hw: move DMA controllers to hw/dma/, configure with default-configs/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 781 deletions

diff --git a/hw/etraxfs_dma.c b/hw/etraxfs_dma.c
deleted file mode 100644
index 6a8c222502..0000000000
--- a/hw/etraxfs_dma.c
+++ /dev/null
@@ -1,781 +0,0 @@
-/*
- * QEMU ETRAX DMA Controller.
- *
- * Copyright (c) 2008 Edgar E. Iglesias, Axis Communications AB.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#include <stdio.h>
-#include <sys/time.h>
-#include "hw/hw.h"
-#include "exec/address-spaces.h"
-#include "qemu-common.h"
-#include "sysemu/sysemu.h"
-
-#include "hw/cris/etraxfs_dma.h"
-
-#define D(x)
-
-#define RW_DATA           (0x0 / 4)
-#define RW_SAVED_DATA     (0x58 / 4)
-#define RW_SAVED_DATA_BUF (0x5c / 4)
-#define RW_GROUP          (0x60 / 4)
-#define RW_GROUP_DOWN     (0x7c / 4)
-#define RW_CMD            (0x80 / 4)
-#define RW_CFG            (0x84 / 4)
-#define RW_STAT           (0x88 / 4)
-#define RW_INTR_MASK      (0x8c / 4)
-#define RW_ACK_INTR       (0x90 / 4)
-#define R_INTR            (0x94 / 4)
-#define R_MASKED_INTR     (0x98 / 4)
-#define RW_STREAM_CMD     (0x9c / 4)
-
-#define DMA_REG_MAX       (0x100 / 4)
-
-/* descriptors */
-
-// ------------------------------------------------------------ dma_descr_group
-typedef struct dma_descr_group {
-  uint32_t                      next;
-  unsigned                      eol        : 1;
-  unsigned                      tol        : 1;
-  unsigned                      bol        : 1;
-  unsigned                                 : 1;
-  unsigned                      intr       : 1;
-  unsigned                                 : 2;
-  unsigned                      en         : 1;
-  unsigned                                 : 7;
-  unsigned                      dis        : 1;
-  unsigned                      md         : 16;
-  struct dma_descr_group       *up;
-  union {
-    struct dma_descr_context   *context;
-    struct dma_descr_group     *group;
-  }                             down;
-} dma_descr_group;
-
-// ---------------------------------------------------------- dma_descr_context
-typedef struct dma_descr_context {
-  uint32_t                      next;
-  unsigned                      eol        : 1;
-  unsigned                                 : 3;
-  unsigned                      intr       : 1;
-  unsigned                                 : 1;
-  unsigned                      store_mode : 1;
-  unsigned                      en         : 1;
-  unsigned                                 : 7;
-  unsigned                      dis        : 1;
-  unsigned                      md0        : 16;
-  unsigned                      md1;
-  unsigned                      md2;
-  unsigned                      md3;
-  unsigned                      md4;
-  uint32_t                      saved_data;
-  uint32_t                      saved_data_buf;
-} dma_descr_context;
-
-// ------------------------------------------------------------- dma_descr_data
-typedef struct dma_descr_data {
-  uint32_t                      next;
-  uint32_t                      buf;
-  unsigned                      eol        : 1;
-  unsigned                                 : 2;
-  unsigned                      out_eop    : 1;
