--- /dev/null
+/****************************************************************************
+*
+* BIOS emulator and interface
+* to Realmode X86 Emulator Library
+*
+* Copyright (C) 2007 Freescale Semiconductor, Inc.
+* 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 <malloc.h>
+#include <common.h>
+#include "biosemui.h"
+
+BE_sysEnv _BE_env = {{0}};
+static X86EMU_memFuncs _BE_mem __attribute__((section(GOT2_TYPE))) = {
+ BE_rdb,
+ BE_rdw,
+ BE_rdl,
+ BE_wrb,
+ BE_wrw,
+ BE_wrl,
+ };
+
+static X86EMU_pioFuncs _BE_pio __attribute__((section(GOT2_TYPE))) = {
+ 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 = 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 ((void *)_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 ((info->LowMem[0] == 0) && (info->LowMem[1] == 0) &&
+ (info->LowMem[2] == 0) && (info->LowMem[3] == 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((void *)_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;
+}
Code Review / kvmfornfv.git / blobdiff