23e83724df
Most (but not all) of these were found by using codespell --builtin clear,rare,usage,informal,code,names but not everything reported by that was fixed. Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
767 lines
21 KiB
C
767 lines
21 KiB
C
/*
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* XFree86 int10 module
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* execute BIOS int 10h calls in x86 real mode environment
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* Copyright 1999 Egbert Eich
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*
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* Part of this code was inspired by the VBIOS POSTing code in DOSEMU
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* developed by the "DOSEMU-Development-Team"
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*/
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/*
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* To debug port accesses define PRINT_PORT to 1.
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* Note! You also have to comment out ioperm()
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* in xf86EnableIO(). Otherwise we won't trap
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* on PIO.
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#define PRINT_PORT 0
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#include <unistd.h>
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#include <X11/Xos.h>
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#include "xf86.h"
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#include "xf86_OSproc.h"
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#include "compiler.h"
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#define _INT10_PRIVATE
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#include "int10Defines.h"
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#include "xf86int10.h"
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#include "Pci.h"
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#ifdef _X86EMU
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#include "x86emu/x86emui.h"
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#else
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#define DEBUG_IO_TRACE() 0
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#endif
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#include <pciaccess.h>
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static int pciCfg1in(uint16_t addr, uint32_t *val);
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static int pciCfg1out(uint16_t addr, uint32_t val);
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static int pciCfg1inw(uint16_t addr, uint16_t *val);
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static int pciCfg1outw(uint16_t addr, uint16_t val);
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static int pciCfg1inb(uint16_t addr, uint8_t *val);
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static int pciCfg1outb(uint16_t addr, uint8_t val);
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#if defined (_PC)
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static void SetResetBIOSVars(xf86Int10InfoPtr pInt, Bool set);
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#endif
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#define REG pInt
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int
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setup_int(xf86Int10InfoPtr pInt)
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{
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if (pInt != Int10Current) {
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if (!MapCurrentInt10(pInt))
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return -1;
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Int10Current = pInt;
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}
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X86_EAX = (uint32_t) pInt->ax;
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X86_EBX = (uint32_t) pInt->bx;
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X86_ECX = (uint32_t) pInt->cx;
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X86_EDX = (uint32_t) pInt->dx;
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X86_ESI = (uint32_t) pInt->si;
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X86_EDI = (uint32_t) pInt->di;
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X86_EBP = (uint32_t) pInt->bp;
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X86_ESP = 0x1000;
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X86_SS = pInt->stackseg >> 4;
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X86_EIP = 0x0600;
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X86_CS = 0x0; /* address of 'hlt' */
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X86_DS = 0x40; /* standard pc ds */
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X86_ES = pInt->es;
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X86_FS = 0;
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X86_GS = 0;
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X86_EFLAGS = X86_IF_MASK | X86_IOPL_MASK;
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#if defined (_PC)
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if (pInt->Flags & SET_BIOS_SCRATCH)
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SetResetBIOSVars(pInt, TRUE);
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#endif
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OsBlockSignals();
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return 0;
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}
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void
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finish_int(xf86Int10InfoPtr pInt, int sig)
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{
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OsReleaseSignals();
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pInt->ax = (uint32_t) X86_EAX;
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pInt->bx = (uint32_t) X86_EBX;
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pInt->cx = (uint32_t) X86_ECX;
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pInt->dx = (uint32_t) X86_EDX;
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pInt->si = (uint32_t) X86_ESI;
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pInt->di = (uint32_t) X86_EDI;
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pInt->es = (uint16_t) X86_ES;
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pInt->bp = (uint32_t) X86_EBP;
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pInt->flags = (uint32_t) X86_FLAGS;
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#if defined (_PC)
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if (pInt->Flags & RESTORE_BIOS_SCRATCH)
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SetResetBIOSVars(pInt, FALSE);
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#endif
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}
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/* general software interrupt handler */
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uint32_t
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getIntVect(xf86Int10InfoPtr pInt, int num)
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{
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return MEM_RW(pInt, num << 2) + (MEM_RW(pInt, (num << 2) + 2) << 4);
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}
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void
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pushw(xf86Int10InfoPtr pInt, uint16_t val)
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{
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X86_ESP -= 2;
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MEM_WW(pInt, ((uint32_t) X86_SS << 4) + X86_SP, val);
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}
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int
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run_bios_int(int num, xf86Int10InfoPtr pInt)
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{
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uint32_t eflags;
