From bb5377899a2213be2ecaab25fa4858fae81d0a12 Mon Sep 17 00:00:00 2001
From: Ali Saidi <Ali.Saidi@arm.com>
Date: Mon, 23 Aug 2010 11:18:40 -0500
Subject: ARM: Add system for ARM/Linux and bootstrapping

---
 src/arch/arm/linux/system.cc | 124 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 src/arch/arm/linux/system.cc

(limited to 'src/arch/arm/linux/system.cc')

diff --git a/src/arch/arm/linux/system.cc b/src/arch/arm/linux/system.cc
new file mode 100644
index 000000000..7c4e00921
--- /dev/null
+++ b/src/arch/arm/linux/system.cc
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2010 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder.  You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
+ * Copyright (c) 2002-2006 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.
+ *
+ * Authors: Ali Saidi
+ */
+
+#include "arch/arm/isa_traits.hh"
+#include "arch/arm/linux/atag.hh"
+#include "arch/arm/linux/system.hh"
+#include "base/loader/object_file.hh"
+#include "base/loader/symtab.hh"
+#include "mem/physical.hh"
+
+using namespace ArmISA;
+
+LinuxArmSystem::LinuxArmSystem(Params *p)
+    : ArmSystem(p)
+{
+    // Load symbols at physical address, we might not want
+    // to do this perminately, for but early bootup work
+    // it is helpfulp.
+    kernel->loadGlobalSymbols(kernelSymtab, loadAddrMask);
+    kernel->loadGlobalSymbols(debugSymbolTable, loadAddrMask);
+
+    // Setup boot data structure
+    AtagCore *ac = new AtagCore;
+    ac->flags(1); // read-only
+    ac->pagesize(8192);
+    ac->rootdev(0);
+
+    AtagMem *am = new AtagMem;
+    am->memSize(params()->physmem->size());
+    am->memStart(params()->physmem->start());
+
+    AtagCmdline *ad = new AtagCmdline;
+    ad->cmdline(params()->boot_osflags);
+
+    DPRINTF(Loader, "boot command line %d bytes: %s\n", ad->size() <<2, params()->boot_osflags.c_str());
+
+    AtagNone *an = new AtagNone;
+
+    uint32_t size = ac->size() + am->size() + ad->size() + an->size();
+    uint32_t offset = 0;
+    uint8_t *boot_data = new uint8_t[size << 2];
+
+    offset += ac->copyOut(boot_data + offset);
+    offset += am->copyOut(boot_data + offset);
+    offset += ad->copyOut(boot_data + offset);
+    offset += an->copyOut(boot_data + offset);
+
+    DPRINTF(Loader, "Boot atags was %d bytes in total\n", size << 2);
+    DDUMP(Loader, boot_data, size << 2);
+
+    functionalPort.writeBlob(ParamsList, boot_data, size << 2);
+
+#ifndef NDEBUG
+    kernelPanicEvent = addKernelFuncEvent<BreakPCEvent>("panic");
+    if (!kernelPanicEvent)
+        panic("could not find kernel symbol \'panic\'");
+#endif
+}
+
+void
+LinuxArmSystem::startup()
+{
+    ArmSystem::startup();
+    ThreadContext *tc = threadContexts[0];
+
+    // Set the initial PC to be at start of the kernel code
+    tc->setPC(tc->getSystemPtr()->kernelEntry & loadAddrMask);
+    tc->setNextPC(tc->readPC() + sizeof(MachInst));
+
+    // Setup the machine type
+    tc->setIntReg(0, 0);
+    tc->setIntReg(1, params()->machine_type);
+    tc->setIntReg(2, ParamsList);
+}
+
+LinuxArmSystem::~LinuxArmSystem()
+{
+}
+
+
+LinuxArmSystem *
+LinuxArmSystemParams::create()
+{
+    return new LinuxArmSystem(this);
+}
-- 
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