Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | #include <console/console.h> |
Kyösti Mälkki | 1d7541f | 2014-02-17 21:34:42 +0200 | [diff] [blame] | 21 | #include <console/cbmem_console.h> |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 22 | #include <cbmem.h> |
Stefan Reinauer | fd4f413 | 2013-06-19 12:25:44 -0700 | [diff] [blame] | 23 | #include <arch/early_variables.h> |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 24 | #include <string.h> |
| 25 | |
| 26 | /* |
| 27 | * Structure describing console buffer. It is overlaid on a flat memory area, |
Martin Roth | cbf2bd7 | 2013-07-09 21:51:14 -0600 | [diff] [blame] | 28 | * with buffer_body covering the extent of the memory. Once the buffer is |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 29 | * full, the cursor keeps going but the data is dropped on the floor. This |
| 30 | * allows to tell how much data was lost in the process. |
| 31 | */ |
| 32 | struct cbmem_console { |
| 33 | u32 buffer_size; |
| 34 | u32 buffer_cursor; |
| 35 | u8 buffer_body[0]; |
| 36 | } __attribute__ ((__packed__)); |
| 37 | |
Aaron Durbin | 2ad6bd2 | 2013-05-10 00:45:37 -0500 | [diff] [blame] | 38 | static struct cbmem_console *cbmem_console_p CAR_GLOBAL; |
| 39 | |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 40 | static void copy_console_buffer(struct cbmem_console *old_cons_p, |
| 41 | struct cbmem_console *new_cons_p); |
| 42 | |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 43 | #ifdef __PRE_RAM__ |
| 44 | /* |
| 45 | * While running from ROM, before DRAM is initialized, some area in cache as |
| 46 | * ram space is used for the console buffer storage. The size and location of |
| 47 | * the area are defined in the config. |
| 48 | */ |
Gabe Black | 19e7e7d | 2011-10-01 04:27:32 -0700 | [diff] [blame] | 49 | |
Gabe Black | 35382a6 | 2014-04-02 17:57:05 -0700 | [diff] [blame] | 50 | extern struct cbmem_console preram_cbmem_console; |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 51 | |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 52 | #else |
| 53 | |
| 54 | /* |
| 55 | * When running from RAM, a lot of console output is generated before CBMEM is |
| 56 | * reinitialized. This static buffer is used to store that output temporarily, |
| 57 | * to be concatenated with the CBMEM console buffer contents accumulated |
| 58 | * during the ROM stage, once CBMEM becomes available at RAM stage. |
| 59 | */ |
Stefan Reinauer | 19d06b2 | 2013-09-09 11:22:18 -0700 | [diff] [blame] | 60 | |
| 61 | #if CONFIG_DYNAMIC_CBMEM |
| 62 | #define STATIC_CONSOLE_SIZE 1024 |
| 63 | #else |
Kyösti Mälkki | 44c0e4e | 2013-11-27 22:54:11 +0200 | [diff] [blame] | 64 | #define STATIC_CONSOLE_SIZE CONFIG_CONSOLE_CBMEM_BUFFER_SIZE |
Stefan Reinauer | 19d06b2 | 2013-09-09 11:22:18 -0700 | [diff] [blame] | 65 | #endif |
| 66 | static u8 static_console[STATIC_CONSOLE_SIZE]; |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 67 | #endif |
| 68 | |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 69 | /* flags for init */ |
| 70 | #define CBMEMC_RESET (1<<0) |
| 71 | #define CBMEMC_APPEND (1<<1) |
| 72 | |
Aaron Durbin | 2ad6bd2 | 2013-05-10 00:45:37 -0500 | [diff] [blame] | 73 | static inline struct cbmem_console *current_console(void) |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 74 | { |
Kyösti Mälkki | e455425 | 2014-12-31 18:34:59 +0200 | [diff] [blame] | 75 | return car_sync_var(cbmem_console_p); |
Aaron Durbin | 2ad6bd2 | 2013-05-10 00:45:37 -0500 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | static inline void current_console_set(struct cbmem_console *new_console_p) |
| 79 | { |
Aaron Durbin | 2ad6bd2 | 2013-05-10 00:45:37 -0500 | [diff] [blame] | 80 | car_set_var(cbmem_console_p, new_console_p); |
Aaron Durbin | 2ad6bd2 | 2013-05-10 00:45:37 -0500 | [diff] [blame] | 81 | } |
