/* $NetBSD: arm32_machdep.c,v 1.44 2004/03/24 15:34:47 atatat Exp $ */
/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* Copyright (c) 2004 Olivier Houchard
* Copyright (c) 1994-1998 Mark Brinicombe.
* Copyright (c) 1994 Brini.
* All rights reserved.
*
* This code is derived from software written for Brini by Mark Brinicombe
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Mark Brinicombe
* for the NetBSD Project.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
*
* Machine dependent functions for kernel setup
*
* Created : 17/09/94
* Updated : 18/04/01 updated for new wscons
*/
#include "opt_ddb.h"
#include "opt_kstack_pages.h"
#include "opt_platform.h"
#include "opt_sched.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/bus.h>
#include <sys/cons.h>
#include <sys/cpu.h>
#include <sys/devmap.h>
#include <sys/efi.h>
#include <sys/imgact.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/linker.h>
#include <sys/msgbuf.h>
#include <sys/physmem.h>
#include <sys/reboot.h>
#include <sys/rwlock.h>
#include <sys/sched.h>
#include <sys/syscallsubr.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
#include <sys/vmmeter.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <machine/asm.h>
#include <machine/debug_monitor.h>
#include <machine/machdep.h>
#include <machine/metadata.h>
#include <machine/pcb.h>
#include <machine/platform.h>
#include <machine/sysarch.h>
#include <machine/undefined.h>
#include <machine/vfp.h>
#include <machine/vmparam.h>
#ifdef FDT
#include <dev/fdt/fdt_common.h>
#include <machine/ofw_machdep.h>
#endif
#ifdef DEBUG
#define debugf(fmt, args...) printf(fmt, ##args)
#else
#define debugf(fmt, args...)
#endif
#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7) || \
defined(COMPAT_FREEBSD9)
#error FreeBSD/arm doesn't provide compatibility with releases prior to 10
#endif
#if __ARM_ARCH < 6
#error FreeBSD requires ARMv6 or later
#endif
struct pcpu __pcpu[MAXCPU];
struct pcpu *pcpup = &__pcpu[0];
static struct trapframe proc0_tf;
uint32_t cpu_reset_address = 0;
int cold = 1;
vm_offset_t vector_page;
/* The address at which the kernel was loaded. Set early in initarm(). */
vm_paddr_t arm_physmem_kernaddr;
int (*_arm_memcpy)(void *, void *, int, int) = NULL;
int (*_arm_bzero)(void *, int, int) = NULL;
int _min_memcpy_size = 0;
int _min_bzero_size = 0;
extern int *end;
#ifdef FDT
vm_paddr_t pmap_pa;
vm_offset_t systempage;
vm_offset_t irqstack;
vm_offset_t undstack;
vm_offset_t abtstack;
#endif /* FDT */
#ifdef PLATFORM
static delay_func *delay_impl;
static void *delay_arg;
#endif
struct kva_md_info kmi;
/*
* arm32_vector_init:
*
* Initialize the vector page, and select whether or not to
* relocate the vectors.
*
* NOTE: We expect the vector page to be mapped at its expected
* destination.
*/
extern unsigned int page0[], page0_data[];
void
arm_vector_init(vm_offset_t va, int which)
{
unsigned int *vectors = (int *) va;
unsigned int *vectors_data = vectors + (page0_data - page0);
int vec;
/*
* Loop through the vectors we're taking over, and copy the
* vector's insn and data word.
*/
for (vec = 0; vec < ARM_NVEC; vec++) {
if ((which & (1 << vec)) == 0) {
/* Don't want to take over this vector. */
continue;
}
vectors[vec] = page0[vec];
vectors_data[vec] = page0_data[vec];
}
/* Now sync the vectors. */
icache_sync(va, (ARM_NVEC * 2) * sizeof(u_int));
vector_page = va;
}
static void
cpu_startup(void *dummy)
{
struct pcb *pcb = thread0.td_pcb;
const unsigned int mbyte = 1024 * 1024;
identify_arm_cpu();
vm_ksubmap_init(&kmi);
/*
* Display the RAM layout.
