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Diffstat (limited to 'hw/xfree86/int10/helper_mem.c')
-rw-r--r--hw/xfree86/int10/helper_mem.c333
1 files changed, 333 insertions, 0 deletions
diff --git a/hw/xfree86/int10/helper_mem.c b/hw/xfree86/int10/helper_mem.c
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index 000000000..6de89c5d9
--- /dev/null
+++ b/hw/xfree86/int10/helper_mem.c
@@ -0,0 +1,333 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/int10/helper_mem.c,v 1.26 2002/11/25 14:05:01 eich Exp $ */
+/*
+ * XFree86 int10 module
+ * execute BIOS int 10h calls in x86 real mode environment
+ * Copyright 1999 Egbert Eich
+ */
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "xf86_ansic.h"
+#include "compiler.h"
+#include "xf86Pci.h"
+#define _INT10_PRIVATE
+#if 0
+#include "int10Defines.h"
+#endif
+#include "xf86int10.h"
+
+#define REG pInt
+
+typedef enum {
+ OPT_NOINT10,
+ OPT_INIT_PRIMARY,
+ OPT_BIOS_LOCATION
+} INT10Opts;
+
+static const OptionInfoRec INT10Options[] = {
+ {OPT_NOINT10, "NoINT10", OPTV_BOOLEAN, {0}, FALSE },
+ {OPT_INIT_PRIMARY, "InitPrimary", OPTV_BOOLEAN, {0}, FALSE },
+ {OPT_BIOS_LOCATION, "BiosLocation", OPTV_STRING, {0}, FALSE },
+ { -1, NULL, OPTV_NONE, {0}, FALSE },
+};
+
+#ifdef DEBUG
+void
+dprint(unsigned long start, unsigned long size)
+{
+ int i,j;
+ char *c = (char *)start;
+
+ for (j = 0; j < (size >> 4); j++) {
+ char *d = c;
+ ErrorF("\n0x%lx: ",(unsigned long)c);
+ for (i = 0; i<16; i++)
+ ErrorF("%2.2x ",(unsigned char) (*(c++)));
+ c = d;
+ for (i = 0; i<16; i++) {
+ ErrorF("%c",((((CARD8)(*c)) > 32) && (((CARD8)(*c)) < 128)) ?
+ (unsigned char) (*(c)): '.');
+ c++;
+ }
+ }
+ ErrorF("\n");
+}
+#endif
+
+#ifndef _PC
+/*
+ * here we are really paranoid about faking a "real"
+ * BIOS. Most of this information was pulled from
+ * dosemu.
+ */
+void
+setup_int_vect(xf86Int10InfoPtr pInt)
+{
+ int i;
+
+ /* let the int vects point to the SYS_BIOS seg */
+ for (i = 0; i < 0x80; i++) {
+ MEM_WW(pInt, i << 2, 0);
+ MEM_WW(pInt, (i << 2) + 2, SYS_BIOS >> 4);
+ }
+
+ reset_int_vect(pInt);
+ /* font tables default location (int 1F) */
+ MEM_WW(pInt,0x1f<<2,0xfa6e);
+
+ /* int 11 default location (Get Equipment Configuration) */
+ MEM_WW(pInt, 0x11 << 2, 0xf84d);
+ /* int 12 default location (Get Conventional Memory Size) */
+ MEM_WW(pInt, 0x12 << 2, 0xf841);
+ /* int 15 default location (I/O System Extensions) */
+ MEM_WW(pInt, 0x15 << 2, 0xf859);
+ /* int 1A default location (RTC, PCI and others) */
+ MEM_WW(pInt, 0x1a << 2, 0xff6e);
+ /* int 05 default location (Bound Exceeded) */
+ MEM_WW(pInt, 0x05 << 2, 0xff54);
+ /* int 08 default location (Double Fault) */
+ MEM_WW(pInt, 0x08 << 2, 0xfea5);
+ /* int 13 default location (Disk) */
+ MEM_WW(pInt, 0x13 << 2, 0xec59);
+ /* int 0E default location (Page Fault) */
+ MEM_WW(pInt, 0x0e << 2, 0xef57);
+ /* int 17 default location (Parallel Port) */
