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)
175 install_cpu_errata();
177 vm_ksubmap_init(&kmi);
179 vm_pager_bufferinit();
182 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
185 cpu_idle_wakeup(int cpu)
192 fill_regs(struct thread *td, struct reg *regs)
194 struct trapframe *frame;
196 frame = td->td_frame;
197 regs->sp = frame->tf_sp;
198 regs->lr = frame->tf_lr;
199 regs->elr = frame->tf_elr;
200 regs->spsr = frame->tf_spsr;
202 memcpy(regs->x, frame->tf_x, sizeof(regs->x));
208 set_regs(struct thread *td, struct reg *regs)
210 struct trapframe *frame;
212 frame = td->td_frame;
213 frame->tf_sp = regs->sp;
214 frame->tf_lr = regs->lr;
215 frame->tf_elr = regs->elr;
216 frame->tf_spsr &= ~PSR_FLAGS;
217 frame->tf_spsr |= regs->spsr & PSR_FLAGS;
219 memcpy(frame->tf_x, regs->x, sizeof(frame->tf_x));
225 fill_fpregs(struct thread *td, struct fpreg *regs)
231 if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
233 * If we have just been running VFP instructions we will
234 * need to save the state to memcpy it below.
237 vfp_save_state(td, pcb);
239 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
240 ("Called fill_fpregs while the kernel is using the VFP"));
241 memcpy(regs->fp_q, pcb->pcb_fpustate.vfp_regs,
243 regs->fp_cr = pcb->pcb_fpustate.vfp_fpcr;
244 regs->fp_sr = pcb->pcb_fpustate.vfp_fpsr;
247 memset(regs->fp_q, 0, sizeof(regs->fp_q));
252 set_fpregs(struct thread *td, struct fpreg *regs)
258 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
259 ("Called set_fpregs while the kernel is using the VFP"));
260 memcpy(pcb->pcb_fpustate.vfp_regs, regs->fp_q, sizeof(regs->fp_q));
261 pcb->pcb_fpustate.vfp_fpcr = regs->fp_cr;
262 pcb->pcb_fpustate.vfp_fpsr = regs->fp_sr;
268 fill_dbregs(struct thread *td, struct dbreg *regs)
271 printf("ARM64TODO: fill_dbregs");
276 set_dbregs(struct thread *td, struct dbreg *regs)
279 printf("ARM64TODO: set_dbregs");
283 #ifdef COMPAT_FREEBSD32
285 fill_regs32(struct thread *td, struct reg32 *regs)
288 printf("ARM64TODO: fill_regs32");
293 set_regs32(struct thread *td, struct reg32 *regs)
296 printf("ARM64TODO: set_regs32");
301 fill_fpregs32(struct thread *td, struct fpreg32 *regs)
304 printf("ARM64TODO: fill_fpregs32");
309 set_fpregs32(struct thread *td, struct fpreg32 *regs)
312 printf("ARM64TODO: set_fpregs32");
317 fill_dbregs32(struct thread *td, struct dbreg32 *regs)
320 printf("ARM64TODO: fill_dbregs32");
325 set_dbregs32(struct thread *td, struct dbreg32 *regs)
328 printf("ARM64TODO: set_dbregs32");
334 ptrace_set_pc(struct thread *td, u_long addr)
337 printf("ARM64TODO: ptrace_set_pc");
342 ptrace_single_step(struct thread *td)
345 td->td_frame->tf_spsr |= PSR_SS;
346 td->td_pcb->pcb_flags |= PCB_SINGLE_STEP;
351 ptrace_clear_single_step(struct thread *td)
354 td->td_frame->tf_spsr &= ~PSR_SS;
355 td->td_pcb->pcb_flags &= ~PCB_SINGLE_STEP;
360 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
362 struct trapframe *tf = td->td_frame;
364 memset(tf, 0, sizeof(struct trapframe));
367 tf->tf_sp = STACKALIGN(stack);