*/
printf("real memory = %ju (%ju MB)\n",
(uintmax_t)arm32_ptob(realmem),
(uintmax_t)arm32_ptob(realmem) / mbyte);
printf("avail memory = %ju (%ju MB)\n",
(uintmax_t)arm32_ptob(vm_free_count()),
(uintmax_t)arm32_ptob(vm_free_count()) / mbyte);
if (bootverbose) {
physmem_print_tables();
devmap_print_table();
}
bufinit();
vm_pager_bufferinit();
pcb->pcb_regs.sf_sp = (u_int)thread0.td_kstack +
USPACE_SVC_STACK_TOP;
pmap_set_pcb_pagedir(kernel_pmap, pcb);
}
SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
/*
* 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)
{
dcache_wb_poc((vm_offset_t)ptr, (vm_paddr_t)vtophys(ptr), len);
}
/* 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_idle(int busy)
{
CTR2(KTR_SPARE2, "cpu_idle(%d) at %d", busy, curcpu);
spinlock_enter();
if (!busy)
cpu_idleclock();
if (!sched_runnable())
cpu_sleep(0);
if (!busy)
cpu_activeclock();
spinlock_exit();
CTR2(KTR_SPARE2, "cpu_idle(%d) at %d done", busy, curcpu);
}
int
cpu_idle_wakeup(int cpu)
{
return (0);
}
void
cpu_initclocks(void)
{
#ifdef SMP
if (PCPU_GET(cpuid) == 0)
cpu_initclocks_bsp();
else
cpu_initclocks_ap();
#else
cpu_initclocks_bsp();
#endif
}
#ifdef PLATFORM
void
arm_set_delay(delay_func *impl, void *arg)
{
KASSERT(impl != NULL, ("No DELAY implementation"));
delay_impl = impl;
delay_arg = arg;
}
void
DELAY(int usec)
{
TSENTER();
delay_impl(usec, delay_arg);
TSEXIT();
}
#endif
void
cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
{
pcpu->pc_mpidr = 0xffffffff;
}
void
spinlock_enter(void)
{
struct thread *td;
register_t cspr;
td = curthread;
if (td->td_md.md_spinlock_count == 0) {
cspr = disable_interrupts(PSR_I | PSR_F);
td->td_md.md_spinlock_count = 1;
td->td_md.md_saved_cspr = cspr;
critical_enter();
} else
td->td_md.md_spinlock_count++;
}
void
spinlock_exit(void)
{
struct thread *td;
register_t cspr;
td = curthread;
cspr = td->td_md.md_saved_cspr;
td->td_md.md_spinlock_count--;
if (td->td_md.md_spinlock_count == 0) {
critical_exit();
restore_interrupts(cspr);
}
}
/*
* Clear registers on exec
*/
void
exec_setregs(struct thread *td, struct image_params *imgp, uintptr_t stack)
{
struct trapframe *tf = td->td_frame;
memset(tf, 0, sizeof(*tf));
tf->tf_usr_sp = stack;
tf->tf_usr_lr = imgp->entry_addr;
tf->tf_svc_lr = 0x77777777;
tf->tf_pc = imgp->entry_addr;
tf->tf_spsr = PSR_USR32_MODE;
}
#ifdef VFP
/*
* Get machine VFP context.
*/
void
get_vfpcontext(struct thread *td, mcontext_vfp_t *vfp)
{
struct pcb *pcb;
pcb = td->td_pcb;
if (td == curthread) {
critical_enter();
vfp_store(&pcb->pcb_vfpstate, false);
critical_exit();
} else
MPASS(TD_IS_SUSPENDED(td));
memcpy(vfp->mcv_reg, pcb->pcb_vfpstate.reg,
sizeof(vfp->mcv_reg));
vfp->mcv_fpscr = pcb->pcb_vfpstate.fpscr;
}
/*
* Set machine VFP context.
