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Diffstat (limited to 'hw/xfree86/os-support/linux/int10/linux.c')
-rw-r--r--hw/xfree86/os-support/linux/int10/linux.c627
1 files changed, 627 insertions, 0 deletions
diff --git a/hw/xfree86/os-support/linux/int10/linux.c b/hw/xfree86/os-support/linux/int10/linux.c
new file mode 100644
index 000000000..4ef765451
--- /dev/null
+++ b/hw/xfree86/os-support/linux/int10/linux.c
@@ -0,0 +1,627 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/int10/linux.c,v 1.29 2002/10/16 21:13:47 dawes Exp $ */
+/*
+ * linux specific part of the int10 module
+ * Copyright 1999 Egbert Eich
+ */
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "xf86_ansic.h"
+#include "xf86Pci.h"
+#include "compiler.h"
+#define _INT10_PRIVATE
+#include "xf86int10.h"
+#ifdef __sparc__
+#define DEV_MEM "/dev/fb"
+#else
+#define DEV_MEM "/dev/mem"
+#endif
+#ifndef XFree86LOADER
+#include <sys/mman.h>
+#ifndef MAP_FAILED
+#define MAP_FAILED ((void *)-1)
+#endif
+#endif
+#define ALLOC_ENTRIES(x) ((V_RAM / x) - 1)
+#define SHMERRORPTR (pointer)(-1)
+
+static int counter = 0;
+static unsigned long int10Generation = 0;
+
+static CARD8 read_b(xf86Int10InfoPtr pInt, int addr);
+static CARD16 read_w(xf86Int10InfoPtr pInt, int addr);
+static CARD32 read_l(xf86Int10InfoPtr pInt, int addr);
+static void write_b(xf86Int10InfoPtr pInt, int addr, CARD8 val);
+static void write_w(xf86Int10InfoPtr pInt, int addr, CARD16 val);
+static void write_l(xf86Int10InfoPtr pInt, int addr, CARD32 val);
+
+int10MemRec linuxMem = {
+ read_b,
+ read_w,
+ read_l,
+ write_b,
+ write_w,
+ write_l
+};
+
+typedef struct {
+ int lowMem;
+ int highMem;
+ char* base;
+ char* base_high;
+ int screen;
+ char* alloc;
+} linuxInt10Priv;
+
+#if defined DoSubModules
+
+typedef enum {
+ INT10_NOT_LOADED,
+ INT10_LOADED_VM86,
+ INT10_LOADED_X86EMU,
+ INT10_LOAD_FAILED
+} Int10LinuxSubModuleState;
+
+static Int10LinuxSubModuleState loadedSubModule = INT10_NOT_LOADED;
+
+static Int10LinuxSubModuleState int10LinuxLoadSubModule(ScrnInfoPtr pScrn);
+
+#endif /* DoSubModules */
+
+xf86Int10InfoPtr
+xf86InitInt10(int entityIndex)
+{
+ return xf86ExtendedInitInt10(entityIndex, 0);
+}
+
+xf86Int10InfoPtr
+xf86ExtendedInitInt10(int entityIndex, int Flags)
+{
+ xf86Int10InfoPtr pInt = NULL;
+ CARD8 *bios_base;
+ int screen;
+ int fd;
+ static void* vidMem = NULL;
+ static void* sysMem = NULL;
+ void* vMem = NULL;
+ void *options = NULL;
+ int low_mem;
+ int high_mem = -1;
+ char *base = SHMERRORPTR;
+ char *base_high = SHMERRORPTR;
+ int pagesize;
+ memType cs;
+ legacyVGARec vga;
+ xf86int10BiosLocation bios;
+ Bool videoBiosMapped = FALSE;
