2 * Copyright (c) 2014 Andrew Turner
3 * Copyright (c) 2015-2017 Ruslan Bukin <br@bsdpad.com>
6 * Portions of this software were developed by SRI International and the
7 * University of Cambridge Computer Laboratory under DARPA/AFRL contract
8 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
10 * Portions of this software were developed by the University of Cambridge
11 * Computer Laboratory as part of the CTSRD Project, with support from the
12 * UK Higher Education Innovation Fund (HEIF).
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include "opt_platform.h"
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
41 #include <sys/param.h>
42 #include <sys/systm.h>
47 #include <sys/devmap.h>
49 #include <sys/imgact.h>
51 #include <sys/kernel.h>
53 #include <sys/limits.h>
54 #include <sys/linker.h>
55 #include <sys/msgbuf.h>
58 #include <sys/ptrace.h>
59 #include <sys/reboot.h>
60 #include <sys/rwlock.h>
61 #include <sys/sched.h>
62 #include <sys/signalvar.h>
63 #include <sys/syscallsubr.h>
64 #include <sys/sysent.h>
65 #include <sys/sysproto.h>
66 #include <sys/tslog.h>
67 #include <sys/ucontext.h>
68 #include <sys/vmmeter.h>
71 #include <vm/vm_param.h>
72 #include <vm/vm_kern.h>
73 #include <vm/vm_object.h>
74 #include <vm/vm_page.h>
75 #include <vm/vm_phys.h>
77 #include <vm/vm_map.h>
78 #include <vm/vm_pager.h>
80 #include <machine/cpu.h>
81 #include <machine/intr.h>
82 #include <machine/kdb.h>
83 #include <machine/machdep.h>
84 #include <machine/pcb.h>
85 #include <machine/reg.h>
86 #include <machine/riscvreg.h>
87 #include <machine/sbi.h>
88 #include <machine/trap.h>
89 #include <machine/vmparam.h>
92 #include <machine/fpe.h>
96 #include <dev/fdt/fdt_common.h>
97 #include <dev/ofw/openfirm.h>
100 static void get_fpcontext(struct thread *td, mcontext_t *mcp);
101 static void set_fpcontext(struct thread *td, mcontext_t *mcp);
103 struct pcpu __pcpu[MAXCPU];
105 static struct trapframe proc0_tf;
112 #define DTB_SIZE_MAX (1024 * 1024)
114 vm_paddr_t physmap[PHYS_AVAIL_ENTRIES];
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 */
123 uint32_t boot_hart; /* The hart we booted on. */
129 cpu_startup(void *dummy)
135 printf("real memory = %ju (%ju MB)\n", ptoa((uintmax_t)realmem),
136 ptoa((uintmax_t)realmem) / (1024 * 1024));
139 * Display any holes after the first chunk of extended memory.
144 printf("Physical memory chunk(s):\n");
145 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
148 size = phys_avail[indx + 1] - phys_avail[indx];
150 "0x%016jx - 0x%016jx, %ju bytes (%ju pages)\n",
151 (uintmax_t)phys_avail[indx],
152 (uintmax_t)phys_avail[indx + 1] - 1,
153 (uintmax_t)size, (uintmax_t)size / PAGE_SIZE);
157 vm_ksubmap_init(&kmi);
159 printf("avail memory = %ju (%ju MB)\n",
160 ptoa((uintmax_t)vm_free_count()),
161 ptoa((uintmax_t)vm_free_count()) / (1024 * 1024));
163 devmap_print_table();
166 vm_pager_bufferinit();
169 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
172 cpu_idle_wakeup(int cpu)
179 fill_regs(struct thread *td, struct reg *regs)
181 struct trapframe *frame;
183 frame = td->td_frame;
184 regs->sepc = frame->tf_sepc;
185 regs->sstatus = frame->tf_sstatus;
186 regs->ra = frame->tf_ra;
187 regs->sp = frame->tf_sp;
188 regs->gp = frame->tf_gp;
189 regs->tp = frame->tf_tp;
191 memcpy(regs->t, frame->tf_t, sizeof(regs->t));
192 memcpy(regs->s, frame->tf_s, sizeof(regs->s));
193 memcpy(regs->a, frame->tf_a, sizeof(regs->a));
199 set_regs(struct thread *td, struct reg *regs)
201 struct trapframe *frame;
203 frame = td->td_frame;
204 frame->tf_sepc = regs->sepc;
205 frame->tf_ra = regs->ra;
206 frame->tf_sp = regs->sp;
207 frame->tf_gp = regs->gp;
208 frame->tf_tp = regs->tp;
210 memcpy(frame->tf_t, regs->t, sizeof(frame->tf_t));
211 memcpy(frame->tf_s, regs->s, sizeof(frame->tf_s));
212 memcpy(frame->tf_a, regs->a, sizeof(frame->tf_a));
218 fill_fpregs(struct thread *td, struct fpreg *regs)
225 if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
227 * If we have just been running FPE instructions we will
228 * need to save the state to memcpy it below.