-  unsigned                      intr       : 1;
-  unsigned                      wait       : 1;
-  unsigned                                 : 2;
-  unsigned                                 : 3;
-  unsigned                      in_eop     : 1;
-  unsigned                                 : 4;
-  unsigned                      md         : 16;
-  uint32_t                      after;
-} dma_descr_data;
-
-/* Constants */
-enum {
-  regk_dma_ack_pkt                         = 0x00000100,
-  regk_dma_anytime                         = 0x00000001,
-  regk_dma_array                           = 0x00000008,
-  regk_dma_burst                           = 0x00000020,
-  regk_dma_client                          = 0x00000002,
-  regk_dma_copy_next                       = 0x00000010,
-  regk_dma_copy_up                         = 0x00000020,
-  regk_dma_data_at_eol                     = 0x00000001,
-  regk_dma_dis_c                           = 0x00000010,
-  regk_dma_dis_g                           = 0x00000020,
-  regk_dma_idle                            = 0x00000001,
-  regk_dma_intern                          = 0x00000004,
-  regk_dma_load_c                          = 0x00000200,
-  regk_dma_load_c_n                        = 0x00000280,
-  regk_dma_load_c_next                     = 0x00000240,
-  regk_dma_load_d                          = 0x00000140,
-  regk_dma_load_g                          = 0x00000300,
-  regk_dma_load_g_down                     = 0x000003c0,
-  regk_dma_load_g_next                     = 0x00000340,
-  regk_dma_load_g_up                       = 0x00000380,
-  regk_dma_next_en                         = 0x00000010,
-  regk_dma_next_pkt                        = 0x00000010,
-  regk_dma_no                              = 0x00000000,
-  regk_dma_only_at_wait                    = 0x00000000,
-  regk_dma_restore                         = 0x00000020,
-  regk_dma_rst                             = 0x00000001,
-  regk_dma_running                         = 0x00000004,
-  regk_dma_rw_cfg_default                  = 0x00000000,
-  regk_dma_rw_cmd_default                  = 0x00000000,
-  regk_dma_rw_intr_mask_default            = 0x00000000,
-  regk_dma_rw_stat_default                 = 0x00000101,
-  regk_dma_rw_stream_cmd_default           = 0x00000000,
-  regk_dma_save_down                       = 0x00000020,
-  regk_dma_save_up                         = 0x00000020,
-  regk_dma_set_reg                         = 0x00000050,
-  regk_dma_set_w_size1                     = 0x00000190,
-  regk_dma_set_w_size2                     = 0x000001a0,
-  regk_dma_set_w_size4                     = 0x000001c0,
-  regk_dma_stopped                         = 0x00000002,
-  regk_dma_store_c                         = 0x00000002,
-  regk_dma_store_descr                     = 0x00000000,
-  regk_dma_store_g                         = 0x00000004,
-  regk_dma_store_md                        = 0x00000001,
-  regk_dma_sw                              = 0x00000008,
-  regk_dma_update_down                     = 0x00000020,
-  regk_dma_yes                             = 0x00000001
-};
-
-enum dma_ch_state
-{
-	RST = 1,
-	STOPPED = 2,
-	RUNNING = 4
-};
-
-struct fs_dma_channel
-{
-	qemu_irq irq;
