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ARM: Add system for ARM/Linux and bootstrapping

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This commit is contained in:
Ali Saidi 2010-08-23 11:18:40 -05:00
parent 8ed4f0a02c
commit bb5377899a
7 changed files with 520 additions and 4 deletions
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18
src/arch/arm/ArmSystem.py
View file

@ -1,6 +1,15 @@
# Copyright (c) 2009 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.
#
# 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
@ -30,7 +39,16 @@ from m5.params import *
from System import System
class ArmMachineType(Enum):
map = {'RealView_EB' : 827,
'RealView_PBX' : 1901 }
class ArmSystem(System):
type = 'ArmSystem'
load_addr_mask = 0xffffffff
class LinuxArmSystem(ArmSystem):
type = 'LinuxArmSystem'
load_addr_mask = 0x0fffffff
machine_type = Param.ArmMachineType('RealView_PBX',
"Machine id from http://www.arm.linux.org.uk/developer/machines/")

1
src/arch/arm/SConscript
View file

@ -73,6 +73,7 @@ if env['TARGET_ISA'] == 'arm':
Source('interrupts.cc')
Source('stacktrace.cc')
Source('system.cc')
Source('linux/system.cc')
Source('table_walker.cc')
SimObject('ArmInterrupts.py')

4
src/arch/arm/faults.cc
View file

@ -136,9 +136,9 @@ ArmFault::invoke(ThreadContext *tc)
panic("unknown Mode\n");
}
Addr pc = tc->readPC();
Addr pc M5_VAR_USED = tc->readPC();
Addr newPc = getVector(tc) | (sctlr.te ? (ULL(1) << PcTBitShift) : 0);
DPRINTF(Faults, "Invoking Fault: %s cpsr: %#x PC: %#x lr: %#x newVector: %#x\n",
DPRINTF(Faults, "Invoking Fault:%s cpsr:%#x PC:%#x lr:%#x newVec: %#x\n",
name(), cpsr, pc, tc->readIntReg(INTREG_LR), newPc);
tc->setPC(newPc);
tc->setNextPC(newPc + cpsr.t ? 2 : 4 );

