/*
  * UAE - The Un*x Amiga Emulator
  *
  * AutoConfig devices
  *
  * Copyright 1995, 1996 Bernd Schmidt
  * Copyright 1996 Ed Hanway
  */

#include "sysconfig.h"
#include "sysdeps.h"

#include "options.h"
#include "uae.h"
#include "memory.h"
#include "custom.h"
#include "events.h"
#include "newcpu.h"
#include "autoconf.h"
#include "traps.h"

/* Commonly used autoconfig strings */

uaecptr EXPANSION_explibname, EXPANSION_doslibname, EXPANSION_uaeversion;
uaecptr EXPANSION_uaedevname, EXPANSION_explibbase = 0;
uaecptr EXPANSION_bootcode, EXPANSION_nullfunc;

/* ROM tag area memory access */

uae_u8 *rtarea;
uaecptr rtarea_base = RTAREA_DEFAULT;

static uae_u32 REGPARAM3 rtarea_lget (uaecptr) REGPARAM;
static uae_u32 REGPARAM3 rtarea_wget (uaecptr) REGPARAM;
static uae_u32 REGPARAM3 rtarea_bget (uaecptr) REGPARAM;
static void REGPARAM3 rtarea_lput (uaecptr, uae_u32) REGPARAM;
static void REGPARAM3 rtarea_wput (uaecptr, uae_u32) REGPARAM;
static void REGPARAM3 rtarea_bput (uaecptr, uae_u32) REGPARAM;
static uae_u8 *REGPARAM3 rtarea_xlate (uaecptr) REGPARAM;
static int REGPARAM3 rtarea_check (uaecptr addr, uae_u32 size) REGPARAM;

addrbank rtarea_bank = {
    rtarea_lget, rtarea_wget, rtarea_bget,
    rtarea_lput, rtarea_wput, rtarea_bput,
    rtarea_xlate, rtarea_check, NULL, L"UAE Boot ROM",
    rtarea_lget, rtarea_wget, ABFLAG_ROMIN
};

static uae_u8 *REGPARAM2 rtarea_xlate (uaecptr addr)
{
    addr &= 0xFFFF;
    return rtarea + addr;
}

static int REGPARAM2 rtarea_check (uaecptr addr, uae_u32 size)
{
    addr &= 0xFFFF;
    return (addr + size) <= 0xFFFF;
}

static uae_u32 REGPARAM2 rtarea_lget (uaecptr addr)
{
#ifdef JIT
    special_mem |= S_READ;
#endif
    addr &= 0xFFFF;
    return (uae_u32)(rtarea_wget (addr) << 16) + rtarea_wget (addr + 2);
}

static uae_u32 REGPARAM2 rtarea_wget (uaecptr addr)
{
#ifdef JIT
    special_mem |= S_READ;
#endif
    addr &= 0xFFFF;
    return (rtarea[addr] << 8) + rtarea[addr + 1];
}

static uae_u32 REGPARAM2 rtarea_bget (uaecptr addr)
{
#ifdef JIT
    special_mem |= S_READ;
#endif
    addr &= 0xFFFF;
    return rtarea[addr];
}

static void REGPARAM2 rtarea_lput (uaecptr addr, uae_u32 value)
{
#ifdef JIT
    special_mem |= S_WRITE;
#endif
}

static void REGPARAM2 rtarea_wput (uaecptr addr, uae_u32 value)
{
#ifdef JIT
    special_mem |= S_WRITE;
#endif
}

static void REGPARAM2 rtarea_bput (uaecptr addr, uae_u32 value)
{
#ifdef JIT
    special_mem |= S_WRITE;
#endif
}

/* some quick & dirty code to fill in the rt area and save me a lot of
 * scratch paper
 */

static int rt_addr;
static int rt_straddr;

uae_u32 addr (int ptr)
{
    return (uae_u32)ptr + rtarea_base;
}

void db (uae_u8 data)
{
    rtarea[rt_addr++] = data;
}

void dw (uae_u16 data)
{
    rtarea[rt_addr++] = (uae_u8)(data >> 8);
    rtarea[rt_addr++] = (uae_u8)data;
}

void dl (uae_u32 data)
{
    rtarea[rt_addr++] = data >> 24;
    rtarea[rt_addr++] = data >> 16;
    rtarea[rt_addr++] = data >> 8;
    rtarea[rt_addr++] = data;
}

uae_u8 dbg (uaecptr addr)
{
    addr -= rtarea_base;
    return rtarea[addr];
}

/* store strings starting at the end of the rt area and working
 * backward.  store pointer at current address
 */

uae_u32 ds_ansi (const uae_char *str)
{
    int len;

