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 #define PHYSMAP_SIZE (2 * (VM_PHYSSEG_MAX - 1))
110 vm_paddr_t physmap[PHYSMAP_SIZE];
113 struct kva_md_info kmi;
115 int64_t dcache_line_size; /* The minimum D cache line size */
116 int64_t icache_line_size; /* The minimum I cache line size */
117 int64_t idcache_line_size; /* The minimum cache line size */
118 int64_t dczva_line_size; /* The size of cache line the dc zva zeroes */
122 * Physical address of the EFI System Table. Stashed from the metadata hints
123 * passed into the kernel and used by the EFI code to call runtime services.
125 vm_paddr_t efi_systbl_phys;
127 /* pagezero_* implementations are provided in support.S */
128 void pagezero_simple(void *);
129 void pagezero_cache(void *);
131 /* pagezero_simple is default pagezero */
132 void (*pagezero)(void *p) = pagezero_simple;
137 uint64_t id_aa64mfr1;
139 id_aa64mfr1 = READ_SPECIALREG(id_aa64mmfr1_el1);
140 if (ID_AA64MMFR1_PAN(id_aa64mfr1) != ID_AA64MMFR1_PAN_NONE)
149 * The LLVM integrated assembler doesn't understand the PAN
150 * PSTATE field. Because of this we need to manually create
151 * the instruction in an asm block. This is equivalent to:
154 * This sets the PAN bit, stopping the kernel from accessing
155 * memory when userspace can also access it unless the kernel
156 * uses the userspace load/store instructions.
159 WRITE_SPECIALREG(sctlr_el1,
160 READ_SPECIALREG(sctlr_el1) & ~SCTLR_SPAN);
161 __asm __volatile(".inst 0xd500409f | (0x1 << 8)");
166 cpu_startup(void *dummy)
171 install_cpu_errata();
173 vm_ksubmap_init(&kmi);
175 vm_pager_bufferinit();
178 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
181 cpu_idle_wakeup(int cpu)
188 fill_regs(struct thread *td, struct reg *regs)
190 struct trapframe *frame;
192 frame = td->td_frame;
193 regs->sp = frame->tf_sp;
194 regs->lr = frame->tf_lr;
195 regs->elr = frame->tf_elr;
196 regs->spsr = frame->tf_spsr;
198 memcpy(regs->x, frame->tf_x, sizeof(regs->x));
204 set_regs(struct thread *td, struct reg *regs)
206 struct trapframe *frame;
208 frame = td->td_frame;
209 frame->tf_sp = regs->sp;
210 frame->tf_lr = regs->lr;
211 frame->tf_elr = regs->elr;
212 frame->tf_spsr &= ~PSR_FLAGS;
213 frame->tf_spsr |= regs->spsr & PSR_FLAGS;
215 memcpy(frame->tf_x, regs->x, sizeof(frame->tf_x));
221 fill_fpregs(struct thread *td, struct fpreg *regs)
227 if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
229 * If we have just been running VFP instructions we will
230 * need to save the state to memcpy it below.
