From bdf913ab010c99db8e64845f5b5837c9008609dc Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Mon, 24 Feb 2014 14:56:34 -0600 Subject: coreboot: unify 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 Reviewed-on: http://review.coreboot.org/5296 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc Reviewed-by: Edward O'Callaghan Reviewed-by: Paul Menzel --- src/lib/loaders/Makefile.inc | 2 + src/lib/loaders/cbfs_payload_loader.c | 44 ++++++++++++++++++ src/lib/loaders/load_and_run_payload.c | 81 ++++++++++++++++++++++++++++++++++ 3 files changed, 127 insertions(+) create mode 100644 src/lib/loaders/cbfs_payload_loader.c create mode 100644 src/lib/loaders/load_and_run_payload.c (limited to 'src/lib/loaders') diff --git a/src/lib/loaders/Makefile.inc b/src/lib/loaders/Makefile.inc index eceaa00c44..356e47e328 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 0000000000..2c1d1796f2 --- /dev/null +++ b/src/lib/loaders/cbfs_payload_loader.c @@ -0,0 +1,44 @@ +/* + * 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 +#include + +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 0000000000..46db93c719 --- /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 +#include +#include +#include +#include + +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_memory *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); +} -- cgit v1.2.3