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Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/common/pcilib.c')
| -rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/common/pcilib.c | 747 |
1 files changed, 0 insertions, 747 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/common/pcilib.c b/board/MAI/bios_emulator/scitech/src/pm/common/pcilib.c deleted file mode 100644 index 1d542fc5df..0000000000 --- a/board/MAI/bios_emulator/scitech/src/pm/common/pcilib.c +++ /dev/null @@ -1,747 +0,0 @@ -/**************************************************************************** -* -* SciTech OS Portability Manager Library -* -* ======================================================================== -* -* The contents of this file are subject to the SciTech MGL Public -* License Version 1.0 (the "License"); you may not use this file -* except in compliance with the License. You may obtain a copy of -* the License at http://www.scitechsoft.com/mgl-license.txt -* -* Software distributed under the License is distributed on an -* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or -* implied. See the License for the specific language governing -* rights and limitations under the License. -* -* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc. -* -* The Initial Developer of the Original Code is SciTech Software, Inc. -* All Rights Reserved. -* -* ======================================================================== -* -* Language: ANSI C -* Environment: Any -* -* Description: Module for interfacing to the PCI bus and configuration -* space registers. -* -****************************************************************************/ - -#include "pmapi.h" -#include "pcilib.h" -#if !defined(__WIN32_VXD__) && !defined(__NT_DRIVER__) -#include <string.h> -#endif - -/*---------------------- Macros and type definitions ----------------------*/ - -#pragma pack(1) - -/* Length of the memory mapping for the PCI BIOS */ - -#define BIOS_LIMIT (128 * 1024L - 1) - -/* Macros for accessing the PCI BIOS functions from 32-bit protected mode */ - -#define BIOS32_SIGNATURE (((ulong)'_' << 0) + ((ulong)'3' << 8) + ((ulong)'2' << 16) + ((ulong)'_' << 24)) -#define PCI_SIGNATURE (((ulong)'P' << 0) + ((ulong)'C' << 8) + ((ulong)'I' << 16) + ((ulong)' ' << 24)) -#define PCI_SERVICE (((ulong)'$' << 0) + ((ulong)'P' << 8) + ((ulong)'C' << 16) + ((ulong)'I' << 24)) -#define PCI_BIOS_PRESENT 0xB101 -#define FIND_PCI_DEVICE 0xB102 -#define FIND_PCI_CLASS 0xB103 -#define GENERATE_SPECIAL 0xB106 -#define READ_CONFIG_BYTE 0xB108 -#define READ_CONFIG_WORD 0xB109 -#define READ_CONFIG_DWORD 0xB10A -#define WRITE_CONFIG_BYTE 0xB10B -#define WRITE_CONFIG_WORD 0xB10C -#define WRITE_CONFIG_DWORD 0xB10D -#define GET_IRQ_ROUTING_OPT 0xB10E -#define SET_PCI_IRQ 0xB10F - -/* This is the standard structure used to identify the entry point to the - * BIOS32 Service Directory, as documented in PCI 2.1 BIOS Specicition. - */ - -typedef union { - struct { - ulong signature; /* _32_ */ - ulong entry; /* 32 bit physical address */ - uchar revision; /* Revision level, 0 */ - uchar length; /* Length in paragraphs should be 01 */ - uchar checksum; /* All bytes must add up to zero */ - uchar reserved[5]; /* Must be zero */ - } fields; - char chars[16]; - } PCI_bios32; - -/* Structure for a far pointer to call the PCI BIOS services with */ - -typedef struct { - ulong address; - ushort segment; - } PCIBIOS_entry; - -/* Macros to copy a structure that includes dwSize members */ - -#define COPY_STRUCTURE(d,s) memcpy(d,s,MIN((s)->dwSize,(d)->dwSize)) - -#pragma pack() - -/*--------------------------- Global variables ----------------------------*/ - -static uchar *BIOSImage = NULL; /* BIOS image mapping */ -static int PCIBIOSVersion = -1;/* PCI BIOS version */ -static PCIBIOS_entry PCIEntry; /* PCI services entry point */ -static ulong PCIPhysEntry = 0; /* Physical address */ - -/*----------------------------- Implementation ----------------------------*/ - -/* External assembler helper functions */ - -uchar _ASMAPI _BIOS32_service(ulong service,ulong function,ulong *physBase,ulong *length,ulong *serviceOffset,PCIBIOS_entry entry); -ushort _ASMAPI _PCIBIOS_isPresent(ulong i_eax,ulong *o_edx,ushort *o_ax,uchar *o_cl,PCIBIOS_entry entry); -ulong _ASMAPI _PCIBIOS_service(ulong r_eax,ulong r_ebx,ulong r_edi,ulong r_ecx,PCIBIOS_entry entry); -int _ASMAPI _PCIBIOS_getRouting(PCIRoutingOptionsBuffer *buf,PCIBIOS_entry entry); -ibool _ASMAPI _PCIBIOS_setIRQ(int busDev,int intPin,int IRQ,PCIBIOS_entry entry); -ulong _ASMAPI _PCIBIOS_specialCycle(int bus,ulong data,PCIBIOS_entry entry); -ushort _ASMAPI _PCI_getCS(void); - -/**************************************************************************** -REMARKS: -This functions returns the physical address of the PCI BIOS entry point. -****************************************************************************/ -ulong _ASMAPI PCIBIOS_getEntry(void) -{ return PCIPhysEntry; } - -/**************************************************************************** -PARAMETERS: -hwType - Place to store the PCI hardware access mechanism flags -lastBus - Place to store the index of the last PCI bus in the system - -RETURNS: -Version number of the PCI BIOS found. - -REMARKS: -This function determines if the PCI BIOS is present in the system, and if -so returns the information returned by the PCI BIOS detect function. -****************************************************************************/ -static int PCIBIOS_detect( - uchar *hwType, - uchar *lastBus) -{ - ulong signature; - ushort stat,version; - -#ifndef __16BIT__ - PCIBIOS_entry BIOSEntry = {0}; - uchar *BIOSEnd; - PCI_bios32 *BIOSDir; - ulong physBase,length,offset; - - /* Bail if we have already detected no BIOS is present */ - if (PCIBIOSVersion == 0) - return 0; - - /* First scan the memory from 0xE0000 to 0xFFFFF looking for the - * BIOS32 service directory, so we can determine if we can call it - * from 32-bit protected mode. - */ - if (PCIBIOSVersion == -1) { - PCIBIOSVersion = 0; - BIOSImage = PM_mapPhysicalAddr(0xE0000,BIOS_LIMIT,false); - if (!BIOSImage) - return 0; - BIOSEnd = BIOSImage + 0x20000; - for (BIOSDir = (PCI_bios32*)BIOSImage; BIOSDir < (PCI_bios32*)BIOSEnd; BIOSDir++) { - uchar sum; - int i,length; - - if (BIOSDir->fields.signature != BIOS32_SIGNATURE) - continue; - length = BIOSDir->fields.length * 16; - if (!length) - continue; - for (sum = i = 0; i < length ; i++) - sum += BIOSDir->chars[i]; - if (sum != 0) - continue; - BIOSEntry.address = (ulong)BIOSImage + (BIOSDir->fields.entry - 0xE0000); - BIOSEntry.segment = _PCI_getCS(); - break; - } - - /* If we found the BIOS32 directory, call it to get the address of the - * PCI services. - */ - if (BIOSEntry.address == 0) - return 0; - if (_BIOS32_service(PCI_SERVICE,0,&physBase,&length,&offset,BIOSEntry) != 0) - return 0; - PCIPhysEntry = physBase + offset; - PCIEntry.address = (ulong)BIOSImage + (PCIPhysEntry - 0xE0000); - PCIEntry.segment = _PCI_getCS(); - } -#endif - /* We found the BIOS entry, so now do the version check */ - version = _PCIBIOS_isPresent(PCI_BIOS_PRESENT,&signature,&stat,lastBus,PCIEntry); - if (version > 0 && ((stat >> 8) == 0) && signature == PCI_SIGNATURE) { - *hwType = stat & 0xFF; - return PCIBIOSVersion = version; - } - return 0; -} - -/**************************************************************************** -PARAMETERS: -info - Array of PCIDeviceInfo structures to check against -index - Index of the current device to check - -RETURNS: -True if the device is a duplicate, false if not. - -REMARKS: -This function goes through the list of all devices preceeding the newly -found device in the info structure, and checks that the device is not a -duplicate of a previous device. Some devices incorrectly enumerate -themselves at different function addresses so we check here to exclude -those cases. -****************************************************************************/ -static ibool CheckDuplicate( - PCIDeviceInfo *info, - PCIDeviceInfo *prev) -{ - /* Ignore devices with a vendor