diff options
Diffstat (limited to 'sys/arm64/arm64/machdep.c')
| -rw-r--r-- | sys/arm64/arm64/machdep.c | 1374 |
1 files changed, 1374 insertions, 0 deletions
diff --git a/sys/arm64/arm64/machdep.c b/sys/arm64/arm64/machdep.c new file mode 100644 index 000000000000..423adac08208 --- /dev/null +++ b/sys/arm64/arm64/machdep.c @@ -0,0 +1,1374 @@ +/*- + * Copyright (c) 2014 Andrew Turner + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#include "opt_acpi.h" +#include "opt_platform.h" +#include "opt_ddb.h" + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/buf.h> +#include <sys/bus.h> +#include <sys/cons.h> +#include <sys/cpu.h> +#include <sys/csan.h> +#include <sys/devmap.h> +#include <sys/efi.h> +#include <sys/exec.h> +#include <sys/imgact.h> +#include <sys/kdb.h> +#include <sys/kernel.h> +#include <sys/ktr.h> +#include <sys/limits.h> +#include <sys/linker.h> +#include <sys/msgbuf.h> +#include <sys/pcpu.h> +#include <sys/physmem.h> +#include <sys/proc.h> +#include <sys/ptrace.h> +#include <sys/reboot.h> +#include <sys/rwlock.h> +#include <sys/sched.h> +#include <sys/signalvar.h> +#include <sys/syscallsubr.h> +#include <sys/sysent.h> +#include <sys/sysproto.h> +#include <sys/ucontext.h> +#include <sys/vdso.h> +#include <sys/vmmeter.h> + +#include <vm/vm.h> +#include <vm/vm_param.h> +#include <vm/vm_kern.h> +#include <vm/vm_object.h> +#include <vm/vm_page.h> +#include <vm/vm_phys.h> +#include <vm/pmap.h> +#include <vm/vm_map.h> +#include <vm/vm_pager.h> + +#include <machine/armreg.h> +#include <machine/cpu.h> +#include <machine/debug_monitor.h> +#include <machine/kdb.h> +#include <machine/machdep.h> +#include <machine/metadata.h> +#include <machine/md_var.h> +#include <machine/pcb.h> +#include <machine/reg.h> +#include <machine/undefined.h> +#include <machine/vmparam.h> + +#ifdef VFP +#include <machine/vfp.h> +#endif + +#ifdef DEV_ACPI +#include <contrib/dev/acpica/include/acpi.h> +#include <machine/acpica_machdep.h> +#endif + +#ifdef FDT +#include <dev/fdt/fdt_common.h> +#include <dev/ofw/openfirm.h> +#endif + +static void get_fpcontext(struct thread *td, mcontext_t *mcp); +static void set_fpcontext(struct thread *td, mcontext_t *mcp); + +enum arm64_bus arm64_bus_method = ARM64_BUS_NONE; + +struct pcpu __pcpu[MAXCPU]; + +static struct trapframe proc0_tf; + +int early_boot = 1; +int cold = 1; +static int boot_el; + +struct kva_md_info kmi; + +int64_t dczva_line_size; /* The size of cache line the dc zva zeroes */ +int has_pan; + +/* + * Physical address of the EFI System Table. Stashed from the metadata hints + * passed into the kernel and used by the EFI code to call runtime services. + */ +vm_paddr_t efi_systbl_phys; +static struct efi_map_header *efihdr; + +/* pagezero_* implementations are provided in support.S */ +void pagezero_simple(void *); +void pagezero_cache(void *); + +/* pagezero_simple is default pagezero */ +void (*pagezero)(void *p) = pagezero_simple; + +int (*apei_nmi)(void); + +static void +pan_setup(void) +{ + uint64_t id_aa64mfr1; + + id_aa64mfr1 = READ_SPECIALREG(id_aa64mmfr1_el1); + if (ID_AA64MMFR1_PAN_VAL(id_aa64mfr1) != ID_AA64MMFR1_PAN_NONE) + has_pan = 1; +} + +void +pan_enable(void) +{ + + /* + * The LLVM integrated assembler doesn't understand the PAN + * PSTATE field. Because of this we need to manually create + * the instruction in an asm block. This is equivalent to: + * msr pan, #1 + * + * This sets the PAN bit, stopping the kernel from accessing + * memory when userspace can also access it unless the kernel + * uses the userspace load/store instructions. + */ + if (has_pan) { + WRITE_SPECIALREG(sctlr_el1, + READ_SPECIALREG(sctlr_el1) & ~SCTLR_SPAN); + __asm __volatile(".inst 0xd500409f | (0x1 << 8)"); + } +} + +bool +has_hyp(void) +{ + + return (boot_el == 2); +} + +static void +cpu_startup(void *dummy) +{ + vm_paddr_t size; + int i; + + printf("real memory = %ju (%ju MB)\n", ptoa((uintmax_t)realmem), + ptoa((uintmax_t)realmem) / 