/*      $NetBSD: boot.c,v 1.7 2022/02/16 23:49:27 riastradh 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 <lib/libsa/stand.h>
#include <lib/libsa/loadfile.h>
#include <lib/libkern/libkern.h>
#include <sys/reboot.h>
#include <sys/boot_flag.h>
#include <machine/bootinfo.h>
#include <machine/cpu.h>
#include <machine/iplcb.h>
#include <powerpc/spr.h>
#include <powerpc/oea/spr.h>

#include "boot.h"

char *names[] = {
        "in()",
};
#define NUMNAMES (sizeof (names) / sizeof (names[0]))

#define NAMELEN 128
char namebuf[NAMELEN];
char nametmp[NAMELEN];

unsigned char cregs[10];

char bootinfo[BOOTINFO_MAXSIZE];
struct btinfo_iplcb btinfo_iplcb;
struct btinfo_console btinfo_console;

/*struct ipl_cb iplcb;
struct ipl_directory ipldir;*/

extern u_long ns_per_tick;
extern char bootprog_name[], bootprog_rev[];

void boot(void *, void *);
static void exec_kernel(char *);

#define PSL_DR  (1<<4)
#define PSL_EE  0x00008000
#define BAT_BL_128K     0x00000000
#define BAT_BL_1M       0x0000001c
#define BAT_BL_2M       0x0000003c
#define BAT_W           0x00000040
#define BAT_I           0x00000020
#define BAT_M           0x00000010
#define BAT_G           0x00000008
#define BAT_X           0x00000004
#define BAT_Vs          0x00000002
#define BAT_Vu          0x00000001
#define BAT_PP_RW       0x00000002
#define BAT_RPN         (~0x1ffff)
#define BAT_EPI         (~0x1ffffL)
#define BAT_V           (BAT_Vs|BAT_Vu)
#define BAT_BL          0x00001ffc

#define BATU(va, len, v)        \
        (((va) & BAT_EPI) | ((len) & BAT_BL) | ((v) & BAT_V))
#define BATL(pa, wimg, pp)      \
        (((pa) & BAT_RPN) | (wimg) | (pp))


static void
setled(uint32_t val)
{
#ifdef POWER
        register_t savemsr, msr, savesr15;

        __asm volatile ("mfmsr %0" : "=r"(savemsr));
        msr = savemsr & ~PSL_DR;
        __asm volatile ("mtmsr %0" : : "r"(msr));

        __asm volatile ("mfsr %0,15;isync" : "=r"(savesr15));
        __asm volatile ("mtsr 15,%0" : : "r"(0x82040080));
        __asm volatile ("mtmsr %0" : : "r"(msr|PSL_DR));
        __asm volatile ("isync");
        *(uint32_t *)0xF0A00300 = val;
        __asm volatile ("mtmsr %0" : : "r"(savemsr));
        __asm volatile ("mtsr 15,%0;isync" : : "r"(savesr15));
#else
#ifdef NOTYET
        register_t savemsr, msr, batu, batl;

        /* turn on DR */
        __asm volatile ("mfmsr %0" : "=r"(savemsr));
        msr = savemsr|PSL_DR;
        __asm volatile ("mtmsr %0" : : "r"(msr));
        __asm volatile ("isync");

        /* set up a bat and map the whole NVRAM chunk */
        batl = BATL(0xFF600000, BAT_I|BAT_G, BAT_PP_RW);
        batu = BATU(0xFF600000, BAT_BL_1M, BAT_Vs);
        __asm volatile ("mtdbatl 1,%0; mtdbatu 1,%1;"
            ::  "r"(batl), "r"(batu));
        __asm volatile ("isync");

        *(volatile uint32_t *)0xFF600300 = val;
        __asm volatile ("eieio" ::: "memory");
        __asm volatile ("isync");

        /* put back to normal */
        __asm volatile ("mtmsr %0" : : "r"(savemsr));
        __asm volatile ("isync");
#endif /* NOTYET */
#endif
}


void
boot(void *iplcb_p, void *extiplcb_p)
{
        extern char _end[], _edata[];
        int n = 0;
        int addr, speed;
        /*unsigned int cpuvers;*/
        char *name, *cnname, *p;
        struct ipl_cb *iplcb_ptr;
        struct ipl_directory *dirp;
        struct ipl_info *infop;

