1 files changed, 191 insertions, 0 deletions
diff --git a/private/ntos/nthals/halsni4x/mips/x86bios.c b/private/ntos/nthals/halsni4x/mips/x86bios.c
new file mode 100644
index 000000000..17cd688aa
--- /dev/null
+++ b/private/ntos/nthals/halsni4x/mips/x86bios.c
@@ -0,0 +1,191 @@
+/*++
+
+Copyright (c) 1994  Microsoft Corporation
+
+Module Name:
+
+    x86bios.c
+
+Abstract:
+
+
+    This module implements the platform specific interface between a device
+    driver and the execution of x86 ROM bios code for the device.
+
+--*/
+
+#include "halp.h"
+
+//
+// Define global data.
+// per default, we enable int10's but we do nort use them on our well known
+// SNI graphic cards
+// if we have an unknown card, we try to initialize it via the emulator and the card
+// bios. if this fails, we disable int10 calls
+//
+
+ULONG HalpX86BiosInitialized = FALSE;
+ULONG HalpEnableInt10Calls = TRUE;
+
+BOOLEAN
+HalCallBios (
+    IN ULONG BiosCommand,
+    IN OUT PULONG Eax,
+    IN OUT PULONG Ebx,
+    IN OUT PULONG Ecx,
+    IN OUT PULONG Edx,
+    IN OUT PULONG Esi,
+    IN OUT PULONG Edi,
+    IN OUT PULONG Ebp
+    )
+
+/*++
+
+Routine Description:
+
+    This function provides the platform specific interface between a device
+    driver and the execution of the x86 ROM bios code for the specified ROM
+    bios command.
+
+Arguments:
+
+    BiosCommand - Supplies the ROM bios command to be emulated.
+
+    Eax to Ebp - Supplies the x86 emulation context.
+
+Return Value:
+
+    A value of TRUE is returned if the specified function is executed.
+    Otherwise, a value of FALSE is returned.
+
+--*/
+
+{
+
+    XM86_CONTEXT Context;
+
+    //
+    // If the X86 BIOS Emulator has not been initialized, then return FALSE.
+    //
+
+    if (HalpX86BiosInitialized == FALSE) {
+        return FALSE;
+    }
+
+    //
+    // If the Video Adapter initialization failed and an Int10 command is
+    // specified, then return FALSE.
+    //
+
+    if (BiosCommand == 0x10){
+
+        if(HalpEnableInt10Calls == FALSE) {
+            return FALSE;
+        }
+
+        //
+        // if Int10 commands are still enabled, Initialize the Card
+        // if it fails, disable Int10's
+        // this should make sense ...
+        //
+
+        if (x86BiosInitializeAdapter(0xc0000, NULL, NULL, NULL) != XM_SUCCESS) {
+            HalpEnableInt10Calls = FALSE;
+            return FALSE;
+        }
+    }
+
+    //
+    // Copy the x86 bios context and emulate the specified command.
+    //
+
+    Context.Eax = *Eax;
+    Context.Ebx = *Ebx;
+    Context.Ecx = *Ecx;
+    Context.Edx = *Edx;
+    Context.Esi = *Esi;
+    Context.Edi = *Edi;
+    Context.Ebp = *Ebp;
+    if (x86BiosExecuteInterrupt((UCHAR)BiosCommand, &Context, NULL, NULL) != XM_SUCCESS) {
+        return FALSE;
+    }
+
+    //
+    // Copy the x86 bios context and return TRUE.
+    //
+
+    *Eax = Context.Eax;
+    *Ebx = Context.Ebx;
+    *Ecx = Context.Ecx;
+    *Edx = Context.Edx;
+    *Esi = Context.Esi;
+    *Edi = Context.Edi;
+    *Ebp = Context.Ebp;
+    return TRUE;
+}
+
+VOID
+HalpResetX86DisplayAdapter(
+    VOID
+    )
+
+/*++
+
+Routine Description:
+
+    This function resets a display adapter using the x86 bios emulator.
+
+Arguments:
+
+    None.
+
+Return Value:
+
+    None.
+
+--*/
+
+{
+
+    XM86_CONTEXT Context;
+
+    //
+    // Initialize the x86 bios context and make the INT 10 call to initialize
+    // the display adapter to 80x50 16 color text mode.
+    // this is done by two int10 calls like on an standard PC
+    // hopefully this works ...
+    // the sample code sets only 80x25 mode, but we want more !!!
+    //
+
+    Context.Eax = 0x0003;  // Function 0, Mode 3
+    Context.Ebx = 0;
+    Context.Ecx = 0;
+    Context.Edx = 0;
+    Context.Esi = 0;
+    Context.Edi = 0;
+    Context.Ebp = 0;
+
+    HalCallBios(0x10,
+                &Context.Eax,
+                &Context.Ebx,
+                &Context.Ecx,
+                &Context.Edx,
+                &Context.Esi,
+                &Context.Edi,
+                &Context.Ebp);
+    //
+    // Now change it to 80x50 8x8Font Mode
+    //
+
+    Context.Eax = 0x1112;  // use 8x8 font (causes 50 line mode)
+    Context.Ebx = 0;
+
+    HalCallBios(0x10,
+                &Context.Eax,
+                &Context.Ebx,
+                &Context.Ecx,
+                &Context.Edx,
+                &Context.Esi,
+                &Context.Edi,
+                &Context.Ebp);
+}