optee_design.md: add picture to MMU section

xlat_table.png is generated with the command:
    dot -Tpng xlat_table.dot > xlat_table.png

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Reviewed-by: Pascal Brand <pascal.brand@linaro.org>
Fixes in trace refactoring

- Deprecates ATAMSG
- trace_ext.c is arm32 specific
- tee_kta_trace.h and trace_ta.h are generic
- Default level is now 1 (was 2)

Signed-off-by: Pascal Brand <pascal.brand@st.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Make function tee_cryp_init() generic

Signed-off-by: Pascal Brand <pascal.brand@st.com>
Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Move bget to libutils replacing dlmalloc

* Moves bget to libutils replacing dlmalloc as kernel memory allocator
* Restores the code formatting of bget.{c,h} to the original state as
  parts of the current code was unreadable
* Adds malloc_add_pool() to make use of previously unused memory
* Moves call to malloc_init() into platform specific code
* Restores MDBG into working condition
* Adds memalign function to bget.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Tested-by: Jens Wiklander <jens.wiklander@linaro.org> (QEMU virt platform)
Tested-by: Jerome Forissier <jerome.forissier@linaro.org> (FVP)
Reviewed-by: Etienne Carriere <etienne.carriere@st.com>
Tested-by: Pascal Brand <pascal.brand@linaro.org> (STM platform)
travis: Add CFG_TEE_FW_DEBUG=1 to qemu_virt

Adds CFG_TEE_FW_DEBUG=1 compilation for PLATFORM=vexpress-qemu_virt

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
plat-stm: L2CC_MUTEX implementation

Signed-off-by: Pascal Brand <pascal.brand@st.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
plat-stm: fix TA L1 table handling

bugz: https://bugzilla.bri.st.com/show_bug.cgi?id=6613

There is only 1 mmu table effectively used to map TAs: one
1 at mapped at a given time.

SEC_TA_MMU_TTB_FLD must be aligned, with an alignment constraint
defined from number of 1MB section entries in the user mapping.

SEC_TA_MMU_TTB_FLD could be allocated at run time.

Cleanup linker file: remove useless CTX_MEM and optimize a bit
stacks and mmu tables location.

Reviewed-on: https://gerrit.st.com/17038
Tested-by: Etienne CARRIERE <etienne.carriere@st.com>
Reviewed-by: Pascal BRAND <pascal.brand@st.com>
Reviewed-by: Etienne CARRIERE <etienne.carriere@st.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Pascal Brand <pascal.brand@st.com>
plat-stm: set L2 prefetch offset to 7

Reviewed-on: https://gerrit.st.com/17052
Reviewed-by: Etienne CARRIERE <etienne.carriere@st.com>
Tested-by: Etienne CARRIERE <etienne.carriere@st.com>
Reviewed-by: Pascal BRAND <pascal.brand@st.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Pascal Brand <pascal.brand@st.com>
plat-stm: clean tz init and l2 init/enable

Useless config of read-only reg SCU_CONFIG.

L2 FLZW feature: must be set in core after L2 is configured
and enable. TZ inits default not set core FLZ. L2 enable
sets core FLZ.

Rename PL310_WAY_SIZE into PL310_LINE_SIZE.

Reviewed-on: https://gerrit.st.com/17060
Reviewed-by: Etienne CARRIERE <etienne.carriere@st.com>
Tested-by: Etienne CARRIERE <etienne.carriere@st.com>
Reviewed-by: Pascal BRAND <pascal.brand@st.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Tested-by: Pascal Brand <pascal.brand@linaro.org> (STM platform)
Signed-off-by: Pascal Brand <pascal.brand@st.com>
MAC operations now supports NULL arguments

MAC algorithms support NULL arguments and zero length strings.

Note that the fix consists in a change of API in the internal crypto
interface. This change make hash_ops and mac_ops look the same in terms of
update and final step

Signed-off-by: Pascal Brand <pascal.brand@st.com>
Tested-by: Pascal Brand <pascal.brand@linaro.org> (STM platform)
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
mk/checkconf.mk: add utility functions to test configuration variables

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Select cryptographic algorithms at compile time

Allows to disable some cryptographic algorithms by setting make variables
at build time (either from the environment, the command line or by editing
core/lib/libtomcrypt/sub.mk).

For example:
$ make ... CFG_CRYPTO=n
$ make ... CFG_CRYPTO_DES=n

This can reduce the size of the TEE binary as well as its memory footprint:

$ make -j9 PLATFORM=vexpress-qemu_virt DEBUG= all mem_usage
$ grep RAM out/arm32-plat-vexpress/core/tee.mem_usage
RAM Usage        7DF00000 - 7DF39280 size 00039280 229 KiB 58 pages
$ du -h out/arm32-plat-vexpress/core/tee.bin
164K	out/arm32-plat-vexpress/core/tee.bin

$ make -j9 PLATFORM=vexpress-qemu_virt DEBUG= CFG_CRYPTO=n all mem_usage
$ grep RAM out/arm32-plat-vexpress/core/tee.mem_usage
RAM Usage        7DF00000 - 7DF1D280 size 0001D280 117 KiB 30 pages
$ du -h out/arm32-plat-vexpress/core/tee.bin
104K	out/arm32-plat-vexpress/core/tee.bin

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Tested-by: Jerome Forissier <jerome.forissier@linaro.org> (QEMU virt, FVP)
Reviewed-by: Pascal Brand <pascal.brand@linaro.org>
Tested-by: Pascal Brand <pascal.brand@linaro.org> (STM platform)