summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--SConscript2
-rw-r--r--dev/ns_gige.cc2
-rw-r--r--dev/ns_gige.hh2
-rw-r--r--dev/ns_gige_reg.h2
-rw-r--r--dev/tsunami.cc3
-rw-r--r--dev/tsunami_cchip.cc2
-rw-r--r--dev/tsunami_io.cc2
-rw-r--r--dev/tsunami_pchip.cc2
-rw-r--r--dev/tsunamireg.h4
-rw-r--r--dev/uart.cc399
-rw-r--r--dev/uart.hh44
-rw-r--r--dev/uart8250.cc341
-rw-r--r--dev/uart8250.hh92
-rw-r--r--python/m5/objects/Uart.py8
14 files changed, 469 insertions, 436 deletions
diff --git a/SConscript b/SConscript
index b7ca89305..bb50f1872 100644
--- a/SConscript
+++ b/SConscript
@@ -280,6 +280,8 @@ full_system_sources = Split('''
dev/tsunami_io.cc
dev/tsunami_pchip.cc
dev/uart.cc
+ dev/uart8530.cc
+ dev/uart8250.cc
encumbered/dev/dma.cc
encumbered/dev/etherdev.cc
diff --git a/dev/ns_gige.cc b/dev/ns_gige.cc
index d911d86c4..0526c2779 100644
--- a/dev/ns_gige.cc
+++ b/dev/ns_gige.cc
@@ -26,7 +26,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* @file
+/** @file
* Device module for modelling the National Semiconductor
* DP83820 ethernet controller. Does not support priority queueing
*/
diff --git a/dev/ns_gige.hh b/dev/ns_gige.hh
index 302aa5a89..a1e90a375 100644
--- a/dev/ns_gige.hh
+++ b/dev/ns_gige.hh
@@ -26,7 +26,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* @file
+/** @file
* Device module for modelling the National Semiconductor
* DP83820 ethernet controller
*/
diff --git a/dev/ns_gige_reg.h b/dev/ns_gige_reg.h
index d73a6c6b2..be53149e7 100644
--- a/dev/ns_gige_reg.h
+++ b/dev/ns_gige_reg.h
@@ -26,7 +26,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* @file
+/** @file
* Ethernet device register definitions for the National
* Semiconductor DP83820 Ethernet controller
*/
diff --git a/dev/tsunami.cc b/dev/tsunami.cc
index d4398191b..2f8d9b804 100644
--- a/dev/tsunami.cc
+++ b/dev/tsunami.cc
@@ -26,6 +26,9 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+/** @file Implementation of Tsunami platform.
+ */
+
#include <deque>
#include <string>
#include <vector>
diff --git a/dev/tsunami_cchip.cc b/dev/tsunami_cchip.cc
index 139ea578f..2294a0bcf 100644
--- a/dev/tsunami_cchip.cc
+++ b/dev/tsunami_cchip.cc
@@ -26,7 +26,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* @file
+/** @file
* Emulation of the Tsunami CChip CSRs
*/
diff --git a/dev/tsunami_io.cc b/dev/tsunami_io.cc
index 2de064728..da1062237 100644
--- a/dev/tsunami_io.cc
+++ b/dev/tsunami_io.cc
@@ -26,7 +26,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* @file
+/** @file
* Tsunami I/O including PIC, PIT, RTC, DMA
*/
diff --git a/dev/tsunami_pchip.cc b/dev/tsunami_pchip.cc
index 4f3e2c529..40bec1f68 100644
--- a/dev/tsunami_pchip.cc
+++ b/dev/tsunami_pchip.cc
@@ -26,7 +26,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* @file
+/** @file
* Tsunami PChip (pci)
*/
diff --git a/dev/tsunamireg.h b/dev/tsunamireg.h
index 290f21a5b..df10ce29d 100644
--- a/dev/tsunamireg.h
+++ b/dev/tsunamireg.h
@@ -26,6 +26,10 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+/** @file
+ * List of Tsunami CSRs
+ */
+
#ifndef __TSUNAMIREG_H__
#define __TSUNAMIREG_H__
diff --git a/dev/uart.cc b/dev/uart.cc
index 9d453af72..3daf195d3 100644
--- a/dev/uart.cc
+++ b/dev/uart.cc
@@ -26,7 +26,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* @file
+/** @file
* Implements a 8250 UART
*/
@@ -47,60 +47,9 @@
using namespace std;
-Uart::IntrEvent::IntrEvent(Uart *u, int bit)
- : Event(&mainEventQueue), uart(u)