*/
void
set_vfpcontext(struct thread *td, mcontext_vfp_t *vfp)
{
struct pcb *pcb;
pcb = td->td_pcb;
if (td == curthread) {
critical_enter();
vfp_discard(td);
critical_exit();
} else
MPASS(TD_IS_SUSPENDED(td));
memcpy(pcb->pcb_vfpstate.reg, vfp->mcv_reg,
sizeof(pcb->pcb_vfpstate.reg));
pcb->pcb_vfpstate.fpscr = vfp->mcv_fpscr;
}
#endif
int
arm_get_vfpstate(struct thread *td, void *args)
{
int rv;
struct arm_get_vfpstate_args ua;
mcontext_vfp_t mcontext_vfp;
rv = copyin(args, &ua, sizeof(ua));
if (rv != 0)
return (rv);
if (ua.mc_vfp_size != sizeof(mcontext_vfp_t))
return (EINVAL);
#ifdef VFP
get_vfpcontext(td, &mcontext_vfp);
#else
bzero(&mcontext_vfp, sizeof(mcontext_vfp));
#endif
rv = copyout(&mcontext_vfp, ua.mc_vfp, sizeof(mcontext_vfp));
if (rv != 0)
return (rv);
return (0);
}
/*
* Get machine context.
*/
int
get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
{
struct trapframe *tf = td->td_frame;
__greg_t *gr = mcp->__gregs;
if (clear_ret & GET_MC_CLEAR_RET) {
gr[_REG_R0] = 0;
gr[_REG_CPSR] = tf->tf_spsr & ~PSR_C;
} else {
gr[_REG_R0] = tf->tf_r0;
gr[_REG_CPSR] = tf->tf_spsr;
}
gr[_REG_R1] = tf->tf_r1;
gr[_REG_R2] = tf->tf_r2;
gr[_REG_R3] = tf->tf_r3;
gr[_REG_R4] = tf->tf_r4;
gr[_REG_R5] = tf->tf_r5;
gr[_REG_R6] = tf->tf_r6;
gr[_REG_R7] = tf->tf_r7;
gr[_REG_R8] = tf->tf_r8;
gr[_REG_R9] = tf->tf_r9;
gr[_REG_R10] = tf->tf_r10;
gr[_REG_R11] = tf->tf_r11;
gr[_REG_R12] = tf->tf_r12;
gr[_REG_SP] = tf->tf_usr_sp;
gr[_REG_LR] = tf->tf_usr_lr;
gr[_REG_PC] = tf->tf_pc;
mcp->mc_vfp_size = 0;
mcp->mc_vfp_ptr = NULL;
memset(&mcp->mc_spare, 0, sizeof(mcp->mc_spare));
return (0);
}
/*
* Set machine context.
*
* However, we don't set any but the user modifiable flags, and we won't
* touch the cs selector.
*/
int
set_mcontext(struct thread *td, mcontext_t *mcp)
{
mcontext_vfp_t mc_vfp, *vfp;
struct trapframe *tf = td->td_frame;
const __greg_t *gr = mcp->__gregs;
int spsr;
/*
* Make sure the processor mode has not been tampered with and
* interrupts have not been disabled.
*/
spsr = gr[_REG_CPSR];
if ((spsr & PSR_MODE) != PSR_USR32_MODE ||
(spsr & (PSR_I | PSR_F)) != 0)
return (EINVAL);
#ifdef WITNESS
if (mcp->mc_vfp_size != 0 && mcp->mc_vfp_size != sizeof(mc_vfp)) {
printf("%s: %s: Malformed mc_vfp_size: %d (0x%08X)\n",
td->td_proc->p_comm, __func__,
mcp->mc_vfp_size, mcp->mc_vfp_size);
} else if (mcp->mc_vfp_size != 0 && mcp->mc_vfp_ptr == NULL) {
printf("%s: %s: c_vfp_size != 0 but mc_vfp_ptr == NULL\n",
td->td_proc->p_comm, __func__);
}
#endif
if (mcp->mc_vfp_size == sizeof(mc_vfp) && mcp->mc_vfp_ptr != NULL) {
if (copyin(mcp->mc_vfp_ptr, &mc_vfp, sizeof(mc_vfp)) != 0)
return (EFAULT);
vfp = &mc_vfp;
} else {
vfp = NULL;
}
tf->tf_r0 = gr[_REG_R0];
tf->tf_r1 = gr[_REG_R1];
tf->tf_r2 = gr[_REG_R2];
tf->tf_r3 = gr[_REG_R3];
tf->tf_r4 = gr[_REG_R4];
tf->tf_r5 = gr[_REG_R5];
tf->tf_r6 = gr[_REG_R6];
tf->tf_r7 = gr[_REG_R7];
tf->tf_r8 = gr[_REG_R8];
tf->tf_r9 = gr[_REG_R9];
tf->tf_r10 = gr[_REG_R10];
tf->tf_r11 = gr[_REG_R11];
tf->tf_r12 = gr[_REG_R12];
tf->tf_usr_sp = gr[_REG_SP];
tf->tf_usr_lr = gr[_REG_LR];
