Whole mess'o'changes.. see individual files

arch/alpha/vtophys.cc:
    Removed buggy code that tries to fix PAL addresses (may cause problems
    while trying to debug in PAL code, but that should do this fix outside
    of vtophys)
base/loader/symtab.cc:
base/loader/symtab.hh:
cpu/exetrace.cc:
    Changed InstExec traces to always print a symbol name
dev/ide_ctrl.cc:
dev/ide_disk.cc:
    Tabs
dev/ide_disk.hh:
    Change buffer size
dev/tsunami_pchip.cc:
    Fix translatePciToDma to support scatter gather mapping
kern/linux/linux_system.cc:
    Force simulator to wait until remote debugger attaches (should be removed
    or turned on/off with a flag)

--HG--
extra : convert_revision : 1d08aebe3f448c87a963dd613de3e2e0cff0d48d

dev/ide_disk.cc

@@ -55,8 +55,9 @@ using namespace std;
 
 IdeDisk::IdeDisk(const string &name, DiskImage *img, PhysicalMemory *phys,
                  int id, int delay)
-    : SimObject(name), ctrl(NULL), image(img), physmem(phys), dmaTransferEvent(this),
-      dmaReadWaitEvent(this), dmaWriteWaitEvent(this), dmaPrdReadEvent(this),
+    : SimObject(name), ctrl(NULL), image(img), physmem(phys),
+      dmaTransferEvent(this), dmaReadWaitEvent(this),
+      dmaWriteWaitEvent(this), dmaPrdReadEvent(this),
       dmaReadEvent(this), dmaWriteEvent(this)
 {
     diskDelay = (delay * ticksPerSecond / 1000) / image->size();
@@ -379,8 +380,9 @@ IdeDisk::dmaWriteDone()
     }
 
     // copy the data to memory
-    Addr dmaAddr =
-        ctrl->tsunami->pchip->translatePciToDma(curPrd.getBaseAddr());
+    Addr dmaAddr = ctrl->tsunami->pchip->
+        translatePciToDma(curPrd.getBaseAddr());
+
     memcpy(physmem->dma_addr(dmaAddr, curPrd.getByteCount()),
            (void *)dataBuffer, curPrd.getByteCount());
 
@@ -665,7 +667,9 @@ IdeDisk::updateState(DevAction_t action)
             cmdReg.status |= STATUS_DRQ_BIT;
 
             // put the first two bytes into the data register
-            memcpy((void *)&cmdReg.data0, (void *)dataBuffer, sizeof(uint16_t));
+            memcpy((void *)&cmdReg.data0, (void *)dataBuffer,
+                   sizeof(uint16_t));
+
             // copy the data into the data buffer
             if (curCommand == WIN_IDENTIFY)
                 memcpy((void *)dataBuffer, (void *)&driveID,
@@ -753,7 +757,9 @@ IdeDisk::updateState(DevAction_t action)
         break;
 
       case Transfer_Data_Out:
-        if (action == ACT_DATA_WRITE_BYTE || action == ACT_DATA_WRITE_SHORT) {
+        if (action == ACT_DATA_WRITE_BYTE ||
+            action == ACT_DATA_WRITE_SHORT) {
+
             if (action == ACT_DATA_READ_BYTE) {
                 panic("DEBUG: WRITING DATA ONE BYTE AT A TIME!\n");
             } else {
@@ -863,7 +869,8 @@ END_INIT_SIM_OBJECT_PARAMS(IdeDisk)
 
 CREATE_SIM_OBJECT(IdeDisk)
 {
-    return new IdeDisk(getInstanceName(), image, physmem, driveID, disk_delay);
+    return new IdeDisk(getInstanceName(), image, physmem, driveID,
+                       disk_delay);
 }
 
 REGISTER_SIM_OBJECT("IdeDisk", IdeDisk)

dev/ide_disk.hh

@@ -40,8 +40,8 @@
 
 #define DMA_BACKOFF_PERIOD 200
 
-#define MAX_DMA_SIZE (16384)
-#define MAX_MULTSECT (32)
+#define MAX_DMA_SIZE (131072) // 256 * SectorSize (512)
+#define MAX_MULTSECT (128)
 
 #define PRD_BASE_MASK  0xfffffffe
 #define PRD_COUNT_MASK 0xfffe

dev/tsunami_pchip.cc

@@ -18,6 +18,7 @@
 #include "dev/tsunamireg.h"
 #include "dev/tsunami.hh"
 #include "mem/functional_mem/memory_control.hh"
+#include "mem/functional_mem/physical_memory.hh"
 #include "sim/builder.hh"
 #include "sim/system.hh"
 
@@ -217,12 +218,21 @@ TsunamiPChip::write(MemReqPtr &req, const uint8_t *data)
     return No_Fault;
 }
 
+#define DMA_ADDR_MASK ULL(0x3ffffffff)
+
 Addr
 TsunamiPChip::translatePciToDma(Addr busAddr)
 {
     // compare the address to the window base registers
+    uint64_t tbaMask = 0;
+    uint64_t baMask = 0;
+
     uint64_t windowMask = 0;
     uint64_t windowBase = 0;
+
+    uint64_t pteEntry = 0;
+
+    Addr pteAddr;
     Addr dmaAddr;
 
     for (int i = 0; i < 4; i++) {
@@ -230,15 +240,38 @@ TsunamiPChip::translatePciToDma(Addr busAddr)
         windowMask = ~wsm[i] & (0x7ff << 20);
 
         if ((busAddr & windowMask) == (windowBase & windowMask)) {
-            windowMask = (wsm[i] & (0x7ff << 20)) | 0xfffff;
+
 
             if (wsba[i] & 0x1) {   // see if enabled
-                if (wsba[i] & 0x2) // see if SG bit is set
-                    panic("PCI to system SG mapping not currently implemented!\n");
-                else
-                    dmaAddr = (tba[i] & ~windowMask) | (busAddr & windowMask);
+                if (wsba[i] & 0x2) { // see if SG bit is set
+                    /** @todo
+                        This currently is faked by just doing a direct
+                        read from memory, however, to be realistic, this
+                        needs to actually do a bus transaction.  The process
+                        is explained in the tsunami documentation on page
+                        10-12 and basically munges the address to look up a
+                        PTE from a table in memory and then uses that mapping
+                        to create an address for the SG page
+                    */
 
-                return dmaAddr;
+                    tbaMask = ~(((wsm[i] & (0x7ff << 20)) >> 10) | 0x3ff);
+                    baMask = (wsm[i] & (0x7ff << 20)) | (0x7f << 13);
+                    pteAddr = (tba[i] & tbaMask) | ((busAddr & baMask) >> 10);
+
+                    memcpy((void *)&pteEntry,
+                           tsunami->system->
+                           physmem->dma_addr(pteAddr, sizeof(uint64_t)),
+                           sizeof(uint64_t));
+
+                    dmaAddr = ((pteEntry & ~0x1) << 12) | (busAddr & 0xfff);
+
+                } else {
+                    baMask = (wsm[i] & (0x7ff << 20)) | 0xfffff;
+                    tbaMask = ~baMask;
+                    dmaAddr = (tba[i] & tbaMask) | (busAddr & baMask);
+                }
+
+                return (dmaAddr & DMA_ADDR_MASK);
             }
         }
     }