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>
84 #include <machine/vfp.h>
88 #include <contrib/dev/acpica/include/acpi.h>
89 #include <machine/acpica_machdep.h>
93 #include <dev/fdt/fdt_common.h>
94 #include <dev/ofw/openfirm.h>
98 enum arm64_bus arm64_bus_method = ARM64_BUS_NONE;
100 struct pcpu __pcpu[MAXCPU];
102 static struct trapframe proc0_tf;
104 vm_paddr_t phys_avail[PHYS_AVAIL_SIZE + 2];
105 vm_paddr_t dump_avail[PHYS_AVAIL_SIZE + 2];
112 #define PHYSMAP_SIZE (2 * (VM_PHYSSEG_MAX - 1))
113 vm_paddr_t physmap[PHYSMAP_SIZE];
116 struct kva_md_info kmi;
118 int64_t dcache_line_size; /* The minimum D cache line size */
119 int64_t icache_line_size; /* The minimum I cache line size */
120 int64_t idcache_line_size; /* The minimum cache line size */
121 int64_t dczva_line_size; /* The size of cache line the dc zva zeroes */
125 * Physical address of the EFI System Table. Stashed from the metadata hints
126 * passed into the kernel and used by the EFI code to call runtime services.
128 vm_paddr_t efi_systbl_phys;
130 /* pagezero_* implementations are provided in support.S */
131 void pagezero_simple(void *);
132 void pagezero_cache(void *);
134 /* pagezero_simple is default pagezero */
135 void (*pagezero)(void *p) = pagezero_simple;
140 uint64_t id_aa64mfr1;
142 id_aa64mfr1 = READ_SPECIALREG(id_aa64mmfr1_el1);
143 if (ID_AA64MMFR1_PAN(id_aa64mfr1) != ID_AA64MMFR1_PAN_NONE)
152 * The LLVM integrated assembler doesn't understand the PAN
153 * PSTATE field. Because of this we need to manually create
154 * the instruction in an asm block. This is equivalent to:
157 * This sets the PAN bit, stopping the kernel from accessing
158 * memory when userspace can also access it unless the kernel
159 * uses the userspace load/store instructions.
162 WRITE_SPECIALREG(sctlr_el1,
163 READ_SPECIALREG(sctlr_el1) & ~SCTLR_SPAN);
164 __asm __volatile(".inst 0xd500409f | (0x1 << 8)");
169 cpu_startup(void *dummy)
175 vm_ksubmap_init(&kmi);
177 vm_pager_bufferinit();
180 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
183 cpu_idle_wakeup(int cpu)
190 fill_regs(struct thread *td, struct reg *regs)
192 struct trapframe *frame;
194 frame = td->td_frame;
195 regs->sp = frame->tf_sp;
196 regs->lr = frame->tf_lr;
197 regs->elr = frame->tf_elr;
198 regs->spsr = frame->tf_spsr;
200 memcpy(regs->x, frame->tf_x, sizeof(regs->x));
206 set_regs(struct thread *td, struct reg *regs)
208 struct trapframe *frame;
210 frame = td->td_frame;
211 frame->tf_sp = regs->sp;
212 frame->tf_lr = regs->lr;
213 frame->tf_elr = regs->elr;
214 frame->tf_spsr = regs->spsr;
216 memcpy(frame->tf_x, regs->x, sizeof(frame->tf_x));
222 fill_fpregs(struct thread *td, struct fpreg *regs)
228 if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
230 * If we have just been running VFP instructions we will
231 * need to save the state to memcpy it below.
