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_platform.h"
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
41 #include <sys/devmap.h>
44 #include <sys/imgact.h>
46 #include <sys/kernel.h>
47 #include <sys/limits.h>
48 #include <sys/linker.h>
49 #include <sys/msgbuf.h>
52 #include <sys/ptrace.h>
53 #include <sys/reboot.h>
54 #include <sys/rwlock.h>
55 #include <sys/sched.h>
56 #include <sys/signalvar.h>
57 #include <sys/syscallsubr.h>
58 #include <sys/sysent.h>
59 #include <sys/sysproto.h>
60 #include <sys/ucontext.h>
64 #include <vm/vm_kern.h>
65 #include <vm/vm_object.h>
66 #include <vm/vm_page.h>
68 #include <vm/vm_map.h>
69 #include <vm/vm_pager.h>
71 #include <machine/armreg.h>
72 #include <machine/cpu.h>
73 #include <machine/debug_monitor.h>
74 #include <machine/kdb.h>
75 #include <machine/machdep.h>
76 #include <machine/metadata.h>
77 #include <machine/md_var.h>
78 #include <machine/pcb.h>
79 #include <machine/reg.h>
80 #include <machine/undefined.h>
81 #include <machine/vmparam.h>
83 #include <arm/include/physmem.h>
86 #include <machine/vfp.h>
90 #include <contrib/dev/acpica/include/acpi.h>
91 #include <machine/acpica_machdep.h>
95 #include <dev/fdt/fdt_common.h>
96 #include <dev/ofw/openfirm.h>
100 enum arm64_bus arm64_bus_method = ARM64_BUS_NONE;
102 struct pcpu __pcpu[MAXCPU];
104 static struct trapframe proc0_tf;
109 struct kva_md_info kmi;
111 int64_t dcache_line_size; /* The minimum D cache line size */
112 int64_t icache_line_size; /* The minimum I cache line size */
113 int64_t idcache_line_size; /* The minimum cache line size */
114 int64_t dczva_line_size; /* The size of cache line the dc zva zeroes */
118 * Physical address of the EFI System Table. Stashed from the metadata hints
119 * passed into the kernel and used by the EFI code to call runtime services.
121 vm_paddr_t efi_systbl_phys;
123 /* pagezero_* implementations are provided in support.S */
124 void pagezero_simple(void *);
125 void pagezero_cache(void *);
127 /* pagezero_simple is default pagezero */
128 void (*pagezero)(void *p) = pagezero_simple;
133 uint64_t id_aa64mfr1;
135 id_aa64mfr1 = READ_SPECIALREG(id_aa64mmfr1_el1);
136 if (ID_AA64MMFR1_PAN(id_aa64mfr1) != ID_AA64MMFR1_PAN_NONE)
145 * The LLVM integrated assembler doesn't understand the PAN
146 * PSTATE field. Because of this we need to manually create
147 * the instruction in an asm block. This is equivalent to:
150 * This sets the PAN bit, stopping the kernel from accessing
151 * memory when userspace can also access it unless the kernel
152 * uses the userspace load/store instructions.
155 WRITE_SPECIALREG(sctlr_el1,
156 READ_SPECIALREG(sctlr_el1) & ~SCTLR_SPAN);
157 __asm __volatile(".inst 0xd500409f | (0x1 << 8)");
162 cpu_startup(void *dummy)
167 install_cpu_errata();
169 vm_ksubmap_init(&kmi);
171 vm_pager_bufferinit();
174 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
177 cpu_idle_wakeup(int cpu)
184 fill_regs(struct thread *td, struct reg *regs)
186 struct trapframe *frame;
188 frame = td->td_frame;
189 regs->sp = frame->tf_sp;
190 regs->lr = frame->tf_lr;
191 regs->elr = frame->tf_elr;
192 regs->spsr = frame->tf_spsr;
194 memcpy(regs->x, frame->tf_x, sizeof(regs->x));
200 set_regs(struct thread *td, struct reg *regs)
202 struct trapframe *frame;
204 frame = td->td_frame;
205 frame->tf_sp = regs->sp;
206 frame->tf_lr = regs->lr;
207 frame->tf_elr = regs->elr;
208 frame->tf_spsr &= ~PSR_FLAGS;
209 frame->tf_spsr |= regs->spsr & PSR_FLAGS;
211 memcpy(frame->tf_x, regs->x, sizeof(frame->tf_x));
217 fill_fpregs(struct thread *td, struct fpreg *regs)
223 if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
225 * If we have just been running VFP instructions we will
226 * need to save the state to memcpy it below.
