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72 lines
2 KiB
C
72 lines
2 KiB
C
/*
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* QEMU Geforce NV2A implementation
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*
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* Copyright (c) 2012 espes
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* Copyright (c) 2015 Jannik Vogel
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* Copyright (c) 2018 Matt Borgerson
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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, see <http://www.gnu.org/licenses/>.
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*/
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uint64_t pcrtc_read(void *opaque, hwaddr addr, unsigned int size)
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{
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NV2AState *d = (NV2AState *)opaque;
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uint64_t r = 0;
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switch (addr) {
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case NV_PCRTC_INTR_0:
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r = d->pcrtc.pending_interrupts;
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break;
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case NV_PCRTC_INTR_EN_0:
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r = d->pcrtc.enabled_interrupts;
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break;
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case NV_PCRTC_START:
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r = d->pcrtc.start;
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break;
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default:
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break;
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}
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reg_log_read(NV_PCRTC, addr, r);
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return r;
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}
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void pcrtc_write(void *opaque, hwaddr addr, uint64_t val, unsigned int size)
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{
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NV2AState *d = (NV2AState *)opaque;
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reg_log_write(NV_PCRTC, addr, val);
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switch (addr) {
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case NV_PCRTC_INTR_0:
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d->pcrtc.pending_interrupts &= ~val;
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update_irq(d);
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break;
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case NV_PCRTC_INTR_EN_0:
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d->pcrtc.enabled_interrupts = val;
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update_irq(d);
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break;
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case NV_PCRTC_START:
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val &= 0x07FFFFFF;
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// assert(val < memory_region_size(d->vram));
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d->pcrtc.start = val;
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NV2A_DPRINTF("PCRTC_START - %x %x %x %x\n",
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d->vram_ptr[val+64], d->vram_ptr[val+64+1],
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d->vram_ptr[val+64+2], d->vram_ptr[val+64+3]);
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break;
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default:
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break;
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}
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}
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