+
+ if (int10Generation != serverGeneration) {
+ counter = 0;
+ int10Generation = serverGeneration;
+ }
+
+ screen = (xf86FindScreenForEntity(entityIndex))->scrnIndex;
+
+ options = xf86HandleInt10Options(xf86Screens[screen],entityIndex);
+
+ if (int10skip(options)) {
+ xfree(options);
+ return NULL;
+ }
+
+#if defined DoSubModules
+ if (loadedSubModule == INT10_NOT_LOADED)
+ loadedSubModule = int10LinuxLoadSubModule(xf86Screens[screen]);
+
+ if (loadedSubModule == INT10_LOAD_FAILED)
+ return NULL;
+#endif
+
+ if ((!vidMem) || (!sysMem)) {
+ if ((fd = open(DEV_MEM, O_RDWR, 0)) >= 0) {
+ if (!sysMem) {
+#ifdef DEBUG
+ ErrorF("Mapping sys bios area\n");
+#endif
+ if ((sysMem = mmap((void *)(SYS_BIOS), BIOS_SIZE,
+ PROT_READ | PROT_WRITE | PROT_EXEC,
+ MAP_SHARED | MAP_FIXED, fd, SYS_BIOS))
+ == MAP_FAILED) {
+ xf86DrvMsg(screen, X_ERROR, "Cannot map SYS BIOS\n");
+ close(fd);
+ goto error0;
+ }
+ }
+ if (!vidMem) {
+#ifdef DEBUG
+ ErrorF("Mapping VRAM area\n");
+#endif
+ if ((vidMem = mmap((void *)(V_RAM), VRAM_SIZE,
+ PROT_READ | PROT_WRITE | PROT_EXEC,
+ MAP_SHARED | MAP_FIXED, fd, V_RAM))
+ == MAP_FAILED) {
+ xf86DrvMsg(screen, X_ERROR, "Cannot map V_RAM\n");
+ close(fd);
+ goto error0;
+ }
+ }
+ close(fd);
+ } else {
+ xf86DrvMsg(screen, X_ERROR, "Cannot open %s\n", DEV_MEM);
+ goto error0;
+ }
+ }
+
+ pInt = (xf86Int10InfoPtr)xnfcalloc(1, sizeof(xf86Int10InfoRec));
+ pInt->scrnIndex = screen;
+ pInt->entityIndex = entityIndex;
+ if (!xf86Int10ExecSetup(pInt))
+ goto error0;
+ pInt->mem = &linuxMem;
+ pagesize = getpagesize();
+ pInt->private = (pointer)xnfcalloc(1, sizeof(linuxInt10Priv));
+ ((linuxInt10Priv*)pInt->private)->screen = screen;
+ ((linuxInt10Priv*)pInt->private)->alloc =
+ (pointer)xnfcalloc(1, ALLOC_ENTRIES(pagesize));
+
+ if (!xf86IsEntityPrimary(entityIndex)) {
+#ifdef DEBUG
+ ErrorF("Mapping high memory area\n");
+#endif
+ if ((high_mem = shmget(counter++, HIGH_MEM_SIZE,
+ IPC_CREAT | SHM_R | SHM_W)) == -1) {
+ if (errno == ENOSYS)
+ xf86DrvMsg(screen, X_ERROR, "shmget error\n Please reconfigure"
+ " your kernel to include System V IPC support\n");
+ goto error1;
+ }
+ } else {
+#ifdef DEBUG
+ ErrorF("Mapping Video BIOS\n");
+#endif
+ videoBiosMapped = TRUE;
+ if ((fd = open(DEV_MEM, O_RDWR, 0)) >= 0) {
+ if ((vMem = mmap((void *)(V_BIOS), SYS_BIOS - V_BIOS,
+ PROT_READ | PROT_WRITE | PROT_EXEC,
+ MAP_SHARED | MAP_FIXED, fd, V_BIOS))
+ == MAP_FAILED) {
+ xf86DrvMsg(screen, X_ERROR, "Cannot map V_BIOS\n");
+ close(fd);
+ goto error1;
+ }
+ close (fd);
+ } else
+ goto error1;
+ }
+ ((linuxInt10Priv*)pInt->private)->highMem = high_mem;
+
+#ifdef DEBUG
+ ErrorF("Mapping 640kB area\n");