234 vfp_save_state(td, pcb);
236 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
237 ("Called fill_fpregs while the kernel is using the VFP"));
238 memcpy(regs->fp_q, pcb->pcb_fpustate.vfp_regs,
240 regs->fp_cr = pcb->pcb_fpustate.vfp_fpcr;
241 regs->fp_sr = pcb->pcb_fpustate.vfp_fpsr;
244 memset(regs->fp_q, 0, sizeof(regs->fp_q));
249 set_fpregs(struct thread *td, struct fpreg *regs)
255 KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate,
256 ("Called set_fpregs while the kernel is using the VFP"));
257 memcpy(pcb->pcb_fpustate.vfp_regs, regs->fp_q, sizeof(regs->fp_q));
258 pcb->pcb_fpustate.vfp_fpcr = regs->fp_cr;
259 pcb->pcb_fpustate.vfp_fpsr = regs->fp_sr;
265 fill_dbregs(struct thread *td, struct dbreg *regs)
268 printf("ARM64TODO: fill_dbregs");
273 set_dbregs(struct thread *td, struct dbreg *regs)
276 printf("ARM64TODO: set_dbregs");
281 ptrace_set_pc(struct thread *td, u_long addr)
284 printf("ARM64TODO: ptrace_set_pc");
289 ptrace_single_step(struct thread *td)
292 td->td_frame->tf_spsr |= PSR_SS;
293 td->td_pcb->pcb_flags |= PCB_SINGLE_STEP;
298 ptrace_clear_single_step(struct thread *td)
301 td->td_frame->tf_spsr &= ~PSR_SS;
302 td->td_pcb->pcb_flags &= ~PCB_SINGLE_STEP;
307 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
309 struct trapframe *tf = td->td_frame;
311 memset(tf, 0, sizeof(struct trapframe));
314 * We need to set x0 for init as it doesn't call
315 * cpu_set_syscall_retval to copy the value. We also
316 * need to set td_retval for the cases where we do.
318 tf->tf_x[0] = td->td_retval[0] = stack;
319 tf->tf_sp = STACKALIGN(stack);
320 tf->tf_lr = imgp->entry_addr;
321 tf->tf_elr = imgp->entry_addr;
324 /* Sanity check these are the same size, they will be memcpy'd to and fro */
325 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
326 sizeof((struct gpregs *)0)->gp_x);
327 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
328 sizeof((struct reg *)0)->x);
331 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
333 struct trapframe *tf = td->td_frame;
335 if (clear_ret & GET_MC_CLEAR_RET) {
336 mcp->mc_gpregs.gp_x[0] = 0;
337 mcp->mc_gpregs.gp_spsr = tf->tf_spsr & ~PSR_C;
339 mcp->mc_gpregs.gp_x[0] = tf->tf_x[0];
340 mcp->mc_gpregs.gp_spsr = tf->tf_spsr;
343 memcpy(&mcp->mc_gpregs.gp_x[1], &tf->tf_x[1],
344 sizeof(mcp->mc_gpregs.gp_x[1]) * (nitems(mcp->mc_gpregs.gp_x) - 1));
346 mcp->mc_gpregs.gp_sp = tf->tf_sp;
347 mcp->mc_gpregs.gp_lr = tf->tf_lr;
348 mcp->mc_gpregs.gp_elr = tf->tf_elr;
354 set_mcontext(struct thread *td, mcontext_t *mcp)
356 struct trapframe *tf = td->td_frame;
358 memcpy(tf->tf_x, mcp->mc_gpregs.gp_x, sizeof(tf->tf_x));
360 tf->tf_sp = mcp->mc_gpregs.gp_sp;
361 tf->tf_lr = mcp->mc_gpregs.gp_lr;
362 tf->tf_elr = mcp->mc_gpregs.gp_elr;
363 tf->tf_spsr = mcp->mc_gpregs.gp_spsr;
369 get_fpcontext(struct thread *td, mcontext_t *mcp)
376 curpcb = curthread->td_pcb;
378 if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
380 * If we have just been running VFP instructions we will
381 * need to save the state to memcpy it below.
