NetBSD-5.0.2/sys/arch/evbmips/atheros/machdep.c
/* $NetBSD: machdep.c,v 1.13 2008/07/02 17:28:55 ad Exp $ */
/*
* Copyright (c) 2006 Urbana-Champaign Independent Media Center.
* Copyright (c) 2006 Garrett D'Amore.
* All rights reserved.
*
* Portions of this code were written by Garrett D'Amore for the
* Champaign-Urbana Community Wireless Network Project.
*
* 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 acknowledgements:
* This product includes software developed by the Urbana-Champaign
* Independent Media Center.
* This product includes software developed by Garrett D'Amore.
* 4. Urbana-Champaign Independent Media Center's name and Garrett
* D'Amore's name may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT
* MEDIA CENTER AND GARRETT D'AMORE ``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 URBANA-CHAMPAIGN INDEPENDENT
* MEDIA CENTER OR GARRETT D'AMORE 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) 2006 Itronix Inc.
* All rights reserved.
*
* Portions written by Garrett D'Amore for Itronix Inc.
*
* 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. The name of Itronix Inc. may not be used to endorse
* or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``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 ITRONIX INC. 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) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department, The Mach Operating System project at
* Carnegie-Mellon University and Ralph Campbell.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)machdep.c 8.3 (Berkeley) 1/12/94
* from: Utah Hdr: machdep.c 1.63 91/04/24
*/
/*
* Copyright (c) 1988 University of Utah.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department, The Mach Operating System project at
* Carnegie-Mellon University and Ralph Campbell.
*
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)machdep.c 8.3 (Berkeley) 1/12/94
* from: Utah Hdr: machdep.c 1.63 91/04/24
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.13 2008/07/02 17:28:55 ad Exp $");
#include "opt_ddb.h"
#include "opt_kgdb.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/user.h>
#include <sys/mount.h>
#include <sys/kcore.h>
#include <sys/boot_flag.h>
#include <sys/termios.h>
#include <sys/ksyms.h>
#include <uvm/uvm_extern.h>
#include <dev/cons.h>
#include "ksyms.h"
#if NKSYMS || defined(DDB) || defined(LKM)
#include <machine/db_machdep.h>
#include <ddb/db_extern.h>
#endif
#include <mips/cache.h>
#include <mips/locore.h>
#include <mips/cpuregs.h>
#include <mips/atheros/include/ar531xvar.h>
#include <mips/atheros/include/arbusvar.h>
struct user *proc0paddr;
/* Our exported CPU info; we can have only one. */
struct cpu_info cpu_info_store;
/* Maps for VM objects. */
struct vm_map *mb_map = NULL;
struct vm_map *phys_map = NULL;
int physmem; /* # pages of physical memory */
int maxmem; /* max memory per process */
int mem_cluster_cnt;
phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
void mach_init(void); /* XXX */
static void
cal_timer(void)
{
uint32_t cntfreq;
cntfreq = curcpu()->ci_cpu_freq = ar531x_cpu_freq();
/* MIPS 4Kc CP0 counts every other clock */
if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
cntfreq /= 2;
curcpu()->ci_cycles_per_hz = (cntfreq + hz / 2) / hz;
/* Compute number of cycles per 1us (1/MHz). 0.5MHz is for roundup. */
curcpu()->ci_divisor_delay = ((cntfreq + 500000) / 1000000);
}
void
mach_init(void)
{
void *kernend;
u_long first, last;
void * v;
uint32_t memsize;
extern char edata[], end[]; /* XXX */
/* clear the BSS segment */
kernend = (void *)mips_round_page(end);
memset(edata, 0, (char *)kernend - edata);
/* setup early console */
ar531x_early_console();
/* set CPU model info for sysctl_hw */
snprintf(cpu_model, 64, "%s", ar531x_cpuname());
/*
* Set up the exception vectors and CPU-specific function
* vectors early on. We need the wbflush() vector set up
* before comcnattach() is called (or at least before the
* first printf() after that is called).
* Sets up mips_cpu_flags that may be queried by other
* functions called during startup.
* Also clears the I+D caches.
*/
mips_vector_init();
/*
* Calibrate timers.
*/
cal_timer();
/*
* Set the VM page size.
*/
uvm_setpagesize();
/*
* Look at arguments passed to us and compute boothowto.
*/
boothowto = RB_AUTOBOOT;
#ifdef KADB
boothowto |= RB_KDB;
#endif
/*
* This would be a good place to parse a boot command line, if
* we got one from the bootloader. Right now we have no way to
* get one from e.g. vxworks.
*/
/*
* Determine the memory size.
