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>
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>
84 #include <arm/include/physmem.h>
87 #include <machine/vfp.h>
91 #include <contrib/dev/acpica/include/acpi.h>
92 #include <machine/acpica_machdep.h>
96 #include <dev/fdt/fdt_common.h>
97 #include <dev/ofw/openfirm.h>
101 enum arm64_bus arm64_bus_method = ARM64_BUS_NONE;
103 struct pcpu __pcpu[MAXCPU];
105 static struct trapframe proc0_tf;
110 struct kva_md_info kmi;
112 int64_t dcache_line_size; /* The minimum D cache line size */
113 int64_t icache_line_size; /* The minimum I cache line size */
114 int64_t idcache_line_size; /* The minimum cache line size */
115 int64_t dczva_line_size; /* The size of cache line the dc zva zeroes */
119 * Physical address of the EFI System Table. Stashed from the metadata hints
120 * passed into the kernel and used by the EFI code to call runtime services.
122 vm_paddr_t efi_systbl_phys;
124 /* pagezero_* implementations are provided in support.S */
125 void pagezero_simple(void *);
126 void pagezero_cache(void *);
128 /* pagezero_simple is default pagezero */
129 void (*pagezero)(void *p) = pagezero_simple;
134 uint64_t id_aa64mfr1;
136 id_aa64mfr1 = READ_SPECIALREG(id_aa64mmfr1_el1);
137 if (ID_AA64MMFR1_PAN(id_aa64mfr1) != ID_AA64MMFR1_PAN_NONE)
146 * The LLVM integrated assembler doesn't understand the PAN
147 * PSTATE field. Because of this we need to manually create
148 * the instruction in an asm block. This is equivalent to:
151 * This sets the PAN bit, stopping the kernel from accessing
152 * memory when userspace can also access it unless the kernel
153 * uses the userspace load/store instructions.
156 WRITE_SPECIALREG(sctlr_el1,
157 READ_SPECIALREG(sctlr_el1) & ~SCTLR_SPAN);
158 __asm __volatile(".inst 0xd500409f | (0x1 << 8)");
163 cpu_startup(void *dummy)
168 install_cpu_errata();
170 vm_ksubmap_init(&kmi);
172 vm_pager_bufferinit();
175 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
178 cpu_idle_wakeup(int cpu)
185 fill_regs(struct thread *td, struct reg *regs)
187 struct trapframe *frame;
189 frame = td->td_frame;
190 regs->sp = frame->tf_sp;
191 regs->lr = frame->tf_lr;
192 regs->elr = frame->tf_elr;
193 regs->spsr = frame->tf_spsr;
195 memcpy(regs->x, frame->tf_x, sizeof(regs->x));
197 #ifdef COMPAT_FREEBSD32
199 * We may be called here for a 32bits process, if we're using a
200 * 64bits debugger. If so, put PC and SPSR where it expects it.
202 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) {
203 regs->x[15] = frame->tf_elr;
204 regs->x[16] = frame->tf_spsr;
211 set_regs(struct thread *td, struct reg *regs)
213 struct trapframe *frame;
215 frame = td->td_frame;
216 frame->tf_sp = regs->sp;
217 frame->tf_lr = regs->lr;
218 frame->tf_elr = regs->elr;
219 frame->tf_spsr &= ~PSR_FLAGS;
220 frame->tf_spsr |= regs->spsr & PSR_FLAGS;
222 memcpy(frame->tf_x, regs->x, sizeof(frame->tf_x));
224 #ifdef COMPAT_FREEBSD32
225 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) {
227 * We may be called for a 32bits process if we're using
228 * a 64bits debugger. If so, get PC and SPSR from where
231 frame->tf_elr = regs->x[15];
232 frame->tf_spsr = regs->x[16] & PSR_FLAGS;
239 fill_fpregs(struct thread *td, struct fpreg *regs)
245 if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
247 * If we have just been running VFP instructions we will
248 * need to save the state to memcpy it below.