-{
- DPRINTF(Uart, "UART Interrupt Event Initilizing\n");
- intrBit = bit;
-}
-
-const char *
-Uart::IntrEvent::description()
-{
- return "uart interrupt delay event";
-}
-
-void
-Uart::IntrEvent::process()
-{
- if (intrBit & uart->IER) {
- DPRINTF(Uart, "UART InterEvent, interrupting\n");
- uart->platform->postConsoleInt();
- uart->status |= intrBit;
- }
- else
- DPRINTF(Uart, "UART InterEvent, not interrupting\n");
-
-}
-
-/* The linux serial driver (8250.c about line 1182) loops reading from
- * the device until the device reports it has no more data to
- * read. After a maximum of 255 iterations the code prints "serial8250
- * too much work for irq X," and breaks out of the loop. Since the
- * simulated system is so much slower than the actual system, if a
- * user is typing on the keyboard it is very easy for them to provide
- * input at a fast enough rate to not allow the loop to exit and thus
- * the error to be printed. This magic number provides a delay between
- * the time the UART receives a character to send to the simulated
- * system and the time it actually notifies the system it has a
- * character to send to alleviate this problem. --Ali
- */
-void
-Uart::IntrEvent::scheduleIntr()
-{
- static const Tick interval = (Tick)((Clock::Float::s / 2e9) * 450);
- DPRINTF(Uart, "Scheduling IER interrupt for %#x, at cycle %lld\n", intrBit,
- curTick + interval);
- if (!scheduled())
- schedule(curTick + interval);
- else
- reschedule(curTick + interval);
-}
-
Uart::Uart(const string &name, SimConsole *c, MemoryController *mmu, Addr a,
Addr s, HierParams *hier, Bus *bus, Tick pio_latency, Platform *p)
- : PioDevice(name, p), addr(a), size(s), cons(c),
- txIntrEvent(this, TX_INT), rxIntrEvent(this, RX_INT)
+ : PioDevice(name, p), addr(a), size(s), cons(c)
{
mmu->add_child(this, RangeSize(addr, size));
@@ -112,270 +61,11 @@ Uart::Uart(const string &name, SimConsole *c, MemoryController *mmu, Addr a,
pioLatency = pio_latency * bus->clockRate;
}
- readAddr = 0;
- IER = 0;
- DLAB = 0;
- LCR = 0;
- MCR = 0;
status = 0;
// set back pointers
cons->uart = this;
platform->uart = this;
-
-}
-
-Fault
-Uart::read(MemReqPtr &req, uint8_t *data)
-{
- Addr daddr = req->paddr - (addr & EV5::PAddrImplMask);
- DPRINTF(Uart, " read register %#x\n", daddr);
-
-
-
-#ifdef ALPHA_TLASER
-
- switch (req->size) {
- case sizeof(uint64_t):
- *(uint64_t *)data = 0;
- break;
- case sizeof(uint32_t):
- *(uint32_t *)data = 0;
- break;
- case sizeof(uint16_t):
- *(uint16_t *)data = 0;
- break;
- case sizeof(uint8_t):
- *(uint8_t *)data = 0;
- break;
- }
-
- switch (daddr) {
- case 0x80: // Status Register
- if (readAddr == 3) {
- readAddr = 0;
- if (status & TX_INT)
- *data = (1 << 4);
- else if (status & RX_INT)
- *data = (1 << 5);
- else
- DPRINTF(Uart, "spurious read\n");
-
- } else {
- *data = (1 << 2);
- if (status & RX_INT)
- *data |= (1 << 0);
- }
- break;
-
- case 0xc0: // Data register (RX)
- if (!cons->dataAvailable())
- panic("No data to read");
-
- cons->in(*data);
-
- if (!cons->dataAvailable()) {
- platform->clearConsoleInt();
- status &= ~RX_INT;
- }
-
- DPRINTF(Uart, "read data register \'%c\' %2x\n",
- isprint(*data) ? *data : ' ', *data);
- break;
- }
-
-
-#else
-
-
- assert(req->size == 1);
-
- switch (daddr) {
- case 0x0:
- if (!(LCR & 0x80)) { // read byte
- if (cons->dataAvailable())
- cons->in(*data);
- else {
- *(uint8_t*)data = 0;
- // A limited amount of these are ok.