+#endif
+ if ((low_mem = shmget(counter++, V_RAM,
+ IPC_CREAT | SHM_R | SHM_W)) == -1)
+ goto error2;
+
+ ((linuxInt10Priv*)pInt->private)->lowMem = low_mem;
+ base = shmat(low_mem, 0, 0);
+ if (base == SHMERRORPTR) goto error4;
+ ((linuxInt10Priv *)pInt->private)->base = base;
+ if (high_mem > -1) {
+ base_high = shmat(high_mem, 0, 0);
+ if (base_high == SHMERRORPTR) goto error4;
+ ((linuxInt10Priv*)pInt->private)->base_high = base_high;
+ } else
+ ((linuxInt10Priv*)pInt->private)->base_high = NULL;
+
+ MapCurrentInt10(pInt);
+ Int10Current = pInt;
+
+#ifdef DEBUG
+ ErrorF("Mapping int area\n");
+#endif
+ if (xf86ReadBIOS(0, 0, (unsigned char *)0, LOW_PAGE_SIZE) < 0) {
+ xf86DrvMsg(screen, X_ERROR, "Cannot read int vect\n");
+ goto error3;
+ }
+#ifdef DEBUG
+ ErrorF("done\n");
+#endif
+ /*
+ * Read in everything between V_BIOS and SYS_BIOS as some system BIOSes
+ * have executable code there. Note that xf86ReadBIOS() can only bring in
+ * 64K bytes at a time.
+ */
+ if (!videoBiosMapped) {
+ (void)memset((pointer)V_BIOS, 0, SYS_BIOS - V_BIOS);
+#ifdef DEBUG
+ ErrorF("Reading BIOS\n");
+#endif
+ for (cs = V_BIOS; cs < SYS_BIOS; cs += V_BIOS_SIZE)
+ if (xf86ReadBIOS(cs, 0, (pointer)cs, V_BIOS_SIZE) < V_BIOS_SIZE)
+ xf86DrvMsg(screen, X_WARNING,
+ "Unable to retrieve all of segment 0x%06X.\n", cs);
+#ifdef DEBUG
+ ErrorF("done\n");
+#endif
+ }
+
+ xf86int10ParseBiosLocation(options,&bios);
+
+ if (xf86IsEntityPrimary(entityIndex)
+ && !(initPrimary(options))) {
+ if (bios.bus == BUS_ISA && bios.location.legacy) {
+ xf86DrvMsg(screen, X_CONFIG,
+ "Overriding BIOS location: 0x%lx\n",
+ bios.location.legacy);
+ cs = bios.location.legacy >> 4;
+ bios_base = (unsigned char *)(cs << 4);
+ if (!int10_check_bios(screen, cs, bios_base)) {
+ xf86DrvMsg(screen, X_ERROR,
+ "No V_BIOS at specified address 0x%x\n",cs << 4);
+ goto error3;
+ }
+ } else {
+ if (bios.bus == BUS_PCI) {
+ xf86DrvMsg(screen, X_WARNING,
+ "Option BiosLocation for primary device ignored: "
+ "It points to PCI.\n");
+ xf86DrvMsg(screen, X_WARNING,
+ "You must set Option InitPrimary also\n");
+ }
+
+ cs = ((CARD16*)0)[(0x10<<1) + 1];
+
+ bios_base = (unsigned char *)(cs << 4);
+
+ if (!int10_check_bios(screen, cs, bios_base)) {
+ cs = ((CARD16*)0)[(0x42 << 1) + 1];
+ bios_base = (unsigned char *)(cs << 4);
+ if (!int10_check_bios(screen, cs, bios_base)) {
+ cs = V_BIOS >> 4;
+ bios_base = (unsigned char *)(cs << 4);
+ if (!int10_check_bios(screen, cs, bios_base)) {
+ xf86DrvMsg(screen, X_ERROR, "No V_BIOS found\n");
+ goto error3;
+ }
+ }
+ }
+ }
+
+ xf86DrvMsg(screen, X_INFO, "Primary V_BIOS segment is: 0x%x\n", cs);
+
