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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/dtrace/prototype/@/powerpc/booke/machdep.c |
/*-
* Copyright (C) 2006 Semihalf, Marian Balakowicz <m8@semihalf.com>
* 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 ``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 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 $
*/
/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/powerpc/booke/machdep.c 237140 2012-06-15 17:31:15Z kib $");
#include "opt_compat.h"
#include "opt_ddb.h"
#include "opt_kstack_pages.h"
#include "opt_platform.h"
#include <sys/cdefs.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/bus.h>
#include <sys/cons.h>
#include <sys/cpu.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/exec.h>
#include <sys/ktr.h>
#include <sys/syscallsubr.h>
#include <sys/sysproto.h>
#include <sys/signalvar.h>
#include <sys/sysent.h>
#include <sys/imgact.h>
#include <sys/msgbuf.h>
#include <sys/ptrace.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_page.h>
#include <vm/vm_object.h>
#include <vm/vm_pager.h>
#include <machine/cpu.h>
#include <machine/kdb.h>
#include <machine/reg.h>
#include <machine/vmparam.h>
#include <machine/spr.h>
#include <machine/hid.h>
#include <machine/psl.h>
#include <machine/trap.h>
#include <machine/md_var.h>
#include <machine/mmuvar.h>
#include <machine/sigframe.h>
#include <machine/metadata.h>
#include <machine/platform.h>
#include <sys/linker.h>
#include <sys/reboot.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/openfirm.h>
#include <powerpc/mpc85xx/mpc85xx.h>
#ifdef DDB
extern vm_offset_t ksym_start, ksym_end;
#endif
#ifdef DEBUG
#define debugf(fmt, args...) printf(fmt, ##args)
#else
#define debugf(fmt, args...)
#endif
extern unsigned char kernel_text[];
extern unsigned char _etext[];
extern unsigned char _edata[];
extern unsigned char __bss_start[];
extern unsigned char __sbss_start[];
extern unsigned char __sbss_end[];
extern unsigned char _end[];
extern void dcache_enable(void);
extern void dcache_inval(void);
extern void icache_enable(void);
extern void icache_inval(void);
/*
* Bootinfo is passed to us by legacy loaders. Save the address of the
* structure to handle backward compatibility.
*/
uint32_t *bootinfo;
struct kva_md_info kmi;
struct pcpu __pcpu[MAXCPU];
struct trapframe frame0;
int cold = 1;
long realmem = 0;
long Maxmem = 0;
char machine[] = "powerpc";
SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
int cacheline_size = 32;
SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size,
CTLFLAG_RD, &cacheline_size, 0, "");
int hw_direct_map = 0;
static void cpu_e500_startup(void *);
SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_e500_startup, NULL);
void print_kernel_section_addr(void);
void print_kenv(void);
u_int booke_init(uint32_t, uint32_t);
extern int elf32_nxstack;
static void
cpu_e500_startup(void *dummy)
{
int indx, size;
/* Initialise the decrementer-based clock. */
decr_init();
/* Good {morning,afternoon,evening,night}. */
cpu_setup(PCPU_GET(cpuid));
printf("real memory = %ld (%ld MB)\n", ptoa(physmem),
ptoa(physmem) / 1048576);
realmem = physmem;
/* Display any holes after the first chunk of extended memory. */
if (bootverbose) {
printf("Physical memory chunk(s):\n");
for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
size = phys_avail[indx + 1] - phys_avail[indx];
