1 /*
2 * include/xen/vpl011.h
3 *
4 * Virtual PL011 UART
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program; If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #ifndef _VPL011_H_
20 #define _VPL011_H_
21
22 #include <public/domctl.h>
23 #include <public/io/ring.h>
24 #include <asm/vreg.h>
25 #include <xen/mm.h>
26
27 /* helper macros */
28 #define VPL011_LOCK(d,flags) spin_lock_irqsave(&(d)->arch.vpl011.lock, flags)
29 #define VPL011_UNLOCK(d,flags) spin_unlock_irqrestore(&(d)->arch.vpl011.lock, flags)
30
31 #define SBSA_UART_FIFO_SIZE 32
32
33 struct vpl011 {
34 void *ring_buf;
35 struct page_info *ring_page;
36 uint32_t uartfr; /* Flag register */
37 uint32_t uartcr; /* Control register */
38 uint32_t uartimsc; /* Interrupt mask register*/
39 uint32_t uarticr; /* Interrupt clear register */
40 uint32_t uartris; /* Raw interrupt status register */
41 uint32_t shadow_uartmis; /* shadow masked interrupt register */
42 spinlock_t lock;
43 evtchn_port_t evtchn;
44 };
45
46 struct vpl011_init_info {
47 domid_t console_domid;
48 gfn_t gfn;
49 evtchn_port_t evtchn;
50 };
51
52 #ifdef CONFIG_SBSA_VUART_CONSOLE
53 int domain_vpl011_init(struct domain *d,
54 struct vpl011_init_info *info);
55 void domain_vpl011_deinit(struct domain *d);
56 #else
domain_vpl011_init(struct domain * d,struct vpl011_init_info * info)57 static inline int domain_vpl011_init(struct domain *d,
58 struct vpl011_init_info *info)
59 {
60 return -ENOSYS;
61 }
62
domain_vpl011_deinit(struct domain * d)63 static inline void domain_vpl011_deinit(struct domain *d) { }
64 #endif
65 #endif /* _VPL011_H_ */
66
67 /*
68 * Local variables:
69 * mode: C
70 * c-file-style: "BSD"
71 * c-basic-offset: 4
72 * indent-tabs-mode: nil
73 * End:
74 */
75