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-rw-r--r--src/dev/isa_fake.cc137
-rw-r--r--src/dev/isa_fake.hh32
2 files changed, 60 insertions, 109 deletions
diff --git a/src/dev/isa_fake.cc b/src/dev/isa_fake.cc
index ccc9a1f7c..103fdd8ce 100644
--- a/src/dev/isa_fake.cc
+++ b/src/dev/isa_fake.cc
@@ -25,18 +25,13 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
- * Authors: Miguel Serrano
- * Ali Saidi
+ * Authors: Ali Saidi
*/
/** @file
* Isa Fake Device implementation
*/
-#include <deque>
-#include <string>
-#include <vector>
-
#include "base/trace.hh"
#include "dev/isa_fake.hh"
#include "mem/packet.hh"
@@ -49,74 +44,67 @@ using namespace std;
IsaFake::IsaFake(Params *p)
: BasicPioDevice(p)
{
- pioSize = p->pio_size;
-}
-
-Tick
-IsaFake::read(PacketPtr pkt)
-{
- assert(pkt->result == Packet::Unknown);
- assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
-
- DPRINTF(Tsunami, "read va=%#x size=%d\n", pkt->getAddr(), pkt->getSize());
-
- switch (pkt->getSize()) {
- case sizeof(uint64_t):
- pkt->set(0xFFFFFFFFFFFFFFFFULL);
- break;
- case sizeof(uint32_t):
- pkt->set((uint32_t)0xFFFFFFFF);
- break;
- case sizeof(uint16_t):
- pkt->set((uint16_t)0xFFFF);
- break;
- case sizeof(uint8_t):
- pkt->set((uint8_t)0xFF);
- break;
- default:
- panic("invalid access size(?) for PCI configspace!\n");
- }
- pkt->result = Packet::Success;
- return pioDelay;
-}
-
-Tick
-IsaFake::write(PacketPtr pkt)
-{
- DPRINTF(Tsunami, "write - va=%#x size=%d \n", pkt->getAddr(), pkt->getSize());
- pkt->result = Packet::Success;
- return pioDelay;
-}
+ if (!params()->retBadAddr)
+ pioSize = p->pio_size;
-BadAddr::BadAddr(Params *p)
- : BasicPioDevice(p)
-{
+ memset(&retData, p->retData, sizeof(retData));
}
void
-BadAddr::init()
+IsaFake::init()
{
// Only init this device if it's connected to anything.
if (pioPort)
PioDevice::init();
}
+
Tick
-BadAddr::read(PacketPtr pkt)
+IsaFake::read(PacketPtr pkt)
{
assert(pkt->result == Packet::Unknown);
- DPRINTF(Tsunami, "read to bad address va=%#x size=%d\n",
- pkt->getAddr(), pkt->getSize());
- pkt->result = Packet::BadAddress;
+
+ if (params()->retBadAddr) {
+ DPRINTF(Tsunami, "read to bad address va=%#x size=%d\n",
+ pkt->getAddr(), pkt->getSize());
+ pkt->result = Packet::BadAddress;
+ } else {
+ assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
+ DPRINTF(Tsunami, "read va=%#x size=%d\n",
+ pkt->getAddr(), pkt->getSize());
+ switch (pkt->getSize()) {
+ case sizeof(uint64_t):
+ pkt->set(retData);
+ break;
+ case sizeof(uint32_t):
+ pkt->set((uint32_t)retData);
+ break;
+ case sizeof(uint16_t):
+ pkt->set((uint16_t)retData);
+ break;
+ case sizeof(uint8_t):
+ pkt->set((uint8_t)retData);
+ break;
+ default:
+ panic("invalid access size!\n");
+ }
+ pkt->result = Packet::Success;
+ }
return pioDelay;
}
Tick
-BadAddr::write(PacketPtr pkt)
+IsaFake::write(PacketPtr pkt)
{
- DPRINTF(Tsunami, "write to bad address va=%#x size=%d \n",
- pkt->getAddr(), pkt->getSize());
- pkt->result = Packet::BadAddress;
+ if (params()->retBadAddr) {
+ DPRINTF(Tsunami, "write to bad address va=%#x size=%d \n",
+ pkt->getAddr(), pkt->getSize());
+ pkt->result = Packet::BadAddress;
+ } else {
+ DPRINTF(Tsunami, "write - va=%#x size=%d \n",
+ pkt->getAddr(), pkt->getSize());
+ pkt->result = Packet::Success;
+ }
return pioDelay;
}
@@ -125,6 +113,8 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(IsaFake)
Param<Addr> pio_addr;