383 vfp_save_state(td, curpcb);
385 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
386 ("Called get_fpcontext while the kernel is using the VFP"));
387 KASSERT((curpcb->pcb_fpflags & ~PCB_FP_USERMASK) == 0,
388 ("Non-userspace FPU flags set in get_fpcontext"));
389 memcpy(mcp->mc_fpregs.fp_q, curpcb->pcb_fpustate.vfp_regs,
390 sizeof(mcp->mc_fpregs));
391 mcp->mc_fpregs.fp_cr = curpcb->pcb_fpustate.vfp_fpcr;
392 mcp->mc_fpregs.fp_sr = curpcb->pcb_fpustate.vfp_fpsr;
393 mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags;
394 mcp->mc_flags |= _MC_FP_VALID;
402 set_fpcontext(struct thread *td, mcontext_t *mcp)
409 if ((mcp->mc_flags & _MC_FP_VALID) != 0) {
410 curpcb = curthread->td_pcb;
413 * Discard any vfp state for the current thread, we
414 * are about to override it.
418 KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate,
419 ("Called set_fpcontext while the kernel is using the VFP"));
420 memcpy(curpcb->pcb_fpustate.vfp_regs, mcp->mc_fpregs.fp_q,
421 sizeof(mcp->mc_fpregs));
422 curpcb->pcb_fpustate.vfp_fpcr = mcp->mc_fpregs.fp_cr;
423 curpcb->pcb_fpustate.vfp_fpsr = mcp->mc_fpregs.fp_sr;
424 curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags & PCB_FP_USERMASK;
438 if (!sched_runnable())
451 /* We should have shutdown by now, if not enter a low power sleep */
454 __asm __volatile("wfi");
459 * Flush the D-cache for non-DMA I/O so that the I-cache can
460 * be made coherent later.
463 cpu_flush_dcache(void *ptr, size_t len)
469 /* Get current clock frequency for the given CPU ID. */
471 cpu_est_clockrate(int cpu_id, uint64_t *rate)
475 pc = pcpu_find(cpu_id);
476 if (pc == NULL || rate == NULL)
479 if (pc->pc_clock == 0)
482 *rate = pc->pc_clock;
487 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
490 pcpu->pc_acpi_id = 0xffffffff;
500 if (td->td_md.md_spinlock_count == 0) {
501 daif = intr_disable();
502 td->td_md.md_spinlock_count = 1;
503 td->td_md.md_saved_daif = daif;
505 td->td_md.md_spinlock_count++;
517 daif = td->td_md.md_saved_daif;
518 td->td_md.md_spinlock_count--;
519 if (td->td_md.md_spinlock_count == 0)
523 #ifndef _SYS_SYSPROTO_H_
524 struct sigreturn_args {
530 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
537 if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
540 spsr = uc.uc_mcontext.mc_gpregs.gp_spsr;
541 if ((spsr & PSR_M_MASK) != PSR_M_EL0t ||
542 (spsr & (PSR_F | PSR_I | PSR_A | PSR_D)) != 0)
545 set_mcontext(td, &uc.uc_mcontext);
546 set_fpcontext(td, &uc.uc_mcontext);
548 /* Restore signal mask. */
549 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
551 return (EJUSTRETURN);
555 * Construct a PCB from a trapframe. This is called from kdb_trap() where
556 * we want to start a backtrace from the function that caused us to enter
557 * the debugger. We have the context in the trapframe, but base the trace
558 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
559 * enough for a backtrace.
