GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/trusted-firmware/trusted-firmware-a-2.8/include/arch/aarch64/console_macros.S

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2017-2019, 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 x0 and a valid return address in x30.
+ */
+	.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
+	  adrp	x1, console_\_driver\()_putc
+	  add	x1, x1, :lo12:console_\_driver\()_putc
+	  str	x1, [x0, #CONSOLE_T_PUTC]
+	.else
+	  str	xzr, [x0, #CONSOLE_T_PUTC]
+	.endif
+
+	.ifne \getc
+	  adrp	x1, console_\_driver\()_getc
+	  add	x1, x1, :lo12:console_\_driver\()_getc
+	  str	x1, [x0, #CONSOLE_T_GETC]
+	.else
+	  str	xzr, [x0, #CONSOLE_T_GETC]
+	.endif
+
+	.ifne \flush
+	  adrp	x1, console_\_driver\()_flush
+	  add	x1, x1, :lo12:console_\_driver\()_flush
+	  str	x1, [x0, #CONSOLE_T_FLUSH]
+	.else
+	  str	xzr, [x0, #CONSOLE_T_FLUSH]
+	.endif
+
+	mov	x1, #(CONSOLE_FLAG_BOOT | CONSOLE_FLAG_CRASH)
+	str	x1, [x0, #CONSOLE_T_FLAGS]
+	b	console_register
+	.endm
+
+#endif /* CONSOLE_MACROS_S */