On Mon, Oct 17, 2011 at 4:40 AM, Oskar Enoksson <[email protected]> wrote: > On 10/17/2011 04:24 AM, Marc Jones wrote: >> >> On Sun, Oct 16, 2011 at 4:57 AM, Oskar Enoksson<[email protected]> >> wrote: >>> >>> Can someone explain what RAMINIT_SYSINFO configuration option does? I >>> thought I understood, but I don't. >>> >>> /Oskar >> >> Hi Oskar, >> >> RAMINIT_SYSINFO is the config option to create the AMD sysinfo >> structure in CAR above the stack. This is a way to get global data in >> the romstage (heap like without any management). The space for the >> data structure is allocated by the DCACHE_RAM_GLOBAL_VAR_SIZE config >> and the pointer is setup in cache_as_ram_main. > > So setting RAMINIT_SYSINFO enables some functionality that needs that data > in the romstage, e.g. optimize_link_incoherent_ht (?) But what would be the > reason to NOT use RAMINIT_SYSINFO? To save space in the cache?
Yes, and if you had a platform that didn't require it for memory training or other features that use the sysinfo structure. For K8, I recommend that you leave it enabled. Marc -- http://se-eng.com -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