tf->tf_pc = gr[_REG_PC];
tf->tf_spsr = gr[_REG_CPSR];
#ifdef VFP
if (vfp != NULL)
set_vfpcontext(td, vfp);
#endif
return (0);
}
void
sendsig(catcher, ksi, mask)
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;
int sig;
int code;
td = curthread;
p = td->td_proc;
PROC_LOCK_ASSERT(p, MA_OWNED);
sig = ksi->ksi_signo;
code = ksi->ksi_code;
psp = p->p_sigacts;
mtx_assert(&psp->ps_mtx, MA_OWNED);
tf = td->td_frame;
onstack = sigonstack(tf->tf_usr_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_usr_sp;
/* make room on the stack */
fp--;
/* make the stack aligned */
fp = (struct sigframe *)STACKALIGN(fp);
/* Populate the siginfo frame. */
bzero(&frame, sizeof(frame));
get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
#ifdef VFP
get_vfpcontext(td, &frame.sf_vfp);
frame.sf_uc.uc_mcontext.mc_vfp_size = sizeof(fp->sf_vfp);
frame.sf_uc.uc_mcontext.mc_vfp_ptr = &fp->sf_vfp;
#else
frame.sf_uc.uc_mcontext.mc_vfp_size = 0;
frame.sf_uc.uc_mcontext.mc_vfp_ptr = NULL;
#endif
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);
}
/*
* Build context to run handler in. We invoke the handler
* directly, only returning via the trampoline. Note the
* trampoline version numbers are coordinated with machine-
* dependent code in libc.
*/
tf->tf_r0 = sig;
tf->tf_r1 = (register_t)&fp->sf_si;
tf->tf_r2 = (register_t)&fp->sf_uc;
/* the trampoline uses r5 as the uc address */
tf->tf_r5 = (register_t)&fp->sf_uc;
tf->tf_pc = (register_t)catcher;
tf->tf_usr_sp = (register_t)fp;
sysent = p->p_sysent;
if (sysent->sv_sigcode_base != 0)
tf->tf_usr_lr = (register_t)sysent->sv_sigcode_base;
else
tf->tf_usr_lr = (register_t)(sysent->sv_psstrings -
*(sysent->sv_szsigcode));
/* Set the mode to enter in the signal handler */
#if __ARM_ARCH >= 7
if ((register_t)catcher & 1)
tf->tf_spsr |= PSR_T;
else
tf->tf_spsr &= ~PSR_T;
#endif
CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_usr_lr,
tf->tf_usr_sp);
PROC_LOCK(p);
mtx_lock(&psp->ps_mtx);
}
int
sys_sigreturn(td, uap)
struct thread *td;
struct sigreturn_args /* {
const struct __ucontext *sigcntxp;
} */ *uap;
{
ucontext_t uc;
int error;
if (uap == NULL)
return (EFAULT);
if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
return (EFAULT);
/* Restore register context. */
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)
{
pcb->pcb_regs.sf_r4 = tf->tf_r4;
pcb->pcb_regs.sf_r5 = tf->tf_r5;
pcb->pcb_regs.sf_r6 = tf->tf_r6;
pcb->pcb_regs.sf_r7 = tf->tf_r7;
pcb->pcb_regs.sf_r8 = tf->tf_r8;
pcb->pcb_regs.sf_r9 = tf->tf_r9;
pcb->pcb_regs.sf_r10 = tf->tf_r10;
pcb->pcb_regs.sf_r11 = tf->tf_r11;
pcb->pcb_regs.sf_r12 = tf->tf_r12;
pcb->pcb_regs.sf_pc = tf->tf_pc;
pcb->pcb_regs.sf_lr = tf->tf_usr_lr;
pcb->pcb_regs.sf_sp = tf->tf_usr_sp;
}
void
pcpu0_init(void)
{
set_curthread(&thread0);
pcpu_init(pcpup, 0, sizeof(struct pcpu));
pcpup->pc_mpidr = cp15_mpidr_get() & 0xFFFFFF;
PCPU_SET(curthread, &thread0);
}
/*
* Initialize proc0
*/
void
init_proc0(vm_offset_t kstack)
{
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_flags = 0;
thread0.td_pcb->pcb_vfpcpu = -1;