233 vfp_save_state(td, pcb);
235 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
236 ("Called fill_fpregs while the kernel is using the VFP"));
237 memcpy(regs->fp_q, pcb->pcb_fpustate.vfp_regs,
239 regs->fp_cr = pcb->pcb_fpustate.vfp_fpcr;
240 regs->fp_sr = pcb->pcb_fpustate.vfp_fpsr;
243 memset(regs->fp_q, 0, sizeof(regs->fp_q));
248 set_fpregs(struct thread *td, struct fpreg *regs)
254 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
255 ("Called set_fpregs while the kernel is using the VFP"));
256 memcpy(pcb->pcb_fpustate.vfp_regs, regs->fp_q, sizeof(regs->fp_q));
257 pcb->pcb_fpustate.vfp_fpcr = regs->fp_cr;
258 pcb->pcb_fpustate.vfp_fpsr = regs->fp_sr;
264 fill_dbregs(struct thread *td, struct dbreg *regs)
267 printf("ARM64TODO: fill_dbregs");
272 set_dbregs(struct thread *td, struct dbreg *regs)
275 printf("ARM64TODO: set_dbregs");
279 #ifdef COMPAT_FREEBSD32
281 fill_regs32(struct thread *td, struct reg32 *regs)
284 printf("ARM64TODO: fill_regs32");
289 set_regs32(struct thread *td, struct reg32 *regs)
292 printf("ARM64TODO: set_regs32");
297 fill_fpregs32(struct thread *td, struct fpreg32 *regs)
300 printf("ARM64TODO: fill_fpregs32");
305 set_fpregs32(struct thread *td, struct fpreg32 *regs)
308 printf("ARM64TODO: set_fpregs32");
313 fill_dbregs32(struct thread *td, struct dbreg32 *regs)
316 printf("ARM64TODO: fill_dbregs32");
321 set_dbregs32(struct thread *td, struct dbreg32 *regs)
324 printf("ARM64TODO: set_dbregs32");
330 ptrace_set_pc(struct thread *td, u_long addr)
333 printf("ARM64TODO: ptrace_set_pc");
338 ptrace_single_step(struct thread *td)
341 td->td_frame->tf_spsr |= PSR_SS;
342 td->td_pcb->pcb_flags |= PCB_SINGLE_STEP;
347 ptrace_clear_single_step(struct thread *td)
350 td->td_frame->tf_spsr &= ~PSR_SS;
351 td->td_pcb->pcb_flags &= ~PCB_SINGLE_STEP;
356 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
358 struct trapframe *tf = td->td_frame;
360 memset(tf, 0, sizeof(struct trapframe));
363 tf->tf_sp = STACKALIGN(stack);
364 tf->tf_lr = imgp->entry_addr;
365 tf->tf_elr = imgp->entry_addr;
368 /* Sanity check these are the same size, they will be memcpy'd to and fro */
369 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
370 sizeof((struct gpregs *)0)->gp_x);
371 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
372 sizeof((struct reg *)0)->x);
375 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
377 struct trapframe *tf = td->td_frame;
379 if (clear_ret & GET_MC_CLEAR_RET) {
380 mcp->mc_gpregs.gp_x[0] = 0;
381 mcp->mc_gpregs.gp_spsr = tf->tf_spsr & ~PSR_C;
383 mcp->mc_gpregs.gp_x[0] = tf->tf_x[0];
384 mcp->mc_gpregs.gp_spsr = tf->tf_spsr;
387 memcpy(&mcp->mc_gpregs.gp_x[1], &tf->tf_x[1],
388 sizeof(mcp->mc_gpregs.gp_x[1]) * (nitems(mcp->mc_gpregs.gp_x) - 1));
390 mcp->mc_gpregs.gp_sp = tf->tf_sp;
391 mcp->mc_gpregs.gp_lr = tf->tf_lr;
392 mcp->mc_gpregs.gp_elr = tf->tf_elr;
398 set_mcontext(struct thread *td, mcontext_t *mcp)
400 struct trapframe *tf = td->td_frame;
403 spsr = mcp->mc_gpregs.gp_spsr;
404 if ((spsr & PSR_M_MASK) != PSR_M_EL0t ||
405 (spsr & (PSR_AARCH32 | PSR_F | PSR_I | PSR_A | PSR_D)) != 0)
408 memcpy(tf->tf_x, mcp->mc_gpregs.gp_x, sizeof(tf->tf_x));
410 tf->tf_sp = mcp->mc_gpregs.gp_sp;
411 tf->tf_lr = mcp->mc_gpregs.gp_lr;
412 tf->tf_elr = mcp->mc_gpregs.gp_elr;
413 tf->tf_spsr = mcp->mc_gpregs.gp_spsr;
419 get_fpcontext(struct thread *td, mcontext_t *mcp)
426 curpcb = curthread->td_pcb;
428 if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
430 * If we have just been running VFP instructions we will
431 * need to save the state to memcpy it below.
