warp7: io_storage: Add initial stub warp7_io_storage.c

This commit adds support for parsing a FIP pre-loaded by a previous
boot-phase such as u-boot or via ATF reading directly from eMMC.

[bod: squashing several patches from Rui, Jun and bod]
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

plat/imx/imx7/warp7/warp7_io_storage.c

+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <assert.h>
+#include <debug.h>
+#include <mmc.h>
+#include <firmware_image_package.h>
+#include <io_block.h>
+#include <io_driver.h>
+#include <io_fip.h>
+#include <io_memmap.h>
+#include <platform_def.h>
+
+static const io_dev_connector_t *fip_dev_con;
+static uintptr_t fip_dev_handle;
+
+#ifndef WARP7_FIP_MMAP
+static const io_dev_connector_t *mmc_dev_con;
+static uintptr_t mmc_dev_handle;
+
+static const io_block_spec_t mmc_fip_spec = {
+	.offset = WARP7_FIP_MMC_BASE,
+	.length = WARP7_FIP_SIZE
+};
+
+static const io_block_dev_spec_t mmc_dev_spec = {
+	/* It's used as temp buffer in block driver. */
+	.buffer		= {
+		.offset	= WARP7_FIP_BASE,
+		/* do we need a new value? */
+		.length = WARP7_FIP_SIZE
+	},
+	.ops		= {
+		.read	= mmc_read_blocks,
+		.write	= mmc_write_blocks,
+	},
+	.block_size	= MMC_BLOCK_SIZE,
+};
+
+static int open_mmc(const uintptr_t spec);
+
+#else
+static const io_dev_connector_t *memmap_dev_con;
+static uintptr_t memmap_dev_handle;
+
+static const io_block_spec_t fip_block_spec = {
+	.offset = WARP7_FIP_BASE,
+	.length = WARP7_FIP_SIZE
+};
+static int open_memmap(const uintptr_t spec);
+#endif
+static int open_fip(const uintptr_t spec);
+
+static const io_uuid_spec_t bl32_uuid_spec = {
+	.uuid = UUID_SECURE_PAYLOAD_BL32,
+};
+
+static const io_uuid_spec_t hw_config_uuid_spec = {
+	.uuid = UUID_HW_CONFIG,
+};
+
+static const io_uuid_spec_t bl32_extra1_uuid_spec = {
+	.uuid = UUID_SECURE_PAYLOAD_BL32_EXTRA1,
+};
+
+static const io_uuid_spec_t bl32_extra2_uuid_spec = {
+	.uuid = UUID_SECURE_PAYLOAD_BL32_EXTRA2,
+};
+
+static const io_uuid_spec_t bl33_uuid_spec = {
+	.uuid = UUID_NON_TRUSTED_FIRMWARE_BL33,
+};
+
+/* TODO: this structure is replicated multiple times. rationalize it ! */
+struct plat_io_policy {
+	uintptr_t *dev_handle;
+	uintptr_t image_spec;
+	int (*check)(const uintptr_t spec);
+};
+
+static const struct plat_io_policy policies[] = {
+#ifndef WARP7_FIP_MMAP
+	[FIP_IMAGE_ID] = {
+		&mmc_dev_handle,
+		(uintptr_t)&mmc_fip_spec,
+		open_mmc
+	},
+#else
+	[FIP_IMAGE_ID] = {
+		&memmap_dev_handle,
+		(uintptr_t)&fip_block_spec,
+		open_memmap
+	},
+#endif
+	[BL32_IMAGE_ID] = {
+		&fip_dev_handle,
+		(uintptr_t)&bl32_uuid_spec,
+		open_fip
+	},
+	[BL32_EXTRA1_IMAGE_ID] = {
+		&fip_dev_handle,
+		(uintptr_t)&bl32_extra1_uuid_spec,
+		open_fip
+	},
+	[BL32_EXTRA2_IMAGE_ID] = {
+		&fip_dev_handle,
+		(uintptr_t)&bl32_extra2_uuid_spec,
+		open_fip
+	},
+	[HW_CONFIG_ID] = {
+		&fip_dev_handle,
+		(uintptr_t)&hw_config_uuid_spec,
+		open_fip
+	},
+	[BL33_IMAGE_ID] = {
+		&fip_dev_handle,
+		(uintptr_t)&bl33_uuid_spec,
+		open_fip
+	}
+};
+
+static 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;
+}
+
+#ifndef WARP7_FIP_MMAP
+static int open_mmc(const uintptr_t spec)
+{
+	int result;
+	uintptr_t local_handle;
+
+	result = io_dev_init(mmc_dev_handle, (uintptr_t)NULL);
+	if (result == 0) {
+		result = io_open(mmc_dev_handle, spec, &local_handle);
+		if (result == 0)
+			io_close(local_handle);
+	}
+	return result;
+}
+#else
+static 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;
+}
+#endif
+
+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 < ARRAY_SIZE(policies));
+
+	policy = &policies[image_id];
+	result = policy->check(policy->image_spec);
+	assert(result == 0);
+
+	*image_spec = policy->image_spec;
+	*dev_handle = *policy->dev_handle;
+
+	return result;
+}
+
+void plat_warp7_io_setup(void)
+{
+	int result __unused;
+
+#ifndef WARP7_FIP_MMAP
+	result = register_io_dev_block(&mmc_dev_con);
+	assert(result == 0);
+
+	result = io_dev_open(mmc_dev_con, (uintptr_t)&mmc_dev_spec,
+			     &mmc_dev_handle);
+	assert(result == 0);
+
+#else
+	result = register_io_dev_memmap(&memmap_dev_con);
+	assert(result == 0);
+
+	result = io_dev_open(memmap_dev_con, (uintptr_t)NULL,
+			     &memmap_dev_handle);
+	assert(result == 0);
+
+#endif
+	result = register_io_dev_fip(&fip_dev_con);
+	assert(result == 0);
+
+	result = io_dev_open(fip_dev_con, (uintptr_t)NULL,
+			     &fip_dev_handle);
+	assert(result == 0);
+}

plat/imx/imx7/warp7/warp7_private.h

@@ -10,5 +10,6 @@
 /*******************************************************************************
  * Function and variable prototypes
  ******************************************************************************/
+void plat_warp7_io_setup(void);
 
 #endif /*__WARP7_PRIVATE_H__ */