From d3c6369a96a8741523a617295306665773ca02e5 Mon Sep 17 00:00:00 2001 From: KONRAD Frederic Date: Tue, 14 Jun 2016 15:59:15 +0100 Subject: introduce xlnx-dpdma This is the implementation of the DPDMA. Signed-off-by: KONRAD Frederic Reviewed-by: Alistair Francis Tested-By: Hyun Kwon Message-id: 1465833014-21982-8-git-send-email-fred.konrad@greensocs.com Signed-off-by: Peter Maydell --- include/hw/dma/xlnx_dpdma.h | 85 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 include/hw/dma/xlnx_dpdma.h (limited to 'include/hw/dma') diff --git a/include/hw/dma/xlnx_dpdma.h b/include/hw/dma/xlnx_dpdma.h new file mode 100644 index 0000000..ae571a0 --- /dev/null +++ b/include/hw/dma/xlnx_dpdma.h @@ -0,0 +1,85 @@ +/* + * xlnx_dpdma.h + * + * Copyright (C) 2015 : GreenSocs Ltd + * http://www.greensocs.com/ , email: info@greensocs.com + * + * Developed by : + * Frederic Konrad + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see . + * + */ + +#ifndef XLNX_DPDMA_H +#define XLNX_DPDMA_H + +#include "hw/sysbus.h" +#include "ui/console.h" +#include "sysemu/dma.h" + +#define XLNX_DPDMA_REG_ARRAY_SIZE (0x1000 >> 2) + +struct XlnxDPDMAState { + /*< private >*/ + SysBusDevice parent_obj; + /*< public >*/ + MemoryRegion iomem; + uint32_t registers[XLNX_DPDMA_REG_ARRAY_SIZE]; + uint8_t *data[6]; + bool operation_finished[6]; + qemu_irq irq; +}; + +typedef struct XlnxDPDMAState XlnxDPDMAState; + +#define TYPE_XLNX_DPDMA "xlnx.dpdma" +#define XLNX_DPDMA(obj) OBJECT_CHECK(XlnxDPDMAState, (obj), TYPE_XLNX_DPDMA) + +/* + * xlnx_dpdma_start_operation: Start the operation on the specified channel. The + * DPDMA gets the current descriptor and retrieves + * data to the buffer specified by + * dpdma_set_host_data_location(). + * + * Returns The number of bytes transfered by the DPDMA or 0 if an error occured. + * + * @s The DPDMA state. + * @channel The channel to start. + */ +size_t xlnx_dpdma_start_operation(XlnxDPDMAState *s, uint8_t channel, + bool one_desc); + +/* + * xlnx_dpdma_set_host_data_location: Set the location in the host memory where + * to store the data out from the dma + * channel. + * + * @s The DPDMA state. + * @channel The channel associated to the pointer. + * @p The buffer where to store the data. + */ +/* XXX: add a maximum size arg and send an interrupt in case of overflow. */ +void xlnx_dpdma_set_host_data_location(XlnxDPDMAState *s, uint8_t channel, + void *p); + +/* + * xlnx_dpdma_trigger_vsync_irq: Trigger a VSYNC IRQ when the display is + * updated. + * + * @s The DPDMA state. + */ +void xlnx_dpdma_trigger_vsync_irq(XlnxDPDMAState *s); + +#endif /* !XLNX_DPDMA_H */ -- cgit v1.1