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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __CONSOLE_H
#define __CONSOLE_H
#include "unistd.h"
#include <lock.h>
/*
* Our internal console uses the format of BML new-style in-memory
* console and supports input for setups without a physical console
* facility or FSP.
*
* (This is v3 of the format, the previous one sucked)
*/
struct memcons {
uint64_t magic;
#define MEMCONS_MAGIC 0x6630696567726173LL
uint64_t obuf_phys;
uint64_t ibuf_phys;
uint32_t obuf_size;
uint32_t ibuf_size;
uint32_t out_pos;
#define MEMCONS_OUT_POS_WRAP 0x80000000u
#define MEMCONS_OUT_POS_MASK 0x00ffffffu
uint32_t in_prod;
uint32_t in_cons;
};
extern struct memcons memcons;
#define INMEM_CON_IN_LEN 16
#define INMEM_CON_OUT_LEN (INMEM_CON_LEN - INMEM_CON_IN_LEN)
/* Console driver */
struct con_ops {
size_t (*write)(const char *buf, size_t len);
size_t (*read)(char *buf, size_t len);
bool (*poll_read)(void);
int64_t (*flush)(void);
};
extern struct lock con_lock;
extern bool dummy_console_enabled(void);
extern void force_dummy_console(void);
extern bool flush_console(void);
extern bool __flush_console(bool flush_to_drivers);
extern void set_console(struct con_ops *driver);
extern void console_complete_flush(void);
extern int mambo_read(void);
extern void mambo_write(const char *buf, size_t count);
extern void enable_mambo_console(void);
ssize_t console_write(bool flush_to_drivers, const void *buf, size_t count);
extern void clear_console(void);
extern void memcons_add_properties(void);
extern void dummy_console_add_nodes(void);
#endif /* __CONSOLE_H */
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