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2014-02-20Factor out translation table setup in ARM FVP portAchin Gupta
This patch factors out the ARM FVP specific code to create MMU translation tables so that it is possible for a boot loader stage to create a different set of tables instead of using the default ones. The default translation tables are created with the assumption that the calling boot loader stage executes out of secure SRAM. This might not be true for the BL3_2 stage in the future. A boot loader stage can define the `fill_xlation_tables()` function as per its requirements. It returns a reference to the level 1 translation table which is used by the common platform code to setup the TTBR_EL3. This patch is a temporary solution before a larger rework of translation table creation logic is introduced. Change-Id: I09a075d5da16822ee32a411a9dbe284718fb4ff6
2014-02-20Rework BL2 to BL3-1 hand over interfaceAchin Gupta
This patch reworks BL2 to BL3-1 hand over interface by introducing a composite structure (bl31_args) that holds the superset of information that needs to be passed from BL2 to BL3-1. - The extents of secure memory available to BL3-1 - The extents of memory available to BL3-2 (not yet implemented) and BL3-3 - Information to execute BL3-2 (not yet implemented) and BL3-3 images This patch also introduces a new platform API (bl2_get_bl31_args_ptr) that needs to be implemented by the platform code to export reference to bl31_args structure which has been allocated in platform-defined memory. The platform will initialize the extents of memory available to BL3-3 during early platform setup in bl31_args structure. This obviates the need for bl2_get_ns_mem_layout platform API. BL2 calls the bl2_get_bl31_args_ptr function to get a reference to bl31_args structure. It uses the 'bl33_meminfo' field of this structure to load the BL3-3 image. It sets the entry point information for the BL3-3 image in the 'bl33_image_info' field of this structure. The reference to this structure is passed to the BL3-1 image. Also fixes issue ARM-software/tf-issues#25 Change-Id: Ic36426196dd5ebf89e60ff42643bed01b3500517
2014-02-20Add exception vector guardsJeenu Viswambharan
This patch adds guards so that an exception vector exceeding 32 instructions will generate a compile-time error. This keeps the exception handlers in check from spilling over. Change-Id: I7aa56dd0071a333664e2814c656d3896032046fe
2014-02-17Setup VBAR_EL3 incrementallyAchin Gupta
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
2014-02-17Fix spilled-over BL1 exception vectorJeenu Viswambharan
The SynchronousExceptionA64 vector has gone beyond the 32-instruction limit for individual exception vector. This patch splits and relocates the exception handler so that it fits into the 32-instruction window. Change-Id: Ic60c4fc3f09a1cb071d63ff0e58353ecaecbb62f
2014-02-17Move translation tables into separate sectionJeenu Viswambharan
This patch moves the translation tables into their own section. This saves space that would otherwise have been lost in padding due to page table alignment constraints. The BL31 and BL32 bases have been consequently adjusted. Change-Id: Ibd65ae8a5ce4c4ea9a71a794c95bbff40dc63e65
2014-02-17Fix asserts appearing in release buildsJames Morrissey
Also fix warnings generated in release builds when assert code is absent. Change-Id: I45b9173d3888f9e93e98eb5b4fdc06727ba5cbf4
2014-01-20Build system: minor spacing tidyupRyan Harkin
Tidy up the spacing of variable definitions within the makefiles to make them more consistent, easier to read and amend. Change-Id: Ic6d7c8489ca4330824abb5cd1ead8f1d449d1a85 Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>
2014-01-20Build system: Fixes #2: Add multi-platform supportRyan Harkin
Move all explicit platform or architecture specific references into a new platform.mk file that is defined for each platform. Change-Id: I9d6320d1ba957e0cc8d9b316b3578132331fa428 Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>
2014-01-20remove empty definition of display_boot_progress()Achin Gupta
This patch replaces the empty definition of display_boot_progress() in bl2_main.c with a weak definition. The former allowed bl2 to use the early_exceptions(). It is possible to do that with a simple weak definition as well. Change-Id: Idb3f425a5e265f3579b638e3d26bd8c9bb78f80d
2014-01-17Change comments in assembler files to help ctagsJeenu Viswambharan
