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| author | Sandrine Bailleux <sandrine.bailleux@arm.com> | 2013-11-28 09:43:06 +0000 |
|---|---|---|
| committer | Dan Handley <dan.handley@arm.com> | 2013-12-05 11:33:15 +0000 |
| commit | 65f546a14fbc0438c051b4243f71abd2206a7307 (patch) | |
| tree | 1187ac9d3eb596ecb61ac4568969041392764a14 /bl31/aarch64 | |
| parent | 8d69a03f6a7db3c437b7cfdd15402627277d8cb4 (diff) | |
| download | arm-trusted-firmware-65f546a14fbc0438c051b4243f71abd2206a7307.tar.gz | |
Properly initialise the C runtime environment
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
Diffstat (limited to 'bl31/aarch64')
| -rw-r--r-- | bl31/aarch64/bl31_entrypoint.S | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/bl31/aarch64/bl31_entrypoint.S b/bl31/aarch64/bl31_entrypoint.S index cb481b8..13725d7 100644 --- a/bl31/aarch64/bl31_entrypoint.S +++ b/bl31/aarch64/bl31_entrypoint.S @@ -93,6 +93,20 @@ bl31_entrypoint:; .type bl31_entrypoint, %function bl platform_is_primary_cpu cbz x0, _panic + /* --------------------------------------------- + * Zero out NOBITS sections. There are 2 of them: + * - the .bss section; + * - the coherent memory section. + * --------------------------------------------- + */ + ldr x0, =__BSS_START__ + ldr x1, =__BSS_SIZE__ + bl zeromem16 + + ldr x0, =__COHERENT_RAM_START__ + ldr x1, =__COHERENT_RAM_UNALIGNED_SIZE__ + bl zeromem16 + /* -------------------------------------------- * Give ourselves a small coherent stack to * ease the pain of initializing the MMU |