intel: Use CF9 reset (part 2)

Make use of the common CF9 reset in SOC_INTEL_COMMON_RESET. Also
implement board_reset() as a "full reset" (aka. cold reset) as that
is what was used here for hard_reset().

Drop soc_reset_prepare() thereby, as it was only used for APL. Also,
move the global-reset logic.

We leave some comments to remind us that a system_reset() should
be enough, where a full_reset() is called now (to retain current
behaviour) and looks suspicious.

Note, as no global_reset() is implemented for Denverton-NS, we halt
there now instead of issuing a non-global reset. This seems safer;
a non-global reset might result in a reset loop.

Change-Id: I5e7025c3c9ea6ded18e72037412b60a1df31bd53
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/29169
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/drivers/intel/fsp1_1/romstage.c b/src/drivers/intel/fsp1_1/romstage.c
index 8e8c24c..e1910e6 100644
--- a/src/drivers/intel/fsp1_1/romstage.c
+++ b/src/drivers/intel/fsp1_1/romstage.c
@@ -22,6 +22,7 @@
 #include <assert.h>
 #include <console/console.h>
 #include <cbmem.h>
+#include <cf9_reset.h>
 #include <cpu/intel/microcode.h>
 #include <cpu/x86/mtrr.h>
 #include <ec/google/chromeec/ec.h>
@@ -29,7 +30,6 @@
 #include <elog.h>
 #include <fsp/romstage.h>
 #include <mrc_cache.h>
-#include <reset.h>
 #include <program_loading.h>
 #include <romstage_handoff.h>
 #include <smbios.h>
@@ -134,7 +134,8 @@
 			printk(BIOS_DEBUG,
 			       "No MRC cache found in S3 resume path.\n");
 			post_code(POST_RESUME_FAILURE);
-			hard_reset();
+			/* FIXME: A "system" reset is likely enough: */
+			full_reset();
 		} else {
 			printk(BIOS_DEBUG, "No MRC cache found.\n");
 		}
@@ -164,7 +165,8 @@
 	/* Create romstage handof information */
 	if (romstage_handoff_init(
 			params->power_state->prev_sleep_state == ACPI_S3) < 0)
-		hard_reset();
+		/* FIXME: A "system" reset is likely enough: */
+		full_reset();
 }
 
 void after_cache_as_ram_stage(void)