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

1 files changed, 373 insertions, 0 deletions

diff --git a/drivers/bios_emulator/biosemu.c b/drivers/bios_emulator/biosemu.c
new file mode 100644
index 0000000..4c3aedf
--- /dev/null
+++ b/drivers/bios_emulator/biosemu.c
@@ -0,0 +1,373 @@
+/****************************************************************************
+*
+*			 BIOS emulator and interface
+*		       to Realmode X86 Emulator Library
+*
+*  Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
+*  Jason Jin <Jason.jin@freescale.com>
+*
+*		Copyright (C) 1996-1999 SciTech Software, Inc.
+*
+*  ========================================================================
+*
+*  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:	Module implementing the system specific functions. This
+*		module is always compiled and linked in the OS depedent
+*		libraries, and never in a binary portable driver.
+*
+*		Jason ported this file to u-boot to run the ATI video card BIOS
+*		in u-boot. Made all the video memory be emulated during the
+*		BIOS runing process which may affect the VGA function but the
+*		frambuffer function can work after run the BIOS.
+*
+****************************************************************************/
+
+#include "biosemui.h"
+#include <malloc.h>
+
+#if defined(CONFIG_BIOSEMU)
+
+BE_sysEnv _BE_env = {{0}};
+static X86EMU_memFuncs _BE_mem __attribute__((section(".got2"))) = {
+	BE_rdb,
+	BE_rdw,
+	BE_rdl,
+	BE_wrb,
+	BE_wrw,
+	BE_wrl,
+	};
+
+static X86EMU_pioFuncs _BE_pio __attribute__((section(".got2"))) = {
+	BE_inb,
+	BE_inw,
+	BE_inl,
+	BE_outb,
+	BE_outw,
+	BE_outl,
+	};
+
+#define OFF(addr)	(u16)(((addr) >> 0) & 0xffff)
+#define SEG(addr)	(u16)(((addr) >> 4) & 0xf000)
+
+/****************************************************************************
+PARAMETERS:
+debugFlags  - Flags to enable debugging options (debug builds only)
+memSize	    - Amount of memory to allocate for real mode machine
+info	    - Pointer to default VGA device information
+
+REMARKS:
+This functions initialises the BElib, and uses the passed in
+BIOS image as the BIOS that is used and emulated at 0xC0000.
+****************************************************************************/
+int X86API BE_init(u32 debugFlags, int memSize, BE_VGAInfo * info, int shared)
+{
+#if !defined(__DRIVER__)  && !defined(__KERNEL__)
+
+	PM_init();
+#endif
+	memset(&M, 0, sizeof(M));
+	if (memSize < 20480){
+		printf("Emulator requires at least 20Kb of memory!\n");
+		return 0;
+	}
+
+	M.mem_base = (unsigned long)malloc(memSize);
+
+	if (M.mem_base == NULL){
+		printf("Biosemu:Out of memory!");
+		return 0;
+	}
+	M.mem_size = memSize;
+
+	_BE_env.emulateVGA = 0;
+	_BE_env.busmem_base = (unsigned long)malloc(128 * 1024);
+	if (_BE_env.busmem_base == NULL){
+		printf("Biosemu:Out of memory!");
+		return 0;
+	}
+	M.x86.debug = debugFlags;
+	_BE_bios_init((u32*)info->LowMem);
+	X86EMU_setupMemFuncs(&_BE_mem);
+	X86EMU_setupPioFuncs(&_BE_pio);
+	BE_setVGA(info);
+	return 1;
+}
+
+/****************************************************************************
+PARAMETERS:
+info	    - Pointer to VGA device information to make current
+
+REMARKS:
+This function sets the VGA BIOS functions in the emulator to point to the
+specific VGA BIOS in use. This includes swapping the BIOS interrupt
+vectors, BIOS image and BIOS data area to the new BIOS. This allows the
+real mode BIOS to be swapped without resetting the entire emulator.
+****************************************************************************/
+void X86API BE_setVGA(BE_VGAInfo * info)
+{
+
+#ifdef __KERNEL__
+	_BE_env.vgaInfo.function = info->function;
+	_BE_env.vgaInfo.device = info->device;
+	_BE_env.vgaInfo.bus = info->bus;
+	_BE_env.vgaInfo.pcidev = info->pcidev;
+#else
+	_BE_env.vgaInfo.pciInfo = info->pciInfo;
+#endif
+	_BE_env.vgaInfo.BIOSImage = info->BIOSImage;
+	if (info->BIOSImage) {
+		_BE_env.biosmem_base = (ulong) info->BIOSImage;
+		_BE_env.biosmem_limit = 0xC0000 + info->BIOSImageLen - 1;
+	} else {
+		_BE_env.biosmem_base = _BE_env.busmem_base + 0x20000;
+		_BE_env.biosmem_limit = 0xC7FFF;
+	}
+	if (*((u32 *) info->LowMem) == 0)
+		_BE_bios_init((u32 *) info->LowMem);
+	memcpy((u8 *) M.mem_base, info->LowMem, sizeof(info->LowMem));
+}
+
+/****************************************************************************
+PARAMETERS:
+info	    - Pointer to VGA device information to retrieve current
+
+REMARKS:
+This function returns the VGA BIOS functions currently active in the
+emulator, so they can be restored at a later date.
