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#include <sys/stddef.h>
#include <sys/log.h>
void stub(char c) {
(void)c;
}
__attribute__((section(".ringbuf"), aligned(64)))
volatile char log_ring[RINGBUF_SIZE];
static int pos = 0;
static console_callback_t console_callback = stub;
void put_char(char c) {
log_ring[pos++] = c;
if (pos >= RINGBUF_SIZE)
pos = 0;
console_callback(c);
}
void put_string(const char *s) {
while (*s)
put_char(*s++);
}
void register_console_callback(console_callback_t callback) {
console_callback = callback;
}
void put_uint(unsigned int value, unsigned int radix) {
char tmp[16];
const char digits[] = "0123456789abcdef";
int i = 0;
if (value == 0) {
put_char('0');
return;
}
while (value) {
tmp[i++] = digits[value % radix];
value /= radix;
}
while (i--)
put_char(tmp[i]);
}
void put_ptr(uintptr_t value) {
char tmp[16];
const char digits[] = "0123456789abcdef";
int i = 0;
if (value == 0) {
put_char('0');
return;
}
while (value) {
tmp[i++] = digits[value % 16];
value /= 16;
}
put_char('0');
put_char('x');
while (i--)
put_char(tmp[i]);
}
void put_int(int value) {
if (value < 0) {
put_char('-');
put_uint((unsigned int)(-value), 10);
} else {
put_uint((unsigned int)value, 10);
}
}
void vprintk(const char *fmt, __builtin_va_list args) {
while (*fmt) {
if (*fmt != '%') {
put_char(*fmt++);
continue;
}
fmt++;
switch (*fmt) {
case '%':
put_char('%');
break;
case 'c':
put_char((char)__builtin_va_arg(args, int));
break;
case 's':
put_string(__builtin_va_arg(args, const char *));
break;
case 'd':
case 'i':
put_int(__builtin_va_arg(args, int));
break;
case 'u':
put_uint(__builtin_va_arg(args, unsigned int), 10);
break;
case 'x':
put_uint(__builtin_va_arg(args, unsigned int), 16);
break;
case 'p':
put_ptr(__builtin_va_arg(args, uintptr_t));
break;
default:
put_char('%');
put_char(*fmt);
break;
}
fmt++;
}
}
void printk(const char *fmt, ...) {
__builtin_va_list args;
__builtin_va_start(args, fmt);
vprintk(fmt, args);
__builtin_va_end(args);
}
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