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-rw-r--r--include/arch/aarch32/console_macros.S51
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diff --git a/include/arch/aarch32/console_macros.S b/include/arch/aarch32/console_macros.S
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+++ b/include/arch/aarch32/console_macros.S
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+/*
+ * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#ifndef CONSOLE_MACROS_S
+#define CONSOLE_MACROS_S
+
+#include <drivers/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 r0 and a valid return address in lr.
+ */
+ .macro finish_console_register _driver, putc=0, getc=0, flush=0
+ /*
+ * If any of the callback is not specified or set as 0, then the
+ * corresponding callback entry in console_t is set to 0.
+ */
+ .ifne \putc
+ ldr r1, =console_\_driver\()_putc
+ .else
+ mov r1, #0
+ .endif
+ str r1, [r0, #CONSOLE_T_PUTC]
+
+ .ifne \getc
+ ldr r1, =console_\_driver\()_getc
+ .else
+ mov r1, #0
+ .endif
+ str r1, [r0, #CONSOLE_T_GETC]
+
+ .ifne \flush
+ ldr r1, =console_\_driver\()_flush
+ .else
+ mov r1, #0
+ .endif
+ 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 */