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/////////////////////////////////////////////////////////////////////////
// $Id: pic.h,v 1.11 2003/08/04 16:03:09 akrisak Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#if BX_USE_PIC_SMF
# define BX_PIC_SMF static
# define BX_PIC_THIS thePic->
#else
# define BX_PIC_SMF
# define BX_PIC_THIS this->
#endif
typedef struct {
Bit8u single_PIC; /* 0=cascaded PIC, 1=master only */
Bit8u interrupt_offset; /* programmable interrupt vector offset */
union {
Bit8u slave_connect_mask; /* for master, a bit for each interrupt line
0=not connect to a slave, 1=connected */
Bit8u slave_id; /* for slave, id number of slave PIC */
} u;
Bit8u sfnm; /* specially fully nested mode: 0=no, 1=yes*/
Bit8u buffered_mode; /* 0=no buffered mode, 1=buffered mode */
Bit8u master_slave; /* master/slave: 0=slave PIC, 1=master PIC */
Bit8u auto_eoi; /* 0=manual EOI, 1=automatic EOI */
Bit8u imr; /* interrupt mask register, 1=masked */
Bit8u isr; /* in service register */
Bit8u irr; /* interrupt request register */
Bit8u read_reg_select; /* 0=IRR, 1=ISR */
Bit8u irq; /* current IRQ number */
Bit8u lowest_priority; /* current lowest priority irq */
bx_bool INT; /* INT request pin of PIC */
bx_bool IRQ_line[8]; /* IRQ pins of PIC */
struct {
bx_bool in_init;
bx_bool requires_4;
int byte_expected;
} init;
bx_bool special_mask;
bx_bool polled; /* Set when poll command is issued. */
bx_bool rotate_on_autoeoi; /* Set when should rotate in auto-eoi mode. */
} bx_pic_t;
class bx_pic_c : public bx_pic_stub_c {
public:
bx_pic_c(void);
~bx_pic_c(void);
virtual void init(void);
virtual void reset(unsigned type);
virtual void lower_irq(unsigned irq_no);
virtual void raise_irq(unsigned irq_no);
virtual Bit8u IAC(void);
virtual void show_pic_state(void);
private:
struct {
bx_pic_t master_pic;
bx_pic_t slave_pic;
} s;
static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len);
static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
#if !BX_USE_PIC_SMF
Bit32u read(Bit32u address, unsigned io_len);
void write(Bit32u address, Bit32u value, unsigned io_len);
#endif
BX_PIC_SMF void service_master_pic(void);
BX_PIC_SMF void service_slave_pic(void);
BX_PIC_SMF void clear_highest_interrupt(bx_pic_t *pic);
};
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