94 lines
3.0 KiB
C++
94 lines
3.0 KiB
C++
// Copyright (C) 2001 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 bx_pic.
|
|
#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 */
|
|
Boolean INT; /* INT request pin of PIC */
|
|
struct {
|
|
Boolean in_init;
|
|
Boolean requires_4;
|
|
int byte_expected;
|
|
} init;
|
|
Boolean special_mask;
|
|
} bx_pic_t;
|
|
|
|
|
|
class bx_pic_c {
|
|
|
|
public:
|
|
bx_pic_c(void);
|
|
~bx_pic_c(void);
|
|
BX_PIC_SMF void init(bx_devices_c *);
|
|
BX_PIC_SMF void trigger_irq(unsigned irq_no);
|
|
BX_PIC_SMF void untrigger_irq(unsigned irq_no);
|
|
BX_PIC_SMF Bit8u IAC(void);
|
|
|
|
private:
|
|
struct {
|
|
bx_pic_t master_pic;
|
|
bx_pic_t slave_pic;
|
|
} s;
|
|
|
|
bx_devices_c *devices;
|
|
|
|
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 show_pic_state(void);
|
|
};
|
|
|
|
#if BX_USE_PIC_SMF
|
|
extern bx_pic_c bx_pic;
|
|
#endif
|