[coreboot] BIOS RAM in AMD SB7XX southbridges ?

2009-10-27 Thread Darmawan Salihun
What is the BIOS RAM in AMD SB7XX used for? Is it to buffer the BIOS contents from SPI flash chip prior to execution of the very first instruction? I recall that it's impossible to execute code directly in an SPI chip. or am I missing something? -- Regards, Darmawan Salihun ---

Re: [coreboot] BIOS RAM in AMD SB7XX southbridges ?

2009-10-27 Thread David Hendricks
On Tue, Oct 27, 2009 at 6:06 AM, Darmawan Salihun < darmawan.sali...@gmail.com> wrote: > What is the BIOS RAM in AMD SB7XX used for? > Looks like scratchpad memory to me. From the public doc : 3.3 BIOS RAM The SB700 has 256 bytes of B

Re: [coreboot] BIOS RAM in AMD SB7XX southbridges ?

2009-10-27 Thread Gregg Levine
On Tue, Oct 27, 2009 at 4:51 PM, David Hendricks wrote: > On Tue, Oct 27, 2009 at 6:06 AM, Darmawan Salihun > wrote: >> >> What is the BIOS RAM in AMD SB7XX used for? > > Looks like scratchpad memory to me. From the public doc: > > 3.3 BIOS RAM > The SB700 has 256 bytes of BIOS RAM. Data in this

Re: [coreboot] BIOS RAM in AMD SB7XX southbridges ?

2009-10-27 Thread David Hendricks
On Tue, Oct 27, 2009 at 2:04 PM, Gregg Levine wrote: > On Tue, Oct 27, 2009 at 4:51 PM, David Hendricks > wrote: > > On Tue, Oct 27, 2009 at 6:06 AM, Darmawan Salihun > > wrote: > >> > >> What is the BIOS RAM in AMD SB7XX used for? > > > > Looks like scratchpad memory to me. From the public doc:

Re: [coreboot] BIOS RAM in AMD SB7XX southbridges ?

2009-10-27 Thread Carl-Daniel Hailfinger
On 27.10.2009 21:51, David Hendricks wrote: > On Tue, Oct 27, 2009 at 6:06 AM, Darmawan Salihun wrote >> What is the BIOS RAM in AMD SB7XX used for? >> > > Looks like scratchpad memory to me. From the public > doc > : > > 3.3 BIOS R

Re: [coreboot] BIOS RAM in AMD SB7XX southbridges ?

2009-10-27 Thread Carl-Daniel Hailfinger
On 27.10.2009 14:06, Darmawan Salihun wrote: > What is the BIOS RAM in AMD SB7XX used for? > > Is it to buffer the BIOS contents from SPI flash chip prior to > execution of the very first instruction? > No. > I recall that it's impossible to execute code directly in an SPI chip. > Yes, bu

Re: [coreboot] BIOS RAM in AMD SB7XX southbridges ?

2009-10-27 Thread Darmawan Salihun
On 10/28/09, Carl-Daniel Hailfinger wrote: > On 27.10.2009 14:06, Darmawan Salihun wrote: >> What is the BIOS RAM in AMD SB7XX used for? >> >> Is it to buffer the BIOS contents from SPI flash chip prior to >> execution of the very first instruction? >> > > No. > > >> I recall that it's impossible

Re: [coreboot] BIOS RAM in AMD SB7XX southbridges ?

2009-10-28 Thread Andriy Gapon
on 28/10/2009 06:55 Darmawan Salihun said the following: > On 10/28/09, Carl-Daniel Hailfinger wrote: >> On 27.10.2009 14:06, Darmawan Salihun wrote: >>> What is the BIOS RAM in AMD SB7XX used for? >>> >>> Is it to buffer the BIOS contents from SPI flash chip prior to >>> execution of the very fir

Re: [coreboot] BIOS RAM in AMD SB7XX southbridges ?

2009-10-29 Thread Peter Stuge
Darmawan Salihun wrote: > What is the BIOS RAM in AMD SB7XX used for? It will for example be used to store RAM configuration parameters when the system is suspended. > Is it to buffer the BIOS contents from SPI flash chip prior to > execution of the very first instruction? No. > I recall that