251 vfp_save_state(td, pcb);
253 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
254 ("Called fill_fpregs while the kernel is using the VFP"));
255 memcpy(regs->fp_q, pcb->pcb_fpustate.vfp_regs,
257 regs->fp_cr = pcb->pcb_fpustate.vfp_fpcr;
258 regs->fp_sr = pcb->pcb_fpustate.vfp_fpsr;
261 memset(regs, 0, sizeof(*regs));
266 set_fpregs(struct thread *td, struct fpreg *regs)
272 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
273 ("Called set_fpregs while the kernel is using the VFP"));
274 memcpy(pcb->pcb_fpustate.vfp_regs, regs->fp_q, sizeof(regs->fp_q));
275 pcb->pcb_fpustate.vfp_fpcr = regs->fp_cr;
276 pcb->pcb_fpustate.vfp_fpsr = regs->fp_sr;
282 fill_dbregs(struct thread *td, struct dbreg *regs)
285 printf("ARM64TODO: fill_dbregs");
290 set_dbregs(struct thread *td, struct dbreg *regs)
293 printf("ARM64TODO: set_dbregs");
297 #ifdef COMPAT_FREEBSD32
299 fill_regs32(struct thread *td, struct reg32 *regs)
302 struct trapframe *tf;
305 for (i = 0; i < 13; i++)
306 regs->r[i] = tf->tf_x[i];
307 /* For arm32, SP is r13 and LR is r14 */
308 regs->r_sp = tf->tf_x[13];
309 regs->r_lr = tf->tf_x[14];
310 regs->r_pc = tf->tf_elr;
311 regs->r_cpsr = tf->tf_spsr;
317 set_regs32(struct thread *td, struct reg32 *regs)
320 struct trapframe *tf;
323 for (i = 0; i < 13; i++)
324 tf->tf_x[i] = regs->r[i];
325 /* For arm 32, SP is r13 an LR is r14 */
326 tf->tf_x[13] = regs->r_sp;
327 tf->tf_x[14] = regs->r_lr;
328 tf->tf_elr = regs->r_pc;
329 tf->tf_spsr = regs->r_cpsr;
336 fill_fpregs32(struct thread *td, struct fpreg32 *regs)
339 printf("ARM64TODO: fill_fpregs32");
344 set_fpregs32(struct thread *td, struct fpreg32 *regs)
347 printf("ARM64TODO: set_fpregs32");
352 fill_dbregs32(struct thread *td, struct dbreg32 *regs)
355 printf("ARM64TODO: fill_dbregs32");
360 set_dbregs32(struct thread *td, struct dbreg32 *regs)
363 printf("ARM64TODO: set_dbregs32");
369 ptrace_set_pc(struct thread *td, u_long addr)
372 printf("ARM64TODO: ptrace_set_pc");
377 ptrace_single_step(struct thread *td)
380 td->td_frame->tf_spsr |= PSR_SS;
381 td->td_pcb->pcb_flags |= PCB_SINGLE_STEP;
386 ptrace_clear_single_step(struct thread *td)
389 td->td_frame->tf_spsr &= ~PSR_SS;
390 td->td_pcb->pcb_flags &= ~PCB_SINGLE_STEP;
395 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
397 struct trapframe *tf = td->td_frame;
399 memset(tf, 0, sizeof(struct trapframe));
402 tf->tf_sp = STACKALIGN(stack);
403 tf->tf_lr = imgp->entry_addr;
404 tf->tf_elr = imgp->entry_addr;
407 /* Sanity check these are the same size, they will be memcpy'd to and fro */
408 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
409 sizeof((struct gpregs *)0)->gp_x);
410 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
411 sizeof((struct reg *)0)->x);
414 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
416 struct trapframe *tf = td->td_frame;
418 if (clear_ret & GET_MC_CLEAR_RET) {
419 mcp->mc_gpregs.gp_x[0] = 0;
420 mcp->mc_gpregs.gp_spsr = tf->tf_spsr & ~PSR_C;
422 mcp->mc_gpregs.gp_x[0] = tf->tf_x[0];
423 mcp->mc_gpregs.gp_spsr = tf->tf_spsr;
426 memcpy(&mcp->mc_gpregs.gp_x[1], &tf->tf_x[1],
427 sizeof(mcp->mc_gpregs.gp_x[1]) * (nitems(mcp->mc_gpregs.gp_x) - 1));
429 mcp->mc_gpregs.gp_sp = tf->tf_sp;
430 mcp->mc_gpregs.gp_lr = tf->tf_lr;
431 mcp->mc_gpregs.gp_elr = tf->tf_elr;
437 set_mcontext(struct thread *td, mcontext_t *mcp)
439 struct trapframe *tf = td->td_frame;
442 spsr = mcp->mc_gpregs.gp_spsr;
443 if ((spsr & PSR_M_MASK) != PSR_M_EL0t ||
444 (spsr & (PSR_AARCH32 | PSR_F | PSR_I | PSR_A | PSR_D)) != 0)
447 memcpy(tf->tf_x, mcp->mc_gpregs.gp_x, sizeof(tf->tf_x));
449 tf->tf_sp = mcp->mc_gpregs.gp_sp;
450 tf->tf_lr = mcp->mc_gpregs.gp_lr;
451 tf->tf_elr = mcp->mc_gpregs.gp_elr;
452 tf->tf_spsr = mcp->mc_gpregs.gp_spsr;
458 get_fpcontext(struct thread *td, mcontext_t *mcp)
465 curpcb = curthread->td_pcb;
467 if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
469 * If we have just been running VFP instructions we will
470 * need to save the state to memcpy it below.
