[HVM] [Firmware] Pick up SMBIOS entry point from 0x9f000 in ROMBIOS. This is
needed so that the entry point can be found on a 16-byte boundary in
0xf0000-0xfffff.
Signed-off-by: Andrew D. Ball <aball@xxxxxxxxxx>
diff -r f91cc71173c5 tools/firmware/rombios/rombios.c
--- a/tools/firmware/rombios/rombios.c Thu Jun 22 20:37:33 2006
+++ b/tools/firmware/rombios/rombios.c Fri Jul 7 13:48:13 2006
@@ -9443,6 +9443,43 @@
mov ds, ax
ret
+#ifdef HVMASSIST
+
+smbios_init:
+ push ax
+ push cx
+ push es
+ push ds
+ push di
+ push si
+
+ ; If we have SMBIOS data, it will be at address 0x9f000, and this
+ ; will copy it to the entry point address (smbios_entry_point).
+ ; This will still copy the memory over if we don't, but that shouldn't
+ ; hurt anything, as that memory won't have the '_SM_' signature.
+ mov cx, #0x001f ; 0x1f bytes to copy
+ mov ax, #0xf000
+ mov es, ax ; destination segment is 0xf0000
+ mov di, smbios_entry_point ; destination offset
+ mov ax, #0x9f00
+ mov ds, ax ; source segment is 0x9f000
+ mov si, #0x0000 ; source offset is 0
+ cld
+ rep
+ movsb
+
+smbios_out:
+ pop si
+ pop di
+ pop ds
+ pop es
+ pop cx
+ pop ax
+
+ ret
+
+#endif
+
;; for 'C' strings and other data, insert them here with
;; a the following hack:
;; DATA_SEG_DEFS_HERE
@@ -9724,6 +9761,7 @@
#ifdef HVMASSIST
call _copy_e820_table
+ call smbios_init
#endif
call rom_scan
@@ -10834,4 +10872,11 @@
db 0,0,0,0 ;; MP feature bytes 2-5.
#endif
+; space for SMBIOS entry point (31 bytes)
+.align 16
+smbios_entry_point:
+db 0,0,0,0,0,0,0,0,0,0
+db 0,0,0,0,0,0,0,0,0,0
+db 0,0,0,0,0,0,0,0,0,0,0
+
ASM_END
smbios_4_rombios.patch
Description: Text Data
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