368 tf->tf_lr = imgp->entry_addr;
369 tf->tf_elr = imgp->entry_addr;
372 /* Sanity check these are the same size, they will be memcpy'd to and fro */
373 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
374 sizeof((struct gpregs *)0)->gp_x);
375 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
376 sizeof((struct reg *)0)->x);
379 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
381 struct trapframe *tf = td->td_frame;
383 if (clear_ret & GET_MC_CLEAR_RET) {
384 mcp->mc_gpregs.gp_x[0] = 0;
385 mcp->mc_gpregs.gp_spsr = tf->tf_spsr & ~PSR_C;
387 mcp->mc_gpregs.gp_x[0] = tf->tf_x[0];
388 mcp->mc_gpregs.gp_spsr = tf->tf_spsr;
391 memcpy(&mcp->mc_gpregs.gp_x[1], &tf->tf_x[1],
392 sizeof(mcp->mc_gpregs.gp_x[1]) * (nitems(mcp->mc_gpregs.gp_x) - 1));
394 mcp->mc_gpregs.gp_sp = tf->tf_sp;
395 mcp->mc_gpregs.gp_lr = tf->tf_lr;
396 mcp->mc_gpregs.gp_elr = tf->tf_elr;
402 set_mcontext(struct thread *td, mcontext_t *mcp)
404 struct trapframe *tf = td->td_frame;
407 spsr = mcp->mc_gpregs.gp_spsr;
408 if ((spsr & PSR_M_MASK) != PSR_M_EL0t ||
409 (spsr & (PSR_AARCH32 | PSR_F | PSR_I | PSR_A | PSR_D)) != 0)
412 memcpy(tf->tf_x, mcp->mc_gpregs.gp_x, sizeof(tf->tf_x));
414 tf->tf_sp = mcp->mc_gpregs.gp_sp;
415 tf->tf_lr = mcp->mc_gpregs.gp_lr;
416 tf->tf_elr = mcp->mc_gpregs.gp_elr;
417 tf->tf_spsr = mcp->mc_gpregs.gp_spsr;
423 get_fpcontext(struct thread *td, mcontext_t *mcp)
430 curpcb = curthread->td_pcb;
432 if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
434 * If we have just been running VFP instructions we will
435 * need to save the state to memcpy it below.
437 vfp_save_state(td, curpcb);
439 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
440 ("Called get_fpcontext while the kernel is using the VFP"));
441 KASSERT((curpcb->pcb_fpflags & ~PCB_FP_USERMASK) == 0,
442 ("Non-userspace FPU flags set in get_fpcontext"));
443 memcpy(mcp->mc_fpregs.fp_q, curpcb->pcb_fpustate.vfp_regs,
444 sizeof(mcp->mc_fpregs));
445 mcp->mc_fpregs.fp_cr = curpcb->pcb_fpustate.vfp_fpcr;
446 mcp->mc_fpregs.fp_sr = curpcb->pcb_fpustate.vfp_fpsr;
447 mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags;
448 mcp->mc_flags |= _MC_FP_VALID;
456 set_fpcontext(struct thread *td, mcontext_t *mcp)
463 if ((mcp->mc_flags & _MC_FP_VALID) != 0) {
464 curpcb = curthread->td_pcb;
467 * Discard any vfp state for the current thread, we
468 * are about to override it.
472 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
473 ("Called set_fpcontext while the kernel is using the VFP"));
474 memcpy(curpcb->pcb_fpustate.vfp_regs, mcp->mc_fpregs.fp_q,
475 sizeof(mcp->mc_fpregs));
476 curpcb->pcb_fpustate.vfp_fpcr = mcp->mc_fpregs.fp_cr;
477 curpcb->pcb_fpustate.vfp_fpsr = mcp->mc_fpregs.fp_sr;
478 curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags & PCB_FP_USERMASK;
492 if (!sched_runnable())
505 /* We should have shutdown by now, if not enter a low power sleep */
508 __asm __volatile("wfi");
513 * Flush the D-cache for non-DMA I/O so that the I-cache can
514 * be made coherent later.
