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  1. 29 Oct, 2018 1 commit
    • Soby Mathew's avatar
      Add helper to return reference to a symbol · 6a7b3005
      Soby Mathew authored 
      

This patch adds a utility function to return
the address of a symbol. By default, the compiler
generates adr/adrp instruction pair to return
the reference and this utility is used to override
this compiler generated to code and use `ldr`
instruction.

This is needed for Position Independent Executable
when it needs to reference a symbol which is constant
and does not depend on the execute address of the
binary.

For example, on the FVP, the GICv3 register context is
stored in a secure carveout (arm_el3_tzc_dram) within
DDR and does not relocate with the BL image. Now if
BL31 is executing at a different address other than
the compiled address, using adrp/adr instructions to
reference this memory will not work as they generate an
address that is PC relative. The way to get around this
problem is to reference it as non-PC relative (i.e
non-relocatable location) via `ldr` instruction.

Change-Id: I5008a951b007144258121690afb68dc8e12ee6f7
Signed-off-by: default avatarSoby Mathew <soby.mathew@arm.com>
      6a7b3005
  3. 26 Oct, 2018 2 commits
    • Roberto Vargas's avatar
      Convert arm_setup_page_tables into a generic helper · 0916c38d
      Roberto Vargas authored 
      

This function is not related to Arm platforms and can be reused by other
platforms if needed.

Change-Id: Ia9c328ce57ce7e917b825a9e09a42b0abb1a53e8
Co-authored-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      0916c38d
    • Antonio Nino Diaz's avatar
      xlat: Fix compatibility between v1 and v2 · 03987d01
      Antonio Nino Diaz authored 
      

There are several platforms using arm_setup_page_tables(), which is
supposed to be Arm platform only. This creates several dependency
problems between platforms.

This patch adds the definition XLAT_TABLES_LIB_V2 to the xlat tables lib
v2 makefile. This way it is possible to detect from C code which version
is being used and include the correct header.

The file arm_xlat_tables.h has been renamed to xlat_tables_compat.h and
moved to a common folder. This way, when in doubt, this header can be
used to guarantee compatibility, as it includes the correct header based
on XLAT_TABLES_LIB_V2.

This patch also removes the usage of ARM_XLAT_TABLES_V1 from QEMU (so
that is now locked in xlat lib v2) and ZynqMP (where it was added as a
workaround).

Change-Id: Ie1e22a23b44c549603d1402a237a70d0120d3e04
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      03987d01
  5. 23 Oct, 2018 4 commits
  7. 19 Oct, 2018 1 commit
    • Soby Mathew's avatar
      Multi-console: Deprecate the `finish_console_register` macro · cc5859ca
      Soby Mathew authored 
      

The `finish_console_register` macro is used by the multi console
framework to register the `console_t` driver callbacks. It relied
on weak references to the `ldr` instruction to populate 0 to the
callback in case the driver has not defined the appropriate
function. Use of `ldr` instruction to load absolute address to a
reference makes the binary position dependant. These instructions
should be replaced with adrp/adr instruction for position independant
executable(PIE). But adrp/adr instructions don't work well with weak
references as described in GNU ld bugzilla issue 22589.

This patch defines a new version of `finish_console_register` macro
which can spcify which driver callbacks are valid and deprecates the
old one. If any of the argument is not specified, then the macro
populates 0 for that callback. Hence the functionality of the previous
deprecated macro is preserved. The USE_FINISH_CONSOLE_REG_2 define
is used to select the new variant of the macro and will be removed
once the deprecated variant is removed.

All the upstream console drivers have been migrated to use the new
macro in this patch.

NOTE: Platforms be aware that the new variant of the
`finish_console_register` should be used and the old variant is
deprecated.

