mirror of https://github.com/xemu-project/xemu.git
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*
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* QEMU Geforce NV2A implementation
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*
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* Copyright (c) 2021 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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#include "nv2a_int.h"
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uint64_t prmdio_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_USER_DAC_WRITE_MODE_ADDRESS:
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r = d->puserdac.write_mode_address / 3;
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break;
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default:
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break;
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}
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nv2a_reg_log_read(NV_PRMDIO, addr, size, r);
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return r;
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}
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void prmdio_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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nv2a_reg_log_write(NV_PRMDIO, addr, size, val);
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switch (addr) {
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case NV_USER_DAC_WRITE_MODE_ADDRESS:
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d->puserdac.write_mode_address = (val & 0xff) * 3;
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break;
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case NV_USER_DAC_PALETTE_DATA:
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/* FIXME: Confirm wrap-around */
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d->puserdac.palette[d->puserdac.write_mode_address++ % (256*3)] = val;
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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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