diff options
| -rw-r--r-- | hw/dma/xlnx-zdma.c | 47 |
1 files changed, 22 insertions, 25 deletions
diff --git a/hw/dma/xlnx-zdma.c b/hw/dma/xlnx-zdma.c index e856d233f2..1c45367f3c 100644 --- a/hw/dma/xlnx-zdma.c +++ b/hw/dma/xlnx-zdma.c @@ -333,10 +333,28 @@ static void zdma_load_src_descriptor(XlnxZDMA *s) } } +static void zdma_update_descr_addr(XlnxZDMA *s, bool type, + unsigned int basereg) +{ + uint64_t addr, next; + + if (type == DTYPE_LINEAR) { + addr = zdma_get_regaddr64(s, basereg); + next = addr + sizeof(s->dsc_dst); + } else { + addr = zdma_get_regaddr64(s, basereg); + addr += sizeof(s->dsc_dst); + address_space_read(s->dma_as, addr, s->attr, (void *) &next, 8); + } + + zdma_put_regaddr64(s, basereg, next); +} + static void zdma_load_dst_descriptor(XlnxZDMA *s) { uint64_t dst_addr; unsigned int ptype = ARRAY_FIELD_EX32(s->regs, ZDMA_CH_CTRL0, POINT_TYPE); + bool dst_type; if (ptype == PT_REG) { memcpy(&s->dsc_dst, &s->regs[R_ZDMA_CH_DST_DSCR_WORD0], @@ -349,24 +367,10 @@ static void zdma_load_dst_descriptor(XlnxZDMA *s) if (!zdma_load_descriptor(s, dst_addr, &s->dsc_dst)) { ARRAY_FIELD_DP32(s->regs, ZDMA_CH_ISR, AXI_RD_DST_DSCR, true); } -} - -static uint64_t zdma_update_descr_addr(XlnxZDMA *s, bool type, - unsigned int basereg) -{ - uint64_t addr, next; - if (type == DTYPE_LINEAR) { - next = zdma_get_regaddr64(s, basereg); - next += sizeof(s->dsc_dst); - zdma_put_regaddr64(s, basereg, next); - } else { - addr = zdma_get_regaddr64(s, basereg); - addr += sizeof(s->dsc_dst); - address_space_read(s->dma_as, addr, s->attr, &next, 8); - zdma_put_regaddr64(s, basereg, next); - } - return next; + /* Advance the descriptor pointer. */ + dst_type = FIELD_EX32(s->dsc_dst.words[3], ZDMA_CH_DST_DSCR_WORD3, TYPE); + zdma_update_descr_addr(s, dst_type, R_ZDMA_CH_DST_CUR_DSCR_LSB); } static void zdma_write_dst(XlnxZDMA *s, uint8_t *buf, uint32_t len) @@ -387,14 +391,7 @@ static void zdma_write_dst(XlnxZDMA *s, uint8_t *buf, uint32_t len) dst_size = FIELD_EX32(s->dsc_dst.words[2], ZDMA_CH_DST_DSCR_WORD2, SIZE); if (dst_size == 0 && ptype == PT_MEM) { - uint64_t next; - bool dst_type = FIELD_EX32(s->dsc_dst.words[3], - ZDMA_CH_DST_DSCR_WORD3, - TYPE); - - next = zdma_update_descr_addr(s, dst_type, - R_ZDMA_CH_DST_CUR_DSCR_LSB); - zdma_load_descriptor(s, next, &s->dsc_dst); + zdma_load_dst_descriptor(s); dst_size = FIELD_EX32(s->dsc_dst.words[2], ZDMA_CH_DST_DSCR_WORD2, SIZE); } |