ID of 0 */ - if (info->VendorID == 0) - return true; - - /* NOTE: We only check against the current device on - * the bus to ensure that we do not exclude - * multiple controllers of the same device ID. - */ - if (info->slot.p.Bus == prev->slot.p.Bus && - info->slot.p.Device == prev->slot.p.Device && - info->DeviceID == prev->DeviceID) - return true; - return false; -} - -/**************************************************************************** -PARAMETERS: -info - Array of PCIDeviceInfo structures to fill in -maxDevices - Maximum number of of devices to enumerate into array - -RETURNS: -Number of PCI devices found and enumerated on the PCI bus, 0 if not PCI. - -REMARKS: -Function to enumerate all available devices on the PCI bus into an array -of configuration information blocks. -****************************************************************************/ -static int PCI_enumerateMech1( - PCIDeviceInfo info[]) -{ - int bus,device,function,i,numFound = 0; - ulong *lp,tmp; - PCIslot slot = {{0,0,0,0,0,0,1}}; - PCIDeviceInfo pci,prev = {0}; - - /* Try PCI access mechanism 1 */ - PM_outpb(0xCFB,0x01); - tmp = PM_inpd(0xCF8); - PM_outpd(0xCF8,slot.i); - if ((PM_inpd(0xCF8) == slot.i) && (PM_inpd(0xCFC) != 0xFFFFFFFFUL)) { - /* PCI access mechanism 1 - the preferred mechanism */ - for (bus = 0; bus < 8; bus++) { - slot.p.Bus = bus; - for (device = 0; device < 32; device++) { - slot.p.Device = device; - for (function = 0; function < 8; function++) { - slot.p.Function = function; - slot.p.Register = 0; - PM_outpd(0xCF8,slot.i); - if (PM_inpd(0xCFC) != 0xFFFFFFFFUL) { - memset(&pci,0,sizeof(pci)); - pci.dwSize = sizeof(pci); - pci.mech1 = 1; - pci.slot = slot; - lp = (ulong*)&(pci.VendorID); - for (i = 0; i < NUM_PCI_REG; i++, lp++) { - slot.p.Register = i; - PM_outpd(0xCF8,slot.i); - *lp = PM_inpd(0xCFC); - } - if (!CheckDuplicate(&pci,&prev)) { - if (info) - COPY_STRUCTURE(&info[numFound],&pci); - ++numFound; - } - prev = pci; - } - } - } - } - - /* Disable PCI config cycle on exit */ - PM_outpd(0xCF8,0); - return numFound; - } - PM_outpd(0xCF8,tmp); - - /* No hardware access mechanism 1 found */ - return 0; -} - -/**************************************************************************** -PARAMETERS: -info - Array of PCIDeviceInfo structures to fill in -maxDevices - Maximum number of of devices to enumerate into array - -RETURNS: -Number of PCI devices found and enumerated on the PCI bus, 0 if not PCI. - -REMARKS: -Function to enumerate all available devices on the PCI bus into an array -of configuration information blocks. -****************************************************************************/ -static int PCI_enumerateMech2( - PCIDeviceInfo info[]) -{ - int bus,device,function,i,numFound = 0; - ushort deviceIO; - ulong *lp; - PCIslot slot = {{0,0,0,0,0,0,1}}; - PCIDeviceInfo pci,prev = {0}; - - /* Try PCI access mechanism 2 */ - PM_outpb(0xCFB,0x00); - PM_outpb(0xCF8,0x00); - PM_outpb(0xCFA,0x00); - if (PM_inpb(0xCF8) == 0x00 && PM_inpb(0xCFB) == 0x00) { - /* PCI access mechanism 2 - the older mechanism for legacy busses */ - for (bus = 0; bus < 2; bus++) { - slot.p.Bus = bus; - PM_outpb(0xCFA,(uchar)bus); - for (device = 0; device < 16; device++) { - slot.p.Device = device; - deviceIO = 0xC000 + (device << 8); - for (function = 0; function < 8; function++) { - slot.p.Function = function; - slot.p.Register = 0; - PM_outpb(0xCF8,(uchar)((function << 1) | 0x10)); - if (PM_inpd(deviceIO) != 0xFFFFFFFFUL) { - memset(&pci,0,sizeof(pci)); - pci.dwSize = sizeof(pci); - pci.mech1 = 0; - pci.slot = slot; - lp = (ulong*)&(pci.VendorID); - for (i = 0; i < NUM_PCI_REG; i++, lp++) { - slot.p.Register = i; - *lp = PM_inpd(deviceIO + (i << 2)); - } - if (!CheckDuplicate(&pci,&prev)) { - if (info) - COPY_STRUCTURE(&info[numFound],&pci); - ++numFound; - } - prev = pci; - } - } - } - } - - /* Disable PCI config cycle on exit */ - PM_outpb(0xCF8,0); - return numFound; - } - - /* No hardware access mechanism 2 found */ - return 