Param<Tick> pio_latency;
Param<Addr> pio_size;
+ Param<bool> ret_bad_addr;
+ Param<uint8_t> ret_data;
SimObjectParam<Platform *> platform;
SimObjectParam<System *> system;
@@ -135,6 +125,8 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(IsaFake)
INIT_PARAM(pio_addr, "Device Address"),
INIT_PARAM(pio_latency, "Programmed IO latency"),
INIT_PARAM(pio_size, "Size of address range"),
+ INIT_PARAM(ret_bad_addr, "Return pkt status BadAddr"),
+ INIT_PARAM(ret_data, "Data to return if not bad addr"),
INIT_PARAM(platform, "platform"),
INIT_PARAM(system, "system object")
@@ -147,40 +139,11 @@ CREATE_SIM_OBJECT(IsaFake)
p->pio_addr = pio_addr;
p->pio_delay = pio_latency;
p->pio_size = pio_size;
+ p->retBadAddr = ret_bad_addr;
+ p->retData = ret_data;
p->platform = platform;
p->system = system;
return new IsaFake(p);
}
REGISTER_SIM_OBJECT("IsaFake", IsaFake)
-
-BEGIN_DECLARE_SIM_OBJECT_PARAMS(BadAddr)
-
- Param<Addr> pio_addr;
- Param<Tick> pio_latency;
- SimObjectParam<Platform *> platform;
- SimObjectParam<System *> system;
-
-END_DECLARE_SIM_OBJECT_PARAMS(BadAddr)
-
-BEGIN_INIT_SIM_OBJECT_PARAMS(BadAddr)
-
- INIT_PARAM(pio_addr, "Device Address"),
- INIT_PARAM(pio_latency, "Programmed IO latency"),
- INIT_PARAM(platform, "platform"),
- INIT_PARAM(system, "system object")
-
-END_INIT_SIM_OBJECT_PARAMS(BadAddr)
-
-CREATE_SIM_OBJECT(BadAddr)
-{
- BadAddr::Params *p = new BadAddr::Params;
- p->name = getInstanceName();
- p->pio_addr = pio_addr;
- p->pio_delay = pio_latency;
- p->platform = platform;
- p->system = system;
- return new BadAddr(p);
-}
-
-REGISTER_SIM_OBJECT("BadAddr", BadAddr)
diff --git a/src/dev/isa_fake.hh b/src/dev/isa_fake.hh
index c781d1ba6..4c195a97f 100644
--- a/src/dev/isa_fake.hh
+++ b/src/dev/isa_fake.hh
@@ -25,8 +25,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
- * Authors: Miguel Serrano
- * Ali Saidi
+ * Authors: Ali Saidi
*/
/** @file
@@ -42,10 +41,11 @@
#include "mem/packet.hh"
/**
- * IsaFake is a device that returns -1 on all reads and
- * accepts all writes. It is meant to be placed at an address range
+ * IsaFake is a device that returns, BadAddr, 1 or 0 on all reads and
+ * rites. It is meant to be placed at an address range
* so that an mcheck doesn't occur when an os probes a piece of hw
- * that doesn't exist (e.g. UARTs1-3).
+ * that doesn't exist (e.g. UARTs1-3), or catch requests in the memory system
+ * that have no responders..
*/
class IsaFake : public BasicPioDevice
{
@@ -53,9 +53,12 @@ class IsaFake : public BasicPioDevice
struct Params : public BasicPioDevice::Params
{
Addr pio_size;
+ bool retBadAddr;
+ uint8_t retData;
};
protected:
const Params *params() const { return (const Params*)_params; }
+ uint64_t retData;
public:
/**
@@ -77,23 +80,8 @@ class IsaFake : public BasicPioDevice
* @param data the data to not write.
*/
virtual Tick write(PacketPtr pkt);
-};
-/**
- * BadAddr is a device that fills the packet's result field with "BadAddress".
- * @todo: Consider consolidating with IsaFake and similar classes.
- */
-class BadAddr : public BasicPioDevice
-{
- public:
- struct Params : public BasicPioDevice::Params
- {
- };
-
- BadAddr(Params *p);
- virtual void init();
- virtual Tick read(PacketPtr pkt);
- virtual Tick write(PacketPtr pkt);
+ void init();
};
-#endif // __TSUNAMI_FAKE_HH__
+#endif // __ISA_FAKE_HH__
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 05:09:26 +0000