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-rw-r--r--src/lib/hardwaremain.c300
1 files changed, 240 insertions, 60 deletions
diff --git a/src/lib/hardwaremain.c b/src/lib/hardwaremain.c
index a3ee10bef2..dba47a7348 100644
--- a/src/lib/hardwaremain.c
+++ b/src/lib/hardwaremain.c
@@ -1,23 +1,20 @@
/*
-This software and ancillary information (herein called SOFTWARE )
-called LinuxBIOS is made available under the terms described
-here. The SOFTWARE has been approved for release with associated
-LA-CC Number 00-34 . Unless otherwise indicated, this SOFTWARE has
-been authored by an employee or employees of the University of
-California, operator of the Los Alamos National Laboratory under
-Contract No. W-7405-ENG-36 with the U.S. Department of Energy. The
-U.S. Government has rights to use, reproduce, and distribute this
-SOFTWARE. The public may copy, distribute, prepare derivative works
-and publicly display this SOFTWARE without charge, provided that this
-Notice and any statement of authorship are reproduced on all copies.
-Neither the Government nor the University makes any warranty, express
-or implied, or assumes any liability or responsibility for the use of
-this SOFTWARE. If SOFTWARE is modified to produce derivative works,
-such modified SOFTWARE should be clearly marked, so as not to confuse
-it with the version available from LANL.
- */
-/* Copyright 2000, Ron Minnich, Advanced Computing Lab, LANL
- * rminnich@lanl.gov
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 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
*/
@@ -25,6 +22,7 @@ it with the version available from LANL.
* C Bootstrap code for the coreboot
*/
+#include <bootstate.h>
#include <console/console.h>
#include <version.h>
#include <device/device.h>
@@ -43,80 +41,127 @@ it with the version available from LANL.
#include <coverage.h>
#include <timestamp.h>
-/**
- * @brief Main function of the RAM part of coreboot.
- *
- * Coreboot is divided into Pre-RAM part and RAM part.
- *
- * Device Enumeration:
- * In the dev_enumerate() phase,
- */
-
-void hardwaremain(int boot_complete);
-
-void hardwaremain(int boot_complete)
-{
- struct lb_memory *lb_mem;
- void *payload;
-
- timestamp_stash(TS_START_RAMSTAGE);
- post_code(POST_ENTRY_RAMSTAGE);
-
-#if CONFIG_COVERAGE
- coverage_init();
+#if BOOT_STATE_DEBUG
+#define BS_DEBUG_LVL BIOS_DEBUG
+#else
+#define BS_DEBUG_LVL BIOS_NEVER
#endif
- /* console_init() MUST PRECEDE ALL printk()! */
- console_init();
-
- post_code(POST_CONSOLE_READY);
-
- printk(BIOS_NOTICE, "coreboot-%s%s %s %s...\n",
- coreboot_version, coreboot_extra_version, coreboot_build,
- (boot_complete)?"rebooting":"booting");
-
- post_code(POST_CONSOLE_BOOT_MSG);
-
- /* If we have already booted attempt a hard reboot */
- if (boot_complete) {
- hard_reset();
+static boot_state_t bs_pre_device(void *arg);
+static boot_state_t bs_dev_init_chips(void *arg);
+static boot_state_t bs_dev_enumerate(void *arg);
+static boot_state_t bs_dev_resources(void *arg);
+static boot_state_t bs_dev_eanble(void *arg);
+static boot_state_t bs_dev_init(void *arg);
+static boot_state_t bs_post_device(void *arg);
