Merge with git://www.denx.de/git/u-boot.git

1 files changed, 326 insertions, 0 deletions

diff --git a/drivers/bios_emulator/x86emu/sys.c b/drivers/bios_emulator/x86emu/sys.c
new file mode 100644
index 000000000..566389f58
--- /dev/null
+++ b/drivers/bios_emulator/x86emu/sys.c
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+/****************************************************************************
+*
+*                       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 overriden by the user library.
+*
+****************************************************************************/
+
+#include "x86emu/x86emui.h"
+
+#if defined(CONFIG_BIOSEMU)
+
+/*------------------------- 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;
+}
+
+/****************************************************************************
+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;
+}
+
+#endif