    if (!str)
	return addr (rt_straddr);
    len = strlen (str) + 1;
    rt_straddr -= len;
    strcpy ((uae_char*)rtarea + rt_straddr, str);
    return addr (rt_straddr);
}

uae_u32 ds (const TCHAR *str)
{
    char *s = ua (str);
    uae_u32 v = ds_ansi (s);
    xfree (s);
    return v;
}

void calltrap (uae_u32 n)
{
    dw (0xA000 + n);
}

void org (uae_u32 a)
{
    if ( ((a & 0xffff0000) != 0x00f00000) && ((a & 0xffff0000) != rtarea_base) )
	write_log (L"ORG: corrupt address! %08X", a);
    rt_addr = a & 0xffff;
}

uae_u32 here (void)
{
    return addr (rt_addr);
}

void align (int b)
{
    rt_addr = (rt_addr + b - 1) & ~(b - 1);
}

static uae_u32 REGPARAM2 nullfunc (TrapContext *context)
{
    write_log (L"Null function called\n");
    return 0;
}

static uae_u32 REGPARAM2 getchipmemsize (TrapContext *context)
{
    return allocated_chipmem;
}

static uae_u32 REGPARAM2 uae_puts (TrapContext *context)
{
    puts ((uae_u8*)get_real_address (m68k_areg (&context->regs, 0)));
    return 0;
}

void rtarea_init_mem (void)
{
    rtarea = mapped_malloc (0x10000, L"rtarea");
    if (!rtarea) {
	write_log (L"virtual memory exhausted (rtarea)!\n");
	abort ();
    }
    rtarea_bank.baseaddr = rtarea;
}

void rtarea_init (void)
{
    uae_u32 a;
    TCHAR uaever[100];

    rt_straddr = 0xFF00 - 2;
    rt_addr = 0;

    init_traps ();

    rtarea_init_mem ();
    memset (rtarea, 0, 0x10000);

    _stprintf (uaever, L"uae-%d.%d.%d", UAEMAJOR, UAEMINOR, UAESUBREV);

    EXPANSION_uaeversion = ds (uaever);
    EXPANSION_explibname = ds (L"expansion.library");
    EXPANSION_doslibname = ds (L"dos.library");
    EXPANSION_uaedevname = ds (L"uae.device");

    deftrap (NULL); /* Generic emulator trap */

    EXPANSION_nullfunc = here ();
    calltrap (deftrap (nullfunc));
    dw (RTS);

    a = here();
    /* Dummy trap - removing this breaks the filesys emulation. */
    org (rtarea_base + 0xFF00);
    calltrap (deftrap2 (nullfunc, TRAPFLAG_NO_RETVAL, L""));

    org (rtarea_base + 0xFF80);
    calltrap (deftrapres (getchipmemsize, TRAPFLAG_DORET, L"getchipmemsize"));

    org (rtarea_base + 0xFF10);
    calltrap (deftrapres (uae_puts, TRAPFLAG_NO_RETVAL, L"uae_puts"));
    dw (RTS);

    org (a);

#ifdef FILESYS
    filesys_install_code ();
#endif
#ifdef PICASSO96
    uaegfx_install_code ();
#endif

    uae_boot_rom_size = here() - rtarea_base;
    init_extended_traps ();
}

volatile int uae_int_requested = 0;

void set_uae_int_flag (void)
{
    rtarea[0xFFFB] = uae_int_requested & 1;
}

void rtarea_setup (void)
{
    uaecptr base = need_uae_boot_rom ();
    if (base) {
	write_log (L"RTAREA located at %08X\n", base);
	rtarea_base = base;
    }
}

uaecptr makedatatable (uaecptr resid, uaecptr resname, uae_u8 type, uae_s8 priority, uae_u16 ver, uae_u16 rev)
{
    uaecptr datatable = here ();

    dw (0xE000);		/* INITBYTE */
    dw (0x0008);		/* LN_TYPE */
    dw (type << 8);
    dw (0xE000);		/* INITBYTE */
    dw (0x0009);		/* LN_PRI */
    dw (priority << 8);
    dw (0xC000);		/* INITLONG */
    dw (0x000A);		/* LN_NAME */
    dl (resname);
    dw (0xE000);		/* INITBYTE */
    dw (0x000E);		/* LIB_FLAGS */
    dw (0x0600);		/* LIBF_SUMUSED | LIBF_CHANGED */
    dw (0xD000);		/* INITWORD */
    dw (0x0014);		/* LIB_VERSION */
    dw (ver);
    dw (0xD000);		/* INITWORD */
    dw (0x0016);		/* LIB_REVISION */
    dw (rev);
    dw (0xC000);		/* INITLONG */
    dw (0x0018);		/* LIB_IDSTRING */
    dl (resid);
    dw (0x0000);		/* end of table */
    return datatable;
}