433 vfp_save_state(td, curpcb);
435 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
436 ("Called get_fpcontext while the kernel is using the VFP"));
437 KASSERT((curpcb->pcb_fpflags & ~PCB_FP_USERMASK) == 0,
438 ("Non-userspace FPU flags set in get_fpcontext"));
439 memcpy(mcp->mc_fpregs.fp_q, curpcb->pcb_fpustate.vfp_regs,
440 sizeof(mcp->mc_fpregs));
441 mcp->mc_fpregs.fp_cr = curpcb->pcb_fpustate.vfp_fpcr;
442 mcp->mc_fpregs.fp_sr = curpcb->pcb_fpustate.vfp_fpsr;
443 mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags;
444 mcp->mc_flags |= _MC_FP_VALID;
452 set_fpcontext(struct thread *td, mcontext_t *mcp)
459 if ((mcp->mc_flags & _MC_FP_VALID) != 0) {
460 curpcb = curthread->td_pcb;
463 * Discard any vfp state for the current thread, we
464 * are about to override it.
468 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
469 ("Called set_fpcontext while the kernel is using the VFP"));
470 memcpy(curpcb->pcb_fpustate.vfp_regs, mcp->mc_fpregs.fp_q,
471 sizeof(mcp->mc_fpregs));
472 curpcb->pcb_fpustate.vfp_fpcr = mcp->mc_fpregs.fp_cr;
473 curpcb->pcb_fpustate.vfp_fpsr = mcp->mc_fpregs.fp_sr;
474 curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags & PCB_FP_USERMASK;
488 if (!sched_runnable())
501 /* We should have shutdown by now, if not enter a low power sleep */
504 __asm __volatile("wfi");
509 * Flush the D-cache for non-DMA I/O so that the I-cache can
510 * be made coherent later.
513 cpu_flush_dcache(void *ptr, size_t len)
519 /* Get current clock frequency for the given CPU ID. */
521 cpu_est_clockrate(int cpu_id, uint64_t *rate)
525 pc = pcpu_find(cpu_id);
526 if (pc == NULL || rate == NULL)
529 if (pc->pc_clock == 0)
532 *rate = pc->pc_clock;
537 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
540 pcpu->pc_acpi_id = 0xffffffff;
550 if (td->td_md.md_spinlock_count == 0) {
551 daif = intr_disable();
552 td->td_md.md_spinlock_count = 1;
553 td->td_md.md_saved_daif = daif;
555 td->td_md.md_spinlock_count++;
567 daif = td->td_md.md_saved_daif;
568 td->td_md.md_spinlock_count--;
569 if (td->td_md.md_spinlock_count == 0)
573 #ifndef _SYS_SYSPROTO_H_
574 struct sigreturn_args {
580 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
587 if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
590 error = set_mcontext(td, &uc.uc_mcontext);
593 set_fpcontext(td, &uc.uc_mcontext);
595 /* Restore signal mask. */
596 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
598 return (EJUSTRETURN);
602 * Construct a PCB from a trapframe. This is called from kdb_trap() where
603 * we want to start a backtrace from the function that caused us to enter
604 * the debugger. We have the context in the trapframe, but base the trace
605 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
606 * enough for a backtrace.
