diff options
Diffstat (limited to 'drivers/arm/pl011/pl011_console.S')
| -rw-r--r-- | drivers/arm/pl011/pl011_console.S | 179 |
1 files changed, 5 insertions, 174 deletions
diff --git a/drivers/arm/pl011/pl011_console.S b/drivers/arm/pl011/pl011_console.S index 5ff1582c..1789f153 100644 --- a/drivers/arm/pl011/pl011_console.S +++ b/drivers/arm/pl011/pl011_console.S @@ -1,178 +1,9 @@ /* - * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved. * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * Redistributions of source code must retain the above copyright notice, this - * list of conditions and the following disclaimer. - * - * Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * - * Neither the name of ARM nor the names of its contributors may be used - * to endorse or promote products derived from this software without specific - * prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. + * SPDX-License-Identifier: BSD-3-Clause */ -#include <arch.h> -#include <asm_macros.S> -#include <pl011.h> - - .globl console_init - .globl console_putc - .globl console_core_init - .globl console_core_putc - .globl console_getc - - /* - * The console base is in the data section and not in .bss - * even though it is zero-init. In particular, this allows - * the console functions to start using this variable before - * the runtime memory is initialized for images which do not - * need to copy the .data section from ROM to RAM. - */ -.section .data.console_base ; .align 3 - console_base: .quad 0x0 - - /* ----------------------------------------------- - * int console_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. It saves - * the console base to the data section. - * In: x0 - console base address - * w1 - Uart clock in Hz - * w2 - Baud rate - * out: return 1 on success. - * Clobber list : x1 - x3 - * ----------------------------------------------- - */ -func console_init - adrp x3, console_base - str x0, [x3, :lo12:console_base] - b console_core_init - - /* ----------------------------------------------- - * int console_core_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 console_init and - * 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_core_init - /* Check the input base address */ - cbz x0, init_fail - /* Check baud rate and uart clock for sanity */ - cbz w1, init_fail - cbz w2, init_fail - /* Program the baudrate */ - /* Divisor = (Uart clock * 4) / baudrate */ - lsl w1, w1, #2 - udiv w2, w1, w2 - /* IBRD = Divisor >> 6 */ - lsr w1, w2, #6 - /* Write the IBRD */ - str w1, [x0, #UARTIBRD] - /* FBRD = Divisor & 0x3F */ - and w1, w2, #0x3f - /* Write the FBRD */ - str w1, [x0, #UARTFBRD] - mov w1, #PL011_LINE_CONTROL - str w1, [x0, #UARTLCR_H] - /* Clear any pending errors */ - str wzr, [x0, #UARTECR] - /* Enable tx, rx, and uart overall */ - mov w1, #(PL011_UARTCR_RXE | PL011_UARTCR_TXE | PL011_UARTCR_UARTEN) - str w1, [x0, #UARTCR] - mov w0, #1 -init_fail: - ret - - /* --------------------------------------------- - * int console_putc(int c) - * Function to output a character over the - * console. It returns the character printed on - * success or -1 on error. - * In : x0 - character to be printed - * Out : return -1 on error else return character. - * Clobber list : x1, x2 - * --------------------------------------------- - */ -func console_putc - adrp x2, console_base - ldr x1, [x2, :lo12:console_base] - b console_core_putc - - /* -------------------------------------------------------- - * int console_core_putc(int c, unsigned int base_addr) - * 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 - console base address - * Out : return -1 on error else return character. - * Clobber list : x2 - * -------------------------------------------------------- - */ -func console_core_putc - /* Check the input parameter */ - cbz x1, putc_error - /* Prepend '\r' to '\n' */ - cmp w0, #0xA - b.ne 2f -1: - /* Check if the transmit FIFO is full */ - ldr w2, [x1, #UARTFR] - tbnz w2, #PL011_UARTFR_TXFF_BIT, 1b - mov w2, #0xD - str w2, [x1, #UARTDR] -2: - /* Check if the transmit FIFO is full */ - ldr w2, [x1, #UARTFR] - tbnz w2, #PL011_UARTFR_TXFF_BIT, 2b - str w0, [x1, #UARTDR] - ret -putc_error: - mov w0, #-1 - ret - /* --------------------------------------------- - * int console_getc(void) - * Function to get a character from the console. - * It returns the character grabbed on success - * or -1 on error. - * Clobber list : x0, x1 - * --------------------------------------------- - */ -func console_getc - adrp x0, console_base - ldr x1, [x0, :lo12:console_base] - cbz x1, getc_error -1: - /* Check if the receive FIFO is empty */ - ldr w0, [x1, #UARTFR] - tbnz w0, #PL011_UARTFR_RXFE_BIT, 1b - ldr w0, [x1, #UARTDR] - ret -getc_error: - mov w0, #-1 - ret +#if !ERROR_DEPRECATED +#include "./aarch64/pl011_console.S" +#endif |