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/*-
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*/
/*-
* Copyright (C) 2001 Benno Rice
* 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 Benno Rice ``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 TOOLS GMBH 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.
* $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/powerpc/aim/machdep.c 234703 2012-04-26 13:55:15Z nwhitehorn $");
#include "opt_compat.h"
#include "opt_ddb.h"
#include "opt_kstack_pages.h"
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/bus.h>
#include <sys/cons.h>
#include <sys/cpu.h>
#include <sys/eventhandler.h>
#include <sys/exec.h>
#include <sys/imgact.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/linker.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/msgbuf.h>
#include <sys/mutex.h>
#include <sys/ptrace.h>
#include <sys/reboot.h>
#include <sys/signalvar.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
#include <sys/ucontext.h>
#include <sys/uio.h>
#include <sys/vmmeter.h>
#include <sys/vnode.h>
#include <net/netisr.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_pager.h>
#include <machine/altivec.h>
#ifndef __powerpc64__
#include <machine/bat.h>
#endif
#include <machine/cpu.h>
#include <machine/elf.h>
#include <machine/fpu.h>
#include <machine/hid.h>
#include <machine/kdb.h>
#include <machine/md_var.h>
#include <machine/metadata.h>
#include <machine/mmuvar.h>
#include <machine/pcb.h>
#include <machine/reg.h>
#include <machine/sigframe.h>
#include <machine/spr.h>
#include <machine/trap.h>
#include <machine/vmparam.h>
#include <ddb/ddb.h>
#include <dev/ofw/openfirm.h>
#ifdef DDB
extern vm_offset_t ksym_start, ksym_end;
#endif
int cold = 1;
#ifdef __powerpc64__
extern int n_slbs;
int cacheline_size = 128;
#else
int cacheline_size = 32;
#endif
int hw_direct_map = 1;
struct pcpu __pcpu[MAXCPU];
static struct trapframe frame0;
char machine[] = "powerpc";
SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
static void cpu_startup(void *);
SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size,
CTLFLAG_RD, &cacheline_size, 0, "");
uintptr_t powerpc_init(vm_offset_t, vm_offset_t, vm_offset_t, void *);
int setfault(faultbuf); /* defined in locore.S */
long Maxmem = 0;
long realmem = 0;
#ifndef __powerpc64__
struct bat battable[16];
#endif
struct kva_md_info kmi;
static void
cpu_startup(void *dummy)
{
/*
* Initialise the decrementer-based clock.
*/
decr_init();
/*
* Good {morning,afternoon,evening,night}.
*/
cpu_setup(PCPU_GET(cpuid));
#ifdef PERFMON
perfmon_init();
#endif
printf("real memory = %ld (%ld MB)\n", ptoa(physmem),
ptoa(physmem) / 1048576);
realmem = physmem;
if (bootverbose)
printf("available KVA = %zd (%zd MB)\n",
virtual_end - virtual_avail,
(virtual_end - virtual_avail) / 1048576);
/*
* Display any holes after the first chunk of extended memory.
*/
if (bootverbose) {
int indx;
printf("Physical memory chunk(s):\n");
for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
vm_offset_t size1 =
phys_avail[indx + 1] - phys_avail[indx];
#ifdef __powerpc64__
printf("0x%016lx - 0x%016lx, %ld bytes (%ld pages)\n",
#else
printf("0x%08x - 0x%08x, %d bytes (%ld pages)\n",
#endif
phys_avail[indx], phys_avail[indx + 1] - 1, size1,
size1 / PAGE_SIZE);
}
}
vm_ksubmap_init(&kmi);
printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count),
ptoa(cnt.v_free_count) / 1048576);
/*
* Set up buffers, so they can be used to read disk labels.
*/
bufinit();
vm_pager_bufferinit();
}
extern char kernel_text[], _end[];
#ifndef __powerpc64__
/* Bits for running on 64-bit systems in 32-bit mode. */
extern void *testppc64, *testppc64size;
extern void *restorebridge, *restorebridgesize;
extern void *rfid_patch, *rfi_patch1, *rfi_patch2;
extern void *trapcode64;
#endif
#ifdef SMP
extern void *rstcode, *rstsize;
#endif
extern void *trapcode, *trapsize;
extern void *slbtrap, *slbtrapsize;
extern void *alitrap, *alisize;
extern void *dsitrap, *dsisize;
extern void *decrint, *decrsize;
extern void *extint, *extsize;
extern void *dblow, *dbsize;
extern void *imisstrap, *imisssize;
extern void *dlmisstrap, *dlmisssize;
extern void *dsmisstrap, *dsmisssize;
uintptr_t
powerpc_init(vm_offset_t startkernel, vm_offset_t endkernel,
vm_offset_t basekernel, void *mdp)
{
struct pcpu *pc;
void *generictrap;
size_t trap_offset;
void *kmdp;
char *env;
register_t msr, scratch;
uint8_t *cache_check;
int cacheline_warn;
#ifndef __powerpc64__
int ppc64;
#endif
kmdp = NULL;
trap_offset = 0;
cacheline_warn = 0;
/*
* Parse metadata if present and fetch parameters. Must be done
* before console is inited so cninit gets the right value of
* boothowto.