-	struct etraxfs_dma_client *client;
-
-	/* Internal status.  */
-	int stream_cmd_src;
-	enum dma_ch_state state;
-
-	unsigned int input : 1;
-	unsigned int eol : 1;
-
-	struct dma_descr_group current_g;
-	struct dma_descr_context current_c;
-	struct dma_descr_data current_d;
-
-	/* Control registers.  */
-	uint32_t regs[DMA_REG_MAX];
-};
-
-struct fs_dma_ctrl
-{
-	MemoryRegion mmio;
-	int nr_channels;
-	struct fs_dma_channel *channels;
-
-        QEMUBH *bh;
-};
-
-static void DMA_run(void *opaque);
-static int channel_out_run(struct fs_dma_ctrl *ctrl, int c);
-
-static inline uint32_t channel_reg(struct fs_dma_ctrl *ctrl, int c, int reg)
-{
-	return ctrl->channels[c].regs[reg];
-}
-
-static inline int channel_stopped(struct fs_dma_ctrl *ctrl, int c)
-{
-	return channel_reg(ctrl, c, RW_CFG) & 2;
-}
-
-static inline int channel_en(struct fs_dma_ctrl *ctrl, int c)
-{
-	return (channel_reg(ctrl, c, RW_CFG) & 1)
-		&& ctrl->channels[c].client;
-}
-
-static inline int fs_channel(hwaddr addr)
-{
-	/* Every channel has a 0x2000 ctrl register map.  */
-	return addr >> 13;
-}
-
-#ifdef USE_THIS_DEAD_CODE
-static void channel_load_g(struct fs_dma_ctrl *ctrl, int c)
-{
-	hwaddr addr = channel_reg(ctrl, c, RW_GROUP);
-
-	/* Load and decode. FIXME: handle endianness.  */
-	cpu_physical_memory_read (addr, 
-				  (void *) &ctrl->channels[c].current_g, 
-				  sizeof ctrl->channels[c].current_g);
-}
-
-static void dump_c(int ch, struct dma_descr_context *c)
-{
-	printf("%s ch=%d\n", __func__, ch);
-	printf("next=%x\n", c->next);
-	printf("saved_data=%x\n", c->saved_data);
-	printf("saved_data_buf=%x\n", c->saved_data_buf);
-	printf("eol=%x\n", (uint32_t) c->eol);
-}
-
-static void dump_d(int ch, struct dma_descr_data *d)
-{
-	printf("%s ch=%d\n", __func__, ch);
-	printf("next=%x\n", d->next);
-	printf("buf=%x\n", d->buf);
-	printf("after=%x\n", d->after);
-	printf("intr=%x\n", (uint32_t) d->intr);
-	printf("out_eop=%x\n", (uint32_t) d->out_eop);
-	printf("in_eop=%x\n", (uint32_t) d->in_eop);
-	printf("eol=%x\n", (uint32_t) d->eol);
-}
-#endif
-
-static void channel_load_c(struct fs_dma_ctrl *ctrl, int c)
-{
-	hwaddr addr = channel_reg(ctrl, c, RW_GROUP_DOWN);
-
-	/* Load and decode. FIXME: handle endianness.  */
-	cpu_physical_memory_read (addr, 
-				  (void *) &ctrl->channels[c].current_c, 
-				  sizeof ctrl->channels[c].current_c);
-
-	D(dump_c(c, &ctrl->channels[c].current_c));
-	/* I guess this should update the current pos.  */
-	ctrl->channels[c].regs[RW_SAVED_DATA] =
-		(uint32_t)(unsigned long)ctrl->channels[c].current_c.saved_data;
-	ctrl->channels[c].regs[RW_SAVED_DATA_BUF] =
-		(uint32_t)(unsigned long)ctrl->channels[c].current_c.saved_data_buf;
-}
-
-static void channel_load_d(struct fs_dma_ctrl *ctrl, int c)
-{
-	hwaddr addr = channel_reg(ctrl, c, RW_SAVED_DATA);
-
-	/* Load and decode. FIXME: handle endianness.  */
-	D(printf("%s ch=%d addr=" TARGET_FMT_plx "\n", __func__, c, addr));
-	cpu_physical_memory_read (addr,
-				  (void *) &ctrl->channels[c].current_d, 
-				  sizeof ctrl->channels[c].current_d);
-
-	D(dump_d(c, &ctrl->channels[c].current_d));
-	ctrl->channels[c].regs[RW_DATA] = addr;
-}
-
-static void channel_store_c(struct fs_dma_ctrl *ctrl, int c)
-{
