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/*
* include/xen/vpl011.h
*
* Virtual PL011 UART
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _VPL011_H_
#define _VPL011_H_
#include <public/domctl.h>
#include <public/io/ring.h>
#include <public/io/console.h>
#include <xen/mm.h>
/* helper macros */
#define VPL011_LOCK(d,flags) spin_lock_irqsave(&(d)->arch.vpl011.lock, flags)
#define VPL011_UNLOCK(d,flags) spin_unlock_irqrestore(&(d)->arch.vpl011.lock, flags)
#define SBSA_UART_FIFO_SIZE 32
/* Same size as VUART_BUF_SIZE, used in vuart.c */
#define SBSA_UART_OUT_BUF_SIZE 128
struct vpl011_xen_backend {
char in[SBSA_UART_FIFO_SIZE];
char out[SBSA_UART_OUT_BUF_SIZE];
XENCONS_RING_IDX in_cons, in_prod;
XENCONS_RING_IDX out_prod;
};
struct vpl011 {
bool backend_in_domain;
union {
struct {
void *ring_buf;
struct page_info *ring_page;
} dom;
struct vpl011_xen_backend *xen;
} backend;
uint32_t uartfr; /* Flag register */
uint32_t uartcr; /* Control register */
uint32_t uartimsc; /* Interrupt mask register*/
uint32_t uarticr; /* Interrupt clear register */
uint32_t uartris; /* Raw interrupt status register */
uint32_t shadow_uartmis; /* shadow masked interrupt register */
paddr_t base_addr;
unsigned int virq;
spinlock_t lock;
evtchn_port_t evtchn;
};
struct vpl011_init_info {
domid_t console_domid;
gfn_t gfn;
evtchn_port_t evtchn;
};
#ifdef CONFIG_SBSA_VUART_CONSOLE
int domain_vpl011_init(struct domain *d,
struct vpl011_init_info *info);
void domain_vpl011_deinit(struct domain *d);
void vpl011_rx_char_xen(struct domain *d, char c);
#else
static inline int domain_vpl011_init(struct domain *d,
struct vpl011_init_info *info)
{
return -ENOSYS;
}
static inline void domain_vpl011_deinit(struct domain *d) { }
#endif
#endif /* _VPL011_H_ */
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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