- DPRINTF(Uart, "empty read of RX register\n");
- }
- status &= ~RX_INT;
- platform->clearConsoleInt();
-
- if (cons->dataAvailable() && (IER & UART_IER_RDI))
- rxIntrEvent.scheduleIntr();
- } else { // dll divisor latch
- ;
- }
- break;
- case 0x1:
- if (!(LCR & 0x80)) { // Intr Enable Register(IER)
- *(uint8_t*)data = IER;
- } else { // DLM divisor latch MSB
- ;
- }
- break;
- case 0x2: // Intr Identification Register (IIR)
- DPRINTF(Uart, "IIR Read, status = %#x\n", (uint32_t)status);
- if (status)
- *(uint8_t*)data = 0;
- else
- *(uint8_t*)data = 1;
- break;
- case 0x3: // Line Control Register (LCR)
- *(uint8_t*)data = LCR;
- break;
- case 0x4: // Modem Control Register (MCR)
- break;
- case 0x5: // Line Status Register (LSR)
- uint8_t lsr;
- lsr = 0;
- // check if there are any bytes to be read
- if (cons->dataAvailable())
- lsr = UART_LSR_DR;
- lsr |= UART_LSR_TEMT | UART_LSR_THRE;
- *(uint8_t*)data = lsr;
- break;
- case 0x6: // Modem Status Register (MSR)
- *(uint8_t*)data = 0;
- break;
- case 0x7: // Scratch Register (SCR)
- *(uint8_t*)data = 0; // doesn't exist with at 8250.
- break;
- default:
- panic("Tried to access a UART port that doesn't exist\n");
- break;
- }
-
-#endif
- return No_Fault;
-
-}
-
-Fault
-Uart::write(MemReqPtr &req, const uint8_t *data)
-{
- Addr daddr = req->paddr - (addr & EV5::PAddrImplMask);
-
- DPRINTF(Uart, " write register %#x value %#x\n", daddr, *(uint8_t*)data);
-
-#ifdef ALPHA_TLASER
-
- switch (daddr) {
- case 0x80:
- readAddr = *data;
- switch (*data) {
- case 0x28: // Ack of TX
- if ((status & TX_INT) == 0)
- panic("Ack of transmit, though there was no interrupt");
-
- status &= ~TX_INT;
- platform->clearConsoleInt();
- break;
- case 0x00:
- case 0x01:
- case 0x03: // going to read RR3
- case 0x12:
- break;
- default:
- DPRINTF(Uart, "writing status register %#x \n",
- *(uint64_t *)data);
- break;
- }
- break;
-
- case 0xc0: // Data register (TX)
- cons->out(*(uint64_t *)data);
- platform->postConsoleInt();
- status |= TX_INT;
- break;
- }
-
-
-#else
- switch (daddr) {
- case 0x0:
- if (!(LCR & 0x80)) { // write byte
- cons->out(*(uint8_t *)data);
- platform->clearConsoleInt();
- status &= ~TX_INT;
- if (UART_IER_THRI & IER)
- txIntrEvent.scheduleIntr();
- } else { // dll divisor latch
- ;
- }
- break;
- case 0x1:
- if (!(LCR & 0x80)) { // Intr Enable Register(IER)
- IER = *(uint8_t*)data;
- if (UART_IER_THRI & IER)
- {
- DPRINTF(Uart, "IER: IER_THRI set, scheduling TX intrrupt\n");
- txIntrEvent.scheduleIntr();
- }
- else
- {
- DPRINTF(Uart, "IER: IER_THRI cleared, descheduling TX intrrupt\n");
- if (txIntrEvent.scheduled())
- txIntrEvent.deschedule();
- if (status & TX_INT)
- platform->clearConsoleInt();
- status &= ~TX_INT;
- }
-
- if ((UART_IER_RDI & IER) && cons->dataAvailable()) {
- DPRINTF(Uart, "IER: IER_RDI set, scheduling RX intrrupt\n");
- rxIntrEvent.scheduleIntr();
- } else {
- DPRINTF(Uart, "IER: IER_RDI cleared, descheduling RX intrrupt\n");
- if (rxIntrEvent.scheduled())
- rxIntrEvent.deschedule();
