diff options
Diffstat (limited to 'tools/ioemu/iodev/pic.h')
| -rw-r--r-- | tools/ioemu/iodev/pic.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/tools/ioemu/iodev/pic.h b/tools/ioemu/iodev/pic.h new file mode 100644 index 0000000000..cfdb1263ef --- /dev/null +++ b/tools/ioemu/iodev/pic.h @@ -0,0 +1,97 @@ +///////////////////////////////////////////////////////////////////////// +// $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); + }; |