Wolfgang Denk | 6cb142f | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 1 | /* |
| 2 | * U-boot - io.h IO routines |
| 3 | * |
Aubrey Li | 155fd76 | 2007-04-05 18:31:18 +0800 | [diff] [blame] | 4 | * Copyright (c) 2005-2007 Analog Devices Inc. |
Wolfgang Denk | 6cb142f | 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 | 155fd76 | 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 | 6cb142f | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 23 | */ |
| 24 | |
| 25 | #ifndef _BLACKFIN_IO_H |
| 26 | #define _BLACKFIN_IO_H |
| 27 | |
Wolfgang Denk | 6cb142f | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 28 | #ifdef __KERNEL__ |
| 29 | |
Mike Frysinger | d4d7730 | 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 | 6cb142f | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 36 | |
Wolfgang Denk | 6cb142f | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 37 | /* |
Haavard Skinnemoen | 4d7d693 | 2007-12-13 12:56:33 +0100 | [diff] [blame] | 38 | * Given a physical address and a length, return a virtual address |
| 39 | * that can be used to access the memory range with the caching |
| 40 | * properties specified by "flags". |
| 41 | */ |
Haavard Skinnemoen | 4d7d693 | 2007-12-13 12:56:33 +0100 | [diff] [blame] | 42 | #define MAP_NOCACHE (0) |
| 43 | #define MAP_WRCOMBINE (0) |
| 44 | #define MAP_WRBACK (0) |
| 45 | #define MAP_WRTHROUGH (0) |
| 46 | |
| 47 | static inline void * |
| 48 | map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) |
| 49 | { |
| 50 | return (void *)paddr; |
| 51 | } |
| 52 | |
| 53 | /* |
| 54 | * Take down a mapping set up by map_physmem(). |
| 55 | */ |
| 56 | static inline void unmap_physmem(void *vaddr, unsigned long flags) |
| 57 | { |
| 58 | |
| 59 | } |
| 60 | |
Kumar Gala | 65e43a1 | 2008-12-13 17:20:27 -0600 | [diff] [blame] | 61 | static inline phys_addr_t virt_to_phys(void * vaddr) |
| 62 | { |
| 63 | return (phys_addr_t)(vaddr); |
| 64 | } |
| 65 | |
Haavard Skinnemoen | 4d7d693 | 2007-12-13 12:56:33 +0100 | [diff] [blame] | 66 | /* |
Wolfgang Denk | 6cb142f | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 67 | * These are for ISA/PCI shared memory _only_ and should never be used |
| 68 | * on any other type of memory, including Zorro memory. They are meant to |
| 69 | * access the bus in the bus byte order which is little-endian!. |
| 70 | * |
| 71 | * readX/writeX() are used to access memory mapped devices. On some |
| 72 | * architectures the memory mapped IO stuff needs to be accessed |
| 73 | * differently. On the m68k architecture, we just read/write the |
| 74 | * memory location directly. |
| 75 | */ |
| 76 | |
Mike Frysinger | d4d7730 | 2008-02-04 19:26:55 -0500 | [diff] [blame] | 77 | #ifndef __ASSEMBLY__ |
| 78 | |
| 79 | static inline unsigned char readb(const volatile void *addr) |
| 80 | { |
| 81 | unsigned int val; |
| 82 | int tmp; |
| 83 | |
| 84 | __asm__ __volatile__ ("cli %1;\n\t" |
| 85 | "NOP; NOP; SSYNC;\n\t" |
| 86 | "%0 = b [%2] (z);\n\t" |
| 87 | "sti %1;\n\t" |
| 88 | : "=d"(val), "=d"(tmp): "a"(addr)); |
| 89 | |
| 90 | return (unsigned char) val; |
| 91 | } |
| 92 | |