609 makectx(struct trapframe *tf, struct pcb *pcb)
613 for (i = 0; i < PCB_LR; i++)
614 pcb->pcb_x[i] = tf->tf_x[i];
616 pcb->pcb_x[PCB_LR] = tf->tf_lr;
617 pcb->pcb_pc = tf->tf_elr;
618 pcb->pcb_sp = tf->tf_sp;
622 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
626 struct trapframe *tf;
627 struct sigframe *fp, frame;
629 struct sysentvec *sysent;
634 PROC_LOCK_ASSERT(p, MA_OWNED);
636 sig = ksi->ksi_signo;
638 mtx_assert(&psp->ps_mtx, MA_OWNED);
641 onstack = sigonstack(tf->tf_sp);
643 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
646 /* Allocate and validate space for the signal handler context. */
647 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack &&
648 SIGISMEMBER(psp->ps_sigonstack, sig)) {
649 fp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp +
650 td->td_sigstk.ss_size);
651 #if defined(COMPAT_43)
652 td->td_sigstk.ss_flags |= SS_ONSTACK;
655 fp = (struct sigframe *)td->td_frame->tf_sp;
658 /* Make room, keeping the stack aligned */
660 fp = (struct sigframe *)STACKALIGN(fp);
662 /* Fill in the frame to copy out */
663 get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
664 get_fpcontext(td, &frame.sf_uc.uc_mcontext);
665 frame.sf_si = ksi->ksi_info;
666 frame.sf_uc.uc_sigmask = *mask;
667 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
668 ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE;
669 frame.sf_uc.uc_stack = td->td_sigstk;
670 mtx_unlock(&psp->ps_mtx);
671 PROC_UNLOCK(td->td_proc);
673 /* Copy the sigframe out to the user's stack. */
674 if (copyout(&frame, fp, sizeof(*fp)) != 0) {
675 /* Process has trashed its stack. Kill it. */
676 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp);
682 tf->tf_x[1] = (register_t)&fp->sf_si;
683 tf->tf_x[2] = (register_t)&fp->sf_uc;
685 tf->tf_elr = (register_t)catcher;
686 tf->tf_sp = (register_t)fp;
687 sysent = p->p_sysent;
688 if (sysent->sv_sigcode_base != 0)
689 tf->tf_lr = (register_t)sysent->sv_sigcode_base;
691 tf->tf_lr = (register_t)(sysent->sv_psstrings -
692 *(sysent->sv_szsigcode));
694 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr,
698 mtx_lock(&psp->ps_mtx);
702 init_proc0(vm_offset_t kstack)
704 struct pcpu *pcpup = &__pcpu[0];
706 proc_linkup0(&proc0, &thread0);
707 thread0.td_kstack = kstack;
708 thread0.td_pcb = (struct pcb *)(thread0.td_kstack) - 1;
709 thread0.td_pcb->pcb_fpflags = 0;
710 thread0.td_pcb->pcb_fpusaved = &thread0.td_pcb->pcb_fpustate;
711 thread0.td_pcb->pcb_vfpcpu = UINT_MAX;
712 thread0.td_frame = &proc0_tf;
713 pcpup->pc_curpcb = thread0.td_pcb;
715 /* Set the base address of translation table 0. */
716 thread0.td_proc->p_md.md_l0addr = READ_SPECIALREG(ttbr0_el1);
725 } EFI_MEMORY_DESCRIPTOR;
728 add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap,
731 u_int i, insert_idx, _physmap_idx;
733 _physmap_idx = *physmap_idxp;
739 * Find insertion point while checking for overlap. Start off by
740 * assuming the new entry will be added to the end.
742 insert_idx = _physmap_idx;
743 for (i = 0; i <= _physmap_idx; i += 2) {
744 if (base < physmap[i + 1]) {
745 if (base + length <= physmap[i]) {
749 if (boothowto & RB_VERBOSE)
751 "Overlapping memory regions, ignoring second region\n");
756 /* See if we can prepend to the next entry. */
757 if (insert_idx <= _physmap_idx &&
758 base + length == physmap[insert_idx]) {
759 physmap[insert_idx] = base;
763 /* See if we can append to the previous entry. */
764 if (insert_idx > 0 && base == physmap[insert_idx - 1]) {
765 physmap[insert_idx - 1] += length;
770 *physmap_idxp = _physmap_idx;
771 if (_physmap_idx == PHYSMAP_SIZE) {