*/
if (mdp != NULL) {
preload_metadata = mdp;
kmdp = preload_search_by_type("elf kernel");
if (kmdp != NULL) {
boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
endkernel = ulmax(endkernel, MD_FETCH(kmdp,
MODINFOMD_KERNEND, vm_offset_t));
#ifdef DDB
ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
#endif
}
}
/*
* Init params/tunables that can be overridden by the loader
*/
init_param1();
/*
* Start initializing proc0 and thread0.
*/
proc_linkup0(&proc0, &thread0);
thread0.td_frame = &frame0;
/*
* Set up per-cpu data.
*/
pc = __pcpu;
pcpu_init(pc, 0, sizeof(struct pcpu));
curthread_reg = pc->pc_curthread = &thread0;
pc->pc_cpuid = 0;
__asm __volatile("mtsprg 0, %0" :: "r"(pc));
/*
* Init mutexes, which we use heavily in PMAP
*/
mutex_init();
/*
* Install the OF client interface
*/
OF_bootstrap();
/*
* Initialize the console before printing anything.
*/
cninit();
/*
* Complain if there is no metadata.
*/
if (mdp == NULL || kmdp == NULL) {
printf("powerpc_init: no loader metadata.\n");
}
/*
* Init KDB
*/
kdb_init();
/* Various very early CPU fix ups */
switch (mfpvr() >> 16) {
/*
* PowerPC 970 CPUs have a misfeature requested by Apple that
* makes them pretend they have a 32-byte cacheline. Turn this
* off before we measure the cacheline size.
*/
case IBM970:
case IBM970FX:
case IBM970MP:
case IBM970GX:
scratch = mfspr(SPR_HID5);
scratch &= ~HID5_970_DCBZ_SIZE_HI;
mtspr(SPR_HID5, scratch);
break;
#ifdef __powerpc64__
case IBMPOWER7:
/* XXX: get from ibm,slb-size in device tree */
n_slbs = 32;
break;
#endif
}
/*
* Initialize the interrupt tables and figure out our cache line
* size and whether or not we need the 64-bit bridge code.
*/
/*
* Disable translation in case the vector area hasn't been
* mapped (G5). Note that no OFW calls can be made until
* translation is re-enabled.
*/
msr = mfmsr();
mtmsr((msr & ~(PSL_IR | PSL_DR)) | PSL_RI);
/*
* Measure the cacheline size using dcbz
*
* Use EXC_PGM as a playground. We are about to overwrite it
* anyway, we know it exists, and we know it is cache-aligned.
*/
cache_check = (void *)EXC_PGM;
for (cacheline_size = 0; cacheline_size < 0x100; cacheline_size++)
cache_check[cacheline_size] = 0xff;
__asm __volatile("dcbz 0,%0":: "r" (cache_check) : "memory");
/* Find the first byte dcbz did not zero to get the cache line size */
for (cacheline_size = 0; cacheline_size < 0x100 &&
cache_check[cacheline_size] == 0; cacheline_size++);
/* Work around psim bug */
if (cacheline_size == 0) {
cacheline_warn = 1;
cacheline_size = 32;
}
/* Make sure the kernel icache is valid before we go too much further */
__syncicache((caddr_t)startkernel, endkernel - startkernel);
#ifndef __powerpc64__
/*
* Figure out whether we need to use the 64 bit PMAP. This works by
* executing an instruction that is only legal on 64-bit PPC (mtmsrd),
* and setting ppc64 = 0 if that causes a trap.
*/
ppc64 = 1;
bcopy(&testppc64, (void *)EXC_PGM, (size_t)&testppc64size);
__syncicache((void *)EXC_PGM, (size_t)&testppc64size);
__asm __volatile("\
mfmsr %0; \
mtsprg2 %1; \
\
mtmsrd %0; \
mfsprg2 %1;"
: "=r"(scratch), "=r"(ppc64));
if (ppc64)
cpu_features |= PPC_FEATURE_64;
/*
* Now copy restorebridge into all the handlers, if necessary,
* and set up the trap tables.