517 cpu_flush_dcache(void *ptr, size_t len)
523 /* Get current clock frequency for the given CPU ID. */
525 cpu_est_clockrate(int cpu_id, uint64_t *rate)
529 pc = pcpu_find(cpu_id);
530 if (pc == NULL || rate == NULL)
533 if (pc->pc_clock == 0)
536 *rate = pc->pc_clock;
541 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
544 pcpu->pc_acpi_id = 0xffffffff;
554 if (td->td_md.md_spinlock_count == 0) {
555 daif = intr_disable();
556 td->td_md.md_spinlock_count = 1;
557 td->td_md.md_saved_daif = daif;
559 td->td_md.md_spinlock_count++;
571 daif = td->td_md.md_saved_daif;
572 td->td_md.md_spinlock_count--;
573 if (td->td_md.md_spinlock_count == 0)
577 #ifndef _SYS_SYSPROTO_H_
578 struct sigreturn_args {
584 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
591 if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
594 error = set_mcontext(td, &uc.uc_mcontext);
597 set_fpcontext(td, &uc.uc_mcontext);
599 /* Restore signal mask. */
600 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
602 return (EJUSTRETURN);
606 * Construct a PCB from a trapframe. This is called from kdb_trap() where
607 * we want to start a backtrace from the function that caused us to enter
608 * the debugger. We have the context in the trapframe, but base the trace
609 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
610 * enough for a backtrace.
613 makectx(struct trapframe *tf, struct pcb *pcb)
617 for (i = 0; i < PCB_LR; i++)
618 pcb->pcb_x[i] = tf->tf_x[i];
620 pcb->pcb_x[PCB_LR] = tf->tf_lr;
621 pcb->pcb_pc = tf->tf_elr;
622 pcb->pcb_sp = tf->tf_sp;
626 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
630 struct trapframe *tf;
631 struct sigframe *fp, frame;
633 struct sysentvec *sysent;
638 PROC_LOCK_ASSERT(p, MA_OWNED);
640 sig = ksi->ksi_signo;
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;
719 /* Set the base address of translation table 0. */
720 thread0.td_proc->p_md.md_l0addr = READ_SPECIALREG(ttbr0_el1);
729 } EFI_MEMORY_DESCRIPTOR;
732 add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap,
735 u_int i, insert_idx, _physmap_idx;
737 _physmap_idx = *physmap_idxp;
743 * Find insertion point while checking for overlap. Start off by
744 * assuming the new entry will be added to the end.
746 insert_idx = _physmap_idx;
747 for (i = 0; i <= _physmap_idx; i += 2) {
748 if (base < physmap[i + 1]) {
749 if (base + length <= physmap[i]) {
753 if (boothowto & RB_VERBOSE)
755 "Overlapping memory regions, ignoring second region\n");
760 /* See if we can prepend to the next entry. */
761 if (insert_idx <= _physmap_idx &&
762 base + length == physmap[insert_idx]) {
763 physmap[insert_idx] = base;
767 /* See if we can append to the previous entry. */
768 if (insert_idx > 0 && base == physmap[insert_idx - 1]) {
769 physmap[insert_idx - 1] += length;
774 *physmap_idxp = _physmap_idx;
775 if (_physmap_idx == PHYSMAP_SIZE) {
777 "Too many segments in the physical address map, giving up\n");
782 * Move the last 'N' entries down to make room for the new
785 for (i = _physmap_idx; i > insert_idx; i -= 2) {
786 physmap[i] = physmap[i - 2];
787 physmap[i + 1] = physmap[i - 1];
790 /* Insert the new entry. */
791 physmap[insert_idx] = base;
