[29] | 1 | /* |
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| 2 | * x86_printf.c - A printf function for x86 (debug only). |
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| 3 | * |
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[145] | 4 | * Copyright (c) 2017 Maxime Villard |
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[29] | 5 | * |
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| 6 | * This file is part of ALMOS-MKH. |
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| 7 | * |
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| 8 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 9 | * under the terms of the GNU General Public License as published by |
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| 10 | * the Free Software Foundation; version 2.0 of the License. |
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| 11 | * |
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| 12 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU General Public License |
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[234] | 18 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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[29] | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |
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[457] | 22 | #include <hal_kernel_types.h> |
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[29] | 23 | #include <hal_boot.h> |
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[39] | 24 | #include <hal_internal.h> |
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[154] | 25 | #include <hal_apic.h> |
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[29] | 26 | |
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| 27 | #include <memcpy.h> |
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| 28 | #include <thread.h> |
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| 29 | #include <string.h> |
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| 30 | #include <process.h> |
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| 31 | #include <printk.h> |
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| 32 | #include <vmm.h> |
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| 33 | #include <core.h> |
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| 34 | #include <cluster.h> |
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| 35 | |
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| 36 | #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) |
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[84] | 37 | #define CONS_X_SIZE 80 |
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| 38 | #define CONS_Y_SIZE 26 |
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[29] | 39 | |
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[84] | 40 | static char cons_buffer[CONS_X_SIZE * 2 * CONS_Y_SIZE] __in_kdata; |
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[29] | 41 | extern intptr_t iom_base; |
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| 42 | size_t cons_ptr __in_kdata = 0; |
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| 43 | |
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[242] | 44 | /* -------------------------------------------------------------------------- */ |
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| 45 | |
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| 46 | static uint32_t x86_lock_val __in_kdata = 0; |
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| 47 | |
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[482] | 48 | void x86_lock( void ) |
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[242] | 49 | { |
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| 50 | while (!hal_atomic_cas(&x86_lock_val, 0, 1)) { |
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| 51 | /* wait */ |
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| 52 | } |
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| 53 | } |
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| 54 | |
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[482] | 55 | void x86_unlock( void ) |
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[242] | 56 | { |
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| 57 | while (!hal_atomic_cas(&x86_lock_val, 1, 0)) { |
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| 58 | /* wait */ |
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| 59 | } |
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| 60 | } |
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| 61 | |
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| 62 | /* -------------------------------------------------------------------------- */ |
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| 63 | |
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[39] | 64 | void x86_panic(char *msg) |
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| 65 | { |
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[242] | 66 | x86_lock(); |
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[39] | 67 | x86_printf("!!!!! PANIC !!!!!\n"); |
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| 68 | x86_printf("-> %s\n", msg); |
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| 69 | x86_printf("!!!!!!!!!!!!!!!!!\n"); |
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[242] | 70 | x86_unlock(); |
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[39] | 71 | while (1); |
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| 72 | } |
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| 73 | |
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[482] | 74 | static void check_scroll( void ) |
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[84] | 75 | { |
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[90] | 76 | char *base = (char *)iom_base + (0xB8000 - IOM_BEGIN); |
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[84] | 77 | char *src, *dst; |
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| 78 | size_t i; |
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| 79 | |
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| 80 | if (cons_ptr < (CONS_X_SIZE * 2) * CONS_Y_SIZE) { |
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| 81 | return; |
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| 82 | } |
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| 83 | |
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| 84 | for (i = 0; i < CONS_Y_SIZE - 1; i++) { |
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| 85 | dst = (char *)&cons_buffer[0] + i * (CONS_X_SIZE * 2); |
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| 86 | src = (char *)&cons_buffer[0] + (i + 1) * (CONS_X_SIZE * 2); |
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| 87 | |
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| 88 | memcpy(dst, src, (CONS_X_SIZE * 2)); |
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| 89 | } |
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| 90 | |
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[90] | 91 | memset(&cons_buffer[0] + (CONS_X_SIZE * 2) * (CONS_Y_SIZE - 1), |
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| 92 | 0, (CONS_X_SIZE * 2)); |
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[84] | 93 | |
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| 94 | cons_ptr -= (CONS_X_SIZE * 2); |
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| 95 | memcpy(base, &cons_buffer[0], (CONS_X_SIZE * 2) * (CONS_Y_SIZE - 1)); |
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| 96 | } |