| 93 | static inline unsigned short readw(const volatile void *addr) |
| 94 | { |
| 95 | unsigned int val; |
| 96 | int tmp; |
| 97 | |
| 98 | __asm__ __volatile__ ("cli %1;\n\t" |
| 99 | "NOP; NOP; SSYNC;\n\t" |
| 100 | "%0 = w [%2] (z);\n\t" |
| 101 | "sti %1;\n\t" |
| 102 | : "=d"(val), "=d"(tmp): "a"(addr)); |
| 103 | |
| 104 | return (unsigned short) val; |
| 105 | } |
| 106 | |
| 107 | static inline unsigned int readl(const volatile void *addr) |
| 108 | { |
| 109 | unsigned int val; |
| 110 | int tmp; |
| 111 | |
| 112 | __asm__ __volatile__ ("cli %1;\n\t" |
| 113 | "NOP; NOP; SSYNC;\n\t" |
| 114 | "%0 = [%2];\n\t" |
| 115 | "sti %1;\n\t" |
| 116 | : "=d"(val), "=d"(tmp): "a"(addr)); |
| 117 | return val; |
| 118 | } |
| 119 | |
Mike Frysinger | bf53974 | 2008-02-04 19:26:54 -0500 | [diff] [blame] | 120 | #define __raw_readb readb |
| 121 | #define __raw_readw readw |
| 122 | #define __raw_readl readl |
Wolfgang Denk | 6cb142f | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 123 | |
Mike Frysinger | d4d7730 | 2008-02-04 19:26:55 -0500 | [diff] [blame] | 124 | #endif /* __ASSEMBLY__ */ |
| 125 | |
| 126 | #define writeb(b, addr) (void)((*(volatile unsigned char *) (addr)) = (b)) |
| 127 | #define writew(b, addr) (void)((*(volatile unsigned short *) (addr)) = (b)) |
| 128 | #define writel(b, addr) (void)((*(volatile unsigned int *) (addr)) = (b)) |
Mike Frysinger | bf53974 | 2008-02-04 19:26:54 -0500 | [diff] [blame] | 129 | #define __raw_writeb writeb |
| 130 | #define __raw_writew writew |
| 131 | #define __raw_writel writel |
Wolfgang Denk | 6cb142f | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 132 | |
Mike Frysinger | d4d7730 | 2008-02-04 19:26:55 -0500 | [diff] [blame] | 133 | #define memset_io(a, b, c) memset((void *)(a), (b), (c)) |
| 134 | #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c)) |
| 135 | #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c)) |
Wolfgang Denk | 6cb142f | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 136 | |
Mike Frysinger | 5eefe7e | 2009-11-30 13:34:07 -0500 | [diff] [blame^] | 137 | #if defined(CONFIG_STAMP_CF) || defined(CONFIG_BFIN_IDE) |
| 138 | /* This hack for CF/IDE needs to be addressed at some point */ |
| 139 | extern void cf_outsw(unsigned short *addr, unsigned short *sect_buf, int words); |
| 140 | extern void cf_insw(unsigned short *sect_buf, unsigned short *addr, int words); |
| 141 | extern unsigned char cf_inb(volatile unsigned char *addr); |
| 142 | extern void cf_outb(unsigned char val, volatile unsigned char *addr); |
| 143 | #undef inb |
| 144 | #undef outb |
| 145 | #undef insw |
| 146 | #undef outsw |
| 147 | #define inb(addr) cf_inb((void *)(addr)) |
| 148 | #define outb(x, addr) cf_outb((unsigned char)(x), (void *)(addr)) |
| 149 | #define insw(port, addr, cnt) cf_insw((void *)(addr), (void *)(port), cnt) |
| 150 | #define outsw(port, addr, cnt) cf_outsw((void *)(port), (void *)(addr), cnt) |
| 151 | #endif |
Wolfgang Denk | 6cb142f | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 152 | |
Wolfgang Denk | 6cb142f | 2006-03-12 02:12:27 +0100 | [diff] [blame] | 153 | #endif |
| 154 | #endif |