[gem5-dev] Change in gem5/gem5[master]: Pl011: Added registers UART_RSR/UART_ECR

[MadMaurice (Gerrit)]

MadMaurice has uploaded this change for review. (  
https://gem5-review.googlesource.com/c/public/gem5/+/12686

Change subject: Pl011: Added registers UART_RSR/UART_ECR
......................................................................

Pl011: Added registers UART_RSR/UART_ECR

UART_RSR shows errors with the transmission and UART_ECR can clear
those (according to PL011 Technical Reference Manual Revision r1p4).  As  
these
transmission errors never occur, they are implemented as RAZ/WI.

Change-Id: Ia9d13c90c65feccf3ecec36a782170755b1e1c02
---
M src/dev/arm/pl011.cc
M src/dev/arm/pl011.hh
2 files changed, 7 insertions(+), 0 deletions(-)



diff --git a/src/dev/arm/pl011.cc b/src/dev/arm/pl011.cc
index e47cc67..5ca9f60 100644
--- a/src/dev/arm/pl011.cc
+++ b/src/dev/arm/pl011.cc
@@ -92,6 +92,9 @@
             }
         }
         break;
+      case UART_RSR:
+        data = 0x0; // We never have errors
+        break;
       case UART_FR:
         data =
             UART_FR_CTS | // Clear To Send
@@ -205,6 +208,8 @@
         clearInterrupts(UART_TXINTR);
         raiseInterrupts(UART_TXINTR);
         break;
+      case UART_ECR: // clears errors, ignore
+        break;
       case UART_CR:
         control = data;
         break;
diff --git a/src/dev/arm/pl011.hh b/src/dev/arm/pl011.hh
index 2317b31..5a92d88 100644
--- a/src/dev/arm/pl011.hh
+++ b/src/dev/arm/pl011.hh
@@ -118,6 +118,8 @@
   protected: // Registers
     static const uint64_t AMBA_ID = ULL(0xb105f00d00341011);
     static const int UART_DR = 0x000;
+    static const int UART_RSR = 0x004;
+    static const int UART_ECR = 0x004;
     static const int UART_FR = 0x018;
     static const int UART_FR_CTS  = 0x001;
     static const int UART_FR_RXFE = 0x010;

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Gerrit-Project: public/gem5
Gerrit-Branch: master
Gerrit-Change-Id: Ia9d13c90c65feccf3ecec36a782170755b1e1c02
Gerrit-Change-Number: 12686
Gerrit-PatchSet: 1
Gerrit-Owner: MadMaurice <madnaur...@googlemail.com>
Gerrit-MessageType: newchange
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