+****************************************************************************/
+void X86API BE_getVGA(BE_VGAInfo * info)
+{
+#ifdef __KERNEL__
+	info->function = _BE_env.vgaInfo.function;
+	info->device = _BE_env.vgaInfo.device;
+	info->bus = _BE_env.vgaInfo.bus;
+	info->pcidev = _BE_env.vgaInfo.pcidev;
+#else
+	info->pciInfo = _BE_env.vgaInfo.pciInfo;
+#endif
+	info->BIOSImage = _BE_env.vgaInfo.BIOSImage;
+	memcpy(info->LowMem, (u8 *) M.mem_base, sizeof(info->LowMem));
+}
+
+/****************************************************************************
+PARAMETERS:
+r_seg	- Segment for pointer to convert
+r_off	- Offset for pointer to convert
+
+REMARKS:
+This function maps a real mode pointer in the emulator memory to a protected
+mode pointer that can be used to directly access the memory.
+
+NOTE:	The memory is *always* in little endian format, son on non-x86
+	systems you will need to do endian translations to access this
+	memory.
+****************************************************************************/
+void *X86API BE_mapRealPointer(uint r_seg, uint r_off)
+{
+	u32 addr = ((u32) r_seg << 4) + r_off;
+
+	if (addr >= 0xC0000 && addr <= _BE_env.biosmem_limit) {
+		return (void *)(_BE_env.biosmem_base + addr - 0xC0000);
+	} else if (addr >= 0xA0000 && addr <= 0xFFFFF) {
+		return (void *)(_BE_env.busmem_base + addr - 0xA0000);
+	}
+	return (void *)(M.mem_base + addr);
+}
+
+/****************************************************************************
+PARAMETERS:
+len	- Return the length of the VESA buffer
+rseg	- Place to store VESA buffer segment
+roff	- Place to store VESA buffer offset
+
+REMARKS:
+This function returns the address of the VESA transfer buffer in real
+_BE_piomode emulator memory. The VESA transfer buffer is always 1024 bytes long,
+and located at 15Kb into the start of the real mode memory (16Kb is where
+we put the real mode code we execute for issuing interrupts).
+
+NOTE:	The memory is *always* in little endian format, son on non-x86
+	systems you will need to do endian translations to access this
+	memory.
+****************************************************************************/
+void *X86API BE_getVESABuf(uint * len, uint * rseg, uint * roff)
+{
+	*len = 1024;
+	*rseg = SEG(0x03C00);
+	*roff = OFF(0x03C00);
+	return (void *)(M.mem_base + ((u32) * rseg << 4) + *roff);
+}
+
+/****************************************************************************
+REMARKS:
+Cleans up and exits the emulator.
+****************************************************************************/
+void X86API BE_exit(void)
+{
+	free(M.mem_base);
+	free(_BE_env.busmem_base);
+}
+
+/****************************************************************************
+PARAMETERS:
+seg	- Segment of code to call
+off	- Offset of code to call
+regs	- Real mode registers to load
+sregs	- Real mode segment registers to load
+
+REMARKS:
+This functions calls a real mode far function at the specified address,
+and loads all the x86 registers from the passed in registers structure.
+On exit the registers returned from the call are returned in the same
+structures.
+****************************************************************************/
+void X86API BE_callRealMode(uint seg, uint off, RMREGS * regs, RMSREGS * sregs)
+{
+	M.x86.R_EAX = regs->e.eax;
+	M.x86.R_EBX = regs->e.ebx;
+	M.x86.R_ECX = regs->e.ecx;
+	M.x86.R_EDX = regs->e.edx;
+	M.x86.R_ESI = regs->e.esi;
+	M.x86.R_EDI = regs->e.edi;
+	M.x86.R_DS = sregs->ds;
+	M.x86.R_ES = sregs->es;
+	M.x86.R_FS = sregs->fs;
+	M.x86.R_GS = sregs->gs;
+
+	((u8 *) M.mem_base)[0x4000] = 0x9A;
+	((u8 *) M.mem_base)[0x4001] = (u8) off;
+	((u8 *) M.mem_base)[0x4002] = (u8) (off >> 8);
+	((u8 *) M.mem_base)[0x4003] = (u8) seg;
+	((u8 *) M.mem_base)[0x4004] = (u8) (seg >> 8);
+	((u8 *) M.mem_base)[0x4005] = 0xF1;	/* Illegal op-code */
+	M.x86.R_CS = SEG(0x04000);
+	M.x86.R_IP = OFF(0x04000);
+
+	M.x86.R_SS = SEG(M.mem_size - 2);
+	M.x86.R_SP = OFF(M.mem_size - 2) + 2;
+
+	X86EMU_exec();
+
+	regs->e.cflag = M.x86.R_EFLG & F_CF;
+	regs->e.eax = M.x86.R_EAX;
+	regs->e.ebx = M.x86.R_EBX;
+	regs->e.ecx = M.x86.R_ECX;
+	regs->e.edx = M.x86.R_EDX;
+	regs->e.esi = M.x86.R_ESI;
+	regs->e.edi = M.x86.R_EDI;
+	sregs->ds = M.x86.R_DS;
+	sregs->es = M.x86.R_ES;
+	sregs->fs = M.x86.R_FS;
+	sregs->gs = M.x86.R_GS;
+}
+
+/****************************************************************************
+PARAMETERS:
+intno	- Interrupt number to execute
+in	- Real mode registers to load
+out	- Place to store resulting real mode registers
+
+REMARKS:
+This functions calls a real mode interrupt function at the specified address,
+and loads all the x86 registers from the passed in registers structure.
