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2e3e5c7e92
Examining the migration stream it can be seen that the mos6522 device state is being stored separately rather than as part of the CUDA device which is incorrect (and likely to cause issues if another mos6522 device is added to the machine). Resolve this by embedding the mos6522_cuda device directly within the CUDA device rather than using a QOM object link to reference the device separately. Note that we also bump the version in vmstate_cuda to reflect this change: this isn't particularly important for the moment as the Mac machine migration isn't 100% reliable due to issues migrating the timebase under TCG. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
155 lines
4.8 KiB
C
155 lines
4.8 KiB
C
/*
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* QEMU MOS6522 VIA emulation
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*
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* Copyright (c) 2004-2007 Fabrice Bellard
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* Copyright (c) 2007 Jocelyn Mayer
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* Copyright (c) 2018 Mark Cave-Ayland
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef MOS6522_H
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#define MOS6522_H
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#include "exec/memory.h"
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#include "hw/sysbus.h"
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#include "hw/ide/internal.h"
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#include "hw/input/adb.h"
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/* Bits in ACR */
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#define SR_CTRL 0x1c /* Shift register control bits */
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#define SR_EXT 0x0c /* Shift on external clock */
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#define SR_OUT 0x10 /* Shift out if 1 */
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/* Bits in IFR and IER */
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#define IER_SET 0x80 /* set bits in IER */
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#define IER_CLR 0 /* clear bits in IER */
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#define CA2_INT 0x01
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#define CA1_INT 0x02
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#define SR_INT 0x04 /* Shift register full/empty */
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#define CB2_INT 0x08
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#define CB1_INT 0x10
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#define T2_INT 0x20 /* Timer 2 interrupt */
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#define T1_INT 0x40 /* Timer 1 interrupt */
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/* Bits in ACR */
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#define T1MODE 0xc0 /* Timer 1 mode */
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#define T1MODE_CONT 0x40 /* continuous interrupts */
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/* VIA registers */
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#define VIA_REG_B 0x00
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#define VIA_REG_A 0x01
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#define VIA_REG_DIRB 0x02
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#define VIA_REG_DIRA 0x03
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#define VIA_REG_T1CL 0x04
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#define VIA_REG_T1CH 0x05
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#define VIA_REG_T1LL 0x06
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#define VIA_REG_T1LH 0x07
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#define VIA_REG_T2CL 0x08
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#define VIA_REG_T2CH 0x09
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#define VIA_REG_SR 0x0a
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#define VIA_REG_ACR 0x0b
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#define VIA_REG_PCR 0x0c
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#define VIA_REG_IFR 0x0d
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#define VIA_REG_IER 0x0e
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#define VIA_REG_ANH 0x0f
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/**
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* MOS6522Timer:
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* @counter_value: counter value at load time
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*/
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typedef struct MOS6522Timer {
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int index;
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uint16_t latch;
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uint16_t counter_value;
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int64_t load_time;
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int64_t next_irq_time;
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uint64_t frequency;
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QEMUTimer *timer;
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} MOS6522Timer;
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/**
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* MOS6522State:
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* @b: B-side data
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* @a: A-side data
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* @dirb: B-side direction (1=output)
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* @dira: A-side direction (1=output)
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* @sr: Shift register
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* @acr: Auxiliary control register
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* @pcr: Peripheral control register
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* @ifr: Interrupt flag register
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* @ier: Interrupt enable register
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* @anh: A-side data, no handshake
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* @last_b: last value of B register
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* @last_acr: last value of ACR register
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*/
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typedef struct MOS6522State {
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/*< private >*/
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SysBusDevice parent_obj;
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/*< public >*/
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MemoryRegion mem;
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/* VIA registers */
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uint8_t b;
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uint8_t a;
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uint8_t dirb;
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uint8_t dira;
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uint8_t sr;
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uint8_t acr;
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uint8_t pcr;
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uint8_t ifr;
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uint8_t ier;
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uint8_t anh;
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MOS6522Timer timers[2];
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uint64_t frequency;
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qemu_irq irq;
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} MOS6522State;
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#define TYPE_MOS6522 "mos6522"
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#define MOS6522(obj) OBJECT_CHECK(MOS6522State, (obj), TYPE_MOS6522)
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typedef struct MOS6522DeviceClass {
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DeviceClass parent_class;
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DeviceRealize parent_realize;
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void (*set_sr_int)(MOS6522State *dev);
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void (*portB_write)(MOS6522State *dev);
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void (*portA_write)(MOS6522State *dev);
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/* These are used to influence the CUDA MacOS timebase calibration */
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uint64_t (*get_timer1_counter_value)(MOS6522State *dev, MOS6522Timer *ti);
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uint64_t (*get_timer2_counter_value)(MOS6522State *dev, MOS6522Timer *ti);
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uint64_t (*get_timer1_load_time)(MOS6522State *dev, MOS6522Timer *ti);
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uint64_t (*get_timer2_load_time)(MOS6522State *dev, MOS6522Timer *ti);
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} MOS6522DeviceClass;
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#define MOS6522_DEVICE_CLASS(cls) \
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OBJECT_CLASS_CHECK(MOS6522DeviceClass, (cls), TYPE_MOS6522)
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#define MOS6522_DEVICE_GET_CLASS(obj) \
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OBJECT_GET_CLASS(MOS6522DeviceClass, (obj), TYPE_MOS6522)
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extern const VMStateDescription vmstate_mos6522;
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uint64_t mos6522_read(void *opaque, hwaddr addr, unsigned size);
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void mos6522_write(void *opaque, hwaddr addr, uint64_t val, unsigned size);
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#endif /* MOS6522_H */
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