229 vfp_save_state(td, pcb);
231 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
232 ("Called fill_fpregs while the kernel is using the VFP"));
233 memcpy(regs->fp_q, pcb->pcb_fpustate.vfp_regs,
235 regs->fp_cr = pcb->pcb_fpustate.vfp_fpcr;
236 regs->fp_sr = pcb->pcb_fpustate.vfp_fpsr;
239 memset(regs, 0, sizeof(*regs));
244 set_fpregs(struct thread *td, struct fpreg *regs)
250 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
251 ("Called set_fpregs while the kernel is using the VFP"));
252 memcpy(pcb->pcb_fpustate.vfp_regs, regs->fp_q, sizeof(regs->fp_q));
253 pcb->pcb_fpustate.vfp_fpcr = regs->fp_cr;
254 pcb->pcb_fpustate.vfp_fpsr = regs->fp_sr;
260 fill_dbregs(struct thread *td, struct dbreg *regs)
263 printf("ARM64TODO: fill_dbregs");
268 set_dbregs(struct thread *td, struct dbreg *regs)
271 printf("ARM64TODO: set_dbregs");
275 #ifdef COMPAT_FREEBSD32
277 fill_regs32(struct thread *td, struct reg32 *regs)
280 struct trapframe *tf;
283 for (i = 0; i < 13; i++)
284 regs->r[i] = tf->tf_x[i];
285 regs->r_sp = tf->tf_sp;
286 regs->r_lr = tf->tf_lr;
287 regs->r_pc = tf->tf_elr;
288 regs->r_cpsr = tf->tf_spsr;
294 set_regs32(struct thread *td, struct reg32 *regs)
297 struct trapframe *tf;
300 for (i = 0; i < 13; i++)
301 tf->tf_x[i] = regs->r[i];
302 tf->tf_sp = regs->r_sp;
303 tf->tf_lr = regs->r_lr;
304 tf->tf_elr = regs->r_pc;
305 tf->tf_spsr = regs->r_cpsr;
312 fill_fpregs32(struct thread *td, struct fpreg32 *regs)
315 printf("ARM64TODO: fill_fpregs32");
320 set_fpregs32(struct thread *td, struct fpreg32 *regs)
323 printf("ARM64TODO: set_fpregs32");
328 fill_dbregs32(struct thread *td, struct dbreg32 *regs)
331 printf("ARM64TODO: fill_dbregs32");
336 set_dbregs32(struct thread *td, struct dbreg32 *regs)
339 printf("ARM64TODO: set_dbregs32");
345 ptrace_set_pc(struct thread *td, u_long addr)
348 printf("ARM64TODO: ptrace_set_pc");
353 ptrace_single_step(struct thread *td)
356 td->td_frame->tf_spsr |= PSR_SS;
357 td->td_pcb->pcb_flags |= PCB_SINGLE_STEP;
362 ptrace_clear_single_step(struct thread *td)
365 td->td_frame->tf_spsr &= ~PSR_SS;
366 td->td_pcb->pcb_flags &= ~PCB_SINGLE_STEP;
371 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
373 struct trapframe *tf = td->td_frame;
375 memset(tf, 0, sizeof(struct trapframe));
378 tf->tf_sp = STACKALIGN(stack);
379 tf->tf_lr = imgp->entry_addr;
380 tf->tf_elr = imgp->entry_addr;
383 /* Sanity check these are the same size, they will be memcpy'd to and fro */
384 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
385 sizeof((struct gpregs *)0)->gp_x);
386 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
387 sizeof((struct reg *)0)->x);
390 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
392 struct trapframe *tf = td->td_frame;
394 if (clear_ret & GET_MC_CLEAR_RET) {
395 mcp->mc_gpregs.gp_x[0] = 0;
396 mcp->mc_gpregs.gp_spsr = tf->tf_spsr & ~PSR_C;
398 mcp->mc_gpregs.gp_x[0] = tf->tf_x[0];
399 mcp->mc_gpregs.gp_spsr = tf->tf_spsr;
402 memcpy(&mcp->mc_gpregs.gp_x[1], &tf->tf_x[1],
403 sizeof(mcp->mc_gpregs.gp_x[1]) * (nitems(mcp->mc_gpregs.gp_x) - 1));
405 mcp->mc_gpregs.gp_sp = tf->tf_sp;
406 mcp->mc_gpregs.gp_lr = tf->tf_lr;
407 mcp->mc_gpregs.gp_elr = tf->tf_elr;
413 set_mcontext(struct thread *td, mcontext_t *mcp)
415 struct trapframe *tf = td->td_frame;
418 spsr = mcp->mc_gpregs.gp_spsr;
