[LinuxBIOS] [PATCH v3] v2, v3: Bug in CAR setup with CacheSize!={4k, 8k, 16k}

yhlu yinghailu at gmail.com
Fri Nov 30 08:59:43 CET 2007

my own tree have

#if CacheSize < 0x8000
        /* enable caching for 16K/8K/4K using fixed mtrr */
        movl    $0x269, %ecx  /* fix4k_cc000*/
    #if CacheSize == 0x4000
        movl    $0x06060606, %edx /* WB IO type */
    #if CacheSize == 0x2000
        movl    $0x06060000, %edx /* WB IO type */
    #if CacheSize == 0x1000
        movl    $0x06000000, %edx /* WB IO type */
        xorl    %eax, %eax

maybe i didn't post sth...

normally we can use 4k only at first.

run_time decide is not good. for example REV E, you could use 64k. for
for REV F you can only use 48K.

Family 10h need more tricks.


More information about the coreboot mailing list