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#ifndef _PC
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/* check if bios vector is initialized */
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if (MEM_RW(pInt, (num << 2) + 2) == (SYS_BIOS >> 4)) { /* SYS_BIOS_SEG ? */
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if (num == 21 && X86_AH == 0x4e) {
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xf86DrvMsg(pInt->pScrn->scrnIndex, X_NOTICE,
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"Failing Find-Matching-File on non-PC"
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" (int 21, func 4e)\n");
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X86_AX = 2;
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SET_FLAG(F_CF);
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return 1;
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}
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else {
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xf86DrvMsgVerb(pInt->pScrn->scrnIndex, X_NOT_IMPLEMENTED, 2,
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"Ignoring int 0x%02x call\n", num);
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if (xf86GetVerbosity() > 3) {
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dump_registers(pInt);
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stack_trace(pInt);
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}
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return 1;
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}
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}
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#endif
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#ifdef PRINT_INT
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ErrorF("calling card BIOS at: ");
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#endif
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eflags = X86_EFLAGS;
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#if 0
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eflags = eflags | IF_MASK;
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X86_EFLAGS = X86_EFLAGS & ~(VIF_MASK | TF_MASK | IF_MASK | NT_MASK);
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#endif
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pushw(pInt, eflags);
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pushw(pInt, X86_CS);
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pushw(pInt, X86_IP);
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X86_CS = MEM_RW(pInt, (num << 2) + 2);
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X86_IP = MEM_RW(pInt, num << 2);
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#ifdef PRINT_INT
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ErrorF("0x%x:%lx\n", X86_CS, X86_EIP);
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#endif
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return 1;
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}
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/* Debugging stuff */
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void
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dump_code(xf86Int10InfoPtr pInt)
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{
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int i;
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uint32_t lina = SEG_ADR((uint32_t), X86_CS, IP);
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xf86DrvMsgVerb(pInt->pScrn->scrnIndex, X_INFO, 3, "code at 0x%8.8" PRIx32 ":\n",
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(unsigned) lina);
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for (i = 0; i < 0x10; i++)
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xf86ErrorFVerb(3, " %2.2x", MEM_RB(pInt, lina + i));
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xf86ErrorFVerb(3, "\n");
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for (; i < 0x20; i++)
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xf86ErrorFVerb(3, " %2.2x", MEM_RB(pInt, lina + i));
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xf86ErrorFVerb(3, "\n");
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}
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void
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dump_registers(xf86Int10InfoPtr pInt)
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{
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xf86DrvMsgVerb(pInt->pScrn->scrnIndex, X_INFO, 3,
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"EAX=0x%8.8lx, EBX=0x%8.8lx, ECX=0x%8.8lx, EDX=0x%8.8lx\n",
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(unsigned long) X86_EAX, (unsigned long) X86_EBX,
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(unsigned long) X86_ECX, (unsigned long) X86_EDX);
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xf86DrvMsgVerb(pInt->pScrn->scrnIndex, X_INFO, 3,
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"ESP=0x%8.8lx, EBP=0x%8.8lx, ESI=0x%8.8lx, EDI=0x%8.8lx\n",
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(unsigned long) X86_ESP, (unsigned long) X86_EBP,
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(unsigned long) X86_ESI, (unsigned long) X86_EDI);
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xf86DrvMsgVerb(pInt->pScrn->scrnIndex, X_INFO, 3,
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"CS=0x%4.4x, SS=0x%4.4x,"
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" DS=0x%4.4x, ES=0x%4.4x, FS=0x%4.4x, GS=0x%4.4x\n",
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X86_CS, X86_SS, X86_DS, X86_ES, X86_FS, X86_GS);
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xf86DrvMsgVerb(pInt->pScrn->scrnIndex, X_INFO, 3,
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"EIP=0x%8.8lx, EFLAGS=0x%8.8lx\n",
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(unsigned long) X86_EIP, (unsigned long) X86_EFLAGS);
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}
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void
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stack_trace(xf86Int10InfoPtr pInt)
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{
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int i = 0;
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unsigned long stack = SEG_ADR((uint32_t), X86_SS, SP);
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unsigned long tail = (uint32_t) ((X86_SS << 4) + 0x1000);
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if (stack >= tail)
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return;
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xf86MsgVerb(X_INFO, 3, "stack at 0x%8.8lx:\n", stack);
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for (; stack < tail; stack++) {
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xf86ErrorFVerb(3, " %2.2x", MEM_RB(pInt, stack));
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i = (i + 1) % 0x10;
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if (!i)
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xf86ErrorFVerb(3, "\n");
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}
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if (i)
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xf86ErrorFVerb(3, "\n");
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}
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int
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port_rep_inb(xf86Int10InfoPtr pInt,
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uint16_t port, uint32_t base, int d_f, uint32_t count)
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{
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register int inc = d_f ? -1 : 1;
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uint32_t dst = base;
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" rep_insb(%#x) %" PRIu32 " bytes at %8.8" PRIx32 " %s\n",
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port, (unsigned) count, (unsigned) base, d_f ? "up" : "down");
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while (count--) {
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MEM_WB(pInt, dst, x_inb(port));
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dst += inc;
