| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| /* |
| * blatantly copied from linux/kernel/printk.c |
| */ |
| |
| #include <console/cbmem_console.h> |
| #include <console/console.h> |
| #include <console/streams.h> |
| #include <console/vtxprintf.h> |
| #include <smp/spinlock.h> |
| #include <smp/node.h> |
| #include <stddef.h> |
| #include <trace.h> |
| #include <timer.h> |
| |
| DECLARE_SPIN_LOCK(console_lock) |
| |
| #define TRACK_CONSOLE_TIME (!ENV_SMM && CONFIG(HAVE_MONOTONIC_TIMER)) |
| |
| static struct mono_time mt_start, mt_stop; |
| static long console_usecs; |
| |
| static void console_time_run(void) |
| { |
| if (TRACK_CONSOLE_TIME && boot_cpu()) |
| timer_monotonic_get(&mt_start); |
| } |
| |
| static void console_time_stop(void) |
| { |
| if (TRACK_CONSOLE_TIME && boot_cpu()) { |
| timer_monotonic_get(&mt_stop); |
| console_usecs += mono_time_diff_microseconds(&mt_start, &mt_stop); |
| } |
| } |
| |
| void console_time_report(void) |
| { |
| if (!TRACK_CONSOLE_TIME) |
| return; |
| |
| printk(BIOS_DEBUG, "BS: " ENV_STRING " times (exec / console): total (unknown) / %ld ms\n", |
| DIV_ROUND_CLOSEST(console_usecs, USECS_PER_MSEC)); |
| } |
| |
| long console_time_get_and_reset(void) |
| { |
| if (!TRACK_CONSOLE_TIME) |
| return 0; |
| |
| long elapsed = console_usecs; |
| console_usecs = 0; |
| return elapsed; |
| } |
| |
| void do_putchar(unsigned char byte) |
| { |
| console_time_run(); |
| console_tx_byte(byte); |
| console_time_stop(); |
| } |
| |
| static void wrap_putchar(unsigned char byte, void *data) |
| { |
| console_tx_byte(byte); |
| } |
| |
| static void wrap_putchar_cbmemc(unsigned char byte, void *data) |
| { |
| __cbmemc_tx_byte(byte); |
| } |
| |
| int do_vprintk(int msg_level, const char *fmt, va_list args) |
| { |
| int i, log_this; |
| |
| if (CONFIG(SQUELCH_EARLY_SMP) && ENV_ROMSTAGE_OR_BEFORE && !boot_cpu()) |
| return 0; |
| |
| log_this = console_log_level(msg_level); |
| if (log_this < CONSOLE_LOG_FAST) |
| return 0; |
| |
| DISABLE_TRACE; |
| spin_lock(&console_lock); |
| |
| console_time_run(); |
| |
| if (log_this == CONSOLE_LOG_FAST) { |
| i = vtxprintf(wrap_putchar_cbmemc, fmt, args, NULL); |
| } else { |
| i = vtxprintf(wrap_putchar, fmt, args, NULL); |
| console_tx_flush(); |
| } |
| |
| console_time_stop(); |
| |
| spin_unlock(&console_lock); |
| ENABLE_TRACE; |
| |
| return i; |
| } |
| |
| int do_printk(int msg_level, const char *fmt, ...) |
| { |
| va_list args; |
| int i; |
| |
| va_start(args, fmt); |
| i = do_vprintk(msg_level, fmt, args); |
| va_end(args); |
| |
| return i; |
| } |