792 physmap[insert_idx + 1] = base + length;
798 add_fdt_mem_regions(struct mem_region *mr, int mrcnt, vm_paddr_t *physmap,
802 for (int i = 0; i < mrcnt; i++) {
803 if (!add_physmap_entry(mr[i].mr_start, mr[i].mr_size, physmap,
811 add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap,
814 struct efi_md *map, *p;
819 static const char *types[] = {
825 "RuntimeServicesCode",
826 "RuntimeServicesData",
827 "ConventionalMemory",
832 "MemoryMappedIOPortSpace",
838 * Memory map data provided by UEFI via the GetMemoryMap
841 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
842 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
844 if (efihdr->descriptor_size == 0)
846 ndesc = efihdr->memory_size / efihdr->descriptor_size;
848 if (boothowto & RB_VERBOSE)
849 printf("%23s %12s %12s %8s %4s\n",
850 "Type", "Physical", "Virtual", "#Pages", "Attr");
852 for (i = 0, p = map; i < ndesc; i++,
853 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
854 if (boothowto & RB_VERBOSE) {
855 if (p->md_type < nitems(types))
856 type = types[p->md_type];
859 printf("%23s %012lx %12p %08lx ", type, p->md_phys,
860 p->md_virt, p->md_pages);
861 if (p->md_attr & EFI_MD_ATTR_UC)
863 if (p->md_attr & EFI_MD_ATTR_WC)
865 if (p->md_attr & EFI_MD_ATTR_WT)
867 if (p->md_attr & EFI_MD_ATTR_WB)
869 if (p->md_attr & EFI_MD_ATTR_UCE)
871 if (p->md_attr & EFI_MD_ATTR_WP)
873 if (p->md_attr & EFI_MD_ATTR_RP)
875 if (p->md_attr & EFI_MD_ATTR_XP)
877 if (p->md_attr & EFI_MD_ATTR_NV)
879 if (p->md_attr & EFI_MD_ATTR_MORE_RELIABLE)
880 printf("MORE_RELIABLE ");
881 if (p->md_attr & EFI_MD_ATTR_RO)
883 if (p->md_attr & EFI_MD_ATTR_RT)
888 switch (p->md_type) {
889 case EFI_MD_TYPE_CODE:
890 case EFI_MD_TYPE_DATA:
891 case EFI_MD_TYPE_BS_CODE:
892 case EFI_MD_TYPE_BS_DATA:
893 case EFI_MD_TYPE_FREE:
895 * We're allowed to use any entry with these types.
902 if (!add_physmap_entry(p->md_phys, (p->md_pages * PAGE_SIZE),
903 physmap, physmap_idxp))
910 try_load_dtb(caddr_t kmdp)
914 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
915 if (dtbp == (vm_offset_t)NULL) {
916 printf("ERROR loading DTB\n");
920 if (OF_install(OFW_FDT, 0) == FALSE)
921 panic("Cannot install FDT");
923 if (OF_init((void *)dtbp) != 0)
924 panic("OF_init failed with the found device tree");
931 bool has_acpi, has_fdt;
934 has_acpi = has_fdt = false;
937 has_fdt = (OF_peer(0) != 0);
940 has_acpi = (acpi_find_table(ACPI_SIG_SPCR) != 0);
943 env = kern_getenv("kern.cfg.order");
946 while (order != NULL) {
948 strncmp(order, "acpi", 4) == 0 &&
949 (order[4] == ',' || order[4] == '\0')) {
950 arm64_bus_method = ARM64_BUS_ACPI;
954 strncmp(order, "fdt", 3) == 0 &&
955 (order[3] == ',' || order[3] == '\0')) {
956 arm64_bus_method = ARM64_BUS_FDT;
959 order = strchr(order, ',');
963 /* If we set the bus method it is valid */
964 if (arm64_bus_method != ARM64_BUS_NONE)
967 /* If no order or an invalid order was set use the default */
968 if (arm64_bus_method == ARM64_BUS_NONE) {
970 arm64_bus_method = ARM64_BUS_FDT;
972 arm64_bus_method = ARM64_BUS_ACPI;
976 * If no option was set the default is valid, otherwise we are
977 * setting one to get cninit() working, then calling panic to tell
978 * the user about the invalid bus setup.
