io.h 10 KB

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  1. /* originally from linux source.
  2. * removed the dependencies on CONFIG_ values
  3. * removed virt_to_phys stuff (and in fact everything surrounded by #if __KERNEL__)
  4. * Modified By Rob Taylor, Flying Pig Systems, 2000
  5. */
  6. #ifndef _PPC_IO_H
  7. #define _PPC_IO_H
  8. #include <asm/byteorder.h>
  9. #ifdef CONFIG_ADDR_MAP
  10. #include <asm/global_data.h>
  11. #include <addr_map.h>
  12. DECLARE_GLOBAL_DATA_PTR;
  13. #endif
  14. #define SIO_CONFIG_RA 0x398
  15. #define SIO_CONFIG_RD 0x399
  16. #ifndef _IO_BASE
  17. #define _IO_BASE 0
  18. #endif
  19. #define readb(addr) in_8((volatile u8 *)(addr))
  20. #define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
  21. #if !defined(__BIG_ENDIAN)
  22. #define readw(addr) (*(volatile u16 *) (addr))
  23. #define readl(addr) (*(volatile u32 *) (addr))
  24. #define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
  25. #define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
  26. #else
  27. #define readw(addr) in_le16((volatile u16 *)(addr))
  28. #define readl(addr) in_le32((volatile u32 *)(addr))
  29. #define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
  30. #define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
  31. #endif
  32. /*
  33. * The insw/outsw/insl/outsl macros don't do byte-swapping.
  34. * They are only used in practice for transferring buffers which
  35. * are arrays of bytes, and byte-swapping is not appropriate in
  36. * that case. - paulus
  37. */
  38. #define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
  39. #define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
  40. #define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
  41. #define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
  42. #define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
  43. #define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
  44. #define inb(port) in_8((u8 *)((port)+_IO_BASE))
  45. #define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
  46. #if !defined(__BIG_ENDIAN)
  47. #define inw(port) in_be16((u16 *)((port)+_IO_BASE))
  48. #define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val))
  49. #define inl(port) in_be32((u32 *)((port)+_IO_BASE))
  50. #define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val))
  51. #else
  52. #define inw(port) in_le16((u16 *)((port)+_IO_BASE))
  53. #define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
  54. #define inl(port) in_le32((u32 *)((port)+_IO_BASE))
  55. #define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
  56. #endif
  57. #define inb_p(port) in_8((u8 *)((port)+_IO_BASE))
  58. #define outb_p(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
  59. #define inw_p(port) in_le16((u16 *)((port)+_IO_BASE))
  60. #define outw_p(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
  61. #define inl_p(port) in_le32((u32 *)((port)+_IO_BASE))
  62. #define outl_p(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
  63. extern void _insb(volatile u8 *port, void *buf, int ns);
  64. extern void _outsb(volatile u8 *port, const void *buf, int ns);
  65. extern void _insw(volatile u16 *port, void *buf, int ns);
  66. extern void _outsw(volatile u16 *port, const void *buf, int ns);
  67. extern void _insl(volatile u32 *port, void *buf, int nl);
  68. extern void _outsl(volatile u32 *port, const void *buf, int nl);
  69. extern void _insw_ns(volatile u16 *port, void *buf, int ns);
  70. extern void _outsw_ns(volatile u16 *port, const void *buf, int ns);
  71. extern void _insl_ns(volatile u32 *port, void *buf, int nl);
  72. extern void _outsl_ns(volatile u32 *port, const void *buf, int nl);
  73. /*
  74. * The *_ns versions below don't do byte-swapping.
  75. * Neither do the standard versions now, these are just here
  76. * for older code.
  77. */
  78. #define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
  79. #define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
  80. #define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
  81. #define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
  82. #define IO_SPACE_LIMIT ~0
  83. #define memset_io(a,b,c) memset((void *)(a),(b),(c))
  84. #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
  85. #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
  86. /*
  87. * Enforce In-order Execution of I/O:
  88. * Acts as a barrier to ensure all previous I/O accesses have
  89. * completed before any further ones are issued.
  90. */
  91. static inline void eieio(void)
  92. {
  93. __asm__ __volatile__ ("eieio" : : : "memory");
  94. }
  95. static inline void sync(void)
  96. {
  97. __asm__ __volatile__ ("sync" : : : "memory");
  98. }
  99. static inline void isync(void)
  100. {
  101. __asm__ __volatile__ ("isync" : : : "memory");
  102. }
  103. /* Enforce in-order execution of data I/O.
  104. * No distinction between read/write on PPC; use eieio for all three.
