From fd21387149c272b8aaee62466fe96863f3ef458f Mon Sep 17 00:00:00 2001
From: Ali Saidi <saidi@eecs.umich.edu>
Date: Fri, 14 May 2004 17:34:15 -0400
Subject: Linux boots... various fixes to make console work correctly

dev/console.cc:
    commented out code that checks if an interrupt is happening before issuing one
    because they can get lost when linux boots
dev/console.hh:
    added a setPlatform function to set the platform to interrupt
dev/platform.hh:
dev/tsunami.cc:
dev/tsunami.hh:
    Added virtual functions to post console interrupts
dev/tsunami_io.cc:
    allowed a 64bit read of the PIC since we can't do a physical byte read
dev/tsunami_uart.cc:
    moved TsunamiUart to PioDevice
    various little fixes to make linux work
dev/tsunami_uart.hh:
    Made Tsunami_Uart a PIO device
dev/tsunamireg.h:
    added some UART defines and used the ULL macros
kern/linux/linux_system.cc:
    commented out waiting for gdb

--HG--
extra : convert_revision : 8cfd0700f3812ab349a6d7f132f85f4f421c5c5e
---
 dev/tsunami_io.cc | 47 +++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 41 insertions(+), 6 deletions(-)

(limited to 'dev/tsunami_io.cc')

diff --git a/dev/tsunami_io.cc b/dev/tsunami_io.cc
index d32291d0d..2dda86fbc 100644
--- a/dev/tsunami_io.cc
+++ b/dev/tsunami_io.cc
@@ -151,12 +151,21 @@ TsunamiIO::read(MemReqPtr &req, uint8_t *data)
             req->vaddr, req->size, req->vaddr & 0xfff);
 
     Addr daddr = (req->paddr - (addr & PA_IMPL_MASK));
-//    ExecContext *xc = req->xc;
-//    int cpuid = xc->cpu_id;
+
 
     switch(req->size) {
       case sizeof(uint8_t):
         switch(daddr) {
+          case TSDEV_PIC1_ISR:
+              // !!! If this is modified 64bit case needs to be too
+              // Pal code has to do a 64 bit physical read because there is
+              // no load physical byte instruction
+              *(uint8_t*)data = picr;
+              return No_Fault;
+          case TSDEV_PIC2_ISR:
+              // PIC2 not implemnted... just return 0
+              *(uint8_t*)data = 0x00;
+              return No_Fault;
           case TSDEV_TMR_CTL:
             *(uint8_t*)data = timer2.Status();
             return No_Fault;
@@ -206,7 +215,22 @@ TsunamiIO::read(MemReqPtr &req, uint8_t *data)
         }
       case sizeof(uint16_t):
       case sizeof(uint32_t):
+        panic("I/O Read - invalid size - va %#x size %d\n",
+              req->vaddr, req->size);
+
       case sizeof(uint64_t):
+       switch(daddr) {
+          case TSDEV_PIC1_ISR:
+              // !!! If this is modified 8bit case needs to be too
+              // Pal code has to do a 64 bit physical read because there is
+              // no load physical byte instruction
+              *(uint64_t*)data = (uint64_t)picr;
+              return No_Fault;
+          default:
+              panic("I/O Read - invalid size - va %#x size %d\n",
+                    req->vaddr, req->size);
+       }
+
       default:
         panic("I/O Read - invalid size - va %#x size %d\n",
               req->vaddr, req->size);
@@ -231,17 +255,30 @@ TsunamiIO::write(MemReqPtr &req, const uint8_t *data)
       case sizeof(uint8_t):
         switch(daddr) {
           case TSDEV_PIC1_MASK:
-            mask1 = *(uint8_t*)data;
+            mask1 = ~(*(uint8_t*)data);
             if ((picr & mask1) && !picInterrupting) {
                 picInterrupting = true;
                 tsunami->cchip->postDRIR(55);
                 DPRINTF(Tsunami, "posting pic interrupt to cchip\n");
             }
+            if ((!(picr & mask1)) && picInterrupting) {
+                picInterrupting = false;
+                tsunami->cchip->clearDRIR(55);
+                DPRINTF(Tsunami, "clearing pic interrupt\n");
+            }
             return No_Fault;
           case TSDEV_PIC2_MASK:
             mask2 = *(uint8_t*)data;
             //PIC2 Not implemented to interrupt
             return No_Fault;
+          case TSDEV_PIC1_ACK:
+            // clear the interrupt on the PIC
+            picr &= ~(1 << (*(uint8_t*)data & 0xF));
+            if (!(picr & mask1))
+                tsunami->cchip->clearDRIR(55);
+            return No_Fault;
+          case TSDEV_PIC2_ACK:
+            return No_Fault;
           case TSDEV_DMA1_RESET:
             return No_Fault;
           case TSDEV_DMA2_RESET:
@@ -321,8 +358,7 @@ TsunamiIO::postPIC(uint8_t bitvector)
 {
     //PIC2 Is not implemented, because nothing of interest there
     picr |= bitvector;
-    if ((picr & mask1) && !picInterrupting) {
-        picInterrupting = true;
+    if (picr & mask1) {
         tsunami->cchip->postDRIR(55);
         DPRINTF(Tsunami, "posting pic interrupt to cchip\n");
     }
@@ -334,7 +370,6 @@ TsunamiIO::clearPIC(uint8_t bitvector)
     //PIC2 Is not implemented, because nothing of interest there
     picr &= ~bitvector;
     if (!(picr & mask1)) {
-        picInterrupting = false;
         tsunami->cchip->clearDRIR(55);
         DPRINTF(Tsunami, "clearing pic interrupt to cchip\n");
     }
-- 
cgit v1.2.3