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/* $NetBSD: start.S,v 1.1 1995/01/18 06:19:01 mellon Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
*/
/*
* start.S -
*
* Contains code that is the first executed at boot time.
*/
#include <machine/regdef.h>
#include <machine/cpu.h>
#include <machine/asm.h>
/*
* Frame required for the debugger (if we have any)
*/
#define START_FRAME ((4 * 4) + 4 + 4)
.globl __start
__start:
.set noreorder
#ifdef __GP_SUPPORT__
la gp, _C_LABEL (_gp)
#endif
la sp, __start - START_FRAME # Stack below program
sw zero, START_FRAME - 4(sp) # Zero out old ra for debugger
sw zero, START_FRAME - 8(sp) # Zero out old fp for debugger
move s0, a0 # save argc
move s1, a1 # save argv
la a0, _C_LABEL (edata) # clear BSS
la a1, _C_LABEL (end)
jal _C_LABEL(bzero) # bzero(edata, end - edata)
subu a1, a1, a0
move a0, s0 # restore argc
jal _C_LABEL(main) # main(argc, argv)
move a1, s1 # restore argv
j _C_LABEL(Bios_Restart) # restart...
nop
/* dummy routine for gcc2 */
.globl _C_LABEL(__main)
_C_LABEL(__main):
j ra
nop
#define Bios_Call(Name,Offset) \
LEAF(Name); \
lw v0,0x80001020; \
lw v0,Offset(v0); \
jr v0 ; \
nop ; \
END(Name)
Bios_Call(Bios_Load, 0x00)
Bios_Call(Bios_Invoke, 0x04)
Bios_Call(Bios_Execute, 0x08)
Bios_Call(Bios_Halt, 0x0c)
Bios_Call(Bios_PowerDown, 0x10)
Bios_Call(Bios_Restart, 0x14)
Bios_Call(Bios_Reboot, 0x18)
Bios_Call(Bios_EnterInteractiveMode, 0x1c)
Bios_Call(Bios_Unused1, 0x20)
Bios_Call(Bios_GetPeer, 0x24)
Bios_Call(Bios_GetChild, 0x28)
Bios_Call(Bios_GetParent, 0x2c)
Bios_Call(Bios_GetConfigurationData, 0x30)
Bios_Call(Bios_AddChild, 0x34)
Bios_Call(Bios_DeleteComponent, 0x38)
Bios_Call(Bios_GetComponent, 0x3c)
Bios_Call(Bios_SaveConfiguration, 0x40)
Bios_Call(Bios_GetSystemId, 0x44)
Bios_Call(Bios_GetMemoryDescriptor, 0x48)
Bios_Call(Bios_Unused2, 0x4c)
Bios_Call(Bios_GetTime, 0x50)
Bios_Call(Bios_GetRelativeTime, 0x54)
Bios_Call(Bios_GetDirectoryEntry, 0x58)
Bios_Call(Bios_Open, 0x5c)
Bios_Call(Bios_Close, 0x60)
Bios_Call(Bios_Read, 0x64)
Bios_Call(Bios_GetReadStatus, 0x68)
Bios_Call(Bios_Write, 0x6c)
Bios_Call(Bios_Seek, 0x70)
Bios_Call(Bios_Mount, 0x74)
Bios_Call(Bios_GetEnvironmentVariable, 0x78)
Bios_Call(Bios_SetEnvironmentVariable, 0x7c)
Bios_Call(Bios_GetFileInformation, 0x80)
Bios_Call(Bios_SetFileInformation, 0x84)
Bios_Call(Bios_FlushAllCaches, 0x88)
Bios_Call(Bios_TestUnicodeCharacter, 0x8c)
Bios_Call(Bios_GetDisplayStatus, 0x90)
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