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/*
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef __CONSOLE_MACROS_S__
#define __CONSOLE_MACROS_S__
#include <console.h>
/*
* This macro encapsulates the common setup that has to be done at the end of
* a console driver's register function. It will register all of the driver's
* callbacks in the console_t structure and initialize the flags field (by
* default consoles are enabled for the "boot" and "crash" states, this can be
* changed after registration with the console_set_scope() function). It ends
* with a tail call that will include return to the caller.
* REQUIRES console_t pointer in x0 and a valid return address in x30.
*/
.macro finish_console_register _driver
/*
* Add these weak definitions so we will automatically write a 0 if the
* function doesn't exist. I'd rather use .ifdef but that only works if
* the function was defined (not just declared .global) above this point
* in the file, which we can't guarantee.
*/
.weak console_\_driver\()_putc
.weak console_\_driver\()_getc
.weak console_\_driver\()_flush
/* Don't use adrp on weak funcs! See GNU ld bugzilla issue 22589. */
ldr r1, =console_\_driver\()_putc
str r1, [r0, #CONSOLE_T_PUTC]
ldr r1, =console_\_driver\()_getc
str r1, [r0, #CONSOLE_T_GETC]
ldr r1, =console_\_driver\()_flush
str r1, [r0, #CONSOLE_T_FLUSH]
mov r1, #(CONSOLE_FLAG_BOOT | CONSOLE_FLAG_CRASH)
str r1, [r0, #CONSOLE_T_FLAGS]
b console_register
.endm
#endif /* __CONSOLE_MACROS_S__ */