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
28 #include "opt_platform.h"
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
41 #include <sys/imgact.h>
43 #include <sys/kernel.h>
44 #include <sys/limits.h>
45 #include <sys/linker.h>
46 #include <sys/msgbuf.h>
49 #include <sys/ptrace.h>
50 #include <sys/reboot.h>
51 #include <sys/rwlock.h>
52 #include <sys/sched.h>
53 #include <sys/signalvar.h>
54 #include <sys/syscallsubr.h>
55 #include <sys/sysent.h>
56 #include <sys/sysproto.h>
57 #include <sys/ucontext.h>
60 #include <vm/vm_kern.h>
61 #include <vm/vm_object.h>
62 #include <vm/vm_page.h>
64 #include <vm/vm_map.h>
65 #include <vm/vm_pager.h>
67 #include <machine/armreg.h>
68 #include <machine/cpu.h>
69 #include <machine/debug_monitor.h>
70 #include <machine/kdb.h>
71 #include <machine/devmap.h>
72 #include <machine/machdep.h>
73 #include <machine/metadata.h>
74 #include <machine/pcb.h>
75 #include <machine/reg.h>
76 #include <machine/vmparam.h>
79 #include <machine/vfp.h>
83 #include <dev/fdt/fdt_common.h>
84 #include <dev/ofw/openfirm.h>
87 struct pcpu __pcpu[MAXCPU];
89 static struct trapframe proc0_tf;
91 vm_paddr_t phys_avail[PHYS_AVAIL_SIZE + 2];
92 vm_paddr_t dump_avail[PHYS_AVAIL_SIZE + 2];
99 #define PHYSMAP_SIZE (2 * (VM_PHYSSEG_MAX - 1))
100 vm_paddr_t physmap[PHYSMAP_SIZE];
103 struct kva_md_info kmi;
105 int64_t dcache_line_size; /* The minimum D cache line size */
106 int64_t icache_line_size; /* The minimum I cache line size */
107 int64_t idcache_line_size; /* The minimum cache line size */
110 cpu_startup(void *dummy)
115 vm_ksubmap_init(&kmi);
117 vm_pager_bufferinit();
120 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
123 cpu_idle_wakeup(int cpu)
130 bzero(void *buf, size_t len)
140 fill_regs(struct thread *td, struct reg *regs)
142 struct trapframe *frame;
144 frame = td->td_frame;
145 regs->sp = frame->tf_sp;
146 regs->lr = frame->tf_lr;
147 regs->elr = frame->tf_elr;
148 regs->spsr = frame->tf_spsr;
150 memcpy(regs->x, frame->tf_x, sizeof(regs->x));
156 set_regs(struct thread *td, struct reg *regs)
158 struct trapframe *frame;
160 frame = td->td_frame;
161 frame->tf_sp = regs->sp;
162 frame->tf_lr = regs->lr;
163 frame->tf_elr = regs->elr;
164 frame->tf_spsr = regs->spsr;
166 memcpy(frame->tf_x, regs->x, sizeof(frame->tf_x));
172 fill_fpregs(struct thread *td, struct fpreg *regs)
178 if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
180 * If we have just been running VFP instructions we will
181 * need to save the state to memcpy it below.
185 memcpy(regs->fp_q, pcb->pcb_vfp, sizeof(regs->fp_q));
186 regs->fp_cr = pcb->pcb_fpcr;
187 regs->fp_sr = pcb->pcb_fpsr;
190 memset(regs->fp_q, 0, sizeof(regs->fp_q));
195 set_fpregs(struct thread *td, struct fpreg *regs)
201 memcpy(pcb->pcb_vfp, regs->fp_q, sizeof(regs->fp_q));
202 pcb->pcb_fpcr = regs->fp_cr;
203 pcb->pcb_fpsr = regs->fp_sr;
209 fill_dbregs(struct thread *td, struct dbreg *regs)
212 panic("ARM64TODO: fill_dbregs");
216 set_dbregs(struct thread *td, struct dbreg *regs)
219 panic("ARM64TODO: set_dbregs");
223 ptrace_set_pc(struct thread *td, u_long addr)
226 panic("ARM64TODO: ptrace_set_pc");
231 ptrace_single_step(struct thread *td)
239 ptrace_clear_single_step(struct thread *td)
247 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
249 struct trapframe *tf = td->td_frame;
251 memset(tf, 0, sizeof(struct trapframe));
254 tf->tf_lr = imgp->entry_addr;
255 tf->tf_elr = imgp->entry_addr;
258 /* Sanity check these are the same size, they will be memcpy'd to and fro */
259 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
