assets: abstract away the firmware assets used for booting

As there can be more than one source of firmware assets this
patch generalizes the notion of locating a particular asset.
struct asset is added along with some helper functions for
working on assets as a first class citizen.

Change-Id: I2ce575d1e5259aed4c34c3dcfd438abe9db1d7b9
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/10264
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins)

6 files changed, 115 insertions, 95 deletions

diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index ebb3076e63..557cd66846 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -18,6 +18,7 @@
 #
 subdirs-y += loaders
 
+bootblock-y += assets.c
 bootblock-y += prog_loaders.c
 bootblock-y += prog_ops.c
 bootblock-y += cbfs.c
@@ -36,6 +37,7 @@ bootblock-y += region.c
 bootblock-y += boot_device.c
 bootblock-y += fmap.c
 
+verstage-y += assets.c
 verstage-y += prog_loaders.c
 verstage-y += prog_ops.c
 verstage-y += delay.c
@@ -60,6 +62,7 @@ verstage-$(CONFIG_GENERIC_UDELAY) += timer.c
 verstage-$(CONFIG_GENERIC_GPIO_LIB) += gpio.c
 verstage-y += mem_pool.c
 
+romstage-y += assets.c
 romstage-y += prog_loaders.c
 romstage-y += prog_ops.c
 romstage-y += memchr.c
@@ -92,6 +95,7 @@ endif
 
 romstage-$(CONFIG_GENERIC_UDELAY) += timer.c
 
+ramstage-y += assets.c
 ramstage-y += prog_loaders.c
 ramstage-y += prog_ops.c
 ramstage-y += hardwaremain.c
diff --git a/src/lib/assets.c b/src/lib/assets.c
new file mode 100644
index 0000000000..656f0b1e2b
--- /dev/null
+++ b/src/lib/assets.c
@@ -0,0 +1,93 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 Google Inc.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.
+ */
+
+
+#include <assets.h>
+#include <boot_device.h>
+#include <cbfs.h>
+#include <console/console.h>
+#include <rules.h>
+#include <stdlib.h>
+
+#define DEFAULT_CBFS_PROVIDER_PRESENT \
+	(!ENV_VERSTAGE || (ENV_VERSTAGE && !CONFIG_RETURN_FROM_VERSTAGE))
+
+#if DEFAULT_CBFS_PROVIDER_PRESENT
+static int cbfs_boot_asset_locate(struct asset *asset)
+{
+	return cbfs_boot_locate(&asset->rdev, asset->name, NULL);
+}
+
+static const struct asset_provider cbfs_default_provider = {
+	.name = "CBFS",
+	.locate = cbfs_boot_asset_locate,
+};
+#endif
+
+extern const struct asset_provider vboot_provider;
+
+static const struct asset_provider *providers[] = {
+#if CONFIG_VBOOT_VERIFY_FIRMWARE
+	&vboot_provider,
+#endif
+#if DEFAULT_CBFS_PROVIDER_PRESENT
+	&cbfs_default_provider,
+#endif
+};
+
+int asset_locate(struct asset *asset)
+{
+	int i;
+
+	boot_device_init();
+
+	for (i = 0; i < ARRAY_SIZE(providers); i++) {
+		/* Default provider state is active. */
+		int ret = 1;
+		const struct asset_provider *ops;
+
+		ops = providers[i];
+
+		if (ops->is_active != NULL)
+			ret = ops->is_active(asset);
+
+		if (ret == 0) {
+			printk(BIOS_DEBUG, "%s provider inactive.\n",
+				ops->name);
+			continue;
+		} else if (ret < 0) {
+			printk(BIOS_DEBUG, "%s provider failure.\n",
+				ops->name);
+			continue;
+		}
+
+		printk(BIOS_DEBUG, "%s provider active.\n", ops->name);
+
+		if (ops->locate(asset))
+			continue;
+
+		printk(BIOS_DEBUG, "'%s' located at offset: %zx size: %zx\n",
+			asset->name, region_device_offset(&asset->rdev),
+			region_device_sz(&asset->rdev));
+
+		return 0;
+	}
+
+	return -1;
+}
diff --git a/src/lib/cbfs.c b/src/lib/cbfs.c
index 23dfee70c9..3e83765bf3 100644
--- a/src/lib/cbfs.c
+++ b/src/lib/cbfs.c
@@ -188,12 +188,10 @@ void *cbfs_boot_map_optionrom(uint16_t vendor, uint16_t device)
 
 void *cbfs_boot_load_stage_by_name(const char *name)
 {
-	struct prog stage = {
-		.name = name,
-	};
+	struct prog stage = PROG_INIT(ASSET_UNKNOWN, name);
 	uint32_t type = CBFS_TYPE_STAGE;
 
