Possible thread stack implementation.
Architecture provides a function for thread stack base, thread code uses it. Build and boot tested on Falco with multitasking on and off. Change-Id: I5016fab47f9954379acf7702ac7965b0a70c88ed Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: https://gerrit.chromium.org/gerrit/66578 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Commit-Queue: Ronald G. Minnich <rminnich@chromium.org> Tested-by: Ronald G. Minnich <rminnich@chromium.org> (cherry picked from commit 3c6afef30c1a0ad6fba0fb76acc792184d924247) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6513 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
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@ -56,3 +56,10 @@ void arch_prepare_thread(struct thread *t,
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t->stack_current = stack;
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}
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void *arch_get_thread_stackbase(void)
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{
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/* defined in c_start.S */
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extern u8 thread_stacks[];
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return &thread_stacks[0];
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}
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@ -38,6 +38,11 @@ struct thread {
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};
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void threads_initialize(void);
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/* Get the base of the thread stacks.
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* Returns pointer to CONFIG_NUM_THREADS*CONFIG_STACK_SIZE contiguous bytes
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* aligned to CONFIG_STACK_SIZE, or NULL.
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*/
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void *arch_get_thread_stackbase(void);
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/* Run func(arrg) on a new thread. Return 0 on successful start of thread, < 0
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* when thread could not be started. Note that the thread will block the
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* current state in the boot state machine until it is complete. */
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@ -28,7 +28,6 @@ static void idle_thread_init(void);
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/* There needs to be at least one thread to run the ramstate state machine. */
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#define TOTAL_NUM_THREADS (CONFIG_NUM_THREADS + 1)
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extern char thread_stacks[CONFIG_NUM_THREADS*CONFIG_STACK_SIZE];
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/* Storage space for the thread structs .*/
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static struct thread all_threads[TOTAL_NUM_THREADS];
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@ -259,8 +258,11 @@ void threads_initialize(void)
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{
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int i;
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struct thread *t;
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char *stack_top;
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u8 *stack_top;
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struct cpu_info *ci;
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u8 *thread_stacks;
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thread_stacks = arch_get_thread_stackbase();
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/* Initialize the BSP thread first. The cpu_info structure is assumed
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* to be just under the top of the stack. */
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