+ MEM_WW(pInt, 0x17 << 2, 0xefd2);
+ /* fdd table default location (int 1e) */
+ MEM_WW(pInt, 0x1e << 2, 0xefc7);
+
+ /* Set Equipment flag to VGA */
+ i = MEM_RB(pInt, 0x0410) & 0xCF;
+ MEM_WB(pInt, 0x0410, i);
+ /* XXX Perhaps setup more of the BDA here. See also int42(0x00). */
+}
+#endif
+
+int
+setup_system_bios(void *base_addr)
+{
+ char *base = (char *) base_addr;
+
+ /*
+ * we trap the "industry standard entry points" to the BIOS
+ * and all other locations by filling them with "hlt"
+ * TODO: implement hlt-handler for these
+ */
+ memset(base, 0xf4, 0x10000);
+
+ /* set bios date */
+ strcpy(base + 0x0FFF5, "06/11/99");
+ /* set up eisa ident string */
+ strcpy(base + 0x0FFD9, "PCI_ISA");
+ /* write system model id for IBM-AT */
+ *((unsigned char *)(base + 0x0FFFE)) = 0xfc;
+
+ return 1;
+}
+
+void
+reset_int_vect(xf86Int10InfoPtr pInt)
+{
+ /*
+ * This table is normally located at 0xF000:0xF0A4. However, int 0x42,
+ * function 0 (Mode Set) expects it (or a copy) somewhere in the bottom
+ * 64kB. Note that because this data doesn't survive POST, int 0x42 should
+ * only be used during EGA/VGA BIOS initialisation.
+ */
+ static const CARD8 VideoParms[] = {
+ /* Timing for modes 0x00 & 0x01 */
+ 0x38, 0x28, 0x2d, 0x0a, 0x1f, 0x06, 0x19, 0x1c,
+ 0x02, 0x07, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
+ /* Timing for modes 0x02 & 0x03 */
+ 0x71, 0x50, 0x5a, 0x0a, 0x1f, 0x06, 0x19, 0x1c,
+ 0x02, 0x07, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
+ /* Timing for modes 0x04, 0x05 & 0x06 */
+ 0x38, 0x28, 0x2d, 0x0a, 0x7f, 0x06, 0x64, 0x70,
+ 0x02, 0x01, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00,
+ /* Timing for mode 0x07 */
+ 0x61, 0x50, 0x52, 0x0f, 0x19, 0x06, 0x19, 0x19,
+ 0x02, 0x0d, 0x0b, 0x0c, 0x00, 0x00, 0x00, 0x00,
+ /* Display page lengths in little endian order */
+ 0x00, 0x08, /* Modes 0x00 and 0x01 */
+ 0x00, 0x10, /* Modes 0x02 and 0x03 */
+ 0x00, 0x40, /* Modes 0x04 and 0x05 */
+ 0x00, 0x40, /* Modes 0x06 and 0x07 */
+ /* Number of columns for each mode */
+ 40, 40, 80, 80, 40, 40, 80, 80,
+ /* CGA Mode register value for each mode */
+ 0x2c, 0x28, 0x2d, 0x29, 0x2a, 0x2e, 0x1e, 0x29,
+ /* Padding */
+ 0x00, 0x00, 0x00, 0x00
+ };
+ int i;
+
+ for (i = 0; i < sizeof(VideoParms); i++)
+ MEM_WB(pInt, i + (0x1000 - sizeof(VideoParms)), VideoParms[i]);
+ MEM_WW(pInt, 0x1d << 2, 0x1000 - sizeof(VideoParms));
+ MEM_WW(pInt, (0x1d << 2) + 2, 0);
+
+ MEM_WW(pInt, 0x10 << 2, 0xf065);
+ MEM_WW(pInt, (0x10 << 2) + 2, SYS_BIOS >> 4);
+ MEM_WW(pInt, 0x42 << 2, 0xf065);
+ MEM_WW(pInt, (0x42 << 2) + 2, SYS_BIOS >> 4);
+ MEM_WW(pInt, 0x6D << 2, 0xf065);
+ MEM_WW(pInt, (0x6D << 2) + 2, SYS_BIOS >> 4);
+}
+
+void
+set_return_trap(xf86Int10InfoPtr pInt)
+{
+ /*
+ * Here we set the exit condition: We return when we encounter
+ * 'hlt' (=0xf4), which we locate at address 0x600 in x86 memory.