1024 / 1024); + + if (bootverbose) { + printf("Physical memory chunk(s):\n"); + for (i = 0; phys_avail[i + 1] != 0; i += 2) { + size = phys_avail[i + 1] - phys_avail[i]; + printf("%#016jx - %#016jx, %ju bytes (%ju pages)\n", + (uintmax_t)phys_avail[i], + (uintmax_t)phys_avail[i + 1] - 1, + (uintmax_t)size, (uintmax_t)size / PAGE_SIZE); + } + } + + printf("avail memory = %ju (%ju MB)\n", + ptoa((uintmax_t)vm_free_count()), + ptoa((uintmax_t)vm_free_count()) / 1024 / 1024); + + undef_init(); + install_cpu_errata(); + + vm_ksubmap_init(&kmi); + bufinit(); + vm_pager_bufferinit(); +} + +SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); + +static void +late_ifunc_resolve(void *dummy __unused) +{ + link_elf_late_ireloc(); +} +SYSINIT(late_ifunc_resolve, SI_SUB_CPU, SI_ORDER_ANY, late_ifunc_resolve, NULL); + +int +cpu_idle_wakeup(int cpu) +{ + + return (0); +} + +int +fill_regs(struct thread *td, struct reg *regs) +{ + struct trapframe *frame; + + frame = td->td_frame; + regs->sp = frame->tf_sp; + regs->lr = frame->tf_lr; + regs->elr = frame->tf_elr; + regs->spsr = frame->tf_spsr; + + memcpy(regs->x, frame->tf_x, sizeof(regs->x)); + +#ifdef COMPAT_FREEBSD32 + /* + * We may be called here for a 32bits process, if we're using a + * 64bits debugger. If so, put PC and SPSR where it expects it. + */ + if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { + regs->x[15] = frame->tf_elr; + regs->x[16] = frame->tf_spsr; + } +#endif + return (0); +} + +int +set_regs(struct thread *td, struct reg *regs) +{ + struct trapframe *frame; + + frame = td->td_frame; + frame->tf_sp = regs->sp; + frame->tf_lr = regs->lr; + frame->tf_elr = regs->elr; + frame->tf_spsr &= ~PSR_FLAGS; + frame->tf_spsr |= regs->spsr & PSR_FLAGS; + + memcpy(frame->tf_x, regs->x, sizeof(frame->tf_x)); + +#ifdef COMPAT_FREEBSD32 + if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { + /* + * We may be called for a 32bits process if we're using + * a 64bits debugger. If so, get PC and SPSR from where + * it put it. + */ + frame->tf_elr = regs->x[15]; + frame->tf_spsr = regs->x[16] & PSR_FLAGS; + } +#endif + return (0); +} + +int +fill_fpregs(struct thread *td, struct fpreg *regs) +{ +#ifdef VFP + struct pcb *pcb; + + pcb = td->td_pcb; + if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) { + /* + * If we have just been running VFP instructions we will + * need to save the state to memcpy it below. + */ + if (td == curthread) + vfp_save_state(td, pcb); + + KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate, + ("Called fill_fpregs while the kernel is using the VFP")); + memcpy(regs->fp_q, pcb->pcb_fpustate.vfp_regs, + sizeof(regs->fp_q)); + regs->fp_cr = pcb->pcb_fpustate.vfp_fpcr; + regs->fp_sr = pcb->pcb_fpustate.vfp_fpsr; + } else +#endif + memset(regs, 0, sizeof(*regs)); + return (0); +} + +int +set_fpregs(struct thread *td, struct fpreg *regs) +{ +#ifdef VFP + struct pcb *pcb; + + pcb = td->td_pcb; + KASSERT(pcb->pcb_fpusaved == &pcb->pcb_fpustate, + ("Called set_fpregs while the kernel is using the VFP")); + memcpy(pcb->pcb_fpustate.vfp_regs, regs->fp_q, sizeof(regs->fp_q)); + pcb->pcb_fpustate.vfp_fpcr = regs->fp_cr; + pcb->pcb_fpustate.vfp_fpsr = regs->fp_sr; +#endif + return (0); +} + +int +fill_dbregs(struct thread *td, struct dbreg *regs) +{ + struct debug_monitor_state *monitor; + int count, i; + uint8_t debug_ver, nbkpts; + + memset(regs, 0, sizeof(*regs)); + + extract_user_id_field(ID_AA64DFR0_EL1, ID_AA64DFR0_DebugVer_SHIFT, + &debug_ver); + extract_user_id_field(ID_AA64DFR0_EL1, ID_AA64DFR0_BRPs_SHIFT, + &nbkpts); + + /* + * The BRPs field contains the number of breakpoints - 1. Armv8-A + * allows the hardware to provide 2-16 breakpoints so this won't + * overflow an 8 bit value. + */ + count = nbkpts + 1; + + regs->db_info = debug_ver; + regs->db_info <<= 8; + regs->db_info |= count; + + monitor = &td->td_pcb->pcb_dbg_regs; + if ((monitor->dbg_flags & DBGMON_ENABLED) != 0) { + for (i = 0; i < count; i++) { + regs->db_regs[i].dbr_addr = monitor->dbg_bvr[i]; + regs->db_regs[i].dbr_ctrl = monitor->dbg_bcr[i]; + } + } + + return (0); +} + +int +set_dbregs(struct thread *td, struct dbreg *regs) +{ + struct debug_monitor_state *monitor; + int count; + int i; + + monitor = &td->td_pcb->pcb_dbg_regs; + count = 0; + monitor->dbg_enable_count = 0; + for (i = 0; i < DBG_BRP_MAX; i++) { + /* TODO: Check these values */ + monitor->dbg_bvr[i] = regs->db_regs[i].dbr_addr; + monitor->dbg_bcr[i] = regs->db_regs[i].dbr_ctrl; + if ((monitor->dbg_bcr[i] & 1) != 0) + monitor->dbg_enable_count++; + } + if (monitor->dbg_enable_count > 0) + monitor->dbg_flags |= DBGMON_ENABLED; + + return (0); +} + +#ifdef COMPAT_FREEBSD32 +int +fill_regs32(struct thread *td, struct reg32 *regs) +{ + int i; + struct trapframe *tf; + + tf = td->td_frame; + for (i = 0; i < 13; i++) + regs->r[i] = tf->tf_x[i]; + /* For arm32, SP is r13 and LR is r14 */ + regs->r_sp = tf->tf_x[13]; + regs->r_lr = tf->tf_x[14]; + regs->r_pc = tf->tf_elr; + regs->r_cpsr = tf->tf_spsr; + + return (0); +} + +int +set_regs32(struct thread *td, struct reg32 *regs) +{ + int i; + struct trapframe *tf; + + tf = td->td_frame; + for (i = 0; i < 13; i++) + tf->tf_x[i] = regs->r[i]; + /* For arm 32, SP is r13 an LR is r14 */ + tf->tf_x[13] = regs->r_sp; + tf->tf_x[14] = regs->r_lr; + tf->tf_elr = regs->r_pc; + tf->tf_spsr = regs->r_cpsr; + + + return (0); +} + +int +fill_fpregs32(struct thread *td, struct fpreg32 *regs) +{ + + printf("ARM64TODO: fill_fpregs32"); + return (EDOOFUS); +} + +int +set_fpregs32(struct thread *td, struct fpreg32 *regs) +{ + + printf("ARM64TODO: set_fpregs32"); + return (EDOOFUS); +} + +int +fill_dbregs32(struct thread *td, struct dbreg32 *regs) +{ + + printf("ARM64TODO: fill_dbregs32"); + return (EDOOFUS); +} + +int +set_dbregs32(struct thread *td, struct dbreg32 *regs) +{ + + printf("ARM64TODO: set_dbregs32"); + return (EDOOFUS); +} +#endif + +int +ptrace_set_pc(struct thread *td, u_long addr) +{ + + td->td_frame->tf_elr = addr; + return (0); +} + +int +ptrace_single_step(struct thread *td) +{ + + td->td_frame->tf_spsr |= PSR_SS; + td->td_pcb->pcb_flags |= PCB_SINGLE_STEP; + return (0); +} + +int +ptrace_clear_single_step(struct thread *td) +{ + + td->td_frame->tf_spsr &= ~PSR_SS; + td->td_pcb->pcb_flags &= ~PCB_SINGLE_STEP; + return (0); +} + +void +exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack) +{ + struct trapframe *tf = td->td_frame; + + memset(tf, 0, sizeof(struct trapframe)); + + tf->tf_x[0] = stack; + tf->tf_sp = STACKALIGN(stack); + tf->tf_lr = imgp->entry_addr; + tf->tf_elr = imgp->entry_addr; +} + +/* Sanity check these are the same size, they will be memcpy'd to and fro */ +CTASSERT(sizeof(((struct trapframe *)0)->tf_x) == + sizeof((struct gpregs *)0)->gp_x); +CTASSERT(sizeof(((struct trapframe *)0)->tf_x) == + sizeof((struct reg *)0)->x); + +int +get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret) +{ + struct trapframe *tf = td->td_frame; + + if (clear_ret & GET_MC_CLEAR_RET) { + mcp->mc_gpregs.gp_x[0] = 0; + mcp->mc_gpregs.gp_spsr = tf->tf_spsr & ~PSR_C; + } else { + mcp->mc_gpregs.gp_x[0] = tf->tf_x[0]; + mcp->mc_gpregs.gp_spsr = tf->tf_spsr; + } + + memcpy(&mcp->mc_gpregs.gp_x[1], &tf->tf_x[1], + sizeof(mcp->mc_gpregs.gp_x[1]) * (nitems(mcp->mc_gpregs.gp_x) - 1)); + + mcp->mc_gpregs.gp_sp = tf->tf_sp; + mcp->mc_gpregs.gp_lr = tf->tf_lr; + mcp->mc_gpregs.gp_elr = tf->tf_elr; + get_fpcontext(td, mcp); + + return (0); +} + +int +set_mcontext(struct thread *td, mcontext_t *mcp) +{ + struct trapframe *tf = td->td_frame; + uint32_t spsr; + + spsr = mcp->mc_gpregs.gp_spsr; + if ((spsr & PSR_M_MASK) != PSR_M_EL0t || + (spsr & PSR_AARCH32) != 0 || + (spsr & PSR_DAIF) != (td->td_frame->tf_spsr & PSR_DAIF)) + return (EINVAL); + + memcpy(tf->tf_x, mcp->mc_gpregs.gp_x, sizeof(tf->tf_x)); + + tf->tf_sp = mcp->mc_gpregs.gp_sp; + tf->tf_lr = mcp->mc_gpregs.gp_lr; + tf->tf_elr = mcp->mc_gpregs.gp_elr; + tf->tf_spsr = mcp->mc_gpregs.gp_spsr; + set_fpcontext(td, mcp); + + return (0); +} + +static void +get_fpcontext(struct thread *td, mcontext_t *mcp) +{ +#ifdef VFP + struct pcb *curpcb; + + critical_enter(); + + curpcb = curthread->td_pcb; + + if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) { + /* + * If we have just been running VFP instructions we will + * need to save the state to memcpy it below. + */ + vfp_save_state(td, curpcb); + + KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate, + ("Called get_fpcontext while the kernel is using the VFP")); + KASSERT((curpcb->pcb_fpflags & ~PCB_FP_USERMASK) == 0, + ("Non-userspace FPU flags set in get_fpcontext")); + memcpy(mcp->mc_fpregs.fp_q, curpcb->pcb_fpustate.vfp_regs, + sizeof(mcp->mc_fpregs)); + mcp->mc_fpregs.fp_cr = curpcb->pcb_fpustate.vfp_fpcr; + mcp->mc_fpregs.fp_sr = curpcb->pcb_fpustate.vfp_fpsr; + mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags; + mcp->mc_flags |= _MC_FP_VALID; + } + + critical_exit(); +#endif +} + +static void +set_fpcontext(struct thread *td, mcontext_t *mcp) +{ +#ifdef VFP + struct pcb *curpcb; + + critical_enter(); + + if ((mcp->mc_flags & _MC_FP_VALID) != 0) { + curpcb = curthread->td_pcb; + + /* + * Discard any vfp state for the current thread, we + * are about to override it. + */ + vfp_discard(td); + + KASSERT(curpcb->pcb_fpusaved == &curpcb->pcb_fpustate, + ("Called set_fpcontext while the kernel is using the VFP")); + memcpy(curpcb->pcb_fpustate.vfp_regs, mcp->mc_fpregs.fp_q, + sizeof(mcp->mc_fpregs)); + curpcb->pcb_fpustate.vfp_fpcr = mcp->mc_fpregs.fp_cr; + curpcb->pcb_fpustate.vfp_fpsr = mcp->mc_fpregs.fp_sr; + curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags & PCB_FP_USERMASK; + } + + critical_exit(); +#endif +} + +void +cpu_idle(int busy) +{ + + spinlock_enter(); + if (!busy) + cpu_idleclock(); + if (!sched_runnable()) + __asm __volatile( + "dsb sy \n" + "wfi \n"); + if (!busy) + cpu_activeclock(); + spinlock_exit(); +} + +void +cpu_halt(void) +{ + + /* We should have shutdown by now, if not enter a low power sleep */ + intr_disable(); + while (1) { + __asm __volatile("wfi"); + } +} + +/* + * Flush the D-cache for non-DMA I/O so that the I-cache can + * be made coherent later. + */ +void +cpu_flush_dcache(void *ptr, size_t len) +{ + + /* ARM64TODO TBD */ +} + +/* Get current clock frequency for the given CPU ID. */ +int +cpu_est_clockrate(int cpu_id, uint64_t *rate) +{ + struct pcpu *pc; + + pc = pcpu_find(cpu_id); + if (pc == NULL || rate == NULL) + return (EINVAL); + + if (pc->pc_clock == 0) + return (EOPNOTSUPP); + + *rate = pc->pc_clock; + return (0); +} + +void +cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) +{ + + pcpu->pc_acpi_id = 0xffffffff; +} + +void +spinlock_enter(void) +{ + struct thread *td; + register_t daif; + + td = curthread; + if (td->td_md.md_spinlock_count == 0) { + daif = intr_disable(); + td->td_md.md_spinlock_count = 1; + td->td_md.md_saved_daif = daif; + critical_enter(); + } else + td->td_md.md_spinlock_count++; +} + +void +spinlock_exit(void) +{ + struct thread *td; + register_t daif; + + td = curthread; + daif = td->td_md.md_saved_daif; + td->td_md.md_spinlock_count--; + if (td->td_md.md_spinlock_count == 0) { + critical_exit(); + intr_restore(daif); + } +} + +#ifndef _SYS_SYSPROTO_H_ +struct sigreturn_args { + ucontext_t *ucp; +}; +#endif + +int +sys_sigreturn(struct thread *td, struct sigreturn_args *uap) +{ + ucontext_t uc; + int error; + + if (copyin(uap->sigcntxp, &uc, sizeof(uc))) + return (EFAULT); + + error = set_mcontext(td, &uc.uc_mcontext); + if (error != 0) + return (error); + + /* Restore signal mask. */ + kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); + + return (EJUSTRETURN); +} + +/* + * Construct a PCB from a trapframe. This is called from kdb_trap() where + * we want to