233 memcpy(regs->fp_x, pcb->pcb_x, sizeof(regs->fp_x));
234 regs->fp_fcsr = pcb->pcb_fcsr;
237 memset(regs, 0, sizeof(*regs));
243 set_fpregs(struct thread *td, struct fpreg *regs)
246 struct trapframe *frame;
249 frame = td->td_frame;
252 memcpy(pcb->pcb_x, regs->fp_x, sizeof(regs->fp_x));
253 pcb->pcb_fcsr = regs->fp_fcsr;
254 pcb->pcb_fpflags |= PCB_FP_STARTED;
255 frame->tf_sstatus &= ~SSTATUS_FS_MASK;
256 frame->tf_sstatus |= SSTATUS_FS_CLEAN;
263 fill_dbregs(struct thread *td, struct dbreg *regs)
266 panic("fill_dbregs");
270 set_dbregs(struct thread *td, struct dbreg *regs)
277 ptrace_set_pc(struct thread *td, u_long addr)
280 td->td_frame->tf_sepc = addr;
285 ptrace_single_step(struct thread *td)
293 ptrace_clear_single_step(struct thread *td)
301 exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack)
303 struct trapframe *tf;
309 memset(tf, 0, sizeof(struct trapframe));
312 tf->tf_sp = STACKALIGN(stack);
313 tf->tf_ra = imgp->entry_addr;
314 tf->tf_sepc = imgp->entry_addr;
316 pcb->pcb_fpflags &= ~PCB_FP_STARTED;
319 /* Sanity check these are the same size, they will be memcpy'd to and fro */
320 CTASSERT(sizeof(((struct trapframe *)0)->tf_a) ==
321 sizeof((struct gpregs *)0)->gp_a);
322 CTASSERT(sizeof(((struct trapframe *)0)->tf_s) ==
323 sizeof((struct gpregs *)0)->gp_s);
324 CTASSERT(sizeof(((struct trapframe *)0)->tf_t) ==
325 sizeof((struct gpregs *)0)->gp_t);
326 CTASSERT(sizeof(((struct trapframe *)0)->tf_a) ==
327 sizeof((struct reg *)0)->a);
328 CTASSERT(sizeof(((struct trapframe *)0)->tf_s) ==
329 sizeof((struct reg *)0)->s);
330 CTASSERT(sizeof(((struct trapframe *)0)->tf_t) ==
331 sizeof((struct reg *)0)->t);
333 /* Support for FDT configurations only. */
337 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
339 struct trapframe *tf = td->td_frame;
341 memcpy(mcp->mc_gpregs.gp_t, tf->tf_t, sizeof(mcp->mc_gpregs.gp_t));
342 memcpy(mcp->mc_gpregs.gp_s, tf->tf_s, sizeof(mcp->mc_gpregs.gp_s));
343 memcpy(mcp->mc_gpregs.gp_a, tf->tf_a, sizeof(mcp->mc_gpregs.gp_a));
345 if (clear_ret & GET_MC_CLEAR_RET) {
346 mcp->mc_gpregs.gp_a[0] = 0;
347 mcp->mc_gpregs.gp_t[0] = 0; /* clear syscall error */
350 mcp->mc_gpregs.gp_ra = tf->tf_ra;
351 mcp->mc_gpregs.gp_sp = tf->tf_sp;
352 mcp->mc_gpregs.gp_gp = tf->tf_gp;
353 mcp->mc_gpregs.gp_tp = tf->tf_tp;
354 mcp->mc_gpregs.gp_sepc = tf->tf_sepc;
355 mcp->mc_gpregs.gp_sstatus = tf->tf_sstatus;
356 get_fpcontext(td, mcp);
362 set_mcontext(struct thread *td, mcontext_t *mcp)
364 struct trapframe *tf;
369 * Permit changes to the USTATUS bits of SSTATUS.
371 * Ignore writes to read-only bits (SD, XS).
