ARM: OMAP: Map SRAM later on with ioremap_exec()
[linux-2.6.git] / arch / arm / mach-omap1 / io.c
1 /*
2  * linux/arch/arm/mach-omap1/io.c
3  *
4  * OMAP1 I/O mapping code
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 version 2 as
8  * published by the Free Software Foundation.
9  */
10
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/io.h>
15
16 #include <asm/tlb.h>
17 #include <asm/mach/map.h>
18 #include <plat/mux.h>
19 #include <plat/tc.h>
20
21 #include "clock.h"
22
23 extern void omap_check_revision(void);
24
25 /*
26  * The machine specific code may provide the extra mapping besides the
27  * default mapping provided here.
28  */
29 static struct map_desc omap_io_desc[] __initdata = {
30         {
31                 .virtual        = OMAP1_IO_VIRT,
32                 .pfn            = __phys_to_pfn(OMAP1_IO_PHYS),
33                 .length         = OMAP1_IO_SIZE,
34                 .type           = MT_DEVICE
35         }
36 };
37
38 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
39 static struct map_desc omap7xx_io_desc[] __initdata = {
40         {
41                 .virtual        = OMAP7XX_DSP_BASE,
42                 .pfn            = __phys_to_pfn(OMAP7XX_DSP_START),
43                 .length         = OMAP7XX_DSP_SIZE,
44                 .type           = MT_DEVICE
45         }, {
46                 .virtual        = OMAP7XX_DSPREG_BASE,
47                 .pfn            = __phys_to_pfn(OMAP7XX_DSPREG_START),
48                 .length         = OMAP7XX_DSPREG_SIZE,
49                 .type           = MT_DEVICE
50         }
51 };
52 #endif
53
54 #ifdef CONFIG_ARCH_OMAP15XX
55 static struct map_desc omap1510_io_desc[] __initdata = {
56         {
57                 .virtual        = OMAP1510_DSP_BASE,
58                 .pfn            = __phys_to_pfn(OMAP1510_DSP_START),
59                 .length         = OMAP1510_DSP_SIZE,
60                 .type           = MT_DEVICE
61         }, {
62                 .virtual        = OMAP1510_DSPREG_BASE,
63                 .pfn            = __phys_to_pfn(OMAP1510_DSPREG_START),
64                 .length         = OMAP1510_DSPREG_SIZE,
65                 .type           = MT_DEVICE
66         }
67 };
68 #endif
69
70 #if defined(CONFIG_ARCH_OMAP16XX)
71 static struct map_desc omap16xx_io_desc[] __initdata = {
72         {
73                 .virtual        = OMAP16XX_DSP_BASE,
74                 .pfn            = __phys_to_pfn(OMAP16XX_DSP_START),
75                 .length         = OMAP16XX_DSP_SIZE,
76                 .type           = MT_DEVICE
77         }, {
78                 .virtual        = OMAP16XX_DSPREG_BASE,
79                 .pfn            = __phys_to_pfn(OMAP16XX_DSPREG_START),
80                 .length         = OMAP16XX_DSPREG_SIZE,
81                 .type           = MT_DEVICE
82         }
83 };
84 #endif
85
86 /*
87  * Maps common IO regions for omap1
88  */
89 static void __init omap1_map_common_io(void)
90 {
91         iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
92 }
93
94 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
95 void __init omap7xx_map_io(void)
96 {
97         omap1_map_common_io();
98         iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc));
99 }
100 #endif
101
102 #ifdef CONFIG_ARCH_OMAP15XX
103 void __init omap15xx_map_io(void)
104 {
105         omap1_map_common_io();
106         iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
107 }
108 #endif
109
110 #if defined(CONFIG_ARCH_OMAP16XX)
111 void __init omap16xx_map_io(void)
112 {
113         omap1_map_common_io();
114         iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
115 }
116 #endif
117
118 /*
119  * Common low-level hardware init for omap1.
120  */
121 void omap1_init_early(void)
122 {
123         omap_check_revision();
124
125         /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
126          * on a Posted Write in the TIPB Bridge".
127          */
128         omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
129         omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
130
131         /* Must init clocks early to assure that timer interrupt works
132          */
133         omap1_clk_init();
134         omap1_mux_init();
135 }
136
137 /*
138  * NOTE: Please use ioremap + __raw_read/write where possible instead of these
139  */
140
141 u8 omap_readb(u32 pa)
142 {
143         return __raw_readb(OMAP1_IO_ADDRESS(pa));
144 }
145 EXPORT_SYMBOL(omap_readb);
146
147 u16 omap_readw(u32 pa)
148 {
149         return __raw_readw(OMAP1_IO_ADDRESS(pa));
150 }
151 EXPORT_SYMBOL(omap_readw);
152
153 u32 omap_readl(u32 pa)
154 {
155         return __raw_readl(OMAP1_IO_ADDRESS(pa));
156 }
157 EXPORT_SYMBOL(omap_readl);
158
159 void omap_writeb(u8 v, u32 pa)
160 {
161         __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
162 }
163 EXPORT_SYMBOL(omap_writeb);
164
165 void omap_writew(u16 v, u32 pa)
166 {
167         __raw_writew(v, OMAP1_IO_ADDRESS(pa));
168 }
169 EXPORT_SYMBOL(omap_writew);
170
171 void omap_writel(u32 v, u32 pa)
172 {
173         __raw_writel(v, OMAP1_IO_ADDRESS(pa));
174 }
175 EXPORT_SYMBOL(omap_writel);