472 vfp_save_state(td, curpcb);
474 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
475 ("Called get_fpcontext while the kernel is using the VFP"));
476 KASSERT((curpcb->pcb_fpflags & ~PCB_FP_USERMASK) == 0,
477 ("Non-userspace FPU flags set in get_fpcontext"));
478 memcpy(mcp->mc_fpregs.fp_q, curpcb->pcb_fpustate.vfp_regs,
479 sizeof(mcp->mc_fpregs));
480 mcp->mc_fpregs.fp_cr = curpcb->pcb_fpustate.vfp_fpcr;
481 mcp->mc_fpregs.fp_sr = curpcb->pcb_fpustate.vfp_fpsr;
482 mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags;
483 mcp->mc_flags |= _MC_FP_VALID;
491 set_fpcontext(struct thread *td, mcontext_t *mcp)
498 if ((mcp->mc_flags & _MC_FP_VALID) != 0) {
499 curpcb = curthread->td_pcb;
502 * Discard any vfp state for the current thread, we
503 * are about to override it.
507 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
508 ("Called set_fpcontext while the kernel is using the VFP"));
509 memcpy(curpcb->pcb_fpustate.vfp_regs, mcp->mc_fpregs.fp_q,
510 sizeof(mcp->mc_fpregs));
511 curpcb->pcb_fpustate.vfp_fpcr = mcp->mc_fpregs.fp_cr;
512 curpcb->pcb_fpustate.vfp_fpsr = mcp->mc_fpregs.fp_sr;
513 curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags & PCB_FP_USERMASK;
527 if (!sched_runnable())
540 /* We should have shutdown by now, if not enter a low power sleep */
543 __asm __volatile("wfi");
548 * Flush the D-cache for non-DMA I/O so that the I-cache can
549 * be made coherent later.
552 cpu_flush_dcache(void *ptr, size_t len)
558 /* Get current clock frequency for the given CPU ID. */
560 cpu_est_clockrate(int cpu_id, uint64_t *rate)
564 pc = pcpu_find(cpu_id);
565 if (pc == NULL || rate == NULL)
568 if (pc->pc_clock == 0)
571 *rate = pc->pc_clock;
576 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
579 pcpu->pc_acpi_id = 0xffffffff;
589 if (td->td_md.md_spinlock_count == 0) {
590 daif = intr_disable();
591 td->td_md.md_spinlock_count = 1;
592 td->td_md.md_saved_daif = daif;
594 td->td_md.md_spinlock_count++;
606 daif = td->td_md.md_saved_daif;
607 td->td_md.md_spinlock_count--;
608 if (td->td_md.md_spinlock_count == 0)
612 #ifndef _SYS_SYSPROTO_H_
613 struct sigreturn_args {
619 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
626 if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
629 error = set_mcontext(td, &uc.uc_mcontext);
632 set_fpcontext(td, &uc.uc_mcontext);
634 /* Restore signal mask. */
635 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
637 return (EJUSTRETURN);
641 * Construct a PCB from a trapframe. This is called from kdb_trap() where
642 * we want to start a backtrace from the function that caused us to enter
643 * the debugger. We have the context in the trapframe, but base the trace
644 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
645 * enough for a backtrace.
