1 files changed, 90 insertions, 0 deletions
diff --git a/src/arch/arm64/bl31.c b/src/arch/arm64/bl31.c
new file mode 100644
index 0000000000..fb24dff40e
--- /dev/null
+++ b/src/arch/arm64/bl31.c
@@ -0,0 +1,90 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <arch/cache.h>
+#include <arch/lib_helpers.h>
+#include <arch/mmu.h>
+#include <arch/transition.h>
+#include <bl31.h>
+#include <bootmem.h>
+#include <cbfs.h>
+#include <console/console.h>
+#include <program_loading.h>
+
+/*
+ * TODO: Many of these structures are currently unused. Better not fill them out
+ * to make future changes fail fast, rather than try to come up with content
+ * that might turn out to not make sense. Implement later as required.
+ *
+static image_info_t bl31_image_info;
+static image_info_t bl32_image_info;
+static image_info_t bl33_image_info;
+ */
+static entry_point_info_t bl32_ep_info;
+static entry_point_info_t bl33_ep_info;
+static bl31_params_t bl31_params;
+
+void __weak *soc_get_bl31_plat_params(bl31_params_t *params)
+{
+	/* Default weak implementation. */
+	return NULL;
+}
+
+void run_bl31(u64 payload_entry, u64 payload_arg0, u64 payload_spsr)
+{
+	struct prog bl31 = PROG_INIT(PROG_BL31, CONFIG_CBFS_PREFIX"/bl31");
+	void (*bl31_entry)(bl31_params_t *params, void *plat_params) = NULL;
+
+	if (prog_locate(&bl31))
+		die("BL31 not found");
+
+	if (!selfload_check(&bl31, BM_MEM_BL31))
+		die("BL31 load failed");
+	bl31_entry = prog_entry(&bl31);
+
+	SET_PARAM_HEAD(&bl31_params, PARAM_BL31, VERSION_1, 0);
+
+	if (CONFIG(ARM64_USE_SECURE_OS)) {
+		struct prog bl32 = PROG_INIT(PROG_BL32,
+					     CONFIG_CBFS_PREFIX"/secure_os");
+
+		if (prog_locate(&bl32))
+			die("BL32 not found");
+
+		if (cbfs_prog_stage_load(&bl32))
+			die("BL32 load failed");
+
+		SET_PARAM_HEAD(&bl32_ep_info, PARAM_EP, VERSION_1,
+			       PARAM_EP_SECURE);
+		bl32_ep_info.pc = (uintptr_t)prog_entry(&bl32);
+		bl32_ep_info.spsr = SPSR_EXCEPTION_MASK |
+				get_eret_el(EL1, SPSR_USE_L);
+		bl31_params.bl32_ep_info = &bl32_ep_info;
+	}
+
+	bl31_params.bl33_ep_info = &bl33_ep_info;
+
+	SET_PARAM_HEAD(&bl33_ep_info, PARAM_EP, VERSION_1, PARAM_EP_NON_SECURE);
+	bl33_ep_info.pc = payload_entry;
+	bl33_ep_info.spsr = payload_spsr;
+	bl33_ep_info.args.arg0 = payload_arg0;
+
+	/* May update bl31_params if necessary. */
+	void *bl31_plat_params = soc_get_bl31_plat_params(&bl31_params);
+
+	/* MMU disable will flush cache, so passed params land in memory. */
+	raw_write_daif(SPSR_EXCEPTION_MASK);
+	mmu_disable();
+	bl31_entry(&bl31_params, bl31_plat_params);
+	die("BL31 returned!");
+}