summaryrefslogtreecommitdiff
path: root/src/arch/x86/exit_car.S
AgeCommit message (Collapse)Author
2016-09-19arch/x86: move postcar main logic into CAaron Durbin
The console_init(), MTRR printing, and loading ramstage logic was previously all in assembly. Move that logic into C code so that future features can more easily be added into the postcar boot flow. BUG=chrome-os-partner:57513 Change-Id: I332140f569caf0803570fd635d894295de8c0018 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/16618 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Andrey Petrov <andrey.petrov@intel.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2016-08-01arch/x86: Enable postcar consoleLee Leahy
Add a Kconfig value to enable the console during postcar. Add a call to console_init at the beginning of the postcar stage in exit_car.S. TEST=Build and run on Galileo Gen2 Change-Id: I66e2ec83344129ede2c7d6e5627c8062e28f50ad Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com> Reviewed-on: https://review.coreboot.org/16001 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2016-08-01arch/x86: Display MTRRs after MTRR update in postcarLee Leahy
Display the MTRRs after they have been updated during the postcar stage. TEST=Build and run on Galileo Gen2 Change-Id: I1532250cacd363c1eeaf72edc6cb9e9268a11375 Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com> Reviewed-on: https://review.coreboot.org/15991 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-07-27arch/x86: Add bootblock and postcar support for SOC MTRR accessLee Leahy
Quark does not support the rdmsr and wrmsr instructions. Use SOC specific routines to configure the MTRRs on Quark based platforms. Add cpu_common.c as a build dependency to provide access to the routine cpu_phys_address_size. TEST=Build and run on Galileo Gen2 Change-Id: I43b7067c66c5c55b42097937e862078adf17fb19 Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com> Reviewed-on: https://review.coreboot.org/15846 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-03-23arch/x86: introduce postcar stage/phaseAaron Durbin
Certain chipsets don't have a memory-mapped boot media so their code execution for stages prior to DRAM initialization is backed by SRAM or cache-as-ram. The postcar stage/phase handles the cache-as-ram situation where in order to tear down cache-as-ram one needs to be executing out of a backing store that isn't transient. By current definition, cache-as-ram is volatile and tearing it down leads to its contents disappearing. Therefore provide a shim layer, postcar, that's loaded into memory and executed which does 2 things: 1. Tears down cache-as-ram with a chipset helper function. 2. Loads and runs ramstage. Because those 2 things are executed out of ram there's no issue of the code's backing store while executing the code that tears down cache-as-ram. The current implementation makes no assumption regarding cacheability of the DRAM itself. If the chipset code wishes to cache DRAM for loading of the postcar stage/phase then it's also up to the chipset to handle any coherency issues pertaining to cache-as-ram destruction. Change-Id: Ia58efdadd0b48f20cfe7de2f49ab462306c3a19b Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/14140 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Furquan Shaikh <furquan@google.com>