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}
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return dst - base;
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}
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int
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port_rep_inw(xf86Int10InfoPtr pInt,
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uint16_t port, uint32_t base, int d_f, uint32_t count)
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{
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register int inc = d_f ? -2 : 2;
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uint32_t dst = base;
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" rep_insw(%#x) %" PRIu32 " bytes at %8.8" PRIx32 " %s\n",
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port, (unsigned) count, (unsigned) base, d_f ? "up" : "down");
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while (count--) {
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MEM_WW(pInt, dst, x_inw(port));
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dst += inc;
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}
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return dst - base;
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}
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int
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port_rep_inl(xf86Int10InfoPtr pInt,
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uint16_t port, uint32_t base, int d_f, uint32_t count)
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{
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register int inc = d_f ? -4 : 4;
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uint32_t dst = base;
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" rep_insl(%#x) %" PRIu32 " bytes at %8.8" PRIx32 " %s\n",
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port, (unsigned) count, (unsigned) base, d_f ? "up" : "down");
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while (count--) {
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MEM_WL(pInt, dst, x_inl(port));
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dst += inc;
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}
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return dst - base;
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}
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int
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port_rep_outb(xf86Int10InfoPtr pInt,
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uint16_t port, uint32_t base, int d_f, uint32_t count)
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{
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register int inc = d_f ? -1 : 1;
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uint32_t dst = base;
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" rep_outb(%#x) %" PRIu32 " bytes at %8.8" PRIx32 " %s\n",
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port, (unsigned) count, (unsigned) base, d_f ? "up" : "down");
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while (count--) {
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x_outb(port, MEM_RB(pInt, dst));
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dst += inc;
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}
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return dst - base;
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}
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int
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port_rep_outw(xf86Int10InfoPtr pInt,
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uint16_t port, uint32_t base, int d_f, uint32_t count)
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{
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register int inc = d_f ? -2 : 2;
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uint32_t dst = base;
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" rep_outw(%#x) %" PRIu32 " bytes at %8.8" PRIx32 " %s\n",
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port, (unsigned) count, (unsigned) base, d_f ? "up" : "down");
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while (count--) {
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x_outw(port, MEM_RW(pInt, dst));
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dst += inc;
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}
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return dst - base;
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}
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int
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port_rep_outl(xf86Int10InfoPtr pInt,
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uint16_t port, uint32_t base, int d_f, uint32_t count)
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{
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register int inc = d_f ? -4 : 4;
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uint32_t dst = base;
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" rep_outl(%#x) %" PRIu32 " bytes at %8.8" PRIx32 " %s\n",
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port, (unsigned) count, (unsigned) base, d_f ? "up" : "down");
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while (count--) {
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x_outl(port, MEM_RL(pInt, dst));
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dst += inc;
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}
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return dst - base;
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}
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uint8_t
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x_inb(uint16_t port)
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{
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uint8_t val;
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if (port == 0x40) {
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Int10Current->inb40time++;
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val = (uint8_t) (Int10Current->inb40time >>
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((Int10Current->inb40time & 1) << 3));
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" inb(%#x) = %2.2x\n", port, val);
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#ifdef __NOT_YET__
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}
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else if (port < 0x0100) { /* Don't interfere with mainboard */
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val = 0;
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xf86DrvMsgVerb(Int10Current->pScrn->scrnIndex, X_NOT_IMPLEMENTED, 2,
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"inb 0x%4.4x\n", port);
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if (xf86GetVerbosity() > 3) {
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dump_registers(Int10Current);
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stack_trace(Int10Current);
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}
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#endif /* __NOT_YET__ */
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}
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else if (!pciCfg1inb(port, &val)) {
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val = pci_io_read8(Int10Current->io, port);
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" inb(%#x) = %2.2x\n", port, val);
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}
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return val;
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}
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uint16_t
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x_inw(uint16_t port)
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{
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uint16_t val;
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if (port == 0x5c) {
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struct timeval tv;
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/*
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* Emulate a PC's timer. Typical resolution is 3.26 usec.
