2 * init.c, Common initialization routines for NEC VR4100 series.
4 * Copyright (C) 2003-2005 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/init.h>
21 #include <linux/ioport.h>
22 #include <linux/irq.h>
23 #include <linux/string.h>
25 #include <asm/bootinfo.h>
27 #include <asm/vr41xx/vr41xx.h>
29 #define IO_MEM_RESOURCE_START 0UL
30 #define IO_MEM_RESOURCE_END 0x1fffffffUL
32 static void __init iomem_resource_init(void)
34 iomem_resource.start = IO_MEM_RESOURCE_START;
35 iomem_resource.end = IO_MEM_RESOURCE_END;
38 static void __init setup_timer_frequency(void)
42 tclock = vr41xx_get_tclock_frequency();
43 if (current_cpu_data.processor_id == PRID_VR4131_REV2_0 ||
44 current_cpu_data.processor_id == PRID_VR4131_REV2_1)
45 mips_hpt_frequency = tclock / 2;
47 mips_hpt_frequency = tclock / 4;
50 static void __init setup_timer_irq(struct irqaction *irq)
52 setup_irq(TIMER_IRQ, irq);
55 static void __init timer_init(void)
57 board_time_init = setup_timer_frequency;
58 board_timer_setup = setup_timer_irq;
61 void __init plat_setup(void)
63 vr41xx_calculate_clock_frequency();
66 iomem_resource_init();
69 void __init prom_init(void)
75 argv = (char **)fw_arg1;
77 for (i = 1; i < argc; i++) {
78 strcat(arcs_cmdline, argv[i]);
80 strcat(arcs_cmdline, " ");
84 unsigned long __init prom_free_prom_memory (void)