        //setled(0x30100000); /* we have control */
        //for (;;);
        iplcb_ptr = (struct ipl_cb *)iplcb_p;
        dirp = &(iplcb_ptr->dir);

        /* Clear all of BSS */
        memset(_edata, 0, _end - _edata);

        /*
         * console init
         */
        //setled(0x30000000); /* attempting r14 setup */
        setup_iocc();
        //setled(0x31000000); /* attempting console init */
        cnname = cninit(&addr, &speed);
        printf("\n");
        //setled(0x31100000); /* we have the console */

        printf("IPLCB ptr = %p\n", iplcb_p);

        infop = (struct ipl_info *)((char *)iplcb_p + dirp->iplinfo_off);
        printf("Machine model = 0x%x\n", infop->model);
        printf("RAM = 0x%x\n", infop->ram_size);

        //dump_iplcb(iplcb_p);

        /* make bootinfo */
        /*
         * ipl control block
         */
        btinfo_iplcb.common.next = sizeof(btinfo_iplcb);
        btinfo_iplcb.common.type = BTINFO_IPLCB;
        if (iplcb_ptr) {
                btinfo_iplcb.addr = (void *)iplcb_p;
        } else {
                printf("Warning: no IPL Control Block.\n");
                btinfo_iplcb.addr = 0;
        }

        /*
         * console
         */
        btinfo_console.common.next = sizeof(btinfo_console);
        btinfo_console.common.type = BTINFO_CONSOLE;
        strcpy(btinfo_console.devname, cnname);
        btinfo_console.addr = addr;
        btinfo_console.speed = speed;

        p = bootinfo;
        memcpy(p, (void *)&btinfo_iplcb, sizeof(btinfo_iplcb));
        p += sizeof(btinfo_iplcb);
        memcpy(p, (void *)&btinfo_console, sizeof(btinfo_console));
        p += sizeof(btinfo_console);

        /*
         * load kernel if attached
         */
        init_in(RELOC);

        setled(0x38000000); /* attempting boot */
        printf("\n");
        printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev);

        for (;;) {
                name = names[n++];
                if (n >= NUMNAMES)
                        n = 0;
                setled(0x38100000 + (0x100000 * n));
                exec_kernel(name);
                setled(0x39900000); /* boot failed! */
        }
}

/*
 * Exec kernel
 */
static void
exec_kernel(char *name)
{
        int howto = 0;
        char c, *ptr;
        u_long marks[MARK_MAX];
#ifdef DBMONITOR
        int go_monitor;
        extern int db_monitor(void);

ret:
#endif /* DBMONITOR */
        printf("\nBoot: ");
        memset(namebuf, 0, sizeof (namebuf));
        if (tgets(namebuf) == -1)
                printf("\n");

        ptr = namebuf;
#ifdef DBMONITOR
        go_monitor = 0;
        if (*ptr == '!') {
                if (*(++ptr) == NULL) {
                        db_monitor();
                        printf("\n");
                        goto ret;
                } else {
                        go_monitor++;
                }
        }
#endif /* DBMONITOR */
        while ((c = *ptr)) {
                while (c == ' ')
                        c = *++ptr;
                if (!c)
                        goto next;
                if (c == '-') {
                        while ((c = *++ptr) && c != ' ')
                                BOOT_FLAG(c, howto);
                } else {
                        name = ptr;
                        while ((c = *++ptr) && c != ' ');
                        if (c)
                                *ptr++ = 0;
                }
        }

next:
        printf("Loading %s", name);
        if (howto)
                printf(" (howto 0x%x)", howto);
        printf("\n");

        marks[MARK_START] = 0;
        if (loadfile(name, marks, LOAD_ALL) == 0) {
#ifdef DBMONITOR
                if (go_monitor) {
                        db_monitor();
                        printf("\n");
                }
#endif /* DBMONITOR */

                printf("start=0x%lx\n\n", marks[MARK_ENTRY]);
                delay(1000);
                __syncicache((void *)marks[MARK_ENTRY],
                        (u_int)marks[MARK_SYM] - (u_int)marks[MARK_ENTRY]);
                printf("About to run\n");
                run((void *)marks[MARK_SYM],
                    (void *)marks[MARK_END],
                    (void *)howto,
                    (void *)bootinfo,
                    (void *)marks[MARK_ENTRY]);
        }
}