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/* Pactor64 — Raspberry Pi 5 Kernel Main (AArch64) */ |
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#include "uart.h" |
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|
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#define CMD_BUF_SIZE 128 |
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|
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static int kstrcmp(const char *a, const char *b) { |
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while (*a && *a == *b) { a++; b++; } |
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return (unsigned char)*a - (unsigned char)*b; |
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} |
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|
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static void kprintf(const char *fmt, ...) { |
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__builtin_va_list ap; |
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__builtin_va_start(ap, fmt); |
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for (int i = 0; fmt[i]; i++) { |
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if (fmt[i] == '%' && fmt[i+1]) { |
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i++; |
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switch (fmt[i]) { |
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case 'd': { |
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long v = __builtin_va_arg(ap, long); |
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if (v < 0) { uart_putc('-'); v = -v; } |
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char b[21]; int j = 0; |
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if (v == 0) { uart_putc('0'); break; } |
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while (v > 0) { b[j++] = '0' + (v % 10); v /= 10; } |
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while (j > 0) uart_putc(b[--j]); |
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break; |
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} |
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case 's': { |
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const char *s = __builtin_va_arg(ap, const char *); |
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uart_puts(s ? s : "(null)"); |
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break; |
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} |
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case '%': uart_putc('%'); break; |
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default: uart_putc('%'); uart_putc(fmt[i]); break; |
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} |
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} else { |
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uart_putc(fmt[i]); |
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} |
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} |
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__builtin_va_end(ap); |
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} |
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|
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static void cmd_help(void) { |
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uart_puts(" Available commands:\r\n"); |
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uart_puts(" help - Show this help\r\n"); |
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uart_puts(" sysinfo - System information\r\n"); |
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uart_puts(" halt - Halt the system\r\n"); |
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} |
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|
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static void cmd_sysinfo(void) { |
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uart_puts(" ================================\r\n"); |
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uart_puts(" Pactor64 System Information\r\n"); |
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uart_puts(" ================================\r\n"); |
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uart_puts(" Architecture: AArch64 (ARMv8.2-A)\r\n"); |
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uart_puts(" CPU: Cortex-A76\r\n"); |
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uart_puts(" Board: Raspberry Pi 5\r\n"); |
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uart_puts(" SoC: BCM2712\r\n"); |
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uart_puts(" Console: PL011 UART @ 115200 baud\r\n"); |
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uart_puts(" ================================\r\n"); |
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} |
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|
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static void execute_command(const char *cmd) { |
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while (*cmd == ' ') cmd++; |
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if (*cmd == '\0') return; |
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if (kstrcmp(cmd, "help") == 0) cmd_help(); |
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else if (kstrcmp(cmd, "sysinfo") == 0) cmd_sysinfo(); |
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else if (kstrcmp(cmd, "halt") == 0) { |
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uart_puts(" System halted.\r\n"); |
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for (;;) __asm__ volatile("wfe"); |
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} else { |
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kprintf(" Unknown: '%s'\r\n", cmd); |
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} |
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} |
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|
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static void shell_run(void) { |
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char buf[CMD_BUF_SIZE]; |
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int pos = 0; |
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uart_puts("pactor64> "); |
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for (;;) { |
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int c = uart_getc(); |
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if (c < 0) continue; |
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char ch = (char)c; |
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if (ch == '\r' || ch == '\n') { |
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uart_puts("\r\n"); |
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buf[pos] = '\0'; |
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execute_command(buf); |
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pos = 0; |
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uart_puts("pactor64> "); |
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} else if (ch == 0x7F || ch == '\b') { |
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if (pos > 0) { pos--; uart_puts("\b \b"); } |
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} else if (pos < CMD_BUF_SIZE - 1) { |
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buf[pos++] = ch; |
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uart_putc(ch); |
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} |
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} |
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} |
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|
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void kernel_main(void) { |
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uart_puts("\r\n"); |
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uart_puts(" ================================\r\n"); |
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uart_puts(" Pactor64 on Raspberry Pi 5\r\n"); |
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uart_puts(" Cortex A76 (AArch64)\r\n"); |
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uart_puts(" ================================\r\n"); |
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uart_puts("\r\n [OK] Kernel initialized\r\n"); |
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uart_puts(" [OK] UART console ready\r\n"); |
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uart_puts("\r\n Type 'help' for available commands.\r\n\r\n"); |
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shell_run(); |
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} |
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