419 if ((spsr & PSR_M_MASK) != PSR_M_EL0t ||
420 (spsr & (PSR_AARCH32 | PSR_F | PSR_I | PSR_A | PSR_D)) != 0)
423 memcpy(tf->tf_x, mcp->mc_gpregs.gp_x, sizeof(tf->tf_x));
425 tf->tf_sp = mcp->mc_gpregs.gp_sp;
426 tf->tf_lr = mcp->mc_gpregs.gp_lr;
427 tf->tf_elr = mcp->mc_gpregs.gp_elr;
428 tf->tf_spsr = mcp->mc_gpregs.gp_spsr;
434 get_fpcontext(struct thread *td, mcontext_t *mcp)
441 curpcb = curthread->td_pcb;
443 if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
445 * If we have just been running VFP instructions we will
446 * need to save the state to memcpy it below.
448 vfp_save_state(td, curpcb);
450 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
451 ("Called get_fpcontext while the kernel is using the VFP"));
452 KASSERT((curpcb->pcb_fpflags & ~PCB_FP_USERMASK) == 0,
453 ("Non-userspace FPU flags set in get_fpcontext"));
454 memcpy(mcp->mc_fpregs.fp_q, curpcb->pcb_fpustate.vfp_regs,
455 sizeof(mcp->mc_fpregs));
456 mcp->mc_fpregs.fp_cr = curpcb->pcb_fpustate.vfp_fpcr;
457 mcp->mc_fpregs.fp_sr = curpcb->pcb_fpustate.vfp_fpsr;
458 mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags;
459 mcp->mc_flags |= _MC_FP_VALID;
467 set_fpcontext(struct thread *td, mcontext_t *mcp)
474 if ((mcp->mc_flags & _MC_FP_VALID) != 0) {
475 curpcb = curthread->td_pcb;
478 * Discard any vfp state for the current thread, we
479 * are about to override it.
483 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
484 ("Called set_fpcontext while the kernel is using the VFP"));
485 memcpy(curpcb->pcb_fpustate.vfp_regs, mcp->mc_fpregs.fp_q,
486 sizeof(mcp->mc_fpregs));
487 curpcb->pcb_fpustate.vfp_fpcr = mcp->mc_fpregs.fp_cr;
488 curpcb->pcb_fpustate.vfp_fpsr = mcp->mc_fpregs.fp_sr;
489 curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags & PCB_FP_USERMASK;
503 if (!sched_runnable())
516 /* We should have shutdown by now, if not enter a low power sleep */
519 __asm __volatile("wfi");
524 * Flush the D-cache for non-DMA I/O so that the I-cache can
525 * be made coherent later.
528 cpu_flush_dcache(void *ptr, size_t len)
534 /* Get current clock frequency for the given CPU ID. */
536 cpu_est_clockrate(int cpu_id, uint64_t *rate)
540 pc = pcpu_find(cpu_id);
541 if (pc == NULL || rate == NULL)
544 if (pc->pc_clock == 0)
547 *rate = pc->pc_clock;
552 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
555 pcpu->pc_acpi_id = 0xffffffff;
565 if (td->td_md.md_spinlock_count == 0) {
566 daif = intr_disable();
567 td->td_md.md_spinlock_count = 1;
568 td->td_md.md_saved_daif = daif;
570 td->td_md.md_spinlock_count++;
582 daif = td->td_md.md_saved_daif;
583 td->td_md.md_spinlock_count--;
584 if (td->td_md.md_spinlock_count == 0)
588 #ifndef _SYS_SYSPROTO_H_
589 struct sigreturn_args {
595 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
602 if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
605 error = set_mcontext(td, &uc.uc_mcontext);
608 set_fpcontext(td, &uc.uc_mcontext);
610 /* Restore signal mask. */
611 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
613 return (EJUSTRETURN);
617 * Construct a PCB from a trapframe. This is called from kdb_trap() where
618 * we want to start a backtrace from the function that caused us to enter
619 * the debugger. We have the context in the trapframe, but base the trace
620 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
621 * enough for a backtrace.
