = pagezero_cache;
1016 initarm(struct arm64_bootparams *abp)
1018 struct efi_map_header *efihdr;
1022 struct mem_region mem_regions[FDT_MEM_REGIONS];
1025 vm_offset_t lastaddr;
1031 /* Set the module data location */
1032 preload_metadata = (caddr_t)(uintptr_t)(abp->modulep);
1034 /* Find the kernel address */
1035 kmdp = preload_search_by_type("elf kernel");
1037 kmdp = preload_search_by_type("elf64 kernel");
1039 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
1040 init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 0);
1046 efi_systbl_phys = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t);
1048 /* Find the address to start allocating from */
1049 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
1051 /* Load the physical memory ranges */
1053 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
1054 MODINFO_METADATA | MODINFOMD_EFI_MAP);
1056 add_efi_map_entries(efihdr, physmap, &physmap_idx);
1059 /* Grab physical memory regions information from device tree. */
1060 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,
1062 panic("Cannot get physical memory regions");
1063 add_fdt_mem_regions(mem_regions, mem_regions_sz, physmap,
1068 /* Print the memory map */
1070 for (i = 0; i < physmap_idx; i += 2) {
1071 dump_avail[i] = physmap[i];
1072 dump_avail[i + 1] = physmap[i + 1];
1073 mem_len += physmap[i + 1] - physmap[i];
1076 dump_avail[i + 1] = 0;
1078 /* Set the pcpu data, this is needed by pmap_bootstrap */
1080 pcpu_init(pcpup, 0, sizeof(struct pcpu));
1083 * Set the pcpu pointer with a backup in tpidr_el1 to be
1084 * loaded when entering the kernel from userland.
1088 "msr tpidr_el1, %0" :: "r"(pcpup));
1090 PCPU_SET(curthread, &thread0);
1092 /* Do basic tuning, hz etc */
1098 /* Bootstrap enough of pmap to enter the kernel proper */
1099 pmap_bootstrap(abp->kern_l0pt, abp->kern_l1pt,
1100 KERNBASE - abp->kern_delta, lastaddr - KERNBASE);
1102 devmap_bootstrap(0, NULL);
1104 valid = bus_probe();
1109 panic("Invalid bus configuration: %s",
1110 kern_getenv("kern.cfg.order"));
1112 init_proc0(abp->kern_stack);
1113 msgbufinit(msgbufp, msgbufsize);
1115 init_param2(physmem);
1121 env = kern_getenv("kernelname");
1123 strlcpy(kernelname, env, sizeof(kernelname));
1133 WRITE_SPECIALREG(OSLAR_EL1, 0);
1135 /* This permits DDB to use debug registers for watchpoints. */
1138 /* TODO: Eventually will need to initialize debug registers here. */
1142 #include <ddb/ddb.h>
1144 DB_SHOW_COMMAND(specialregs, db_show_spregs)
1146 #define PRINT_REG(reg) \
1147 db_printf(__STRING(reg) " = %#016lx\n", READ_SPECIALREG(reg))
1149 PRINT_REG(actlr_el1);
1150 PRINT_REG(afsr0_el1);
1151 PRINT_REG(afsr1_el1);
1152 PRINT_REG(aidr_el1);
1153 PRINT_REG(amair_el1);
1154 PRINT_REG(ccsidr_el1);
1155 PRINT_REG(clidr_el1);
1156 PRINT_REG(contextidr_el1);
1157 PRINT_REG(cpacr_el1);
1158 PRINT_REG(csselr_el1);
1160 PRINT_REG(currentel);
1162 PRINT_REG(dczid_el0);
1167 /* ARM64TODO: Enable VFP before reading floating-point registers */
1171 PRINT_REG(id_aa64afr0_el1);
1172 PRINT_REG(id_aa64afr1_el1);
1173 PRINT_REG(id_aa64dfr0_el1);
1174 PRINT_REG(id_aa64dfr1_el1);
1175 PRINT_REG(id_aa64isar0_el1);
1176 PRINT_REG(id_aa64isar1_el1);
1177 PRINT_REG(id_aa64pfr0_el1);
1178 PRINT_REG(id_aa64pfr1_el1);
1179 PRINT_REG(id_afr0_el1);
1180 PRINT_REG(id_dfr0_el1);
1181 PRINT_REG(id_isar0_el1);
1182 PRINT_REG(id_isar1_el1);
1183 PRINT_REG(id_isar2_el1);
1184 PRINT_REG(id_isar3_el1);
1185 PRINT_REG(id_isar4_el1);
1186 PRINT_REG(id_isar5_el1);
1187 PRINT_REG(id_mmfr0_el1);
1188 PRINT_REG(id_mmfr1_el1);
1189 PRINT_REG(id_mmfr2_el1);
1190 PRINT_REG(id_mmfr3_el1);
1192 /* Missing from llvm */
1193 PRINT_REG(id_mmfr4_el1);
1195 PRINT_REG(id_pfr0_el1);
1196 PRINT_REG(id_pfr1_el1);
1198 PRINT_REG(mair_el1);
1199 PRINT_REG(midr_el1);
1200 PRINT_REG(mpidr_el1);
1201 PRINT_REG(mvfr0_el1);
1202 PRINT_REG(mvfr1_el1);
1203 PRINT_REG(mvfr2_el1);
1204 PRINT_REG(revidr_el1);
1205 PRINT_REG(sctlr_el1);
1208 PRINT_REG(spsr_el1);
1210 PRINT_REG(tpidr_el0);
1211 PRINT_REG(tpidr_el1);
1212 PRINT_REG(tpidrro_el0);
1213 PRINT_REG(ttbr0_el1);
1214 PRINT_REG(ttbr1_el1);
1215 PRINT_REG(vbar_el1);
1219 DB_SHOW_COMMAND(vtop, db_show_vtop)
1224 phys = arm64_address_translate_s1e1r(addr);
1225 db_printf("EL1 physical address reg (read): 0x%016lx\n", phys);
1226 phys = arm64_address_translate_s1e1w(addr);
1227 db_printf("EL1 physical address reg (write): 0x%016lx\n", phys);
1228 phys = arm64_address_translate_s1e0r(addr);
1229 db_printf("EL0 physical address reg (read): 0x%016lx\n", phys);
1230 phys = arm64_address_translate_s1e0w(addr);
1231 db_printf("EL0 physical address reg (write): 0x%016lx\n", phys);
1233 db_printf("show vtop <virt_addr>\n");