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* Approximate this by dividing by 3.
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*/
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X_GETTIMEOFDAY(&tv);
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val = (uint16_t) (tv.tv_usec / 3);
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}
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else if (!pciCfg1inw(port, &val)) {
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val = pci_io_read16(Int10Current->io, port);
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" inw(%#x) = %4.4x\n", port, val);
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}
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return val;
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}
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void
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x_outb(uint16_t port, uint8_t val)
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{
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if ((port == 0x43) && (val == 0)) {
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struct timeval tv;
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/*
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* Emulate a PC's timer 0. Such timers typically have a resolution of
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* some .838 usec per tick, but this can only provide 1 usec per tick.
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* (Not that this matters much, given inherent emulation delays.) Use
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* the bottom bit as a byte select. See inb(0x40) above.
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*/
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X_GETTIMEOFDAY(&tv);
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Int10Current->inb40time = (uint16_t) (tv.tv_usec | 1);
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" outb(%#x, %2.2x)\n", port, val);
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#ifdef __NOT_YET__
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}
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else if (port < 0x0100) { /* Don't interfere with mainboard */
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xf86DrvMsgVerb(Int10Current->pScrn->scrnIndex, X_NOT_IMPLEMENTED, 2,
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"outb 0x%4.4x,0x%2.2x\n", port, val);
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if (xf86GetVerbosity() > 3) {
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dump_registers(Int10Current);
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stack_trace(Int10Current);
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}
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#endif /* __NOT_YET__ */
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}
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else if (!pciCfg1outb(port, val)) {
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" outb(%#x, %2.2x)\n", port, val);
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pci_io_write8(Int10Current->io, port, val);
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}
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}
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void
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x_outw(uint16_t port, uint16_t val)
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{
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if (!pciCfg1outw(port, val)) {
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" outw(%#x, %4.4x)\n", port, val);
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pci_io_write16(Int10Current->io, port, val);
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}
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}
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uint32_t
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x_inl(uint16_t port)