373 * Ignore writes to the FS field as set_fpcontext() will set
376 if (((mcp->mc_gpregs.gp_sstatus ^ tf->tf_sstatus) &
377 ~(SSTATUS_SD | SSTATUS_XS_MASK | SSTATUS_FS_MASK | SSTATUS_UPIE |
381 memcpy(tf->tf_t, mcp->mc_gpregs.gp_t, sizeof(tf->tf_t));
382 memcpy(tf->tf_s, mcp->mc_gpregs.gp_s, sizeof(tf->tf_s));
383 memcpy(tf->tf_a, mcp->mc_gpregs.gp_a, sizeof(tf->tf_a));
385 tf->tf_ra = mcp->mc_gpregs.gp_ra;
386 tf->tf_sp = mcp->mc_gpregs.gp_sp;
387 tf->tf_gp = mcp->mc_gpregs.gp_gp;
388 tf->tf_sepc = mcp->mc_gpregs.gp_sepc;
389 tf->tf_sstatus = mcp->mc_gpregs.gp_sstatus;
390 set_fpcontext(td, mcp);
396 get_fpcontext(struct thread *td, mcontext_t *mcp)
403 curpcb = curthread->td_pcb;
405 KASSERT(td->td_pcb == curpcb, ("Invalid fpe pcb"));
407 if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
409 * If we have just been running FPE instructions we will
410 * need to save the state to memcpy it below.
414 KASSERT((curpcb->pcb_fpflags & ~PCB_FP_USERMASK) == 0,
415 ("Non-userspace FPE flags set in get_fpcontext"));
416 memcpy(mcp->mc_fpregs.fp_x, curpcb->pcb_x,
417 sizeof(mcp->mc_fpregs));
418 mcp->mc_fpregs.fp_fcsr = curpcb->pcb_fcsr;
419 mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags;
420 mcp->mc_flags |= _MC_FP_VALID;
428 set_fpcontext(struct thread *td, mcontext_t *mcp)
434 td->td_frame->tf_sstatus &= ~SSTATUS_FS_MASK;
435 td->td_frame->tf_sstatus |= SSTATUS_FS_OFF;
440 if ((mcp->mc_flags & _MC_FP_VALID) != 0) {
441 curpcb = curthread->td_pcb;
442 /* FPE usage is enabled, override registers. */
443 memcpy(curpcb->pcb_x, mcp->mc_fpregs.fp_x,
444 sizeof(mcp->mc_fpregs));
445 curpcb->pcb_fcsr = mcp->mc_fpregs.fp_fcsr;
446 curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags & PCB_FP_USERMASK;
447 td->td_frame->tf_sstatus |= SSTATUS_FS_CLEAN;
461 if (!sched_runnable())
476 __asm __volatile("wfi");
480 * Flush the D-cache for non-DMA I/O so that the I-cache can
481 * be made coherent later.
484 cpu_flush_dcache(void *ptr, size_t len)
490 /* Get current clock frequency for the given CPU ID. */
492 cpu_est_clockrate(int cpu_id, uint64_t *rate)
495 panic("cpu_est_clockrate");
499 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
510 if (td->td_md.md_spinlock_count == 0) {
511 reg = intr_disable();
512 td->td_md.md_spinlock_count = 1;
513 td->td_md.md_saved_sstatus_ie = reg;
516 td->td_md.md_spinlock_count++;
523 register_t sstatus_ie;
526 sstatus_ie = td->td_md.md_saved_sstatus_ie;
527 td->td_md.md_spinlock_count--;
528 if (td->td_md.md_spinlock_count == 0) {
530 intr_restore(sstatus_ie);
534 #ifndef _SYS_SYSPROTO_H_
535 struct sigreturn_args {
541 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
546 if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
549 error = set_mcontext(td, &uc.uc_mcontext);
553 /* Restore signal mask. */
554 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
556 return (EJUSTRETURN);
560 * Construct a PCB from a trapframe. This is called from kdb_trap() where
561 * we want to start a backtrace from the function that caused us to enter
562 * the debugger. We have the context in the trapframe, but base the trace
563 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
564 * enough for a backtrace.
