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authorAndre Przywara <andre.przywara@linaro.org>2013-09-19 18:06:44 +0200
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2013-10-03 21:28:51 +0200
commitba6a1698116da272f14c53a3ae41467cb7fc4372 (patch)
tree135476d83f61ee09d473a66a2a341290cb050307 /include
parentbb975455650b1f36681de31a93ffe54952ed3a6b (diff)
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ARM: add SMP support for non-secure switch
Currently the non-secure switch is only done for the boot processor. To enable full SMP support, we have to switch all secondary cores into non-secure state also. So we add an entry point for secondary CPUs coming out of low-power state and make sure we put them into WFI again after having switched to non-secure state. For this we acknowledge and EOI the wake-up IPI, then go into WFI. Once being kicked out of it later, we sanity check that the start address has actually been changed (since another attempt to switch to non-secure would block the core) and jump to the new address. The actual CPU kick is done by sending an inter-processor interrupt via the GIC to all CPU interfaces except the requesting processor. The secondary cores will then setup their respective GIC CPU interface. While this approach is pretty universal across several ARMv7 boards, we make this function weak in case someone needs to tweak this for a specific board. The way of setting the secondary's start address is board specific, but mostly different only in the actual SMP pen address, so we also provide a weak default implementation and just depend on the proper address to be set in the config file. Signed-off-by: Andre Przywara <andre.przywara@linaro.org>
Diffstat (limited to 'include')
-rw-r--r--include/common.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/common.h b/include/common.h
index 8addf43..4d2a56d 100644
--- a/include/common.h
+++ b/include/common.h
@@ -627,6 +627,8 @@ void ft_pci_setup(void *blob, bd_t *bd);
#endif
#endif
+void smp_set_core_boot_addr(unsigned long addr, int corenr);
+void smp_kick_all_cpus(void);
/* $(CPU)/serial.c */
int serial_init (void);