printf("0x%08x - 0x%08x, %d bytes (%ld pages)\n",
phys_avail[indx], phys_avail[indx + 1] - 1,
size, size / 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();
/* Cpu supports execution permissions on the pages. */
elf32_nxstack = 1;
}
static char *
kenv_next(char *cp)
{
if (cp != NULL) {
while (*cp != 0)
cp++;
cp++;
if (*cp == 0)
cp = NULL;
}
return (cp);
}
void
print_kenv(void)
{
int len;
char *cp;
debugf("loader passed (static) kenv:\n");
if (kern_envp == NULL) {
debugf(" no env, null ptr\n");
return;
}
debugf(" kern_envp = 0x%08x\n", (u_int32_t)kern_envp);
len = 0;
for (cp = kern_envp; cp != NULL; cp = kenv_next(cp))
debugf(" %x %s\n", (u_int32_t)cp, cp);
}
void
print_kernel_section_addr(void)
{
debugf("kernel image addresses:\n");
debugf(" kernel_text = 0x%08x\n", (uint32_t)kernel_text);
debugf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext);
debugf(" _edata = 0x%08x\n", (uint32_t)_edata);
debugf(" __sbss_start = 0x%08x\n", (uint32_t)__sbss_start);
debugf(" __sbss_end = 0x%08x\n", (uint32_t)__sbss_end);
debugf(" __sbss_start = 0x%08x\n", (uint32_t)__bss_start);
debugf(" _end = 0x%08x\n", (uint32_t)_end);
}
u_int
booke_init(uint32_t arg1, uint32_t arg2)
{
struct pcpu *pc;
void *kmdp, *mdp;
vm_offset_t dtbp, end;
uint32_t csr;
kmdp = NULL;
end = (uintptr_t)_end;
dtbp = (vm_offset_t)NULL;
/*
* Handle the various ways we can get loaded and started:
* - FreeBSD's loader passes the pointer to the metadata
* in arg1, with arg2 undefined. arg1 has a value that's
* relative to the kernel's link address (i.e. larger
* than 0xc0000000).
* - Juniper's loader passes the metadata pointer in arg2
* and sets arg1 to zero. This is to signal that the
* loader maps the kernel and starts it at its link
* address (unlike the FreeBSD loader).
* - U-Boot passes the standard argc and argv parameters
* in arg1 and arg2 (resp). arg1 is between 1 and some
* relatively small number, such as 64K. arg2 is the
* physical address of the argv vector.
*/
if (arg1 > (uintptr_t)kernel_text) /* FreeBSD loader */
mdp = (void *)arg1;
else if (arg1 == 0) /* Juniper loader */
mdp = (void *)arg2;
else /* U-Boot */
mdp = NULL;
/*
* Parse metadata and fetch parameters.
*/
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 *);
dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
bootinfo = (uint32_t *)preload_search_info(kmdp,
MODINFO_METADATA | MODINFOMD_BOOTINFO);
#ifdef DDB
ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
#endif
}
} else {
bzero(__sbss_start, __sbss_end - __sbss_start);
bzero(__bss_start, _end - __bss_start);
}
#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)
while (1);
if (OF_init((void *)dtbp) != 0)
while (1);
if (fdt_immr_addr(CCSRBAR_VA) != 0)
while (1);
OF_interpret("perform-fixup", 0);
/* Initialize TLB1 handling */
tlb1_init(fdt_immr_pa);
/* Reset Time Base */
mttb(0);
/* 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 and store the pointer in SPR general 0. */
pc = &__pcpu[0];
pcpu_init(pc, 0, sizeof(struct pcpu));
pc->pc_curthread = &thread0;
__asm __volatile("mtsprg 0, %0" :: "r"(pc));
/* Initialize system mutexes. */
mutex_init();
/* Initialize the console before printing anything. */
cninit();
/* Print out some debug info... */
debugf("%s: console initialized\n", __func__);
debugf(" arg3 mdp = 0x%08x\n", (u_int32_t)mdp);
debugf(" end = 0x%08x\n", (u_int32_t)end);