-	hwaddr addr = channel_reg(ctrl, c, RW_GROUP_DOWN);
-
-	/* Encode and store. FIXME: handle endianness.  */
-	D(printf("%s ch=%d addr=" TARGET_FMT_plx "\n", __func__, c, addr));
-	D(dump_d(c, &ctrl->channels[c].current_d));
-	cpu_physical_memory_write (addr,
-				  (void *) &ctrl->channels[c].current_c,
-				  sizeof ctrl->channels[c].current_c);
-}
-
-static void channel_store_d(struct fs_dma_ctrl *ctrl, int c)
-{
-	hwaddr addr = channel_reg(ctrl, c, RW_SAVED_DATA);
-
-	/* Encode and store. FIXME: handle endianness.  */
-	D(printf("%s ch=%d addr=" TARGET_FMT_plx "\n", __func__, c, addr));
-	cpu_physical_memory_write (addr,
-				  (void *) &ctrl->channels[c].current_d, 
-				  sizeof ctrl->channels[c].current_d);
-}
-
-static inline void channel_stop(struct fs_dma_ctrl *ctrl, int c)
-{
-	/* FIXME:  */
-}
-
-static inline void channel_start(struct fs_dma_ctrl *ctrl, int c)
-{
-	if (ctrl->channels[c].client)
-	{
-		ctrl->channels[c].eol = 0;
-		ctrl->channels[c].state = RUNNING;
-		if (!ctrl->channels[c].input)
-			channel_out_run(ctrl, c);
-	} else
-		printf("WARNING: starting DMA ch %d with no client\n", c);
-
-        qemu_bh_schedule_idle(ctrl->bh);
-}
-
-static void channel_continue(struct fs_dma_ctrl *ctrl, int c)
-{
-	if (!channel_en(ctrl, c) 
-	    || channel_stopped(ctrl, c)
-	    || ctrl->channels[c].state != RUNNING
-	    /* Only reload the current data descriptor if it has eol set.  */
-	    || !ctrl->channels[c].current_d.eol) {
-		D(printf("continue failed ch=%d state=%d stopped=%d en=%d eol=%d\n", 
-			 c, ctrl->channels[c].state,
-			 channel_stopped(ctrl, c),
-			 channel_en(ctrl,c),
-			 ctrl->channels[c].eol));
-		D(dump_d(c, &ctrl->channels[c].current_d));
-		return;
-	}
-
-	/* Reload the current descriptor.  */
-	channel_load_d(ctrl, c);
-
-	/* If the current descriptor cleared the eol flag and we had already
-	   reached eol state, do the continue.  */
-	if (!ctrl->channels[c].current_d.eol && ctrl->channels[c].eol) {
-		D(printf("continue %d ok %x\n", c,
-			 ctrl->channels[c].current_d.next));
-		ctrl->channels[c].regs[RW_SAVED_DATA] =
-			(uint32_t)(unsigned long)ctrl->channels[c].current_d.next;
-		channel_load_d(ctrl, c);
-		ctrl->channels[c].regs[RW_SAVED_DATA_BUF] =
-			(uint32_t)(unsigned long)ctrl->channels[c].current_d.buf;
-
-		channel_start(ctrl, c);
-	}
-	ctrl->channels[c].regs[RW_SAVED_DATA_BUF] =
-		(uint32_t)(unsigned long)ctrl->channels[c].current_d.buf;
-}
-
-static void channel_stream_cmd(struct fs_dma_ctrl *ctrl, int c, uint32_t v)
-{
-	unsigned int cmd = v & ((1 << 10) - 1);
-
-	D(printf("%s ch=%d cmd=%x\n",
-		 __func__, c, cmd));
-	if (cmd & regk_dma_load_d) {
-		channel_load_d(ctrl, c);
-		if (cmd & regk_dma_burst)
-			channel_start(ctrl, c);
-	}
-
-	if (cmd & regk_dma_load_c) {
-		channel_load_c(ctrl, c);
-	}
-}
-
-static void channel_update_irq(struct fs_dma_ctrl *ctrl, int c)
-{
-	D(printf("%s %d\n", __func__, c));
-        ctrl->channels[c].regs[R_INTR] &=
-		~(ctrl->channels[c].regs[RW_ACK_INTR]);
-
-        ctrl->channels[c].regs[R_MASKED_INTR] =
-		ctrl->channels[c].regs[R_INTR]
-		& ctrl->channels[c].regs[RW_INTR_MASK];
-
-	D(printf("%s: chan=%d masked_intr=%x\n", __func__, 
-		 c,
-		 ctrl->channels[c].regs[R_MASKED_INTR]));
-