260 sizeof((struct gpregs *)0)->gp_x);
261 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
262 sizeof((struct reg *)0)->x);
265 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
267 struct trapframe *tf = td->td_frame;
269 if (clear_ret & GET_MC_CLEAR_RET) {
270 mcp->mc_gpregs.gp_x[0] = 0;
271 mcp->mc_gpregs.gp_spsr = tf->tf_spsr & ~PSR_C;
273 mcp->mc_gpregs.gp_x[0] = tf->tf_x[0];
274 mcp->mc_gpregs.gp_spsr = tf->tf_spsr;
277 memcpy(&mcp->mc_gpregs.gp_x[1], &tf->tf_x[1],
278 sizeof(mcp->mc_gpregs.gp_x[1]) * (nitems(mcp->mc_gpregs.gp_x) - 1));
280 mcp->mc_gpregs.gp_sp = tf->tf_sp;
281 mcp->mc_gpregs.gp_lr = tf->tf_lr;
282 mcp->mc_gpregs.gp_elr = tf->tf_elr;
288 set_mcontext(struct thread *td, mcontext_t *mcp)
290 struct trapframe *tf = td->td_frame;
292 memcpy(tf->tf_x, mcp->mc_gpregs.gp_x, sizeof(tf->tf_x));
294 tf->tf_sp = mcp->mc_gpregs.gp_sp;
295 tf->tf_lr = mcp->mc_gpregs.gp_lr;
296 tf->tf_elr = mcp->mc_gpregs.gp_elr;
297 tf->tf_spsr = mcp->mc_gpregs.gp_spsr;
303 get_fpcontext(struct thread *td, mcontext_t *mcp)
310 curpcb = curthread->td_pcb;
312 if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
314 * If we have just been running VFP instructions we will
315 * need to save the state to memcpy it below.
319 memcpy(mcp->mc_fpregs.fp_q, curpcb->pcb_vfp,
320 sizeof(mcp->mc_fpregs));
321 mcp->mc_fpregs.fp_cr = curpcb->pcb_fpcr;
322 mcp->mc_fpregs.fp_sr = curpcb->pcb_fpsr;
323 mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags;
324 mcp->mc_flags |= _MC_FP_VALID;
332 set_fpcontext(struct thread *td, mcontext_t *mcp)
339 if ((mcp->mc_flags & _MC_FP_VALID) != 0) {
340 curpcb = curthread->td_pcb;
343 * Discard any vfp state for the current thread, we
344 * are about to override it.
348 memcpy(curpcb->pcb_vfp, mcp->mc_fpregs.fp_q,
349 sizeof(mcp->mc_fpregs));
350 curpcb->pcb_fpcr = mcp->mc_fpregs.fp_cr;
351 curpcb->pcb_fpsr = mcp->mc_fpregs.fp_sr;
352 curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags;
366 if (!sched_runnable())
379 /* We should have shutdown by now, if not enter a low power sleep */
382 __asm __volatile("wfi");
387 * Flush the D-cache for non-DMA I/O so that the I-cache can
388 * be made coherent later.
391 cpu_flush_dcache(void *ptr, size_t len)
397 /* Get current clock frequency for the given CPU ID. */
399 cpu_est_clockrate(int cpu_id, uint64_t *rate)
402 panic("ARM64TODO: cpu_est_clockrate");
406 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
409 pcpu->pc_acpi_id = 0xffffffff;
419 if (td->td_md.md_spinlock_count == 0) {
420 daif = intr_disable();
421 td->td_md.md_spinlock_count = 1;
422 td->td_md.md_saved_daif = daif;
424 td->td_md.md_spinlock_count++;
436 daif = td->td_md.md_saved_daif;
437 td->td_md.md_spinlock_count--;
438 if (td->td_md.md_spinlock_count == 0)
442 #ifndef _SYS_SYSPROTO_H_
443 struct sigreturn_args {
449 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
456 if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
459 spsr = uc.uc_mcontext.mc_gpregs.gp_spsr;
460 if ((spsr & PSR_M_MASK) != PSR_M_EL0t ||
461 (spsr & (PSR_F | PSR_I | PSR_A | PSR_D)) != 0)
464 set_mcontext(td, &uc.uc_mcontext);
465 set_fpcontext(td, &uc.uc_mcontext);
467 /* Restore signal mask. */
468 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
470 return (EJUSTRETURN);
474 * Construct a PCB from a trapframe. This is called from kdb_trap() where
475 * we want to start a backtrace from the function that caused us to enter
476 * the debugger. We have the context in the trapframe, but base the trace
477 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
478 * enough for a backtrace.
