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-rw-r--r--plat/arm/common/arm_fconf_io_storage.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/plat/arm/common/arm_fconf_io_storage.c b/plat/arm/common/arm_fconf_io_storage.c
new file mode 100644
index 0000000000..341622a0bb
--- /dev/null
+++ b/plat/arm/common/arm_fconf_io_storage.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2015-2020, ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <common/debug.h>
+#include <drivers/io/io_driver.h>
+#include <drivers/io/io_fip.h>
+#include <drivers/io/io_memmap.h>
+#include <drivers/io/io_storage.h>
+#include <lib/utils.h>
+#include <tools_share/firmware_image_package.h>
+
+#include <plat/arm/common/arm_fconf_getter.h>
+#include <plat/arm/common/arm_fconf_io_storage.h>
+#include <plat/arm/common/plat_arm.h>
+#include <plat/common/platform.h>
+#include <platform_def.h>
+
+/* IO devices */
+static const io_dev_connector_t *fip_dev_con;
+uintptr_t fip_dev_handle;
+static const io_dev_connector_t *memmap_dev_con;
+uintptr_t memmap_dev_handle;
+
+/* Weak definitions may be overridden in specific ARM standard platform */
+#pragma weak plat_arm_io_setup
+#pragma weak plat_arm_get_alt_image_source
+
+int open_fip(const uintptr_t spec)
+{
+ int result;
+ uintptr_t local_image_handle;
+
+ /* See if a Firmware Image Package is available */
+ result = io_dev_init(fip_dev_handle, (uintptr_t)FIP_IMAGE_ID);
+ if (result == 0) {
+ result = io_open(fip_dev_handle, spec, &local_image_handle);
+ if (result == 0) {
+ VERBOSE("Using FIP\n");
+ io_close(local_image_handle);
+ }
+ }
+ return result;
+}
+
+int open_memmap(const uintptr_t spec)
+{
+ int result;
+ uintptr_t local_image_handle;
+
+ result = io_dev_init(memmap_dev_handle, (uintptr_t)NULL);
+ if (result == 0) {
+ result = io_open(memmap_dev_handle, spec, &local_image_handle);
+ if (result == 0) {
+ VERBOSE("Using Memmap\n");
+ io_close(local_image_handle);
+ }
+ }
+ return result;
+}
+
+int arm_io_setup(void)
+{
+ int io_result;
+
+ io_result = register_io_dev_fip(&fip_dev_con);
+ if (io_result < 0) {
+ return io_result;
+ }
+
+ io_result = register_io_dev_memmap(&memmap_dev_con);
+ if (io_result < 0) {
+ return io_result;
+ }
+
+ /* Open connections to devices and cache the handles */
+ io_result = io_dev_open(fip_dev_con, (uintptr_t)NULL,
+ &fip_dev_handle);
+ if (io_result < 0) {
+ return io_result;
+ }
+
+ io_result = io_dev_open(memmap_dev_con, (uintptr_t)NULL,
+ &memmap_dev_handle);
+
+ return io_result;
+}
+
+void plat_arm_io_setup(void)
+{
+ int err;
+
+ err = arm_io_setup();
+ if (err < 0) {
+ panic();
+ }
+}
+
+int plat_arm_get_alt_image_source(
+ unsigned int image_id __unused,
+ uintptr_t *dev_handle __unused,
+ uintptr_t *image_spec __unused)
+{
+ /* By default do not try an alternative */
+ return -ENOENT;
+}
+
+/* Return an IO device handle and specification which can be used to access
+ * an image. Use this to enforce platform load policy */
+int plat_get_image_source(unsigned int image_id, uintptr_t *dev_handle,
+ uintptr_t *image_spec)
+{
+ int result;
+ const struct plat_io_policy *policy;
+
+ assert(image_id < MAX_NUMBER_IDS);
+
+ policy = FCONF_GET_PROPERTY(arm, io_policies, image_id);
+ result = policy->check(policy->image_spec);
+ if (result == 0) {
+ *image_spec = policy->image_spec;
+ *dev_handle = *(policy->dev_handle);
+ } else {
+ VERBOSE("Trying alternative IO\n");
+ result = plat_arm_get_alt_image_source(image_id, dev_handle,
+ image_spec);
+ }
+
+ return result;
+}
+
+/*
+ * See if a Firmware Image Package is available,
+ * by checking if TOC is valid or not.
+ */
+bool arm_io_is_toc_valid(void)
+{
+ return (io_dev_init(fip_dev_handle, (uintptr_t)FIP_IMAGE_ID) == 0);
+}