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Diffstat (limited to 'lib/aarch32/cache_helpers.S')
| -rw-r--r-- | lib/aarch32/cache_helpers.S | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/aarch32/cache_helpers.S b/lib/aarch32/cache_helpers.S index 57b6b384..810af0f0 100644 --- a/lib/aarch32/cache_helpers.S +++ b/lib/aarch32/cache_helpers.S @@ -20,6 +20,9 @@ * This macro can be used for implementing various data cache operations `op` */ .macro do_dcache_maintenance_by_mva op, coproc, opc1, CRn, CRm, opc2 + /* Exit early if size is zero */ + cmp r1, #0 + beq exit_loop_\op dcache_line_size r2, r3 add r1, r0, r1 sub r3, r2, #1 @@ -30,6 +33,7 @@ loop_\op: cmp r0, r1 blo loop_\op dsb sy +exit_loop_\op: bx lr .endm |