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 <achin.gupta@arm.com>
diff --git a/common/runtime_svc.c b/common/runtime_svc.c
index 0ea1bf5..6e8a1bb 100644
--- a/common/runtime_svc.c
+++ b/common/runtime_svc.c
@@ -41,6 +41,7 @@
#include <runtime_svc.h>
#include <context.h>
#include <debug.h>
+#include <context_mgmt.h>
/*******************************************************************************
* The 'rt_svc_descs' array holds the runtime service descriptors exported by
@@ -146,7 +147,7 @@
void fault_handler(void *handle)
{
- gp_regs_next *gpregs_ctx = get_gpregs_ctx(handle);
+ gp_regs *gpregs_ctx = get_gpregs_ctx(handle);
ERROR("Unhandled synchronous fault. Register dump @ 0x%x \n",
gpregs_ctx);
panic();