- if (status & RX_INT)
- platform->clearConsoleInt();
- status &= ~RX_INT;
- }
- } else { // DLM divisor latch MSB
- ;
- }
- break;
- case 0x2: // FIFO Control Register (FCR)
- break;
- case 0x3: // Line Control Register (LCR)
- LCR = *(uint8_t*)data;
- break;
- case 0x4: // Modem Control Register (MCR)
- if (*(uint8_t*)data == (UART_MCR_LOOP | 0x0A))
- MCR = 0x9A;
- break;
- case 0x7: // Scratch Register (SCR)
- // We are emulating a 8250 so we don't have a scratch reg
- break;
- default:
- panic("Tried to access a UART port that doesn't exist\n");
- break;
- }
-#endif
-
- return No_Fault;
-}
-
-void
-Uart::dataAvailable()
-{
-#ifdef ALPHA_TLASER
- platform->postConsoleInt();
- status |= RX_INT;
-#else
-
- // if the kernel wants an interrupt when we have data
- if (IER & UART_IER_RDI)
- {
- platform->postConsoleInt();
- status |= RX_INT;
- }
-
-#endif
}
Tick
@@ -384,88 +74,5 @@ Uart::cacheAccess(MemReqPtr &req)
return curTick + pioLatency;
}
-void
-Uart::serialize(ostream &os)
-{
-#ifdef ALPHA_TLASER
- SERIALIZE_SCALAR(readAddr);
- SERIALIZE_SCALAR(status);
-#else
- SERIALIZE_SCALAR(status);
- SERIALIZE_SCALAR(IER);
- SERIALIZE_SCALAR(DLAB);
- SERIALIZE_SCALAR(LCR);
- SERIALIZE_SCALAR(MCR);
- Tick rxintrwhen;
- if (rxIntrEvent.scheduled())
- rxintrwhen = rxIntrEvent.when();
- else
- rxintrwhen = 0;
- Tick txintrwhen;
- if (txIntrEvent.scheduled())
- txintrwhen = txIntrEvent.when();
- else
- txintrwhen = 0;
- SERIALIZE_SCALAR(rxintrwhen);
- SERIALIZE_SCALAR(txintrwhen);
-#endif
-}
-
-void
-Uart::unserialize(Checkpoint *cp, const std::string &section)
-{
-#ifdef ALPHA_TLASER
- UNSERIALIZE_SCALAR(readAddr);
- UNSERIALIZE_SCALAR(status);
-#else
- UNSERIALIZE_SCALAR(status);
- UNSERIALIZE_SCALAR(IER);
- UNSERIALIZE_SCALAR(DLAB);
- UNSERIALIZE_SCALAR(LCR);
- UNSERIALIZE_SCALAR(MCR);
- Tick rxintrwhen;
- Tick txintrwhen;
- UNSERIALIZE_SCALAR(rxintrwhen);
- UNSERIALIZE_SCALAR(txintrwhen);
- if (rxintrwhen != 0)
- rxIntrEvent.schedule(rxintrwhen);
- if (txintrwhen != 0)
- txIntrEvent.schedule(txintrwhen);
-#endif
-
-}
-
-BEGIN_DECLARE_SIM_OBJECT_PARAMS(Uart)
-
- SimObjectParam<SimConsole *> console;
- SimObjectParam<MemoryController *> mmu;
- SimObjectParam<Platform *> platform;
- Param<Addr> addr;
- Param<Addr> size;
- SimObjectParam<Bus*> io_bus;
- Param<Tick> pio_latency;
- SimObjectParam<HierParams *> hier;
-
-
-END_DECLARE_SIM_OBJECT_PARAMS(Uart)
-
-BEGIN_INIT_SIM_OBJECT_PARAMS(Uart)
-
- INIT_PARAM(console, "The console"),
- INIT_PARAM(mmu, "Memory Controller"),
- INIT_PARAM(platform, "Pointer to platfrom"),
- INIT_PARAM(addr, "Device Address"),
- INIT_PARAM_DFLT(size, "Device size", 0x8),
- INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
- INIT_PARAM_DFLT(pio_latency, "Programmed IO latency in bus cycles", 1),
- INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams)
-
-END_INIT_SIM_OBJECT_PARAMS(Uart)
-
-CREATE_SIM_OBJECT(Uart)
-{
- return new Uart(getInstanceName(), console, mmu, addr, size, hier, io_bus,
- pio_latency, platform);
-}