+ pInt->BIOSseg = cs;
+ set_return_trap(pInt);
+#ifdef _PC
+ pInt->Flags = Flags & (SET_BIOS_SCRATCH | RESTORE_BIOS_SCRATCH);
+ if (! (pInt->Flags & SET_BIOS_SCRATCH))
+ pInt->Flags &= ~RESTORE_BIOS_SCRATCH;
+ xf86Int10SaveRestoreBIOSVars(pInt, TRUE);
+#endif
+ } else {
+ EntityInfoPtr pEnt = xf86GetEntityInfo(pInt->entityIndex);
+ BusType location_type;
+
+ if (bios.bus != BUS_NONE) {
+ switch (location_type = bios.bus) {
+ case BUS_PCI:
+ xf86DrvMsg(screen,X_CONFIG,"Overriding bios location: "
+ "PCI:%i:%i%i\n",bios.location.pci.bus,
+ bios.location.pci.dev,bios.location.pci.func);
+ break;
+ case BUS_ISA:
+ if (bios.location.legacy)
+ xf86DrvMsg(screen,X_CONFIG,"Overriding bios location: "
+ "Legacy:0x%x\n",bios.location.legacy);
+ else
+ xf86DrvMsg(screen,X_CONFIG,"Overriding bios location: "
+ "Legacy\n");
+ break;
+ default:
+ break;
+ }
+ } else
+ location_type = pEnt->location.type;
+
+ switch (location_type) {
+ case BUS_PCI:
+ {
+ int pci_entity;
+
+ if (bios.bus == BUS_PCI)
+ pci_entity = xf86GetPciEntity(bios.location.pci.bus,
+ bios.location.pci.dev,
+ bios.location.pci.func);
+ else
+ pci_entity = pInt->entityIndex;
+ if (!mapPciRom(pci_entity, (unsigned char *)(V_BIOS))) {
+ xf86DrvMsg(screen, X_ERROR, "Cannot read V_BIOS\n");
+ goto error3;
+ }
+ pInt->BIOSseg = V_BIOS >> 4;
+ break;
+ }
+ case BUS_ISA:
+ if (bios.bus == BUS_ISA && bios.location.legacy) {
+ cs = bios.location.legacy >> 4;
+ bios_base = (unsigned char *)(cs << 4);
+ if (!int10_check_bios(screen, cs, bios_base)) {
+ xf86DrvMsg(screen,X_ERROR,"No V_BIOS found "
+ "on override address 0x%x\n",bios_base);
+ goto error3;
+ }
+ } else {
+ cs = ((CARD16*)0)[(0x10<<1)+1];
+ bios_base = (unsigned char *)(cs << 4);
+
+ if (!int10_check_bios(screen, cs, bios_base)) {
+ cs = ((CARD16*)0)[(0x42<<1)+1];
+ bios_base = (unsigned char *)(cs << 4);
+ if (!int10_check_bios(screen, cs, bios_base)) {
+ cs = V_BIOS >> 4;
+ bios_base = (unsigned char *)(cs << 4);
+ if (!int10_check_bios(screen, cs, bios_base)) {
+ xf86DrvMsg(screen,X_ERROR,"No V_BIOS found\n");
+ goto error3;
+ }
+ }
+ }
+ }
+ xf86DrvMsg(screen,X_INFO,"Primary V_BIOS segment is: 0x%x\n",cs);
+ pInt->BIOSseg = cs;
+ break;
+ default:
+ goto error3;
+ }
+ xfree(pEnt);
+ pInt->num = 0xe6;
+ reset_int_vect(pInt);
+ set_return_trap(pInt);
+ LockLegacyVGA(pInt, &vga);
+ xf86ExecX86int10(pInt);
+ UnlockLegacyVGA(pInt, &vga);
+ }
+#ifdef DEBUG
+ dprint(0xc0000, 0x20);
+#endif
+
+ xfree(options);
+ return pInt;
+
+error4:
+ xf86DrvMsg(screen, X_ERROR, "shmat() call retruned errno %d\n", errno);
+error3:
+ if (base_high)
+ shmdt(base_high);
+ shmdt(base);
+ shmdt(0);
+ if (base_high)
