Introduce STMicroelectronics STM32MP1 platform

STM32MP1 is a microprocessor designed by STMicroelectronics,
based on a dual Arm Cortex-A7.
It is an Armv7-A platform, using dedicated code from TF-A.

STM32MP1 uses BL2 compiled with BL2_AT_EL3.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Mathieu Belou <mathieu.belou@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Pascal Paillet <p.paillet@st.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/drivers/st/uart/aarch32/stm32_console.S b/drivers/st/uart/aarch32/stm32_console.S
new file mode 100644
index 000000000..2b7c83d59
--- /dev/null
+++ b/drivers/st/uart/aarch32/stm32_console.S
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <asm_macros.S>
+
+	.globl	console_core_init
+	.globl	console_core_putc
+	.globl	console_core_getc
+	.globl	console_core_flush
+
+	/* -----------------------------------------------------------------
+	 * int console_core_init(uintptr_t 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 console_init
+	 * and crash reporting.
+	 *
+	 * In: r0 - console base address
+	 *     r1 - Uart clock in Hz
+	 *     r2 - Baud rate
+	 * Out: return 1 on success else 0 on error
+	 * Clobber list : r1, r2, r3
+	 * -----------------------------------------------------------------
+	 */
+func console_core_init
+	bx	lr
+endfunc console_core_init
+
+	/* ---------------------------------------------------------------
+	 * int console_core_putc(int c, uintptr_t base_addr)
+	 *
+	 * Function to output a character over the console. It returns the
+	 * character printed on success or -1 on error.
+	 *
+	 * In : r0 - character to be printed
+	 *      r1 - console base address
+	 * Out : return -1 on error else return character.
+	 * Clobber list : r2
+	 * ---------------------------------------------------------------
+	 */
+func console_core_putc
+	bx	lr
+endfunc console_core_putc
+
+	/* -----------------------------------------------------------
+	 * int console_core_getc(uintptr_t base_addr)
+	 *
+	 * Function to get a character from the console.
+	 * It returns the character grabbed on success or -1 on error.
+	 *
+	 * In : r0 - console base address
+	 * Out : return -1.
+	 * Clobber list : r0, r1
+	 * -----------------------------------------------------------
+	 */
+func console_core_getc
+	/* Not supported */
+	mov	r0, #-1
+	bx	lr
+endfunc console_core_getc
+
+	/* ---------------------------------------------------------------
+	 * int console_core_flush(uintptr_t base_addr)
+	 *
+	 * Function to force a write of all buffered data that hasn't been
+	 * output.
+	 *
+	 * In : r0 - console base address
+	 * Out : return -1 on error else return 0.
+	 * Clobber list : r0, r1
+	 * ---------------------------------------------------------------
+	 */
+func console_core_flush
+	bx	lr
+endfunc console_core_flush