562 makectx(struct trapframe *tf, struct pcb *pcb)
566 for (i = 0; i < PCB_LR; i++)
567 pcb->pcb_x[i] = tf->tf_x[i];
569 pcb->pcb_x[PCB_LR] = tf->tf_lr;
570 pcb->pcb_pc = tf->tf_elr;
571 pcb->pcb_sp = tf->tf_sp;
575 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
579 struct trapframe *tf;
580 struct sigframe *fp, frame;
582 struct sysentvec *sysent;
583 int code, onstack, sig;
587 PROC_LOCK_ASSERT(p, MA_OWNED);
589 sig = ksi->ksi_signo;
590 code = ksi->ksi_code;
592 mtx_assert(&psp->ps_mtx, MA_OWNED);
595 onstack = sigonstack(tf->tf_sp);
597 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
600 /* Allocate and validate space for the signal handler context. */
601 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack &&
602 SIGISMEMBER(psp->ps_sigonstack, sig)) {
603 fp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp +
604 td->td_sigstk.ss_size);
605 #if defined(COMPAT_43)
606 td->td_sigstk.ss_flags |= SS_ONSTACK;
609 fp = (struct sigframe *)td->td_frame->tf_sp;
612 /* Make room, keeping the stack aligned */
614 fp = (struct sigframe *)STACKALIGN(fp);
616 /* Fill in the frame to copy out */
617 get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
618 get_fpcontext(td, &frame.sf_uc.uc_mcontext);
619 frame.sf_si = ksi->ksi_info;
620 frame.sf_uc.uc_sigmask = *mask;
621 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
622 ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE;
623 frame.sf_uc.uc_stack = td->td_sigstk;
624 mtx_unlock(&psp->ps_mtx);
625 PROC_UNLOCK(td->td_proc);
627 /* Copy the sigframe out to the user's stack. */
628 if (copyout(&frame, fp, sizeof(*fp)) != 0) {
629 /* Process has trashed its stack. Kill it. */
630 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp);
636 tf->tf_x[1] = (register_t)&fp->sf_si;
637 tf->tf_x[2] = (register_t)&fp->sf_uc;
639 tf->tf_elr = (register_t)catcher;
640 tf->tf_sp = (register_t)fp;
641 sysent = p->p_sysent;
642 if (sysent->sv_sigcode_base != 0)
643 tf->tf_lr = (register_t)sysent->sv_sigcode_base;
645 tf->tf_lr = (register_t)(sysent->sv_psstrings -
646 *(sysent->sv_szsigcode));
648 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr,
652 mtx_lock(&psp->ps_mtx);
656 init_proc0(vm_offset_t kstack)
658 struct pcpu *pcpup = &__pcpu[0];
660 proc_linkup0(&proc0, &thread0);
661 thread0.td_kstack = kstack;
662 thread0.td_pcb = (struct pcb *)(thread0.td_kstack) - 1;
663 thread0.td_pcb->pcb_fpflags = 0;
664 thread0.td_pcb->pcb_fpusaved = &thread0.td_pcb->pcb_fpustate;
665 thread0.td_pcb->pcb_vfpcpu = UINT_MAX;
666 thread0.td_frame = &proc0_tf;
667 pcpup->pc_curpcb = thread0.td_pcb;
676 } EFI_MEMORY_DESCRIPTOR;
679 add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap,
682 u_int i, insert_idx, _physmap_idx;
684 _physmap_idx = *physmap_idxp;
690 * Find insertion point while checking for overlap. Start off by
691 * assuming the new entry will be added to the end.