624 makectx(struct trapframe *tf, struct pcb *pcb)
628 for (i = 0; i < PCB_LR; i++)
629 pcb->pcb_x[i] = tf->tf_x[i];
631 pcb->pcb_x[PCB_LR] = tf->tf_lr;
632 pcb->pcb_pc = tf->tf_elr;
633 pcb->pcb_sp = tf->tf_sp;
637 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
641 struct trapframe *tf;
642 struct sigframe *fp, frame;
644 struct sysentvec *sysent;
649 PROC_LOCK_ASSERT(p, MA_OWNED);
651 sig = ksi->ksi_signo;
653 mtx_assert(&psp->ps_mtx, MA_OWNED);
656 onstack = sigonstack(tf->tf_sp);
658 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
661 /* Allocate and validate space for the signal handler context. */
662 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack &&
663 SIGISMEMBER(psp->ps_sigonstack, sig)) {
664 fp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp +
665 td->td_sigstk.ss_size);
666 #if defined(COMPAT_43)
667 td->td_sigstk.ss_flags |= SS_ONSTACK;
670 fp = (struct sigframe *)td->td_frame->tf_sp;
673 /* Make room, keeping the stack aligned */
675 fp = (struct sigframe *)STACKALIGN(fp);
677 /* Fill in the frame to copy out */
678 bzero(&frame, sizeof(frame));
679 get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
680 get_fpcontext(td, &frame.sf_uc.uc_mcontext);
681 frame.sf_si = ksi->ksi_info;
682 frame.sf_uc.uc_sigmask = *mask;
683 frame.sf_uc.uc_stack = td->td_sigstk;
684 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) != 0 ?
685 (onstack ? SS_ONSTACK : 0) : SS_DISABLE;
686 mtx_unlock(&psp->ps_mtx);
687 PROC_UNLOCK(td->td_proc);
689 /* Copy the sigframe out to the user's stack. */
690 if (copyout(&frame, fp, sizeof(*fp)) != 0) {
691 /* Process has trashed its stack. Kill it. */
692 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp);
698 tf->tf_x[1] = (register_t)&fp->sf_si;
699 tf->tf_x[2] = (register_t)&fp->sf_uc;
701 tf->tf_elr = (register_t)catcher;
702 tf->tf_sp = (register_t)fp;
703 sysent = p->p_sysent;
704 if (sysent->sv_sigcode_base != 0)
705 tf->tf_lr = (register_t)sysent->sv_sigcode_base;
707 tf->tf_lr = (register_t)(sysent->sv_psstrings -
708 *(sysent->sv_szsigcode));
710 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr,
714 mtx_lock(&psp->ps_mtx);
718 init_proc0(vm_offset_t kstack)
720 struct pcpu *pcpup = &__pcpu[0];
722 proc_linkup0(&proc0, &thread0);
723 thread0.td_kstack = kstack;
724 thread0.td_pcb = (struct pcb *)(thread0.td_kstack) - 1;
725 thread0.td_pcb->pcb_fpflags = 0;
726 thread0.td_pcb->pcb_fpusaved = &thread0.td_pcb->pcb_fpustate;
727 thread0.td_pcb->pcb_vfpcpu = UINT_MAX;
728 thread0.td_frame = &proc0_tf;
729 pcpup->pc_curpcb = thread0.td_pcb;
731 /* Set the base address of translation table 0. */
732 thread0.td_proc->p_md.md_l0addr = READ_SPECIALREG(ttbr0_el1);
741 } EFI_MEMORY_DESCRIPTOR;
743 typedef void (*efi_map_entry_cb)(struct efi_md *);
746 foreach_efi_map_entry(struct efi_map_header *efihdr, efi_map_entry_cb cb)
748 struct efi_md *map, *p;
753 * Memory map data provided by UEFI via the GetMemoryMap
756 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
757 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
759 if (efihdr->descriptor_size == 0)
761 ndesc = efihdr->memory_size / efihdr->descriptor_size;
763 for (i = 0, p = map; i < ndesc; i++,
764 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
770 exclude_efi_map_entry(struct efi_md *p)
773 switch (p->md_type) {
774 case EFI_MD_TYPE_CODE:
775 case EFI_MD_TYPE_DATA:
776 case EFI_MD_TYPE_BS_CODE:
777 case EFI_MD_TYPE_BS_DATA:
778 case EFI_MD_TYPE_FREE:
780 * We're allowed to use any entry with these types.
