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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Copyright (C) 2026 Richard Qin */
/*
* Kernel Panic — minimal fatal error handler.
*
* Before console_init(): silent death (no UART).
* After console_init(): prints message then halts.
*
* Reference: docs/specs/global_init.md §6
*/
#include <lume/types.h>
#include <arch/cpu.h>
// Minimal direct UART output (same as main.cc early boot)
// This can be used by other early-boot code before console_init()
constexpr uint64 kUart0VA = 0x10000000UL + 0xFFFFFFC000000000ULL;
extern "C" void early_putc(char c) {
volatile auto* uart = reinterpret_cast<volatile uint8*>(kUart0VA);
*uart = static_cast<uint8>(c);
}
extern "C" void early_puts(const char* s) {
while (*s) early_putc(*s++);
}
extern "C" [[noreturn]] void kernel_panic(const char* msg, const char* detail) {
arch::cpu::intr_off();
early_puts("\n*** KERNEL PANIC: ");
if (msg) {
early_puts(msg);
}
if (detail) {
early_puts(": ");
early_puts(detail);
}
early_puts(" ***\n");
while (true) {
arch::cpu::halt_until_interrupt();
}
}
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