162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * DECstation PROM-based early console support. 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * Copyright (C) 2004, 2007 Maciej W. Rozycki 662306a36Sopenharmony_ci */ 762306a36Sopenharmony_ci#include <linux/console.h> 862306a36Sopenharmony_ci#include <linux/init.h> 962306a36Sopenharmony_ci#include <linux/kernel.h> 1062306a36Sopenharmony_ci#include <linux/string.h> 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ci#include <asm/dec/prom.h> 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_cistatic void __init prom_console_write(struct console *con, const char *s, 1562306a36Sopenharmony_ci unsigned int c) 1662306a36Sopenharmony_ci{ 1762306a36Sopenharmony_ci char buf[81]; 1862306a36Sopenharmony_ci unsigned int chunk = sizeof(buf) - 1; 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ci while (c > 0) { 2162306a36Sopenharmony_ci if (chunk > c) 2262306a36Sopenharmony_ci chunk = c; 2362306a36Sopenharmony_ci memcpy(buf, s, chunk); 2462306a36Sopenharmony_ci buf[chunk] = '\0'; 2562306a36Sopenharmony_ci prom_printf("%s", buf); 2662306a36Sopenharmony_ci s += chunk; 2762306a36Sopenharmony_ci c -= chunk; 2862306a36Sopenharmony_ci } 2962306a36Sopenharmony_ci} 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_cistatic struct console promcons __initdata = { 3262306a36Sopenharmony_ci .name = "prom", 3362306a36Sopenharmony_ci .write = prom_console_write, 3462306a36Sopenharmony_ci .flags = CON_BOOT | CON_PRINTBUFFER, 3562306a36Sopenharmony_ci .index = -1, 3662306a36Sopenharmony_ci}; 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_civoid __init register_prom_console(void) 3962306a36Sopenharmony_ci{ 4062306a36Sopenharmony_ci register_console(&promcons); 4162306a36Sopenharmony_ci} 42