diff options
author | Stefan Roese <sr@denx.de> | 2007-08-15 21:06:27 +0200 |
---|---|---|
committer | Stefan Roese <sr@denx.de> | 2007-08-15 21:06:27 +0200 |
commit | b706d63559aeec352bc72dd86d7d5423c15f6a60 (patch) | |
tree | fdeda4d61970fef239d9d66ecd851fa46cfe5ec0 /board/MAI/bios_emulator/scitech/src/biosemu/warmboot.c | |
parent | c8603cfbd4573379a6076c9c208545ba2bbf019a (diff) | |
parent | 594e79838ce5078a90d0c27abb2b2d61d5f8e8a7 (diff) | |
download | u-boot-imx-b706d63559aeec352bc72dd86d7d5423c15f6a60.zip u-boot-imx-b706d63559aeec352bc72dd86d7d5423c15f6a60.tar.gz u-boot-imx-b706d63559aeec352bc72dd86d7d5423c15f6a60.tar.bz2 |
Merge with git://www.denx.de/git/u-boot.git
Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/biosemu/warmboot.c')
-rw-r--r-- | board/MAI/bios_emulator/scitech/src/biosemu/warmboot.c | 569 |
1 files changed, 0 insertions, 569 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/biosemu/warmboot.c b/board/MAI/bios_emulator/scitech/src/biosemu/warmboot.c deleted file mode 100644 index 98d5fb8..0000000 --- a/board/MAI/bios_emulator/scitech/src/biosemu/warmboot.c +++ /dev/null @@ -1,569 +0,0 @@ -/**************************************************************************** -* -* BIOS emulator and interface -* to Realmode X86 Emulator Library -* -* 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 to implement warm booting of all PCI/AGP controllers -* on the bus. We use the x86 real mode emulator to run the -* BIOS on the primary and secondary controllers to bring -* the cards up. -* -****************************************************************************/ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <stdarg.h> -#include "biosemu.h" -#ifndef _MAX_PATH -#define _MAX_PATH 256 -#endif - -/*------------------------- Global Variables ------------------------------*/ - -static PCIDeviceInfo PCI[MAX_PCI_DEVICES]; -static int NumPCI = -1; -static int BridgeIndex[MAX_PCI_DEVICES] = {0}; -static int NumBridges; -static PCIBridgeInfo *AGPBridge = NULL; -static int DeviceIndex[MAX_PCI_DEVICES] = {0}; -static int NumDevices; -static u32 debugFlags = 0; -static BE_VGAInfo VGAInfo[MAX_PCI_DEVICES] = {{0}}; -static ibool useV86 = false; -static ibool forcePost = false; - -/* Length of the BIOS image */ - -#define MAX_BIOSLEN (64 * 1024L) -#define FINAL_BIOSLEN (32 * 1024L) - -/* Macro to determine if the VGA is enabled and responding */ - -#define VGA_NOT_ACTIVE() (forcePost || (PM_inpb(0x3CC) == 0xFF) || ((PM_inpb(0x3CC) & 0x2) == 0)) - -#define ENABLE_DEVICE(device) \ - PCI_writePCIRegB(0x4,PCI[DeviceIndex[device]].Command | 0x7,device) - -#define DISABLE_DEVICE(device) \ - PCI_writePCIRegB(0x4,0,device) - -/* Macros to enable and disable AGP VGA resources */ - -#define ENABLE_AGP_VGA() \ - PCI_accessReg(0x3E,AGPBridge->BridgeControl | 0x8,PCI_WRITE_WORD,(PCIDeviceInfo*)AGPBridge) - -#define DISABLE_AGP_VGA() \ - PCI_accessReg(0x3E,AGPBridge->BridgeControl & ~0x8,PCI_WRITE_WORD,(PCIDeviceInfo*)AGPBridge) - -#define RESTORE_AGP_VGA() \ - PCI_accessReg(0x3E,AGPBridge->BridgeControl,PCI_WRITE_WORD,(PCIDeviceInfo*)AGPBridge) - -/*-------------------------- Implementation -------------------------------*/ - -/**************************************************************************** -RETURNS: -The address to use to map the secondary BIOS (PCI/AGP devices) - -REMARKS: -Searches all the PCI base address registers for the device looking for a -memory mapping that is large enough to hold our ROM BIOS. We usually end up -finding the framebuffer mapping (usually BAR 0x10), and we use this mapping -to map the BIOS for the device into. We use a mapping