diff options
Diffstat (limited to 'include/exec/memattrs.h')
| -rw-r--r-- | include/exec/memattrs.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h index e601061848..d4a1642098 100644 --- a/include/exec/memattrs.h +++ b/include/exec/memattrs.h @@ -46,4 +46,14 @@ typedef struct MemTxAttrs { */ #define MEMTXATTRS_UNSPECIFIED ((MemTxAttrs) { .unspecified = 1 }) +/* New-style MMIO accessors can indicate that the transaction failed. + * A zero (MEMTX_OK) response means success; anything else is a failure + * of some kind. The memory subsystem will bitwise-OR together results + * if it is synthesizing an operation from multiple smaller accesses. + */ +#define MEMTX_OK 0 +#define MEMTX_ERROR (1U << 0) /* device returned an error */ +#define MEMTX_DECODE_ERROR (1U << 1) /* nothing at that address */ +typedef uint32_t MemTxResult; + #endif |