481 makectx(struct trapframe *tf, struct pcb *pcb)
485 for (i = 0; i < PCB_LR; i++)
486 pcb->pcb_x[i] = tf->tf_x[i];
488 pcb->pcb_x[PCB_LR] = tf->tf_lr;
489 pcb->pcb_pc = tf->tf_elr;
490 pcb->pcb_sp = tf->tf_sp;
494 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
498 struct trapframe *tf;
499 struct sigframe *fp, frame;
501 int code, onstack, sig;
505 PROC_LOCK_ASSERT(p, MA_OWNED);
507 sig = ksi->ksi_signo;
508 code = ksi->ksi_code;
510 mtx_assert(&psp->ps_mtx, MA_OWNED);
513 onstack = sigonstack(tf->tf_sp);
515 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
518 /* Allocate and validate space for the signal handler context. */
519 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack &&
520 SIGISMEMBER(psp->ps_sigonstack, sig)) {
521 fp = (struct sigframe *)(td->td_sigstk.ss_sp +
522 td->td_sigstk.ss_size);
523 #if defined(COMPAT_43)
524 td->td_sigstk.ss_flags |= SS_ONSTACK;
527 fp = (struct sigframe *)td->td_frame->tf_sp;
530 /* Make room, keeping the stack aligned */
532 fp = (struct sigframe *)STACKALIGN(fp);
534 /* Fill in the frame to copy out */
535 get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
536 get_fpcontext(td, &frame.sf_uc.uc_mcontext);
537 frame.sf_si = ksi->ksi_info;
538 frame.sf_uc.uc_sigmask = *mask;
539 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
540 ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE;
541 frame.sf_uc.uc_stack = td->td_sigstk;
542 mtx_unlock(&psp->ps_mtx);
543 PROC_UNLOCK(td->td_proc);
545 /* Copy the sigframe out to the user's stack. */
546 if (copyout(&frame, fp, sizeof(*fp)) != 0) {
547 /* Process has trashed its stack. Kill it. */
548 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp);
554 tf->tf_x[1] = (register_t)&fp->sf_si;
555 tf->tf_x[2] = (register_t)&fp->sf_uc;
557 tf->tf_elr = (register_t)catcher;
558 tf->tf_sp = (register_t)fp;
559 tf->tf_lr = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode));
561 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr,
565 mtx_lock(&psp->ps_mtx);
569 init_proc0(vm_offset_t kstack)
571 struct pcpu *pcpup = &__pcpu[0];
573 proc_linkup0(&proc0, &thread0);
574 thread0.td_kstack = kstack;
575 thread0.td_pcb = (struct pcb *)(thread0.td_kstack) - 1;
576 thread0.td_pcb->pcb_fpflags = 0;
577 thread0.td_pcb->pcb_vfpcpu = UINT_MAX;
578 thread0.td_frame = &proc0_tf;
579 pcpup->pc_curpcb = thread0.td_pcb;
588 } EFI_MEMORY_DESCRIPTOR;
591 add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap,
594 u_int i, insert_idx, _physmap_idx;
596 _physmap_idx = *physmap_idxp;
602 * Find insertion point while checking for overlap. Start off by
603 * assuming the new entry will be added to the end.
605 insert_idx = _physmap_idx;
606 for (i = 0; i <= _physmap_idx; i += 2) {
607 if (base < physmap[i + 1]) {
608 if (base + length <= physmap[i]) {
612 if (boothowto & RB_VERBOSE)
614 "Overlapping memory regions, ignoring second region\n");
619 /* See if we can prepend to the next entry. */
620 if (insert_idx <= _physmap_idx &&
621 base + length == physmap[insert_idx]) {
622 physmap[insert_idx] = base;
626 /* See if we can append to the previous entry. */
627 if (insert_idx > 0 && base == physmap[insert_idx - 1]) {
628 physmap[insert_idx - 1] += length;
633 *physmap_idxp = _physmap_idx;
634 if (_physmap_idx == PHYSMAP_SIZE) {
636 "Too many segments in the physical address map, giving up\n");
641 * Move the last 'N' entries down to make room for the new
644 for (i = _physmap_idx; i > insert_idx; i -= 2) {
645 physmap[i] = physmap[i - 2];
646 physmap[i + 1] = physmap[i - 1];
649 /* Insert the new entry. */
650 physmap[insert_idx] = base;
651 physmap[insert_idx + 1] = base + length;
655 #define efi_next_descriptor(ptr, size) \
656 ((struct efi_md *)(((uint8_t *) ptr) + size))
659 add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap,
