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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* 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 <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();
}
union log_state {
void *as_ptr;
struct {
uint8_t level;
uint8_t speed;
};
};
#define LOG_FAST(state) (HAS_ONLY_FAST_CONSOLES || ((state).speed == CONSOLE_LOG_FAST))
static void wrap_interactive_printf(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vtxprintf(console_interactive_tx_byte, fmt, args, NULL);
va_end(args);
}
static void line_start(union log_state state)
{
if (state.level > BIOS_LOG_PREFIX_MAX_LEVEL)
return;
/* Stored consoles just get a single control char marker to save space. If we are in
LOG_FAST mode, just write the marker to CBMC and exit -- the rest of this function
implements the LOG_ALL case. */
unsigned char marker = BIOS_LOG_LEVEL_TO_MARKER(state.level);
if (LOG_FAST(state)) {
__cbmemc_tx_byte(marker);
return;
}
console_stored_tx_byte(marker, NULL);
/* Interactive consoles get a `[DEBUG] ` style readable prefix,
and potentially an escape sequence for highlighting. */
if (CONFIG(CONSOLE_USE_ANSI_ESCAPES))
wrap_interactive_printf(BIOS_LOG_ESCAPE_PATTERN, bios_log_escape[state.level]);
if (CONFIG(CONSOLE_USE_LOGLEVEL_PREFIX))
wrap_interactive_printf(BIOS_LOG_PREFIX_PATTERN, bios_log_prefix[state.level]);
}
static void line_end(union log_state state)
{
if (CONFIG(CONSOLE_USE_ANSI_ESCAPES) && !LOG_FAST(state))
wrap_interactive_printf(BIOS_LOG_ESCAPE_RESET);
}
static void wrap_putchar(unsigned char byte, void *data)
{
union log_state state = { .as_ptr = data };
static bool line_started = false;
if (byte == '\n') {
line_end(state);
line_started = false;
} else if (!line_started) {
line_start(state);
line_started = true;
}
if (LOG_FAST(state))
__cbmemc_tx_byte(byte);
else
console_tx_byte(byte);
}
int vprintk(int msg_level, const char *fmt, va_list args)
{
union log_state state = { .level = msg_level };
int i;
if (CONFIG(SQUELCH_EARLY_SMP) && ENV_ROMSTAGE_OR_BEFORE && !boot_cpu())
return 0;
state.speed = console_log_level(msg_level);
if (state.speed < CONSOLE_LOG_FAST)
return 0;
spin_lock(&console_lock);
console_time_run();
i = vtxprintf(wrap_putchar, fmt, args, state.as_ptr);
if (LOG_FAST(state))
console_tx_flush();
console_time_stop();
spin_unlock(&console_lock);
return i;
}
int printk(int msg_level, const char *fmt, ...)
{
va_list args;
int i;
va_start(args, fmt);
i = vprintk(msg_level, fmt, args);
va_end(args);
return i;
}
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