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1da177e4 LT |
1 | /* |
2 | * init.c, Common initialization routines for NEC VR4100 series. | |
3 | * | |
29ce2c76 | 4 | * Copyright (C) 2003-2005 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> |
1da177e4 LT |
5 | * |
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. | |
10 | * | |
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. | |
15 | * | |
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 | |
19 | */ | |
20 | #include <linux/init.h> | |
21 | #include <linux/ioport.h> | |
22 | #include <linux/irq.h> | |
23 | #include <linux/string.h> | |
24 | ||
25 | #include <asm/bootinfo.h> | |
26 | #include <asm/time.h> | |
27 | #include <asm/vr41xx/vr41xx.h> | |
28 | ||
29 | #define IO_MEM_RESOURCE_START 0UL | |
30 | #define IO_MEM_RESOURCE_END 0x1fffffffUL | |
31 | ||
32 | static void __init iomem_resource_init(void) | |
33 | { | |
34 | iomem_resource.start = IO_MEM_RESOURCE_START; | |
35 | iomem_resource.end = IO_MEM_RESOURCE_END; | |
36 | } | |
37 | ||
38 | static void __init setup_timer_frequency(void) | |
39 | { | |
40 | unsigned long tclock; | |
41 | ||
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; | |
46 | else | |
47 | mips_hpt_frequency = tclock / 4; | |
48 | } | |
49 | ||
50 | static void __init setup_timer_irq(struct irqaction *irq) | |
51 | { | |
52 | setup_irq(TIMER_IRQ, irq); | |
53 | } | |
54 | ||
55 | static void __init timer_init(void) | |
56 | { | |
57 | board_time_init = setup_timer_frequency; | |
58 | board_timer_setup = setup_timer_irq; | |
59 | } | |
60 | ||
2925aba4 | 61 | void __init plat_mem_setup(void) |
c83cfc9c RB |
62 | { |
63 | vr41xx_calculate_clock_frequency(); | |
64 | ||
65 | timer_init(); | |
66 | iomem_resource_init(); | |
67 | } | |
68 | ||
1da177e4 LT |
69 | void __init prom_init(void) |
70 | { | |
71 | int argc, i; | |
72 | char **argv; | |
73 | ||
74 | argc = fw_arg0; | |
75 | argv = (char **)fw_arg1; | |
76 | ||
77 | for (i = 1; i < argc; i++) { | |
78 | strcat(arcs_cmdline, argv[i]); | |
79 | if (i < (argc - 1)) | |
80 | strcat(arcs_cmdline, " "); | |
81 | } | |
1da177e4 LT |
82 | } |
83 | ||
84 | unsigned long __init prom_free_prom_memory (void) | |
85 | { | |
86 | return 0UL; | |
87 | } |