0; -} - -/**************************************************************************** -REMARKS: -This functions reads a configuration dword via the PCI BIOS. -****************************************************************************/ -static ulong PCIBIOS_readDWORD( - int index, - ulong slot) -{ - return (ulong)_PCIBIOS_service(READ_CONFIG_DWORD,slot >> 8,index,0,PCIEntry); -} - -/**************************************************************************** -PARAMETERS: -info - Array of PCIDeviceInfo structures to fill in -maxDevices - Maximum number of of devices to enumerate into array - -RETURNS: -Number of PCI devices found and enumerated on the PCI bus, 0 if not PCI. - -REMARKS: -Function to enumerate all available devices on the PCI bus into an array -of configuration information blocks. -****************************************************************************/ -static int PCI_enumerateBIOS( - PCIDeviceInfo info[]) -{ - uchar hwType,lastBus; - int bus,device,function,i,numFound = 0; - ulong *lp; - PCIslot slot = {{0,0,0,0,0,0,1}}; - PCIDeviceInfo pci,prev = {0}; - - if (PCIBIOS_detect(&hwType,&lastBus)) { - /* PCI BIOS access - the ultimate fallback */ - for (bus = 0; bus <= lastBus; bus++) { - slot.p.Bus = bus; - for (device = 0; device < 32; device++) { - slot.p.Device = device; - for (function = 0; function < 8; function++) { - slot.p.Function = function; - if (PCIBIOS_readDWORD(0,slot.i) != 0xFFFFFFFFUL) { - memset(&pci,0,sizeof(pci)); - pci.dwSize = sizeof(pci); - pci.mech1 = 2; - pci.slot = slot; - lp = (ulong*)&(pci.VendorID); - for (i = 0; i < NUM_PCI_REG; i++, lp++) - *lp = PCIBIOS_readDWORD(i << 2,slot.i); - if (!CheckDuplicate(&pci,&prev)) { - if (info) - COPY_STRUCTURE(&info[numFound],&pci); - ++numFound; - } - prev = pci; - } - } - } - } - } - - /* Return number of devices found */ - return numFound; -} - -/**************************************************************************** -PARAMETERS: -info - Array of PCIDeviceInfo structures to fill in -maxDevices - Maximum number of of devices to enumerate into array - -RETURNS: -Number of PCI devices found and enumerated on the PCI bus, 0 if not PCI. - -REMARKS: -Function to enumerate all available devices on the PCI bus into an array -of configuration information blocks. -****************************************************************************/ -int _ASMAPI PCI_enumerate( - PCIDeviceInfo info[]) -{ - int numFound; - - /* First try via the direct access mechanisms which are faster if we - * have them (nearly always). The BIOS is used as a fallback, and for - * stuff we can't do directly. - */ - if ((numFound = PCI_enumerateMech1(info)) == 0) { - if ((numFound = PCI_enumerateMech2(info)) == 0) { - if ((numFound = PCI_enumerateBIOS(info)) == 0) - return 0; - } - } - return numFound; -} - -/**************************************************************************** -PARAMETERS: -info - Array of PCIDeviceInfo structures to fill in -maxDevices - Maximum number of of devices to enumerate into array - -RETURNS: -Number of PCI devices found and enumerated on the PCI bus, 0 if not PCI. - -REMARKS: -Function to enumerate all available devices on the PCI bus into an array -of configuration information blocks. -****************************************************************************/ -int _ASMAPI PCI_getNumDevices(void) -{ - return PCI_enumerate(NULL); -} - -/**************************************************************************** -PARAMETERS: -bar - Base address to measure -pci - PCI device to access - -RETURNS: -Size of the PCI base address in bytes - -REMARKS: -This function measures the size of the PCI base address register in bytes, -by writing all F's to the register, and reading the value back. The size -of the base address is determines by the bits that are hardwired to zero's. -****************************************************************************/ -ulong _ASMAPI PCI_findBARSize( - int bar, - PCIDeviceInfo *pci) -{ - ulong base,size = 0; - - base = PCI_accessReg(bar,0,PCI_READ_DWORD,pci); - if (base && !