+On exit the registers returned from the call are returned in out stucture.
+****************************************************************************/
+int X86API BE_int86(int intno, RMREGS * in, RMREGS * out)
+{
+	M.x86.R_EAX = in->e.eax;
+	M.x86.R_EBX = in->e.ebx;
+	M.x86.R_ECX = in->e.ecx;
+	M.x86.R_EDX = in->e.edx;
+	M.x86.R_ESI = in->e.esi;
+	M.x86.R_EDI = in->e.edi;
+	((u8 *) M.mem_base)[0x4000] = 0xCD;
+	((u8 *) M.mem_base)[0x4001] = (u8) intno;
+	((u8 *) M.mem_base)[0x4002] = 0xF1;
+	M.x86.R_CS = SEG(0x04000);
+	M.x86.R_IP = OFF(0x04000);
+
+	M.x86.R_SS = SEG(M.mem_size - 1);
+	M.x86.R_SP = OFF(M.mem_size - 1) - 1;
+
+	X86EMU_exec();
+	out->e.cflag = M.x86.R_EFLG & F_CF;
+	out->e.eax = M.x86.R_EAX;
+	out->e.ebx = M.x86.R_EBX;
+	out->e.ecx = M.x86.R_ECX;
+	out->e.edx = M.x86.R_EDX;
+	out->e.esi = M.x86.R_ESI;
+	out->e.edi = M.x86.R_EDI;
+	return out->x.ax;
+}
+
+/****************************************************************************
+PARAMETERS:
+intno	- Interrupt number to execute
+in	- Real mode registers to load
+out	- Place to store resulting real mode registers
+sregs	- Real mode segment registers to load
+
+REMARKS:
+This functions calls a real mode interrupt function at the specified address,
+and loads all the x86 registers from the passed in registers structure.
+On exit the registers returned from the call are returned in out stucture.
+****************************************************************************/
+int X86API BE_int86x(int intno, RMREGS * in, RMREGS * out, RMSREGS * sregs)
+{
+	M.x86.R_EAX = in->e.eax;
+	M.x86.R_EBX = in->e.ebx;
+	M.x86.R_ECX = in->e.ecx;
+	M.x86.R_EDX = in->e.edx;
+	M.x86.R_ESI = in->e.esi;
+	M.x86.R_EDI = in->e.edi;
+	M.x86.R_DS = sregs->ds;
+	M.x86.R_ES = sregs->es;
+	M.x86.R_FS = sregs->fs;
+	M.x86.R_GS = sregs->gs;
+	((u8 *) M.mem_base)[0x4000] = 0xCD;
+	((u8 *) M.mem_base)[0x4001] = (u8) intno;
+	((u8 *) M.mem_base)[0x4002] = 0xF1;
+	M.x86.R_CS = SEG(0x04000);
+	M.x86.R_IP = OFF(0x04000);
+
+	M.x86.R_SS = SEG(M.mem_size - 1);
+	M.x86.R_SP = OFF(M.mem_size - 1) - 1;
+
+	X86EMU_exec();
+	out->e.cflag = M.x86.R_EFLG & F_CF;
+	out->e.eax = M.x86.R_EAX;
+	out->e.ebx = M.x86.R_EBX;
+	out->e.ecx = M.x86.R_ECX;
+	out->e.edx = M.x86.R_EDX;
+	out->e.esi = M.x86.R_ESI;
+	out->e.edi = M.x86.R_EDI;
+	sregs->ds = M.x86.R_DS;
+	sregs->es = M.x86.R_ES;
+	sregs->fs = M.x86.R_FS;
+	sregs->gs = M.x86.R_GS;
+	return out->x.ax;
+}
+#endif