diff options
Diffstat (limited to 'qemu/hw/misc/macio/mac_dbdma.c')
| -rw-r--r-- | qemu/hw/misc/macio/mac_dbdma.c | 820 |
1 files changed, 0 insertions, 820 deletions
diff --git a/qemu/hw/misc/macio/mac_dbdma.c b/qemu/hw/misc/macio/mac_dbdma.c deleted file mode 100644 index 6051f17db..000000000 --- a/qemu/hw/misc/macio/mac_dbdma.c +++ /dev/null @@ -1,820 +0,0 @@ -/* - * PowerMac descriptor-based DMA emulation - * - * Copyright (c) 2005-2007 Fabrice Bellard - * Copyright (c) 2007 Jocelyn Mayer - * Copyright (c) 2009 Laurent Vivier - * - * some parts from linux-2.6.28, arch/powerpc/include/asm/dbdma.h - * - * Definitions for using the Apple Descriptor-Based DMA controller - * in Power Macintosh computers. - * - * Copyright (C) 1996 Paul Mackerras. - * - * some parts from mol 0.9.71 - * - * Descriptor based DMA emulation - * - * Copyright (C) 1998-2004 Samuel Rydh (samuel@ibrium.se) - * - * 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 "hw/isa/isa.h" -#include "hw/ppc/mac_dbdma.h" -#include "qemu/main-loop.h" - -/* debug DBDMA */ -//#define DEBUG_DBDMA - -#ifdef DEBUG_DBDMA -#define DBDMA_DPRINTF(fmt, ...) \ - do { printf("DBDMA: " fmt , ## __VA_ARGS__); } while (0) -#else -#define DBDMA_DPRINTF(fmt, ...) -#endif - -/* - */ - -static DBDMAState *dbdma_from_ch(DBDMA_channel *ch) -{ - return container_of(ch, DBDMAState, channels[ch->channel]); -} - -#ifdef DEBUG_DBDMA -static void dump_dbdma_cmd(dbdma_cmd *cmd) -{ - printf("dbdma_cmd %p\n", cmd); - printf(" req_count 0x%04x\n", le16_to_cpu(cmd->req_count)); - printf(" command 0x%04x\n", le16_to_cpu(cmd->command)); - printf(" phy_addr 0x%08x\n", le32_to_cpu(cmd->phy_addr)); - printf(" cmd_dep 0x%08x\n", le32_to_cpu(cmd->cmd_dep)); - printf(" res_count 0x%04x\n", le16_to_cpu(cmd->res_count)); - printf(" xfer_status 0x%04x\n", le16_to_cpu(cmd->xfer_status)); -} -#else -static void dump_dbdma_cmd(dbdma_cmd *cmd) -{ -} -#endif -static void dbdma_cmdptr_load(DBDMA_channel *ch) -{ - DBDMA_DPRINTF("dbdma_cmdptr_load 0x%08x\n", - ch->regs[DBDMA_CMDPTR_LO]); - cpu_physical_memory_read(ch->regs[DBDMA_CMDPTR_LO], - &ch->current, sizeof(dbdma_cmd)); -} - -static void dbdma_cmdptr_save(DBDMA_channel *ch) -{ - DBDMA_DPRINTF("dbdma_cmdptr_save 0x%08x\n", - ch->regs[DBDMA_CMDPTR_LO]); - DBDMA_DPRINTF("xfer_status 0x%08x res_count 0x%04x\n", - le16_to_cpu(ch->current.xfer_status), - le16_to_cpu(ch->current.res_count)); - cpu_physical_memory_write(ch->regs[DBDMA_CMDPTR_LO], - &ch->current, sizeof(dbdma_cmd)); -} - -static void kill_channel(DBDMA_channel *ch) -{ - DBDMA_DPRINTF("kill_channel\n"); - - ch->regs[DBDMA_STATUS] |= DEAD; - ch->regs[DBDMA_STATUS] &= ~ACTIVE; - - qemu_irq_raise(ch->irq); -} - -static void conditional_interrupt(DBDMA_channel *ch) -{ - dbdma_cmd *current = &ch->current; - uint16_t intr; - uint16_t sel_mask, sel_value; - uint32_t status; - int cond; - - DBDMA_DPRINTF("%s\n", __func__); - - intr = le16_to_cpu(current->command) & INTR_MASK; - - switch(intr) { - case INTR_NEVER: /* don't interrupt */ - return; - case INTR_ALWAYS: /* always interrupt */ - qemu_irq_raise(ch->irq); - DBDMA_DPRINTF("%s: raise\n", __func__); - return; - } - - status = ch->regs[DBDMA_STATUS] & DEVSTAT; - - sel_mask = (ch->regs[DBDMA_INTR_SEL] >> 16) & 0x0f; - sel_value = ch->regs[DBDMA_INTR_SEL] & 0x0f; - - cond = (status & sel_mask) == (sel_value & sel_mask); - - switch(intr) { - case INTR_IFSET: /* intr if condition bit is 1 */ - if (cond) { - qemu_irq_raise(ch->irq); - DBDMA_DPRINTF("%s: raise\n", __func__); - } - return; - case INTR_IFCLR: /* intr if condition bit is 0 */ - if (!cond) { - qemu_irq_raise(ch->irq); - DBDMA_DPRINTF("%s: raise\n", __func__); - } - return; - } -} - -static int conditional_wait(DBDMA_channel *ch) -{ - dbdma_cmd *current = &ch->current; - uint16_t wait; - uint16_t sel_mask, sel_value; - uint32_t status; - int cond; - - DBDMA_DPRINTF("conditional_wait\n"); - - wait = le16_to_cpu(current->command) & WAIT_MASK; - - switch(wait) { - case WAIT_NEVER: /* don't wait */ - return 0; - case WAIT_ALWAYS: /* always wait */ - return 1; - } - - status = ch->regs[DBDMA_STATUS] & DEVSTAT; - - sel_mask = (ch->regs[DBDMA_WAIT_SEL] >> 16) & 0x0f; - sel_value = ch->regs[DBDMA_WAIT_SEL] & 0x0f; - - cond = (status & sel_mask) == (sel_value & sel_mask); - - switch(wait) { - case WAIT_IFSET: /* wait if condition bit is 1 */ - if (cond) - return 1; - return 0; - case WAIT_IFCLR: /* wait if condition bit is 0 */ - if (!cond) - return 1; - return 0; - } - return 0; -} - -static void next(DBDMA_channel *ch) -{ - uint32_t cp; - - ch->regs[DBDMA_STATUS] &= ~BT; - - cp = ch->regs[DBDMA_CMDPTR_LO]; - ch->regs[DBDMA_CMDPTR_LO] = cp + sizeof(dbdma_cmd); - dbdma_cmdptr_load(ch); -} - -static void branch(DBDMA_channel *ch) -{ - dbdma_cmd *current = &ch->current; - - ch->regs[DBDMA_CMDPTR_LO] = current->cmd_dep; - ch->regs[DBDMA_STATUS] |= BT; - dbdma_cmdptr_load(ch); -} - -static void conditional_branch(DBDMA_channel *ch) -{ - dbdma_cmd *current = &ch->current; - uint16_t br; - uint16_t sel_mask, sel_value; - uint32_t status; - int cond; - - DBDMA_DPRINTF("conditional_branch\n"); - - /* check if we must branch */ - - br = le16_to_cpu(current->command) & BR_MASK; - - switch(br) { - case BR_NEVER: /* don't branch */ - next(ch); - return; - case BR_ALWAYS: /* always branch */ - branch(ch); - return; - } - - status = ch->regs[DBDMA_STATUS] & DEVSTAT; - - sel_mask = (ch->regs[DBDMA_BRANCH_SEL] >> 16) & 0x0f; - sel_value = ch->regs[DBDMA_BRANCH_SEL] & 0x0f; - - cond = (status & sel_mask) == (sel_value & sel_mask); - - switch(br) { - case BR_IFSET: /* branch if condition bit is 1 */ - if (cond) - branch(ch); - else - next(ch); - return; - case BR_IFCLR: /* branch if condition bit is 0 */ - if (!cond) - branch(ch); - else - next(ch); - return; - } -} - -static void channel_run(DBDMA_channel *ch); - -static void dbdma_end(DBDMA_io *io) -{ - DBDMA_channel *ch = io->channel; - dbdma_cmd *current = &ch->current; - - DBDMA_DPRINTF("%s\n", __func__); - - if (conditional_wait(ch)) - goto wait; - - current->xfer_status = cpu_to_le16(ch->regs[DBDMA_STATUS]); - current->res_count = cpu_to_le16(io->len); - dbdma_cmdptr_save(ch); - if (io->is_last) - ch->regs[DBDMA_STATUS] &= ~FLUSH; - - conditional_interrupt(ch); - conditional_branch(ch); - -wait: - /* Indicate that we're ready for a new DMA round */ - ch->io.processing = false; - - if ((ch->regs[DBDMA_STATUS] & RUN) && - (ch->regs[DBDMA_STATUS] & ACTIVE)) - channel_run(ch); -} - -static void start_output(DBDMA_channel *ch, int key, uint32_t addr, - uint16_t req_count, int is_last) -{ - DBDMA_DPRINTF("start_output\n"); - - /* KEY_REGS, KEY_DEVICE and KEY_STREAM - * are not implemented in the mac-io chip - */ - - DBDMA_DPRINTF("addr 0x%x key 0x%x\n", addr, key); - if (!addr || key > KEY_STREAM3) { - kill_channel(ch); - return; - } - - ch->io.addr = addr; - ch->io.len = req_count; - ch->io.is_last = is_last; - ch->io.dma_end = dbdma_end; - ch->io.is_dma_out = 1; - ch->io.processing = true; - if (ch->rw) { - ch->rw(&ch->io); - } -} - -static void start_input(DBDMA_channel *ch, int key, uint32_t addr, - uint16_t req_count, int is_last) -{ - DBDMA_DPRINTF("start_input\n"); - - /* KEY_REGS, KEY_DEVICE and KEY_STREAM - * are not implemented in the mac-io chip - */ - - DBDMA_DPRINTF("addr 0x%x key 0x%x\n", addr, key); - if (!addr || key > KEY_STREAM3) { - kill_channel(ch); - return; - } - - ch->io.addr = addr; - ch->io.len = req_count; - ch->io.is_last = is_last; - ch->io.dma_end = dbdma_end; - ch->io.is_dma_out = 0; - ch->io.processing = true; - if (ch->rw) { - ch->rw(&ch->io); - } -} - -static void load_word(DBDMA_channel *ch, int key, uint32_t addr, - uint16_t len) -{ - dbdma_cmd *current = &ch->current; - uint32_t val; - - DBDMA_DPRINTF("load_word\n"); - - /* only implements KEY_SYSTEM */ - - if (key != KEY_SYSTEM) { - printf("DBDMA: LOAD_WORD, unimplemented key %x\n", key); - kill_channel(ch); - return; - } - - cpu_physical_memory_read(addr, &val, len); - - if (len == 2) - val = (val << 16) | (current->cmd_dep & 0x0000ffff); - else if (len == 1) - val = (val << 24) | (current->cmd_dep & 0x00ffffff); - - current->cmd_dep = val; - - if (conditional_wait(ch)) - goto wait; - - current->xfer_status = cpu_to_le16(ch->regs[DBDMA_STATUS]); - dbdma_cmdptr_save(ch); - ch->regs[DBDMA_STATUS] &= ~FLUSH; - - conditional_interrupt(ch); - next(ch); - -wait: - DBDMA_kick(dbdma_from_ch(ch)); -} - -static void store_word(DBDMA_channel *ch, int key, uint32_t addr, - uint16_t len) -{ - dbdma_cmd *current = &ch->current; - uint32_t val; - - DBDMA_DPRINTF("store_word\n"); - - /* only implements KEY_SYSTEM */ - - if (key != KEY_SYSTEM) { - printf("DBDMA: STORE_WORD, unimplemented key %x\n", key); - kill_channel(ch); - return; - } - - val = current->cmd_dep; - if (len == 2) - val >>= 16; - else if (len == 1) - val >>= 24; - - cpu_physical_memory_write(addr, &val, len); - - if (conditional_wait(ch)) - goto wait; - - current->xfer_status = cpu_to_le16(ch->regs[DBDMA_STATUS]); - dbdma_cmdptr_save(ch); - ch->regs[DBDMA_STATUS] &= ~FLUSH; - - conditional_interrupt(ch); - next(ch); - -wait: - DBDMA_kick(dbdma_from_ch(ch)); -} - -static void nop(DBDMA_channel *ch) -{ - dbdma_cmd *current = &ch->current; - - if (conditional_wait(ch)) - goto wait; - - current->xfer_status = cpu_to_le16(ch->regs[DBDMA_STATUS]); - dbdma_cmdptr_save(ch); - - conditional_interrupt(ch); - conditional_branch(ch); - -wait: - DBDMA_kick(dbdma_from_ch(ch)); -} - -static void stop(DBDMA_channel *ch) -{ - ch->regs[DBDMA_STATUS] &= ~(ACTIVE|DEAD|FLUSH); - - /* the stop command does not increment command pointer */ -} - -static void channel_run(DBDMA_channel *ch) -{ - dbdma_cmd *current = &ch->current; - uint16_t cmd, key; - uint16_t req_count; - uint32_t phy_addr; - - DBDMA_DPRINTF("channel_run\n"); - dump_dbdma_cmd(current); - - /* clear WAKE flag at command fetch */ - - ch->regs[DBDMA_STATUS] &= ~WAKE; - - cmd = le16_to_cpu(current->command) & COMMAND_MASK; - - switch (cmd) { - case DBDMA_NOP: - nop(ch); - return; - - case DBDMA_STOP: - stop(ch); - return; - } - - key = le16_to_cpu(current->command) & 0x0700; - req_count = le16_to_cpu(current->req_count); - phy_addr = le32_to_cpu(current->phy_addr); - - if (key == KEY_STREAM4) { - printf("command %x, invalid key 4\n", cmd); - kill_channel(ch); - return; - } - - switch (cmd) { - case OUTPUT_MORE: - start_output(ch, key, phy_addr, req_count, 0); - return; - - case OUTPUT_LAST: - start_output(ch, key, phy_addr, req_count, 1); - return; - - case INPUT_MORE: - start_input(ch, key, phy_addr, req_count, 0); - return; - - case INPUT_LAST: - start_input(ch, key, phy_addr, req_count, 1); - return; - } - - if (key < KEY_REGS) { - printf("command %x, invalid key %x\n", cmd, key); - key = KEY_SYSTEM; - } - - /* for LOAD_WORD and STORE_WORD, req_count is on 3 bits - * and BRANCH is invalid - */ - - req_count = req_count & 0x0007; - if (req_count & 0x4) { - req_count = 4; - phy_addr &= ~3; - } else if (req_count & 0x2) { - req_count = 2; - phy_addr &= ~1; - } else - req_count = 1; - - switch (cmd) { - case LOAD_WORD: - load_word(ch, key, phy_addr, req_count); - return; - - case STORE_WORD: - store_word(ch, key, phy_addr, req_count); - return; - } -} - -static void DBDMA_run(DBDMAState *s) -{ - int channel; - - for (channel = 0; channel < DBDMA_CHANNELS; channel++) { - DBDMA_channel *ch = &s->channels[channel]; - uint32_t status = ch->regs[DBDMA_STATUS]; - if (!ch->io.processing && (status & RUN) && (status & ACTIVE)) { - channel_run(ch); - } - } -} - -static void DBDMA_run_bh(void *opaque) -{ - DBDMAState *s = opaque; - - DBDMA_DPRINTF("DBDMA_run_bh\n"); - - DBDMA_run(s); -} - -void DBDMA_kick(DBDMAState *dbdma) -{ - qemu_bh_schedule(dbdma->bh); -} - -void DBDMA_register_channel(void *dbdma, int nchan, qemu_irq irq, - DBDMA_rw rw, DBDMA_flush flush, - void *opaque) -{ - DBDMAState *s = dbdma; - DBDMA_channel *ch = &s->channels[nchan]; - - DBDMA_DPRINTF("DBDMA_register_channel 