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BACKPORT: boot state: schedule static callbacks

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Many of the boot state callbacks can be scheduled at compile time.
Therefore, provide a way for a compilation unit to inform the
boot state machine when its callbacks should be called. Each C
module can export the callbacks and their scheduling requirements
without changing the shared boot flow code.

Change-Id: I6a4102cb9fac3f7980c28169430251651fddeb30
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/49741
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This commit is contained in:
Aaron Durbin 2013-04-24 16:12:52 -05:00 • committed by ChromeBot
commit d9f0d0e455
5 changed files with 51 additions and 0 deletions
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21
src/include/bootstate.h
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@ -158,4 +158,25 @@ int boot_state_sched_on_exit(struct boot_state_callback *bscb,
/* Entry into the boot state machine. */
void hardwaremain(int boot_complete);
/* In order to schedule boot state callbacks at compile-time specify the
* entries in an array using the BOOT_STATE_INIT_ENTRIES and
* BOOT_STATE_INIT_ENTRY macros below. */
struct boot_state_init_entry {
boot_state_t state;
boot_state_sequence_t when;
struct boot_state_callback bscb;
};
#define BOOT_STATE_INIT_ATTR __attribute__ ((used,section (".bs_init")))
#define BOOT_STATE_INIT_ENTRIES(name_) \
static struct boot_state_init_entry name_[] BOOT_STATE_INIT_ATTR
#define BOOT_STATE_INIT_ENTRY(state_, when_, func_, arg_) \
{ \
.state = state_, \
.when = when_, \
.bscb = BOOT_STATE_CALLBACK_INIT(func_, arg_), \
}
#endif /* BOOTSTATE_H */