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