648 makectx(struct trapframe *tf, struct pcb *pcb)
652 for (i = 0; i < PCB_LR; i++)
653 pcb->pcb_x[i] = tf->tf_x[i];
655 pcb->pcb_x[PCB_LR] = tf->tf_lr;
656 pcb->pcb_pc = tf->tf_elr;
657 pcb->pcb_sp = tf->tf_sp;
661 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
665 struct trapframe *tf;
666 struct sigframe *fp, frame;
668 struct sysentvec *sysent;
673 PROC_LOCK_ASSERT(p, MA_OWNED);
675 sig = ksi->ksi_signo;
677 mtx_assert(&psp->ps_mtx, MA_OWNED);
680 onstack = sigonstack(tf->tf_sp);
682 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
685 /* Allocate and validate space for the signal handler context. */
686 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack &&
687 SIGISMEMBER(psp->ps_sigonstack, sig)) {
688 fp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp +
689 td->td_sigstk.ss_size);
690 #if defined(COMPAT_43)
691 td->td_sigstk.ss_flags |= SS_ONSTACK;
694 fp = (struct sigframe *)td->td_frame->tf_sp;
697 /* Make room, keeping the stack aligned */
699 fp = (struct sigframe *)STACKALIGN(fp);
701 /* Fill in the frame to copy out */
702 bzero(&frame, sizeof(frame));
703 get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
704 get_fpcontext(td, &frame.sf_uc.uc_mcontext);
705 frame.sf_si = ksi->ksi_info;
706 frame.sf_uc.uc_sigmask = *mask;
707 frame.sf_uc.uc_stack = td->td_sigstk;
708 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) != 0 ?
709 (onstack ? SS_ONSTACK : 0) : SS_DISABLE;
710 mtx_unlock(&psp->ps_mtx);
711 PROC_UNLOCK(td->td_proc);
713 /* Copy the sigframe out to the user's stack. */
714 if (copyout(&frame, fp, sizeof(*fp)) != 0) {
715 /* Process has trashed its stack. Kill it. */
716 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp);
722 tf->tf_x[1] = (register_t)&fp->sf_si;
723 tf->tf_x[2] = (register_t)&fp->sf_uc;
725 tf->tf_elr = (register_t)catcher;
726 tf->tf_sp = (register_t)fp;
727 sysent = p->p_sysent;
728 if (sysent->sv_sigcode_base != 0)
729 tf->tf_lr = (register_t)sysent->sv_sigcode_base;
731 tf->tf_lr = (register_t)(sysent->sv_psstrings -
732 *(sysent->sv_szsigcode));
734 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr,
738 mtx_lock(&psp->ps_mtx);
742 init_proc0(vm_offset_t kstack)
744 struct pcpu *pcpup = &__pcpu[0];
746 proc_linkup0(&proc0, &thread0);
747 thread0.td_kstack = kstack;
748 thread0.td_pcb = (struct pcb *)(thread0.td_kstack) - 1;
749 thread0.td_pcb->pcb_fpflags = 0;
750 thread0.td_pcb->pcb_fpusaved = &thread0.td_pcb->pcb_fpustate;
751 thread0.td_pcb->pcb_vfpcpu = UINT_MAX;
752 thread0.td_frame = &proc0_tf;
753 pcpup->pc_curpcb = thread0.td_pcb;
755 /* Set the base address of translation table 0. */
756 thread0.td_proc->p_md.md_l0addr = READ_SPECIALREG(ttbr0_el1);
765 } EFI_MEMORY_DESCRIPTOR;
767 typedef void (*efi_map_entry_cb)(struct efi_md *);
770 foreach_efi_map_entry(struct efi_map_header *efihdr, efi_map_entry_cb cb)
772 struct efi_md *map, *p;
777 * Memory map data provided by UEFI via the GetMemoryMap
780 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
781 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
783 if (efihdr->descriptor_size == 0)
785 ndesc = efihdr->memory_size / efihdr->descriptor_size;
787 for (i = 0, p = map; i < ndesc; i++,
788 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
794 exclude_efi_map_entry(struct efi_md *p)
797 switch (p->md_type) {
798 case EFI_MD_TYPE_CODE:
799 case EFI_MD_TYPE_DATA:
800 case EFI_MD_TYPE_BS_CODE:
801 case EFI_MD_TYPE_BS_DATA:
802 case EFI_MD_TYPE_FREE:
804 * We're allowed to use any entry with these types.