773 "Too many segments in the physical address map, giving up\n");
778 * Move the last 'N' entries down to make room for the new
781 for (i = _physmap_idx; i > insert_idx; i -= 2) {
782 physmap[i] = physmap[i - 2];
783 physmap[i + 1] = physmap[i - 1];
786 /* Insert the new entry. */
787 physmap[insert_idx] = base;
788 physmap[insert_idx + 1] = base + length;
794 add_fdt_mem_regions(struct mem_region *mr, int mrcnt, vm_paddr_t *physmap,
798 for (int i = 0; i < mrcnt; i++) {
799 if (!add_physmap_entry(mr[i].mr_start, mr[i].mr_size, physmap,
807 add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap,
810 struct efi_md *map, *p;
815 static const char *types[] = {
821 "RuntimeServicesCode",
822 "RuntimeServicesData",
823 "ConventionalMemory",
828 "MemoryMappedIOPortSpace",
834 * Memory map data provided by UEFI via the GetMemoryMap
837 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
838 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
840 if (efihdr->descriptor_size == 0)
842 ndesc = efihdr->memory_size / efihdr->descriptor_size;
844 if (boothowto & RB_VERBOSE)
845 printf("%23s %12s %12s %8s %4s\n",
846 "Type", "Physical", "Virtual", "#Pages", "Attr");
848 for (i = 0, p = map; i < ndesc; i++,
849 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
850 if (boothowto & RB_VERBOSE) {
851 if (p->md_type < nitems(types))
852 type = types[p->md_type];
855 printf("%23s %012lx %12p %08lx ", type, p->md_phys,
856 p->md_virt, p->md_pages);
857 if (p->md_attr & EFI_MD_ATTR_UC)
859 if (p->md_attr & EFI_MD_ATTR_WC)
861 if (p->md_attr & EFI_MD_ATTR_WT)
863 if (p->md_attr & EFI_MD_ATTR_WB)
865 if (p->md_attr & EFI_MD_ATTR_UCE)
867 if (p->md_attr & EFI_MD_ATTR_WP)
869 if (p->md_attr & EFI_MD_ATTR_RP)
871 if (p->md_attr & EFI_MD_ATTR_XP)
873 if (p->md_attr & EFI_MD_ATTR_NV)
875 if (p->md_attr & EFI_MD_ATTR_MORE_RELIABLE)
876 printf("MORE_RELIABLE ");
877 if (p->md_attr & EFI_MD_ATTR_RO)
879 if (p->md_attr & EFI_MD_ATTR_RT)
884 switch (p->md_type) {
885 case EFI_MD_TYPE_CODE:
886 case EFI_MD_TYPE_DATA:
887 case EFI_MD_TYPE_BS_CODE:
888 case EFI_MD_TYPE_BS_DATA:
889 case EFI_MD_TYPE_FREE:
891 * We're allowed to use any entry with these types.
898 arm_physmem_hardware_region(p->md_phys,
899 p->md_pages * PAGE_SIZE);
900 if (!add_physmap_entry(p->md_phys, (p->md_pages * PAGE_SIZE),
901 physmap, physmap_idxp))
908 try_load_dtb(caddr_t kmdp)
912 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
913 if (dtbp == (vm_offset_t)NULL) {
914 printf("ERROR loading DTB\n");
918 if (OF_install(OFW_FDT, 0) == FALSE)
919 panic("Cannot install FDT");
921 if (OF_init((void *)dtbp) != 0)
922 panic("OF_init failed with the found device tree");
929 bool has_acpi, has_fdt;
932 has_acpi = has_fdt = false;
935 has_fdt = (OF_peer(0) != 0);
938 has_acpi = (acpi_find_table(ACPI_SIG_SPCR) != 0);
941 env = kern_getenv("kern.cfg.order");
944 while (order != NULL) {
946 strncmp(order, "acpi", 4) == 0 &&
947 (order[4] == ',' || order[4] == '\0')) {
948 arm64_bus_method = ARM64_BUS_ACPI;
952 strncmp(order, "fdt", 3) == 0 &&
953 (order[3] == ',' || order[3] == '\0')) {
954 arm64_bus_method = ARM64_BUS_FDT;
957 order = strchr(order, ',');
961 /* If we set the bus method it is valid */
962 if (arm64_bus_method != ARM64_BUS_NONE)
965 /* If no order or an invalid order was set use the default */
966 if (arm64_bus_method == ARM64_BUS_NONE) {
968 arm64_bus_method = ARM64_BUS_FDT;
970 arm64_bus_method = ARM64_BUS_ACPI;
974 * If no option was set the default is valid, otherwise we are
975 * setting one to get cninit() working, then calling panic to tell
976 * the user about the invalid bus setup.
