From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>

Populate DBG0.CMN_BUF_FREE so that SW can see some free space.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
 hw/dma/xlnx-zdma.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/dma/xlnx-zdma.c b/hw/dma/xlnx-zdma.c
index a6c5b2304a..6a4699757a 100644
--- a/hw/dma/xlnx-zdma.c
+++ b/hw/dma/xlnx-zdma.c
@@ -680,6 +680,12 @@ static RegisterAccessInfo zdma_regs_info[] = {
     },{ .name = "ZDMA_CH_DBG0",  .addr = A_ZDMA_CH_DBG0,
         .rsvd = 0xfffffe00,
         .ro = 0x1ff,
+
+        /*
+         * There's SW out there that will check the debug regs for free space.
+         * Claim that we always have 0x100 free.
+         */
+        .reset = 0x100
     },{ .name = "ZDMA_CH_DBG1",  .addr = A_ZDMA_CH_DBG1,
         .rsvd = 0xfffffe00,
         .ro = 0x1ff,
-- 
2.20.1

On Thu, Apr 2, 2020 at 6:46 AM Edgar E. Iglesias
<edgar.iglesias@gmail.com> wrote:
>
> From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
>
> Populate DBG0.CMN_BUF_FREE so that SW can see some free space.
>
> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  hw/dma/xlnx-zdma.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/hw/dma/xlnx-zdma.c b/hw/dma/xlnx-zdma.c
> index a6c5b2304a..6a4699757a 100644
> --- a/hw/dma/xlnx-zdma.c
> +++ b/hw/dma/xlnx-zdma.c
> @@ -680,6 +680,12 @@ static RegisterAccessInfo zdma_regs_info[] = {
>      },{ .name = "ZDMA_CH_DBG0",  .addr = A_ZDMA_CH_DBG0,
>          .rsvd = 0xfffffe00,
>          .ro = 0x1ff,
> +
> +        /*
> +         * There's SW out there that will check the debug regs for free space.
> +         * Claim that we always have 0x100 free.
> +         */
> +        .reset = 0x100
>      },{ .name = "ZDMA_CH_DBG1",  .addr = A_ZDMA_CH_DBG1,
>          .rsvd = 0xfffffe00,
>          .ro = 0x1ff,
> --
> 2.20.1
>
>

On [2020 Apr 02] Thu 15:47:18, Edgar E. Iglesias wrote:
> From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
> 
> Populate DBG0.CMN_BUF_FREE so that SW can see some free space.
> 
> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>

Reviewed-by: Francisco Iglesias <frasse.iglesias@gmail.com>

> ---
>  hw/dma/xlnx-zdma.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/hw/dma/xlnx-zdma.c b/hw/dma/xlnx-zdma.c
> index a6c5b2304a..6a4699757a 100644
> --- a/hw/dma/xlnx-zdma.c
> +++ b/hw/dma/xlnx-zdma.c
> @@ -680,6 +680,12 @@ static RegisterAccessInfo zdma_regs_info[] = {
>      },{ .name = "ZDMA_CH_DBG0",  .addr = A_ZDMA_CH_DBG0,
>          .rsvd = 0xfffffe00,
>          .ro = 0x1ff,
> +
> +        /*
> +         * There's SW out there that will check the debug regs for free space.
> +         * Claim that we always have 0x100 free.
> +         */
> +        .reset = 0x100
>      },{ .name = "ZDMA_CH_DBG1",  .addr = A_ZDMA_CH_DBG1,
>          .rsvd = 0xfffffe00,
>          .ro = 0x1ff,
> -- 
> 2.20.1
>