567 makectx(struct trapframe *tf, struct pcb *pcb)
570 memcpy(pcb->pcb_s, tf->tf_s, sizeof(tf->tf_s));
572 pcb->pcb_ra = tf->tf_sepc;
573 pcb->pcb_sp = tf->tf_sp;
574 pcb->pcb_gp = tf->tf_gp;
575 pcb->pcb_tp = tf->tf_tp;
579 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
581 struct sigframe *fp, frame;
582 struct sysentvec *sysent;
583 struct trapframe *tf;
592 PROC_LOCK_ASSERT(p, MA_OWNED);
594 sig = ksi->ksi_signo;
596 mtx_assert(&psp->ps_mtx, MA_OWNED);
599 onstack = sigonstack(tf->tf_sp);
601 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
604 /* Allocate and validate space for the signal handler context. */
605 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack &&
606 SIGISMEMBER(psp->ps_sigonstack, sig)) {
607 fp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp +
608 td->td_sigstk.ss_size);
610 fp = (struct sigframe *)td->td_frame->tf_sp;
613 /* Make room, keeping the stack aligned */
615 fp = (struct sigframe *)STACKALIGN(fp);
617 /* Fill in the frame to copy out */
618 bzero(&frame, sizeof(frame));
619 get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
620 frame.sf_si = ksi->ksi_info;
621 frame.sf_uc.uc_sigmask = *mask;
622 frame.sf_uc.uc_stack = td->td_sigstk;
623 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) != 0 ?
624 (onstack ? SS_ONSTACK : 0) : SS_DISABLE;
625 mtx_unlock(&psp->ps_mtx);
626 PROC_UNLOCK(td->td_proc);
628 /* Copy the sigframe out to the user's stack. */
629 if (copyout(&frame, fp, sizeof(*fp)) != 0) {
630 /* Process has trashed its stack. Kill it. */
631 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp);
637 tf->tf_a[1] = (register_t)&fp->sf_si;
638 tf->tf_a[2] = (register_t)&fp->sf_uc;
640 tf->tf_sepc = (register_t)catcher;
641 tf->tf_sp = (register_t)fp;
643 sysent = p->p_sysent;
644 if (sysent->sv_sigcode_base != 0)
645 tf->tf_ra = (register_t)sysent->sv_sigcode_base;
647 tf->tf_ra = (register_t)(sysent->sv_psstrings -
648 *(sysent->sv_szsigcode));
650 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_sepc,
654 mtx_lock(&psp->ps_mtx);
658 init_proc0(vm_offset_t kstack)
664 proc_linkup0(&proc0, &thread0);
665 thread0.td_kstack = kstack;
666 thread0.td_kstack_pages = KSTACK_PAGES;
667 thread0.td_pcb = (struct pcb *)(thread0.td_kstack +
668 thread0.td_kstack_pages * PAGE_SIZE) - 1;
669 thread0.td_pcb->pcb_fpflags = 0;
670 thread0.td_frame = &proc0_tf;
671 pcpup->pc_curpcb = thread0.td_pcb;
675 add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap,
678 u_int i, insert_idx, _physmap_idx;
680 _physmap_idx = *physmap_idxp;
686 * Find insertion point while checking for overlap. Start off by
687 * assuming the new entry will be added to the end.
689 insert_idx = _physmap_idx;
690 for (i = 0; i <= _physmap_idx; i += 2) {
691 if (base < physmap[i + 1]) {
692 if (base + length <= physmap[i]) {
696 if (boothowto & RB_VERBOSE)
698 "Overlapping memory regions, ignoring second region\n");
703 /* See if we can prepend to the next entry. */
704 if (insert_idx <= _physmap_idx &&
705 base + length == physmap[insert_idx]) {
706 physmap[insert_idx] = base;
710 /* See if we can append to the previous entry. */
711 if (insert_idx > 0 && base == physmap[insert_idx - 1]) {
712 physmap[insert_idx - 1] += length;
717 *physmap_idxp = _physmap_idx;
718 if (_physmap_idx == PHYS_AVAIL_ENTRIES) {
720 "Too many segments in the physical address map, giving up\n");
725 * Move the last 'N' entries down to make room for the new
728 for (i = _physmap_idx; i > insert_idx; i -= 2) {
729 physmap[i] = physmap[i - 2];
730 physmap[i + 1] = physmap[i - 1];
733 /* Insert the new entry. */
734 physmap[insert_idx] = base;
735 physmap[insert_idx + 1] = base + length;
737 printf("physmap[%d] = 0x%016lx\n", insert_idx, base);
738 printf("physmap[%d] = 0x%016lx\n", insert_idx + 1, base + length);
744 try_load_dtb(caddr_t kmdp, vm_offset_t dtbp)
747 #if defined(FDT_DTB_STATIC)
748 dtbp = (vm_offset_t)&fdt_static_dtb;
751 if (dtbp == (vm_offset_t)NULL) {
752 printf("ERROR loading DTB\n");
756 if (OF_install(OFW_FDT, 0) == FALSE)
757 panic("Cannot install FDT");
759 if (OF_init((void *)dtbp) != 0)
760 panic("OF_init failed with the found device tree");
770 dcache_line_size = 0;
771 icache_line_size = 0;
772 idcache_line_size = 0;
776 * Fake up a boot descriptor table.
