Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5296
-gerrit
commit 2464f16875c60a408e0052a11707fccabe45b074 Author: Aaron Durbin adurbin@chromium.org Date: Mon Feb 24 14:56:34 2014 -0600
coreboot: infrastructure for loading payloads
A payload can be loaded either from a vboot region or from cbfs. Provide a common place for choosing where the payload is loaded from. Additionally, place the logic in the 'loaders' directory similarly to the ramstage loader infrastructure.
Change-Id: I6b0034ea5ebd04a3d058151819ac77a126a6bfe2 Signed-off-by: Aaron Durbin adurbin@chromium.org --- src/include/cbfs.h | 6 --- src/include/payload_loader.h | 61 +++++++++++++++++++++++ src/lib/cbfs.c | 19 -------- src/lib/hardwaremain.c | 22 ++++----- src/lib/loaders/Makefile.inc | 2 + src/lib/loaders/cbfs_payload_loader.c | 45 +++++++++++++++++ src/lib/loaders/load_and_run_payload.c | 81 +++++++++++++++++++++++++++++++ src/lib/selfboot.c | 1 + src/vendorcode/google/chromeos/chromeos.c | 25 +++++++++- src/vendorcode/google/chromeos/chromeos.h | 1 - 10 files changed, 223 insertions(+), 40 deletions(-)
diff --git a/src/include/cbfs.h b/src/include/cbfs.h index 9ce862b..ebdbf43 100644 --- a/src/include/cbfs.h +++ b/src/include/cbfs.h @@ -54,7 +54,6 @@
void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor, uint16_t device, void * dest); -void *cbfs_load_payload(struct cbfs_media *media, const char *name); void *cbfs_load_stage(struct cbfs_media *media, const char *name);
/* Simple buffer for streaming media. */ @@ -75,11 +74,6 @@ void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer, // Utility functions int run_address(void *f);
-/* Defined in src/lib/selfboot.c */ -struct lb_memory; -void *selfload(struct lb_memory *mem, struct cbfs_payload *payload); -void selfboot(void *entry); - /* Defined in individual arch / board implementation. */ int init_default_cbfs_media(struct cbfs_media *media);
diff --git a/src/include/payload_loader.h b/src/include/payload_loader.h new file mode 100644 index 0000000..27b62d3 --- /dev/null +++ b/src/include/payload_loader.h @@ -0,0 +1,61 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#ifndef PAYLOAD_LOADER_H +#define PAYLOAD_LOADER_H + +#include <stdint.h> +#include <stddef.h> + +struct payload_backing_store { + void *data; + size_t size; +}; + +struct payload { + const char *name; + struct payload_backing_store backing_store; + void *entry; +}; + +/* + * Load payload into memory and return pointer to payload structure. Returns + * NULL on error. + */ +struct payload *payload_load(void); + +/* Run the loaded payload. */ +void payload_run(const struct payload *payload); + +/* Payload loading operations. */ +struct payload_loader_ops { + const char *name; + /* + * Fill in payload_backing_store structure. Return 0 on success, < 0 + * if failure. + */ + int (*locate)(struct payload *payload); +}; + +/* Defined in src/lib/selfboot.c */ +struct lb_memory; +struct cbfs_payload; +void *selfload(struct lb_memory *mem, struct cbfs_payload *payload); +void selfboot(void *entry); + +#endif /* PAYLOAD_LOADER_H */ diff --git a/src/lib/cbfs.c b/src/lib/cbfs.c index 99eeac8..dc08937 100644 --- a/src/lib/cbfs.c +++ b/src/lib/cbfs.c @@ -65,12 +65,6 @@
#include "cbfs_core.c"
-#if CONFIG_VBOOT_VERIFY_FIRMWARE -#include <vendorcode/google/chromeos/chromeos.h> -#else -static inline void *vboot_get_payload(int *len) { return NULL; } -#endif - #ifndef __SMM__ static inline int tohex4(unsigned int c) { @@ -160,19 +154,6 @@ void * cbfs_load_stage(struct cbfs_media *media, const char *name) return (void *) entry; }
-void *cbfs_load_payload(struct cbfs_media *media, const char *name) -{ - struct cbfs_payload *payload; - - payload = vboot_get_payload(NULL); - if (payload != NULL) - return payload; - - payload = (struct cbfs_payload *)cbfs_get_file_content( - media, name, CBFS_TYPE_PAYLOAD, NULL); - return payload; -} - /* Simple buffer */
void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer, diff --git a/src/lib/hardwaremain.c b/src/lib/hardwaremain.c index fed153b..d90e0f6 100644 --- a/src/lib/hardwaremain.c +++ b/src/lib/hardwaremain.c @@ -32,7 +32,7 @@ #include <stdlib.h> #include <reset.h> #include <boot/tables.h> -#include <cbfs.h> +#include <payload_loader.h> #include <lib.h> #if CONFIG_HAVE_ACPI_RESUME #include <arch/acpi.h> @@ -226,30 +226,26 @@ static boot_state_t bs_write_tables(void *arg)
static boot_state_t bs_payload_load(void *arg) { - void *payload; - void *entry; + struct payload *payload;
timestamp_add_now(TS_LOAD_PAYLOAD);
- payload = cbfs_load_payload(CBFS_DEFAULT_MEDIA, - CONFIG_CBFS_PREFIX "/payload"); - if (! payload) - die("Could not find a payload\n"); - - entry = selfload(get_lb_mem(), payload); + payload = payload_load();
- if (! entry) + if (! payload) die("Could not load payload\n");
/* Pass the payload to the next state. */ - boot_states[BS_PAYLOAD_BOOT].arg = entry; + boot_states[BS_PAYLOAD_BOOT].arg = payload;