debugf(" boothowto = 0x%08x\n", boothowto);
debugf(" kernel ccsrbar = 0x%08x\n", CCSRBAR_VA);
debugf(" MSR = 0x%08x\n", mfmsr());
debugf(" HID0 = 0x%08x\n", mfspr(SPR_HID0));
debugf(" HID1 = 0x%08x\n", mfspr(SPR_HID1));
debugf(" BUCSR = 0x%08x\n", mfspr(SPR_BUCSR));
__asm __volatile("msync; isync");
csr = ccsr_read4(OCP85XX_L2CTL);
debugf(" L2CTL = 0x%08x\n", csr);
debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp);
print_kernel_section_addr();
print_kenv();
//tlb1_print_entries();
//tlb1_print_tlbentries();
kdb_init();
#ifdef KDB
if (boothowto & RB_KDB)
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
#endif
/* Initialise platform module */
platform_probe_and_attach();
/* Initialise virtual memory. */
pmap_mmu_install(MMU_TYPE_BOOKE, 0);
pmap_bootstrap((uintptr_t)kernel_text, end);
debugf("MSR = 0x%08x\n", mfmsr());
//tlb1_print_entries();
//tlb1_print_tlbentries();
/* Initialize params/tunables that are derived from memsize. */
init_param2(physmem);
/* Finish setting up thread0. */
thread0.td_pcb = (struct pcb *)
((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE -
sizeof(struct pcb)) & ~15);
bzero((void *)thread0.td_pcb, sizeof(struct pcb));
pc->pc_curpcb = thread0.td_pcb;
/* Initialise the message buffer. */
msgbufinit(msgbufp, msgbufsize);
/* Enable Machine Check interrupt. */
mtmsr(mfmsr() | PSL_ME);
isync();
/* Enable D-cache if applicable */
csr = mfspr(SPR_L1CSR0);
if ((csr & L1CSR0_DCE) == 0) {
dcache_inval();
dcache_enable();
}
csr = mfspr(SPR_L1CSR0);
if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR0_DCE) == 0)
printf("L1 D-cache %sabled\n",
(csr & L1CSR0_DCE) ? "en" : "dis");
/* Enable L1 I-cache if applicable. */
csr = mfspr(SPR_L1CSR1);
if ((csr & L1CSR1_ICE) == 0) {
icache_inval();
icache_enable();
}
csr = mfspr(SPR_L1CSR1);
if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR1_ICE) == 0)
printf("L1 I-cache %sabled\n",
(csr & L1CSR1_ICE) ? "en" : "dis");
debugf("%s: SP = 0x%08x\n", __func__,
((uintptr_t)thread0.td_pcb - 16) & ~15);
return (((uintptr_t)thread0.td_pcb - 16) & ~15);
}
#define RES_GRANULE 32
extern uint32_t tlb0_miss_locks[];
/* Initialise a struct pcpu. */
void
cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
{
pcpu->pc_tid_next = TID_MIN;
#ifdef SMP
uint32_t *ptr;
int words_per_gran = RES_GRANULE / sizeof(uint32_t);
ptr = &tlb0_miss_locks[cpuid * words_per_gran];
pcpu->pc_booke_tlb_lock = ptr;
*ptr = TLB_UNLOCKED;
*(ptr + 1) = 0; /* recurse counter */
#endif
}
/*
* 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
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);
}
/* Shutdown the CPU as much as possible. */
void
cpu_halt(void)
{
mtmsr(mfmsr() & ~(PSL_CE | PSL_EE | PSL_ME | PSL_DE));
while (1);
}
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_DE;
tf->cpu.booke.dbcr0 |= (DBCR0_IDM | DBCR0_IC);
return (0);
}
int
ptrace_clear_single_step(struct thread *td)
{
struct trapframe *tf;
tf = td->td_frame;
tf->srr1 &= ~PSL_DE;
tf->cpu.booke.dbcr0 &= ~(DBCR0_IDM | DBCR0_IC);
return (0);
}
void
kdb_cpu_clear_singlestep(void)
{
register_t r;
r = mfspr(SPR_DBCR0);
mtspr(SPR_DBCR0, r & ~DBCR0_IC);
kdb_frame->srr1 &= ~PSL_DE;
}
void
kdb_cpu_set_singlestep(void)
{
register_t r;
r = mfspr(SPR_DBCR0);
mtspr(SPR_DBCR0, r | DBCR0_IC | DBCR0_IDM);
kdb_frame->srr1 |= PSL_DE;
}
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--;
}
}