start a backtrace from the function that caused us to enter + * the debugger. We have the context in the trapframe, but base the trace + * on the PCB. The PCB doesn't have to be perfect, as long as it contains + * enough for a backtrace. + */ +void +makectx(struct trapframe *tf, struct pcb *pcb) +{ + int i; + + for (i = 0; i < PCB_LR; i++) + pcb->pcb_x[i] = tf->tf_x[i]; + + pcb->pcb_x[PCB_LR] = tf->tf_lr; + pcb->pcb_pc = tf->tf_elr; + pcb->pcb_sp = tf->tf_sp; +} + +void +sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) +{ + struct thread *td; + struct proc *p; + struct trapframe *tf; + struct sigframe *fp, frame; + struct sigacts *psp; + struct sysentvec *sysent; + int onstack, sig; + + td = curthread; + p = td->td_proc; + PROC_LOCK_ASSERT(p, MA_OWNED); + + sig = ksi->ksi_signo; + psp = p->p_sigacts; + mtx_assert(&psp->ps_mtx, MA_OWNED); + + tf = td->td_frame; + onstack = sigonstack(tf->tf_sp); + + CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, + catcher, sig); + + /* Allocate and validate space for the signal handler context. */ + if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack && + SIGISMEMBER(psp->ps_sigonstack, sig)) { + fp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp + + td->td_sigstk.ss_size); +#if defined(COMPAT_43) + td->td_sigstk.ss_flags |= SS_ONSTACK; +#endif + } else { + fp = (struct sigframe *)td->td_frame->tf_sp; + } + + /* Make room, keeping the stack aligned */ + fp--; + fp = (struct sigframe *)STACKALIGN(fp); + + /* Fill in the frame to copy out */ + bzero(&frame, sizeof(frame)); + get_mcontext(td, &frame.sf_uc.uc_mcontext, 0); + frame.sf_si = ksi->ksi_info; + frame.sf_uc.uc_sigmask = *mask; + frame.sf_uc.uc_stack = td->td_sigstk; + frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) != 0 ? + (onstack ? SS_ONSTACK : 0) : SS_DISABLE; + mtx_unlock(&psp->ps_mtx); + PROC_UNLOCK(td->td_proc); + + /* Copy the sigframe out to the user's stack. */ + if (copyout(&frame, fp, sizeof(*fp)) != 0) { + /* Process has trashed its stack. Kill it. */ + CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp); + PROC_LOCK(p); + sigexit(td, SIGILL); + } + + tf->tf_x[0]= sig; + tf->tf_x[1] = (register_t)&fp->sf_si; + tf->tf_x[2] = (register_t)&fp->sf_uc; + + tf->tf_elr = (register_t)catcher; + tf->tf_sp = (register_t)fp; + sysent = p->p_sysent; + if (sysent->sv_sigcode_base != 0) + tf->tf_lr = (register_t)sysent->sv_sigcode_base; + else + tf->tf_lr = (register_t)(sysent->sv_psstrings - + *(sysent->sv_szsigcode)); + + CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr, + tf->tf_sp); + + PROC_LOCK(p); + mtx_lock(&psp->ps_mtx); +} + +static void +init_proc0(vm_offset_t kstack) +{ + struct pcpu *pcpup = &__pcpu[0]; + + proc_linkup0(&proc0, &thread0); + thread0.td_kstack = kstack; + thread0.td_kstack_pages = KSTACK_PAGES; + thread0.td_pcb = (struct pcb *)(thread0.td_kstack + + thread0.td_kstack_pages * PAGE_SIZE) - 1; + thread0.td_pcb->pcb_fpflags = 0; + thread0.td_pcb->pcb_fpusaved = &thread0.td_pcb->pcb_fpustate; + thread0.td_pcb->pcb_vfpcpu = UINT_MAX; + thread0.td_frame = &proc0_tf; + pcpup->pc_curpcb = thread0.td_pcb; +} + +typedef struct { + uint32_t type; + uint64_t phys_start; + uint64_t virt_start; + uint64_t num_pages; + uint64_t attr; +} EFI_MEMORY_DESCRIPTOR; + +typedef void (*efi_map_entry_cb)(struct efi_md *); + +static void +foreach_efi_map_entry(struct efi_map_header *efihdr, efi_map_entry_cb cb) +{ + struct efi_md *map, *p; + size_t efisz; + int ndesc, i; + + /* + * Memory map data provided by UEFI via the GetMemoryMap + * Boot Services API. + */ + efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf; + map = (struct efi_md *)((uint8_t *)efihdr + efisz); + + if (efihdr->descriptor_size == 0) + return; + ndesc = efihdr->memory_size / efihdr->descriptor_size; + + for (i = 0, p = map; i < ndesc; i++, + p = efi_next_descriptor(p, efihdr->descriptor_size)) { + cb(p); + } +} + +static void +exclude_efi_map_entry(struct efi_md *p) +{ + + switch (p->md_type) { + case EFI_MD_TYPE_CODE: + case EFI_MD_TYPE_DATA: + case EFI_MD_TYPE_BS_CODE: + case EFI_MD_TYPE_BS_DATA: + case EFI_MD_TYPE_FREE: + /* + * We're allowed to use any entry with these types. + */ + break; + default: + physmem_exclude_region(p->md_phys, p->md_pages * PAGE_SIZE, + EXFLAG_NOALLOC); + } +} + +static void +exclude_efi_map_entries(struct efi_map_header *efihdr) +{ + + foreach_efi_map_entry(efihdr, exclude_efi_map_entry); +} + +static void +add_efi_map_entry(struct efi_md *p) +{ + + switch (p->md_type) { + case EFI_MD_TYPE_RT_DATA: + /* + * Runtime data will be excluded after the DMAP + * region is created to stop it from being added + * to phys_avail. + */ + case EFI_MD_TYPE_CODE: + case EFI_MD_TYPE_DATA: + case EFI_MD_TYPE_BS_CODE: + case EFI_MD_TYPE_BS_DATA: + case EFI_MD_TYPE_FREE: + /* + * We're allowed to use any entry with these types. + */ + physmem_hardware_region(p->md_phys, + p->md_pages * PAGE_SIZE); + break; + } +} + +static void +add_efi_map_entries(struct efi_map_header *efihdr) +{ + + foreach_efi_map_entry(efihdr, add_efi_map_entry); +} + +static void +print_efi_map_entry(struct efi_md *p) +{ + const char *type; + static const char *types[] = { + "Reserved", + "LoaderCode", + "LoaderData", + "BootServicesCode", + "BootServicesData", + "RuntimeServicesCode", + "RuntimeServicesData", + "ConventionalMemory", + "UnusableMemory", + "ACPIReclaimMemory", + "ACPIMemoryNVS", + "MemoryMappedIO", + "MemoryMappedIOPortSpace", + "PalCode", + "PersistentMemory" + }; + + if (p->md_type < nitems(types)) + type = types[p->md_type]; + else + type = "<INVALID>"; + printf("%23s %012lx %12p %08lx ", type, p->md_phys, + p->md_virt, p->md_pages); + if (p->md_attr & EFI_MD_ATTR_UC) + printf("UC "); + if (p->md_attr & EFI_MD_ATTR_WC) + printf("WC "); + if (p->md_attr & EFI_MD_ATTR_WT) + printf("WT "); + if (p->md_attr & EFI_MD_ATTR_WB) + printf("WB "); + if (p->md_attr & EFI_MD_ATTR_UCE) + printf("UCE "); + if (p->md_attr & EFI_MD_ATTR_WP) + printf("WP "); + if (p->md_attr & EFI_MD_ATTR_RP) + printf("RP "); + if (p->md_attr & EFI_MD_ATTR_XP) + printf("XP "); + if (p->md_attr & EFI_MD_ATTR_NV) + printf("NV "); + if (p->md_attr & EFI_MD_ATTR_MORE_RELIABLE) + printf("MORE_RELIABLE "); + if (p->md_attr & EFI_MD_ATTR_RO) + printf("RO "); + if (p->md_attr & EFI_MD_ATTR_RT) + printf("RUNTIME"); + printf("\n"); +} + +static void +print_efi_map_entries(struct efi_map_header *efihdr) +{ + + printf("%23s %12s %12s %8s %4s\n", + "Type", "Physical", "Virtual", "#Pages", "Attr"); + foreach_efi_map_entry(efihdr, print_efi_map_entry); +} + +#ifdef FDT +static void +try_load_dtb(caddr_t kmdp) +{ + vm_offset_t dtbp; + + dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); +#if defined(FDT_DTB_STATIC) + /* + * In case the device tree blob was not retrieved (from metadata) try + * to use the statically embedded one. + */ + if (dtbp == 0) + dtbp = (vm_offset_t)&fdt_static_dtb; +#endif + + if (dtbp == (vm_offset_t)NULL) { + printf("ERROR loading DTB\n"); + return; + } + + if (OF_install(OFW_FDT, 0) == FALSE) + panic("Cannot install FDT"); + + if (OF_init((void *)dtbp) != 0) + panic("OF_init failed with the found device tree"); + + parse_fdt_bootargs(); +} +#endif + +static bool +bus_probe(void) +{ + bool has_acpi, has_fdt; + char *order, *env; + + has_acpi = has_fdt = false; + +#ifdef FDT + has_fdt = (OF_peer(0) != 0); +#endif +#ifdef DEV_ACPI + has_acpi = (acpi_find_table(ACPI_SIG_SPCR) != 0); +#endif + + env = kern_getenv("kern.cfg.order"); + if (env != NULL) { + order = env; + while (order != NULL) { + if (has_acpi && + strncmp(order, "acpi", 4) == 0 && + (order[4] == ',' || order[4] == '\0')) { + arm64_bus_method = ARM64_BUS_ACPI; + break; + } + if (has_fdt && + strncmp(order, "fdt", 3) == 0 && + (order[3] == ',' || order[3] == '\0')) { + arm64_bus_method = ARM64_BUS_FDT; + break; + } + order = strchr(order, ','); + } + freeenv(env); + + /* If we set the bus method it is valid */ + if (arm64_bus_method != ARM64_BUS_NONE) + return (true); + } + /* If no order or an invalid order was set use the default */ + if (arm64_bus_method == ARM64_BUS_NONE) { + if (has_fdt) + arm64_bus_method = ARM64_BUS_FDT; + else if (has_acpi) + arm64_bus_method = ARM64_BUS_ACPI; + } + + /* + * If no option was set the default is valid, otherwise we are + * setting one to get cninit() working, then calling panic to tell + * the user about the invalid bus setup. + */ + return (env == NULL); +} + +static void +cache_setup(void) +{ + int dczva_line_shift; + uint32_t dczid_el0; + + identify_cache(READ_SPECIALREG(ctr_el0)); + + dczid_el0 = READ_SPECIALREG(dczid_el0); + + /* Check if dc zva is not prohibited */ + if (dczid_el0 & DCZID_DZP) + dczva_line_size = 0; + else { + /* Same as with above calculations */ + dczva_line_shift = DCZID_BS_SIZE(dczid_el0); + dczva_line_size = sizeof(int) << dczva_line_shift; + + /* Change pagezero function */ + pagezero = pagezero_cache; + } +} + +int +memory_mapping_mode(vm_paddr_t pa) +{ + struct efi_md *map, *p; + size_t efisz; + int ndesc, i; + + if (efihdr == NULL) + return (VM_MEMATTR_WRITE_BACK); + + /* + * Memory map data provided by UEFI via the GetMemoryMap + * Boot Services API. + */ + efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf; + map = (struct efi_md *)((uint8_t *)efihdr + efisz); + + if (efihdr->descriptor_size == 0) + return (VM_MEMATTR_WRITE_BACK); + ndesc = efihdr->memory_size / efihdr->descriptor_size; + + for (i = 0, p = map; i < ndesc; i++, + p = efi_next_descriptor(p, efihdr->descriptor_size)) { + if (pa < p->md_phys || + pa >= p->md_phys + p->md_pages * EFI_PAGE_SIZE) + continue; + if (p->md_type == EFI_MD_TYPE_IOMEM || + p->md_type == EFI_MD_TYPE_IOPORT) + return (VM_MEMATTR_DEVICE); + else if ((p->md_attr & EFI_MD_ATTR_WB) != 0 || + p->md_type == EFI_MD_TYPE_RECLAIM) + return (VM_MEMATTR_WRITE_BACK); + else if ((p->md_attr & EFI_MD_ATTR_WT) != 0) + return (VM_MEMATTR_WRITE_THROUGH); + else if ((p->md_attr & EFI_MD_ATTR_WC) != 0) + return (VM_MEMATTR_WRITE_COMBINING); + break; + } + + return (VM_MEMATTR_DEVICE); +} + +void +initarm(struct arm64_bootparams *abp) +{ + struct efi_fb *efifb; + struct pcpu *pcpup; + char *env; +#ifdef FDT + struct mem_region mem_regions[FDT_MEM_REGIONS]; + int mem_regions_sz; +#endif + vm_offset_t lastaddr; + caddr_t kmdp; + bool valid; + + boot_el = abp->boot_el; + + /* Parse loader or FDT boot parametes. Determine last used address. */ + lastaddr = parse_boot_param(abp); + + /* Find the kernel address */ + kmdp = preload_search_by_type("elf kernel"); + if (kmdp == NULL) + kmdp = preload_search_by_type("elf64 kernel"); + + identify_cpu(0); + update_special_regs(0); + + link_elf_ireloc(kmdp); + try_load_dtb(kmdp); + + efi_systbl_phys = MD_FETCH(kmdp, MODINFOMD_FW_HANDLE, vm_paddr_t); + + /* Load the physical memory ranges */ + efihdr = (struct efi_map_header *)preload_search_info(kmdp, + MODINFO_METADATA | MODINFOMD_EFI_MAP); + if (efihdr != NULL) + add_efi_map_entries(efihdr); +#ifdef FDT + else { + /* Grab physical memory regions information from device tree. */ + if (fdt_get_mem_regions(mem_regions, &mem_regions_sz, + NULL) != 0) + panic("Cannot get physical memory regions"); + physmem_hardware_regions(mem_regions, mem_regions_sz); + } + if (fdt_get_reserved_mem(mem_regions, &mem_regions_sz) == 0) + physmem_exclude_regions(mem_regions, mem_regions_sz, + EXFLAG_NODUMP | EXFLAG_NOALLOC); +#endif + + /* Exclude the EFI framebuffer from our view of physical memory. */ + efifb = (struct efi_fb *)preload_search_info(kmdp, + MODINFO_METADATA | MODINFOMD_EFI_FB); + if (efifb != NULL) + physmem_exclude_region(efifb->fb_addr, efifb->fb_size, + EXFLAG_NOALLOC); + + /* Set the pcpu data, this is needed by pmap_bootstrap */ + pcpup = &__pcpu[0]; + pcpu_init(pcpup, 0, sizeof(struct pcpu)); + + /* + * Set