diff options
Diffstat (limited to 'include/sysemu')
| -rw-r--r-- | include/sysemu/dma.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/sysemu/dma.h b/include/sysemu/dma.h index a052f7bca3..3201e7901d 100644 --- a/include/sysemu/dma.h +++ b/include/sysemu/dma.h @@ -296,4 +296,16 @@ uint64_t dma_buf_write(uint8_t *ptr, int32_t len, QEMUSGList *sg); void dma_acct_start(BlockBackend *blk, BlockAcctCookie *cookie, QEMUSGList *sg, enum BlockAcctType type); +/** + * dma_aligned_pow2_mask: Return the address bit mask of the largest + * power of 2 size less or equal than @end - @start + 1, aligned with @start, + * and bounded by 1 << @max_addr_bits bits. + * + * @start: range start address + * @end: range end address (greater than @start) + * @max_addr_bits: max address bits (<= 64) + */ +uint64_t dma_aligned_pow2_mask(uint64_t start, uint64_t end, + int max_addr_bits); + #endif |