784 arm_physmem_exclude_region(p->md_phys, p->md_pages * PAGE_SIZE,
790 exclude_efi_map_entries(struct efi_map_header *efihdr)
793 foreach_efi_map_entry(efihdr, exclude_efi_map_entry);
797 add_efi_map_entry(struct efi_md *p)
800 switch (p->md_type) {
801 case EFI_MD_TYPE_RT_DATA:
803 * Runtime data will be excluded after the DMAP
804 * region is created to stop it from being added
807 case EFI_MD_TYPE_CODE:
808 case EFI_MD_TYPE_DATA:
809 case EFI_MD_TYPE_BS_CODE:
810 case EFI_MD_TYPE_BS_DATA:
811 case EFI_MD_TYPE_FREE:
813 * We're allowed to use any entry with these types.
815 arm_physmem_hardware_region(p->md_phys,
816 p->md_pages * PAGE_SIZE);
822 add_efi_map_entries(struct efi_map_header *efihdr)
825 foreach_efi_map_entry(efihdr, add_efi_map_entry);
829 print_efi_map_entry(struct efi_md *p)
832 static const char *types[] = {
838 "RuntimeServicesCode",
839 "RuntimeServicesData",
840 "ConventionalMemory",
845 "MemoryMappedIOPortSpace",
850 if (p->md_type < nitems(types))
851 type = types[p->md_type];
854 printf("%23s %012lx %12p %08lx ", type, p->md_phys,
855 p->md_virt, p->md_pages);
856 if (p->md_attr & EFI_MD_ATTR_UC)
858 if (p->md_attr & EFI_MD_ATTR_WC)
860 if (p->md_attr & EFI_MD_ATTR_WT)
862 if (p->md_attr & EFI_MD_ATTR_WB)
864 if (p->md_attr & EFI_MD_ATTR_UCE)
866 if (p->md_attr & EFI_MD_ATTR_WP)
868 if (p->md_attr & EFI_MD_ATTR_RP)
870 if (p->md_attr & EFI_MD_ATTR_XP)
872 if (p->md_attr & EFI_MD_ATTR_NV)
874 if (p->md_attr & EFI_MD_ATTR_MORE_RELIABLE)
875 printf("MORE_RELIABLE ");
876 if (p->md_attr & EFI_MD_ATTR_RO)
878 if (p->md_attr & EFI_MD_ATTR_RT)
884 print_efi_map_entries(struct efi_map_header *efihdr)
887 printf("%23s %12s %12s %8s %4s\n",
888 "Type", "Physical", "Virtual", "#Pages", "Attr");
889 foreach_efi_map_entry(efihdr, print_efi_map_entry);
894 try_load_dtb(caddr_t kmdp)
898 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
899 if (dtbp == (vm_offset_t)NULL) {
900 printf("ERROR loading DTB\n");
904 if (OF_install(OFW_FDT, 0) == FALSE)
905 panic("Cannot install FDT");
907 if (OF_init((void *)dtbp) != 0)
908 panic("OF_init failed with the found device tree");
915 bool has_acpi, has_fdt;
918 has_acpi = has_fdt = false;
921 has_fdt = (OF_peer(0) != 0);
924 has_acpi = (acpi_find_table(ACPI_SIG_SPCR) != 0);
927 env = kern_getenv("kern.cfg.order");
930 while (order != NULL) {
932 strncmp(order, "acpi", 4) == 0 &&
933 (order[4] == ',' || order[4] == '\0')) {
934 arm64_bus_method = ARM64_BUS_ACPI;
938 strncmp(order, "fdt", 3) == 0 &&
939 (order[3] == ',' || order[3] == '\0')) {
940 arm64_bus_method = ARM64_BUS_FDT;
943 order = strchr(order, ',');
947 /* If we set the bus method it is valid */
948 if (arm64_bus_method != ARM64_BUS_NONE)
951 /* If no order or an invalid order was set use the default */
952 if (arm64_bus_method == ARM64_BUS_NONE) {
954 arm64_bus_method = ARM64_BUS_FDT;
956 arm64_bus_method = ARM64_BUS_ACPI;
960 * If no option was set the default is valid, otherwise we are
961 * setting one to get cninit() working, then calling panic to tell
962 * the user about the invalid bus setup.