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{
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uint32_t val;
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if (!pciCfg1in(port, &val)) {
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val = pci_io_read32(Int10Current->io, port);
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" inl(%#x) = %8.8" PRIx32 "\n", port, (unsigned) val);
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}
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return val;
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}
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void
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x_outl(uint16_t port, uint32_t val)
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{
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if (!pciCfg1out(port, val)) {
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if (PRINT_PORT && DEBUG_IO_TRACE())
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ErrorF(" outl(%#x, %8.8" PRIx32 ")\n", port, (unsigned) val);
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pci_io_write32(Int10Current->io, port, val);
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}
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}
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uint8_t
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Mem_rb(uint32_t addr)
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{
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return (*Int10Current->mem->rb) (Int10Current, addr);
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}
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uint16_t
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Mem_rw(uint32_t addr)
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{
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return (*Int10Current->mem->rw) (Int10Current, addr);
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}
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uint32_t
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Mem_rl(uint32_t addr)
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{
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return (*Int10Current->mem->rl) (Int10Current, addr);
|
|
}
|
|
|
|
void
|
|
Mem_wb(uint32_t addr, uint8_t val)
|
|
{
|
|
(*Int10Current->mem->wb) (Int10Current, addr, val);
|
|
}
|
|
|
|
void
|
|
Mem_ww(uint32_t addr, uint16_t val)
|
|
{
|
|
(*Int10Current->mem->ww) (Int10Current, addr, val);
|
|
}
|
|
|
|
void
|
|
Mem_wl(uint32_t addr, uint32_t val)
|
|
{
|
|
(*Int10Current->mem->wl) (Int10Current, addr, val);
|
|
}
|
|
|
|
static uint32_t PciCfg1Addr = 0;
|
|
|
|
#define PCI_DOM_FROM_TAG(tag) (((tag) >> 24) & (PCI_DOM_MASK))
|
|
#define PCI_BUS_FROM_TAG(tag) (((tag) >> 16) & (PCI_DOMBUS_MASK))
|
|
#define PCI_DEV_FROM_TAG(tag) (((tag) & 0x0000f800u) >> 11)
|
|
#define PCI_FUNC_FROM_TAG(tag) (((tag) & 0x00000700u) >> 8)
|
|
|
|
#define PCI_OFFSET(x) ((x) & 0x000000ff)
|
|
#define PCI_TAG(x) ((x) & 0x7fffff00)
|
|
|
|
static struct pci_device *
|
|
pci_device_for_cfg_address(uint32_t addr)
|
|
{
|
|
struct pci_device *dev = NULL;
|
|
uint32_t tag = PCI_TAG(addr);
|
|
|
|
struct pci_slot_match slot_match = {
|
|
.domain = PCI_DOM_FROM_TAG(tag),
|
|
.bus = PCI_BUS_NO_DOMAIN(PCI_BUS_FROM_TAG(tag)),
|
|
.dev = PCI_DEV_FROM_TAG(tag),
|
|
.func = PCI_FUNC_FROM_TAG(tag),
|
|
.match_data = 0
|
|
};
|
|
|
|
struct pci_device_iterator *iter =
|
|
pci_slot_match_iterator_create(&slot_match);
|
|
|
|
if (iter)
|
|
dev = pci_device_next(iter);
|
|
|
|
pci_iterator_destroy(iter);
|
|
|
|
return dev;
|
|
}
|
|
|
|
static int
|
|
pciCfg1in(uint16_t addr, uint32_t *val)
|
|
{
|
|
if (addr == 0xCF8) {
|
|
*val = PciCfg1Addr;
|
|
return 1;
|
|
}
|
|
if (addr == 0xCFC) {
|
|
pci_device_cfg_read_u32(pci_device_for_cfg_address(PciCfg1Addr),
|
|
(uint32_t *) val, PCI_OFFSET(PciCfg1Addr));
|
|
if (PRINT_PORT && DEBUG_IO_TRACE())
|
|
ErrorF(" cfg_inl(%#" PRIx32 ") = %8.8" PRIx32 "\n", (unsigned) PciCfg1Addr,
|
|