693 insert_idx = _physmap_idx;
694 for (i = 0; i <= _physmap_idx; i += 2) {
695 if (base < physmap[i + 1]) {
696 if (base + length <= physmap[i]) {
700 if (boothowto & RB_VERBOSE)
702 "Overlapping memory regions, ignoring second region\n");
707 /* See if we can prepend to the next entry. */
708 if (insert_idx <= _physmap_idx &&
709 base + length == physmap[insert_idx]) {
710 physmap[insert_idx] = base;
714 /* See if we can append to the previous entry. */
715 if (insert_idx > 0 && base == physmap[insert_idx - 1]) {
716 physmap[insert_idx - 1] += length;
721 *physmap_idxp = _physmap_idx;
722 if (_physmap_idx == PHYSMAP_SIZE) {
724 "Too many segments in the physical address map, giving up\n");
729 * Move the last 'N' entries down to make room for the new
732 for (i = _physmap_idx; i > insert_idx; i -= 2) {
733 physmap[i] = physmap[i - 2];
734 physmap[i + 1] = physmap[i - 1];
737 /* Insert the new entry. */
738 physmap[insert_idx] = base;
739 physmap[insert_idx + 1] = base + length;
745 add_fdt_mem_regions(struct mem_region *mr, int mrcnt, vm_paddr_t *physmap,
749 for (int i = 0; i < mrcnt; i++) {
750 if (!add_physmap_entry(mr[i].mr_start, mr[i].mr_size, physmap,
758 add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap,
761 struct efi_md *map, *p;
766 static const char *types[] = {
772 "RuntimeServicesCode",
773 "RuntimeServicesData",
774 "ConventionalMemory",
779 "MemoryMappedIOPortSpace",
785 * Memory map data provided by UEFI via the GetMemoryMap
788 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
789 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
791 if (efihdr->descriptor_size == 0)
793 ndesc = efihdr->memory_size / efihdr->descriptor_size;
795 if (boothowto & RB_VERBOSE)
796 printf("%23s %12s %12s %8s %4s\n",
797 "Type", "Physical", "Virtual", "#Pages", "Attr");
799 for (i = 0, p = map; i < ndesc; i++,
800 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
801 if (boothowto & RB_VERBOSE) {
802 if (p->md_type < nitems(types))
803 type = types[p->md_type];
806 printf("%23s %012lx %12p %08lx ", type, p->md_phys,
807 p->md_virt, p->md_pages);
808 if (p->md_attr & EFI_MD_ATTR_UC)
810 if (p->md_attr & EFI_MD_ATTR_WC)
812 if (p->md_attr & EFI_MD_ATTR_WT)
814 if (p->md_attr & EFI_MD_ATTR_WB)
816 if (p->md_attr & EFI_MD_ATTR_UCE)
818 if (p->md_attr & EFI_MD_ATTR_WP)
820 if (p->md_attr & EFI_MD_ATTR_RP)
822 if (p->md_attr & EFI_MD_ATTR_XP)
824 if (p->md_attr & EFI_MD_ATTR_NV)
826 if (p->md_attr & EFI_MD_ATTR_MORE_RELIABLE)
827 printf("MORE_RELIABLE ");
828 if (p->md_attr & EFI_MD_ATTR_RO)
830 if (p->md_attr & EFI_MD_ATTR_RT)
835 switch (p->md_type) {
836 case EFI_MD_TYPE_CODE:
837 case EFI_MD_TYPE_DATA:
838 case EFI_MD_TYPE_BS_CODE:
839 case EFI_MD_TYPE_BS_DATA:
840 case EFI_MD_TYPE_FREE:
842 * We're allowed to use any entry with these types.
849 if (!add_physmap_entry(p->md_phys, (p->md_pages * PAGE_SIZE),
850 physmap, physmap_idxp))
857 try_load_dtb(caddr_t kmdp)
861 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
862 if (dtbp == (vm_offset_t)NULL) {
863 printf("ERROR loading DTB\n");
867 if (OF_install(OFW_FDT, 0) == FALSE)
868 panic("Cannot install FDT");
870 if (OF_init((void *)dtbp) != 0)
871 panic("OF_init failed with the found device tree");
878 bool has_acpi, has_fdt;
881 has_acpi = has_fdt = false;
884 has_fdt = (OF_peer(0) != 0);
887 has_acpi = (acpi_find_table(ACPI_SIG_SPCR) != 0);
890 env = kern_getenv("kern.cfg.order");
893 while (order != NULL) {
895 strncmp(order, "acpi", 4) == 0 &&
896 (order[4] == ',' || order[4] == '\0')) {
897 arm64_bus_method = ARM64_BUS_ACPI;
901 strncmp(order, "fdt", 3) == 0 &&
902 (order[3] == ',' || order[3] == '\0')) {
903 arm64_bus_method = ARM64_BUS_FDT;
906 order = strchr(order, ',');
910 /* If we set the bus method it is valid */
911 if (arm64_bus_method != ARM64_BUS_NONE)
914 /* If no order or an invalid order was set use the default */
915 if (arm64_bus_method == ARM64_BUS_NONE) {
917 arm64_bus_method = ARM64_BUS_FDT;
919 arm64_bus_method = ARM64_BUS_ACPI;
923 * If no option was set the default is valid, otherwise we are
924 * setting one to get cninit() working, then calling panic to tell
925 * the user about the invalid bus setup.