+static boot_state_t bs_os_resume(void *arg);
+static boot_state_t bs_write_tables(void *arg);
+static boot_state_t bs_payload_load(void *arg);
+static boot_state_t bs_payload_boot(void *arg);
+
+struct boot_state {
+ const char *name;
+ boot_state_t id;
+ struct boot_state_callback *seq_callbacks[2];
+ boot_state_t (*run_state)(void *arg);
+ void *arg;
+ int complete;
+};
+
+#define BS_INIT(state_, run_func_) \
+ { \
+ .name = #state_, \
+ .id = state_, \
+ .seq_callbacks = { NULL, NULL },\
+ .run_state = run_func_, \
+ .arg = NULL, \
+ .complete = 0 \
}
-
- /* FIXME: Is there a better way to handle this? */
- init_timer();
-
+#define BS_INIT_ENTRY(state_, run_func_) \
+ [state_] = BS_INIT(state_, run_func_)
+
+static struct boot_state boot_states[] = {
+ BS_INIT_ENTRY(BS_PRE_DEVICE, bs_pre_device),
+ BS_INIT_ENTRY(BS_DEV_INIT_CHIPS, bs_dev_init_chips),
+ BS_INIT_ENTRY(BS_DEV_ENUMERATE, bs_dev_enumerate),
+ BS_INIT_ENTRY(BS_DEV_RESOURCES, bs_dev_resources),
+ BS_INIT_ENTRY(BS_DEV_ENABLE, bs_dev_eanble),
+ BS_INIT_ENTRY(BS_DEV_INIT, bs_dev_init),
+ BS_INIT_ENTRY(BS_POST_DEVICE, bs_post_device),
+ BS_INIT_ENTRY(BS_OS_RESUME, bs_os_resume),
+ BS_INIT_ENTRY(BS_WRITE_TABLES, bs_write_tables),
+ BS_INIT_ENTRY(BS_PAYLOAD_LOAD, bs_payload_load),
+ BS_INIT_ENTRY(BS_PAYLOAD_BOOT, bs_payload_boot),
+};
+
+static boot_state_t bs_pre_device(void *arg)
+{
init_cbmem_pre_device();
+ return BS_DEV_INIT_CHIPS;
+}
+static boot_state_t bs_dev_init_chips(void *arg)
+{
timestamp_stash(TS_DEVICE_ENUMERATE);
/* Initialize chips early, they might disable unused devices. */
dev_initialize_chips();
+ return BS_DEV_ENUMERATE;
+}
+
+static boot_state_t bs_dev_enumerate(void *arg)
+{
/* Find the devices we don't have hard coded knowledge about. */
dev_enumerate();
post_code(POST_DEVICE_ENUMERATION_COMPLETE);
+ return BS_DEV_RESOURCES;
+}
+
+static boot_state_t bs_dev_resources(void *arg)
+{
timestamp_stash(TS_DEVICE_CONFIGURE);
/* Now compute and assign the bus resources. */
dev_configure();
post_code(POST_DEVICE_CONFIGURATION_COMPLETE);
+ return BS_DEV_ENABLE;
+}
+
+static boot_state_t bs_dev_eanble(void *arg)
+{
timestamp_stash(TS_DEVICE_ENABLE);
/* Now actually enable devices on the bus */
dev_enable();
post_code(POST_DEVICES_ENABLED);
+ return BS_DEV_INIT;
+}
+
+static boot_state_t bs_dev_init(void *arg)
+{
timestamp_stash(TS_DEVICE_INITIALIZE);
/* And of course initialize devices on the bus */
dev_initialize();
post_code(POST_DEVICES_INITIALIZED);
+ return BS_POST_DEVICE;
+}
+
+static boot_state_t bs_post_device(void *arg)
+{
timestamp_stash(TS_DEVICE_DONE);
init_cbmem_post_device();
timestamp_sync();
+ return BS_OS_RESUME;
+}
+
+static boot_state_t bs_os_resume(void *arg)
+{
#if CONFIG_HAVE_ACPI_RESUME
suspend_resume();
post_code(0x8a);
@@ -124,6 +169,11 @@ void hardwaremain(int boot_complete)
timestamp_add_now(TS_CBMEM_POST);
+ return BS_WRITE_TABLES;
+}
+
+static boot_state_t bs_write_tables(void *arg)
+{
if (cbmem_post_handling)
cbmem_post_handling();
@@ -132,7 +182,14 @@ void hardwaremain(int boot_complete)
/* Now that we have collected all of our information
* write our configuration tables.
