Hello,
this patch adds following options, for the use of OEM ROM section,
eg: onboard PCI device's BIOS in boot ROM or MAC address saved in boot ROM
ROM_TOTAL_SIZE: the total size of boot ROM
ROM_OEM_SIZE: the size of boot ROM used by OEM_ROM section
ROM_SIZE: the size of boot ROM used by LinuxBIOS
ROM_OEM_START: OEM_ROM start address
OEM ROM exists in the low address end of boot ROM, so
default ROM_OEM_SIZE = 0
default ROM_SIZE = ROM_TOTAL_SIZE - ROM_OEM_SIZE
default ROM_OEM_START = 0xffffffff - ROM_TOTAL_SIZE + 1
OEM devices should know the offset of their data in OEM ROM,
so they can visit their data at address (ROM_OEM_START + oem_my_data_offset)
to use OEM ROM, one should define ROM_TOTAL_SIZE and ROM_OEM_SIZE
in mainboard's Options.lb file.
this patch won't break mainboards which defines ROM_SIZE and don't mentions
ROM_TOTAL_SIZE and ROM_OEM_SIZE.
--- freebios2-20050305-0000-orig/src/config/Options.lb 2005-01-15
05:54:16.000000000 +0800
+++ freebios2-20050305-0000/src/config/Options.lb 2005-03-30
20:49:16.000000000 +0800
@@ -190,11 +190,29 @@
export used
comment "Default fallback image size"
end
-define ROM_SIZE
+define ROM_TOTAL_SIZE
default none
format "0x%x"
export used
- comment "Size of your ROM"
+ comment "Size of your boot ROM"
+end
+define ROM_OEM_SIZE
+ default 0
+ format "0x%x"
+ export used
+ comment "Size of your ROM used by OEM vendors"
+end
+define ROM_OEM_START
+ default {0xffffffff - ROM_TOTAL_SIZE + 1}
+ format "0x%x"
+ export used
+ comment "OEM ROM start location"
+end
+define ROM_SIZE
+ default {ROM_TOTAL_SIZE - ROM_OEM_SIZE}
+ format "0x%x"
+ export used
+ comment "Size of your ROM used by LinuxBIOS"
end
define ROM_IMAGE_SIZE
default 65535
--
Liu Tao
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