87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
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/*
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* xlnx_dpdma.h
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*
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* Copyright (C) 2015 : GreenSocs Ltd
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* http://www.greensocs.com/ , email: info@greensocs.com
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*
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* Developed by :
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* Frederic Konrad <fred.konrad@greensocs.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef XLNX_DPDMA_H
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#define XLNX_DPDMA_H
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#include "hw/sysbus.h"
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#include "ui/console.h"
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#include "sysemu/dma.h"
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#define XLNX_DPDMA_REG_ARRAY_SIZE (0x1000 >> 2)
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struct XlnxDPDMAState {
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/*< private >*/
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SysBusDevice parent_obj;
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/*< public >*/
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MemoryRegion iomem;
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uint32_t registers[XLNX_DPDMA_REG_ARRAY_SIZE];
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uint8_t *data[6];
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bool operation_finished[6];
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qemu_irq irq;
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};
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typedef struct XlnxDPDMAState XlnxDPDMAState;
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#define TYPE_XLNX_DPDMA "xlnx.dpdma"
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#define XLNX_DPDMA(obj) OBJECT_CHECK(XlnxDPDMAState, (obj), TYPE_XLNX_DPDMA)
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/*
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* xlnx_dpdma_start_operation: Start the operation on the specified channel. The
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* DPDMA gets the current descriptor and retrieves
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* data to the buffer specified by
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* dpdma_set_host_data_location().
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*
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* Returns The number of bytes transferred by the DPDMA
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* or 0 if an error occurred.
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*
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* @s The DPDMA state.
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* @channel The channel to start.
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*/
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size_t xlnx_dpdma_start_operation(XlnxDPDMAState *s, uint8_t channel,
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bool one_desc);
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/*
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* xlnx_dpdma_set_host_data_location: Set the location in the host memory where
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* to store the data out from the dma
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* channel.
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*
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* @s The DPDMA state.
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* @channel The channel associated to the pointer.
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* @p The buffer where to store the data.
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*/
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/* XXX: add a maximum size arg and send an interrupt in case of overflow. */
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void xlnx_dpdma_set_host_data_location(XlnxDPDMAState *s, uint8_t channel,
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void *p);
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/*
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* xlnx_dpdma_trigger_vsync_irq: Trigger a VSYNC IRQ when the display is
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* updated.
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*
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* @s The DPDMA state.
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*/
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void xlnx_dpdma_trigger_vsync_irq(XlnxDPDMAState *s);
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#endif /* XLNX_DPDMA_H */
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