(base & 0x1)) { - /* For some strange reason some devices don't properly decode - * their base address registers (Intel PCI/PCI bridges!), and - * we read completely bogus values. We check for that here - * and clear out those BAR's. - * - * We check for that here because at least the low 12 bits - * of the address range must be zeros, since the page size - * on IA32 processors is always 4Kb. - */ - if ((base & 0xFFF) == 0) { - PCI_accessReg(bar,0xFFFFFFFF,PCI_WRITE_DWORD,pci); - size = PCI_accessReg(bar,0,PCI_READ_DWORD,pci) & ~0xFF; - size = ~size+1; - PCI_accessReg(bar,base,PCI_WRITE_DWORD,pci); - } - } - pci->slot.p.Register = 0; - return size; -} - -/**************************************************************************** -PARAMETERS: -index - DWORD index of the register to access -value - Value to write to the register for write access -func - Function to implement - -RETURNS: -The value read from the register for read operations - -REMARKS: -The function code are defined as follows - -code - function -0 - Read BYTE -1 - Read WORD -2 - Read DWORD -3 - Write BYTE -4 - Write WORD -5 - Write DWORD -****************************************************************************/ -ulong _ASMAPI PCI_accessReg( - int index, - ulong value, - int func, - PCIDeviceInfo *info) -{ - int iobase; - - if (info->mech1 == 2) { - /* Use PCI BIOS access since we dont have direct hardware access */ - switch (func) { - case PCI_READ_BYTE: - return (uchar)_PCIBIOS_service(READ_CONFIG_BYTE,info->slot.i >> 8,index,0,PCIEntry); - case PCI_READ_WORD: - return (ushort)_PCIBIOS_service(READ_CONFIG_WORD,info->slot.i >> 8,index,0,PCIEntry); - case PCI_READ_DWORD: - return (ulong)_PCIBIOS_service(READ_CONFIG_DWORD,info->slot.i >> 8,index,0,PCIEntry); - case PCI_WRITE_BYTE: - _PCIBIOS_service(WRITE_CONFIG_BYTE,info->slot.i >> 8,index,value,PCIEntry); - break; - case PCI_WRITE_WORD: - _PCIBIOS_service(WRITE_CONFIG_WORD,info->slot.i >> 8,index,value,PCIEntry); - break; - case PCI_WRITE_DWORD: - _PCIBIOS_service(WRITE_CONFIG_DWORD,info->slot.i >> 8,index,value,PCIEntry); - break; - } - } - else { - /* Use direct hardware access mechanisms */ - if (info->mech1) { - /* PCI access mechanism 1 */ - iobase = 0xCFC + (index & 3); - info->slot.p.Register = index >> 2; - PM_outpd(0xCF8,info->slot.i); - } - else { - /* PCI access mechanism 2 */ - PM_outpb(0xCF8,(uchar)((info->slot.p.Function << 1) | 0x10)); - PM_outpb(0xCFA,(uchar)info->slot.p.Bus); - iobase = 0xC000 + (info->slot.p.Device << 8) + index; - } - switch (func) { - case PCI_READ_BYTE: - case PCI_READ_WORD: - case PCI_READ_DWORD: value = PM_inpd(iobase); break; - case PCI_WRITE_BYTE: PM_outpb(iobase,(uchar)value); break; - case PCI_WRITE_WORD: PM_outpw(iobase,(ushort)value); break; - case PCI_WRITE_DWORD: PM_outpd(iobase,(ulong)value); break; - } - PM_outpd(0xCF8,0); - } - return value; -} - -/**************************************************************************** -PARAMETERS: -numDevices - Number of devices to query info for - -RETURNS: -0 on success, -1 on error, number of devices to enumerate if numDevices = 0 - -REMARKS: -This function reads the PCI routing information. If you pass a value of -0 for numDevices, this function will return with the number of devices -needed in the routing buffer that will be filled in by the BIOS. -****************************************************************************/ -ibool _ASMAPI PCI_getIRQRoutingOptions( - int numDevices, - PCIRouteInfo *buffer) -{ - PCIRoutingOptionsBuffer buf; - int ret; - - if (PCIPhysEntry) { - buf.BufferSize = numDevices * sizeof(PCIRouteInfo); - buf.DataBuffer = buffer; - if ((ret = _PCIBIOS_getRouting(&buf,PCIEntry)) == 0x89) - return buf.BufferSize / sizeof(PCIRouteInfo); - if (ret != 0) - return -1; - return 0; - } - - /* We currently only support this via the PCI BIOS functions */ - return -1; -} - -/**************************************************************************** -PARAMETERS: -info - PCI device information for the specified device -intPin - Value to store