Ctags seem to have a problem with generating tags for assembler symbols when a comment immediately follows an assembly label. This patch inserts a single space character between the label definition and the following comments to help ctags. The patch is generated by the command: git ls-files -- \*.S | xargs sed -i 's/^\([^:]\+\):;/\1: ;/1' Change-Id: If7a3c9d0f51207ea033cc8b8e1b34acaa0926475
2014-01-17Do not trap access to floating point registersHarry Liebel
Traps when accessing architectural features are disabled by clearing bits in CPTR_EL3 during early boot, including accesses to floating point registers. The value of this register was previously undetermined, causing unwanted traps to EL3. Future EL3 code (for example, context save/restore code) may use floating point registers, although they are not used by current code. Also, the '-mgeneral-regs-only' flag is enabled in the GCC settings to prevent generation of code that uses floating point registers. Change-Id: I9a03675f6387bbbee81a6f2c9ccf81150db03747
2014-01-17Update year in copyright text to 2014Dan Handley
Change-Id: Ic7fb61aabae1d515b9e6baf3dd003807ff42da60
2013-12-20Create local C library implementation (1/2)Harry Liebel
- This change is split into two separate patches in order to simplify the history as interpreted by 'git'. The split is between the move/rename and addition of new files. - Remove dependency on toolchain C library headers and functions in order to ensure behavioural compatibility between toolchains. - Use FreeBSD as reference for C library implementation. - Do not let GCC use default library include paths. - Remove unused definitions in modified headers and implementations. - Move C library files to 'lib/stdlib' and 'include/stdlib'. - Break std.c functions out into separate files. Change-Id: I91cddfb3229775f770ad781589670c57d347a154
2013-12-12Remove useless copies of meminfo structuresSandrine Bailleux
Platform setup code has to reserve some memory for storing the memory layout information. It is populated in early platform setup code. blx_get_sec_mem_layout() functions used to return a copy of this structure. This patch modifies blx_get_sec_mem_layout() functions so that they now directly return a pointer to their memory layout structure. It ensures that the memory layout returned by blx_get_sec_mem_layout() is always up-to-date and also avoids a useless copy of the meminfo structure. Also rename blx_get_sec_mem_layout() to blx_plat_sec_mem_layout() to make it clear those functions are platform specific. Change-Id: Ic7a6f9d6b6236b14865ab48a9f5eff545ce56551
2013-12-05Enable third party contributionsDan Handley
- Add instructions for contributing to ARM Trusted Firmware. - Update copyright text in all files to acknowledge contributors. Change-Id: I9311aac81b00c6c167d2f8c889aea403b84450e5
2013-12-05Properly initialise the C runtime environmentSandrine Bailleux
This patch makes sure the C runtime environment is properly initialised before executing any C code. - Zero-initialise NOBITS sections (e.g. the bss section). - Relocate BL1 data from ROM to RAM. Change-Id: I0da81b417b2f0d1f7ef667cc5131b1e47e22571f
2013-12-05Various improvements/cleanups on the linker scriptsSandrine Bailleux
- Check at link-time that bootloader images will fit in memory at run time and that they won't overlap each other. - Remove text and rodata orphan sections. - Define new linker symbols to remove the need for platform setup code to know the order of sections. - Reduce the size of the raw binary images by cutting some sections out of the disk image and allocating them at load time, whenever possible. - Rework alignment constraints on sections. - Remove unused linker symbols. - Homogenize linker symbols names across all BLs. - Add some comments in the linker scripts. Change-Id: I47a328af0ccc7c8ab47fcc0dc6e7dd26160610b9
2013-11-27Unmask SError and Debug exceptions.Sandrine Bailleux
Any asynchronous exception caused by the firmware should be handled in the firmware itself. For this reason, unmask SError exceptions (and Debug ones as well) on all boot paths. Also route external abort and SError interrupts to EL3, otherwise they will target EL1. Change-Id: I9c191d2d0dcfef85f265641c8460dfbb4d112092
2013-11-27Move generic architectural setup out of blx_plat_arch_setup().Sandrine Bailleux
blx_plat_arch_setup() should only perform platform-specific architectural setup, e.g. enabling the MMU. This patch moves generic architectural setup code out of blx_plat_arch_setup(). Change-Id: I4ccf56b8c4a2fa84909817779a2d97a14aaafab6
2013-10-25ARMv8 Trusted Firmware release v0.2v0.2Achin Gupta