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/*
* Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef CONSOLE_H
#define CONSOLE_H
#include <lib/utils_def.h>
#define CONSOLE_T_NEXT (U(0) * REGSZ)
#define CONSOLE_T_FLAGS (U(1) * REGSZ)
#define CONSOLE_T_PUTC (U(2) * REGSZ)
#define CONSOLE_T_GETC (U(3) * REGSZ)
#define CONSOLE_T_FLUSH (U(4) * REGSZ)
#define CONSOLE_T_DRVDATA (U(5) * REGSZ)
#define CONSOLE_FLAG_BOOT (U(1) << 0)
#define CONSOLE_FLAG_RUNTIME (U(1) << 1)
#define CONSOLE_FLAG_CRASH (U(1) << 2)
/* Bits 3 to 7 reserved for additional scopes in future expansion. */
#define CONSOLE_FLAG_SCOPE_MASK ((U(1) << 8) - 1)
/* Bits 8 to 31 reserved for non-scope use in future expansion. */
/* Returned by getc callbacks when receive FIFO is empty. */
#define ERROR_NO_PENDING_CHAR (-1)
/* Returned by console_xxx() if no registered console implements xxx. */
#define ERROR_NO_VALID_CONSOLE (-128)
#ifndef __ASSEMBLY__
#include <stdint.h>
typedef struct console {
struct console *next;
/*
* Only the low 32 bits are used. The type is u_register_t to align the
* fields of the struct to 64 bits in AArch64 and 32 bits in AArch32
*/
u_register_t flags;
int (*const putc)(int character, struct console *console);
int (*const getc)(struct console *console);
int (*const flush)(struct console *console);
/* Additional private driver data may follow here. */
} console_t;
/* offset macro assertions for console_t */
#include <drivers/console_assertions.h>
/*
* NOTE: There is no publicly accessible console_register() function. Consoles
* are registered by directly calling the register function of a specific
* implementation, e.g. console_16550_register() from <uart_16550.h>. Consoles
* registered that way can be unregistered/reconfigured with below functions.
*/
/* Remove a single console_t instance from the console list. Return a pointer to
* the console that was removed if it was found, or NULL if not. */
console_t *console_unregister(console_t *console);
/* Returns 1 if this console is already registered, 0 if not */
int console_is_registered(console_t *console);
/*
* Set scope mask of a console that determines in what states it is active.
* By default they are registered with (CONSOLE_FLAG_BOOT|CONSOLE_FLAG_CRASH).
*/
void console_set_scope(console_t *console, unsigned int scope);
/* Switch to a new global console state (CONSOLE_FLAG_BOOT/RUNTIME/CRASH). */
void console_switch_state(unsigned int new_state);
/* Output a character on all consoles registered for the current state. */
int console_putc(int c);
/* Read a character (blocking) from any console registered for current state. */
int console_getc(void);
/* Flush all consoles registered for the current state. */
int console_flush(void);
#if !MULTI_CONSOLE_API
/* REMOVED on AArch64 -- use console_<driver>_register() instead! */
int console_init(uintptr_t base_addr,
unsigned int uart_clk, unsigned int baud_rate);
void console_uninit(void);
#endif
#endif /* __ASSEMBLY__ */
#endif /* CONSOLE_H */