the pcpu pointer with a backup in tpidr_el1 to be + * loaded when entering the kernel from userland. + */ + __asm __volatile( + "mov x18, %0 \n" + "msr tpidr_el1, %0" :: "r"(pcpup)); + + PCPU_SET(curthread, &thread0); + PCPU_SET(midr, get_midr()); + + /* Do basic tuning, hz etc */ + init_param1(); + + cache_setup(); + pan_setup(); + + /* Bootstrap enough of pmap to enter the kernel proper */ + pmap_bootstrap(abp->kern_l0pt, abp->kern_l1pt, + KERNBASE - abp->kern_delta, lastaddr - KERNBASE); + /* Exclude entries neexed in teh DMAP region, but not phys_avail */ + if (efihdr != NULL) + exclude_efi_map_entries(efihdr); + physmem_init_kernel_globals(); + + devmap_bootstrap(0, NULL); + + valid = bus_probe(); + + cninit(); + + if (!valid) + panic("Invalid bus configuration: %s", + kern_getenv("kern.cfg.order")); + + init_proc0(abp->kern_stack); + msgbufinit(msgbufp, msgbufsize); + mutex_init(); + init_param2(physmem); + + dbg_init(); + kdb_init(); + pan_enable(); + + kcsan_cpu_init(0); + + env = kern_getenv("kernelname"); + if (env != NULL) + strlcpy(kernelname, env, sizeof(kernelname)); + + if (boothowto & RB_VERBOSE) { + print_efi_map_entries(efihdr); + physmem_print_tables(); + } + + early_boot = 0; +} + +void +dbg_init(void) +{ + + /* Clear OS lock */ + WRITE_SPECIALREG(oslar_el1, 0); + + /* This permits DDB to use debug registers for watchpoints. */ + dbg_monitor_init(); + + /* TODO: Eventually will need to initialize debug registers here. */ +} + +#ifdef DDB +#include <ddb/ddb.h> + +DB_SHOW_COMMAND(specialregs, db_show_spregs) +{ +#define PRINT_REG(reg) \ + db_printf(__STRING(reg) " = %#016lx\n", READ_SPECIALREG(reg)) + + PRINT_REG(actlr_el1); + PRINT_REG(afsr0_el1); + PRINT_REG(afsr1_el1); + PRINT_REG(aidr_el1); + PRINT_REG(amair_el1); + PRINT_REG(ccsidr_el1); + PRINT_REG(clidr_el1); + PRINT_REG(contextidr_el1); + PRINT_REG(cpacr_el1); + PRINT_REG(csselr_el1); + PRINT_REG(ctr_el0); + PRINT_REG(currentel); + PRINT_REG(daif); + PRINT_REG(dczid_el0); + PRINT_REG(elr_el1); + PRINT_REG(esr_el1); + PRINT_REG(far_el1); +#if 0 + /* ARM64TODO: Enable VFP before reading floating-point registers */ + PRINT_REG(fpcr); + PRINT_REG(fpsr); +#endif + PRINT_REG(id_aa64afr0_el1); + PRINT_REG(id_aa64afr1_el1); + PRINT_REG(id_aa64dfr0_el1); + PRINT_REG(id_aa64dfr1_el1); + PRINT_REG(id_aa64isar0_el1); + PRINT_REG(id_aa64isar1_el1); + PRINT_REG(id_aa64pfr0_el1); + PRINT_REG(id_aa64pfr1_el1); + PRINT_REG(id_afr0_el1); + PRINT_REG(id_dfr0_el1); + PRINT_REG(id_isar0_el1); + PRINT_REG(id_isar1_el1); + PRINT_REG(id_isar2_el1); + PRINT_REG(id_isar3_el1); + PRINT_REG(id_isar4_el1); + PRINT_REG(id_isar5_el1); + PRINT_REG(id_mmfr0_el1); + PRINT_REG(id_mmfr1_el1); + PRINT_REG(id_mmfr2_el1); + PRINT_REG(id_mmfr3_el1); +#if 0 + /* Missing from llvm */ + PRINT_REG(id_mmfr4_el1); +#endif + PRINT_REG(id_pfr0_el1); + PRINT_REG(id_pfr1_el1); + PRINT_REG(isr_el1); + PRINT_REG(mair_el1); + PRINT_REG(midr_el1); + PRINT_REG(mpidr_el1); + PRINT_REG(mvfr0_el1); + PRINT_REG(mvfr1_el1); + PRINT_REG(mvfr2_el1); + PRINT_REG(revidr_el1); + PRINT_REG(sctlr_el1); + PRINT_REG(sp_el0); + PRINT_REG(spsel); + PRINT_REG(spsr_el1); + PRINT_REG(tcr_el1); + PRINT_REG(tpidr_el0); + PRINT_REG(tpidr_el1); + PRINT_REG(tpidrro_el0); + PRINT_REG(ttbr0_el1); + PRINT_REG(ttbr1_el1); + PRINT_REG(vbar_el1); +#undef PRINT_REG +} + +DB_SHOW_COMMAND(vtop, db_show_vtop) +{ + uint64_t phys; + + if (have_addr) { + phys = arm64_address_translate_s1e1r(addr); + db_printf("EL1 physical address reg (read): 0x%016lx\n", phys); + phys = arm64_address_translate_s1e1w(addr); + db_printf("EL1 physical address reg (write): 0x%016lx\n", phys); + phys = arm64_address_translate_s1e0r(addr); + db_printf("EL0 physical address reg (read): 0x%016lx\n", phys); + phys = arm64_address_translate_s1e0w(addr); + db_printf("EL0 physical address reg (write): 0x%016lx\n", phys); + } else + db_printf("show vtop <virt_addr>\n"); +} +#endif |