117 lines
4.2 KiB
C++
117 lines
4.2 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id$
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2002-2021 The Bochs Project
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library 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 GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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//
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/////////////////////////////////////////////////////////////////////////
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#ifndef BX_DEVICES_IOAPIC_H
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#define BX_DEVICES_IOAPIC_H
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#if BX_SUPPORT_APIC
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typedef Bit32u apic_dest_t; /* same definition in apic.h */
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extern int apic_bus_deliver_lowest_priority(Bit8u vector, apic_dest_t dest, bool trig_mode, bool broadcast);
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extern int apic_bus_deliver_interrupt(Bit8u vector, apic_dest_t dest, Bit8u delivery_mode, bool logical_dest, bool level, bool trig_mode);
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extern int apic_bus_broadcast_interrupt(Bit8u vector, Bit8u delivery_mode, bool trig_mode, int exclude_cpu);
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#define BX_IOAPIC_NUM_PINS (0x18)
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// use the same version as 82093 IOAPIC (0x00170011)
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const Bit32u BX_IOAPIC_VERSION_ID = (((BX_IOAPIC_NUM_PINS - 1) << 16) | 0x11);
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class bx_io_redirect_entry_t {
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Bit32u hi, lo;
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public:
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bx_io_redirect_entry_t(): hi(0), lo(0x10000) {}
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Bit8u destination() const { return (Bit8u)(hi >> 24); }
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bool is_masked() const { return (bool)((lo >> 16) & 1); }
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Bit8u trigger_mode() const { return (Bit8u)((lo >> 15) & 1); }
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bool remote_irr() const { return (bool)((lo >> 14) & 1); }
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Bit8u pin_polarity() const { return (Bit8u)((lo >> 13) & 1); }
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bool delivery_status() const { return (bool)((lo >> 12) & 1); }
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Bit8u destination_mode() const { return (Bit8u)((lo >> 11) & 1); }
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Bit8u delivery_mode() const { return (Bit8u)((lo >> 8) & 7); }
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Bit8u vector() const { return (Bit8u)(lo & 0xff); }
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void set_delivery_status() { lo |= (1<<12); }
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void clear_delivery_status() { lo &= ~(1<<12); }
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void set_remote_irr() { lo |= (1<<14); }
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void clear_remote_irr() { lo &= ~(1<<14); }
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Bit32u get_lo_part () const { return lo; }
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Bit32u get_hi_part () const { return hi; }
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void set_lo_part (Bit32u val_lo_part) {
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// keep high 32 bits of value, replace low 32, ignore R/O bits
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lo = val_lo_part & 0xffffafff;
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}
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void set_hi_part (Bit32u val_hi_part) {
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// keep low 32 bits of value, replace high 32
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hi = val_hi_part;
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}
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void sprintf_self(char *buf);
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void register_state(bx_param_c *parent);
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};
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class bx_ioapic_c : public bx_ioapic_stub_c {
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public:
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bx_ioapic_c();
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virtual ~bx_ioapic_c();
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virtual void init();
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virtual void reset(unsigned type);
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virtual void register_state(void);
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#if BX_DEBUGGER
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virtual void debug_dump(int argc, char **argv);
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#endif
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virtual void set_enabled(bool enabled, Bit16u base_offset);
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virtual void receive_eoi(Bit8u vector);
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virtual void set_irq_level(Bit8u int_in, bool level);
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Bit32u read_aligned(bx_phy_address address);
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void write_aligned(bx_phy_address address, Bit32u data);
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private:
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void set_id(Bit32u new_id) { id = new_id; }
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Bit32u get_id() const { return id; }
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void service_ioapic(void);
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bool enabled;
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bx_phy_address base_addr;
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Bit32u id;
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Bit32u ioregsel; // selects between various registers
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Bit32u intin;
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// interrupt request bitmask, not visible from the outside. Bits in the
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// irr are set when trigger_irq is called, and cleared when the interrupt
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// is delivered to the processor. If an interrupt is masked, the irr
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// will still be set but delivery will not occur until it is unmasked.
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// It's not clear if this is how the real device works.
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Bit32u irr;
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bx_io_redirect_entry_t ioredtbl[BX_IOAPIC_NUM_PINS]; // table of redirections
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};
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#endif
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#endif
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