ADLO 440bx loader patch - coreboot

1 May 2003


      This patch enables booting of ADLO on a 440bx chipset.
cd to freebios/util/ADLO and do a 'patch < loader_440bx.diff'
-- 
Richard A. Smith
rsmith@bitworks.com


*** ../../../freebios_cvs/util/ADLO/loader.s	Sun Nov 24 20:07:53 2002
--- loader.s	Thu May  1 13:52:46 2003
***************
*** 47,62 ****
  ;*****************************************************
  nop
  nop
  ;*****************************************************
  ; B) shadow - ON (enable/read/write)

! mov eax, #0x80000070
! mov dx,  #0x0cf8
! out dx,  eax
! 
! mov eax, #0xFFFFFFFF
! mov dx,  #0x0cfc
! out dx,  eax

  ;*****************************************************
  nop
--- 47,99 ----
  ;*****************************************************
  nop
  nop
+ 
+ ; Outputs a value to PCI config space
+ ; put the bus,dev,function,offset in eax
+ ; and the byte value in dl then call this macro
+ 
+ MACRO PCI_CONFIG_WRITE_BYTE
+    shl edx, #8
+    mov dl,  al
+    and dl,  #3
+    shl edx, #16
+    or  eax, #0x80000000
+    and eax, #0xfffffffc
+    mov dx,  #0x0cf8
+    out dx,  eax
+    shr edx, #16
+    mov al,  dh
+    mov dh,  #0
+    add edx, #0x0cfc
+    out dx,  al
+ MEND
+ 
  ;*****************************************************
  ; B) shadow - ON (enable/read/write)

! ; This is orginal shadowing setup code
! ; Works on the Matsonic 7308e mainboard
! ;mov eax, #0x80000070
! ;mov dx,  #0x0cf8
! ;out dx,  eax
! 
! ;mov eax, #0xFFFFFFFF
! ;mov dx,  #0x0cfc
! ;out dx,  eax
! 
! ; This enables read/write shadowing for the 0x0f0000 -
! ; 0x0fffff range and the 0x0C0000 - 0x0cffff range
! ; for the 440bx chipset.  
! 
! mov eax, #0x59
! mov edx, #0x30
! PCI_CONFIG_WRITE_BYTE
! mov eax, #0x5A
! mov edx, #0x33
! PCI_CONFIG_WRITE_BYTE
! mov eax, #0x5b
! mov edx, #0x33
! PCI_CONFIG_WRITE_BYTE

  ;*****************************************************
  nop