/* $NetBSD: machdep.c,v 1.57 2020/07/22 01:24:39 msaitoh Exp $ */

/*-
 * 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) 1988 University of Utah.
 * 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
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.57 2020/07/22 01:24:39 msaitoh Exp $");

#include "opt_ddb.h"
#include "opt_kgdb.h"

#include "opt_memsize.h"
#include "opt_modular.h"
#include "opt_ethaddr.h"

#include <sys/param.h>
#include <sys/boot_flag.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/kcore.h>
#include <sys/kernel.h>
#include <sys/ksyms.h>
#include <sys/mount.h>
#include <sys/reboot.h>
#include <sys/systm.h>
#include <sys/termios.h>
#include <sys/cpu.h>

#include <net/if.h>
#include <net/if_ether.h>

#include <uvm/uvm_extern.h>

#include <dev/cons.h>

#include "ksyms.h"

#if NKSYMS || defined(DDB) || defined(MODULAR)
#include <mips/db_machdep.h>
#include <ddb/db_extern.h>
#endif

#include <mips/cache.h>
#include <mips/locore.h>

#include <machine/yamon.h>

#include <evbmips/alchemy/board.h>

#include <mips/alchemy/dev/aupcivar.h>
#include <mips/alchemy/dev/aupcmciavar.h>
#include <mips/alchemy/dev/auspivar.h>
#include <mips/alchemy/include/aureg.h>
#include <mips/alchemy/include/auvar.h>
#include <mips/alchemy/include/aubusvar.h>

#include "com.h"
#if NCOM > 0

int	aucomcnrate = 0;
#endif /* NAUCOM > 0 */

#include "ohci.h"

/* Maps for VM objects. */
struct vm_map *phys_map = NULL;

int maxmem;			/* max memory per process */

int mem_cluster_cnt;
phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];

yamon_env_var *yamon_envp;
struct mips_bus_space alchemy_cpuregt;

void	mach_init(int, char **, yamon_env_var *, u_long); /* XXX */

void
mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize)
{
	bus_space_handle_t sh;
	void *kernend;
	const char *cp;
	int freqok, howto, i;
	const struct alchemy_board *board;

	extern char edata[], end[];	/* XXX */

	board = board_info();
	KASSERT(board != NULL);

	/* clear the BSS segment */
	kernend = (void *)mips_round_page(end);
	memset(edata, 0, (char *)kernend - edata);

	/* set CPU model info for sysctl_hw */
	cpu_setmodel("%s", board->ab_name);

	/* save the yamon environment pointer */
	yamon_envp = envp;

	/* Use YAMON callbacks for early console I/O */
	cn_tab = &yamon_promcd;

	/*
	 * 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(NULL, false);

	uvm_md_init();

	/*
	 * Use YAMON's CPU frequency if available.
	 */
	freqok = yamon_setcpufreq(1);

	/*
	 * Initialize bus space tags.
	 */
	au_cpureg_bus_mem_init(&alchemy_cpuregt, &alchemy_cpuregt);
	aubus_st = &alchemy_cpuregt;

	/*
	 * Calibrate the timer if YAMON failed to tell us.
	 */
	if (!freqok) {
		bus_space_map(aubus_st, PC_BASE, PC_SIZE, 0, &sh);
		au_cal_timers(aubus_st, sh);
		bus_space_unmap(aubus_st, sh, PC_SIZE);
	}

	/*
	 * Perform board-specific initialization.
	 */
	board->ab_init();

	/*
	 * Bring up the console.
	 */
#if NCOM > 0
#ifdef CONSPEED
	if (aucomcnrate == 0)
		aucomcnrate = CONSPEED;
#else /* !CONSPEED */
	/*
	 * Learn default console speed.  We use the YAMON environment,
	 * though we could probably also figure it out by checking the
	 * aucom registers directly.
	 */
	if ((aucomcnrate == 0) && ((cp = yamon_getenv("modetty0")) != NULL))
		aucomcnrate = strtoul(cp, NULL, 0);

	if (aucomcnrate == 0) {
		printf("FATAL: `modetty0' YAMON variable not set.  Set it\n");
		printf("       to the speed of the console and try again.\n");
		printf("       Or, build a kernel with the `CONSPEED' "
		    "option.\n");
		panic("mach_init");
	}
#endif /* CONSPEED */

