[Xen-devel] [PATCH] rombios: fix 32bit gateway

[Kouya Shimura <kouya@xxxxxxxxxxxxxx>]

remove unnecessary function calls.

The rombios always becomes read-only after using 32bit gateway.
That is not handy for using the gateway.

Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx>

diff -r 10a8fae412c5 tools/firmware/rombios/32bitgateway.c
--- a/tools/firmware/rombios/32bitgateway.c     Wed Jan 14 13:43:17 2009 +0000
+++ b/tools/firmware/rombios/32bitgateway.c     Thu Jan 15 18:34:34 2009 +0900
@@ -126,18 +126,18 @@
 gdt_entry_pm_cs:
     ; 32 bit code segment for protected mode
     .word 0xffff, 0x0000
-    .byte 0x00, 0x9a, 0xcf, 0x00
+    .byte 0x00, 0x9b, 0xcf, 0x00
 
 gdt_entry_pm_16bit_cs:
     ; temp. 16 bit code segment used while in protected mode
     .word 0xffff, 0x0000
-    .byte SEGMENT_OFFSET >> 16, 0x9a, 0x0, 0x0
+    .byte SEGMENT_OFFSET >> 16, 0x9b, 0x0, 0x0
 
 gdt_entry_pm_32bit_ds:
     ; (32 bit) data segment (r/w) reaching all possible areas in 32bit memory
     ; 4kb granularity
     .word 0xffff, 0x0000
-    .byte 0x0, 0x92, 0xcf, 0x0
+    .byte 0x0, 0x93, 0xcf, 0x0
 gdt_entry_end:
 
 my_gdtdesc:
@@ -356,9 +356,6 @@
        call _store_returnaddress       ; store away
        pop ax
 
-       ; XXX GDT munging requires ROM to be writable!
-       call _enable_rom_write_access
-
        rol bx, #2
        mov si, #jmptable
        seg cs
@@ -385,8 +382,6 @@
        mov bp,sp
        push eax                        ; preserve work register
 
-       call _disable_rom_write_access
-
        call _get_returnaddress
        mov 2[bp], ax                   ; 16bit return address onto stack
 

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