diff options
| author | Soby Mathew <soby.mathew@arm.com> | 2014-07-14 16:57:23 +0100 |
|---|---|---|
| committer | Soby Mathew <soby.mathew@arm.com> | 2014-07-28 10:44:04 +0100 |
| commit | c67b09bd2cf04cac2160968907f0a9fc65472a11 (patch) | |
| tree | cc7c2fed516e42070feb9d6cffb3d94be01e569e /include/common/asm_macros.S | |
| parent | 462c8350f6ed6b950609de1f72f00098440d3354 (diff) | |
Introduce crash console APIs for crash reporting
This patch introduces platform APIs to initialise and
print a character on a designated crash console.
For the FVP platform, PL011_UART0 is the designated
crash console. The platform porting guide is also updated
to document the new APIs.
Change-Id: I5e97d8762082e0c88c8c9bbb479353eac8f11a66
Diffstat (limited to 'include/common/asm_macros.S')
| -rw-r--r-- | include/common/asm_macros.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/common/asm_macros.S b/include/common/asm_macros.S index 2bccf581..238fa82a 100644 --- a/include/common/asm_macros.S +++ b/include/common/asm_macros.S @@ -162,3 +162,36 @@ wait_for_entrypoint: .macro get_up_stack _name, _size ldr x0, =(\_name + \_size) .endm + + /* + * Helper macro to generate the best mov/movk combinations according + * the value to be moved. The 16 bits from '_shift' are tested and + * if not zero, they are moved into '_reg' without affecting + * other bits. + */ + .macro _mov_imm16 _reg, _val, _shift + .if (\_val >> \_shift) & 0xffff + .if (\_val & (1 << \_shift - 1)) + movk \_reg, (\_val >> \_shift) & 0xffff, LSL \_shift + .else + mov \_reg, \_val & (0xffff << \_shift) + .endif + .endif + .endm + + /* + * Helper macro to load arbitrary values into 32 or 64-bit registers + * which generates the best mov/movk combinations. Many base addresses + * are 64KB aligned the macro will eliminate updating bits 15:0 in + * that case + */ + .macro mov_imm _reg, _val + .if (\_val) == 0 + mov \_reg, #0 + .else + _mov_imm16 \_reg, (\_val), 0 + _mov_imm16 \_reg, (\_val), 16 + _mov_imm16 \_reg, (\_val), 32 + _mov_imm16 \_reg, (\_val), 48 + .endif + .endm |