/*      $NetBSD: arcbios_stubs.S,v 1.1 2020/08/14 16:53:06 skrll Exp $  */

/*-
 * Copyright (c) 1996 M. Warner Losh.  All rights reserved.
 * Copyright (c) 1996, 1997, 1998 Per Fogelstrom.  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. 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.
 */

#include <machine/asm.h>

/*
 *      ARC Bios trampoline code.
 *      Note we have to save/restore reserved MIPS_CURLWP register.
 */
#define ARC_Call(Name,Offset)                           \
        .text                                           ;\
        .ent    Name                                    ;\
        .align  3                                       ;\
        .set    noreorder                               ;\
        .globl  Name                                    ;\
Name:                                                   ;\
        subu    $29, CALLFRAME_SIZ                      ;\
        sw      $31, CALLFRAME_RA($29)                  ;\
        sw      $16, CALLFRAME_SP($29)                  ;\
        lw      $2, 0x80001020                          ;\
        lw      $2, Offset($2)                          ;\
        jalr    $2                                      ;\
         move   $16, MIPS_CURLWP                        ;\
        move    MIPS_CURLWP, $16                        ;\
        lw      $31, CALLFRAME_RA($29)                  ;\
        lw      $16, CALLFRAME_SP($29)                  ;\
        j       $31                                     ;\
         addu   $29, CALLFRAME_SIZ                      ;\
        .end    Name

#define ARC_Call5(Name,Offset)                          \
        .text                                           ;\
        .ent     #Name                                  ;\
        .align  3                                       ;\
        .set    noreorder                               ;\
        .globl  Name                                    ;\
Name:                                                   ;\
        subu    $29, CALLFRAME_SIZ + 4                  ;\
        sw      $31, CALLFRAME_RA + 4($29)              ;\
        sw      $16, CALLFRAME_SP + 4($29)              ;\
        lw      $12, CALLFRAME_SIZ + 4 + 16($29)        ;\
        sw      $12, 16($29)                            ;\
        lw      $2, 0x80001020                          ;\
        lw      $2, Offset($2)                          ;\
        jalr    $2                                      ;\
         move   $16, MIPS_CURLWP                        ;\
        move    MIPS_CURLWP, $16                        ;\
        lw      $31, CALLFRAME_RA + 4($29)              ;\
        lw      $16, CALLFRAME_SP + 4($29)              ;\
        j       $31                                     ;\
         addu   $29, CALLFRAME_SIZ + 4                  ;\
        .end    Name

ARC_Call(Bios_Load,                     0x00);
ARC_Call5(Bios_Invoke,                  0x04);
ARC_Call(Bios_Execute,                  0x08);
ARC_Call(Bios_Halt,                     0x0c);
ARC_Call(Bios_PowerDown,                0x10);
ARC_Call(Bios_Restart,                  0x14);
ARC_Call(Bios_Reboot,                   0x18);
ARC_Call(Bios_EnterInteractiveMode,     0x1c);
ARC_Call(Bios_Unused1,                  0x20);  /* return_from_main? */
ARC_Call(Bios_GetPeer,                  0x24);
ARC_Call(Bios_GetChild,                 0x28);
ARC_Call(Bios_GetParent,                0x2c);
ARC_Call(Bios_GetConfigurationData,     0x30);
ARC_Call(Bios_AddChild,                 0x34);
ARC_Call(Bios_DeleteComponent,          0x38);
ARC_Call(Bios_GetComponent,             0x3c);
ARC_Call(Bios_SaveConfiguration,        0x40);
ARC_Call(Bios_GetSystemId,              0x44);
ARC_Call(Bios_GetMemoryDescriptor,      0x48);
ARC_Call(Bios_Unused2,                  0x4c);  /* signal??? */
ARC_Call(Bios_GetTime,                  0x50);
ARC_Call(Bios_GetRelativeTime,          0x54);
ARC_Call(Bios_GetDirectoryEntry,        0x58);
ARC_Call(Bios_Open,                     0x5c);
ARC_Call(Bios_Close,                    0x60);
ARC_Call(Bios_Read,                     0x64);
ARC_Call(Bios_GetReadStatus,            0x68);
ARC_Call(Bios_Write,                    0x6c);
ARC_Call(Bios_Seek,                     0x70);
ARC_Call(Bios_Mount,                    0x74);
ARC_Call(Bios_GetEnvironmentVariable,   0x78);
ARC_Call(Bios_SetEnvironmentVariable,   0x7c);
ARC_Call(Bios_GetFileInformation,       0x80);
ARC_Call(Bios_SetFileInformation,       0x84);
ARC_Call(Bios_FlushAllCaches,           0x88);
/* note: the followings don't exist on SGI */
#ifdef arc
ARC_Call(Bios_TestUnicodeCharacter,     0x8c);
ARC_Call(Bios_GetDisplayStatus,         0x90);
#endif