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lib/thread,lib/hardwaremain: Lazy initialize threads

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By lazy initializing the threads, if a stage doesn't use them, they will
be garbage collected.

BUG=b:179699789
TEST=Boot guybrush to the OS and verify threads worked

Suggested-by: Julius Werner <jwerner@chromium.org>
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I7208ffb5dcda63d916bc6cfdea28d92a62435da6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56532
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Raul E Rangel
2021-07-22 11:16:19 -06:00
committed by Patrick Georgi
parent 7db7ee984c
commit a2d83c68a3
3 changed files with 10 additions and 5 deletions
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11
src/lib/thread.c
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@@ -257,13 +257,16 @@ static void *thread_alloc_space(struct thread *t, size_t bytes)
return (void *)t->stack_current;
}
void threads_initialize(void)
static void threads_initialize(void)
{
int i;
struct thread *t;
u8 *stack_top;
struct cpu_info *ci;
if (initialized)
return;
/* `cpu_info()` requires the stacks to be STACK_SIZE aligned */
assert(IS_ALIGNED((uintptr_t)thread_stacks, CONFIG_STACK_SIZE));
@@ -295,6 +298,9 @@ int thread_run(struct thread_handle *handle, enum cb_err (*func)(void *), void *
struct thread *current;
struct thread *t;
/* Lazy initialization */
threads_initialize();
current = current_thread();
if (!thread_can_yield(current)) {
@@ -327,6 +333,9 @@ int thread_run_until(struct thread_handle *handle, enum cb_err (*func)(void *),
if (!ENV_RAMSTAGE)
dead_code();
/* Lazy initialization */
threads_initialize();
current = current_thread();
if (!thread_can_yield(current)) {