thread0.td_pcb->pcb_vfpstate.fpscr = VFPSCR_DN;
thread0.td_frame = &proc0_tf;
pcpup->pc_curpcb = thread0.td_pcb;
}
void
set_stackptrs(int cpu)
{
set_stackptr(PSR_IRQ32_MODE,
irqstack + ((IRQ_STACK_SIZE * PAGE_SIZE) * (cpu + 1)));
set_stackptr(PSR_ABT32_MODE,
abtstack + ((ABT_STACK_SIZE * PAGE_SIZE) * (cpu + 1)));
set_stackptr(PSR_UND32_MODE,
undstack + ((UND_STACK_SIZE * PAGE_SIZE) * (cpu + 1)));
}
static void
arm_kdb_init(void)
{
kdb_init();
#ifdef KDB
if (boothowto & RB_KDB)
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
#endif
}
#ifdef FDT
void *
initarm(struct arm_boot_params *abp)
{
struct mem_region mem_regions[FDT_MEM_REGIONS];
vm_paddr_t lastaddr;
vm_offset_t dtbp, kernelstack, dpcpu;
char *env;
void *kmdp;
int err_devmap, mem_regions_sz;
phandle_t root;
char dts_version[255];
#ifdef EFI
struct efi_map_header *efihdr;
#endif
/* get last allocated physical address */
arm_physmem_kernaddr = abp->abp_physaddr;
lastaddr = parse_boot_param(abp) - KERNVIRTADDR + arm_physmem_kernaddr;
set_cpufuncs();
cpuinfo_init();
/*
* Find the dtb passed in by the boot loader.
*/
kmdp = preload_search_by_type("elf kernel");
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 == (vm_offset_t)NULL)
dtbp = (vm_offset_t)&fdt_static_dtb;
#endif
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");
#if defined(LINUX_BOOT_ABI)
arm_parse_fdt_bootargs();
#endif
#ifdef EFI
efihdr = (struct efi_map_header *)preload_search_info(kmdp,
MODINFO_METADATA | MODINFOMD_EFI_MAP);
if (efihdr != NULL) {
arm_add_efi_map_entries(efihdr, mem_regions, &mem_regions_sz);
} else
#endif
{
/* 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);
/* Grab reserved memory regions information from device tree. */
if (fdt_get_reserved_regions(mem_regions, &mem_regions_sz) == 0)
physmem_exclude_regions(mem_regions, mem_regions_sz,
EXFLAG_NODUMP | EXFLAG_NOALLOC);
/*
* Set TEX remapping registers.
* Setup kernel page tables and switch to kernel L1 page table.
*/
pmap_set_tex();
pmap_bootstrap_prepare(lastaddr);
/*
* If EARLY_PRINTF support is enabled, we need to re-establish the
* mapping after pmap_bootstrap_prepare() switches to new page tables.
* Note that we can only do the remapping if the VA is outside the
* kernel, now that we have real virtual (not VA=PA) mappings in effect.
* Early printf does not work between the time pmap_set_tex() does
* cp15_prrr_set() and this code remaps the VA.
*/
#if defined(EARLY_PRINTF) && defined(SOCDEV_PA) && defined(SOCDEV_VA) && SOCDEV_VA < KERNBASE
pmap_preboot_map_attr(SOCDEV_PA, SOCDEV_VA, 1024 * 1024,
VM_PROT_READ | VM_PROT_WRITE, VM_MEMATTR_DEVICE);
#endif
/*
* Now that proper page tables are installed, call cpu_setup() to enable
* instruction and data caches and other chip-specific features.
*/
cpu_setup();
/* Platform-specific initialisation */
platform_probe_and_attach();
pcpu0_init();
/* Do basic tuning, hz etc */
init_param1();
/*
* Allocate a page for the system page mapped to 0xffff0000
* This page will just contain the system vectors and can be
* shared by all processes.