-	if (cbfs_boot_locate(&stage.rdev, name, &type))
+	if (cbfs_boot_locate(&stage.asset.rdev, name, &type))
 		return NULL;
 
 	if (cbfs_prog_stage_load(&stage))
@@ -209,7 +207,7 @@ int cbfs_prog_stage_load(struct prog *pstage)
 	void *entry;
 	size_t fsize;
 	size_t foffset;
-	const struct region_device *fh = &pstage->rdev;
+	const struct region_device *fh = &pstage->asset.rdev;
 
 	if (rdev_readat(fh, &stage, 0, sizeof(stage)) != sizeof(stage))
 		return 0;
diff --git a/src/lib/prog_loaders.c b/src/lib/prog_loaders.c
index 77999945d1..ec5eeb8693 100644
--- a/src/lib/prog_loaders.c
+++ b/src/lib/prog_loaders.c
@@ -20,7 +20,6 @@
 
 #include <stdlib.h>
 #include <arch/stages.h>
-#include <boot_device.h>
 #include <cbfs.h>
 #include <cbmem.h>
 #include <console/console.h>
@@ -38,83 +37,10 @@
 /* Only can represent up to 1 byte less than size_t. */
 const struct mem_region_device addrspace_32bit = MEM_REGION_DEV_INIT(0, ~0UL);
 
-#define DEFAULT_CBFS_LOADER_PRESENT \
-	(!ENV_VERSTAGE || (ENV_VERSTAGE && !CONFIG_RETURN_FROM_VERSTAGE))
-
-#if DEFAULT_CBFS_LOADER_PRESENT
-static int cbfs_boot_prog_locate(struct prog *prog)
-{
-	return cbfs_boot_locate(&prog->rdev, prog->name, NULL);
-}
-
-static const struct prog_loader_ops cbfs_default_loader = {
-	.locate = cbfs_boot_prog_locate,
-};
-#endif
-
-extern const struct prog_loader_ops vboot_loader;
-
-static const struct prog_loader_ops *loaders[] = {
-#if CONFIG_VBOOT_VERIFY_FIRMWARE
-	&vboot_loader,
-#endif
-#if DEFAULT_CBFS_LOADER_PRESENT
-	&cbfs_default_loader,
-#endif
-};
-
-int prog_locate(struct prog *prog)
-{
-	int i;
-
-	boot_device_init();
-
-	for (i = 0; i < ARRAY_SIZE(loaders); i++) {
-		/* Default loader state is active. */
-		int ret = 1;
-		const struct prog_loader_ops *ops;
-
-		ops = loaders[i];
-
-		if (ops->is_loader_active != NULL)
-			ret = ops->is_loader_active(prog);
-
-		if (ret == 0) {
-			printk(BIOS_DEBUG, "%s loader inactive.\n",
-				ops->name);
-			continue;
-		} else if (ret < 0) {
-			printk(BIOS_DEBUG, "%s loader failure.\n",
-				ops->name);
-			continue;
-		}
-
-		printk(BIOS_DEBUG, "%s loader active.\n", ops->name);
-
-		if (ops->locate(prog))
-			continue;
-
-		printk(BIOS_DEBUG, "'%s' located at offset: %zx size: %zx\n",
-			prog->name, region_device_offset(&prog->rdev),
-			region_device_sz(&prog->rdev));
-
-		return 0;
-	}
-
-	return -1;
-}
-
 void run_romstage(void)
 {
-	struct prog romstage = {
-		.name = CONFIG_CBFS_PREFIX "/romstage",
-		.type = PROG_ROMSTAGE,
-	};
-
-	/* The only time the default CBFS loader isn't present is during
-	 * VERSTAGE in which it returns back to the calling stage. */
-	if (!DEFAULT_CBFS_LOADER_PRESENT)
-		return;
+	struct prog romstage =
+		PROG_INIT(ASSET_ROMSTAGE, CONFIG_CBFS_PREFIX "/romstage");
 