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| 97 | |
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[94] | 98 | void x86_putc(char c) |
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[29] | 99 | { |
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[154] | 100 | hal_com_send(0, c); |
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| 101 | |
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[29] | 102 | if (c == '\n') { |
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[84] | 103 | cons_ptr = roundup(cons_ptr, CONS_X_SIZE * 2); |
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| 104 | check_scroll(); |
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[29] | 105 | return; |
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| 106 | } |
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| 107 | |
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| 108 | char *video = (char *)iom_base + (0xB8000 - IOM_BEGIN) + cons_ptr; |
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[84] | 109 | char *buf = &cons_buffer[cons_ptr]; |
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[29] | 110 | *video = c; |
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[84] | 111 | *buf = c; |
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| 112 | cons_ptr++, video++, buf++; |
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[29] | 113 | *video = 0x7; |
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[84] | 114 | *buf = 0x7; |
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| 115 | cons_ptr++, video++, buf++; |
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| 116 | |
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| 117 | check_scroll(); |
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[29] | 118 | } |
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| 119 | |
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| 120 | static void x86_itoa(char *buf, unsigned long int n, int base) |
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| 121 | { |
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| 122 | unsigned long int tmp; |
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| 123 | int i, j; |
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| 124 | |
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| 125 | tmp = n; |
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| 126 | i = 0; |
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| 127 | |
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| 128 | do { |
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| 129 | tmp = n % base; |
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| 130 | buf[i++] = (tmp < 10) ? (tmp + '0') : (tmp + 'a' - 10); |
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| 131 | } while (n /= base); |
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| 132 | buf[i--] = 0; |
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| 133 | |
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| 134 | for (j = 0; j < i; j++, i--) { |
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| 135 | tmp = buf[j]; |
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| 136 | buf[j] = buf[i]; |
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| 137 | buf[i] = tmp; |
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| 138 | } |
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| 139 | } |
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| 140 | |
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[32] | 141 | static void x86_ztoa(char *buf, uint64_t n, uint64_t base) |
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| 142 | { |
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| 143 | uint64_t tmp; |
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| 144 | int i, j; |
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| 145 | |
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| 146 | tmp = n; |
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| 147 | i = 0; |
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| 148 | |
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| 149 | do { |
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| 150 | tmp = n % base; |
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| 151 | buf[i++] = (tmp < 10) ? (tmp + '0') : (tmp + 'a' - 10); |
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| 152 | } while (n /= base); |
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| 153 | buf[i--] = 0; |
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| 154 | |
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| 155 | for (j = 0; j < i; j++, i--) { |
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| 156 | tmp = buf[j]; |
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| 157 | buf[j] = buf[i]; |
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| 158 | buf[i] = tmp; |
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| 159 | } |
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| 160 | } |
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| 161 | |
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[90] | 162 | static char alphabet[] = "abcdefghijklmnopqrstuvwxyz"; |
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| 163 | |
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[29] | 164 | void x86_printf(char *s, ...) |
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| 165 | { |
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| 166 | va_list ap; |
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| 167 | |
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[90] | 168 | char buf[64]; |
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[29] | 169 | int i, j, size, buflen, neg; |
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| 170 | |
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| 171 | unsigned char c; |
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| 172 | int ival; |
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| 173 | unsigned int uival; |
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[32] | 174 | uint64_t zval; |
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[29] | 175 | |
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| 176 | va_start(ap, s); |
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| 177 | |
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| 178 | while ((c = *s++)) { |
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| 179 | size = 0; |
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| 180 | neg = 0; |
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| 181 | |
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| 182 | if (c == 0) |
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| 183 | break; |
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| 184 | else if (c == '%') { |
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| 185 | c = *s++; |
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| 186 | if (c >= '0' && c <= '9') { |
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| 187 | size = c - '0'; |
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| 188 | c = *s++; |
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| 189 | } |
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| 190 | |
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[90] | 191 | if (c == 'c') { |
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| 192 | ival = va_arg(ap, int); |
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| 193 | if ((ival - 97) > sizeof(alphabet)) { |