in the PCI InterruptPin register -IRQ - New ISA IRQ to map the PCI interrupt to (0-15) - -RETURNS: -True on success, or false if this function failed. - -REMARKS: -This function changes the PCI IRQ routing for the specified device to the -desired PCI interrupt and the desired ISA bus compatible IRQ. This function -may not be supported by the PCI BIOS, in which case this function will -fail. -****************************************************************************/ -ibool _ASMAPI PCI_setHardwareIRQ( - PCIDeviceInfo *info, - uint intPin, - uint IRQ) -{ - if (PCIPhysEntry) { - if (_PCIBIOS_setIRQ(info->slot.i >> 8,intPin,IRQ,PCIEntry)) { - info->u.type0.InterruptPin = intPin; - info->u.type0.InterruptLine = IRQ; - return true; - } - return false; - } - - /* We currently only support this via the PCI BIOS functions */ - return false; -} - -/**************************************************************************** -PARAMETERS: -bus - Bus number to generate the special cycle for -specialCycleData - Data to send for the special cyle - -REMARKS: -This function generates a special cycle on the specified bus using with -the specified data. -****************************************************************************/ -void _ASMAPI PCI_generateSpecialCyle( - uint bus, - ulong specialCycleData) -{ - if (PCIPhysEntry) - _PCIBIOS_specialCycle(bus,specialCycleData,PCIEntry); - /* We currently only support this via the PCI BIOS functions */ -} - -/**************************************************************************** -PARAMETERS: -info - PCI device information block for device to access -index - Index of register to start reading from -dst - Place to store the values read from configuration space -count - Count of bytes to read from configuration space - -REMARKS: -This function is used to read a block of PCI configuration space registers -from the configuration space into the passed in data block. This function -will properly handle reading non-DWORD aligned data from the configuration -space correctly. -****************************************************************************/ -void _ASMAPI PCI_readRegBlock( - PCIDeviceInfo *info, - int index, - void *dst, - int count) -{ - uchar *pb; - ulong *pd; - int i; - int startCount = (index & 3); - int middleCount = (count - startCount) >> 2; - int endCount = count - middleCount * 4 - startCount; - - for (i = 0,pb = dst; i < startCount; i++, index++) { - *pb++ = (uchar)PCI_accessReg(index,0,PCI_READ_BYTE,info); - } - for (i = 0,pd = (ulong*)pb; i < middleCount; i++, index += 4) { - *pd++ = (ulong)PCI_accessReg(index,0,PCI_READ_DWORD,info); - } - for (i = 0,pb = (uchar*)pd; i < endCount; i++, index++) { - *pb++ = (uchar)PCI_accessReg(index,0,PCI_READ_BYTE,info); - } -} - -/**************************************************************************** -PARAMETERS: -info - PCI device information block for device to access -index - Index of register to start reading from -dst - Place to store the values read from configuration space -count - Count of bytes to read from configuration space - -REMARKS: -This function is used to write a block of PCI configuration space registers -to the configuration space from the passed in data block. This function -will properly handle writing non-DWORD aligned data to the configuration -space correctly. -****************************************************************************/ -void _ASMAPI PCI_writeRegBlock( - PCIDeviceInfo *info, - int index, - void *src, - int count) -{ - uchar *pb; - ulong *pd; - int i; - int startCount = (index & 3); - int middleCount = (count - startCount) >> 2; - int endCount = count - middleCount * 4 - startCount; - - for (i = 0,pb = src; i < startCount; i++, index++) { - PCI_accessReg(index,*pb++,PCI_WRITE_BYTE,info); - } - for (i = 0,pd = (ulong*)pb; i < middleCount; i++, index += 4) { - PCI_accessReg(index,*pd++,PCI_WRITE_DWORD,info); - } - for (i = 0,pb = (uchar*)pd; i < endCount; i++, index++) { - PCI_accessReg(index,*pb++,PCI_WRITE_BYTE,info); - } -} |