978 return (env == NULL);
984 int dcache_line_shift, icache_line_shift, dczva_line_shift;
988 ctr_el0 = READ_SPECIALREG(ctr_el0);
990 /* Read the log2 words in each D cache line */
991 dcache_line_shift = CTR_DLINE_SIZE(ctr_el0);
992 /* Get the D cache line size */
993 dcache_line_size = sizeof(int) << dcache_line_shift;
995 /* And the same for the I cache */
996 icache_line_shift = CTR_ILINE_SIZE(ctr_el0);
997 icache_line_size = sizeof(int) << icache_line_shift;
999 idcache_line_size = MIN(dcache_line_size, icache_line_size);
1001 dczid_el0 = READ_SPECIALREG(dczid_el0);
1003 /* Check if dc zva is not prohibited */
1004 if (dczid_el0 & DCZID_DZP)
1005 dczva_line_size = 0;
1007 /* Same as with above calculations */
1008 dczva_line_shift = DCZID_BS_SIZE(dczid_el0);
1009 dczva_line_size = sizeof(int) << dczva_line_shift;
1011 /* Change pagezero function */
1012 pagezero = pagezero_cache;
1017 initarm(struct arm64_bootparams *abp)
1019 struct efi_map_header *efihdr;
1023 struct mem_region mem_regions[FDT_MEM_REGIONS];
1026 vm_offset_t lastaddr;
1030 /* Set the module data location */
1031 preload_metadata = (caddr_t)(uintptr_t)(abp->modulep);
1033 /* Find the kernel address */
1034 kmdp = preload_search_by_type("elf kernel");
1036 kmdp = preload_search_by_type("elf64 kernel");
1038 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
1039 init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 0);
1045 efi_systbl_phys = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t);
1047 /* Find the address to start allocating from */
1048 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
1050 /* Load the physical memory ranges */
1052 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
1053 MODINFO_METADATA | MODINFOMD_EFI_MAP);
1055 add_efi_map_entries(efihdr, physmap, &physmap_idx);
1058 /* Grab physical memory regions information from device tree. */
1059 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,
1061 panic("Cannot get physical memory regions");
1062 add_fdt_mem_regions(mem_regions, mem_regions_sz, physmap,
1064 arm_physmem_hardware_regions(mem_regions, mem_regions_sz);
1066 if (fdt_get_reserved_mem(mem_regions, &mem_regions_sz) == 0)
1067 arm_physmem_exclude_regions(mem_regions, mem_regions_sz,
1068 EXFLAG_NODUMP | EXFLAG_NOALLOC);
1071 /* Set the pcpu data, this is needed by pmap_bootstrap */
1073 pcpu_init(pcpup, 0, sizeof(struct pcpu));
1076 * Set the pcpu pointer with a backup in tpidr_el1 to be
1077 * loaded when entering the kernel from userland.
1081 "msr tpidr_el1, %0" :: "r"(pcpup));
1083 PCPU_SET(curthread, &thread0);
1085 /* Do basic tuning, hz etc */
1091 /* Bootstrap enough of pmap to enter the kernel proper */
1092 pmap_bootstrap(abp->kern_l0pt, abp->kern_l1pt,
1093 KERNBASE - abp->kern_delta, lastaddr - KERNBASE);
1094 arm_physmem_init_kernel_globals();
1096 devmap_bootstrap(0, NULL);
1098 valid = bus_probe();
1103 panic("Invalid bus configuration: %s",
1104 kern_getenv("kern.cfg.order"));
1106 init_proc0(abp->kern_stack);
1107 msgbufinit(msgbufp, msgbufsize);
1109 init_param2(physmem);
1115 env = kern_getenv("kernelname");
1117 strlcpy(kernelname, env, sizeof(kernelname));
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");