that is already -assigned to the device to ensure the memory range will be passed through -by any PCI->PCI or AGP->PCI bridge that may be present. - -NOTE: Usually this function is only used for AGP devices, but it may be - used for PCI devices that have already been POST'ed and the BIOS - ROM base address has been zero'ed out. -****************************************************************************/ -static ulong PCI_findBIOSAddr( - int device) -{ - ulong base,size; - int bar; - - for (bar = 0x10; bar <= 0x14; bar++) { - base = PCI_readPCIRegL(bar,device) & ~0xFF; - if (!(base & 0x1)) { - PCI_writePCIRegL(bar,0xFFFFFFFF,device); - size = PCI_readPCIRegL(bar,device) & ~0xFF; - size = ~size+1; - PCI_writePCIRegL(bar,0,device); - if (size >= MAX_BIOSLEN) - return base; - } - } - return 0; -} - -/**************************************************************************** -REMARKS: -Re-writes the PCI base address registers for the secondary PCI controller -with the values from our initial PCI bus enumeration. This fixes up the -values after we have POST'ed the secondary display controller BIOS, which -may have incorrectly re-programmed the base registers the same as the -primary display controller (the case for identical S3 cards). -****************************************************************************/ -static void _PCI_fixupSecondaryBARs(void) -{ - int i; - - for (i = 0; i < NumDevices; i++) { - PCI_writePCIRegL(0x10,PCI[DeviceIndex[i]].BaseAddress10,i); - PCI_writePCIRegL(0x14,PCI[DeviceIndex[i]].BaseAddress14,i); - PCI_writePCIRegL(0x18,PCI[DeviceIndex[i]].BaseAddress18,i); - PCI_writePCIRegL(0x1C,PCI[DeviceIndex[i]].BaseAddress1C,i); - PCI_writePCIRegL(0x20,PCI[DeviceIndex[i]].BaseAddress20,i); - PCI_writePCIRegL(0x24,PCI[DeviceIndex[i]].BaseAddress24,i); - } -} - -/**************************************************************************** -RETURNS: -True if successfully initialised, false if not. - -REMARKS: -This function executes the BIOS POST code on the controller. We assume that -at this stage the controller has its I/O and memory space enabled and -that all other controllers are in a disabled state. -****************************************************************************/ -static void PCI_doBIOSPOST( - int device, - ulong BIOSPhysAddr, - void *mappedBIOS, - ulong BIOSLen) -{ - RMREGS regs; - RMSREGS sregs; - - /* Determine the value to store in AX for BIOS POST */ - regs.x.ax = (u16)(PCI[DeviceIndex[device]].slot.i >> 8); - if (useV86) { - /* Post the BIOS using the PM functions (ie: v86 mode on Linux) */ - if (!PM_doBIOSPOST(regs.x.ax,BIOSPhysAddr,mappedBIOS,BIOSLen)) { - /* If the PM function fails, this probably means are we are on */ - /* DOS and can't re-map the real mode 0xC0000 region. In thise */ - /* case if the device is the primary, we can use the real */ - /* BIOS at 0xC0000 directly. */ - if (device == 0) - PM_doBIOSPOST(regs.x.ax,0xC0000,mappedBIOS,BIOSLen); - } - } - else { - /* Setup the X86 emulator for the VGA BIOS */ - BE_setVGA(&VGAInfo[device]); - - /* Execute the BIOS POST code */ - BE_callRealMode(0xC000,0x0003,®s,&sregs); - - /* Cleanup and exit */ - BE_getVGA(&VGAInfo[device]); - } -} - -/**************************************************************************** -RETURNS: -True if successfully initialised, false if not. - -REMARKS: -Loads and POST's the secondary controllers BIOS, directly from the BIOS -image we can extract over the PCI bus. -****************************************************************************/ -static ibool PCI_postControllers(void) -{ - int device; - ulong BIOSImageLen,mappedBIOSPhys; - uchar *mappedBIOS,*copyOfBIOS; - char filename[_MAX_PATH]; - FILE *f; - - /* Disable the primary display controller and AGP VGA pass-through */ - DISABLE_DEVICE(0); - if (AGPBridge) - DISABLE_AGP_VGA(); - - /* Now POST all the secondary controllers */ - for (device = 0; device < NumDevices; device++) { - /* Skip the device if it is not enabled (probably an ISA device) */ - if (DeviceIndex[device] == -1) - continue; - - /* Enable secondary display controller. If the secondary controller */ - /* is on the AGP bus, then enable VGA resources for the AGP device. */ - ENABLE_DEVICE(device); - if (AGPBridge && AGPBridge->SecondayBusNumber == PCI[DeviceIndex[device]].slot.p.Bus) - ENABLE_AGP_VGA(); - - /* Check if the controller has already been POST'ed */ - if (VGA_NOT_ACTIVE()) { - /* Find a viable place to map the secondary PCI BIOS image and map it */ - printk("Device %d not enabled, so attempting warm boot it\n", device); - - /* For AGP devices (and PCI devices that do have the ROM base */ - /* address zero'ed out) we have to map the BIOS to a location */ - /* that is passed by the AGP bridge to the bus. Some AGP devices */ - /* have the ROM base address already set up for us, and some */ - /* do not (we map to one of the existing BAR locations in */ - /* this case). */ - mappedBIOS = NULL; - if (PCI[DeviceIndex[device]].ROMBaseAddress != 0) - mappedBIOSPhys = PCI[DeviceIndex[device]].ROMBaseAddress & ~0xF; - else - mappedBIOSPhys = PCI_findBIOSAddr(device); - printk("Mapping BIOS image to 0x%08X\n", mappedBIOSPhys); - mappedBIOS = PM_mapPhysicalAddr(mappedBIOSPhys,MAX_BIOSLEN-1,false); - PCI_writePCIRegL(0x30,mappedBIOSPhys | 0x1,device); - BIOSImageLen = mappedBIOS[2] * 512; - if ((copyOfBIOS = malloc(BIOSImageLen)) == NULL) - return false; - memcpy(copyOfBIOS,mappedBIOS,BIOSImageLen); - PM_freePhysicalAddr(mappedBIOS,MAX_BIOSLEN-1); - - /* Allocate memory to store copy of BIOS from secondary controllers */ - VGAInfo[device].pciInfo = &PCI[DeviceIndex[device]]; - VGAInfo[device].BIOSImage = copyOfBIOS; - VGAInfo[device].BIOSImageLen = BIOSImageLen; - - /* Restore device mappings */ - PCI_writePCIRegL(0x30,PCI[DeviceIndex[device]].ROMBaseAddress,device); - PCI_writePCIRegL(0x10,PCI[DeviceIndex[device]].BaseAddress10,device); - PCI_writePCIRegL(0x14,PCI[DeviceIndex[device]].BaseAddress14,device); - - /* Now execute the BIOS POST for the device */ - if (copyOfBIOS[0] == 0x55 && copyOfBIOS[1] == 0xAA) { - printk("Executing BIOS POST for controller.\n"); - PCI_doBIOSPOST(device,mappedBIOSPhys,copyOfBIOS,BIOSImageLen); - } - - /* Reset the size of the BIOS image to the final size */ - VGAInfo[device].BIOSImageLen = FINAL_BIOSLEN; - - /* Save the BIOS and interrupt vector information to disk */ - sprintf(filename,"%s/bios.%02d",PM_getNucleusConfigPath(),device); - if ((f = fopen(filename,"wb")) != NULL) { - fwrite(copyOfBIOS,1,FINAL_BIOSLEN,f); - fwrite(VGAInfo[device].LowMem,1,sizeof(VGAInfo[device].LowMem),f); - fclose(f); - } - } - else { - /* Allocate memory to store copy of BIOS from secondary controllers */ - if ((copyOfBIOS = malloc(FINAL_BIOSLEN)) == NULL) - return false; - VGAInfo[device].pciInfo = &PCI[DeviceIndex[device]]; - VGAInfo[device].BIOSImage = copyOfBIOS; - VGAInfo[device].BIOSImageLen = FINAL_BIOSLEN; - - /* Load the BIOS and interrupt vector information from disk */ - sprintf(filename,"%s/bios.