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2026-05-07 02:22:25 +03:00
commit 1a9fd27a31
226 changed files with 29188 additions and 0 deletions
@@ -0,0 +1,93 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <sys/cervus.h>
+#include <cervus_util.h>
+
+static const char *logo[] = {
+    "    L          ",
+    "   'k.i ,      ",
+    "    \";\"+U.,    ",
+    "       \\_' -.  ",
+    "      .f  ,_.;.",
+    "      I ,f     ",
+    "       '       ",
+    NULL
+};
+
+static void cpuid_leaf(uint32_t leaf, uint32_t *a, uint32_t *b,
+                       uint32_t *c, uint32_t *d)
+{
+    asm volatile ("cpuid"
+                  : "=a"(*a), "=b"(*b), "=c"(*c), "=d"(*d)
+                  : "0"(leaf), "2"(0));
+}
+
+static void print_uptime(void)
+{
+    uint64_t ns      = cervus_uptime_ns();
+    uint64_t total_s = ns / 1000000000ULL;
+    uint64_t ms      = (ns / 1000000ULL) % 1000ULL;
+    uint64_t secs    = total_s % 60;
+    uint64_t mins    = (total_s / 60) % 60;
+    uint64_t hours   = (total_s / 3600) % 24;
+    uint64_t days    = total_s / 86400;
+    fputs("uptime: ", stdout);
+    if (days > 0) printf("%lud, ", (unsigned long)days);
+    printf("%02lu:%02lu:%02lu  (%lus %lums)",
+           (unsigned long)hours, (unsigned long)mins, (unsigned long)secs,
+           (unsigned long)total_s, (unsigned long)ms);
+}
+
+static void print_cpu(void)
+{
+    uint32_t a, b, c, d;
+    cpuid_leaf(0x80000000, &a, &b, &c, &d);
+    if (a >= 0x80000004) {
+        char brand[49];
+        uint32_t *p = (uint32_t *)brand;
+        cpuid_leaf(0x80000002, &p[0], &p[1], &p[2],  &p[3]);
+        cpuid_leaf(0x80000003, &p[4], &p[5], &p[6],  &p[7]);
+        cpuid_leaf(0x80000004, &p[8], &p[9], &p[10], &p[11]);
+        brand[48] = '\0';
+        const char *br = brand;
+        while (*br == ' ') br++;
+        printf("cpu: %s", br);
+    }
+}
+
+static void print_mem(void)
+{
+    cervus_meminfo_t mi;
+    if (cervus_meminfo(&mi) != 0) return;
+    uint64_t used  = mi.used_bytes;
+    uint64_t total = mi.total_bytes;
+    const uint64_t MiB = 1024ULL * 1024;
+    const uint64_t GiB = 1024ULL * 1024 * 1024;
+    fputs("mem: ", stdout);
+    if (total >= GiB)
+        printf("%lu.%02lu / %lu.%02lu GiB",
+               (unsigned long)(used / GiB),  (unsigned long)((used  % GiB) * 100 / GiB),
+               (unsigned long)(total / GiB), (unsigned long)((total % GiB) * 100 / GiB));
+    else
+        printf("%lu / %lu MiB",
+               (unsigned long)(used / MiB), (unsigned long)(total / MiB));
+}
+
+int main(int argc, char **argv)
+{
+    (void)argc; (void)argv;
+    putchar('\n');
+    for (int i = 0; logo[i]; i++) {
+        printf(" %s  ", logo[i]);
+        switch (i) {
+            case 1: fputs("os: Cervus OS", stdout);     break;
+            case 2: print_uptime();                     break;
+            case 3: print_cpu();                        break;
+            case 4: fputs(C_RESET "shell: CSH", stdout); break;
+            case 5: print_mem();                        break;
+        }
+        putchar('\n');
+    }
+    putchar('\n');
+    return 0;
+}