980 return (env == NULL);
986 int dcache_line_shift, icache_line_shift, dczva_line_shift;
990 ctr_el0 = READ_SPECIALREG(ctr_el0);
992 /* Read the log2 words in each D cache line */
993 dcache_line_shift = CTR_DLINE_SIZE(ctr_el0);
994 /* Get the D cache line size */
995 dcache_line_size = sizeof(int) << dcache_line_shift;
997 /* And the same for the I cache */
998 icache_line_shift = CTR_ILINE_SIZE(ctr_el0);
999 icache_line_size = sizeof(int) << icache_line_shift;
1001 idcache_line_size = MIN(dcache_line_size, icache_line_size);
1003 dczid_el0 = READ_SPECIALREG(dczid_el0);
1005 /* Check if dc zva is not prohibited */
1006 if (dczid_el0 & DCZID_DZP)
1007 dczva_line_size = 0;
1009 /* Same as with above calculations */
1010 dczva_line_shift = DCZID_BS_SIZE(dczid_el0);
1011 dczva_line_size = sizeof(int) << dczva_line_shift;
1013 /* Change pagezero function */
1014 pagezero = pagezero_cache;
1019 initarm(struct arm64_bootparams *abp)
1021 struct efi_map_header *efihdr;
1025 struct mem_region mem_regions[FDT_MEM_REGIONS];
1028 vm_offset_t lastaddr;
1034 /* Set the module data location */
1035 preload_metadata = (caddr_t)(uintptr_t)(abp->modulep);
1037 /* Find the kernel address */
1038 kmdp = preload_search_by_type("elf kernel");
1040 kmdp = preload_search_by_type("elf64 kernel");
1042 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
1043 init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 0);
1049 efi_systbl_phys = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t);
1051 /* Find the address to start allocating from */
1052 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
1054 /* Load the physical memory ranges */
1056 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
1057 MODINFO_METADATA | MODINFOMD_EFI_MAP);
1059 add_efi_map_entries(efihdr, physmap, &physmap_idx);
1062 /* Grab physical memory regions information from device tree. */
1063 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,
1065 panic("Cannot get physical memory regions");
1066 add_fdt_mem_regions(mem_regions, mem_regions_sz, physmap,
1071 /* Print the memory map */
1073 for (i = 0; i < physmap_idx; i += 2) {
1074 dump_avail[i] = physmap[i];
1075 dump_avail[i + 1] = physmap[i + 1];
1076 mem_len += physmap[i + 1] - physmap[i];
1079 dump_avail[i + 1] = 0;
1081 /* Set the pcpu data, this is needed by pmap_bootstrap */
1083 pcpu_init(pcpup, 0, sizeof(struct pcpu));
1086 * Set the pcpu pointer with a backup in tpidr_el1 to be
1087 * loaded when entering the kernel from userland.
