Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 1 | /* |
| 2 | * U-boot - io.h IO routines |
| 3 | * |
Aubrey Li | 314d22f | 2007-04-05 18:31:18 +0800 | [diff] [blame] | 4 | * Copyright (c) 2005-2007 Analog Devices Inc. |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 5 | * |
| 6 | * See file CREDITS for list of people who contributed to this |
| 7 | * project. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License as |
| 11 | * published by the Free Software Foundation; either version 2 of |
| 12 | * the License, or (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
Aubrey Li | 314d22f | 2007-04-05 18:31:18 +0800 | [diff] [blame] | 21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, |
| 22 | * MA 02110-1301 USA |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 23 | */ |
| 24 | |
| 25 | #ifndef _BLACKFIN_IO_H |
| 26 | #define _BLACKFIN_IO_H |
| 27 | |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 28 | #ifdef __KERNEL__ |
| 29 | |
Mike Frysinger | 66c4cf4 | 2008-02-04 19:26:55 -0500 | [diff] [blame] | 30 | #include <asm/blackfin.h> |
| 31 | |
| 32 | static inline void sync(void) |
| 33 | { |
| 34 | SSYNC(); |
| 35 | } |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 36 | |
| 37 | /* function prototypes for CF support */ |
| 38 | extern void cf_outsw(unsigned short *addr, unsigned short *sect_buf, int words); |
| 39 | extern void cf_insw(unsigned short *sect_buf, unsigned short *addr, int words); |
| 40 | extern unsigned char cf_inb(volatile unsigned char *addr); |
Aubrey.Li | 9da597f | 2007-03-09 13:38:44 +0800 | [diff] [blame] | 41 | extern void cf_outb(unsigned char val, volatile unsigned char *addr); |
| 42 | |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 43 | /* |
Haavard Skinnemoen | f985551 | 2007-12-13 12:56:33 +0100 | [diff] [blame] | 44 | * Given a physical address and a length, return a virtual address |
| 45 | * that can be used to access the memory range with the caching |
| 46 | * properties specified by "flags". |
| 47 | */ |
| 48 | typedef unsigned long phys_addr_t; |
| 49 | |
| 50 | #define MAP_NOCACHE (0) |
| 51 | #define MAP_WRCOMBINE (0) |
| 52 | #define MAP_WRBACK (0) |
| 53 | #define MAP_WRTHROUGH (0) |
| 54 | |
| 55 | static inline void * |
| 56 | map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) |
| 57 | { |
| 58 | return (void *)paddr; |
| 59 | } |
| 60 | |
| 61 | /* |
| 62 | * Take down a mapping set up by map_physmem(). |
| 63 | */ |
| 64 | static inline void unmap_physmem(void *vaddr, unsigned long flags) |
| 65 | { |
| 66 | |
| 67 | } |
| 68 | |
| 69 | /* |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 70 | * These are for ISA/PCI shared memory _only_ and should never be used |
| 71 | * on any other type of memory, including Zorro memory. They are meant to |
| 72 | * access the bus in the bus byte order which is little-endian!. |
| 73 | * |
| 74 | * readX/writeX() are used to access memory mapped devices. On some |
| 75 | * architectures the memory mapped IO stuff needs to be accessed |
| 76 | * differently. On the m68k architecture, we just read/write the |
| 77 | * memory location directly. |
| 78 | */ |
| 79 | |
Mike Frysinger | 66c4cf4 | 2008-02-04 19:26:55 -0500 | [diff] [blame] | 80 | #ifndef __ASSEMBLY__ |
| 81 | |
| 82 | static inline unsigned char readb(const volatile void *addr) |
| 83 | { |
| 84 | unsigned int val; |
| 85 | int tmp; |
| 86 | |
| 87 | __asm__ __volatile__ ("cli %1;\n\t" |
| 88 | "NOP; NOP; SSYNC;\n\t" |
| 89 | "%0 = b [%2] (z);\n\t" |
| 90 | "sti %1;\n\t" |
| 91 | : "=d"(val), "=d"(tmp): "a"(addr)); |
| 92 | |
| 93 | return (unsigned char) val; |
| 94 | } |
| 95 | |
| 96 | static inline unsigned short readw(const volatile void *addr) |
| 97 | { |
| 98 | unsigned int val; |
| 99 | int tmp; |
| 100 | |
| 101 | __asm__ __volatile__ ("cli %1;\n\t" |
| 102 | "NOP; NOP; SSYNC;\n\t" |
| 103 | "%0 = w [%2] (z);\n\t" |
| 104 | "sti %1;\n\t" |
| 105 | : "=d"(val), "=d"(tmp): "a"(addr)); |
| 106 | |
| 107 | return (unsigned short) val; |
| 108 | } |
| 109 | |
| 110 | static inline unsigned int readl(const volatile void *addr) |
