From caa84939a4d8b1189dea8619ccc57bdb3026b125 Mon Sep 17 00:00:00 2001 From: Jeenu Viswambharan Date: Thu, 6 Feb 2014 10:36:15 +0000 Subject: Add support for handling runtime service requests This patch uses the reworked exception handling support to handle runtime service requests through SMCs following the SMC calling convention. This is a giant commit since all the changes are inter-related. It does the following: 1. Replace the old exception handling mechanism with the new one 2. Enforce that SP_EL0 is used C runtime stacks. 3. Ensures that the cold and warm boot paths use the 'cpu_context' structure to program an ERET into the next lower EL. 4. Ensures that SP_EL3 always points to the next 'cpu_context' structure prior to an ERET into the next lower EL 5. Introduces a PSCI SMC handler which completes the use of PSCI as a runtime service Change-Id: I661797f834c0803d2c674d20f504df1b04c2b852 Co-authored-by: Achin Gupta --- common/psci/psci_private.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'common/psci/psci_private.h') diff --git a/common/psci/psci_private.h b/common/psci/psci_private.h index de9c2917..3d7ae749 100644 --- a/common/psci/psci_private.h +++ b/common/psci/psci_private.h @@ -151,6 +151,16 @@ extern int psci_afflvl_suspend(unsigned long, int, int); extern unsigned int psci_afflvl_suspend_finish(unsigned long, int, int); + +/* Private exported functions from psci_main.c */ +extern uint64_t psci_smc_handler(uint32_t smc_fid, + uint64_t x1, + uint64_t x2, + uint64_t x3, + uint64_t x4, + void *cookie, + void *handle, + uint64_t flags); #endif /*__ASSEMBLY__*/ #endif /* __PSCI_PRIVATE_H__ */ -- cgit