Change-Id: Ia6a67aaf2aa3ba93932992d683587bbd0ad25259
Signed-off-by: default avatarSoby Mathew <soby.mathew@arm.com>
      cc5859ca
  9. 16 Oct, 2018 2 commits
  11. 15 Oct, 2018 5 commits
  13. 11 Oct, 2018 3 commits
    • Sathees Balya's avatar
      plat/arm: Fix misra warnings in platform code · 89509904
      Sathees Balya authored 
      

Change-Id: Ica944acc474a099219d50b041cfaeabd4f3d362f
Signed-off-by: default avatarSathees Balya <sathees.balya@arm.com>
      89509904
    • Sandrine Bailleux's avatar
      Introduce object pool allocator · 9cc4651c
      Sandrine Bailleux authored 
      

The object pool allocator provides a simplistic interface to manage
allocation in a fixed-size static array. The caller creates a static
"object pool" out of such an array and may then call pool_alloc() to
get the next available object within the pool. There is also a variant
to get multiple consecutive objects: pool_alloc_n().

Note that this interface does not provide any way to free the objects
afterwards. This is by design and it is not a limitation. We do not
want to introduce complexity induced by memory freeing, such as
use-after-free bugs, memory fragmentation and so on.

Change-Id: Iefc2e153767851fbde5841a295f92ae48adda71f
Signed-off-by: default avatarSandrine Bailleux <sandrine.bailleux@arm.com>
      9cc4651c
    • Antonio Nino Diaz's avatar
      plat/arm: Remove file arm_board_def.h · 0f58d4f2
      Antonio Nino Diaz authored 
      

This file is shared between FVP and all CSS platforms. While it may be
true that some definitions can be common, it doesn't make sense
conceptually. For example, the stack size depends on the platform and so
does the SRAM size.

After removing them, there are not enough common definitions to justify
having this header, so the other definitions have been moved to the
platform_def.h of FVP, board_css_def.h and arm_def.h.

Change-Id: Ifbf4b017227f9dfefa1a430f67d7d6baae6a4ba1
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      0f58d4f2
  15. 10 Oct, 2018 2 commits
  17. 09 Oct, 2018 1 commit
  19. 07 Oct, 2018 1 commit
  21. 04 Oct, 2018 1 commit
  23. 03 Oct, 2018 2 commits
    • Daniel Boulby's avatar
      FVP: Reclaim init code for the stack · cb4adb0d
      Daniel Boulby authored 
      

Map the initialization code for BL31 to overlap with the memory
required for the secondary cores stack. Once BL31 has been
initialized the memory can be remapped to RW data so that it can
be used for secondary cores stacks. By moving code from .text to
.text.init the size of the BL31 image is decreased by a page.

Split arm_common.ld.S into two linker scripts, one for tzc_dram
(arm_tzc_dram.ld.S) and one for reclaiming initialization code
(arm_reclaim_init.ld.S) so that platforms can chose which memory
regions they wish to include.

Change-Id: I648e88f3eda1aa71765744cf34343ecda9320b32
Signed-off-by: default avatarDaniel Boulby <daniel.boulby@arm.com>
      cb4adb0d
    • Daniel Boulby's avatar
      Introduce RECLAIM_INIT_CODE build flag · 1dcc28cf
      Daniel Boulby authored 
      

This patch introduces a build flag "RECLAIM_INIT_CODE" to mark boot time
code which allows platforms to place this memory in an appropriate
section to be reclaimed later. This features is primarily targeted for
BL31. Appropriate documentation updates are also done.

Change-Id: If0ca062851614805d769c332c771083d46599194
Signed-off-by: default avatarDaniel Boulby <daniel.boulby@arm.com>
      1dcc28cf
  25. 02 Oct, 2018 1 commit
    • Antonio Nino Diaz's avatar
      plat/arm: Remove option ARM_BOARD_OPTIMISE_MEM · c0740e4f
      Antonio Nino Diaz authored 
      

This option makes it hard to optimize the memory definitions of all Arm
platforms because any change in the common defines must work in all of
them. The best thing to do is to remove it and move the definition to
each platform's header.

FVP, SGI and SGM were using the definitions in board_arm_def.h. The
definitions have been copied to each platform's platform_def.h. Juno
was already using the ones in platform_def.h, so there have been no
changes.

Change-Id: I9aecd11bbc72a3d0d7aad1ef9934d8df21dcfaf2
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      c0740e4f
  27. 28 Sep, 2018 14 commits