+DEFINE_SIM_OBJECT_CLASS_NAME("Uart", Uart)
-REGISTER_SIM_OBJECT("Uart", Uart)
diff --git a/dev/uart.hh b/dev/uart.hh
index d1f167526..a2be3fb8e 100644
--- a/dev/uart.hh
+++ b/dev/uart.hh
@@ -26,14 +26,13 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* @file
- * Defines a 8250 UART
+/** @file
+ * Base class for UART
*/
-#ifndef __TSUNAMI_UART_HH__
-#define __TSUNAMI_UART_HH__
+#ifndef __UART_HH__
+#define __UART_HH__
-#include "dev/tsunamireg.h"
#include "base/range.hh"
#include "dev/io_device.hh"
@@ -47,45 +46,25 @@ const int TX_INT = 0x2;
class Uart : public PioDevice
{
- private:
+ protected:
+ int status;
Addr addr;
Addr size;
SimConsole *cons;
-
- protected:
- int readAddr; // tlaser only
- uint8_t IER, DLAB, LCR, MCR;
- int status;
-
- class IntrEvent : public Event
- {
- protected:
- Uart *uart;
- int intrBit;
- public:
- IntrEvent(Uart *u, int bit);
- virtual void process();
- virtual const char *description();
- void scheduleIntr();
- };
-
- IntrEvent txIntrEvent;
- IntrEvent rxIntrEvent;
-
public:
Uart(const std::string &name, SimConsole *c, MemoryController *mmu,
Addr a, Addr s, HierParams *hier, Bus *bus, Tick pio_latency,
Platform *p);
- Fault read(MemReqPtr &req, uint8_t *data);
- Fault write(MemReqPtr &req, const uint8_t *data);
+ virtual Fault read(MemReqPtr &req, uint8_t *data) = 0;
+ virtual Fault write(MemReqPtr &req, const uint8_t *data) = 0;
/**
* Inform the uart that there is data available.
*/
- void dataAvailable();
+ virtual void dataAvailable() = 0;
/**
@@ -94,9 +73,6 @@ class Uart : public PioDevice
*/
bool intStatus() { return status ? true : false; }
- virtual void serialize(std::ostream &os);
- virtual void unserialize(Checkpoint *cp, const std::string &section);
-
/**
* Return how long this access will take.
* @param req the memory request to calcuate
@@ -105,4 +81,4 @@ class Uart : public PioDevice
Tick cacheAccess(MemReqPtr &req);
};
-#endif // __TSUNAMI_UART_HH__
+#endif // __UART_HH__
diff --git a/dev/uart8250.cc b/dev/uart8250.cc
new file mode 100644
index 000000000..93e153319
--- /dev/null
+++ b/dev/uart8250.cc
@@ -0,0 +1,341 @@
+/*
+ * Copyright (c) 2004 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @file
+ * Implements a 8250 UART
+ */
+
+#include <string>
+#include <vector>
+
+#include "base/inifile.hh"
+#include "base/str.hh" // for to_number
+#include "base/trace.hh"
+#include "dev/simconsole.hh"
+#include "dev/uart8250.hh"
+#include "dev/platform.hh"
+#include "mem/bus/bus.hh"
+#include "mem/bus/pio_interface.hh"
+#include "mem/bus/pio_interface_impl.hh"
+#include "mem/functional_mem/memory_control.hh"
+#include "sim/builder.hh"
+
+using namespace std;
+
+Uart8250::IntrEvent::IntrEvent(Uart8250 *u, int bit)
+ : Event(&mainEventQueue), uart(u)
+{
+ DPRINTF(Uart, "UART Interrupt Event Initilizing\n");
+ intrBit = bit;
+}
+
+const char *
+Uart8250::IntrEvent::description()
+{
+ return "uart interrupt delay event";
+}
+
+void
+Uart8250::IntrEvent::process()
+{
+ if (intrBit & uart->IER) {
+ DPRINTF(Uart, "UART InterEvent, interrupting\n");
