[PATCH v4 06/15] hw/dma/zynq-devcfg: Simulate dummy PL reset

["Corvin Köhne" <corvin.koehne@gmail.com>]

From: YannickV <Y.Vossen@beckhoff.com>

Setting PCFG_PROG_B should reset the PL. After a reset PCFG_INIT
should indicate that the reset is finished successfully.

In order to add a MMIO-Device as part of the PL in the Zynq, the
reset logic must succeed. The PCFG_INIT flag is now set when the
PL reset is triggered by PCFG_PROG_B. Indicating the reset was
successful.

Signed-off-by: YannickV <Y.Vossen@beckhoff.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
---
 hw/dma/xlnx-zynq-devcfg.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/hw/dma/xlnx-zynq-devcfg.c b/hw/dma/xlnx-zynq-devcfg.c
index 28b3cd2902..53bcf49140 100644
--- a/hw/dma/xlnx-zynq-devcfg.c
+++ b/hw/dma/xlnx-zynq-devcfg.c
@@ -49,6 +49,7 @@
 
 REG32(CTRL, 0x00)
     FIELD(CTRL,     FORCE_RST,          31,  1) /* Not supported, wr ignored */
+    FIELD(CTRL,     PCFG_PROG_B,        30,  1)
     FIELD(CTRL,     PCAP_PR,            27,  1) /* Forced to 0 on bad unlock */
     FIELD(CTRL,     PCAP_MODE,          26,  1)
     FIELD(CTRL,     MULTIBOOT_EN,       24,  1)
@@ -116,6 +117,7 @@ REG32(STATUS, 0x14)
     FIELD(STATUS,   PSS_GTS_USR_B,      11,  1)
     FIELD(STATUS,   PSS_FST_CFG_B,      10,  1)
     FIELD(STATUS,   PSS_CFG_RESET_B,     5,  1)
+    FIELD(STATUS,   PCFG_INIT,           4,  1)
 
 REG32(DMA_SRC_ADDR, 0x18)
 REG32(DMA_DST_ADDR, 0x1C)
@@ -204,6 +206,13 @@ static uint64_t r_ctrl_pre_write(RegisterInfo *reg, uint64_t val)
             val |= lock_ctrl_map[i] & s->regs[R_CTRL];
         }
     }
+
+    if (FIELD_EX32(val, CTRL, PCFG_PROG_B)) {
+        s->regs[R_STATUS] |= R_STATUS_PCFG_INIT_MASK;
+    } else {
+        s->regs[R_STATUS] &= ~R_STATUS_PCFG_INIT_MASK;
+    }
+
     return val;
 }
 
-- 
2.47.3