| 111 | { |
| 112 | unsigned int val; |
| 113 | int tmp; |
| 114 | |
| 115 | __asm__ __volatile__ ("cli %1;\n\t" |
| 116 | "NOP; NOP; SSYNC;\n\t" |
| 117 | "%0 = [%2];\n\t" |
| 118 | "sti %1;\n\t" |
| 119 | : "=d"(val), "=d"(tmp): "a"(addr)); |
| 120 | return val; |
| 121 | } |
| 122 | |
Mike Frysinger | e9e1aa9 | 2008-02-04 19:26:54 -0500 | [diff] [blame] | 123 | #define __raw_readb readb |
| 124 | #define __raw_readw readw |
| 125 | #define __raw_readl readl |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 126 | |
Mike Frysinger | 66c4cf4 | 2008-02-04 19:26:55 -0500 | [diff] [blame] | 127 | #endif /* __ASSEMBLY__ */ |
| 128 | |
| 129 | #define writeb(b, addr) (void)((*(volatile unsigned char *) (addr)) = (b)) |
| 130 | #define writew(b, addr) (void)((*(volatile unsigned short *) (addr)) = (b)) |
| 131 | #define writel(b, addr) (void)((*(volatile unsigned int *) (addr)) = (b)) |
Mike Frysinger | e9e1aa9 | 2008-02-04 19:26:54 -0500 | [diff] [blame] | 132 | #define __raw_writeb writeb |
| 133 | #define __raw_writew writew |
| 134 | #define __raw_writel writel |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 135 | |
Mike Frysinger | 66c4cf4 | 2008-02-04 19:26:55 -0500 | [diff] [blame] | 136 | #define memset_io(a, b, c) memset((void *)(a), (b), (c)) |
| 137 | #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c)) |
| 138 | #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c)) |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 139 | |
Mike Frysinger | 66c4cf4 | 2008-02-04 19:26:55 -0500 | [diff] [blame] | 140 | #define inb(addr) cf_inb((volatile unsigned char *)(addr)) |
| 141 | #define outb(x, addr) cf_outb((unsigned char)(x), (volatile unsigned char *)(addr)) |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 142 | |
Mike Frysinger | 66c4cf4 | 2008-02-04 19:26:55 -0500 | [diff] [blame] | 143 | #define insw(port, addr, count) cf_insw((unsigned short *)addr, (unsigned short *)(port), (count)) |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 144 | |
Mike Frysinger | 66c4cf4 | 2008-02-04 19:26:55 -0500 | [diff] [blame] | 145 | #define outsw(port, addr, count) cf_outsw((unsigned short *)(port), (unsigned short *)addr, (count)) |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 146 | |
| 147 | #define IO_SPACE_LIMIT 0xffff |
| 148 | |
| 149 | /* Values for nocacheflag and cmode */ |
| 150 | #define IOMAP_FULL_CACHING 0 |
| 151 | #define IOMAP_NOCACHE_SER 1 |
| 152 | #define IOMAP_NOCACHE_NONSER 2 |
| 153 | #define IOMAP_WRITETHROUGH 3 |
| 154 | |
| 155 | extern void *__ioremap(unsigned long physaddr, unsigned long size, |
| 156 | int cacheflag); |
| 157 | extern void __iounmap(void *addr, unsigned long size); |
| 158 | |
| 159 | extern inline void *ioremap(unsigned long physaddr, unsigned long size) |
| 160 | { |
| 161 | return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); |
| 162 | } |
Aubrey.Li | 9da597f | 2007-03-09 13:38:44 +0800 | [diff] [blame] | 163 | extern inline void *ioremap_nocache(unsigned long physaddr, unsigned long size) |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 164 | { |
| 165 | return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); |
| 166 | } |
| 167 | extern inline void *ioremap_writethrough(unsigned long physaddr, |
| 168 | unsigned long size) |
| 169 | { |
| 170 | return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); |
| 171 | } |
| 172 | extern inline void *ioremap_fullcache(unsigned long physaddr, |
| 173 | unsigned long size) |
| 174 | { |
| 175 | return __ioremap(physaddr, size, IOMAP_FULL_CACHING); |
| 176 | } |
| 177 | |
| 178 | extern void iounmap(void *addr); |
| 179 | |
| 180 | extern void blkfin_inv_cache_all(void); |
Mike Frysinger | 66c4cf4 | 2008-02-04 19:26:55 -0500 | [diff] [blame] | 181 | #define dma_cache_inv(_start, _size) do { blkfin_inv_cache_all(); } while (0) |
| 182 | #define dma_cache_wback(_start, _size) do { } while (0) |
| 183 | #define dma_cache_wback_inv(_start, _size) do { blkfin_inv_cache_all(); } while (0) |
Wolfgang Denk | 97caf67 | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 184 | |
| 185 | #endif |
| 186 | #endif |