| 82 | |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 83 | static inline void init_console_ptr(void *storage, u32 total_space, int flags) |
Aaron Durbin | 2ad6bd2 | 2013-05-10 00:45:37 -0500 | [diff] [blame] | 84 | { |
| 85 | struct cbmem_console *cbm_cons_p = storage; |
| 86 | |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 87 | if (!cbm_cons_p) { |
| 88 | current_console_set(NULL); |
| 89 | return; |
| 90 | } |
| 91 | |
| 92 | if (flags & CBMEMC_RESET) { |
| 93 | cbm_cons_p->buffer_size = total_space - sizeof(struct cbmem_console); |
| 94 | cbm_cons_p->buffer_cursor = 0; |
| 95 | } |
| 96 | if (flags & CBMEMC_APPEND) { |
| 97 | struct cbmem_console *tmp_cons_p = current_console(); |
| 98 | if (tmp_cons_p) |
| 99 | copy_console_buffer(tmp_cons_p, cbm_cons_p); |
| 100 | } |
| 101 | |
| 102 | current_console_set(cbm_cons_p); |
Aaron Durbin | 2ad6bd2 | 2013-05-10 00:45:37 -0500 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | void cbmemc_init(void) |
| 106 | { |
| 107 | #ifdef __PRE_RAM__ |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 108 | int flags = CBMEMC_RESET; |
| 109 | |
| 110 | /* Do not clear output from bootblock. */ |
| 111 | if (ENV_ROMSTAGE && !IS_ENABLED(CONFIG_CACHE_AS_RAM)) |
| 112 | if (IS_ENABLED(CONFIG_BOOTBLOCK_CONSOLE)) |
| 113 | flags = 0; |
| 114 | |
Gabe Black | 35382a6 | 2014-04-02 17:57:05 -0700 | [diff] [blame] | 115 | init_console_ptr(&preram_cbmem_console, |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 116 | CONFIG_CONSOLE_PRERAM_BUFFER_SIZE, flags); |
Aaron Durbin | 2ad6bd2 | 2013-05-10 00:45:37 -0500 | [diff] [blame] | 117 | #else |
| 118 | /* |
| 119 | * Initializing before CBMEM is available, use static buffer to store |
| 120 | * the log. |
| 121 | */ |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 122 | init_console_ptr(static_console, sizeof(static_console), CBMEMC_RESET); |
Aaron Durbin | 2ad6bd2 | 2013-05-10 00:45:37 -0500 | [diff] [blame] | 123 | #endif |
| 124 | } |
| 125 | |
| 126 | void cbmemc_tx_byte(unsigned char data) |
| 127 | { |
| 128 | struct cbmem_console *cbm_cons_p = current_console(); |
| 129 | u32 cursor; |
| 130 | |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 131 | if (!cbm_cons_p) |
| 132 | return; |
| 133 | |
| 134 | cursor = cbm_cons_p->buffer_cursor++; |
| 135 | if (cursor < cbm_cons_p->buffer_size) |
| 136 | cbm_cons_p->buffer_body[cursor] = data; |
| 137 | } |
| 138 | |
| 139 | /* |
| 140 | * Copy the current console buffer (either from the cache as RAM area, or from |
| 141 | * the static buffer, pointed at by cbmem_console_p) into the CBMEM console |
| 142 | * buffer space (pointed at by new_cons_p), concatenating the copied data with |
| 143 | * the CBMEM console buffer contents. |
| 144 | * |
| 145 | * If there is overflow - add to the destination area a string, reporting the |
Martin Roth | cbf2bd7 | 2013-07-09 21:51:14 -0600 | [diff] [blame] | 146 | * overflow and the number of dropped characters. |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 147 | */ |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 148 | static void copy_console_buffer(struct cbmem_console *old_cons_p, |
| 149 | struct cbmem_console *new_cons_p) |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 150 | { |
Kyösti Mälkki | a3c5ba3 | 2013-11-27 17:51:31 +0200 | [diff] [blame] | 151 | u32 copy_size, dropped_chars; |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 152 | u32 cursor = new_cons_p->buffer_cursor; |
Aaron Durbin | 2ad6bd2 | 2013-05-10 00:45:37 -0500 | [diff] [blame] | 153 | |
Kyösti Mälkki | a3c5ba3 | 2013-11-27 17:51:31 +0200 | [diff] [blame] | 154 | if (old_cons_p->buffer_cursor < old_cons_p->buffer_size) |
| 155 | copy_size = old_cons_p->buffer_cursor; |
| 156 | else |
| 157 | copy_size = old_cons_p->buffer_size; |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 158 | |