+ shmdt((char*)HIGH_MEM);
+ shmctl(low_mem, IPC_RMID, NULL);
+ Int10Current = NULL;
+error2:
+ if (high_mem > -1)
+ shmctl(high_mem, IPC_RMID,NULL);
+error1:
+ if (vMem)
+ munmap(vMem, SYS_BIOS - V_BIOS);
+ xfree(((linuxInt10Priv*)pInt->private)->alloc);
+ xfree(pInt->private);
+error0:
+ xfree(options);
+ xfree(pInt);
+ return NULL;
+}
+
+Bool
+MapCurrentInt10(xf86Int10InfoPtr pInt)
+{
+ pointer addr;
+ int fd = -1;
+
+ if (Int10Current) {
+ shmdt(0);
+ if (((linuxInt10Priv*)Int10Current->private)->highMem >= 0)
+ shmdt((char*)HIGH_MEM);
+ else
+ munmap((pointer)V_BIOS, (SYS_BIOS - V_BIOS));
+ }
+ addr = shmat(((linuxInt10Priv*)pInt->private)->lowMem, (char*)1, SHM_RND);
+ if (addr == SHMERRORPTR) {
+ xf86DrvMsg(pInt->scrnIndex, X_ERROR, "Cannot shmat() low memory\n");
+ return FALSE;
+ }
+
+ if (((linuxInt10Priv*)pInt->private)->highMem >= 0) {
+ addr = shmat(((linuxInt10Priv*)pInt->private)->highMem,
+ (char*)HIGH_MEM, 0);
+ if (addr == SHMERRORPTR) {
+ xf86DrvMsg(pInt->scrnIndex, X_ERROR,
+ "Cannot shmat() high memory\n");
+ return FALSE;
+ }
+ } else {
+ if ((fd = open(DEV_MEM, O_RDWR, 0)) >= 0) {
+ if (mmap((void *)(V_BIOS), SYS_BIOS - V_BIOS,
+ PROT_READ | PROT_WRITE | PROT_EXEC,
+ MAP_SHARED | MAP_FIXED, fd, V_BIOS)
+ == MAP_FAILED) {
+ xf86DrvMsg(pInt->scrnIndex, X_ERROR, "Cannot map V_BIOS\n");
+ close (fd);
+ return FALSE;
+ }
+ } else {
+ xf86DrvMsg(pInt->scrnIndex, X_ERROR, "Cannot open %s\n",DEV_MEM);
+ return FALSE;
+ }
+ close (fd);
+ }
+
+ return TRUE;
+}
+
+void
+xf86FreeInt10(xf86Int10InfoPtr pInt)
+{
+ if (!pInt)
+ return;
+
+#ifdef _PC
+ xf86Int10SaveRestoreBIOSVars(pInt, FALSE);
+#endif
+ if (Int10Current == pInt) {
+ shmdt(0);
+ if (((linuxInt10Priv*)pInt->private)->highMem >= 0)
+ shmdt((char*)HIGH_MEM);
+ else
+ munmap((pointer)V_BIOS, (SYS_BIOS - V_BIOS));
+ Int10Current = NULL;
+ }
+
+ if (((linuxInt10Priv*)pInt->private)->base_high)
+ shmdt(((linuxInt10Priv*)pInt->private)->base_high);
+ shmdt(((linuxInt10Priv*)pInt->private)->base);
+ shmctl(((linuxInt10Priv*)pInt->private)->lowMem, IPC_RMID, NULL);
+ if (((linuxInt10Priv*)pInt->private)->highMem >= 0)
+ shmctl(((linuxInt10Priv*)pInt->private)->highMem, IPC_RMID, NULL);
+ xfree(((linuxInt10Priv*)pInt->private)->alloc);
+ xfree(pInt->private);
+ xfree(pInt);
+}
+
+void *
+xf86Int10AllocPages(xf86Int10InfoPtr pInt, int num, int *off)
+{
+ int pagesize = getpagesize();
+ int num_pages = ALLOC_ENTRIES(pagesize);
+ int i, j;
+
+ for (i = 0; i < (num_pages - num); i++) {
+ if (((linuxInt10Priv*)pInt->private)->alloc[i] == 0) {
+ for (j = i; j < (num + i); j++)
+ if ((((linuxInt10Priv*)pInt->private)->alloc[j] != 0))
+ break;
