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| author | Achin Gupta <achin.gupta@arm.com> | 2014-01-18 16:50:09 +0000 |
|---|---|---|
| committer | Dan Handley <dan.handley@arm.com> | 2014-02-17 18:51:44 +0000 |
| commit | b739f22a99c96d5a295f083125505b5b5ec2f8b6 (patch) | |
| tree | faed79c3d8e505d3168aa0299aa68099cc3f4fe6 /common/psci/psci_entry.S | |
| parent | 65f0730ba34d5e22d3372cef76f048339d9c4588 (diff) | |
Setup VBAR_EL3 incrementally
This patch ensures that VBAR_EL3 points to the simple stack-less
'early_exceptions' when the C runtime stack is not correctly setup to
use the more complex 'runtime_exceptions'. It is initialised to
'runtime_exceptions' once this is done.
This patch also moves all exception vectors into a '.vectors' section
and modifies linker scripts to place all such sections together. This
will minimize space wastage from alignment restrictions.
Change-Id: I8c3e596ea3412c8bd582af9e8d622bb1cb2e049d
Diffstat (limited to 'common/psci/psci_entry.S')
| -rw-r--r-- | common/psci/psci_entry.S | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/common/psci/psci_entry.S b/common/psci/psci_entry.S index a6a1a6f0..28a41436 100644 --- a/common/psci/psci_entry.S +++ b/common/psci/psci_entry.S @@ -63,6 +63,17 @@ psci_aff_suspend_finish_entry: psci_aff_common_finish_entry: adr x22, psci_afflvl_power_on_finish + + /* --------------------------------------------- + * Exceptions should not occur at this point. + * Set VBAR in order to handle and report any + * that do occur + * --------------------------------------------- + */ + adr x0, early_exceptions + msr vbar_el3, x0 + isb + bl read_mpidr mov x19, x0 bl platform_set_coherent_stack @@ -90,6 +101,16 @@ psci_aff_common_finish_entry: mov x0, x19 bl platform_set_stack + /* --------------------------------------------- + * Now that the execution stack has been set + * up, enable full runtime exception handling. + * Since we're just about to leave this EL with + * ERET, we don't need an ISB here + * --------------------------------------------- + */ + adr x0, runtime_exceptions + msr vbar_el3, x0 + /* -------------------------------------------- * Use the size of the general purpose register * context to restore the register state |