808 arm_physmem_exclude_region(p->md_phys, p->md_pages * PAGE_SIZE,
814 exclude_efi_map_entries(struct efi_map_header *efihdr)
817 foreach_efi_map_entry(efihdr, exclude_efi_map_entry);
821 add_efi_map_entry(struct efi_md *p)
824 switch (p->md_type) {
825 case EFI_MD_TYPE_RT_DATA:
827 * Runtime data will be excluded after the DMAP
828 * region is created to stop it from being added
831 case EFI_MD_TYPE_CODE:
832 case EFI_MD_TYPE_DATA:
833 case EFI_MD_TYPE_BS_CODE:
834 case EFI_MD_TYPE_BS_DATA:
835 case EFI_MD_TYPE_FREE:
837 * We're allowed to use any entry with these types.
839 arm_physmem_hardware_region(p->md_phys,
840 p->md_pages * PAGE_SIZE);
846 add_efi_map_entries(struct efi_map_header *efihdr)
849 foreach_efi_map_entry(efihdr, add_efi_map_entry);
853 print_efi_map_entry(struct efi_md *p)
856 static const char *types[] = {
862 "RuntimeServicesCode",
863 "RuntimeServicesData",
864 "ConventionalMemory",
869 "MemoryMappedIOPortSpace",
874 if (p->md_type < nitems(types))
875 type = types[p->md_type];
878 printf("%23s %012lx %12p %08lx ", type, p->md_phys,
879 p->md_virt, p->md_pages);
880 if (p->md_attr & EFI_MD_ATTR_UC)
882 if (p->md_attr & EFI_MD_ATTR_WC)
884 if (p->md_attr & EFI_MD_ATTR_WT)
886 if (p->md_attr & EFI_MD_ATTR_WB)
888 if (p->md_attr & EFI_MD_ATTR_UCE)
890 if (p->md_attr & EFI_MD_ATTR_WP)
892 if (p->md_attr & EFI_MD_ATTR_RP)
894 if (p->md_attr & EFI_MD_ATTR_XP)
896 if (p->md_attr & EFI_MD_ATTR_NV)
898 if (p->md_attr & EFI_MD_ATTR_MORE_RELIABLE)
899 printf("MORE_RELIABLE ");
900 if (p->md_attr & EFI_MD_ATTR_RO)
902 if (p->md_attr & EFI_MD_ATTR_RT)
908 print_efi_map_entries(struct efi_map_header *efihdr)
911 printf("%23s %12s %12s %8s %4s\n",
912 "Type", "Physical", "Virtual", "#Pages", "Attr");
913 foreach_efi_map_entry(efihdr, print_efi_map_entry);
918 try_load_dtb(caddr_t kmdp)
922 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
923 if (dtbp == (vm_offset_t)NULL) {
924 printf("ERROR loading DTB\n");
928 if (OF_install(OFW_FDT, 0) == FALSE)
929 panic("Cannot install FDT");
931 if (OF_init((void *)dtbp) != 0)
932 panic("OF_init failed with the found device tree");
939 bool has_acpi, has_fdt;
942 has_acpi = has_fdt = false;
945 has_fdt = (OF_peer(0) != 0);
948 has_acpi = (acpi_find_table(ACPI_SIG_SPCR) != 0);
951 env = kern_getenv("kern.cfg.order");
954 while (order != NULL) {
956 strncmp(order, "acpi", 4) == 0 &&
957 (order[4] == ',' || order[4] == '\0')) {
958 arm64_bus_method = ARM64_BUS_ACPI;
962 strncmp(order, "fdt", 3) == 0 &&
963 (order[3] == ',' || order[3] == '\0')) {
964 arm64_bus_method = ARM64_BUS_FDT;
967 order = strchr(order, ',');
971 /* If we set the bus method it is valid */
972 if (arm64_bus_method != ARM64_BUS_NONE)
975 /* If no order or an invalid order was set use the default */
976 if (arm64_bus_method == ARM64_BUS_NONE) {
978 arm64_bus_method = ARM64_BUS_FDT;
980 arm64_bus_method = ARM64_BUS_ACPI;
984 * If no option was set the default is valid, otherwise we are
985 * setting one to get cninit() working, then calling panic to tell
986 * the user about the invalid bus setup.