+ uart->platform->postConsoleInt();
+ uart->status |= intrBit;
+ }
+ else
+ DPRINTF(Uart, "UART InterEvent, not interrupting\n");
+
+}
+
+/* The linux serial driver (8250.c about line 1182) loops reading from
+ * the device until the device reports it has no more data to
+ * read. After a maximum of 255 iterations the code prints "serial8250
+ * too much work for irq X," and breaks out of the loop. Since the
+ * simulated system is so much slower than the actual system, if a
+ * user is typing on the keyboard it is very easy for them to provide
+ * input at a fast enough rate to not allow the loop to exit and thus
+ * the error to be printed. This magic number provides a delay between
+ * the time the UART receives a character to send to the simulated
+ * system and the time it actually notifies the system it has a
+ * character to send to alleviate this problem. --Ali
+ */
+void
+Uart8250::IntrEvent::scheduleIntr()
+{
+ static const Tick interval = (Tick)((Clock::Float::s / 2e9) * 450);
+ DPRINTF(Uart, "Scheduling IER interrupt for %#x, at cycle %lld\n", intrBit,
+ curTick + interval);
+ if (!scheduled())
+ schedule(curTick + interval);
+ else
+ reschedule(curTick + interval);
+}
+
+
+Uart8250::Uart8250(const string &name, SimConsole *c, MemoryController *mmu, Addr a,
+ Addr s, HierParams *hier, Bus *bus, Tick pio_latency, Platform *p)
+ : Uart(name, c, mmu, a, s, hier, bus, pio_latency, p),
+ txIntrEvent(this, TX_INT), rxIntrEvent(this, RX_INT)
+{
+ IER = 0;
+ DLAB = 0;
+ LCR = 0;
+ MCR = 0;
+
+}
+
+Fault
+Uart8250::read(MemReqPtr &req, uint8_t *data)
+{
+ Addr daddr = req->paddr - (addr & EV5::PAddrImplMask);
+ DPRINTF(Uart, " read register %#x\n", daddr);
+
+ assert(req->size == 1);
+
+ switch (daddr) {
+ case 0x0:
+ if (!(LCR & 0x80)) { // read byte
+ if (cons->dataAvailable())
+ cons->in(*data);
+ else {
+ *(uint8_t*)data = 0;
+ // A limited amount of these are ok.
+ DPRINTF(Uart, "empty read of RX register\n");
+ }
+ status &= ~RX_INT;
+ platform->clearConsoleInt();
+
+ if (cons->dataAvailable() && (IER & UART_IER_RDI))
+ rxIntrEvent.scheduleIntr();
+ } else { // dll divisor latch
+ ;
+ }
+ break;
+ case 0x1:
+ if (!(LCR & 0x80)) { // Intr Enable Register(IER)
+ *(uint8_t*)data = IER;
+ } else { // DLM divisor latch MSB
+ ;
+ }
+ break;
+ case 0x2: // Intr Identification Register (IIR)
+ DPRINTF(Uart, "IIR Read, status = %#x\n", (uint32_t)status);
+ if (status)
+ *(uint8_t*)data = 0;
+ else
+ *(uint8_t*)data = 1;
+ break;
+ case 0x3: // Line Control Register (LCR)
+ *(uint8_t*)data = LCR;
+ break;
+ case 0x4: // Modem Control Register (MCR)
+ break;
+ case 0x5: // Line Status Register (LSR)
+ uint8_t lsr;
+ lsr = 0;
+ // check if there are any bytes to be read
+ if (cons->dataAvailable())
+ lsr = UART_LSR_DR;
+ lsr |= UART_LSR_TEMT | UART_LSR_THRE;
+ *(uint8_t*)data = lsr;
+ break;
+ case 0x6: // Modem Status Register (MSR)
+ *(uint8_t*)data = 0;
+ break;
+ case 0x7: // Scratch Register (SCR)
+ *(uint8_t*)data = 0; // doesn't exist with at 8250.