return BS_PAYLOAD_BOOT; }
-static boot_state_t bs_payload_boot(void *entry) +static boot_state_t bs_payload_boot(void *arg) { - selfboot(entry); + struct payload *payload = arg; + + payload_run(payload);
printk(BIOS_EMERG, "Boot failed"); /* Returning from this state will fail because the following signals diff --git a/src/lib/loaders/Makefile.inc b/src/lib/loaders/Makefile.inc index eceaa00..356e47e 100644 --- a/src/lib/loaders/Makefile.inc +++ b/src/lib/loaders/Makefile.inc @@ -19,3 +19,5 @@
romstage-y += cbfs_ramstage_loader.c romstage-y += load_and_run_ramstage.c +ramstage-y += cbfs_payload_loader.c +ramstage-y += load_and_run_payload.c diff --git a/src/lib/loaders/cbfs_payload_loader.c b/src/lib/loaders/cbfs_payload_loader.c new file mode 100644 index 0000000..c115572 --- /dev/null +++ b/src/lib/loaders/cbfs_payload_loader.c @@ -0,0 +1,45 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <cbfs.h> +#include <payload_loader.h> + +static int cbfs_locate_payload(struct payload *payload) +{ + void *buffer; + size_t size; + const int type = CBFS_TYPE_PAYLOAD; + + buffer = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, payload->name, + type, &size); + + if (buffer == NULL) + return -1; + + payload->backing_store.data = buffer; + payload->backing_store.size = size; + + return 0; +} + +const struct payload_loader_ops cbfs_payload_loader = { + .name = "CBFS", + .locate = cbfs_locate_payload, +}; + diff --git a/src/lib/loaders/load_and_run_payload.c b/src/lib/loaders/load_and_run_payload.c new file mode 100644 index 0000000..dba5898 --- /dev/null +++ b/src/lib/loaders/load_and_run_payload.c @@ -0,0 +1,81 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdint.h> +#include <stdlib.h> +#include <console/console.h> +#include <boot/coreboot_tables.h> +#include <payload_loader.h> + +extern const struct payload_loader_ops vboot_payload_loader; +extern const struct payload_loader_ops cbfs_payload_loader; + +static const struct payload_loader_ops *payload_ops[] = { +#if CONFIG_VBOOT_VERIFY_FIRMWARE + &vboot_payload_loader, +#endif + &cbfs_payload_loader, +}; + +static struct payload global_payload = { + .name = CONFIG_CBFS_PREFIX "/payload", +}; + +struct payload *payload_load(void) +{ + int i; + void *entry; + struct lb_mem *mem; + const struct payload_loader_ops *ops; + struct payload *payload = &global_payload; + + for (i = 0; i < ARRAY_SIZE(payload_ops); i++) { + ops = payload_ops[i]; + if (ops->locate(payload) < 0) { + printk(BIOS_DEBUG, "%s: could not locate payload.\n", + ops->name); + continue; + } + printk(BIOS_DEBUG, "%s: located payload @ %p, %zu bytes.\n", + ops->name, payload->backing_store.data, + payload->backing_store.size); + break; + } + + if (i == ARRAY_SIZE(payload_ops)) + return NULL; + + mem = get_lb_mem(); + entry = selfload(mem, payload->backing_store.data); + + if (entry == NULL) + return NULL; + + payload->entry = entry; + + return payload; +} + +void payload_run(const struct payload *payload) +{ + if (payload == NULL) + return; + + selfboot(payload->entry); +} diff --git a/src/lib/selfboot.c b/src/lib/selfboot.c index 222eae2..c0986d1 100644 --- a/src/lib/selfboot.c +++ b/src/lib/selfboot.c @@ -32,6 +32,7 @@ #if CONFIG_COLLECT_TIMESTAMPS #include <timestamp.h> #endif +#include <payload_loader.h>
/* Maximum physical address we can use for the coreboot bounce buffer. */ #ifndef MAX_ADDR diff --git a/src/vendorcode/google/chromeos/chromeos.c b/src/vendorcode/google/chromeos/chromeos.c index 54fe8db..e917ba1 100644 --- a/src/vendorcode/google/chromeos/chromeos.c +++ b/src/vendorcode/google/chromeos/chromeos.c @@ -82,7 +82,9 @@ int recovery_mode_enabled(void) }
#if CONFIG_VBOOT_VERIFY_FIRMWARE -void *vboot_get_payload(size_t *len) +#include <payload_loader.h> + +static void *vboot_get_payload(size_t *len) { struct vboot_handoff *vboot_handoff; struct firmware_component *fwc; @@ -109,6 +111,27 @@ void *vboot_get_payload(size_t *len) return (void *)fwc->address; }
+static int vboot_locate_payload(struct payload *payload) +{ + void *buffer; + size_t size; + + buffer = vboot_get_payload(&size); + + if (buffer == NULL) + return -1; + + payload->backing_store.data = buffer; + payload->backing_store.size = size; + + return 0; +} + +const struct payload_loader_ops vboot_payload_loader = { + .name = "VBOOT", + .locate = vboot_locate_payload, +}; + int vboot_get_handoff_info(void **addr, uint32_t *size) { struct vboot_handoff *vboot_handoff; diff --git a/src/vendorcode/google/chromeos/chromeos.h b/src/vendorcode/google/chromeos/chromeos.h index 0359c91..7fe8f06 100644 --- a/src/vendorcode/google/chromeos/chromeos.h +++ b/src/vendorcode/google/chromeos/chromeos.h @@ -47,7 +47,6 @@ int recovery_mode_enabled(void); void init_chromeos(int bootmode);
#if CONFIG_VBOOT_VERIFY_FIRMWARE -void *vboot_get_payload(size_t *len); /* Returns 0 on success < 0 on error. */ int vboot_get_handoff_info(void **addr, uint32_t *size); #endif