vbox的更動 11565 路徑 trunk/src/VBox/Devices/Graphics

時間撮記:

2008-8-22 上午07:39:55 (16 年 以前)

作者:

vboxsync

訊息:

Workaround for bug(s) in the Ubuntu splash screen instruction emulator

檔案:

• trunk/src/VBox/Devices/Graphics/BIOS/vbe.c (修改) (4 筆差異)

trunk/src/VBox/Devices/Graphics/BIOS/vbe.c

@@ -48 +48 @@
 
 // The current OEM Software Revision of this VBE Bios
-#define VBE_OEM_SOFTWARE_REV 0x0002;
+#define VBE_OEM_SOFTWARE_REV 0x0002
 
 extern char vbebios_copyright;
@@ -1106 +1106 @@
 {
         Bit16u            ss=get_SS();
+#ifndef VBOX
         VbeInfoBlock      vbe_info_block;
+#endif
         Bit16u            status;
         Bit16u            result;
@@ -1141 +1143 @@
 
         vbe2_info = 0;
+#ifdef VBOX
+  #define RT_OFFSETOF(type, member)   ( (int)(unsigned)&( ((type *)(void *)0)->member) )
+
+        /* Don't use a local copy of VbeInfoBlock on the stack; it's too big. 
+         * The Ubuntu 8.04 64 bits splash screen emulator can't handle this.
+         */
 #ifdef VBE2_NO_VESA_CHECK
+#else
+        // check for VBE2 signature
+        if (((read_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[0])) == 'V') &&
+             (read_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[1])) == 'B') &&
+             (read_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[2])) == 'E') &&
+             (read_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[3])) == '2')) ||
+
+            ((read_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[0])) == 'V') &&
+             (read_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[1])) == 'E') &&
+             (read_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[2])) == 'S') &&
+             (read_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[3])) == 'A')) )
+        {
+                vbe2_info = 1;
+#ifdef DEBUG
+                printf("VBE correct VESA/VBE2 signature found\n");
+#endif
+        }
+#endif
+
+        // VBE Signature
+        write_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[0]), 'V');
+        write_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[1]), 'E');
+        write_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[2]), 'S');
+        write_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeSignature[3]), 'A');
+
+        // VBE Version supported
+        write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, VbeVersion), 0x0200);
+
+        // OEM String
+        write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, OemStringPtr_Seg), 0xc000);
+        write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, OemStringPtr_Off), &vbebios_copyright);
+
+        // Capabilities
+        write_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, Capabilities[0]), VBE_CAPABILITY_8BIT_DAC);
+        write_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, Capabilities[1]), 0);
+        write_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, Capabilities[2]), 0);
+        write_byte(ES, DI + RT_OFFSETOF(VbeInfoBlock, Capabilities[3]), 0);
+
+        // VBE Video Mode Pointer (dynamicly generated from the mode_info_list)
+        write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, VideoModePtr_Seg), ES);
+        write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, VideoModePtr_Off), DI + 34);
+
+        // VBE Total Memory (in 64b blocks)
+        write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, TotalMemory), in_word(VBE_EXTRA_PORT, 0xffff));
+
+        if (vbe2_info)
+        {
+                // OEM Stuff
+                write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, OemSoftwareRev), VBE_OEM_SOFTWARE_REV);
+                write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, OemVendorNamePtr_Seg), 0xc000);
+                write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, OemVendorNamePtr_Off), &vbebios_vendor_name);
+                write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, OemProductNamePtr_Seg), 0xc000);
+                write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, OemProductNamePtr_Off), &vbebios_product_name);
+                write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, OemProductRevPtr_Seg), 0xc000);
+                write_word(ES, DI + RT_OFFSETOF(VbeInfoBlock, OemProductRevPtr_Off), &vbebios_product_revision);
+        }
 #else
         // get vbe_info_block into local variable
         memcpyb(ss, &vbe_info_block, ES, DI, sizeof(vbe_info_block));
 
+#ifdef VBE2_NO_VESA_CHECK
+#else
         // check for VBE2 signature
         if (((vbe_info_block.VbeSignature[0] == 'V') &&
@@ -1209 +1275 @@
                 memcpyb(ES, DI, ss, &vbe_info_block, 256);
         }
+#endif /* VBOX */
 
 #ifdef VBE_NEW_DYN_LIST