777 * RISCVTODO: This needs to be done via loader (when it's available).
780 fake_preload_metadata(struct riscv_bootparams *rvbp __unused)
782 static uint32_t fake_preload[35];
784 vm_offset_t zstart = 0, zend = 0;
786 vm_offset_t lastaddr;
791 fake_preload[i++] = MODINFO_NAME;
792 fake_preload[i++] = strlen("kernel") + 1;
793 strcpy((char*)&fake_preload[i++], "kernel");
795 fake_preload[i++] = MODINFO_TYPE;
796 fake_preload[i++] = strlen("elf64 kernel") + 1;
797 strcpy((char*)&fake_preload[i++], "elf64 kernel");
799 fake_preload[i++] = MODINFO_ADDR;
800 fake_preload[i++] = sizeof(vm_offset_t);
801 *(vm_offset_t *)&fake_preload[i++] =
802 (vm_offset_t)(KERNBASE + KERNENTRY);
804 fake_preload[i++] = MODINFO_SIZE;
805 fake_preload[i++] = sizeof(vm_offset_t);
806 fake_preload[i++] = (vm_offset_t)&end -
807 (vm_offset_t)(KERNBASE + KERNENTRY);
812 if (*(uint32_t *)KERNVIRTADDR == MAGIC_TRAMP_NUMBER) {
813 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_SSYM;
814 fake_preload[i++] = sizeof(vm_offset_t);
815 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 4);
816 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_ESYM;
817 fake_preload[i++] = sizeof(vm_offset_t);
818 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 8);
819 lastaddr = *(uint32_t *)(KERNVIRTADDR + 8);
821 zstart = *(uint32_t *)(KERNVIRTADDR + 4);
822 db_fetch_ksymtab(zstart, zend);
826 lastaddr = (vm_offset_t)&end;
827 fake_preload[i++] = 0;
829 preload_metadata = (void *)fake_preload;
835 initriscv(struct riscv_bootparams *rvbp)
837 struct mem_region mem_regions[FDT_MEM_REGIONS];
839 vm_offset_t rstart, rend;
842 vm_offset_t lastaddr;
847 TSRAW(&thread0, TS_ENTER, __func__, NULL);
849 /* Set the pcpu data, this is needed by pmap_bootstrap */
851 pcpu_init(pcpup, 0, sizeof(struct pcpu));
852 pcpup->pc_hart = boot_hart;
854 /* Set the pcpu pointer */
855 __asm __volatile("mv tp, %0" :: "r"(pcpup));
857 PCPU_SET(curthread, &thread0);
859 /* Initialize SBI interface. */
862 /* Set the module data location */
863 lastaddr = fake_preload_metadata(rvbp);
865 /* Find the kernel address */
866 kmdp = preload_search_by_type("elf kernel");
868 kmdp = preload_search_by_type("elf64 kernel");
870 boothowto = RB_VERBOSE | RB_SINGLE;
871 boothowto = RB_VERBOSE;
876 try_load_dtb(kmdp, rvbp->dtbp_virt);
879 /* Load the physical memory ranges */
883 /* Grab physical memory regions information from device tree. */
884 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz, NULL) != 0)
885 panic("Cannot get physical memory regions");
888 e = s + DTB_SIZE_MAX;
890 for (i = 0; i < mem_regions_sz; i++) {
891 rstart = mem_regions[i].mr_start;
892 rend = (mem_regions[i].mr_start + mem_regions[i].mr_size);
894 if ((rstart < s) && (rend > e)) {
895 /* Exclude DTB region. */
896 add_physmap_entry(rstart, (s - rstart), physmap, &physmap_idx);
897 add_physmap_entry(e, (rend - e), physmap, &physmap_idx);
899 add_physmap_entry(mem_regions[i].mr_start,
900 mem_regions[i].mr_size, physmap, &physmap_idx);
905 /* Do basic tuning, hz etc */
910 /* Bootstrap enough of pmap to enter the kernel proper */
911 kernlen = (lastaddr - KERNBASE);
912 pmap_bootstrap(rvbp->kern_l1pt, mem_regions[0].mr_start, kernlen);
914 /* Establish static device mappings */
915 devmap_bootstrap(0, NULL);
919 init_proc0(rvbp->kern_stack);
921 msgbufinit(msgbufp, msgbufsize);
923 init_param2(physmem);
933 bzero(void *buf, size_t len)