Kyösti Mälkki | a3c5ba3 | 2013-11-27 17:51:31 +0200 | [diff] [blame] | 159 | if (cursor > new_cons_p->buffer_size) |
| 160 | copy_size = 0; |
| 161 | else if (cursor + copy_size > new_cons_p->buffer_size) |
| 162 | copy_size = new_cons_p->buffer_size - cursor; |
| 163 | |
| 164 | dropped_chars = old_cons_p->buffer_cursor - copy_size; |
| 165 | if (dropped_chars) { |
| 166 | /* Reserve 80 chars to report overflow, if possible. */ |
| 167 | if (copy_size < 80) |
| 168 | return; |
| 169 | copy_size -= 80; |
| 170 | dropped_chars += 80; |
| 171 | } |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 172 | |
Aaron Durbin | 2ad6bd2 | 2013-05-10 00:45:37 -0500 | [diff] [blame] | 173 | memcpy(new_cons_p->buffer_body + cursor, old_cons_p->buffer_body, |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 174 | copy_size); |
| 175 | |
| 176 | cursor += copy_size; |
| 177 | |
Kyösti Mälkki | a3c5ba3 | 2013-11-27 17:51:31 +0200 | [diff] [blame] | 178 | if (dropped_chars) { |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 179 | const char loss_str1[] = "\n\n*** Log truncated, "; |
| 180 | const char loss_str2[] = " characters dropped. ***\n\n"; |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 181 | |
| 182 | /* |
| 183 | * When running from ROM sprintf is not available, a simple |
| 184 | * itoa implementation is used instead. |
| 185 | */ |
| 186 | int got_first_digit = 0; |
| 187 | |
| 188 | /* Way more than possible number of dropped characters. */ |
| 189 | u32 mult = 100000; |
| 190 | |
| 191 | strcpy((char *)new_cons_p->buffer_body + cursor, loss_str1); |
| 192 | cursor += sizeof(loss_str1) - 1; |
| 193 | |
| 194 | while (mult) { |
| 195 | int digit = dropped_chars / mult; |
| 196 | if (got_first_digit || digit) { |
| 197 | new_cons_p->buffer_body[cursor++] = digit + '0'; |
| 198 | dropped_chars %= mult; |
| 199 | /* Excessive, but keeps it simple */ |
| 200 | got_first_digit = 1; |
| 201 | } |
| 202 | mult /= 10; |
| 203 | } |
| 204 | |
| 205 | strcpy((char *)new_cons_p->buffer_body + cursor, loss_str2); |
| 206 | cursor += sizeof(loss_str2) - 1; |
| 207 | } |
| 208 | new_cons_p->buffer_cursor = cursor; |
| 209 | } |
| 210 | |
Kyösti Mälkki | cbf5bdf | 2013-09-10 00:07:21 +0300 | [diff] [blame] | 211 | void cbmemc_reinit(void) |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 212 | { |
Kyösti Mälkki | 52a2722 | 2013-09-09 01:31:22 +0300 | [diff] [blame] | 213 | struct cbmem_console *cbm_cons_p = NULL; |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 214 | int flags = CBMEMC_APPEND; |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 215 | |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 216 | if (ENV_ROMSTAGE && (CONFIG_CONSOLE_PRERAM_BUFFER_SIZE == 0)) |
Kyösti Mälkki | 71b2145 | 2014-11-28 10:13:03 +0200 | [diff] [blame] | 217 | return; |
Kyösti Mälkki | 71b2145 | 2014-11-28 10:13:03 +0200 | [diff] [blame] | 218 | |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 219 | /* If CBMEM entry already existed, old contents is not altered. */ |
| 220 | cbm_cons_p = cbmem_add(CBMEM_ID_CONSOLE, |
| 221 | CONFIG_CONSOLE_CBMEM_BUFFER_SIZE); |
Kyösti Mälkki | 52a2722 | 2013-09-09 01:31:22 +0300 | [diff] [blame] | 222 | |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 223 | /* Clear old contents of CBMEM buffer. */ |
| 224 | if (ENV_ROMSTAGE || (CONFIG_CONSOLE_PRERAM_BUFFER_SIZE == 0)) |
| 225 | flags |= CBMEMC_RESET; |
Kyösti Mälkki | 52a2722 | 2013-09-09 01:31:22 +0300 | [diff] [blame] | 226 | |
Kyösti Mälkki | 8659e40 | 2014-12-21 08:55:47 +0200 | [diff] [blame] | 227 | init_console_ptr(cbm_cons_p, |
| 228 | CONFIG_CONSOLE_CBMEM_BUFFER_SIZE, flags); |
Vadim Bendebury | 32da8be | 2011-09-29 17:27:15 -0700 | [diff] [blame] | 229 | } |
Kyösti Mälkki | cbf5bdf | 2013-09-10 00:07:21 +0300 | [diff] [blame] | 230 | /* Call cbmemc_reinit() at CAR migration time. */ |
| 231 | CAR_MIGRATE(cbmemc_reinit) |