On 2008-02-05 09:48 Roman Kononov said the following: > On 2008-02-05 00:48 yhlu said the following: >> On Feb 4, 2008 9:29 PM, Roman Kononov <[EMAIL PROTECTED]> wrote: >>> I have difficulty cold-resetting Tyan s2912, which has mcp55. >>> >>> The sequence >>> outb(0x2,0xcf9); >>> outb(0x6,0xcf9); >>> is a warm reset. It does not reset the HyperTransport link frequency and >>> width. >> how do you know? >> >> do you have other co-processor or htx installed? > > I have a co-processor. > > The sequence I hope to have: > > 1) Power up. Power-on reset. The co-processor takes long time to become > alive (~500s). By this time the CPU thinks that the HT link is dead.
~0.5s here. > 2) CPU issues another reset. > 3) The CPU re-initializes the HT link and the connection is happy. > > With the above sequence, the step 3) is a warm reset, and the CPU does > not attempt to re-initialize the link. > >> YH > > Roman > -- coreboot mailing list coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