662 struct efi_md *map, *p;
667 static const char *types[] = {
673 "RuntimeServicesCode",
674 "RuntimeServicesData",
675 "ConventionalMemory",
680 "MemoryMappedIOPortSpace",
685 * Memory map data provided by UEFI via the GetMemoryMap
688 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
689 map = (struct efi_md *)((uint8_t *)efihdr + efisz);
691 if (efihdr->descriptor_size == 0)
693 ndesc = efihdr->memory_size / efihdr->descriptor_size;
695 if (boothowto & RB_VERBOSE)
696 printf("%23s %12s %12s %8s %4s\n",
697 "Type", "Physical", "Virtual", "#Pages", "Attr");
699 for (i = 0, p = map; i < ndesc; i++,
700 p = efi_next_descriptor(p, efihdr->descriptor_size)) {
701 if (boothowto & RB_VERBOSE) {
702 if (p->md_type <= EFI_MD_TYPE_PALCODE)
703 type = types[p->md_type];
706 printf("%23s %012lx %12p %08lx ", type, p->md_phys,
707 p->md_virt, p->md_pages);
708 if (p->md_attr & EFI_MD_ATTR_UC)
710 if (p->md_attr & EFI_MD_ATTR_WC)
712 if (p->md_attr & EFI_MD_ATTR_WT)
714 if (p->md_attr & EFI_MD_ATTR_WB)
716 if (p->md_attr & EFI_MD_ATTR_UCE)
718 if (p->md_attr & EFI_MD_ATTR_WP)
720 if (p->md_attr & EFI_MD_ATTR_RP)
722 if (p->md_attr & EFI_MD_ATTR_XP)
724 if (p->md_attr & EFI_MD_ATTR_RT)
729 switch (p->md_type) {
730 case EFI_MD_TYPE_CODE:
731 case EFI_MD_TYPE_DATA:
732 case EFI_MD_TYPE_BS_CODE:
733 case EFI_MD_TYPE_BS_DATA:
734 case EFI_MD_TYPE_FREE:
736 * We're allowed to use any entry with these types.
743 if (!add_physmap_entry(p->md_phys, (p->md_pages * PAGE_SIZE),
744 physmap, physmap_idxp))
751 try_load_dtb(caddr_t kmdp)
755 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
756 if (dtbp == (vm_offset_t)NULL) {
757 printf("ERROR loading DTB\n");
761 if (OF_install(OFW_FDT, 0) == FALSE)
762 panic("Cannot install FDT");
764 if (OF_init((void *)dtbp) != 0)
765 panic("OF_init failed with the found device tree");
772 int dcache_line_shift, icache_line_shift;
775 ctr_el0 = READ_SPECIALREG(ctr_el0);
777 /* Read the log2 words in each D cache line */
778 dcache_line_shift = CTR_DLINE_SIZE(ctr_el0);
779 /* Get the D cache line size */
780 dcache_line_size = sizeof(int) << dcache_line_shift;
782 /* And the same for the I cache */
783 icache_line_shift = CTR_ILINE_SIZE(ctr_el0);
784 icache_line_size = sizeof(int) << icache_line_shift;
786 idcache_line_size = MIN(dcache_line_size, icache_line_size);
790 initarm(struct arm64_bootparams *abp)
792 struct efi_map_header *efihdr;
794 vm_offset_t lastaddr;
799 /* Set the module data location */
800 preload_metadata = (caddr_t)(uintptr_t)(abp->modulep);
802 /* Find the kernel address */
803 kmdp = preload_search_by_type("elf kernel");
805 kmdp = preload_search_by_type("elf64 kernel");
807 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
808 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
814 /* Find the address to start allocating from */
815 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
817 /* Load the physical memory ranges */
819 efihdr = (struct efi_map_header *)preload_search_info(kmdp,
820 MODINFO_METADATA | MODINFOMD_EFI_MAP);
821 add_efi_map_entries(efihdr, physmap, &physmap_idx);
823 /* Print the memory map */
825 for (i = 0; i < physmap_idx; i += 2)
826 mem_len += physmap[i + 1] - physmap[i];
828 /* Set the pcpu data, this is needed by pmap_bootstrap */
830 pcpu_init(pcpup, 0, sizeof(struct pcpu));
833 * Set the pcpu pointer with a backup in tpidr_el1 to be
834 * loaded when entering the kernel from userland.
838 "msr tpidr_el1, %0" :: "r"(pcpup));
840 PCPU_SET(curthread, &thread0);
842 /* Do basic tuning, hz etc */
847 /* Bootstrap enough of pmap to enter the kernel proper */
848 pmap_bootstrap(abp->kern_l1pt, KERNBASE - abp->kern_delta,
849 lastaddr - KERNBASE);
851 arm_devmap_bootstrap(0, NULL);
855 init_proc0(abp->kern_stack);
856 msgbufinit(msgbufp, msgbufsize);
858 init_param2(physmem);