(unsigned) *val);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
pciCfg1out(uint16_t addr, uint32_t val)
|
|
{
|
|
if (addr == 0xCF8) {
|
|
PciCfg1Addr = val;
|
|
return 1;
|
|
}
|
|
if (addr == 0xCFC) {
|
|
if (PRINT_PORT && DEBUG_IO_TRACE())
|
|
ErrorF(" cfg_outl(%#" PRIx32 ", %8.8" PRIx32 ")\n", (unsigned) PciCfg1Addr,
|
|
(unsigned) val);
|
|
pci_device_cfg_write_u32(pci_device_for_cfg_address(PciCfg1Addr), val,
|
|
PCI_OFFSET(PciCfg1Addr));
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
pciCfg1inw(uint16_t addr, uint16_t *val)
|
|
{
|
|
int shift;
|
|
|
|
if ((addr >= 0xCF8) && (addr <= 0xCFB)) {
|
|
shift = (addr - 0xCF8) * 8;
|
|
*val = (PciCfg1Addr >> shift) & 0xffff;
|
|
return 1;
|
|
}
|
|
if ((addr >= 0xCFC) && (addr <= 0xCFF)) {
|
|
const unsigned offset = addr - 0xCFC;
|
|
|
|
pci_device_cfg_read_u16(pci_device_for_cfg_address(PciCfg1Addr),
|
|
val, PCI_OFFSET(PciCfg1Addr) + offset);
|
|
if (PRINT_PORT && DEBUG_IO_TRACE())
|
|
ErrorF(" cfg_inw(%#" PRIx32 ") = %4.4x\n", (unsigned) (PciCfg1Addr + offset),
|
|
(unsigned) *val);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
pciCfg1outw(uint16_t addr, uint16_t val)
|
|
{
|
|
int shift;
|
|
|
|
if ((addr >= 0xCF8) && (addr <= 0xCFB)) {
|
|
shift = (addr - 0xCF8) * 8;
|
|
PciCfg1Addr &= ~(0xffff << shift);
|
|
PciCfg1Addr |= ((uint32_t) val) << shift;
|
|
return 1;
|
|
}
|
|
if ((addr >= 0xCFC) && (addr <= 0xCFF)) {
|
|
const unsigned offset = addr - 0xCFC;
|
|
|
|
if (PRINT_PORT && DEBUG_IO_TRACE())
|
|
ErrorF(" cfg_outw(%#" PRIx32 ", %4.4x)\n", (unsigned) (PciCfg1Addr + offset),
|
|
(unsigned) val);
|
|
pci_device_cfg_write_u16(pci_device_for_cfg_address(PciCfg1Addr), val,
|
|
PCI_OFFSET(PciCfg1Addr) + offset);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
pciCfg1inb(uint16_t addr, uint8_t *val)
|
|
{
|
|
int shift;
|
|
|
|
if ((addr >= 0xCF8) && (addr <= 0xCFB)) {
|
|
shift = (addr - 0xCF8) * 8;
|
|
*val = (PciCfg1Addr >> shift) & 0xff;
|
|
return 1;
|
|
}
|
|
if ((addr >= 0xCFC) && (addr <= 0xCFF)) {
|
|
const unsigned offset = addr - 0xCFC;
|
|
|
|
pci_device_cfg_read_u8(pci_device_for_cfg_address(PciCfg1Addr),
|
|
val, PCI_OFFSET(PciCfg1Addr) + offset);
|
|
if (PRINT_PORT && DEBUG_IO_TRACE())
|
|
ErrorF(" cfg_inb(%#" PRIx32 ") = %2.2x\n", (unsigned) (PciCfg1Addr + offset),
|
|
(unsigned) *val);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
pciCfg1outb(uint16_t addr, uint8_t val)
|
|
{
|
|
int shift;
|
|
|
|
if ((addr >= 0xCF8) && (addr <= 0xCFB)) {
|
|
shift = (addr - 0xCF8) * 8;
|
|
PciCfg1Addr &= ~(0xff << shift);
|
|
PciCfg1Addr |= ((uint32_t) val) << shift;
|
|
return 1;
|
|
}
|
|
if ((addr >= 0xCFC) && (addr <= 0xCFF)) {
|
|
const unsigned offset = addr - 0xCFC;
|
|
|
|
if (PRINT_PORT && DEBUG_IO_TRACE())
|
|
ErrorF(" cfg_outb(%#" PRIx32 ", %2.2x)\n", (unsigned) (PciCfg1Addr + offset),
|
|
(unsigned) val);
|
|
pci_device_cfg_write_u8(pci_device_for_cfg_address(PciCfg1Addr), val,
|
|
PCI_OFFSET(PciCfg1Addr) + offset);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
uint8_t
|
|
bios_checksum(const uint8_t *start, int size)
|
|
{
|
|
uint8_t sum = 0;
|
|
|
|
while (size-- > 0)
|
|
sum += *start++;
|
|
return sum;
|
|
}
|
|
|
|
/*
|
|
* Lock/Unlock legacy VGA. Some Bioses try to be very clever and make
|
|
* an attempt to detect a legacy ISA card. If they find one they might
|
|
* act very strange: for example they might configure the card as a
|
|
* monochrome card. This might cause some drivers to choke.
|
|
* To avoid this we attempt legacy VGA by writing to all known VGA
|
|
* disable registers before we call the BIOS initialization and
|
|
* restore the original values afterwards. In between we hold our
|
|
* breath. To get to a (possibly existing) ISA card need to disable
|
|
* our current PCI card.
|
|
*/
|
|
/*
|
|
* This is just for booting: we just want to catch pure
|
|
* legacy vga therefore we don't worry about mmio etc.
|
|
* This stuff should really go into vgaHW.c. However then
|
|
* the driver would have to load the vga-module prior to
|
|
* doing int10.