927 return (env == NULL);
933 int dcache_line_shift, icache_line_shift, dczva_line_shift;
937 ctr_el0 = READ_SPECIALREG(ctr_el0);
939 /* Read the log2 words in each D cache line */
940 dcache_line_shift = CTR_DLINE_SIZE(ctr_el0);
941 /* Get the D cache line size */
942 dcache_line_size = sizeof(int) << dcache_line_shift;
944 /* And the same for the I cache */
945 icache_line_shift = CTR_ILINE_SIZE(ctr_el0);
946 icache_line_size = sizeof(int) << icache_line_shift;
948 idcache_line_size = MIN(dcache_line_size, icache_line_size);
950 dczid_el0 = READ_SPECIALREG(dczid_el0);
952 /* Check if dc zva is not prohibited */
953 if (dczid_el0 & DCZID_DZP)
956 /* Same as with above calculations */
957 dczva_line_shift = DCZID_BS_SIZE(dczid_el0);
958 dczva_line_size = sizeof(int) << dczva_line_shift;
960 /* Change pagezero function */
961 pagezero = pagezero_cache;
966 initarm(struct arm64_bootparams *abp)
968 struct efi_map_header *efihdr;
971 struct mem_region mem_regions[FDT_MEM_REGIONS];
974 vm_offset_t lastaddr;
980 /* Set the module data location */
981 preload_metadata = (caddr_t)(uintptr_t)(abp->modulep);
983 /* Find the kernel address */
984 kmdp = preload_search_by_type("elf kernel");
986 kmdp = preload_search_by_type("elf64 kernel");
988 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
989 init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 0);
995 efi_systbl_phys = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t);
997 /* Find the address to start allocating from */
998 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
1000 /* Load the physical memory ranges */
1002 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
1003 MODINFO_METADATA | MODINFOMD_EFI_MAP);
1005 add_efi_map_entries(efihdr, physmap, &physmap_idx);
1008 /* Grab physical memory regions information from device tree. */
1009 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,
1011 panic("Cannot get physical memory regions");
1012 add_fdt_mem_regions(mem_regions, mem_regions_sz, physmap,
1017 /* Print the memory map */
1019 for (i = 0; i < physmap_idx; i += 2) {
1020 dump_avail[i] = physmap[i];
1021 dump_avail[i + 1] = physmap[i + 1];
1022 mem_len += physmap[i + 1] - physmap[i];
1025 dump_avail[i + 1] = 0;
1027 /* Set the pcpu data, this is needed by pmap_bootstrap */
1029 pcpu_init(pcpup, 0, sizeof(struct pcpu));
1032 * Set the pcpu pointer with a backup in tpidr_el1 to be
1033 * loaded when entering the kernel from userland.