*/
- lb_mem = write_tables();
+ write_tables();
+
+ return BS_PAYLOAD_LOAD;
+}
+
+static boot_state_t bs_payload_load(void *arg)
+{
+ void *payload;
timestamp_add_now(TS_LOAD_PAYLOAD);
@@ -141,7 +198,130 @@ void hardwaremain(int boot_complete)
if (! payload)
die("Could not find a payload\n");
- selfboot(lb_mem, payload);
+ /* Pass the payload to the next state. */
+ boot_states[BS_PAYLOAD_BOOT].arg = payload;
+
+ return BS_PAYLOAD_BOOT;
+}
+
+static boot_state_t bs_payload_boot(void *payload)
+{
+ selfboot(get_lb_mem(), payload);
+
printk(BIOS_EMERG, "Boot failed");
+ /* Returning from this state will fail because the following signals
+ * return to a completed state. */
+ return BS_PAYLOAD_BOOT;
+}
+
+static void bs_call_callbacks(struct boot_state *state,
+ boot_state_sequence_t seq)
+{
+ while (state->seq_callbacks[seq] != NULL) {
+ struct boot_state_callback *bscb;
+
+ /* Remove the first callback. */
+ bscb = state->seq_callbacks[seq];
+ state->seq_callbacks[seq] = bscb->next;
+ bscb->next = NULL;
+
+#if BOOT_STATE_DEBUG
+ printk(BS_DEBUG_LVL, "BS: callback (%p) @ %s.\n",
+ bscb, bscb->location);
+#endif
+ bscb->callback(bscb->arg);
+ }
+}
+
+static void bs_walk_state_machine(boot_state_t current_state_id)
+{
+
+ while (1) {
+ struct boot_state *state;
+
+ state = &boot_states[current_state_id];
+
+ if (state->complete) {
+ printk(BIOS_EMERG, "BS: %s state already executed.\n",
+ state->name);
+ break;
+ }
+
+ printk(BS_DEBUG_LVL, "BS: Entering %s state.\n", state->name);
+ bs_call_callbacks(state, BS_ON_ENTRY);
+
+ current_state_id = state->run_state(state->arg);
+
+ printk(BS_DEBUG_LVL, "BS: Exiting %s state.\n", state->name);
+ bs_call_callbacks(state, BS_ON_EXIT);
+
+ state->complete = 1;
+ }
+}
+
+static int boot_state_sched_callback(struct boot_state *state,
+ struct boot_state_callback *bscb,
+ boot_state_sequence_t seq)
+{
+ if (state->complete) {
+ printk(BIOS_WARNING,
+ "Tried to schedule callback on completed state %s.\n",
+ state->name);
+
+ return -1;
+ }
+
+ bscb->next = state->seq_callbacks[seq];
+ state->seq_callbacks[seq] = bscb;
+
+ return 0;
+}
+
+int boot_state_sched_on_entry(struct boot_state_callback *bscb,
+ boot_state_t state_id)
+{
+ struct boot_state *state = &boot_states[state_id];
+
+ return boot_state_sched_callback(state, bscb, BS_ON_ENTRY);
+}
+
+int boot_state_sched_on_exit(struct boot_state_callback *bscb,
+ boot_state_t state_id)
+{
+ struct boot_state *state = &boot_states[state_id];
+
+ return boot_state_sched_callback(state, bscb, BS_ON_EXIT);
+}
+
+void hardwaremain(int boot_complete)
+{
+ timestamp_stash(TS_START_RAMSTAGE);
+ post_code(POST_ENTRY_RAMSTAGE);
+
+#if CONFIG_COVERAGE
+ coverage_init();
+#endif
+
+ /* console_init() MUST PRECEDE ALL printk()! */
+ console_init();
+
+ post_code(POST_CONSOLE_READY);
+
+ printk(BIOS_NOTICE, "coreboot-%s%s %s %s...\n",
+ coreboot_version, coreboot_extra_version, coreboot_build,
+ (boot_complete)?"rebooting":"booting");
+
+ post_code(POST_CONSOLE_BOOT_MSG);
+
+ /* If we have already booted attempt a hard reboot */
+ if (boot_complete) {
+ hard_reset();
+ }
+
+ /* FIXME: Is there a better way to handle this? */
+ init_timer();
+
+ bs_walk_state_machine(BS_PRE_DEVICE);
+ die("Boot state machine failure.\n");
}