soc/intel/ptl: Do initial Panther Lake SoC commit till romstage

List of changes:
1. Add required SoC programming till romstage
2. Include only required headers into include/soc
3. Fill required FSP-M UPD to call FSP-M API
4. Ref: Processor EDS documents
	Panther Lake U/H 12Xe/H 4Xe External Design
	Specification (EDS) Rev. 0.7, vol 1 of 2 #815002 and
	Volume 2 of 2 #813030

BUG=b:348678529
TEST=Verified on Intel® Simics® Pre Silicon Simulation platform
     for PTL using google/fatcat mainboard.

Change-Id: I27e1a6c56bca01e7f5f53fbf3cb6855bac7b2848
Signed-off-by: Saurabh Mishra <mishra.saurabh@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83635
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jamie Ryu <jamie.m.ryu@intel.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/soc/intel/pantherlake/reset.c b/src/soc/intel/pantherlake/reset.c
new file mode 100644
index 0000000000..bc5815ac7a
--- /dev/null
+++ b/src/soc/intel/pantherlake/reset.c
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <cf9_reset.h>
+#include <intelblocks/cse.h>
+#include <intelblocks/pmclib.h>
+#include <soc/intel/common/reset.h>
+
+void do_global_reset(void)
+{
+	/* Ask CSE to do the global reset */
+	if (cse_request_global_reset())
+		return;
+
+	/* global reset if CSE fail to reset */
+	pmc_global_reset_enable(1);
+	do_full_reset();
+}