 	if (prog_locate(&romstage))
 		goto fail;
@@ -166,10 +92,8 @@ static int load_relocatable_ramstage(struct prog *ramstage)
 
 void run_ramstage(void)
 {
-	struct prog ramstage = {
-		.name = CONFIG_CBFS_PREFIX "/ramstage",
-		.type = PROG_RAMSTAGE,
-	};
+	struct prog ramstage =
+		PROG_INIT(ASSET_RAMSTAGE, CONFIG_CBFS_PREFIX "/ramstage");
 
 	/* Only x86 systems currently take the same firmware path on resume. */
 	if (IS_ENABLED(CONFIG_ARCH_X86) && IS_ENABLED(CONFIG_EARLY_CBMEM_INIT))
@@ -197,10 +121,8 @@ fail:
 	die("Ramstage was not loaded!\n");
 }
 
-static struct prog global_payload = {
-	.name = CONFIG_CBFS_PREFIX "/payload",
-	.type = PROG_PAYLOAD,
-};
+static struct prog global_payload =
+	PROG_INIT(ASSET_PAYLOAD, CONFIG_CBFS_PREFIX "/payload");
 
 void __attribute__((weak)) mirror_payload(struct prog *payload)
 {
diff --git a/src/lib/rmodule.c b/src/lib/rmodule.c
index 35893d9d96..c17c7a5a2c 100644
--- a/src/lib/rmodule.c
+++ b/src/lib/rmodule.c
@@ -264,10 +264,10 @@ int rmodule_stage_load(struct rmod_stage_load *rsl)
 	void *rmod_loc;
 	struct region_device *fh;
 
-	if (rsl->prog == NULL || rsl->prog->name == NULL)
+	if (rsl->prog == NULL || prog_name(rsl->prog) == NULL)
 		return -1;
 
-	fh = &rsl->prog->rdev;
+	fh = prog_rdev(rsl->prog);
 
 	if (rdev_readat(fh, &stage, 0, sizeof(stage)) != sizeof(stage))
 		return -1;
@@ -284,7 +284,7 @@ int rmodule_stage_load(struct rmod_stage_load *rsl)
 	rmod_loc = &stage_region[rmodule_offset];
 
 	printk(BIOS_INFO, "Decompressing stage %s @ 0x%p (%d bytes)\n",
-	       rsl->prog->name, rmod_loc, stage.memlen);
+	       prog_name(rsl->prog), rmod_loc, stage.memlen);
 
 	if (stage.compression == CBFS_COMPRESS_NONE) {
 		if (rdev_readat(fh, rmod_loc, sizeof(stage), stage.len) !=
diff --git a/src/lib/selfboot.c b/src/lib/selfboot.c
index 3f8cc6fb18..94a75bef2e 100644
--- a/src/lib/selfboot.c
+++ b/src/lib/selfboot.c
@@ -454,7 +454,7 @@ void *selfload(struct prog *payload)
 	struct segment head;
 	void *data;
 
-	data = rdev_mmap_full(&payload->rdev);
+	data = rdev_mmap_full(prog_rdev(payload));
 
 	if (data == NULL)
 		return NULL;
@@ -469,7 +469,10 @@ void *selfload(struct prog *payload)
 
 	printk(BIOS_SPEW, "Loaded segments\n");
 
-	rdev_munmap(&payload->rdev, data);
+	rdev_munmap(prog_rdev(payload), data);
+
+	/* Update the payload's area with the bounce buffer information. */
+	prog_set_area(payload, (void *)(uintptr_t)bounce_buffer, bounce_size);
 
 	/* Update the payload's area with the bounce buffer information. */
 	prog_set_area(payload, (void *)(uintptr_t)bounce_buffer, bounce_size);
@@ -477,6 +480,6 @@ void *selfload(struct prog *payload)
 	return (void *)entry;
 
 out:
-	rdev_munmap(&payload->rdev, data);
+	rdev_munmap(prog_rdev(payload), data);
 	return NULL;
 }