-        qemu_set_irq(ctrl->channels[c].irq,
-		     !!ctrl->channels[c].regs[R_MASKED_INTR]);
-}
-
-static int channel_out_run(struct fs_dma_ctrl *ctrl, int c)
-{
-	uint32_t len;
-	uint32_t saved_data_buf;
-	unsigned char buf[2 * 1024];
-
-	struct dma_context_metadata meta;
-	bool send_context = true;
-
-	if (ctrl->channels[c].eol)
-		return 0;
-
-	do {
-		bool out_eop;
-		D(printf("ch=%d buf=%x after=%x\n",
-			 c,
-			 (uint32_t)ctrl->channels[c].current_d.buf,
-			 (uint32_t)ctrl->channels[c].current_d.after));
-
-		if (send_context) {
-			if (ctrl->channels[c].client->client.metadata_push) {
-				meta.metadata = ctrl->channels[c].current_d.md;
-				ctrl->channels[c].client->client.metadata_push(
-					ctrl->channels[c].client->client.opaque,
-					&meta);
-			}
-			send_context = false;
-		}
-
-		channel_load_d(ctrl, c);
-		saved_data_buf = channel_reg(ctrl, c, RW_SAVED_DATA_BUF);
-		len = (uint32_t)(unsigned long)
-			ctrl->channels[c].current_d.after;
-		len -= saved_data_buf;
-
-		if (len > sizeof buf)
-			len = sizeof buf;
-		cpu_physical_memory_read (saved_data_buf, buf, len);
-
-		out_eop = ((saved_data_buf + len) ==
-		           ctrl->channels[c].current_d.after) &&
-			ctrl->channels[c].current_d.out_eop;
-
-		D(printf("channel %d pushes %x %u bytes eop=%u\n", c,
-		         saved_data_buf, len, out_eop));
-
-		if (ctrl->channels[c].client->client.push)
-			ctrl->channels[c].client->client.push(
-				ctrl->channels[c].client->client.opaque,
-				buf, len, out_eop);
-		else
-			printf("WARNING: DMA ch%d dataloss,"
-			       " no attached client.\n", c);
-
-		saved_data_buf += len;
-
-		if (saved_data_buf == (uint32_t)(unsigned long)
-				ctrl->channels[c].current_d.after) {
-			/* Done. Step to next.  */
-			if (ctrl->channels[c].current_d.out_eop) {
-				send_context = true;
-			}
-			if (ctrl->channels[c].current_d.intr) {
-				/* data intr.  */
-				D(printf("signal intr %d eol=%d\n",
-					len, ctrl->channels[c].current_d.eol));
-				ctrl->channels[c].regs[R_INTR] |= (1 << 2);
-				channel_update_irq(ctrl, c);
-			}
-			channel_store_d(ctrl, c);
-			if (ctrl->channels[c].current_d.eol) {
-				D(printf("channel %d EOL\n", c));
-				ctrl->channels[c].eol = 1;
-
-				/* Mark the context as disabled.  */
-				ctrl->channels[c].current_c.dis = 1;
-				channel_store_c(ctrl, c);
-
-				channel_stop(ctrl, c);
-			} else {
-				ctrl->channels[c].regs[RW_SAVED_DATA] =
-					(uint32_t)(unsigned long)ctrl->
-						channels[c].current_d.next;
-				/* Load new descriptor.  */
-				channel_load_d(ctrl, c);
-				saved_data_buf = (uint32_t)(unsigned long)
-					ctrl->channels[c].current_d.buf;
-			}
-
-			ctrl->channels[c].regs[RW_SAVED_DATA_BUF] =
-							saved_data_buf;
-			D(dump_d(c, &ctrl->channels[c].current_d));
-		}
-		ctrl->channels[c].regs[RW_SAVED_DATA_BUF] = saved_data_buf;
-	} while (!ctrl->channels[c].eol);
-	return 1;
-}
-
-static int channel_in_process(struct fs_dma_ctrl *ctrl, int c, 
-			      unsigned char *buf, int buflen, int eop)
-{
-	uint32_t len;
-	uint32_t saved_data_buf;
-
-	if (ctrl->channels[c].eol == 1)
-		return 0;
-
-	channel_load_d(ctrl, c);
-	saved_data_buf = channel_reg(ctrl, c, RW_SAVED_DATA_BUF);
-	len = (uint32_t)(unsigned long)ctrl->channels[c].current_d.after;