964 return (env == NULL);
970 int dcache_line_shift, icache_line_shift, dczva_line_shift;
974 ctr_el0 = READ_SPECIALREG(ctr_el0);
976 /* Read the log2 words in each D cache line */
977 dcache_line_shift = CTR_DLINE_SIZE(ctr_el0);
978 /* Get the D cache line size */
979 dcache_line_size = sizeof(int) << dcache_line_shift;
981 /* And the same for the I cache */
982 icache_line_shift = CTR_ILINE_SIZE(ctr_el0);
983 icache_line_size = sizeof(int) << icache_line_shift;
985 idcache_line_size = MIN(dcache_line_size, icache_line_size);
987 dczid_el0 = READ_SPECIALREG(dczid_el0);
989 /* Check if dc zva is not prohibited */
990 if (dczid_el0 & DCZID_DZP)
993 /* Same as with above calculations */
994 dczva_line_shift = DCZID_BS_SIZE(dczid_el0);
995 dczva_line_size = sizeof(int) << dczva_line_shift;
997 /* Change pagezero function */
998 pagezero = pagezero_cache;
1003 initarm(struct arm64_bootparams *abp)
1005 struct efi_fb *efifb;
1006 struct efi_map_header *efihdr;
1010 struct mem_region mem_regions[FDT_MEM_REGIONS];
1013 vm_offset_t lastaddr;
1017 /* Set the module data location */
1018 preload_metadata = (caddr_t)(uintptr_t)(abp->modulep);
1020 /* Find the kernel address */
1021 kmdp = preload_search_by_type("elf kernel");
1023 kmdp = preload_search_by_type("elf64 kernel");
1025 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
1026 init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 0);
1027 link_elf_ireloc(kmdp);
1033 efi_systbl_phys = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t);
1035 /* Find the address to start allocating from */
1036 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
1038 /* Load the physical memory ranges */
1039 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
1040 MODINFO_METADATA | MODINFOMD_EFI_MAP);
1042 add_efi_map_entries(efihdr);
1045 /* Grab physical memory regions information from device tree. */
1046 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,
1048 panic("Cannot get physical memory regions");
1049 arm_physmem_hardware_regions(mem_regions, mem_regions_sz);
1051 if (fdt_get_reserved_mem(mem_regions, &mem_regions_sz) == 0)
1052 arm_physmem_exclude_regions(mem_regions, mem_regions_sz,
1053 EXFLAG_NODUMP | EXFLAG_NOALLOC);
1056 /* Exclude the EFI framebuffer from our view of physical memory. */
1057 efifb = (struct efi_fb *)preload_search_info(kmdp,
1058 MODINFO_METADATA | MODINFOMD_EFI_FB);
1060 arm_physmem_exclude_region(efifb->fb_addr, efifb->fb_size,
1063 /* Set the pcpu data, this is needed by pmap_bootstrap */
1065 pcpu_init(pcpup, 0, sizeof(struct pcpu));
1068 * Set the pcpu pointer with a backup in tpidr_el1 to be
1069 * loaded when entering the kernel from userland.
