From e58a7c24acc72b57ae87101b936924d7d61dfe91 Mon Sep 17 00:00:00 2001
From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Sun, 23 May 2004 16:28:35 +0000
Subject: int13 cdrom 32 bit register update fix (aka FreeBSD CDROM boot)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@850 c046a42c-6fe2-441c-8c8c-71466251a162
---
 pc-bios/bios.diff | 42 +++++++++++++++++++++++++++++++++++-------
 1 file changed, 35 insertions(+), 7 deletions(-)

(limited to 'pc-bios/bios.diff')

diff --git a/pc-bios/bios.diff b/pc-bios/bios.diff
index dee62e012a..24a22b9bf3 100644
--- a/pc-bios/bios.diff
+++ b/pc-bios/bios.diff
@@ -4,7 +4,7 @@ RCS file: /cvsroot/bochs/bochs/bios/rombios.c,v
 retrieving revision 1.108
 diff -u -w -r1.108 rombios.c
 --- rombios.c	9 Feb 2004 16:48:50 -0000	1.108
-+++ rombios.c	22 May 2004 15:47:51 -0000
++++ rombios.c	23 May 2004 15:48:52 -0000
 @@ -2254,6 +2254,7 @@
        type      = read_byte(get_SS(),buffer+1) & 0x1f;
        removable = (read_byte(get_SS(),buffer+0) & 0x80) ? 1 : 0;
@@ -58,7 +58,35 @@ diff -u -w -r1.108 rombios.c
      }
  
    package_count = mouse_flags_2 & 0x07;
-@@ -8401,57 +8416,69 @@
+@@ -4833,8 +4848,10 @@
+ // ---------------------------------------------------------------------------
+ 
+   void
+-int13_cdrom(DI, SI, BP, SP, BX, DX, CX, AX, DS, ES, FLAGS)
+-  Bit16u DI, SI, BP, SP, BX, DX, CX, AX, DS, ES, FLAGS;
++int13_cdrom(DI, DIH, SI, SIH, BP, BPH, SP, SPH, BX, BXH, DX, DXH, CX, CXH, AX, AXH, 
++            DS, ES, FLAGS)
++  Bit16u DI, DIH, SI, SIH, BP, BPH, SP, SPH, BX, BXH, DX, DXH, CX, CXH, AX, AXH,
++         DS, ES, FLAGS;
+ {
+   Bit16u ebda_seg=read_word(0x0040,0x000E);
+   Bit8u  device, status, locks;
+@@ -7692,9 +7709,12 @@
+   push  ds
+   push  ss
+   pop   ds
+-  pusha
++  // ebx is modified: BSD 5.2.1 boot loader problem, so we save all
++  // the 32 bit registers. It should be done in all the bios or no 32
++  // bit register should be used without saving it first.
++  pushad
+   call  _int13_cdrom
+-  popa
++  popad
+   pop   ds
+   pop   es
+   popf
+@@ -8401,57 +8421,69 @@
    cmp al, #0x08
    jne pci_pro_f09
    call pci_pro_select_reg
@@ -128,7 +156,7 @@ diff -u -w -r1.108 rombios.c
    jmp pci_pro_ok
  pci_pro_unknown:
    mov ah, #0x81
-@@ -8468,6 +8495,7 @@
+@@ -8468,6 +8500,7 @@
    retf
  
  pci_pro_select_reg:
@@ -136,7 +164,7 @@ diff -u -w -r1.108 rombios.c
    mov eax, #0x800000
    mov ax,  bx
    shl eax, #8
-@@ -8476,6 +8504,7 @@
+@@ -8476,6 +8509,7 @@
    and al,  #0xfc
    mov dx, #0x0cf8
    out dx,  eax
@@ -144,7 +172,7 @@ diff -u -w -r1.108 rombios.c
    ret
  
  use16 386
-@@ -8536,57 +8565,69 @@
+@@ -8536,57 +8570,69 @@
    cmp al, #0x08
    jne pci_real_f09
    call pci_real_select_reg
@@ -214,7 +242,7 @@ diff -u -w -r1.108 rombios.c
    jmp pci_real_ok
  pci_real_unknown:
    mov ah, #0x81
-@@ -8599,6 +8640,7 @@
+@@ -8599,6 +8645,7 @@
    ret
  
  pci_real_select_reg:
@@ -222,7 +250,7 @@ diff -u -w -r1.108 rombios.c
    mov eax, #0x800000
    mov ax,  bx
    shl eax, #8
-@@ -8607,6 +8649,7 @@
+@@ -8607,6 +8654,7 @@
    and al,  #0xfc
    mov dx, #0x0cf8
    out dx,  eax
-- 
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