988 return (env == NULL);
994 int dcache_line_shift, icache_line_shift, dczva_line_shift;
998 ctr_el0 = READ_SPECIALREG(ctr_el0);
1000 /* Read the log2 words in each D cache line */
1001 dcache_line_shift = CTR_DLINE_SIZE(ctr_el0);
1002 /* Get the D cache line size */
1003 dcache_line_size = sizeof(int) << dcache_line_shift;
1005 /* And the same for the I cache */
1006 icache_line_shift = CTR_ILINE_SIZE(ctr_el0);
1007 icache_line_size = sizeof(int) << icache_line_shift;
1009 idcache_line_size = MIN(dcache_line_size, icache_line_size);
1011 dczid_el0 = READ_SPECIALREG(dczid_el0);
1013 /* Check if dc zva is not prohibited */
1014 if (dczid_el0 & DCZID_DZP)
1015 dczva_line_size = 0;
1017 /* Same as with above calculations */
1018 dczva_line_shift = DCZID_BS_SIZE(dczid_el0);
1019 dczva_line_size = sizeof(int) << dczva_line_shift;
1021 /* Change pagezero function */
1022 pagezero = pagezero_cache;
1027 initarm(struct arm64_bootparams *abp)
1029 struct efi_fb *efifb;
1030 struct efi_map_header *efihdr;
1034 struct mem_region mem_regions[FDT_MEM_REGIONS];
1037 vm_offset_t lastaddr;
1041 /* Set the module data location */
1042 preload_metadata = (caddr_t)(uintptr_t)(abp->modulep);
1044 /* Find the kernel address */
1045 kmdp = preload_search_by_type("elf kernel");
1047 kmdp = preload_search_by_type("elf64 kernel");
1049 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
1050 init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 0);
1051 link_elf_ireloc(kmdp);
1057 efi_systbl_phys = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t);
1059 /* Find the address to start allocating from */
1060 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
1062 /* Load the physical memory ranges */
1063 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
1064 MODINFO_METADATA | MODINFOMD_EFI_MAP);
1066 add_efi_map_entries(efihdr);
1069 /* Grab physical memory regions information from device tree. */
1070 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,
1072 panic("Cannot get physical memory regions");
1073 arm_physmem_hardware_regions(mem_regions, mem_regions_sz);
1075 if (fdt_get_reserved_mem(mem_regions, &mem_regions_sz) == 0)
1076 arm_physmem_exclude_regions(mem_regions, mem_regions_sz,
1077 EXFLAG_NODUMP | EXFLAG_NOALLOC);
1080 /* Exclude the EFI framebuffer from our view of physical memory. */
1081 efifb = (struct efi_fb *)preload_search_info(kmdp,
1082 MODINFO_METADATA | MODINFOMD_EFI_FB);
1084 arm_physmem_exclude_region(efifb->fb_addr, efifb->fb_size,
1087 /* Set the pcpu data, this is needed by pmap_bootstrap */
1089 pcpu_init(pcpup, 0, sizeof(struct pcpu));
1092 * Set the pcpu pointer with a backup in tpidr_el1 to be
1093 * loaded when entering the kernel from userland.
