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path: root/drivers/renesas/common/console/rcar_console.S
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Diffstat (limited to 'drivers/renesas/common/console/rcar_console.S')
-rw-r--r--drivers/renesas/common/console/rcar_console.S93
1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/renesas/common/console/rcar_console.S b/drivers/renesas/common/console/rcar_console.S
new file mode 100644
index 0000000000..29baa67a4a
--- /dev/null
+++ b/drivers/renesas/common/console/rcar_console.S
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2018-2019, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <console_macros.S>
+#include <drivers/renesas/rcar/console/console.h>
+
+ .globl console_rcar_register
+ .globl console_rcar_init
+ .globl console_rcar_putc
+ .globl console_rcar_flush
+
+ .extern rcar_log_init
+ .extern rcar_set_log_data
+
+ /* -----------------------------------------------
+ * int console_rcar_register(
+ * uintptr_t base, uint32_t clk, uint32_t baud,
+ * console_t *console)
+ * Function to initialize and register a new rcar
+ * console. Storage passed in for the console struct
+ * *must* be persistent (i.e. not from the stack).
+ * In: x0 - UART register base address
+ * w1 - UART clock in Hz
+ * w2 - Baud rate
+ * x3 - pointer to empty console_t struct
+ * Out: return 1 on success, 0 on error
+ * Clobber list : x0, x1, x2, x6, x7, x14
+ * -----------------------------------------------
+ */
+func console_rcar_register
+ mov x7, x30
+ mov x6, x3
+ cbz x6, register_fail
+ str x0, [x6, #CONSOLE_T_BASE]
+
+ bl rcar_log_init
+ cbz x0, register_fail
+
+ mov x0, x6
+ mov x30, x7
+ finish_console_register rcar, putc=1, getc=0, flush=1
+
+register_fail:
+ ret x7
+endfunc console_rcar_register
+
+ /* ---------------------------------------------
+ * int console_rcar_init(unsigned long base_addr,
+ * unsigned int uart_clk, unsigned int baud_rate)
+ * Function to initialize the console without a
+ * C Runtime to print debug information. This
+ * function will be accessed by crash reporting.
+ * In: x0 - console base address
+ * w1 - Uart clock in Hz
+ * w2 - Baud rate
+ * Out: return 1 on success
+ * Clobber list : x1, x2
+ * ---------------------------------------------
+ */
+func console_rcar_init
+ mov w0, #0
+ ret
+endfunc console_rcar_init
+
+ /* --------------------------------------------------------
+ * int console_rcar_putc(int c, console_t *console)
+ * Function to output a character over the console. It
+ * returns the character printed on success or -1 on error.
+ * In : w0 - character to be printed
+ * x1 - pointer to console_t structure
+ * Out : return -1 on error else return character.
+ * Clobber list : x2
+ * --------------------------------------------------------
+ */
+func console_rcar_putc
+ b rcar_set_log_data
+endfunc console_rcar_putc
+
+ /* ---------------------------------------------
+ * void console_rcar_flush(void)
+ * Function to force a write of all buffered
+ * data that hasn't been output. It returns void
+ * Clobber list : x0, x1
+ * ---------------------------------------------
+ */
+func console_rcar_flush
+ ret
+endfunc console_rcar_flush