| 0,0 → 1,114 |
|---|
| /* |
| * Copyright (c) 2006 Ondrej Palkovsky |
| * Copyright (c) 2008 Martin Decky |
| * Copyright (c) 2008 Pavel Rimsky |
| * 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. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. |
| */ |
| |
| /** @defgroup niagarafb SGCN |
| * @brief userland driver of the Niagara console output |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include <async.h> |
| #include <sysinfo.h> |
| #include <as.h> |
| #include <errno.h> |
| #include <stdio.h> |
| #include <ddi.h> |
| |
| #include "serial_console.h" |
| #include "niagara.h" |
| |
| #define WIDTH 80 |
| #define HEIGHT 24 |
| |
| /** |
| * Virtual address mapped to the buffer shared with the kernel counterpart. |
| */ |
| static uintptr_t output_buffer_addr; |
| |
| /* |
| * Kernel counterpart of the driver reads characters to be printed from here. |
| * Keep in sync with the definition from |
| * kernel/arch/sparc64/src/drivers/niagara.c. |
| */ |
| #define OUTPUT_BUFFER_SIZE ((PAGE_SIZE) - 2 * 8) |
| typedef volatile struct { |
| uint64_t read_ptr; |
| uint64_t write_ptr; |
| char data[OUTPUT_BUFFER_SIZE]; |
| } |
| __attribute__ ((packed)) |
| __attribute__ ((aligned(PAGE_SIZE))) |
| *output_buffer_t; |
| |
| output_buffer_t output_buffer; |
| |
| /** |
| * Pushes the character to the Niagara serial. |
| * @param c character to be pushed |
| */ |
| static void niagara_putc(char c) |
| { |
| while (output_buffer->write_ptr == |
| (output_buffer->read_ptr + OUTPUT_BUFFER_SIZE - 1) |
| % OUTPUT_BUFFER_SIZE) |
| ; |
| output_buffer->data[output_buffer->write_ptr] = (uint64_t) c; |
| output_buffer->write_ptr = |
| ((output_buffer->write_ptr) + 1) % OUTPUT_BUFFER_SIZE; |
| } |
| |
| /** |
| * Initializes the Niagara serial driver. |
| */ |
| int niagara_init(void) |
| { |
| output_buffer_addr = (uintptr_t) as_get_mappable_page(PAGE_SIZE); |
| int result = physmem_map( |
| (void *) sysinfo_value("niagara.outbuf.address"), |
| (void *) output_buffer_addr, |
| 1, AS_AREA_READ | AS_AREA_WRITE); |
| |
| if (result != 0) { |
| printf("Niagara: uspace driver couldn't map physical memory: %d\n", |
| result); |
| } |
| |
| output_buffer = (output_buffer_t) output_buffer_addr; |
| |
| serial_console_init(niagara_putc, WIDTH, HEIGHT); |
| async_set_client_connection(serial_client_connection); |
| return 0; |
| } |
| |
| /** |
| * @} |
| */ |
| |