1097 "msr tpidr_el1, %0" :: "r"(pcpup));
1099 PCPU_SET(curthread, &thread0);
1101 /* Do basic tuning, hz etc */
1107 /* Bootstrap enough of pmap to enter the kernel proper */
1108 pmap_bootstrap(abp->kern_l0pt, abp->kern_l1pt,
1109 KERNBASE - abp->kern_delta, lastaddr - KERNBASE);
1110 /* Exclude entries neexed in teh DMAP region, but not phys_avail */
1112 exclude_efi_map_entries(efihdr);
1113 arm_physmem_init_kernel_globals();
1115 devmap_bootstrap(0, NULL);
1117 valid = bus_probe();
1122 panic("Invalid bus configuration: %s",
1123 kern_getenv("kern.cfg.order"));
1125 init_proc0(abp->kern_stack);
1126 msgbufinit(msgbufp, msgbufsize);
1128 init_param2(physmem);
1134 env = kern_getenv("kernelname");
1136 strlcpy(kernelname, env, sizeof(kernelname));
1138 if (boothowto & RB_VERBOSE) {
1139 print_efi_map_entries(efihdr);
1140 arm_physmem_print_tables();
1151 WRITE_SPECIALREG(OSLAR_EL1, 0);
1153 /* This permits DDB to use debug registers for watchpoints. */
1156 /* TODO: Eventually will need to initialize debug registers here. */
1160 #include <ddb/ddb.h>
1162 DB_SHOW_COMMAND(specialregs, db_show_spregs)
1164 #define PRINT_REG(reg) \
1165 db_printf(__STRING(reg) " = %#016lx\n", READ_SPECIALREG(reg))
1167 PRINT_REG(actlr_el1);
1168 PRINT_REG(afsr0_el1);
1169 PRINT_REG(afsr1_el1);
1170 PRINT_REG(aidr_el1);
1171 PRINT_REG(amair_el1);
1172 PRINT_REG(ccsidr_el1);
1173 PRINT_REG(clidr_el1);
1174 PRINT_REG(contextidr_el1);
1175 PRINT_REG(cpacr_el1);
1176 PRINT_REG(csselr_el1);
1178 PRINT_REG(currentel);
1180 PRINT_REG(dczid_el0);
1185 /* ARM64TODO: Enable VFP before reading floating-point registers */
1189 PRINT_REG(id_aa64afr0_el1);
1190 PRINT_REG(id_aa64afr1_el1);
1191 PRINT_REG(id_aa64dfr0_el1);
1192 PRINT_REG(id_aa64dfr1_el1);
1193 PRINT_REG(id_aa64isar0_el1);
1194 PRINT_REG(id_aa64isar1_el1);
1195 PRINT_REG(id_aa64pfr0_el1);
1196 PRINT_REG(id_aa64pfr1_el1);
1197 PRINT_REG(id_afr0_el1);
1198 PRINT_REG(id_dfr0_el1);
1199 PRINT_REG(id_isar0_el1);
1200 PRINT_REG(id_isar1_el1);
1201 PRINT_REG(id_isar2_el1);
1202 PRINT_REG(id_isar3_el1);
1203 PRINT_REG(id_isar4_el1);
1204 PRINT_REG(id_isar5_el1);
1205 PRINT_REG(id_mmfr0_el1);
1206 PRINT_REG(id_mmfr1_el1);
1207 PRINT_REG(id_mmfr2_el1);
1208 PRINT_REG(id_mmfr3_el1);
1210 /* Missing from llvm */
1211 PRINT_REG(id_mmfr4_el1);
1213 PRINT_REG(id_pfr0_el1);
1214 PRINT_REG(id_pfr1_el1);
1216 PRINT_REG(mair_el1);
1217 PRINT_REG(midr_el1);
1218 PRINT_REG(mpidr_el1);
1219 PRINT_REG(mvfr0_el1);
1220 PRINT_REG(mvfr1_el1);
1221 PRINT_REG(mvfr2_el1);
1222 PRINT_REG(revidr_el1);
1223 PRINT_REG(sctlr_el1);
1226 PRINT_REG(spsr_el1);
1228 PRINT_REG(tpidr_el0);
1229 PRINT_REG(tpidr_el1);
1230 PRINT_REG(tpidrro_el0);
1231 PRINT_REG(ttbr0_el1);
1232 PRINT_REG(ttbr1_el1);
1233 PRINT_REG(vbar_el1);
1237 DB_SHOW_COMMAND(vtop, db_show_vtop)
1242 phys = arm64_address_translate_s1e1r(addr);
1243 db_printf("EL1 physical address reg (read): 0x%016lx\n", phys);
1244 phys = arm64_address_translate_s1e1w(addr);
1245 db_printf("EL1 physical address reg (write): 0x%016lx\n", phys);
1246 phys = arm64_address_translate_s1e0r(addr);
1247 db_printf("EL0 physical address reg (read): 0x%016lx\n", phys);
1248 phys = arm64_address_translate_s1e0w(addr);
1249 db_printf("EL0 physical address reg (write): 0x%016lx\n", phys);
1251 db_printf("show vtop <virt_addr>\n");