初始化

clks/kernel/log.c

@@ -0,0 +1,96 @@
+#include <clks/log.h>
+#include <clks/serial.h>
+#include <clks/tty.h>
+#include <clks/types.h>
+
+#define CLKS_LOG_LINE_MAX 256
+
+static const char *clks_log_level_name(enum clks_log_level level) {
+    switch (level) {
+        case CLKS_LOG_DEBUG:
+            return "DEBUG";
+        case CLKS_LOG_INFO:
+            return "INFO";
+        case CLKS_LOG_WARN:
+            return "WARN";
+        case CLKS_LOG_ERROR:
+            return "ERROR";
+        default:
+            return "UNK";
+    }
+}
+
+static void clks_log_append_char(char *buffer, usize *cursor, char ch) {
+    if (*cursor >= (CLKS_LOG_LINE_MAX - 1)) {
+        return;
+    }
+
+    buffer[*cursor] = ch;
+    (*cursor)++;
+}
+
+static void clks_log_append_text(char *buffer, usize *cursor, const char *text) {
+    usize i = 0;
+
+    while (text[i] != '\0') {
+        clks_log_append_char(buffer, cursor, text[i]);
+        i++;
+    }
+}
+
+static void clks_log_append_hex_u64(char *buffer, usize *cursor, u64 value) {
+    int nibble;
+
+    clks_log_append_text(buffer, cursor, "0X");
+
+    for (nibble = 15; nibble >= 0; nibble--) {
+        u8 current = (u8)((value >> (nibble * 4)) & 0x0FULL);
+        char out = (current < 10) ? (char)('0' + current) : (char)('A' + (current - 10));
+        clks_log_append_char(buffer, cursor, out);
+    }
+}
+
+static void clks_log_emit_line(const char *line) {
+    clks_serial_write(line);
+    clks_serial_write("\n");
+
+    clks_tty_write(line);
+    clks_tty_write("\n");
+}
+
+void clks_log(enum clks_log_level level, const char *tag, const char *message) {
+    char line[CLKS_LOG_LINE_MAX];
+    usize cursor = 0;
+
+    clks_log_append_char(line, &cursor, '[');
+    clks_log_append_text(line, &cursor, clks_log_level_name(level));
+    clks_log_append_char(line, &cursor, ']');
+    clks_log_append_char(line, &cursor, '[');
+    clks_log_append_text(line, &cursor, tag);
+    clks_log_append_char(line, &cursor, ']');
+    clks_log_append_char(line, &cursor, ' ');
+    clks_log_append_text(line, &cursor, message);
+    line[cursor] = '\0';
+
+    clks_log_emit_line(line);
+}
+
+void clks_log_hex(enum clks_log_level level, const char *tag, const char *label, u64 value) {
+    char line[CLKS_LOG_LINE_MAX];
+    usize cursor = 0;
+
+    clks_log_append_char(line, &cursor, '[');
+    clks_log_append_text(line, &cursor, clks_log_level_name(level));
+    clks_log_append_char(line, &cursor, ']');
+    clks_log_append_char(line, &cursor, '[');
+    clks_log_append_text(line, &cursor, tag);
+    clks_log_append_char(line, &cursor, ']');
+    clks_log_append_char(line, &cursor, ' ');
+    clks_log_append_text(line, &cursor, label);
+    clks_log_append_char(line, &cursor, ':');
+    clks_log_append_char(line, &cursor, ' ');
+    clks_log_append_hex_u64(line, &cursor, value);
+    line[cursor] = '\0';
+
+    clks_log_emit_line(line);
+}