|
|
*/
|
|
void
|
|
LockLegacyVGA(xf86Int10InfoPtr pInt, legacyVGAPtr vga)
|
|
{
|
|
vga->save_msr = pci_io_read8(pInt->io, 0x03CC);
|
|
vga->save_vse = pci_io_read8(pInt->io, 0x03C3);
|
|
#ifndef __ia64__
|
|
vga->save_46e8 = pci_io_read8(pInt->io, 0x46E8);
|
|
#endif
|
|
vga->save_pos102 = pci_io_read8(pInt->io, 0x0102);
|
|
pci_io_write8(pInt->io, 0x03C2, ~(uint8_t) 0x03 & vga->save_msr);
|
|
pci_io_write8(pInt->io, 0x03C3, ~(uint8_t) 0x01 & vga->save_vse);
|
|
#ifndef __ia64__
|
|
pci_io_write8(pInt->io, 0x46E8, ~(uint8_t) 0x08 & vga->save_46e8);
|
|
#endif
|
|
pci_io_write8(pInt->io, 0x0102, ~(uint8_t) 0x01 & vga->save_pos102);
|
|
}
|
|
|
|
void
|
|
UnlockLegacyVGA(xf86Int10InfoPtr pInt, legacyVGAPtr vga)
|
|
{
|
|
pci_io_write8(pInt->io, 0x0102, vga->save_pos102);
|
|
#ifndef __ia64__
|
|
pci_io_write8(pInt->io, 0x46E8, vga->save_46e8);
|
|
#endif
|
|
pci_io_write8(pInt->io, 0x03C3, vga->save_vse);
|
|
pci_io_write8(pInt->io, 0x03C2, vga->save_msr);
|
|
}
|
|
|
|
#if defined (_PC)
|
|
static void
|
|
SetResetBIOSVars(xf86Int10InfoPtr pInt, Bool set)
|
|
{
|
|
int pagesize = getpagesize();
|
|
unsigned char *base;
|
|
int i;
|
|
|
|
if (pci_device_map_legacy
|
|
(pInt->dev, 0, pagesize, PCI_DEV_MAP_FLAG_WRITABLE, (void **) &base))
|
|
return; /* eek */
|
|
|
|
if (set) {
|
|
for (i = BIOS_SCRATCH_OFF; i < BIOS_SCRATCH_END; i++)
|
|
MEM_WW(pInt, i, *(base + i));
|
|
}
|
|
else {
|
|
for (i = BIOS_SCRATCH_OFF; i < BIOS_SCRATCH_END; i++)
|
|
*(base + i) = MEM_RW(pInt, i);
|
|
}
|
|
|
|
pci_device_unmap_legacy(pInt->dev, base, pagesize);
|
|
}
|
|
|
|
void
|
|
xf86Int10SaveRestoreBIOSVars(xf86Int10InfoPtr pInt, Bool save)
|
|
{
|
|
int pagesize = getpagesize();
|
|
unsigned char *base;
|
|
int i;
|
|
|
|
if (!xf86IsEntityPrimary(pInt->entityIndex)
|
|
|| (!save && !pInt->BIOSScratch))
|
|
return;
|
|
|
|
if (pci_device_map_legacy
|
|
(pInt->dev, 0, pagesize, PCI_DEV_MAP_FLAG_WRITABLE, (void **) &base))
|
|
return; /* eek */
|
|
|
|
base += BIOS_SCRATCH_OFF;
|
|
if (save) {
|
|
if ((pInt->BIOSScratch = xnfalloc(BIOS_SCRATCH_LEN)))
|
|
for (i = 0; i < BIOS_SCRATCH_LEN; i++)
|
|
*(((char *) pInt->BIOSScratch + i)) = *(base + i);
|
|
}
|
|
else {
|
|
if (pInt->BIOSScratch) {
|
|
for (i = 0; i < BIOS_SCRATCH_LEN; i++)
|
|
*(base + i) = *(pInt->BIOSScratch + i);
|
|
free(pInt->BIOSScratch);
|
|
pInt->BIOSScratch = NULL;
|
|
}
|
|
}
|
|
|
|
pci_device_unmap_legacy(pInt->dev, base - BIOS_SCRATCH_OFF, pagesize);
|
|
}
|
|
#endif
|
|
|
|
xf86Int10InfoPtr
|
|
xf86InitInt10(int entityIndex)
|
|
{
|
|
return xf86ExtendedInitInt10(entityIndex, 0);
|
|
}
|