linux-user: stack_base is now mandatory on all targets
[qemu.git] / hw / usb-libhw.c
1 /*
2 * QEMU USB emulation, libhw bits.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
21 */
22 #include "qemu-common.h"
23 #include "cpu-common.h"
24 #include "usb.h"
25 #include "dma.h"
26
27 int usb_packet_map(USBPacket *p, QEMUSGList *sgl)
28 {
29 int is_write = (p->pid == USB_TOKEN_IN);
30 target_phys_addr_t len;
31 void *mem;
32 int i;
33
34 for (i = 0; i < sgl->nsg; i++) {
35 len = sgl->sg[i].len;
36 mem = cpu_physical_memory_map(sgl->sg[i].base, &len,
37 is_write);
38 if (!mem) {
39 goto err;
40 }
41 qemu_iovec_add(&p->iov, mem, len);
42 if (len != sgl->sg[i].len) {
43 goto err;
44 }
45 }
46 return 0;
47
48 err:
49 usb_packet_unmap(p);
50 return -1;
51 }
52
53 void usb_packet_unmap(USBPacket *p)
54 {
55 int is_write = (p->pid == USB_TOKEN_IN);
56 int i;
57
58 for (i = 0; i < p->iov.niov; i++) {
59 cpu_physical_memory_unmap(p->iov.iov[i].iov_base,
60 p->iov.iov[i].iov_len, is_write,
61 p->iov.iov[i].iov_len);
62 }
63 }