+ break;
+ default:
+ panic("Tried to access a UART port that doesn't exist\n");
+ break;
+ }
+
+ return No_Fault;
+
+}
+
+Fault
+Uart8250::write(MemReqPtr &req, const uint8_t *data)
+{
+ Addr daddr = req->paddr - (addr & EV5::PAddrImplMask);
+
+ DPRINTF(Uart, " write register %#x value %#x\n", daddr, *(uint8_t*)data);
+
+ switch (daddr) {
+ case 0x0:
+ if (!(LCR & 0x80)) { // write byte
+ cons->out(*(uint8_t *)data);
+ platform->clearConsoleInt();
+ status &= ~TX_INT;
+ if (UART_IER_THRI & IER)
+ txIntrEvent.scheduleIntr();
+ } else { // dll divisor latch
+ ;
+ }
+ break;
+ case 0x1:
+ if (!(LCR & 0x80)) { // Intr Enable Register(IER)
+ IER = *(uint8_t*)data;
+ if (UART_IER_THRI & IER)
+ {
+ DPRINTF(Uart, "IER: IER_THRI set, scheduling TX intrrupt\n");
+ txIntrEvent.scheduleIntr();
+ }
+ else
+ {
+ DPRINTF(Uart, "IER: IER_THRI cleared, descheduling TX intrrupt\n");
+ if (txIntrEvent.scheduled())
+ txIntrEvent.deschedule();
+ if (status & TX_INT)
+ platform->clearConsoleInt();
+ status &= ~TX_INT;
+ }
+
+ if ((UART_IER_RDI & IER) && cons->dataAvailable()) {
+ DPRINTF(Uart, "IER: IER_RDI set, scheduling RX intrrupt\n");
+ rxIntrEvent.scheduleIntr();
+ } else {
+ DPRINTF(Uart, "IER: IER_RDI cleared, descheduling RX intrrupt\n");
+ if (rxIntrEvent.scheduled())
+ rxIntrEvent.deschedule();
+ if (status & RX_INT)
+ platform->clearConsoleInt();
+ status &= ~RX_INT;
+ }
+ } else { // DLM divisor latch MSB
+ ;
+ }
+ break;
+ case 0x2: // FIFO Control Register (FCR)
+ break;
+ case 0x3: // Line Control Register (LCR)
+ LCR = *(uint8_t*)data;
+ break;
+ case 0x4: // Modem Control Register (MCR)
+ if (*(uint8_t*)data == (UART_MCR_LOOP | 0x0A))
+ MCR = 0x9A;
+ break;
+ case 0x7: // Scratch Register (SCR)
+ // We are emulating a 8250 so we don't have a scratch reg
+ break;
+ default:
+ panic("Tried to access a UART port that doesn't exist\n");
+ break;
+ }
+ return No_Fault;
+}
+
+void
+Uart8250::dataAvailable()
+{
+ // if the kernel wants an interrupt when we have data
+ if (IER & UART_IER_RDI)
+ {
+ platform->postConsoleInt();
+ status |= RX_INT;
+ }
+
+}
+
+
+
+void
+Uart8250::serialize(ostream &os)
+{
+ SERIALIZE_SCALAR(status);
+ SERIALIZE_SCALAR(IER);
+ SERIALIZE_SCALAR(DLAB);
+ SERIALIZE_SCALAR(LCR);
+ SERIALIZE_SCALAR(MCR);
+ Tick rxintrwhen;
+ if (rxIntrEvent.scheduled())
+ rxintrwhen = rxIntrEvent.when();
+ else
+ rxintrwhen = 0;
+ Tick txintrwhen;
+ if (txIntrEvent.scheduled())
+ txintrwhen = txIntrEvent.when();
+ else
+ txintrwhen = 0;
+ SERIALIZE_SCALAR(rxintrwhen);
+ SERIALIZE_SCALAR(txintrwhen);
+}
+
+void
+Uart8250::unserialize(Checkpoint *cp, const std::string &section)
+{
+ UNSERIALIZE_SCALAR(status);
+ UNSERIALIZE_SCALAR(IER);
+ UNSERIALIZE_SCALAR(DLAB);
+ UNSERIALIZE_SCALAR(LCR);
+ UNSERIALIZE_SCALAR(MCR);
+ Tick rxintrwhen;
+ Tick txintrwhen;
+ UNSERIALIZE_SCALAR(rxintrwhen);
+ UNSERIALIZE_SCALAR(txintrwhen);
+ if (rxintrwhen != 0)
+ rxIntrEvent.schedule(rxintrwhen);
+ if (txintrwhen != 0)
+ txIntrEvent.schedule(txintrwhen);
+}
+
+BEGIN_DECLARE_SIM_OBJECT_PARAMS(Uart8250)