1091 "msr tpidr_el1, %0" :: "r"(pcpup));
1093 PCPU_SET(curthread, &thread0);
1095 /* Do basic tuning, hz etc */
1101 /* Bootstrap enough of pmap to enter the kernel proper */
1102 pmap_bootstrap(abp->kern_l0pt, abp->kern_l1pt,
1103 KERNBASE - abp->kern_delta, lastaddr - KERNBASE);
1105 devmap_bootstrap(0, NULL);
1107 valid = bus_probe();
1112 panic("Invalid bus configuration: %s",
1113 kern_getenv("kern.cfg.order"));
1115 init_proc0(abp->kern_stack);
1116 msgbufinit(msgbufp, msgbufsize);
1118 init_param2(physmem);
1124 env = kern_getenv("kernelname");
1126 strlcpy(kernelname, env, sizeof(kernelname));
1136 WRITE_SPECIALREG(OSLAR_EL1, 0);
1138 /* This permits DDB to use debug registers for watchpoints. */
1141 /* TODO: Eventually will need to initialize debug registers here. */
1145 #include <ddb/ddb.h>
1147 DB_SHOW_COMMAND(specialregs, db_show_spregs)
1149 #define PRINT_REG(reg) \
1150 db_printf(__STRING(reg) " = %#016lx\n", READ_SPECIALREG(reg))
1152 PRINT_REG(actlr_el1);
1153 PRINT_REG(afsr0_el1);
1154 PRINT_REG(afsr1_el1);
1155 PRINT_REG(aidr_el1);
1156 PRINT_REG(amair_el1);
1157 PRINT_REG(ccsidr_el1);
1158 PRINT_REG(clidr_el1);
1159 PRINT_REG(contextidr_el1);
1160 PRINT_REG(cpacr_el1);
1161 PRINT_REG(csselr_el1);
1163 PRINT_REG(currentel);
1165 PRINT_REG(dczid_el0);
1170 /* ARM64TODO: Enable VFP before reading floating-point registers */
1174 PRINT_REG(id_aa64afr0_el1);
1175 PRINT_REG(id_aa64afr1_el1);
1176 PRINT_REG(id_aa64dfr0_el1);
1177 PRINT_REG(id_aa64dfr1_el1);
1178 PRINT_REG(id_aa64isar0_el1);
1179 PRINT_REG(id_aa64isar1_el1);
1180 PRINT_REG(id_aa64pfr0_el1);
1181 PRINT_REG(id_aa64pfr1_el1);
1182 PRINT_REG(id_afr0_el1);
1183 PRINT_REG(id_dfr0_el1);
1184 PRINT_REG(id_isar0_el1);
1185 PRINT_REG(id_isar1_el1);
1186 PRINT_REG(id_isar2_el1);
1187 PRINT_REG(id_isar3_el1);
1188 PRINT_REG(id_isar4_el1);
1189 PRINT_REG(id_isar5_el1);
1190 PRINT_REG(id_mmfr0_el1);
1191 PRINT_REG(id_mmfr1_el1);
1192 PRINT_REG(id_mmfr2_el1);
1193 PRINT_REG(id_mmfr3_el1);
1195 /* Missing from llvm */
1196 PRINT_REG(id_mmfr4_el1);
1198 PRINT_REG(id_pfr0_el1);
1199 PRINT_REG(id_pfr1_el1);
1201 PRINT_REG(mair_el1);
1202 PRINT_REG(midr_el1);
1203 PRINT_REG(mpidr_el1);
1204 PRINT_REG(mvfr0_el1);
1205 PRINT_REG(mvfr1_el1);
1206 PRINT_REG(mvfr2_el1);
1207 PRINT_REG(revidr_el1);
1208 PRINT_REG(sctlr_el1);
1211 PRINT_REG(spsr_el1);
1213 PRINT_REG(tpidr_el0);
1214 PRINT_REG(tpidr_el1);
1215 PRINT_REG(tpidrro_el0);
1216 PRINT_REG(ttbr0_el1);
1217 PRINT_REG(ttbr1_el1);
1218 PRINT_REG(vbar_el1);
1222 DB_SHOW_COMMAND(vtop, db_show_vtop)
1227 phys = arm64_address_translate_s1e1r(addr);
1228 db_printf("EL1 physical address reg (read): 0x%016lx\n", phys);
1229 phys = arm64_address_translate_s1e1w(addr);
1230 db_printf("EL1 physical address reg (write): 0x%016lx\n", phys);
1231 phys = arm64_address_translate_s1e0r(addr);
1232 db_printf("EL0 physical address reg (read): 0x%016lx\n", phys);
1233 phys = arm64_address_translate_s1e0w(addr);
1234 db_printf("EL0 physical address reg (write): 0x%016lx\n", phys);
1236 db_printf("show vtop <virt_addr>\n");