0x%x\n", nchan); - - assert(rw); - assert(flush); - - ch->irq = irq; - ch->rw = rw; - ch->flush = flush; - ch->io.opaque = opaque; -} - -static void -dbdma_control_write(DBDMA_channel *ch) -{ - uint16_t mask, value; - uint32_t status; - - mask = (ch->regs[DBDMA_CONTROL] >> 16) & 0xffff; - value = ch->regs[DBDMA_CONTROL] & 0xffff; - - value &= (RUN | PAUSE | FLUSH | WAKE | DEVSTAT); - - status = ch->regs[DBDMA_STATUS]; - - status = (value & mask) | (status & ~mask); - - if (status & WAKE) - status |= ACTIVE; - if (status & RUN) { - status |= ACTIVE; - status &= ~DEAD; - } - if (status & PAUSE) - status &= ~ACTIVE; - if ((ch->regs[DBDMA_STATUS] & RUN) && !(status & RUN)) { - /* RUN is cleared */ - status &= ~(ACTIVE|DEAD); - } - - if ((status & FLUSH) && ch->flush) { - ch->flush(&ch->io); - status &= ~FLUSH; - } - - DBDMA_DPRINTF(" status 0x%08x\n", status); - - ch->regs[DBDMA_STATUS] = status; - - if (status & ACTIVE) { - DBDMA_kick(dbdma_from_ch(ch)); - } -} - -static void dbdma_write(void *opaque, hwaddr addr, - uint64_t value, unsigned size) -{ - int channel = addr >> DBDMA_CHANNEL_SHIFT; - DBDMAState *s = opaque; - DBDMA_channel *ch = &s->channels[channel]; - int reg = (addr - (channel << DBDMA_CHANNEL_SHIFT)) >> 2; - - DBDMA_DPRINTF("writel 0x" TARGET_FMT_plx " <= 0x%08"PRIx64"\n", - addr, value); - DBDMA_DPRINTF("channel 0x%x reg 0x%x\n", - (uint32_t)addr >> DBDMA_CHANNEL_SHIFT, reg); - - /* cmdptr cannot be modified if channel is ACTIVE */ - - if (reg == DBDMA_CMDPTR_LO && (ch->regs[DBDMA_STATUS] & ACTIVE)) { - return; - } - - ch->regs[reg] = value; - - switch(reg) { - case DBDMA_CONTROL: - dbdma_control_write(ch); - break; - case DBDMA_CMDPTR_LO: - /* 16-byte aligned */ - ch->regs[DBDMA_CMDPTR_LO] &= ~0xf; - dbdma_cmdptr_load(ch); - break; - case DBDMA_STATUS: - case DBDMA_INTR_SEL: - case DBDMA_BRANCH_SEL: - case DBDMA_WAIT_SEL: - /* nothing to do */ - break; - case DBDMA_XFER_MODE: - case DBDMA_CMDPTR_HI: - case DBDMA_DATA2PTR_HI: - case DBDMA_DATA2PTR_LO: - case DBDMA_ADDRESS_HI: - case DBDMA_BRANCH_ADDR_HI: - case DBDMA_RES1: - case DBDMA_RES2: - case DBDMA_RES3: - case DBDMA_RES4: - /* unused */ - break; - } -} - -static uint64_t dbdma_read(void *opaque, hwaddr addr, - unsigned size) -{ - uint32_t value; - int channel = addr >> DBDMA_CHANNEL_SHIFT; - DBDMAState *s = opaque; - DBDMA_channel *ch = &s->channels[channel]; - int reg = (addr - (channel << DBDMA_CHANNEL_SHIFT)) >> 2; - - value = ch->regs[reg]; - - DBDMA_DPRINTF("readl 0x" TARGET_FMT_plx " => 0x%08x\n", addr, value); - DBDMA_DPRINTF("channel 0x%x reg 0x%x\n", - (uint32_t)addr >> DBDMA_CHANNEL_SHIFT, reg); - - switch(reg) { - case DBDMA_CONTROL: - value = 0; - break; - case DBDMA_STATUS: - case DBDMA_CMDPTR_LO: - case DBDMA_INTR_SEL: - case DBDMA_BRANCH_SEL: - case DBDMA_WAIT_SEL: - /* nothing to do */ - break; - case DBDMA_XFER_MODE: - case DBDMA_CMDPTR_HI: - case DBDMA_DATA2PTR_HI: - case DBDMA_DATA2PTR_LO: - case DBDMA_ADDRESS_HI: - case DBDMA_BRANCH_ADDR_HI: - /* unused */ - value = 0; - break; - case DBDMA_RES1: - case DBDMA_RES2: - case DBDMA_RES3: - case DBDMA_RES4: - /* reserved */ - break; - } - - return value; -} - -static const MemoryRegionOps dbdma_ops = { - .read = dbdma_read, - .write = dbdma_write, - .endianness = DEVICE_LITTLE_ENDIAN, - .valid = { - .min_access_size = 4, - .max_access_size = 4, - }, -}; - -static const VMStateDescription vmstate_dbdma_io = { - .name = "dbdma_io", - .version_id = 0, - .minimum_version_id = 0, - .fields = (VMStateField[]) { - VMSTATE_UINT64(addr, struct DBDMA_io), - VMSTATE_INT32(len, struct DBDMA_io), - VMSTATE_INT32(is_last, struct DBDMA_io), - VMSTATE_INT32(is_dma_out, struct DBDMA_io), - VMSTATE_BOOL(processing, struct DBDMA_io), - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_dbdma_cmd = { - .name = "dbdma_cmd", - .version_id = 0, - .minimum_version_id = 0, - .fields = (VMStateField[]) { - VMSTATE_UINT16(req_count, dbdma_cmd), - VMSTATE_UINT16(command, dbdma_cmd), - VMSTATE_UINT32(phy_addr, dbdma_cmd), - VMSTATE_UINT32(cmd_dep, dbdma_cmd), - VMSTATE_UINT16(res_count, dbdma_cmd), - VMSTATE_UINT16(xfer_status, dbdma_cmd), - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_dbdma_channel = { - .name = "dbdma_channel", - .version_id = 1, - .minimum_version_id = 1, - .fields = (VMStateField[]) { - VMSTATE_UINT32_ARRAY(regs, struct DBDMA_channel, DBDMA_REGS), - VMSTATE_STRUCT(io, struct DBDMA_channel, 0, vmstate_dbdma_io, DBDMA_io), - VMSTATE_STRUCT(current, struct DBDMA_channel, 0, vmstate_dbdma_cmd, - dbdma_cmd), - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_dbdma = { - .name = "dbdma", - .version_id = 3, - .minimum_version_id = 3, - .fields = (VMStateField[]) { - VMSTATE_STRUCT_ARRAY(channels, DBDMAState, DBDMA_CHANNELS, 1, - vmstate_dbdma_channel, DBDMA_channel), - VMSTATE_END_OF_LIST() - } -}; - -static void dbdma_reset(void *opaque) -{ - DBDMAState *s = opaque; - int i; - - for (i = 0; i < DBDMA_CHANNELS; i++) - memset(s->channels[i].regs, 0, DBDMA_SIZE); -} - -static void dbdma_unassigned_rw(DBDMA_io *io) -{ - DBDMA_channel *ch = io->channel; - qemu_log_mask(LOG_GUEST_ERROR, "%s: use of unassigned channel %d\n", - __func__, ch->channel); -} - -static void dbdma_unassigned_flush(DBDMA_io *io) -{ - DBDMA_channel *ch = io->channel; - qemu_log_mask(LOG_GUEST_ERROR, "%s: use of unassigned channel %d\n", - __func__, ch->channel); -} - -void* DBDMA_init (MemoryRegion **dbdma_mem) -{ - DBDMAState *s; - int i; - - s = g_malloc0(sizeof(DBDMAState)); - - for (i = 0; i < DBDMA_CHANNELS; i++) { - DBDMA_io *io = &s->channels[i].io; - DBDMA_channel *ch = &s->channels[i]; - qemu_iovec_init(&io->iov, 1); - - ch->rw = dbdma_unassigned_rw; - ch->flush = dbdma_unassigned_flush; - ch->channel = i; - ch->io.channel = ch; - } - - memory_region_init_io(&s->mem, NULL, &dbdma_ops, s, "dbdma", 0x1000); - *dbdma_mem = &s->mem; - vmstate_register(NULL, -1, &vmstate_dbdma, s); - qemu_register_reset(dbdma_reset, s); - - s->bh = qemu_bh_new(DBDMA_run_bh, s); - - return s; -} |