+ if (j == (num + i))
+ break;
+ else
+ i = i + num;
+ }
+ }
+ if (i == (num_pages - num))
+ return NULL;
+
+ for (j = i; j < (i + num); j++)
+ ((linuxInt10Priv*)pInt->private)->alloc[j] = 1;
+
+ *off = (i + 1) * pagesize;
+
+ return ((linuxInt10Priv*)pInt->private)->base + ((i + 1) * pagesize);
+}
+
+void
+xf86Int10FreePages(xf86Int10InfoPtr pInt, void *pbase, int num)
+{
+ int pagesize = getpagesize();
+ int first = (((unsigned long)pbase
+ - (unsigned long)((linuxInt10Priv*)pInt->private)->base)
+ / pagesize) - 1;
+ int i;
+
+ for (i = first; i < (first + num); i++)
+ ((linuxInt10Priv*)pInt->private)->alloc[i] = 0;
+}
+
+static CARD8
+read_b(xf86Int10InfoPtr pInt, int addr)
+{
+ return *((CARD8 *)(memType)addr);
+}
+
+static CARD16
+read_w(xf86Int10InfoPtr pInt, int addr)
+{
+ return *((CARD16 *)(memType)addr);
+}
+
+static CARD32
+read_l(xf86Int10InfoPtr pInt, int addr)
+{
+ return *((CARD32 *)(memType)addr);
+}
+
+static void
+write_b(xf86Int10InfoPtr pInt, int addr, CARD8 val)
+{
+ *((CARD8 *)(memType)addr) = val;
+}
+
+static void
+write_w(xf86Int10InfoPtr pInt, int addr, CARD16 val)
+{
+ *((CARD16 *)(memType)addr) = val;
+}
+
+static
+void write_l(xf86Int10InfoPtr pInt, int addr, CARD32 val)
+{
+ *((CARD32 *)(memType) addr) = val;
+}
+
+pointer
+xf86int10Addr(xf86Int10InfoPtr pInt, CARD32 addr)
+{
+ if (addr < V_RAM)
+ return ((linuxInt10Priv*)pInt->private)->base + addr;
+ else if (addr < V_BIOS)
+ return (pointer)(memType)addr;
+ else if (addr < SYS_BIOS) {
+ if (((linuxInt10Priv*)pInt->private)->base_high)
+ return (pointer)(((linuxInt10Priv*)pInt->private)->base_high
+ - V_BIOS + addr);
+ else
+ return (pointer) (memType)addr;
+ } else
+ return (pointer) (memType)addr;
+}
+
+#if defined DoSubModules
+
+static Bool
+vm86_tst(void)
+{
+ int __res;
+
+#ifdef __PIC__
+ /* When compiling with -fPIC, we can't use asm constraint "b" because
+ %ebx is already taken by gcc. */
+ __asm__ __volatile__("pushl %%ebx\n\t"
+ "movl %2,%%ebx\n\t"
+ "movl %1,%%eax\n\t"
+ "int $0x80\n\t"
+ "popl %%ebx"
+ :"=a" (__res)
+ :"n" ((int)113), "r" (NULL));
+#else
+ __asm__ __volatile__("int $0x80\n\t"
+ :"=a" (__res):"a" ((int)113),
+ "b" ((struct vm86_struct *)NULL));
+#endif
+
+ if (__res < 0 && __res == -ENOSYS)
+ return FALSE;
+
+ return TRUE;
+}
+
+static Int10LinuxSubModuleState
+int10LinuxLoadSubModule(ScrnInfoPtr pScrn)
+{
+ if (vm86_tst()) {
+ if (xf86LoadSubModule(pScrn,"vm86"))
+ return INT10_LOADED_VM86;
+ }
+ if (xf86LoadSubModule(pScrn,"x86emu"))
+ return INT10_LOADED_X86EMU;
+
+ return INT10_LOAD_FAILED;
+}
+
+#endif /* DoSubModules */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 09:49:50 +0000