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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2021-08-04 14:21:34 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2021-08-12 10:04:11 +0200 |
| commit | 59472042ec0ef4b501df675f4df75e377994c92c (patch) | |
| tree | 166041afc39d65df712115f6c298db494d75c035 /bsps/arm/shared | |
| parent | Test needed for timer_create with CLOCK_MONOTONC (diff) | |
| download | rtems-59472042ec0ef4b501df675f4df75e377994c92c.tar.bz2 | |
bsps/arm: More robust SMP start
Do not continue execution on processors which are not configured to prevent the
use of arbitrary memory for the initialization stack.
Diffstat (limited to 'bsps/arm/shared')
| -rw-r--r-- | bsps/arm/shared/start/start.S | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/bsps/arm/shared/start/start.S b/bsps/arm/shared/start/start.S index bc87e7b36d..55b5b8d78c 100644 --- a/bsps/arm/shared/start/start.S +++ b/bsps/arm/shared/start/start.S @@ -197,9 +197,21 @@ _start: /* Read MPIDR and get current processor index */ mrc p15, 0, r7, c0, c0, 5 and r7, #0xff -#endif -#ifdef RTEMS_SMP + /* + * Check that this is a configured processor. If not, then there is + * not much what can be done since we do not have a stack available for + * this processor. Just loop forever in this case. + */ + ldr r1, =_SMP_Processor_configured_maximum + ldr r1, [r1] + cmp r1, r7 + bgt .Lconfigured_processor +.Linvalid_processor_wait_for_ever: + wfe + b .Linvalid_processor_wait_for_ever +.Lconfigured_processor: + /* * Get current per-CPU control and store it in PL1 only Thread ID * Register (TPIDRPRW). |