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/* |
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* basic-cpu.hpp - Basic CPU definitions |
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* |
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* Kheperix (C) 2003 Gwenole Beauchesne |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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#ifndef BASIC_CPU_H |
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#define BASIC_CPU_H |
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|
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#include "sysdeps.h" |
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#include <setjmp.h> |
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#include "task-plugin.hpp" |
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|
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/** |
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* Generic register value |
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**/ |
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|
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union any_register |
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{ |
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uint32 i; |
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uint64 j; |
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float f; |
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double d; |
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|
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// Explicit casts may be required to use those constructors |
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any_register(uint32 v = 0) : i(v) { } |
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any_register(uint64 v) : j(v) { } |
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any_register(float v) : f(v) { } |
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any_register(double v) : d(v) { } |
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}; |
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|
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/** |
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* Basic CPU model |
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**/ |
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|
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struct task_struct; |
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|
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struct basic_cpu |
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: public task_plugin |
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{ |
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// Basic register set |
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struct registers |
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{ |
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enum { |
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PC = -1, // Program Counter |
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SP = -2, // Stack Pointer |
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}; |
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}; |
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|
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// Constructor & destructor |
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basic_cpu(task_struct * parent_task); |
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virtual ~basic_cpu(); |
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|
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// Execute code at current address |
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virtual void execute() = 0; |
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|
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// Set VALUE to register ID |
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virtual void set_register(int id, any_register const & value) = 0; |
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|
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// Get register ID |
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virtual any_register get_register(int id) = 0; |
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|
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// Start emulation, returns exit status |
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int run(); |
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|
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// Stop emulation |
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void exit(int status); |
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|
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private: |
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jmp_buf env; |
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int exit_status; |
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}; |
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|
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// Alias basic register set |
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typedef basic_cpu::registers basic_registers; |
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|
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#endif /* BASIC_CPU_H */ |