*/
systempage = pmap_preboot_get_pages(1);
/* Map the vector page. */
pmap_preboot_map_pages(systempage, ARM_VECTORS_HIGH, 1);
if (virtual_end >= ARM_VECTORS_HIGH)
virtual_end = ARM_VECTORS_HIGH - 1;
/* Allocate dynamic per-cpu area. */
dpcpu = pmap_preboot_get_vpages(DPCPU_SIZE / PAGE_SIZE);
dpcpu_init((void *)dpcpu, 0);
/* Allocate stacks for all modes */
irqstack = pmap_preboot_get_vpages(IRQ_STACK_SIZE * MAXCPU);
abtstack = pmap_preboot_get_vpages(ABT_STACK_SIZE * MAXCPU);
undstack = pmap_preboot_get_vpages(UND_STACK_SIZE * MAXCPU );
kernelstack = pmap_preboot_get_vpages(kstack_pages);
/* Allocate message buffer. */
msgbufp = (void *)pmap_preboot_get_vpages(
round_page(msgbufsize) / PAGE_SIZE);
/*
* Pages were allocated during the secondary bootstrap for the
* stacks for different CPU modes.
* We must now set the r13 registers in the different CPU modes to
* point to these stacks.
* Since the ARM stacks use STMFD etc. we must set r13 to the top end
* of the stack memory.
*/
set_stackptrs(0);
mutex_init();
/* Establish static device mappings. */
err_devmap = platform_devmap_init();
devmap_bootstrap(0, NULL);
vm_max_kernel_address = platform_lastaddr();
/*
* Only after the SOC registers block is mapped we can perform device
* tree fixups, as they may attempt to read parameters from hardware.
*/
OF_interpret("perform-fixup", 0);
platform_gpio_init();
cninit();
/*
* If we made a mapping for EARLY_PRINTF after pmap_bootstrap_prepare(),
* undo it now that the normal console printf works.
*/
#if defined(EARLY_PRINTF) && defined(SOCDEV_PA) && defined(SOCDEV_VA) && SOCDEV_VA < KERNBASE
pmap_kremove(SOCDEV_VA);
#endif
debugf("initarm: console initialized\n");
debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp);
debugf(" boothowto = 0x%08x\n", boothowto);
debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp);
debugf(" lastaddr1: 0x%08x\n", lastaddr);
arm_print_kenv();
env = kern_getenv("kernelname");
if (env != NULL)
strlcpy(kernelname, env, sizeof(kernelname));
if (err_devmap != 0)
printf("WARNING: could not fully configure devmap, error=%d\n",
err_devmap);
platform_late_init();
root = OF_finddevice("/");
if (OF_getprop(root, "freebsd,dts-version", dts_version, sizeof(dts_version)) > 0) {
if (strcmp(LINUX_DTS_VERSION, dts_version) != 0)
printf("WARNING: DTB version is %s while kernel expects %s, "
"please update the DTB in the ESP\n",
dts_version,
LINUX_DTS_VERSION);
} else {
printf("WARNING: Cannot find freebsd,dts-version property, "
"cannot check DTB compliance\n");
}
/*
* We must now clean the cache again....
* Cleaning may be done by reading new data to displace any
* dirty data in the cache. This will have happened in cpu_setttb()
* but since we are boot strapping the addresses used for the read
* may have just been remapped and thus the cache could be out
* of sync. A re-clean after the switch will cure this.
* After booting there are no gross relocations of the kernel thus
* this problem will not occur after initarm().
*/
/* Set stack for exception handlers */
undefined_init();
init_proc0(kernelstack);
arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
enable_interrupts(PSR_A);
pmap_bootstrap(0);
/* Exclude the kernel (and all the things we allocated which immediately
* follow the kernel) from the VM allocation pool but not from crash
* dumps. virtual_avail is a global variable which tracks the kva we've
* "allocated" while setting up pmaps.
*
* Prepare the list of physical memory available to the vm subsystem.
*/
physmem_exclude_region(abp->abp_physaddr,
pmap_preboot_get_pages(0) - abp->abp_physaddr, EXFLAG_NOALLOC);
physmem_init_kernel_globals();
init_param2(physmem);
/* Init message buffer. */
msgbufinit(msgbufp, msgbufsize);
dbg_monitor_init();
arm_kdb_init();
/* Apply possible BP hardening. */
cpuinfo_init_bp_hardening();
return ((void *)STACKALIGN(thread0.td_pcb));
}
#endif /* FDT */