| /* |
| * Copyright 2017, Data61 |
| * Commonwealth Scientific and Industrial Research Organisation (CSIRO) |
| * ABN 41 687 119 230. |
| * |
| * This software may be distributed and modified according to the terms of |
| * the BSD 2-Clause license. Note that NO WARRANTY is provided. |
| * See "LICENSE_BSD2.txt" for details. |
| * |
| * @TAG(DATA61_BSD) |
| */ |
| |
| #pragma once |
| |
| #define DMB() asm volatile("dmb" ::: "memory") |
| #define DSB() asm volatile("dsb" ::: "memory") |
| #define ISB() asm volatile("isb" ::: "memory") |
| #define IO_READ_MEM_BARRIER() DMB() |
| #define IO_WRITE_MEM_BARRIER() DMB() |
| |
| /* Helper for forcing a read and returning a value |
| * |
| * Forces a memory read access to the given address. |
| */ |
| static inline uintptr_t force_read_value(uintptr_t *address) { |
| uintptr_t value; |
| asm volatile ("mov %[val], %[addr]" |
| : [val]"=r"(value) |
| : [addr]"r"(*address) |
| /* no clobbers */ |
| ); |
| return value; |
| } |