*/
if (cpu_features & PPC_FEATURE_64) {
/* Patch the two instances of rfi -> rfid */
bcopy(&rfid_patch,&rfi_patch1,4);
#ifdef KDB
/* rfi_patch2 is at the end of dbleave */
bcopy(&rfid_patch,&rfi_patch2,4);
#endif
/*
* Copy a code snippet to restore 32-bit bridge mode
* to the top of every non-generic trap handler
*/
trap_offset += (size_t)&restorebridgesize;
bcopy(&restorebridge, (void *)EXC_RST, trap_offset);
bcopy(&restorebridge, (void *)EXC_DSI, trap_offset);
bcopy(&restorebridge, (void *)EXC_ALI, trap_offset);
bcopy(&restorebridge, (void *)EXC_PGM, trap_offset);
bcopy(&restorebridge, (void *)EXC_MCHK, trap_offset);
bcopy(&restorebridge, (void *)EXC_TRC, trap_offset);
bcopy(&restorebridge, (void *)EXC_BPT, trap_offset);
/*
* Set the common trap entry point to the one that
* knows to restore 32-bit operation on execution.
*/
generictrap = &trapcode64;
} else {
generictrap = &trapcode;
}
#else /* powerpc64 */
cpu_features |= PPC_FEATURE_64;
generictrap = &trapcode;
#endif
#ifdef SMP
bcopy(&rstcode, (void *)(EXC_RST + trap_offset), (size_t)&rstsize);
#else
bcopy(generictrap, (void *)EXC_RST, (size_t)&trapsize);
#endif
#ifdef KDB
bcopy(&dblow, (void *)(EXC_MCHK + trap_offset), (size_t)&dbsize);
bcopy(&dblow, (void *)(EXC_PGM + trap_offset), (size_t)&dbsize);
bcopy(&dblow, (void *)(EXC_TRC + trap_offset), (size_t)&dbsize);
bcopy(&dblow, (void *)(EXC_BPT + trap_offset), (size_t)&dbsize);
#else
bcopy(generictrap, (void *)EXC_MCHK, (size_t)&trapsize);
bcopy(generictrap, (void *)EXC_PGM, (size_t)&trapsize);
bcopy(generictrap, (void *)EXC_TRC, (size_t)&trapsize);
bcopy(generictrap, (void *)EXC_BPT, (size_t)&trapsize);
#endif
bcopy(&alitrap, (void *)(EXC_ALI + trap_offset), (size_t)&alisize);
bcopy(&dsitrap, (void *)(EXC_DSI + trap_offset), (size_t)&dsisize);
bcopy(generictrap, (void *)EXC_ISI, (size_t)&trapsize);
#ifdef __powerpc64__
bcopy(&slbtrap, (void *)EXC_DSE, (size_t)&slbtrapsize);
bcopy(&slbtrap, (void *)EXC_ISE, (size_t)&slbtrapsize);
#endif
bcopy(generictrap, (void *)EXC_EXI, (size_t)&trapsize);
bcopy(generictrap, (void *)EXC_FPU, (size_t)&trapsize);
bcopy(generictrap, (void *)EXC_DECR, (size_t)&trapsize);
bcopy(generictrap, (void *)EXC_SC, (size_t)&trapsize);
bcopy(generictrap, (void *)EXC_FPA, (size_t)&trapsize);
bcopy(generictrap, (void *)EXC_VEC, (size_t)&trapsize);
bcopy(generictrap, (void *)EXC_PERF, (size_t)&trapsize);
bcopy(generictrap, (void *)EXC_VECAST_G4, (size_t)&trapsize);
bcopy(generictrap, (void *)EXC_VECAST_G5, (size_t)&trapsize);
#ifndef __powerpc64__
/* G2-specific TLB miss helper handlers */
bcopy(&imisstrap, (void *)EXC_IMISS, (size_t)&imisssize);
bcopy(&dlmisstrap, (void *)EXC_DLMISS, (size_t)&dlmisssize);
bcopy(&dsmisstrap, (void *)EXC_DSMISS, (size_t)&dsmisssize);
#endif
__syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD);
/*
* Restore MSR
*/
mtmsr(msr);
/* Warn if cachline size was not determined */
if (cacheline_warn == 1) {
printf("WARNING: cacheline size undetermined, setting to 32\n");
}
/*
* Choose a platform module so we can get the physical memory map.
*/
platform_probe_and_attach();
/*
* Initialise virtual memory. Use BUS_PROBE_GENERIC priority
* in case the platform module had a better idea of what we
* should do.
