Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4073 | rimsky | 1 | /* |
| 2 | * Copyright (c) 2006 Ondrej Palkovsky |
||
| 3 | * Copyright (c) 2008 Martin Decky |
||
| 4 | * Copyright (c) 2008 Pavel Rimsky |
||
| 5 | * All rights reserved. |
||
| 6 | * |
||
| 7 | * Redistribution and use in source and binary forms, with or without |
||
| 8 | * modification, are permitted provided that the following conditions |
||
| 9 | * are met: |
||
| 10 | * |
||
| 11 | * - Redistributions of source code must retain the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer. |
||
| 13 | * - Redistributions in binary form must reproduce the above copyright |
||
| 14 | * notice, this list of conditions and the following disclaimer in the |
||
| 15 | * documentation and/or other materials provided with the distribution. |
||
| 16 | * - The name of the author may not be used to endorse or promote products |
||
| 17 | * derived from this software without specific prior written permission. |
||
| 18 | * |
||
| 19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 29 | */ |
||
| 30 | |||
| 31 | /** @defgroup niagarafb SGCN |
||
| 32 | * @brief userland driver of the Niagara console output |
||
| 33 | * @{ |
||
| 34 | */ |
||
| 35 | /** @file |
||
| 36 | */ |
||
| 37 | |||
| 38 | #include <async.h> |
||
| 39 | #include <sysinfo.h> |
||
| 40 | #include <as.h> |
||
| 41 | #include <errno.h> |
||
| 42 | #include <stdio.h> |
||
| 43 | #include <ddi.h> |
||
| 44 | |||
| 45 | #include "serial_console.h" |
||
| 46 | #include "niagara.h" |
||
| 47 | |||
| 48 | #define WIDTH 80 |
||
| 49 | #define HEIGHT 24 |
||
| 50 | |||
| 51 | /** |
||
| 52 | * Virtual address mapped to the buffer shared with the kernel counterpart. |
||
| 53 | */ |
||
| 54 | static uintptr_t output_buffer_addr; |
||
| 55 | |||
| 56 | /* |
||
| 57 | * Kernel counterpart of the driver reads characters to be printed from here. |
||
| 58 | * Keep in sync with the definition from |
||
| 59 | * kernel/arch/sparc64/src/drivers/niagara.c. |
||
| 60 | */ |
||
| 61 | #define OUTPUT_BUFFER_SIZE ((PAGE_SIZE) - 2 * 8) |
||
| 62 | typedef volatile struct { |
||
| 63 | uint64_t read_ptr; |
||
| 64 | uint64_t write_ptr; |
||
| 65 | char data[OUTPUT_BUFFER_SIZE]; |
||
| 66 | } |
||
| 67 | __attribute__ ((packed)) |
||
| 68 | __attribute__ ((aligned(PAGE_SIZE))) |
||
| 69 | *output_buffer_t; |
||
| 70 | |||
| 71 | output_buffer_t output_buffer; |
||
| 72 | |||
| 73 | /** |
||
| 74 | * Pushes the character to the Niagara serial. |
||
| 75 | * @param c character to be pushed |
||
| 76 | */ |
||
| 77 | static void niagara_putc(char c) |
||
| 78 | { |
||
| 79 | while (output_buffer->write_ptr == |
||
| 80 | (output_buffer->read_ptr + OUTPUT_BUFFER_SIZE - 1) |
||
| 81 | % OUTPUT_BUFFER_SIZE) |
||
| 82 | ; |
||
| 83 | output_buffer->data[output_buffer->write_ptr] = (uint64_t) c; |
||
| 84 | output_buffer->write_ptr = |
||
| 85 | ((output_buffer->write_ptr) + 1) % OUTPUT_BUFFER_SIZE; |
||
| 86 | } |
||
| 87 | |||
| 88 | /** |
||
| 89 | * Initializes the Niagara serial driver. |
||
| 90 | */ |
||
| 91 | int niagara_init(void) |
||
| 92 | { |
||
| 93 | output_buffer_addr = (uintptr_t) as_get_mappable_page(PAGE_SIZE); |
||
| 94 | int result = physmem_map( |
||
| 95 | (void *) sysinfo_value("niagara.outbuf.address"), |
||
| 96 | (void *) output_buffer_addr, |
||
| 97 | 1, AS_AREA_READ | AS_AREA_WRITE); |
||
| 98 | |||
| 99 | if (result != 0) { |
||
| 100 | printf("Niagara: uspace driver couldn't map physical memory: %d\n", |
||
| 101 | result); |
||
| 102 | } |
||
| 103 | |||
| 104 | output_buffer = (output_buffer_t) output_buffer_addr; |
||
| 105 | |||
| 106 | serial_console_init(niagara_putc, WIDTH, HEIGHT); |
||
| 107 | async_set_client_connection(serial_client_connection); |
||
| 108 | return 0; |
||
| 109 | } |
||
| 110 | |||
| 111 | /** |
||
| 112 | * @} |
||
| 113 | */ |
||
| 114 |