aboutsummaryrefslogtreecommitdiff
path: root/lib/aarch64/sysreg_helpers.S
AgeCommit message (Collapse)Author
2014-06-10Make system register functions inline assemblyAndrew Thoelke
Replace the current out-of-line assembler implementations of the system register and system instruction operations with inline assembler. This enables better compiler optimisation and code generation when accessing system registers. Fixes ARM-software/tf-issues#91 Change-Id: I149af3a94e1e5e5140a3e44b9abfc37ba2324476
2014-05-22Use secure timer to generate S-EL1 interruptsAchin Gupta
This patch adds support in the TSP to program the secure physical generic timer to generate a EL-1 interrupt every half second. It also adds support for maintaining the timer state across power management operations. The TSPD ensures that S-EL1 can access the timer by programming the SCR_EL3.ST bit. This patch does not actually enable the timer. This will be done in a subsequent patch once the complete framework for handling S-EL1 interrupts is in place. Change-Id: I1b3985cfb50262f60824be3a51c6314ce90571bc
2014-05-16Rework BL3-1 unhandled exception handling and reportingSoby Mathew
This patch implements the register reporting when unhandled exceptions are taken in BL3-1. Unhandled exceptions will result in a dump of registers to the console, before halting execution by that CPU. The Crash Stack, previously called the Exception Stack, is used for this activity. This stack is used to preserve the CPU context and runtime stack contents for debugging and analysis. This also introduces the per_cpu_ptr_cache, referenced by tpidr_el3, to provide easy access to some of BL3-1 per-cpu data structures. Initially, this is used to provide a pointer to the Crash stack. panic() now prints the the error file and line number in Debug mode and prints the PC value in release mode. The Exception Stack is renamed to Crash Stack with this patch. The original intention of exception stack is no longer valid since we intend to support several valid exceptions like IRQ and FIQ in the trusted firmware context. This stack is now utilized for dumping and reporting the system state when a crash happens and hence the rename. Fixes ARM-software/tf-issues#79 Improve reporting of unhandled exception Change-Id: I260791dc05536b78547412d147193cdccae7811a
2014-05-07Remove unused or invalid asm helper functionsAndrew Thoelke
There are a small number of non-EL specific helper functions which are no longer used, and also some unusable helper functions for non-existant registers. This change removes all of these functions. Change-Id: Idd656cef3b59cf5c46fe2be4029d72288b649c24
2014-05-07Correct usage of data and instruction barriersAndrew Thoelke
The current code does not always use data and instruction barriers as required by the architecture and frequently uses barriers excessively due to their inclusion in all of the write_*() helper functions. Barriers should be used explicitly in assembler or C code when modifying processor state that requires the barriers in order to enable review of correctness of the code. This patch removes the barriers from the helper functions and introduces them as necessary elsewhere in the code. PORTING NOTE: check any port of Trusted Firmware for use of system register helper functions for reliance on the previous barrier behaviour and add explicit barriers as necessary. Fixes ARM-software/tf-issues#92 Change-Id: Ie63e187404ff10e0bdcb39292dd9066cb84c53bf
2014-05-06Reduce deep nesting of header filesDan Handley
Reduce the number of header files included from other header files as much as possible without splitting the files. Use forward declarations where possible. This allows removal of some unnecessary "#ifndef __ASSEMBLY__" statements. Also, review the .c and .S files for which header files really need including and reorder the #include statements alphabetically. Fixes ARM-software/tf-issues#31 Change-Id: Iec92fb976334c77453e010b60bcf56f3be72bd3e
2014-05-06Move include and source files to logical locationsDan Handley
Move almost all system include files to a logical sub-directory under ./include. The only remaining system include directories not under ./include are specific to the platform. Move the corresponding source files to match the include directory structure. Also remove pm.h as it is no longer used. Change-Id: Ie5ea6368ec5fad459f3e8a802ad129135527f0b3