	/*
	 * Delay to allow firmware putchars to complete.
	 * FIFO depth * character time.
	 * character time = (1000000 / (defaultrate / 10))
	 */
	delay(160000000 / aucomcnrate);
	if (com_aubus_cnattach(UART0_BASE, aucomcnrate) != 0)
		panic("mach_init: unable to initialize serial console");

#else /* NCOM > 0 */
	panic("mach_init: not configured to use serial console");
#endif /* NAUCOM > 0 */

	/*
	 * Look at arguments passed to us and compute boothowto.
	 */
	boothowto = RB_AUTOBOOT;
#ifdef KADB
	boothowto |= RB_KDB;
#endif
	for (i = 1; i < argc; i++) {
		for (cp = argv[i]; *cp; cp++) {
			/* Ignore superfluous '-', if there is one */
			if (*cp == '-')
				continue;

			howto = 0;
			BOOT_FLAG(*cp, howto);
			if (! howto)
				printf("bootflag '%c' not recognised\n", *cp);
			else
				boothowto |= howto;
		}
	}

	/*
	 * Determine the memory size.  Use the `memsize' PMON
	 * variable.  If that's not available, panic.
	 *
	 * Note: Reserve the first page!  That's where the trap
	 * vectors are located.
	 */

#if defined(MEMSIZE)
	memsize = MEMSIZE;
#else
	if (memsize == 0) {
		if ((cp = yamon_getenv("memsize")) != NULL)
			memsize = strtoul(cp, NULL, 0);
		else {
			printf("FATAL: `memsize' YAMON variable not set.  Set it to\n");
			printf("       the amount of memory (in MB) and try again.\n");
			printf("       Or, build a kernel with the `MEMSIZE' "
			    "option.\n");
			panic("mach_init");
		}
	}
#endif /* MEMSIZE */
	printf("Memory size: 0x%08lx\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.
	 */
	mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend, 
	    mem_clusters, mem_cluster_cnt, NULL, 0);

	/*
	 * Initialize message buffer (at end of core).
	 */
	mips_init_msgbuf();

	/*
	 * Initialize the virtual memory system.
	 */
	pmap_bootstrap();

	/*
	 * Allocate uarea page for lwp0 and set it.
	 */
	mips_init_lwp0_uarea();

	/*
	 * Initialize debuggers, and break into them, if appropriate.
	 */
#ifdef DDB
	if (boothowto & RB_KDB)
		Debugger();
#endif
}

void
consinit(void)
{

	/*
	 * Everything related to console initialization is done
	 * in mach_init().
	 */
}

void
cpu_startup(void)
{
	cpu_startup_common();
}

void
cpu_reboot(int howto, char *bootstr)
{
	static int waittime = -1;
	const struct alchemy_board *board;

	/* Take a snapshot before clobbering any registers. */
	savectx(curpcb);

	board = board_info();
	KASSERT(board != NULL);

	/* 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();

	pmf_system_shutdown(boothowto);

	if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN)
		if (board && board->ab_poweroff)
			board->ab_poweroff();

	/*
	 * YAMON 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("resetting board...\n\n");

	/*
	 * Try to use board-specific reset logic, which might involve a better
	 * hardware reset.
	 */
	if (board->ab_reboot)
		board->ab_reboot();

#if 1
	/* XXX
	 * For some reason we are leaving the ethernet MAC in a state where
	 * YAMON isn't happy with it.  So just call the reset vector (grr,
	 * Alchemy YAMON doesn't have a "reset" command).
	 */
	mips_icache_sync_all();
	mips_dcache_wbinv_all();
	__asm volatile("jr	%0" :: "r"(MIPS_RESET_EXC_VEC));
#else
	printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting...");
	yamon_exit(boothowto);
	printf("Oops, back from yamon_exit()\n\nSpinning...");
#endif
	for (;;)
		/* spin forever */ ;	/* XXX */
	/*NOTREACHED*/
}

/*
 * Export our interrupt map function so aupci can find it.
 */
int
aupci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
	const struct alchemy_board *board;

	board = board_info();
	if (board->ab_pci_intr_map != NULL)
		return (board->ab_pci_intr_map(pa, ihp));
	return 1;
}

struct aupcmcia_machdep *
aupcmcia_machdep(void)
{
	const struct alchemy_board *board;

	board = board_info();
	return (board->ab_pcmcia);
}

const struct auspi_machdep *
auspi_machdep(bus_addr_t ba)
{
	const struct alchemy_board *board;

	board = board_info();
	if (board->ab_spi != NULL)
		return (board->ab_spi(ba));
	return NULL;
}