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| 194 | x86_printf("(unknown:%d)", ival); |
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| 195 | } else { |
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| 196 | x86_putc(alphabet[ival - 97]); |
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| 197 | } |
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| 198 | } else if (c == 'z') { |
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[32] | 199 | zval = va_arg(ap, uint64_t); |
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| 200 | x86_ztoa(buf, zval, 10); |
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| 201 | |
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| 202 | buflen = strlen(buf); |
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| 203 | if (buflen < size) |
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| 204 | for (i = size, j = buflen; i >= 0; i--, j--) |
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| 205 | buf[i] = (j >= 0) ? buf[j] : '0'; |
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| 206 | |
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| 207 | x86_printf(buf); |
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| 208 | } else if (c == 'Z') { |
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| 209 | zval = va_arg(ap, uint64_t); |
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| 210 | x86_ztoa(buf, zval, 16); |
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| 211 | |
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| 212 | buflen = strlen(buf); |
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| 213 | if (buflen < size) |
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| 214 | for (i = size, j = buflen; i >= 0; i--, j--) |
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| 215 | buf[i] = (j >= 0) ? buf[j] : '0'; |
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| 216 | |
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| 217 | x86_printf("0x%s", buf); |
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| 218 | } else if (c == 'd') { |
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[29] | 219 | ival = va_arg(ap, int); |
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| 220 | if (ival < 0) { |
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| 221 | uival = 0 - ival; |
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| 222 | neg++; |
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| 223 | } else |
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| 224 | uival = ival; |
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| 225 | x86_itoa(buf, uival, 10); |
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| 226 | |
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| 227 | buflen = strlen(buf); |
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| 228 | if (buflen < size) |
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| 229 | for (i = size, j = buflen; i >= 0; |
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| 230 | i--, j--) |
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| 231 | buf[i] = |
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| 232 | (j >= |
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| 233 | 0) ? buf[j] : '0'; |
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| 234 | |
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| 235 | if (neg) |
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| 236 | x86_printf("-%s", buf); |
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| 237 | else |
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| 238 | x86_printf(buf); |
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| 239 | } else if (c == 'u') { |
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| 240 | uival = va_arg(ap, int); |
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| 241 | x86_itoa(buf, uival, 10); |
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| 242 | |
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| 243 | buflen = strlen(buf); |
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| 244 | if (buflen < size) |
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| 245 | for (i = size, j = buflen; i >= 0; |
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| 246 | i--, j--) |
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| 247 | buf[i] = |
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| 248 | (j >= |
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| 249 | 0) ? buf[j] : '0'; |
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| 250 | |
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| 251 | x86_printf(buf); |
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| 252 | } else if (c == 'x' || c == 'X') { |
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| 253 | uival = va_arg(ap, int); |
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| 254 | x86_itoa(buf, uival, 16); |
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| 255 | |
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| 256 | buflen = strlen(buf); |
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| 257 | if (buflen < size) |
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| 258 | for (i = size, j = buflen; i >= 0; |
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| 259 | i--, j--) |
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| 260 | buf[i] = |
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| 261 | (j >= |
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| 262 | 0) ? buf[j] : '0'; |
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| 263 | |
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| 264 | x86_printf("0x%s", buf); |
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| 265 | } else if (c == 'p') { |
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| 266 | uival = va_arg(ap, int); |
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| 267 | x86_itoa(buf, uival, 16); |
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| 268 | size = 8; |
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| 269 | |
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| 270 | buflen = strlen(buf); |
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| 271 | if (buflen < size) |
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| 272 | for (i = size, j = buflen; i >= 0; |
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| 273 | i--, j--) |
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| 274 | buf[i] = |
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| 275 | (j >= |
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| 276 | 0) ? buf[j] : '0'; |
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| 277 | |
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| 278 | x86_printf("0x%s", buf); |
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| 279 | } else if (c == 's') { |
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[47] | 280 | x86_printf((char *) va_arg(ap, uint64_t)); |
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[145] | 281 | } |
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[29] | 282 | } else |
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| 283 | x86_putc(c); |
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| 284 | } |
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| 285 | |
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| 286 | return; |
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| 287 | } |
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