This patch adds the following support to the BL3-1 stage:
1. BL3-1 allows runtime services to specify and determine the security
state of the next image after BL3-1. This has been done by adding
the `bl31_set_next_image_type()` & `bl31_get_next_image_type()`
apis. The default security state is non-secure. The platform api
`bl31_get_next_image_info()` has been modified to let the platform
decide which is the next image in the desired security state.
2. BL3-1 exports the `bl31_prepare_next_image_entry()` function to
program entry into the target security state. It uses the apis
introduced in 1. to do so.
3. BL3-1 reads the information populated by BL2 about the BL3-2 image
into its internal data structures.
4. BL3-1 introduces a weakly defined reference `bl32_init()` to allow
initialisation of a BL3-2 image. A runtime service like the Secure
payload dispatcher will define this function if present.
Change-Id: Icc46dcdb9e475ce6575dd3f9a5dc7a48a83d21d1
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>
This patch introduces the framework to enable registration and
initialisation of runtime services. PSCI is registered and initialised
as a runtime service. Handling of runtime service requests will be
implemented in subsequent patches.
Change-Id: Id21e7ddc5a33d42b7d6e455b41155fc5441a9547
This patch adds support for a cpu context management library. This
library will be used to:
1. Share pointers to secure and non-secure state cpu contexts between
runtime services e.g. PSCI and Secure Payload Dispatcher services
2. Set SP_EL3 to a context structure which will be used for
programming an ERET into a lower EL
3. Provide wrapper functions to save and restore EL3 & EL1
state. These functions will in turn use the helper functions in
context.S
Change-Id: I655eeef83dcd2a0c6f2eb2ac23efab866ac83ca0
ns_entry_info used to be a per-cpu array. This is a waste of space
because it is only accessed by the primary CPU on the cold boot path.
This patch reduces ns_entry_info to a single-cpu area.
Change-Id: I647c70c4e76069560f1aaad37a1d5910f56fba4c
- Add instructions for contributing to ARM Trusted Firmware.
- Update copyright text in all files to acknowledge contributors.
Change-Id: I9311aac81b00c6c167d2f8c889aea403b84450e5
Achin Gupta
Jeenu Viswambharan
Dan Handley
Sandrine Bailleux