*
* Note: Reserve the first page! That's where the trap
* vectors are located.
*/
memsize = ar531x_memsize();
printf("Memory size: 0x%08x\n", memsize);
physmem = btoc(memsize);
mem_clusters[mem_cluster_cnt].start = PAGE_SIZE;
mem_clusters[mem_cluster_cnt].size =
memsize - mem_clusters[mem_cluster_cnt].start;
mem_cluster_cnt++;
/*
* Load the rest of the available pages into the VM system.
*/
first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
last = mem_clusters[0].start + mem_clusters[0].size;
uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
VM_FREELIST_DEFAULT);
/*
* Initialize message buffer (at end of core).
*/
mips_init_msgbuf();
/*
* Initialize the virtual memory system.
*/
pmap_bootstrap();
/*
* Init mapping for u page(s) for proc0.
*/
v = (void *) uvm_pageboot_alloc(USPACE);
lwp0.l_addr = proc0paddr = (struct user *)v;
lwp0.l_md.md_regs = (struct frame *)((char *)v + USPACE) - 1;
proc0paddr->u_pcb.pcb_context[11] =
MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */
/*
* Initialize busses.
*/
ar531x_businit();
/*
* Turn off (ignore) the hardware watchdog. If we got this
* far, then we shouldn't need it anymore.
*/
ar531x_wdog(0);
/*
* Turn off watchpoint that may have been enabled by the
* PROM. VxWorks bootloader seems to leave one set.
*/
__asm volatile (
"mtc0 $0, $" ___STRING(MIPS_COP_0_WATCH_LO) " \n\t"
"nop\n\t"
"nop\n\t");
/*
* Initialize debuggers, and break into them, if appropriate.
*/
#if NKSYMS || defined(DDB) || defined(LKM)
ksyms_init(0, 0, 0);
#endif
#ifdef DDB
if (boothowto & RB_KDB)
Debugger();
#endif
}
void
consinit(void)
{
/*
* Everything related to console initialization is done
* in mach_init().
*/
ar531x_consinit();
}
void
cpu_startup(void)
{
char pbuf[9];
vaddr_t minaddr, maxaddr;
#ifdef DEBUG
extern int pmapdebug; /* XXX */
int opmapdebug = pmapdebug;
pmapdebug = 0; /* Shut up pmap debug during bootstrap */
#endif
/*
* Good {morning,afternoon,evening,night}.
*/
printf("%s%s", copyright, version);
printf("%s\n", cpu_model);
format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
printf("total memory = %s\n", pbuf);
minaddr = 0;
/*
* Allocate a submap for physio
*/
phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
VM_PHYS_SIZE, 0, FALSE, NULL);
/*
* No need to allocate an mbuf cluster submap. Mbuf clusters
* are allocated via the pool allocator, and we use KSEG to
* map those pages.
*/
#ifdef DEBUG
pmapdebug = opmapdebug;
#endif
format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
printf("avail memory = %s\n", pbuf);
}
void
cpu_reboot(int howto, char *bootstr)
{
static int waittime = -1;
/* Take a snapshot before clobbering any registers. */
if (curproc)
savectx((struct user *)curpcb);
/* If "always halt" was specified as a boot flag, obey. */
if (boothowto & RB_HALT)
howto |= RB_HALT;
boothowto = howto;
/* If system is cold, just halt. */
if (cold) {
boothowto |= RB_HALT;
goto haltsys;
}
if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) {
waittime = 0;
/*
* Synchronize the disks....
*/
vfs_shutdown();
/*
* If we've been adjusting the clock, the todr
* will be out of synch; adjust it now.
*/
resettodr();
}
/* Disable interrupts. */
splhigh();
if (boothowto & RB_DUMP)
dumpsys();
haltsys:
/* Run any shutdown hooks. */
doshutdownhooks();
#if 0
if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN)
if (board && board->ab_poweroff)
board->ab_poweroff();
#endif
/*
* Firmware may autoboot (depending on settings), and we cannot pass
* flags to it (at least I haven't figured out how to yet), so
* we "pseudo-halt" now.
*/
if (boothowto & RB_HALT) {
printf("\n");
printf("The operating system has halted.\n");
printf("Please press any key to reboot.\n\n");
cnpollc(1); /* For proper keyboard command handling */
cngetc();
cnpollc(0);
}
printf("reseting board...\n\n");
mips_icache_sync_all();
mips_dcache_wbinv_all();
__asm volatile("jr %0" :: "r"(MIPS_RESET_EXC_VEC));
printf("Oops, back from reset\n\nSpinning...");
for (;;)
/* spin forever */ ; /* XXX */
/*NOTREACHED*/
}