-	len -= saved_data_buf;
-	
-	if (len > buflen)
-		len = buflen;
-
-	cpu_physical_memory_write (saved_data_buf, buf, len);
-	saved_data_buf += len;
-
-	if (saved_data_buf ==
-	    (uint32_t)(unsigned long)ctrl->channels[c].current_d.after
-	    || eop) {
-		uint32_t r_intr = ctrl->channels[c].regs[R_INTR];
-
-		D(printf("in dscr end len=%d\n", 
-			 ctrl->channels[c].current_d.after
-			 - ctrl->channels[c].current_d.buf));
-		ctrl->channels[c].current_d.after = saved_data_buf;
-
-		/* Done. Step to next.  */
-		if (ctrl->channels[c].current_d.intr) {
-			/* TODO: signal eop to the client.  */
-			/* data intr.  */
-			ctrl->channels[c].regs[R_INTR] |= 3;
-		}
-		if (eop) {
-			ctrl->channels[c].current_d.in_eop = 1;
-			ctrl->channels[c].regs[R_INTR] |= 8;
-		}
-		if (r_intr != ctrl->channels[c].regs[R_INTR])
-			channel_update_irq(ctrl, c);
-
-		channel_store_d(ctrl, c);
-		D(dump_d(c, &ctrl->channels[c].current_d));
-
-		if (ctrl->channels[c].current_d.eol) {
-			D(printf("channel %d EOL\n", c));
-			ctrl->channels[c].eol = 1;
-
-			/* Mark the context as disabled.  */
-			ctrl->channels[c].current_c.dis = 1;
-			channel_store_c(ctrl, c);
-
-			channel_stop(ctrl, c);
-		} else {
-			ctrl->channels[c].regs[RW_SAVED_DATA] =
-				(uint32_t)(unsigned long)ctrl->
-					channels[c].current_d.next;
-			/* Load new descriptor.  */
-			channel_load_d(ctrl, c);
-			saved_data_buf = (uint32_t)(unsigned long)
-				ctrl->channels[c].current_d.buf;
-		}
-	}
-
-	ctrl->channels[c].regs[RW_SAVED_DATA_BUF] = saved_data_buf;
-	return len;
-}
-
-static inline int channel_in_run(struct fs_dma_ctrl *ctrl, int c)
-{
-	if (ctrl->channels[c].client->client.pull) {
-		ctrl->channels[c].client->client.pull(
-			ctrl->channels[c].client->client.opaque);
-		return 1;
-	} else
-		return 0;
-}
-
-static uint32_t dma_rinvalid (void *opaque, hwaddr addr)
-{
-        hw_error("Unsupported short raccess. reg=" TARGET_FMT_plx "\n", addr);
-        return 0;
-}
-
-static uint64_t
-dma_read(void *opaque, hwaddr addr, unsigned int size)
-{
-        struct fs_dma_ctrl *ctrl = opaque;
-	int c;
-	uint32_t r = 0;
-
-	if (size != 4) {
-		dma_rinvalid(opaque, addr);
-	}
-
-	/* Make addr relative to this channel and bounded to nr regs.  */
-	c = fs_channel(addr);
-	addr &= 0xff;
-	addr >>= 2;
-	switch (addr)
-	{
-		case RW_STAT:
-			r = ctrl->channels[c].state & 7;
-			r |= ctrl->channels[c].eol << 5;
-			r |= ctrl->channels[c].stream_cmd_src << 8;
-			break;
-
-		default:
-			r = ctrl->channels[c].regs[addr];
-			D(printf ("%s c=%d addr=" TARGET_FMT_plx "\n",
-				  __func__, c, addr));
-			break;
-	}
-	return r;
-}
-
-static void
-dma_winvalid (void *opaque, hwaddr addr, uint32_t value)
-{
-        hw_error("Unsupported short waccess. reg=" TARGET_FMT_plx "\n", addr);
-}
-
-static void
-dma_update_state(struct fs_dma_ctrl *ctrl, int c)
-{
-	if (ctrl->channels[c].regs[RW_CFG] & 2)
-		ctrl->channels[c].state = STOPPED;
-	if (!(ctrl->channels[c].regs[RW_CFG] & 1))
-		ctrl->channels[c].state = RST;
-}
-
-static void
-dma_write(void *opaque, hwaddr addr,
-	  uint64_t val64, unsigned int size)
-{
-        struct fs_dma_ctrl *ctrl = opaque;
-	uint32_t value = val64;
-	int c;
-
-	if (size != 4) {
-		dma_winvalid(opaque, addr, value);
