[Pdbg] [PATCH v4 14/19] libpdbg: Implement all thread procedures using sbefifo

[Alistair Popple]

Reviewed-by: Alistair Popple <alistair at popple.id.au>

On Tuesday, 21 April 2020 2:16:50 PM AEST Amitay Isaacs wrote:
> Signed-off-by: Amitay Isaacs <amitay at ozlabs.org>
> ---
>  libpdbg/sbefifo.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 51 insertions(+)
> 
> diff --git a/libpdbg/sbefifo.c b/libpdbg/sbefifo.c
> index eeb8d5c..935a891 100644
> --- a/libpdbg/sbefifo.c
> +++ b/libpdbg/sbefifo.c
> @@ -271,6 +271,53 @@ static int sbefifo_pib_write(struct pib *pib, uint64_t
> addr, uint64_t val) return sbefifo_scom_put(sctx, addr, val);
>  }
> 
> +static int sbefifo_pib_thread_op(struct pib *pib, uint32_t oper)
> +{
> +	struct sbefifo *sbefifo = target_to_sbefifo(pib->target.parent);
> +	struct sbefifo_context *sctx = sbefifo->get_sbefifo_context(sbefifo);
> +	uint32_t core_id, thread_id;
> +	uint8_t mode = 0;
> +
> +	/*
> +	 * core_id = 0xff (all SMT4 cores)
> +	 * thread_id = 0xf (all 4 threads in the SMT4 core)
> +	 */
> +	core_id = 0xff;
> +	thread_id = 0xf;
> +
> +	/* Enforce special-wakeup for thread stop and sreset */
> +	if ((oper & 0xf) == SBEFIFO_INSN_OP_STOP ||
> +	    (oper & 0xf) == SBEFIFO_INSN_OP_SRESET)
> +		mode = 0x2;
> +
> +	return sbefifo_control_insn(sctx, core_id, thread_id, oper, mode);
> +}
> +
> +static int sbefifo_pib_thread_start(struct pib *pib)
> +{
> +	return sbefifo_pib_thread_op(pib, SBEFIFO_INSN_OP_START);
> +}
> +
> +static int sbefifo_pib_thread_stop(struct pib *pib)
> +{
> +	return sbefifo_pib_thread_op(pib, SBEFIFO_INSN_OP_STOP);
> +}
> +
> +static int sbefifo_pib_thread_step(struct pib *pib, int count)
> +{
> +	int i, rc = 0;
> +
> +	for (i = 0; i < count; i++)
> +		rc |= sbefifo_pib_thread_op(pib, SBEFIFO_INSN_OP_STEP);
> +
> +	return rc;
> +}
> +
> +static int sbefifo_pib_thread_sreset(struct pib *pib)
> +{
> +	return sbefifo_pib_thread_op(pib, SBEFIFO_INSN_OP_SRESET);
> +}
> +
>  static int sbefifo_thread_probe(struct pdbg_target *target)
>  {
>  	struct thread *thread = target_to_thread(target);
> @@ -409,6 +456,10 @@ static struct pib sbefifo_pib = {
>  	},
>  	.read = sbefifo_pib_read,
>  	.write = sbefifo_pib_write,
> +	.thread_start_all = sbefifo_pib_thread_start,
> +	.thread_stop_all = sbefifo_pib_thread_stop,
> +	.thread_step_all = sbefifo_pib_thread_step,
> +	.thread_sreset_all = sbefifo_pib_thread_sreset,
>  	.fd = -1,
>  };
>  DECLARE_HW_UNIT(sbefifo_pib);