-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello
Following patch flushes the instruction queue when we set PE=0. This is normally done by FAR JMP, but here it is more tricky because we run at EIP>1MB. Many thanks to Marc and Kevin to tell me how to fix it The trick is to use 0x66 prefix (done with ljmpl) it will allow to jump in real mode to any EIP addresses ;) Signed-off-by: Rudolf Marek <[email protected]> Rudolf =================================================================== - --- arch/i386/boot/wakeup.S (revision 4106) +++ arch/i386/boot/wakeup.S (working copy) @@ -45,6 +45,8 @@ movl %cr0, %eax andb $0xfe,%al movl %eax, %cr0 + ljmpl $0x0, $cpu_flushed +cpu_flushed: movw $0x0, %ax movw %ax, %ds movw %ax, %es -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAknjtyIACgkQ3J9wPJqZRNUugwCguIMboaTCW8eUz+JI2RcOanNC zA4An0iflgt3O/3YcJ7hcXBqHUsMSTjZ =Ad2w -----END PGP SIGNATURE----- -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
