mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 10:48:51 +00:00
62a3b7dd08
Fix a number of typos, including:
* "compatble" -> "compatible"
* "eanbeld" -> "enabled"
* "envrionment" -> "environment"
* "FTD" -> "FDT" (for "flattened device tree")
* "ommitted" -> "omitted"
* "overriden" -> "overridden"
* "partiton" -> "partition"
* "propogate" -> "propagate"
* "resourse" -> "resource"
* "rest in piece" -> "rest in peace"
* "suport" -> "support"
* "varible" -> "variable"
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
328 lines
10 KiB
C
328 lines
10 KiB
C
/****************************************************************************
|
|
*
|
|
* Realmode X86 Emulator Library
|
|
*
|
|
* Copyright (C) 1991-2004 SciTech Software, Inc.
|
|
* Copyright (C) David Mosberger-Tang
|
|
* Copyright (C) 1999 Egbert Eich
|
|
*
|
|
* ========================================================================
|
|
*
|
|
* Permission to use, copy, modify, distribute, and sell this software and
|
|
* its documentation for any purpose is hereby granted without fee,
|
|
* provided that the above copyright notice appear in all copies and that
|
|
* both that copyright notice and this permission notice appear in
|
|
* supporting documentation, and that the name of the authors not be used
|
|
* in advertising or publicity pertaining to distribution of the software
|
|
* without specific, written prior permission. The authors makes no
|
|
* representations about the suitability of this software for any purpose.
|
|
* It is provided "as is" without express or implied warranty.
|
|
*
|
|
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
|
|
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
|
|
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|
* PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* ========================================================================
|
|
*
|
|
* Language: ANSI C
|
|
* Environment: Any
|
|
* Developer: Kendall Bennett
|
|
*
|
|
* Description: This file includes subroutines which are related to
|
|
* programmed I/O and memory access. Included in this module
|
|
* are default functions that do nothing. For real uses these
|
|
* functions will have to be overridden by the user library.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include <common.h>
|
|
#include "x86emu/x86emui.h"
|
|
|
|
/*------------------------- Global Variables ------------------------------*/
|
|
|
|
X86EMU_sysEnv _X86EMU_env; /* Global emulator machine state */
|
|
X86EMU_intrFuncs _X86EMU_intrTab[256];
|
|
|
|
int debug_intr;
|
|
|
|
/*----------------------------- Implementation ----------------------------*/
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - Emulator memory address to read
|
|
|
|
RETURNS:
|
|
Byte value read from emulator memory.
|
|
|
|
REMARKS:
|
|
Reads a byte value from the emulator memory.
|
|
****************************************************************************/
|
|
u8 X86API rdb(u32 addr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - Emulator memory address to read
|
|
|
|
RETURNS:
|
|
Word value read from emulator memory.
|
|
|
|
REMARKS:
|
|
Reads a word value from the emulator memory.
|
|
****************************************************************************/
|
|
u16 X86API rdw(u32 addr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - Emulator memory address to read
|
|
|
|
RETURNS:
|
|
Long value read from emulator memory.
|
|
REMARKS:
|
|
Reads a long value from the emulator memory.
|
|
****************************************************************************/
|
|
u32 X86API rdl(u32 addr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - Emulator memory address to read
|
|
val - Value to store
|
|
|
|
REMARKS:
|
|
Writes a byte value to emulator memory.
|
|
****************************************************************************/
|
|
void X86API wrb(u32 addr, u8 val)
|
|
{
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - Emulator memory address to read
|
|
val - Value to store
|
|
|
|
REMARKS:
|
|
Writes a word value to emulator memory.
|
|
****************************************************************************/
|
|
void X86API wrw(u32 addr, u16 val)
|
|
{
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - Emulator memory address to read
|
|
val - Value to store
|
|
|
|
REMARKS:
|
|
Writes a long value to emulator memory.
|
|
****************************************************************************/
|
|
void X86API wrl(u32 addr, u32 val)
|
|
{
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - PIO address to read
|
|
RETURN:
|
|
0
|
|
REMARKS:
|
|
Default PIO byte read function. Doesn't perform real inb.
|
|
****************************************************************************/
|
|
static u8 X86API p_inb(X86EMU_pioAddr addr)
|
|
{
|
|
DB(if (DEBUG_IO_TRACE())
|
|
printk("inb %#04x \n", addr);)
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - PIO address to read
|
|
RETURN:
|
|
0
|
|
REMARKS:
|
|
Default PIO word read function. Doesn't perform real inw.
|
|
****************************************************************************/
|
|
static u16 X86API p_inw(X86EMU_pioAddr addr)
|
|
{
|
|
DB(if (DEBUG_IO_TRACE())
|
|
printk("inw %#04x \n", addr);)
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - PIO address to read
|
|
RETURN:
|
|
0
|
|
REMARKS:
|
|
Default PIO long read function. Doesn't perform real inl.
|
|
****************************************************************************/
|
|
static u32 X86API p_inl(X86EMU_pioAddr addr)
|
|
{
|
|
DB(if (DEBUG_IO_TRACE())
|
|
printk("inl %#04x \n", addr);)
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - PIO address to write
|
|
val - Value to store
|
|
REMARKS:
|
|
Default PIO byte write function. Doesn't perform real outb.
|
|
****************************************************************************/
|
|
static void X86API p_outb(X86EMU_pioAddr addr, u8 val)
|
|
{
|
|
DB(if (DEBUG_IO_TRACE())
|
|
printk("outb %#02x -> %#04x \n", val, addr);)
|
|
return;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - PIO address to write
|
|
val - Value to store
|
|
REMARKS:
|
|
Default PIO word write function. Doesn't perform real outw.