%02d",PM_getNucleusConfigPath(),device); - if ((f = fopen(filename,"rb")) != NULL) { - fread(copyOfBIOS,1,FINAL_BIOSLEN,f); - fread(VGAInfo[device].LowMem,1,sizeof(VGAInfo[device].LowMem),f); - fclose(f); - } - } - - /* Fix up all the secondary PCI base address registers */ - /* (restores them all from the values we read previously) */ - _PCI_fixupSecondaryBARs(); - - /* Disable the secondary controller and AGP VGA pass-through */ - DISABLE_DEVICE(device); - if (AGPBridge) - DISABLE_AGP_VGA(); - } - - /* Reenable primary display controller and reset AGP bridge control */ - if (AGPBridge) - RESTORE_AGP_VGA(); - ENABLE_DEVICE(0); - - /* Free physical BIOS image mapping */ - PM_freePhysicalAddr(mappedBIOS,MAX_BIOSLEN-1); - - /* Restore the X86 emulator BIOS info to primary controller */ - if (!useV86) - BE_setVGA(&VGAInfo[0]); - return true; -} - -/**************************************************************************** -REMARKS: -Enumerates the PCI bus and dumps the PCI configuration information to the -log file. -****************************************************************************/ -static void EnumeratePCI(void) -{ - int i,index; - PCIBridgeInfo *info; - - printk("Displaying enumeration of PCI bus (%d devices, %d display devices)\n", - NumPCI, NumDevices); - for (index = 0; index < NumDevices; index++) - printk(" Display device %d is PCI device %d\n",index,DeviceIndex[index]); - printk("\n"); - printk("Bus Slot Fnc DeviceID SubSystem Rev Class IRQ Int Cmd\n"); - for (i = 0; i < NumPCI; i++) { - printk("%2d %2d %2d %04X:%04X %04X:%04X %02X %02X:%02X %02X %02X %04X ", - PCI[i].slot.p.Bus, - PCI[i].slot.p.Device, - PCI[i].slot.p.Function, - PCI[i].VendorID, - PCI[i].DeviceID, - PCI[i].SubSystemVendorID, - PCI[i].SubSystemID, - PCI[i].RevID, - PCI[i].BaseClass, - PCI[i].SubClass, - PCI[i].InterruptLine, - PCI[i].InterruptPin, - PCI[i].Command); - for (index = 0; index < NumDevices; index++) { - if (DeviceIndex[index] == i) - break; - } - if (index < NumDevices) - printk("<- %d\n", index); - else - printk("\n"); - } - printk("\n"); - printk("DeviceID Stat Ifc Cch Lat Hdr BIST\n"); - for (i = 0; i < NumPCI; i++) { - printk("%04X:%04X %04X %02X %02X %02X %02X %02X ", - PCI[i].VendorID, - PCI[i].DeviceID, - PCI[i].Status, - PCI[i].Interface, - PCI[i].CacheLineSize, - PCI[i].LatencyTimer, - PCI[i].HeaderType, - PCI[i].BIST); - for (index = 0; index < NumDevices; index++) { - if (DeviceIndex[index] == i) - break; - } - if (index < NumDevices) - printk("<- %d\n", index); - else - printk("\n"); - } - printk("\n"); - printk("DeviceID Base10h Base14h Base18h Base1Ch Base20h Base24h ROMBase\n"); - for (i = 0; i < NumPCI; i++) { - printk("%04X:%04X %08X %08X %08X %08X %08X %08X %08X ", - PCI[i].VendorID, - PCI[i].DeviceID, - PCI[i].BaseAddress10, - PCI[i].BaseAddress14, - PCI[i].BaseAddress18, - PCI[i].BaseAddress1C, - PCI[i].BaseAddress20, - PCI[i].BaseAddress24, - PCI[i].ROMBaseAddress); - for (index = 0; index < NumDevices; index++) { - if (DeviceIndex[index] == i) - break; - } - if (index < NumDevices) - printk("<- %d\n", index); - else - printk("\n"); - } - printk("\n"); - printk("DeviceID BAR10Len BAR14Len BAR18Len BAR1CLen BAR20Len BAR24Len ROMLen\n"); - for (i = 0; i < NumPCI; i++) { - printk("%04X:%04X %08X %08X %08X %08X %08X %08X %08X ", - PCI[i].VendorID, - PCI[i].DeviceID, - PCI[i].BaseAddress10Len, - PCI[i].BaseAddress14Len, - PCI[i].BaseAddress18Len, - PCI[i].BaseAddress1CLen, - PCI[i].BaseAddress20Len, - PCI[i].BaseAddress24Len, - PCI[i].ROMBaseAddressLen); - for (index = 0; index < NumDevices; index++) { - if (DeviceIndex[index] == i) - break; - } - if (index < NumDevices) - printk("<- %d\n", index); - else - printk("\n"); - } - printk("\n"); - printk("Displaying enumeration of %d bridge devices\n",NumBridges); - printk("\n"); - printk("DeviceID P# S# B# IOB IOL MemBase MemLimit PreBase PreLimit Ctrl\n"); - for (i = 0; i < NumBridges; i++) { - info = (PCIBridgeInfo*)&PCI[BridgeIndex[i]]; - printk("%04X:%04X %02X %02X %02X %04X %04X %08X %08X %08X %08X %04X\n", - info->VendorID, - info->DeviceID, - info->PrimaryBusNumber, - info->SecondayBusNumber, - info->SubordinateBusNumber, - ((u16)info->IOBase << 8) & 0xF000, - info->IOLimit ? - ((u16)info->IOLimit << 8) | 0xFFF : 0, - ((u32)info->MemoryBase << 16) & 0xFFF00000, - info->MemoryLimit ? - ((u32)info->MemoryLimit << 16) | 0xFFFFF : 0, - ((u32)info->PrefetchableMemoryBase << 16) & 0xFFF00000, - info->PrefetchableMemoryLimit ? - ((u32)info->PrefetchableMemoryLimit << 16) | 0xFFFFF : 0, - info->BridgeControl); - } - printk("\n"); -} - -/**************************************************************************** -RETURNS: -Number of display devices found. - -REMARKS: -This function enumerates the number of available display devices on the -PCI bus, and returns the number found. -****************************************************************************/ -static int PCI_enumerateDevices(void) -{ - int i,j; - PCIBridgeInfo *info; - - /* If this is the first time we have been called, enumerate all */ - /* devices on the PCI bus. */ - if (NumPCI == -1) { - for (i = 0; i < MAX_PCI_DEVICES; i++) - PCI[i].dwSize = sizeof(PCI[i]); - if ((NumPCI = PCI_enumerate(PCI,MAX_PCI_DEVICES)) == 0) - return -1; - - /* Build a list of all PCI bridge devices */ - for (i = 0,NumBridges = 0,BridgeIndex[0] = -1; i < NumPCI; i++) { - if (PCI[i].BaseClass == PCI_BRIDGE_CLASS) { - if (NumBridges < MAX_PCI_DEVICES) - BridgeIndex[NumBridges++] = i; - } - } - - /* Now build a list of all display class devices */ - for (i = 0,NumDevices = 1,DeviceIndex[0] = -1; i < NumPCI; i++) { - if (PCI_IS_DISPLAY_CLASS(&PCI[i])) { - if ((PCI[i].Command & 0x3) == 0x3) { - DeviceIndex[0] = i; - } - else { - if (NumDevices < MAX_PCI_DEVICES) - DeviceIndex[NumDevices++] = i; - } - if (PCI[i].slot.p.Bus != 0) { - /* This device is on a different bus than the primary */ - /* PCI bus, so it is probably an AGP device. Find the */ - /* AGP bus device that controls that bus so we can */ - /* control it. */ - for (j = 0; j < NumBridges; j++) { - info = (PCIBridgeInfo*)&PCI[BridgeIndex[j]]; - if (info->SecondayBusNumber == PCI[i].slot.p.Bus) { - AGPBridge = info; - break; - } - } - } - } - } - - /* Enumerate all PCI and bridge devices to log file */ - EnumeratePCI(); - } - return NumDevices; -} - -FILE *logfile; - -void printk(const char *fmt, ...) -{ - va_list argptr; - va_start(argptr, fmt); - vfprintf(logfile, fmt, argptr); - fflush(logfile); - va_end(argptr); -} - -int main(int argc,char *argv[]) -{ - while (argc > 1) { - if (stricmp(argv[1],"-usev86") == 0) { - useV86 = true; - } - else if (stricmp(argv[1],"-force") == 0) { - forcePost = true; - } -#ifdef DEBUG - else if (stricmp(argv[1],"-decode") == 0) { - debugFlags |= DEBUG_DECODE_F; - } - else if (stricmp(argv[1],"-iotrace") == 0) { - debugFlags |= DEBUG_IO_TRACE_F; - } -#endif - else { - printf("Usage: warmboot [-usev86] [-force] [-decode] [-iotrace]\n"); - exit(-1); - } - argc--; - argv++; - } - if ((logfile = fopen("warmboot.log","w")) == NULL) - exit(1); - - PM_init(); - if (!useV86) { - /* Initialise the x86 BIOS emulator */ - BE_init(false,debugFlags,65536,&VGAInfo[0]); - } - - /* Enumerate all devices (which POST's them at the same time) */ - if (PCI_enumerateDevices() < 1) { - printk("No PCI display devices found!\n"); - return -1; - } - - /* Post all the display controller BIOS'es */ - PCI_postControllers(); - - /* Cleanup and exit the emulator */ - if (!useV86) - BE_exit(); - fclose(logfile); - return 0; -} |