From 01f9aa5e54cf55ecca1b35185373835e61f10615 Mon Sep 17 00:00:00 2001 From: Julius Werner Date: Thu, 18 May 2017 16:03:26 -0700 Subject: Consolidate reset API, add generic reset_prepare mechanism There are many good reasons why we may want to run some sort of generic callback before we're executing a reset. Unfortunateley, that is really hard right now: code that wants to reset simply calls the hard_reset() function (or one of its ill-differentiated cousins) which is directly implemented by a myriad of different mainboards, northbridges, SoCs, etc. More recent x86 SoCs have tried to solve the problem in their own little corner of soc/intel/common, but it's really something that would benefit all of coreboot. This patch expands the concept onto all boards: hard_reset() and friends get implemented in a generic location where they can run hooks before calling the platform-specific implementation that is now called do_hard_reset(). The existing Intel reset_prepare() gets generalized as soc_reset_prepare() (and other hooks for arch, mainboard, etc. can now easily be added later if necessary). We will also use this central point to ensure all platforms flush their cache before reset, which is generally useful for all cases where we're trying to persist information in RAM across reboots (like the new persistent CBMEM console does). Also remove cpu_reset() completely since it's not used anywhere and doesn't seem very useful compared to the others. Change-Id: I41b89ce4a923102f0748922496e1dd9bce8a610f Signed-off-by: Julius Werner Reviewed-on: https://review.coreboot.org/19789 Reviewed-by: Aaron Durbin Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/soc/intel/baytrail/reset.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/soc/intel/baytrail/reset.c') diff --git a/src/soc/intel/baytrail/reset.c b/src/soc/intel/baytrail/reset.c index fd38f61255..e38a2e6ec8 100644 --- a/src/soc/intel/baytrail/reset.c +++ b/src/soc/intel/baytrail/reset.c @@ -29,13 +29,13 @@ void warm_reset(void) outb(RST_CPU | SYS_RST, RST_CNT); } -void soft_reset(void) +void do_soft_reset(void) { /* Sends INIT# to CPU */ outb(RST_CPU, RST_CNT); } -void hard_reset(void) +void do_hard_reset(void) { /* Don't power cycle on hard_reset(). It's not really clear what the * semantics should be for the meaning of hard_reset(). */ -- cgit v1.2.3