282
src/arch/arm/linux/atag.hh Normal file
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@ -0,0 +1,282 @@
/*
* 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.
*
* 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
*/
#ifndef __ARCH_ARM_LINUX_ATAG_HH__
#define __ARCH_ARM_LINUX_ATAG_HH__
#include <cstring>
#include <string>
#include "base/types.hh"
enum {
CoreTag = 0x54410001,
MemTag = 0x54410002,
RevTag = 0x54410007,
SerialTag = 0x54410006,
CmdTag = 0x54410009,
NoneTag = 0x00000000,
};
class AtagHeader
{
protected:
uint32_t *storage;
uint32_t _size;
public:
/** Tag (normally starts with 'T''A' and 16 bits of number */
virtual uint32_t tag() = 0;
/** If the header should be 0 size */
virtual bool null() { return false; }
uint32_t size() const { return _size; }
AtagHeader(uint32_t s)
: _size(s)
{
storage = new uint32_t[size()];
}
virtual ~AtagHeader()
{
delete[] storage;
}
uint32_t copyOut(uint8_t *p)
{
storage[0] = null() ? 0 : size();
storage[1] = tag();
memcpy(p, storage, size() << 2);
return size() << 2;
}
};
class AtagCore : public AtagHeader
{
public:
static const uint32_t Size = 5;
uint32_t tag() { return CoreTag; }
void flags(uint32_t i) { storage[2] = i; }
void pagesize(uint32_t i) { storage[3] = i; }
void rootdev(uint32_t i) { storage[4] = i; }
AtagCore()
: AtagHeader(Size)
{}
};
class AtagMem : public AtagHeader
{
public:
static const uint32_t Size = 4;
uint32_t tag() { return MemTag; }
void memSize(uint32_t i) { storage[2] = i; }
void memStart(uint32_t i) { storage[3] = i; }
AtagMem()
: AtagHeader(Size)
{}
};
class AtagRev : public AtagHeader
{
public:
static const uint32_t Size = 3;
uint32_t tag() { return RevTag; }
void rev(uint32_t i) { storage[2] = i; }
AtagRev()
: AtagHeader(Size)
{}
};
class AtagSerial : public AtagHeader
{
public:
static const uint32_t Size = 4;
uint32_t tag() { return SerialTag; }
void sn(uint64_t i) { storage[2] = (uint32_t)i; storage[3] = i >> 32; }
AtagSerial()
: AtagHeader(Size)
{}
};
class AtagCmdline : public AtagHeader
{
public:
static const uint32_t Size = 3;
uint32_t tag() { return CmdTag; }
void cmdline(const std::string &s)
{
// Add one for null terminator
int len = s.length() + 1;
// 2 + ceiling(len/4)
_size = 2 + ((len + 3) >> 2);
delete[] storage;
storage = new uint32_t[size()];
strcpy((char*)&storage[2] , s.c_str());
}
AtagCmdline()
: AtagHeader(Size)
{}
};
class AtagNone : public AtagHeader
{
public:
static const uint32_t Size = 2;
virtual bool null() { return true; }
uint32_t tag() { return NoneTag; }
AtagNone()
: AtagHeader(Size)
{}
};
/*
//
// example ARM Linux bootloader code
// this example is distributed under the BSD licence
// Code taken from http://www.simtec.co.uk/products/SWLINUX/files/booting_article.html
///
// list of possible tags
#define ATAG_NONE 0x00000000
#define ATAG_CORE 0x54410001
#define ATAG_MEM 0x54410002
#define ATAG_VIDEOTEXT 0x54410003
#define ATAG_RAMDISK 0x54410004
#define ATAG_INITRD2 0x54420005
#define ATAG_SERIAL 0x54410006
#define ATAG_REVISION 0x54410007
#define ATAG_VIDEOLFB 0x54410008
#define ATAG_CMDLINE 0x54410009
// structures for each atag
struct atag_header {
u32 size; // length of tag in words including this header
u32 tag; // tag type
};
struct atag_core {
u32 flags;
u32 pagesize;
u32 rootdev;
};
struct atag_mem {
u32 size;
u32 start;
};
struct atag_videotext {
u8 x;
u8 y;
u16 video_page;
u8 video_mode;
u8 video_cols;
u16 video_ega_bx;
u8 video_lines;
u8 video_isvga;
u16 video_points;
};
struct atag_ramdisk {
u32 flags;
u32 size;
u32 start;
};
struct atag_initrd2 {
u32 start;
u32 size;
};
struct atag_serialnr {
u32 low;
u32 high;
};
struct atag_revision {
u32 rev;
};
struct atag_videolfb {
u16 lfb_width;
u16 lfb_height;
u16 lfb_depth;
u16 lfb_linelength;
u32 lfb_base;
u32 lfb_size;
u8 red_size;
u8 red_pos;
u8 green_size;
u8 green_pos;
u8 blue_size;
u8 blue_pos;
u8 rsvd_size;
u8 rsvd_pos;
};
struct atag_cmdline {
char cmdline[1];
};
struct atag {
struct atag_header hdr;
union {
struct atag_core core;
struct atag_mem mem;
struct atag_videotext videotext;
struct atag_ramdisk ramdisk;
struct atag_initrd2 initrd2;
struct atag_serialnr serialnr;
struct atag_revision revision;
struct atag_videolfb videolfb;
struct atag_cmdline cmdline;
} u;
};
*/
#endif // __ARCH_ARM_LINUX_ATAG_HH__

124
src/arch/arm/linux/system.cc Normal file
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@ -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);
}

80
src/arch/arm/linux/system.hh Normal file
View file

@ -0,0 +1,80 @@
/*
* 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) 2002-2005 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
*/
#ifndef __ARCH_ARM_LINUX_SYSTEM_HH__
#define __ARCH_ARM_LINUX_SYSTEM_HH__
#include <string>
#include <vector>
#include "arch/arm/system.hh"
#include "kern/linux/events.hh"
#include "params/LinuxArmSystem.hh"
class LinuxArmSystem : public ArmSystem
{
protected:
static const int ParamsList = 0x100;
public:
/** Boilerplate params code */
typedef LinuxArmSystemParams Params;
const Params *
params() const
{
return dynamic_cast<const Params *>(_params);
}
LinuxArmSystem(Params *p);
~LinuxArmSystem();
/** Initialize the CPU for booting */
void startup();
private:
#ifndef NDEBUG
/** Event to halt the simulator if the kernel calls panic() */
BreakPCEvent *kernelPanicEvent;
#endif
};
#endif // __ARCH_ARM_LINUX_SYSTEM_HH__

15
src/arch/arm/system.cc
View file

@ -1,4 +1,16 @@
/*
* 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.
*
@ -30,8 +42,7 @@
#include "arch/arm/system.hh"
using namespace LittleEndianGuest;
using namespace ArmISA;
ArmSystem::ArmSystem(Params *p)
: System(p)