Changeset 4391 in vbox for trunk

Timestamp:

Aug 27, 2007 5:12:05 PM (17 years ago)

Author:

vboxsync

Message:

Support booting from the Intel PXE ROM.

Location:

trunk/src/VBox/Devices/PC

Files:

• BIOS/rombios.c (modified) (2 diffs)
• DevPcBios.cpp (modified) (1 diff)
• DevPcBios.h (modified) (1 diff)

trunk/src/VBox/Devices/PC/BIOS/rombios.c

@@ -7981 +7981 @@
     if (read_word(VBOX_LANBOOT_SEG,0) == 0xaa55) {
       Bit16u pnpoff;
+      Bit32u manuf;
       // This is NOT a generic PnP implementation, but an Etherboot-specific hack.
       pnpoff = read_word(VBOX_LANBOOT_SEG,0x1a);
-      if (read_dword(VBOX_LANBOOT_SEG,pnpoff) == 0x506e5024 &&
-          read_dword(VBOX_LANBOOT_SEG,read_word(VBOX_LANBOOT_SEG,pnpoff+0xe)) == 0x65687445) {
-        // Found PnP signature and Etherboot manufacturer string.
-        print_boot_device(bootcd, bootlan, bootdrv);
+      if (read_dword(VBOX_LANBOOT_SEG,pnpoff) == 0x506e5024) {
+        // Found PnP signature
+        manuf = read_dword(VBOX_LANBOOT_SEG,read_word(VBOX_LANBOOT_SEG,pnpoff+0xe));
+        if (manuf == 0x65687445) {
+          // Found Etherboot ROM
+          print_boot_device(bootcd, bootlan, bootdrv);
 ASM_START
     push ds
@@ -7996 +7999 @@
     pop ds
 ASM_END
+          } else if (manuf == 0x65746E49) {
+            // Found Intel PXE ROM
+            print_boot_device(bootcd, bootlan, bootdrv);
+ASM_START
+    push ds
+    push es
+    pusha
+    sti     ; Why are interrupts disabled now? Because we were called through an INT!
+    calli 0x0003,VBOX_LANBOOT_SEG
+;    cmp bx,#0x20
+;    jne no_rom
+    push #VBOX_LANBOOT_SEG
+    pop ds
+    mov bx,#0x1a    ; PnP header offset
+    mov bx,[bx]
+    add bx,#0x1a    ; BEV offset in PnP header
+    mov ax,[bx]
+    test ax,ax
+    jz no_rom
+bev_jump:
+    push cs
+    push #no_rom
+    push #VBOX_LANBOOT_SEG
+    push ax
+    retf    ; call Boot Entry Vector
+no_rom:
+    popa
+    pop es
+    pop ds
+ASM_END
+          }
         }
       }

trunk/src/VBox/Devices/PC/DevPcBios.cpp

@@ -1400 +1400 @@
     if (pu8LanBoot)
         rc = PDMDevHlpROMRegister(pDevIns, VBOX_LANBOOT_SEG << 4, cbFileLanBoot, pu8LanBoot, 
-                                  false /* fShadow */, "Net Boot ROM");
+                                  true /* fShadow */, "Net Boot ROM");
 
     rc = CFGMR3QueryU8(pCfgHandle, "DelayBoot", &pData->uBootDelay);

trunk/src/VBox/Devices/PC/DevPcBios.h

@@ -26 +26 @@
 #define VBOX_MPS_TABLE_BASE          0xe1100
 
-#define VBOX_LANBOOT_SEG             0xca00
+#define VBOX_LANBOOT_SEG             0xe200
 
 #endif