1037 "msr tpidr_el1, %0" :: "r"(pcpup));
1039 PCPU_SET(curthread, &thread0);
1041 /* Do basic tuning, hz etc */
1047 /* Bootstrap enough of pmap to enter the kernel proper */
1048 pmap_bootstrap(abp->kern_l0pt, abp->kern_l1pt,
1049 KERNBASE - abp->kern_delta, lastaddr - KERNBASE);
1051 devmap_bootstrap(0, NULL);
1053 valid = bus_probe();
1058 panic("Invalid bus configuration: %s",
1059 kern_getenv("kern.cfg.order"));
1061 init_proc0(abp->kern_stack);
1062 msgbufinit(msgbufp, msgbufsize);
1064 init_param2(physmem);
1078 WRITE_SPECIALREG(OSLAR_EL1, 0);
1080 /* This permits DDB to use debug registers for watchpoints. */
1083 /* TODO: Eventually will need to initialize debug registers here. */
1087 #include <ddb/ddb.h>
1089 DB_SHOW_COMMAND(specialregs, db_show_spregs)
1091 #define PRINT_REG(reg) \
1092 db_printf(__STRING(reg) " = %#016lx\n", READ_SPECIALREG(reg))
1094 PRINT_REG(actlr_el1);
1095 PRINT_REG(afsr0_el1);
1096 PRINT_REG(afsr1_el1);
1097 PRINT_REG(aidr_el1);
1098 PRINT_REG(amair_el1);
1099 PRINT_REG(ccsidr_el1);
1100 PRINT_REG(clidr_el1);
1101 PRINT_REG(contextidr_el1);
1102 PRINT_REG(cpacr_el1);
1103 PRINT_REG(csselr_el1);
1105 PRINT_REG(currentel);
1107 PRINT_REG(dczid_el0);
1112 /* ARM64TODO: Enable VFP before reading floating-point registers */
1116 PRINT_REG(id_aa64afr0_el1);
1117 PRINT_REG(id_aa64afr1_el1);
1118 PRINT_REG(id_aa64dfr0_el1);
1119 PRINT_REG(id_aa64dfr1_el1);
1120 PRINT_REG(id_aa64isar0_el1);
1121 PRINT_REG(id_aa64isar1_el1);
1122 PRINT_REG(id_aa64pfr0_el1);
1123 PRINT_REG(id_aa64pfr1_el1);
1124 PRINT_REG(id_afr0_el1);
1125 PRINT_REG(id_dfr0_el1);
1126 PRINT_REG(id_isar0_el1);
1127 PRINT_REG(id_isar1_el1);
1128 PRINT_REG(id_isar2_el1);
1129 PRINT_REG(id_isar3_el1);
1130 PRINT_REG(id_isar4_el1);
1131 PRINT_REG(id_isar5_el1);
1132 PRINT_REG(id_mmfr0_el1);
1133 PRINT_REG(id_mmfr1_el1);
1134 PRINT_REG(id_mmfr2_el1);
1135 PRINT_REG(id_mmfr3_el1);
1137 /* Missing from llvm */
1138 PRINT_REG(id_mmfr4_el1);
1140 PRINT_REG(id_pfr0_el1);
1141 PRINT_REG(id_pfr1_el1);
1143 PRINT_REG(mair_el1);
1144 PRINT_REG(midr_el1);
1145 PRINT_REG(mpidr_el1);
1146 PRINT_REG(mvfr0_el1);
1147 PRINT_REG(mvfr1_el1);
1148 PRINT_REG(mvfr2_el1);
1149 PRINT_REG(revidr_el1);
1150 PRINT_REG(sctlr_el1);
1153 PRINT_REG(spsr_el1);
1155 PRINT_REG(tpidr_el0);
1156 PRINT_REG(tpidr_el1);
1157 PRINT_REG(tpidrro_el0);
1158 PRINT_REG(ttbr0_el1);
1159 PRINT_REG(ttbr1_el1);
1160 PRINT_REG(vbar_el1);
1164 DB_SHOW_COMMAND(vtop, db_show_vtop)
1169 phys = arm64_address_translate_s1e1r(addr);
1170 db_printf("EL1 physical address reg (read): 0x%016lx\n", phys);
1171 phys = arm64_address_translate_s1e1w(addr);
1172 db_printf("EL1 physical address reg (write): 0x%016lx\n", phys);
1173 phys = arm64_address_translate_s1e0r(addr);
1174 db_printf("EL0 physical address reg (read): 0x%016lx\n", phys);
1175 phys = arm64_address_translate_s1e0w(addr);
1176 db_printf("EL0 physical address reg (write): 0x%016lx\n", phys);
1178 db_printf("show vtop <virt_addr>\n");