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| author | Soby Mathew <soby.mathew@arm.com> | 2015-09-03 18:29:38 +0100 |
|---|---|---|
| committer | Soby Mathew <soby.mathew@arm.com> | 2015-12-04 12:02:12 +0000 |
| commit | 02446137a4e2a504706fb1f4059467643e2930a5 (patch) | |
| tree | 765f2c757d123cf6c63157cb9d2972008a7773c0 /docs/user-guide.md | |
| parent | 404dba53ef9be643f80babdd4ab81501bdbaba16 (diff) | |
Enable use of FIQs and IRQs as TSP interrupts
On a GICv2 system, interrupts that should be handled in the secure world are
typically signalled as FIQs. On a GICv3 system, these interrupts are signalled
as IRQs instead. The mechanism for handling both types of interrupts is the same
in both cases. This patch enables the TSP to run on a GICv3 system by:
1. adding support for handling IRQs in the exception handling code.
2. removing use of "fiq" in the names of data structures, macros and functions.
The build option TSPD_ROUTE_IRQ_TO_EL3 is deprecated and is replaced with a
new build flag TSP_NS_INTR_ASYNC_PREEMPT. For compatibility reasons, if the
former build flag is defined, it will be used to define the value for the
new build flag. The documentation is also updated accordingly.
Change-Id: I1807d371f41c3656322dd259340a57649833065e
Diffstat (limited to 'docs/user-guide.md')
| -rw-r--r-- | docs/user-guide.md | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/docs/user-guide.md b/docs/user-guide.md index bcdc645d..716ed7d8 100644 --- a/docs/user-guide.md +++ b/docs/user-guide.md @@ -278,10 +278,13 @@ performed. (Coherent memory region is included) or 0 (Coherent memory region is excluded). Default is 1. -* `TSPD_ROUTE_IRQ_TO_EL3`: A non zero value enables the routing model - for non-secure interrupts in which they are routed to EL3 (TSPD). The - default model (when the value is 0) is to route non-secure interrupts - to S-EL1 (TSP). +* `TSP_NS_INTR_ASYNC_PREEMPT`: A non zero value enables the interrupt + routing model which routes non-secure interrupts asynchronously from TSP + to EL3 causing immediate preemption of TSP. The EL3 is responsible + for saving and restoring the TSP context in this routing model. The + default routing model (when the value is 0) is to route non-secure + interrupts to TSP allowing it to save its context and hand over + synchronously to EL3 via an SMC. * `TRUSTED_BOARD_BOOT`: Boolean flag to include support for the Trusted Board Boot feature. When set to '1', BL1 and BL2 images include support to load |