1/*
2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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112 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
113 *
114 * Taken from NetBSD
115 *
116 * "Stub" to allow remote cpu to debug over a serial line using gdb.
117 */
118
119#include <sys/signal.h>
120#include <unistd.h>
121
122#include <string>
123
124#include "config/full_system.hh"
125#if FULL_SYSTEM
126#include "arch/alpha/vtophys.hh"
127#endif
128
129#include "arch/alpha/kgdb.h"
130#include "arch/alpha/utility.hh"

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137#include "cpu/static_inst.hh"
138#include "mem/physical.hh"
139#include "mem/port.hh"
140#include "sim/system.hh"
141
142using namespace std;
143using namespace AlphaISA;
144
145RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
146 : BaseRemoteGDB(_system, tc, KGDB_NUMREGS)
147{
148 memset(gdbregs.regs, 0, gdbregs.bytes());
149}
150
151/*
152 * Determine if the mapping at va..(va+len) is valid.
153 */
154bool
155RemoteGDB::acc(Addr va, size_t len)
156{
157#if !FULL_SYSTEM
158 panic("acc function needs to be rewritten for SE mode\n");
159#else
160 Addr last_va;
161

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170 return true;
171 } else {
172 DPRINTF(GDBAcc, "acc: Mapping invalid %#x > K0SEG + size\n",
173 va);
174 return false;
175 }
176 }
177
178 /**
179 * This code says that all accesses to palcode (instruction
180 * and data) are valid since there isn't a va->pa mapping
181 * because palcode is accessed physically. At some point this
182 * should probably be cleaned up but there is no easy way to
183 * do it.
184 */
185
186 if (PcPAL(va) || va < 0x10000)
187 return true;
188
189 Addr ptbr = context->readMiscRegNoEffect(IPR_PALtemp20);
190 PageTableEntry pte =
191 kernel_pte_lookup(context->getPhysPort(), ptbr, va);
192 if (!pte.valid()) {
193 DPRINTF(GDBAcc, "acc: %#x pte is invalid\n", va);
194 return false;
195 }
196 va += PageBytes;
197 } while (va < last_va);
198
199 DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va);
200 return true;
201#endif
202}
203
204/*
205 * Translate the kernel debugger register format into the GDB register
206 * format.
207 */
208void
209RemoteGDB::getregs()
210{
211 memset(gdbregs.regs, 0, gdbregs.bytes());
212
213 gdbregs.regs[KGDB_REG_PC] = context->readPC();
214
215 // @todo: Currently this is very Alpha specific.

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225
226#ifdef KGDB_FP_REGS
227 for (int i = 0; i < NumFloatArchRegs; ++i) {
228 gdbregs.regs[i + KGDB_REG_F0] = context->readFloatRegBits(i);
229 }
230#endif
231}
232
233/*
234 * Translate the GDB register format into the kernel debugger register
235 * format.
236 */
237void
238RemoteGDB::setregs()
239{
240 // @todo: Currently this is very Alpha specific.
241 if (PcPAL(gdbregs.regs[KGDB_REG_PC])) {
242 for (int i = 0; i < NumIntArchRegs; ++i) {
243 context->setIntReg(reg_redir[i], gdbregs.regs[i]);
244 }

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