|
|
****************************************************************************/
|
|
static void X86API p_outw(X86EMU_pioAddr addr, u16 val)
|
|
{
|
|
DB(if (DEBUG_IO_TRACE())
|
|
printk("outw %#04x -> %#04x \n", val, addr);)
|
|
return;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
addr - PIO address to write
|
|
val - Value to store
|
|
REMARKS:
|
|
Default PIO ;ong write function. Doesn't perform real outl.
|
|
****************************************************************************/
|
|
static void X86API p_outl(X86EMU_pioAddr addr, u32 val)
|
|
{
|
|
DB(if (DEBUG_IO_TRACE())
|
|
printk("outl %#08x -> %#04x \n", val, addr);)
|
|
return;
|
|
}
|
|
|
|
/*------------------------- Global Variables ------------------------------*/
|
|
|
|
u8(X86APIP sys_rdb) (u32 addr) = rdb;
|
|
u16(X86APIP sys_rdw) (u32 addr) = rdw;
|
|
u32(X86APIP sys_rdl) (u32 addr) = rdl;
|
|
void (X86APIP sys_wrb) (u32 addr, u8 val) = wrb;
|
|
void (X86APIP sys_wrw) (u32 addr, u16 val) = wrw;
|
|
void (X86APIP sys_wrl) (u32 addr, u32 val) = wrl;
|
|
u8(X86APIP sys_inb) (X86EMU_pioAddr addr) = p_inb;
|
|
u16(X86APIP sys_inw) (X86EMU_pioAddr addr) = p_inw;
|
|
u32(X86APIP sys_inl) (X86EMU_pioAddr addr) = p_inl;
|
|
void (X86APIP sys_outb) (X86EMU_pioAddr addr, u8 val) = p_outb;
|
|
void (X86APIP sys_outw) (X86EMU_pioAddr addr, u16 val) = p_outw;
|
|
void (X86APIP sys_outl) (X86EMU_pioAddr addr, u32 val) = p_outl;
|
|
|
|
/*----------------------------- Setup -------------------------------------*/
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
funcs - New memory function pointers to make active
|
|
|
|
REMARKS:
|
|
This function is used to set the pointers to functions which access
|
|
memory space, allowing the user application to override these functions
|
|
and hook them out as necessary for their application.
|
|
****************************************************************************/
|
|
void X86EMU_setupMemFuncs(X86EMU_memFuncs * funcs)
|
|
{
|
|
sys_rdb = funcs->rdb;
|
|
sys_rdw = funcs->rdw;
|
|
sys_rdl = funcs->rdl;
|
|
sys_wrb = funcs->wrb;
|
|
sys_wrw = funcs->wrw;
|
|
sys_wrl = funcs->wrl;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
funcs - New programmed I/O function pointers to make active
|
|
|
|
REMARKS:
|
|
This function is used to set the pointers to functions which access
|
|
I/O space, allowing the user application to override these functions
|
|
and hook them out as necessary for their application.
|
|
****************************************************************************/
|
|
void X86EMU_setupPioFuncs(X86EMU_pioFuncs * funcs)
|
|
{
|
|
sys_inb = funcs->inb;
|
|
sys_inw = funcs->inw;
|
|
sys_inl = funcs->inl;
|
|
sys_outb = funcs->outb;
|
|
sys_outw = funcs->outw;
|
|
sys_outl = funcs->outl;
|
|
}
|
|
|
|
void X86EMU_setupIntrFunc(int intnum, X86EMU_intrFuncs func)
|
|
{
|
|
_X86EMU_intrTab[intnum] = func;
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
funcs - New interrupt vector table to make active
|
|
|
|
REMARKS:
|
|
This function is used to set the pointers to functions which handle
|
|
interrupt processing in the emulator, allowing the user application to
|
|
hook interrupts as necessary for their application. Any interrupts that
|
|
are not hooked by the user application, and reflected and handled internally
|
|
in the emulator via the interrupt vector table. This allows the application
|
|
to get control when the code being emulated executes specific software
|
|
interrupts.
|
|
****************************************************************************/
|
|
void X86EMU_setupIntrFuncs(X86EMU_intrFuncs funcs[])
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 256; i++)
|
|
_X86EMU_intrTab[i] = NULL;
|
|
if (funcs) {
|
|
for (i = 0; i < 256; i++)
|
|
_X86EMU_intrTab[i] = funcs[i];
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
PARAMETERS:
|
|
int - New software interrupt to prepare for
|
|
|
|
REMARKS:
|
|
This function is used to set up the emulator state to exceute a software
|
|
interrupt. This can be used by the user application code to allow an
|
|
interrupt to be hooked, examined and then reflected back to the emulator
|
|
so that the code in the emulator will continue processing the software
|
|
interrupt as per normal. This essentially allows system code to actively
|
|
hook and handle certain software interrupts as necessary.
|
|
****************************************************************************/
|
|
void X86EMU_prepareForInt(int num)
|
|
{
|
|
push_word((u16) M.x86.R_FLG);
|
|
CLEAR_FLAG(F_IF);
|
|
CLEAR_FLAG(F_TF);
|
|
push_word(M.x86.R_CS);
|
|
M.x86.R_CS = mem_access_word(num * 4 + 2);
|
|
push_word(M.x86.R_IP);
|
|
M.x86.R_IP = mem_access_word(num * 4);
|
|
M.x86.intr = 0;
|
|
}
|