*/
if (cpu_features & PPC_FEATURE_64)
pmap_mmu_install(MMU_TYPE_G5, BUS_PROBE_GENERIC);
else
pmap_mmu_install(MMU_TYPE_OEA, BUS_PROBE_GENERIC);
pmap_bootstrap(startkernel, endkernel);
mtmsr(PSL_KERNSET & ~PSL_EE);
/*
* Initialize params/tunables that are derived from memsize
*/
init_param2(physmem);
/*
* Grab booted kernel's name
*/
env = getenv("kernelname");
if (env != NULL) {
strlcpy(kernelname, env, sizeof(kernelname));
freeenv(env);
}
/*
* Finish setting up thread0.
*/
thread0.td_pcb = (struct pcb *)
((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE -
sizeof(struct pcb)) & ~15UL);
bzero((void *)thread0.td_pcb, sizeof(struct pcb));
pc->pc_curpcb = thread0.td_pcb;
/* Initialise the message buffer. */
msgbufinit(msgbufp, msgbufsize);
#ifdef KDB
if (boothowto & RB_KDB)
kdb_enter(KDB_WHY_BOOTFLAGS,
"Boot flags requested debugger");
#endif
return (((uintptr_t)thread0.td_pcb -
(sizeof(struct callframe) - 3*sizeof(register_t))) & ~15UL);
}
void
bzero(void *buf, size_t len)
{
caddr_t p;
p = buf;
while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
*p++ = 0;
len--;
}
while (len >= sizeof(u_long) * 8) {
*(u_long*) p = 0;
*((u_long*) p + 1) = 0;
*((u_long*) p + 2) = 0;
*((u_long*) p + 3) = 0;
len -= sizeof(u_long) * 8;
*((u_long*) p + 4) = 0;
*((u_long*) p + 5) = 0;
*((u_long*) p + 6) = 0;
*((u_long*) p + 7) = 0;
p += sizeof(u_long) * 8;
}
while (len >= sizeof(u_long)) {
*(u_long*) p = 0;
len -= sizeof(u_long);
p += sizeof(u_long);
}
while (len) {
*p++ = 0;
len--;
}
}
void
cpu_boot(int howto)
{
}
/*
* 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)
{
/* TBD */
}
void
cpu_initclocks(void)
{
decr_tc_init();
cpu_initclocks_bsp();
}
/*
* Shutdown the CPU as much as possible.
*/
void
cpu_halt(void)
{
OF_exit();
}
int
ptrace_set_pc(struct thread *td, unsigned long addr)
{
struct trapframe *tf;
tf = td->td_frame;
tf->srr0 = (register_t)addr;
return (0);
}
int
ptrace_single_step(struct thread *td)
{
struct trapframe *tf;
tf = td->td_frame;
tf->srr1 |= PSL_SE;
return (0);
}
int
ptrace_clear_single_step(struct thread *td)
{
struct trapframe *tf;
tf = td->td_frame;
tf->srr1 &= ~PSL_SE;
return (0);
}
void
kdb_cpu_clear_singlestep(void)
{
kdb_frame->srr1 &= ~PSL_SE;
}
void
kdb_cpu_set_singlestep(void)
{
kdb_frame->srr1 |= PSL_SE;
}
/*
* Initialise a struct pcpu.
*/
void
cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
{
#ifdef __powerpc64__
/* Copy the SLB contents from the current CPU */
memcpy(pcpu->pc_slb, PCPU_GET(slb), sizeof(pcpu->pc_slb));
#endif
}
void
spinlock_enter(void)
{
struct thread *td;
register_t msr;
td = curthread;
if (td->td_md.md_spinlock_count == 0) {
msr = intr_disable();
td->td_md.md_spinlock_count = 1;
td->td_md.md_saved_msr = msr;
} else
td->td_md.md_spinlock_count++;
critical_enter();
}
void
spinlock_exit(void)
{
struct thread *td;
register_t msr;
td = curthread;
critical_exit();
msr = td->td_md.md_saved_msr;
td->td_md.md_spinlock_count--;
if (td->td_md.md_spinlock_count == 0)
intr_restore(msr);
}
int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */
int
db_trap_glue(struct trapframe *frame)
{
if (!(frame->srr1 & PSL_PR)
&& (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC
|| (frame->exc == EXC_PGM
&& (frame->srr1 & 0x20000))
|| frame->exc == EXC_BPT
|| frame->exc == EXC_DSI)) {
int type = frame->exc;
if (type == EXC_PGM && (frame->srr1 & 0x20000)) {
type = T_BREAKPOINT;
}
return (kdb_trap(type, 0, frame));
}
return (0);
}
#ifndef __powerpc64__
uint64_t
va_to_vsid(pmap_t pm, vm_offset_t va)
{
return ((pm->pm_sr[(uintptr_t)va >> ADDR_SR_SHFT]) & SR_VSID_MASK);
}
#endif