1073 "msr tpidr_el1, %0" :: "r"(pcpup));
1075 PCPU_SET(curthread, &thread0);
1077 /* Do basic tuning, hz etc */
1083 /* Bootstrap enough of pmap to enter the kernel proper */
1084 pmap_bootstrap(abp->kern_l0pt, abp->kern_l1pt,
1085 KERNBASE - abp->kern_delta, lastaddr - KERNBASE);
1086 /* Exclude entries neexed in teh DMAP region, but not phys_avail */
1088 exclude_efi_map_entries(efihdr);
1089 arm_physmem_init_kernel_globals();
1091 devmap_bootstrap(0, NULL);
1093 valid = bus_probe();
1098 panic("Invalid bus configuration: %s",
1099 kern_getenv("kern.cfg.order"));
1101 init_proc0(abp->kern_stack);
1102 msgbufinit(msgbufp, msgbufsize);
1104 init_param2(physmem);
1110 env = kern_getenv("kernelname");
1112 strlcpy(kernelname, env, sizeof(kernelname));
1114 if (boothowto & RB_VERBOSE) {
1115 print_efi_map_entries(efihdr);
1116 arm_physmem_print_tables();
1127 WRITE_SPECIALREG(OSLAR_EL1, 0);
1129 /* This permits DDB to use debug registers for watchpoints. */
1132 /* TODO: Eventually will need to initialize debug registers here. */
1136 #include <ddb/ddb.h>
1138 DB_SHOW_COMMAND(specialregs, db_show_spregs)
1140 #define PRINT_REG(reg) \
1141 db_printf(__STRING(reg) " = %#016lx\n", READ_SPECIALREG(reg))
1143 PRINT_REG(actlr_el1);
1144 PRINT_REG(afsr0_el1);
1145 PRINT_REG(afsr1_el1);
1146 PRINT_REG(aidr_el1);
1147 PRINT_REG(amair_el1);
1148 PRINT_REG(ccsidr_el1);
1149 PRINT_REG(clidr_el1);
1150 PRINT_REG(contextidr_el1);
1151 PRINT_REG(cpacr_el1);
1152 PRINT_REG(csselr_el1);
1154 PRINT_REG(currentel);
1156 PRINT_REG(dczid_el0);
1161 /* ARM64TODO: Enable VFP before reading floating-point registers */
1165 PRINT_REG(id_aa64afr0_el1);
1166 PRINT_REG(id_aa64afr1_el1);
1167 PRINT_REG(id_aa64dfr0_el1);
1168 PRINT_REG(id_aa64dfr1_el1);
1169 PRINT_REG(id_aa64isar0_el1);
1170 PRINT_REG(id_aa64isar1_el1);
1171 PRINT_REG(id_aa64pfr0_el1);
1172 PRINT_REG(id_aa64pfr1_el1);
1173 PRINT_REG(id_afr0_el1);
1174 PRINT_REG(id_dfr0_el1);
1175 PRINT_REG(id_isar0_el1);
1176 PRINT_REG(id_isar1_el1);
1177 PRINT_REG(id_isar2_el1);
1178 PRINT_REG(id_isar3_el1);
1179 PRINT_REG(id_isar4_el1);
1180 PRINT_REG(id_isar5_el1);
1181 PRINT_REG(id_mmfr0_el1);
1182 PRINT_REG(id_mmfr1_el1);
1183 PRINT_REG(id_mmfr2_el1);
1184 PRINT_REG(id_mmfr3_el1);
1186 /* Missing from llvm */
1187 PRINT_REG(id_mmfr4_el1);
1189 PRINT_REG(id_pfr0_el1);
1190 PRINT_REG(id_pfr1_el1);
1192 PRINT_REG(mair_el1);
1193 PRINT_REG(midr_el1);
1194 PRINT_REG(mpidr_el1);
1195 PRINT_REG(mvfr0_el1);
1196 PRINT_REG(mvfr1_el1);
1197 PRINT_REG(mvfr2_el1);
1198 PRINT_REG(revidr_el1);
1199 PRINT_REG(sctlr_el1);
1202 PRINT_REG(spsr_el1);
1204 PRINT_REG(tpidr_el0);
1205 PRINT_REG(tpidr_el1);
1206 PRINT_REG(tpidrro_el0);
1207 PRINT_REG(ttbr0_el1);
1208 PRINT_REG(ttbr1_el1);
1209 PRINT_REG(vbar_el1);
1213 DB_SHOW_COMMAND(vtop, db_show_vtop)
1218 phys = arm64_address_translate_s1e1r(addr);
1219 db_printf("EL1 physical address reg (read): 0x%016lx\n", phys);
1220 phys = arm64_address_translate_s1e1w(addr);
1221 db_printf("EL1 physical address reg (write): 0x%016lx\n", phys);
1222 phys = arm64_address_translate_s1e0r(addr);
1223 db_printf("EL0 physical address reg (read): 0x%016lx\n", phys);
1224 phys = arm64_address_translate_s1e0w(addr);
1225 db_printf("EL0 physical address reg (write): 0x%016lx\n", phys);
1227 db_printf("show vtop <virt_addr>\n");