freebsd-dev/sys/mips/gxemul/gxemul_machdep.c
Pedro F. Giffuni 19d3b47b92 sys/mips: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 15:07:26 +00:00

248 lines
5.3 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org>
* 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 "opt_ddb.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 <machine/clock.h>
#include <machine/cpu.h>
#include <machine/cpuregs.h>
#include <machine/hwfunc.h>
#include <machine/md_var.h>
#include <machine/pmap.h>
#include <machine/trap.h>
#ifdef SMP
#include <sys/smp.h>
#include <machine/smp.h>
#endif
#include <mips/gxemul/mpreg.h>
extern int *edata;
extern int *end;
void
platform_cpu_init()
{
/* Nothing special */
}
static void
mips_init(void)
{
int i;
for (i = 0; i < 10; i++) {
phys_avail[i] = 0;
}
/* phys_avail regions are in bytes */
phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
phys_avail[1] = ctob(realmem);
dump_avail[0] = phys_avail[0];
dump_avail[1] = phys_avail[1];
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
}
/*
* Perform a board-level soft-reset.
*
* XXXRW: Does gxemul have a moral equivalent to board-level reset?
*/
void
platform_reset(void)
{
panic("%s: not yet", __func__);
}
void
platform_start(__register_t a0, __register_t a1, __register_t a2,
__register_t a3)
{
vm_offset_t kernend;
uint64_t platform_counter_freq;
int argc = a0;
char **argv = (char **)a1;
char **envp = (char **)a2;
int i;
/* clear the BSS and SBSS segments */
kernend = (vm_offset_t)&end;
memset(&edata, 0, kernend - (vm_offset_t)(&edata));
mips_postboot_fixup();
mips_pcpu0_init();
/*
* XXXRW: Support for the gxemul real-time clock required in order to
* usefully determine our emulated timer frequency. Go with something
* classic as the default in the mean time.
*/
platform_counter_freq = MIPS_DEFAULT_HZ;
mips_timer_early_init(platform_counter_freq);
cninit();
printf("entry: platform_start()\n");
bootverbose = 1;
if (bootverbose) {
printf("cmd line: ");
for (i = 0; i < argc; i++)
printf("%s ", argv[i]);
printf("\n");
if (envp != NULL) {
printf("envp:\n");
for (i = 0; envp[i]; i += 2)
printf("\t%s = %s\n", envp[i], envp[i+1]);
} else {
printf("no envp.\n");
}
}
realmem = btoc(GXEMUL_MP_DEV_READ(GXEMUL_MP_DEV_MEMORY));
mips_init();
mips_timer_init_params(platform_counter_freq, 0);
}
#ifdef SMP
void
platform_ipi_send(int cpuid)
{
GXEMUL_MP_DEV_WRITE(GXEMUL_MP_DEV_IPI_ONE, (1 << 16) | cpuid);
}
void
platform_ipi_clear(void)
{
GXEMUL_MP_DEV_WRITE(GXEMUL_MP_DEV_IPI_READ, 0);
}
int
platform_ipi_hardintr_num(void)
{
return (GXEMUL_MP_DEV_IPI_INTERRUPT - 2);
}
int
platform_ipi_softintr_num(void)
{
return (-1);
}
struct cpu_group *
platform_smp_topo(void)
{
return (smp_topo_none());
}
void
platform_init_ap(int cpuid)
{
int ipi_int_mask, clock_int_mask;
/*
* Unmask the clock and ipi interrupts.
*/
clock_int_mask = hard_int_mask(5);
ipi_int_mask = hard_int_mask(platform_ipi_hardintr_num());
set_intr_mask(ipi_int_mask | clock_int_mask);
}
void
platform_cpu_mask(cpuset_t *mask)
{
unsigned i, n;
n = GXEMUL_MP_DEV_READ(GXEMUL_MP_DEV_NCPUS);
CPU_ZERO(mask);
for (i = 0; i < n; i++)
CPU_SET(i, mask);
}
int
platform_processor_id(void)
{
return (GXEMUL_MP_DEV_READ(GXEMUL_MP_DEV_WHOAMI));
}
int
platform_start_ap(int cpuid)
{
GXEMUL_MP_DEV_WRITE(GXEMUL_MP_DEV_STARTADDR, (intptr_t)mpentry);
GXEMUL_MP_DEV_WRITE(GXEMUL_MP_DEV_START, cpuid);
return (0);
}
#endif /* SMP */