+ */
+ MEM_WB(pInt, 0x0600, 0xf4);
+
+ /*
+ * Allocate a segment for the stack
+ */
+ xf86Int10AllocPages(pInt, 1, &pInt->stackseg);
+}
+
+void *
+xf86HandleInt10Options(ScrnInfoPtr pScrn, int entityIndex)
+{
+ EntityInfoPtr pEnt = xf86GetEntityInfo(entityIndex);
+ OptionInfoPtr options = NULL;
+
+ if (pEnt->device) {
+ pointer configOptions = NULL;
+
+ /* Check if xf86CollectOptions() has already been called */
+ if (((pEnt->index < 0) ||
+ !pScrn ||
+ !(configOptions = pScrn->options)) &&
+ pEnt->device)
+ configOptions = pEnt->device->options;
+
+ if (configOptions) {
+ if (!(options = (OptionInfoPtr) xalloc(sizeof(INT10Options))))
+ return NULL;
+
+ (void)memcpy(options, INT10Options, sizeof(INT10Options));
+ xf86ProcessOptions(pScrn->scrnIndex, configOptions, options);
+ }
+ }
+ xfree(pEnt);
+
+ return options;
+}
+
+Bool
+int10skip(void* options)
+{
+ Bool noint10 = FALSE;
+
+ if (!options) return FALSE;
+
+ xf86GetOptValBool(options, OPT_NOINT10, &noint10);
+ return noint10;
+}
+
+Bool
+int10_check_bios(int scrnIndex, int codeSeg, unsigned char* vbiosMem)
+{
+ int size;
+
+ if ((codeSeg & 0x1f) || /* Not 512-byte aligned otherwise */
+ ((codeSeg << 4) < V_BIOS) ||
+ ((codeSeg << 4) >= SYS_SIZE))
+ return FALSE;
+
+ if (xf86IsPc98())
+ return FALSE;
+
+ if ((*vbiosMem != 0x55) || (*(vbiosMem+1) != 0xAA) || !*(vbiosMem+2))
+ return FALSE;
+
+ size = *(vbiosMem + 2) * 512;
+
+ if ((size + (codeSeg << 4)) > SYS_SIZE)
+ return FALSE;
+
+ if (bios_checksum(vbiosMem, size))
+ xf86DrvMsg(scrnIndex, X_WARNING, "Bad V_BIOS checksum\n");
+
+ return TRUE;
+}
+
+Bool
+initPrimary(void* options)
+{
+ Bool initPrimary = FALSE;
+
+ if (!options) return FALSE;
+
+ xf86GetOptValBool(options, OPT_INIT_PRIMARY, &initPrimary);
+ return initPrimary;
+}
+
+/*
+ * xf86int10ParseBiosLocation(): allows to set the location of the
+ * BIOS. One may select a BIOS of another card for posting or the
+ * legacy V_BIOS range located at 0xc0000 or an alternative address
+ * (BUS_ISA).
+ * This is only useful under very special circumstances and should
+ * be used with extreme care.
+ */
+void
+xf86int10ParseBiosLocation(void* options,
+ xf86int10BiosLocationPtr bios)
+{
+ char *s;
+ char *p;
+ char *str = NULL;
+
+ if (options)
+ str = xf86GetOptValString(options,OPT_BIOS_LOCATION);
+
+ bios->bus = BUS_NONE;
+ if (!str)
+ return;
+
+ s = xstrdup(str);
+ p = strtok(s,":");
+ if (xf86NameCmp(p,"pci") == 0) bios->bus = BUS_PCI;
+ else
+ if (xf86NameCmp(p,"primary") == 0) bios->bus = BUS_ISA;
+
+ xfree(s);
+
+ if (bios->bus == BUS_NONE) return;
+
+ s = xstrdup(str);
+ p = strchr(s, ':');
+
+ switch (bios->bus) {
+ case BUS_ISA:
+ if (p)
+ bios->location.legacy = atoi(++p);
+ else
+ bios->location.legacy = 0;
+ break;
+ case BUS_PCI:
+ if (p) {
+ bios->location.pci.bus = atoi(++p);
+ if ((p = strchr(p, ':'))) {
+ bios->location.pci.dev = atoi(++p);
+ if ((p = strchr(p, ':'))) {
+ bios->location.pci.func = atoi(++p);
+ break;
+ }
+ }
+ }
+ /* fall through */
+ bios->bus = BUS_NONE;
+ break;
+ default:
+ break;
+ }
+ xfree(s);
+}
+
+
+
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