vendorcode/amd/opensil: Add initial setup and API calls

- First a console is set up for opensil.
- After that a region in CBMEM is reserved and passed to opensil which
will use it as a buffer for input/output information.
- Finally opensil is called and the return value handled.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: I4833a5a86034a13e6be102a6b68c3bb54108bc9a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76515
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

2 files changed, 90 insertions, 0 deletions

diff --git a/src/vendorcode/amd/opensil/genoa_poc/Makefile.inc b/src/vendorcode/amd/opensil/genoa_poc/Makefile.inc
index c5742b5992..6bfd95e264 100644
--- a/src/vendorcode/amd/opensil/genoa_poc/Makefile.inc
+++ b/src/vendorcode/amd/opensil/genoa_poc/Makefile.inc
@@ -7,6 +7,7 @@ romstage-y += opensil_console.c
 romstage-y += romstage.c
 
 ramstage-y += opensil_console.c
+ramstage-y += ramstage.c
 
 $(obj)/romstage/vendorcode/amd/opensil/genoa_poc/opensil_console.o: CFLAGS_romstage += -D_MSC_EXTENSIONS=0 -DHAS_STRING_H=1 -Wno-unknown-pragmas
 $(obj)/romstage/vendorcode/amd/opensil/genoa_poc/romstage.o: CFLAGS_romstage += -D_MSC_EXTENSIONS=0 -DHAS_STRING_H=1 -Wno-unknown-pragmas
diff --git a/src/vendorcode/amd/opensil/genoa_poc/ramstage.c b/src/vendorcode/amd/opensil/genoa_poc/ramstage.c
new file mode 100644
index 0000000000..bde09f1e9e
--- /dev/null
+++ b/src/vendorcode/amd/opensil/genoa_poc/ramstage.c
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <amdblocks/reset.h>
+#include <bootstate.h>
+#include <cbmem.h>
+#include <xSIM-api.h>
+#include "opensil_console.h"
+
+static void SIL_STATUS_report(const char *function, const int status)
+{
+	const int log_level = status == SilPass ? BIOS_DEBUG : BIOS_ERR;
+	const char *error_string = "Unkown error";
+
+	const struct error_string_entry {
+		SIL_STATUS status;
+		const char *string;
+	} errors[] = {
+		{SilPass, "SilPass"},
+		{SilUnsupportedHardware, "SilUnsupportedHardware"},
+		{SilUnsupported, "SilUnsupported"},
+		{SilInvalidParameter, "SilInvalidParameter"},
+		{SilAborted, "SilAborted"},
+		{SilOutOfResources, "SilOutOfResources"},
+		{SilNotFound, "SilNotFound"},
+		{SilOutOfBounds, "SilOutOfBounds"},
+		{SilDeviceError, "SilDeviceError"},
+		{SilResetRequestColdImm, "SilResetRequestColdImm"},
+		{SilResetRequestColdDef, "SilResetRequestColdDef"},
+		{SilResetRequestWarmImm, "SilResetRequestWarmImm"},
+		{SilResetRequestWarmDef, "SilResetRequestWarmDef"},
+	};
+
+	int i;
+	for (i = 0; i < ARRAY_SIZE(errors); i++) {
+		if (errors[i].status == status)
+			error_string = errors[i].string;
+	}
+	printk(log_level, "%s returned %d (%s)\n", function, status, error_string);
+}
+
+static void setup_opensil(void *unused)
+{
+	const SIL_STATUS debug_ret = SilDebugSetup(HostDebugService);
+	SIL_STATUS_report("SilDebugSetup", debug_ret);
+	const size_t mem_req = xSimQueryMemoryRequirements();
+	void *buf = cbmem_add(CBMEM_ID_AMD_OPENSIL, mem_req);
+	assert(buf);
+	/* We run all openSIL timepoints in the same stage so using TP1 as argument is fine. */
+	const SIL_STATUS assign_mem_ret = xSimAssignMemoryTp1(buf, mem_req);
+	SIL_STATUS_report("xSimAssignMemory", assign_mem_ret);
+}
+
+BOOT_STATE_INIT_ENTRY(BS_DEV_INIT_CHIPS, BS_ON_ENTRY, setup_opensil, NULL);
+
+static void opensil_entry(void *timepoint)
+{
+	SIL_STATUS ret;
+	SIL_TIMEPOINT tp = (uintptr_t)timepoint;
+
+	switch (tp) {
+	case SIL_TP1:
+		ret = InitializeSiTp1();
+		break;
+	case SIL_TP2:
+		ret = InitializeSiTp2();
+		break;
+	case SIL_TP3:
+		ret = InitializeSiTp3();
+		break;
+	default:
+		printk(BIOS_ERR, "Unknown opensil timepoint\n");
+		return;
+	}
+	char opensil_function[16];
+	snprintf(opensil_function, sizeof(opensil_function), "InitializeSiTp%d", tp);
+	SIL_STATUS_report(opensil_function, ret);
+	if (ret == SilResetRequestColdImm || ret == SilResetRequestColdDef) {
+		printk(BIOS_INFO, "openSil requested a cold reset");
+		do_cold_reset();
+	} else if (ret == SilResetRequestWarmImm || ret == SilResetRequestWarmDef) {
+		printk(BIOS_INFO, "openSil requested a warm reset");
+		do_warm_reset();
+	}
+}
+
+/* TODO: look into calling these functions from some SoC device operations instead of using
+ * BOOT_STATE_INIT_ENTRY */
+BOOT_STATE_INIT_ENTRY(BS_DEV_INIT_CHIPS, BS_ON_EXIT, opensil_entry, (void *)SIL_TP1);
+/* TODO add other timepoints later. Are they NOOP? */