-	}
-
-        /* Make addr relative to this channel and bounded to nr regs.  */
-	c = fs_channel(addr);
-        addr &= 0xff;
-        addr >>= 2;
-        switch (addr)
-	{
-		case RW_DATA:
-			ctrl->channels[c].regs[addr] = value;
-			break;
-
-		case RW_CFG:
-			ctrl->channels[c].regs[addr] = value;
-			dma_update_state(ctrl, c);
-			break;
-		case RW_CMD:
-			/* continue.  */
-			if (value & ~1)
-				printf("Invalid store to ch=%d RW_CMD %x\n",
-				       c, value);
-			ctrl->channels[c].regs[addr] = value;
-			channel_continue(ctrl, c);
-			break;
-
-		case RW_SAVED_DATA:
-		case RW_SAVED_DATA_BUF:
-		case RW_GROUP:
-		case RW_GROUP_DOWN:
-			ctrl->channels[c].regs[addr] = value;
-			break;
-
-		case RW_ACK_INTR:
-		case RW_INTR_MASK:
-			ctrl->channels[c].regs[addr] = value;
-			channel_update_irq(ctrl, c);
-			if (addr == RW_ACK_INTR)
-				ctrl->channels[c].regs[RW_ACK_INTR] = 0;
-			break;
-
-		case RW_STREAM_CMD:
-			if (value & ~1023)
-				printf("Invalid store to ch=%d "
-				       "RW_STREAMCMD %x\n",
-				       c, value);
-			ctrl->channels[c].regs[addr] = value;
-			D(printf("stream_cmd ch=%d\n", c));
-			channel_stream_cmd(ctrl, c, value);
-			break;
-
-	        default:
-			D(printf ("%s c=%d " TARGET_FMT_plx "\n",
-				__func__, c, addr));
-			break;
-        }
-}
-
-static const MemoryRegionOps dma_ops = {
-	.read = dma_read,
-	.write = dma_write,
-	.endianness = DEVICE_NATIVE_ENDIAN,
-	.valid = {
-		.min_access_size = 1,
-		.max_access_size = 4
-	}
-};
-
-static int etraxfs_dmac_run(void *opaque)
-{
-	struct fs_dma_ctrl *ctrl = opaque;
-	int i;
-	int p = 0;
-
-	for (i = 0; 
-	     i < ctrl->nr_channels;
-	     i++)
-	{
-		if (ctrl->channels[i].state == RUNNING)
-		{
-			if (ctrl->channels[i].input) {
-				p += channel_in_run(ctrl, i);
-			} else {
-				p += channel_out_run(ctrl, i);
-			}
-		}
-	}
-	return p;
-}
-
-int etraxfs_dmac_input(struct etraxfs_dma_client *client, 
-		       void *buf, int len, int eop)
-{
-	return channel_in_process(client->ctrl, client->channel, 
-				  buf, len, eop);
-}
-
-/* Connect an IRQ line with a channel.  */
-void etraxfs_dmac_connect(void *opaque, int c, qemu_irq *line, int input)
-{
-	struct fs_dma_ctrl *ctrl = opaque;
-	ctrl->channels[c].irq = *line;
-	ctrl->channels[c].input = input;
-}
-
-void etraxfs_dmac_connect_client(void *opaque, int c, 
-				 struct etraxfs_dma_client *cl)
-{
-	struct fs_dma_ctrl *ctrl = opaque;
-	cl->ctrl = ctrl;
-	cl->channel = c;
-	ctrl->channels[c].client = cl;
-}
-
-
-static void DMA_run(void *opaque)
-{
-    struct fs_dma_ctrl *etraxfs_dmac = opaque;
-    int p = 1;
-
-    if (runstate_is_running())
-        p = etraxfs_dmac_run(etraxfs_dmac);
-
-    if (p)
-        qemu_bh_schedule_idle(etraxfs_dmac->bh);
-}
-
-void *etraxfs_dmac_init(hwaddr base, int nr_channels)
-{
-	struct fs_dma_ctrl *ctrl = NULL;
-
-	ctrl = g_malloc0(sizeof *ctrl);
-
-        ctrl->bh = qemu_bh_new(DMA_run, ctrl);
-
-	ctrl->nr_channels = nr_channels;
-	ctrl->channels = g_malloc0(sizeof ctrl->channels[0] * nr_channels);
-
-	memory_region_init_io(&ctrl->mmio, &dma_ops, ctrl, "etraxfs-dma",
-			      nr_channels * 0x2000);
-	memory_region_add_subregion(get_system_memory(), base, &ctrl->mmio);
-
-	return ctrl;
-}