diff options
Diffstat (limited to 'qemu/hw/dma/etraxfs_dma.c')
| -rw-r--r-- | qemu/hw/dma/etraxfs_dma.c | 783 |
1 files changed, 0 insertions, 783 deletions
diff --git a/qemu/hw/dma/etraxfs_dma.c b/qemu/hw/dma/etraxfs_dma.c deleted file mode 100644 index d5650eb88..000000000 --- a/qemu/hw/dma/etraxfs_dma.c +++ /dev/null @@ -1,783 +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 "qemu/osdep.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) { - if (len > 0) { - 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, NULL, &dma_ops, ctrl, "etraxfs-dma", - nr_channels * 0x2000); - memory_region_add_subregion(get_system_memory(), base, &ctrl->mmio); - - return ctrl; -} |