+
+ SimObjectParam<SimConsole *> console;
+ SimObjectParam<MemoryController *> mmu;
+ SimObjectParam<Platform *> platform;
+ Param<Addr> addr;
+ Param<Addr> size;
+ SimObjectParam<Bus*> io_bus;
+ Param<Tick> pio_latency;
+ SimObjectParam<HierParams *> hier;
+
+
+END_DECLARE_SIM_OBJECT_PARAMS(Uart8250)
+
+BEGIN_INIT_SIM_OBJECT_PARAMS(Uart8250)
+
+ INIT_PARAM(console, "The console"),
+ INIT_PARAM(mmu, "Memory Controller"),
+ INIT_PARAM(platform, "Pointer to platfrom"),
+ INIT_PARAM(addr, "Device Address"),
+ INIT_PARAM_DFLT(size, "Device size", 0x8),
+ INIT_PARAM_DFLT(io_bus, "The IO Bus to attach to", NULL),
+ INIT_PARAM_DFLT(pio_latency, "Programmed IO latency in bus cycles", 1),
+ INIT_PARAM_DFLT(hier, "Hierarchy global variables", &defaultHierParams)
+
+END_INIT_SIM_OBJECT_PARAMS(Uart8250)
+
+CREATE_SIM_OBJECT(Uart8250)
+{
+ return new Uart8250(getInstanceName(), console, mmu, addr, size, hier, io_bus,
+ pio_latency, platform);
+}
+
+REGISTER_SIM_OBJECT("Uart8250", Uart8250)
diff --git a/dev/uart8250.hh b/dev/uart8250.hh
new file mode 100644
index 000000000..046388fb5
--- /dev/null
+++ b/dev/uart8250.hh
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2004 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @file
+ * Defines a 8250 UART
+ */
+
+#ifndef __TSUNAMI_UART_HH__
+#define __TSUNAMI_UART_HH__
+
+#include "dev/tsunamireg.h"
+#include "base/range.hh"
+#include "dev/io_device.hh"
+#include "dev/uart.hh"
+
+class SimConsole;
+class Platform;
+
+class Uart8250 : public Uart
+{
+
+
+ protected:
+ uint8_t IER, DLAB, LCR, MCR;
+
+ class IntrEvent : public Event
+ {
+ protected:
+ Uart8250 *uart;
+ int intrBit;
+ public:
+ IntrEvent(Uart8250 *u, int bit);
+ virtual void process();
+ virtual const char *description();
+ void scheduleIntr();
+ };
+
+ IntrEvent txIntrEvent;
+ IntrEvent rxIntrEvent;
+
+ public:
+ Uart8250(const std::string &name, SimConsole *c, MemoryController *mmu,
+ Addr a, Addr s, HierParams *hier, Bus *bus, Tick pio_latency,
+ Platform *p);
+
+ virtual Fault read(MemReqPtr &req, uint8_t *data);
+ virtual Fault write(MemReqPtr &req, const uint8_t *data);
+
+
+ /**
+ * Inform the uart that there is data available.
+ */
+ virtual void dataAvailable();
+
+
+ /**
+ * Return if we have an interrupt pending
+ * @return interrupt status
+ */
+ virtual bool intStatus() { return status ? true : false; }
+
+ virtual void serialize(std::ostream &os);
+ virtual void unserialize(Checkpoint *cp, const std::string &section);
+
+};
+
+#endif // __TSUNAMI_UART_HH__
diff --git a/python/m5/objects/Uart.py b/python/m5/objects/Uart.py
index cfb09acad..57b8b44af 100644
--- a/python/m5/objects/Uart.py
+++ b/python/m5/objects/Uart.py
@@ -3,5 +3,13 @@ from Device import PioDevice
class Uart(PioDevice):
type = 'Uart'
+ abstract = True
console = Param.SimConsole(Parent.any, "The console")
size = Param.Addr(0x8, "Device size")
+
+class Uart8250(Uart):
+ type = 'Uart8250'
+
+class Uart8530(Uart):
+ type = 'Uart8530'
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 19:16:35 +0000