2 * QEMU model of the Xilinx Ethernet Lite MAC.
4 * Copyright (c) 2009 Edgar E. Iglesias.
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
31 #define R_TX_LEN0 (0x07f4 / 4)
32 #define R_TX_GIE0 (0x07f8 / 4)
33 #define R_TX_CTRL0 (0x07fc / 4)
34 #define R_TX_BUF1 (0x0800 / 4)
35 #define R_TX_LEN1 (0x0ff4 / 4)
36 #define R_TX_CTRL1 (0x0ffc / 4)
38 #define R_RX_BUF0 (0x1000 / 4)
39 #define R_RX_CTRL0 (0x17fc / 4)
40 #define R_RX_BUF1 (0x1800 / 4)
41 #define R_RX_CTRL1 (0x1ffc / 4)
42 #define R_MAX (0x2000 / 4)
44 #define GIE_GIE 0x80000000
57 uint32_t c_tx_pingpong;
58 uint32_t c_rx_pingpong;
65 static inline void eth_pulse_irq(struct xlx_ethlite *s)
67 /* Only the first gie reg is active. */
68 if (s->regs[R_TX_GIE0] & GIE_GIE) {
69 qemu_irq_pulse(s->irq);
73 static uint32_t eth_readl (void *opaque, target_phys_addr_t addr)
75 struct xlx_ethlite *s = opaque;
90 D(qemu_log("%s %x=%x\n", __func__, addr * 4, r));
94 r = tswap32(s->regs[addr]);
101 eth_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
103 struct xlx_ethlite *s = opaque;
104 unsigned int base = 0;
111 if (addr == R_TX_CTRL1)
114 D(qemu_log("%s addr=%x val=%x\n", __func__, addr * 4, value));
115 if ((value & (CTRL_P | CTRL_S)) == CTRL_S) {
116 qemu_send_packet(&s->nic->nc,
117 (void *) &s->regs[base],
118 s->regs[base + R_TX_LEN0]);
119 D(qemu_log("eth_tx %d\n", s->regs[base + R_TX_LEN0]));
120 if (s->regs[base + R_TX_CTRL0] & CTRL_I)
122 } else if ((value & (CTRL_P | CTRL_S)) == (CTRL_P | CTRL_S)) {
123 memcpy(&s->conf.macaddr.a[0], &s->regs[base], 6);
124 if (s->regs[base + R_TX_CTRL0] & CTRL_I)
128 /* We are fast and get ready pretty much immediately so
129 we actually never flip the S nor P bits to one. */
130 s->regs[addr] = value & ~(CTRL_P | CTRL_S);
133 /* Keep these native. */
139 D(qemu_log("%s addr=%x val=%x\n", __func__, addr * 4, value));
140 s->regs[addr] = value;
144 s->regs[addr] = tswap32(value);
149 static CPUReadMemoryFunc * const eth_read[] = {
150 NULL, NULL, ð_readl,
153 static CPUWriteMemoryFunc * const eth_write[] = {
154 NULL, NULL, ð_writel,
157 static int eth_can_rx(VLANClientState *nc)
159 struct xlx_ethlite *s = DO_UPCAST(NICState, nc, nc)->opaque;
161 r = !(s->regs[R_RX_CTRL0] & CTRL_S);
165 static ssize_t eth_rx(VLANClientState *nc, const uint8_t *buf, size_t size)
167 struct xlx_ethlite *s = DO_UPCAST(NICState, nc, nc)->opaque;
168 unsigned int rxbase = s->rxbuf * (0x800 / 4);
171 if (!(buf[0] & 0x80) && memcmp(&s->conf.macaddr.a[0], buf, 6))
174 if (s->regs[rxbase + R_RX_CTRL0] & CTRL_S) {
175 D(qemu_log("ethlite lost packet %x\n", s->regs[R_RX_CTRL0]));
179 D(qemu_log("%s %d rxbase=%x\n", __func__, size, rxbase));
180 memcpy(&s->regs[rxbase + R_RX_BUF0], buf, size);
182 s->regs[rxbase + R_RX_CTRL0] |= CTRL_S;
183 if (s->regs[rxbase + R_RX_CTRL0] & CTRL_I)
186 /* If c_rx_pingpong was set flip buffers. */
187 s->rxbuf ^= s->c_rx_pingpong;
191 static void eth_cleanup(VLANClientState *nc)
193 struct xlx_ethlite *s = DO_UPCAST(NICState, nc, nc)->opaque;
198 static NetClientInfo net_xilinx_ethlite_info = {
199 .type = NET_CLIENT_TYPE_NIC,
200 .size = sizeof(NICState),
201 .can_receive = eth_can_rx,
203 .cleanup = eth_cleanup,
206 static int xilinx_ethlite_init(SysBusDevice *dev)
208 struct xlx_ethlite *s = FROM_SYSBUS(typeof (*s), dev);
211 sysbus_init_irq(dev, &s->irq);
214 regs = cpu_register_io_memory(eth_read, eth_write, s, DEVICE_NATIVE_ENDIAN);
215 sysbus_init_mmio(dev, R_MAX * 4, regs);
217 qemu_macaddr_default_if_unset(&s->conf.macaddr);
218 s->nic = qemu_new_nic(&net_xilinx_ethlite_info, &s->conf,
219 dev->qdev.info->name, dev->qdev.id, s);
220 qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a);
224 static SysBusDeviceInfo xilinx_ethlite_info = {
225 .init = xilinx_ethlite_init,
226 .qdev.name = "xilinx,ethlite",
227 .qdev.size = sizeof(struct xlx_ethlite),
228 .qdev.props = (Property[]) {
229 DEFINE_PROP_UINT32("txpingpong", struct xlx_ethlite, c_tx_pingpong, 1),
230 DEFINE_PROP_UINT32("rxpingpong", struct xlx_ethlite, c_rx_pingpong, 1),
231 DEFINE_NIC_PROPERTIES(struct xlx_ethlite, conf),
232 DEFINE_PROP_END_OF_LIST(),
236 static void xilinx_ethlite_register(void)
238 sysbus_register_withprop(&xilinx_ethlite_info);
241 device_init(xilinx_ethlite_register)