freebsd-dev/sys/mips/sibyte/sb_machdep.c
Warner Losh f94784e818 Add sibyte device support.
Submitted by:	Neelkanth Natu
2009-07-04 03:05:48 +00:00

260 lines
5.4 KiB
C

/*-
* Copyright (c) 2007 Bruce M. Simpson.
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <machine/cpuregs.h>
#include "opt_ddb.h"
#include "opt_kdb.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/imgact.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/cons.h>
#include <sys/exec.h>
#include <sys/ucontext.h>
#include <sys/proc.h>
#include <sys/kdb.h>
#include <sys/ptrace.h>
#include <sys/reboot.h>
#include <sys/signalvar.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
#include <sys/user.h>
#include <vm/vm.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <machine/cache.h>
#include <machine/clock.h>
#include <machine/cpu.h>
#include <machine/cpuinfo.h>
#include <machine/cpufunc.h>
#include <machine/cpuregs.h>
#include <machine/hwfunc.h>
#include <machine/intr_machdep.h>
#include <machine/locore.h>
#include <machine/md_var.h>
#include <machine/pte.h>
#include <machine/sigframe.h>
#include <machine/trap.h>
#include <machine/vmparam.h>
#ifdef CFE
#include <dev/cfe/cfe_api.h>
#endif
#include "sb_scd.h"
#ifdef DDB
#ifndef KDB
#error KDB must be enabled in order for DDB to work!
#endif
#endif
#ifdef CFE
extern uint32_t cfe_handle;
extern uint32_t cfe_vector;
#endif
#ifdef CFE_ENV
extern void cfe_env_init(void);
#endif
extern int *edata;
extern int *end;
static void
mips_init(void)
{
int i, cfe_mem_idx, tmp;
uint64_t maxmem;
#ifdef CFE_ENV
cfe_env_init();
#endif
TUNABLE_INT_FETCH("boothowto", &boothowto);
if (boothowto & RB_VERBOSE)
bootverbose++;
#ifdef MAXMEM
tmp = MAXMEM;
#else
tmp = 0;
#endif
TUNABLE_INT_FETCH("hw.physmem", &tmp);
maxmem = (uint64_t)tmp * 1024;
#ifdef CFE
/*
* Query DRAM memory map from CFE.
*/
physmem = 0;
cfe_mem_idx = 0;
for (i = 0; i < 10; i += 2) {
int result;
uint64_t addr, len, type;
result = cfe_enummem(cfe_mem_idx++, 0, &addr, &len, &type);
if (result < 0) {
phys_avail[i] = phys_avail[i + 1] = 0;
break;
}
KASSERT(type == CFE_MI_AVAILABLE,
("CFE DRAM region is not available?"));
if (bootverbose)
printf("cfe_enummem: 0x%016jx/%llu.\n", addr, len);
if (maxmem != 0) {
if (addr >= maxmem) {
printf("Ignoring %llu bytes of memory at 0x%jx "
"that is above maxmem %dMB\n",
len, addr,
(int)(maxmem / (1024 * 1024)));
continue;
}
if (addr + len > maxmem) {
printf("Ignoring %llu bytes of memory "
"that is above maxmem %dMB\n",
(addr + len) - maxmem,
(int)(maxmem / (1024 * 1024)));
len = maxmem - addr;
}
}
phys_avail[i] = addr;
if (i == 0 && addr == 0) {
/*
* If this is the first physical memory segment probed
* from CFE, omit the region at the start of physical
* memory where the kernel has been loaded.
*/
phys_avail[i] += MIPS_KSEG0_TO_PHYS((vm_offset_t)&end);
}
phys_avail[i + 1] = addr + len;
physmem += len;
}
realmem = btoc(physmem);
#endif
physmem = realmem;
init_param1();
init_param2(physmem);
mips_cpu_init();
pmap_bootstrap();
mips_proc0_init();
mutex_init();
kdb_init();
#ifdef KDB
if (boothowto & RB_KDB)
kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
#endif
}
void
platform_halt(void)
{
}
void
platform_identify(void)
{
}
void
platform_reset(void)
{
/*
* XXX SMP
* XXX flush data caches
*/
sb_system_reset();
}
void
platform_trap_enter(void)
{
}
void
platform_trap_exit(void)
{
}
void
platform_start(__register_t a0 __unused, __register_t a1 __unused,
__register_t a2 __unused, __register_t a3 __unused)
{
vm_offset_t kernend;
/* clear the BSS and SBSS segments */
memset(&edata, 0, (vm_offset_t)&end - (vm_offset_t)&edata);
kernend = round_page((vm_offset_t)&end);
#ifdef CFE
/*
* Initialize CFE firmware trampolines before
* we initialize the low-level console.
*/
if (cfe_handle != 0)
cfe_init(cfe_handle, cfe_vector);
#endif
cninit();
#ifdef CFE
if (cfe_handle == 0)
panic("CFE was not detected by locore.\n");
#endif
mips_init();
mips_timer_init_params(sb_cpu_speed(), 0);
}