  105. */
  106. #define iobarrier_rw() eieio()
  107. #define iobarrier_r() eieio()
  108. #define iobarrier_w() eieio()
  109. #define mb() sync()
  110. #define isb() isync()
  111. /*
  112. * Non ordered and non-swapping "raw" accessors
  113. */
  114. #define PCI_FIX_ADDR(addr) (addr)
  115. static inline unsigned char __raw_readb(const volatile void __iomem *addr)
  116. {
  117. return *(volatile unsigned char *)PCI_FIX_ADDR(addr);
  118. }
  119. static inline unsigned short __raw_readw(const volatile void __iomem *addr)
  120. {
  121. return *(volatile unsigned short *)PCI_FIX_ADDR(addr);
  122. }
  123. static inline unsigned int __raw_readl(const volatile void __iomem *addr)
  124. {
  125. return *(volatile unsigned int *)PCI_FIX_ADDR(addr);
  126. }
  127. static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
  128. {
  129. *(volatile unsigned char *)PCI_FIX_ADDR(addr) = v;
  130. }
  131. static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
  132. {
  133. *(volatile unsigned short *)PCI_FIX_ADDR(addr) = v;
  134. }
  135. static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
  136. {
  137. *(volatile unsigned int *)PCI_FIX_ADDR(addr) = v;
  138. }
  139. /*
  140. * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
  141. *
  142. * Read operations have additional twi & isync to make sure the read
  143. * is actually performed (i.e. the data has come back) before we start
  144. * executing any following instructions.
  145. */
  146. static inline u8 in_8(const volatile unsigned char __iomem *addr)
  147. {
  148. u8 ret;
  149. __asm__ __volatile__(
  150. "sync; lbz%U1%X1 %0,%1;\n"
  151. "twi 0,%0,0;\n"
  152. "isync" : "=r" (ret) : "m" (*addr));
  153. return ret;
  154. }
  155. static inline void out_8(volatile unsigned char __iomem *addr, u8 val)
  156. {
  157. __asm__ __volatile__("sync;\n"
  158. "stb%U0%X0 %1,%0;\n"
  159. : "=m" (*addr)
  160. : "r" (val));
  161. }
  162. static inline u16 in_le16(const volatile unsigned short __iomem *addr)
  163. {
  164. u16 ret;
  165. __asm__ __volatile__("sync; lhbrx %0,0,%1;\n"
  166. "twi 0,%0,0;\n"
  167. "isync" : "=r" (ret) :
  168. "r" (addr), "m" (*addr));
  169. return ret;
  170. }
  171. static inline u16 in_be16(const volatile unsigned short __iomem *addr)
  172. {
  173. u16 ret;
  174. __asm__ __volatile__("sync; lhz%U1%X1 %0,%1;\n"
  175. "twi 0,%0,0;\n"
  176. "isync" : "=r" (ret) : "m" (*addr));
  177. return ret;
  178. }
  179. static inline void out_le16(volatile unsigned short __iomem *addr, u16 val)
  180. {
  181. __asm__ __volatile__("sync; sthbrx %1,0,%2" : "=m" (*addr) :
  182. "r" (val), "r" (addr));
  183. }
  184. static inline void out_be16(volatile unsigned short __iomem *addr, u16 val)
  185. {
  186. __asm__ __volatile__("sync; sth%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
  187. }
  188. static inline u32 in_le32(const volatile unsigned __iomem *addr)
  189. {
  190. u32 ret;
  191. __asm__ __volatile__("sync; lwbrx %0,0,%1;\n"
  192. "twi 0,%0,0;\n"
  193. "isync" : "=r" (ret) :
  194. "r" (addr), "m" (*addr));
  195. return ret;
  196. }
  197. static inline u32 in_be32(const volatile unsigned __iomem *addr)
  198. {
  199. u32 ret;
  200. __asm__ __volatile__("sync; lwz%U1%X1 %0,%1;\n"
  201. "twi 0,%0,0;\n"
  202. "isync" : "=r" (ret) : "m" (*addr));
  203. return ret;
  204. }
  205. static inline void out_le32(volatile unsigned __iomem *addr, u32 val)
  206. {
  207. __asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr) :
  208. "r" (val), "r" (addr));
  209. }
  210. static inline void out_be32(volatile unsigned __iomem *addr, u32 val)
  211. {
  212. __asm__ __volatile__("sync; stw%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
  213. }
  214. /* Clear and set bits in one shot. These macros can be used to clear and
  215. * set multiple bits in a register using a single call. These macros can
  216. * also be used to set a multiple-bit bit pattern using a mask, by
  217. * specifying the mask in the 'clear' parameter and the new bit pattern
  218. * in the 'set' parameter.
  219. */
  220. #define clrbits(type, addr, clear) \
  221. out_##type((addr), in_##type(addr) & ~(clear))
  222. #define setbits(type, addr, set) \
  223. out_##type((addr), in_##type(addr) | (set))
  224. #define clrsetbits(type, addr, clear, set) \
  225. out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
  226. #define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
  227. #define setbits_be32(addr, set) setbits(be32, addr, set)
  228. #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
  229. #define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
  230. #define setbits_le32(addr, set) setbits(le32, addr, set)
  231. #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
  232. #define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
  233. #define setbits_be16(addr, set) setbits(be16, addr, set)
  234. #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
  235. #define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
  236. #define setbits_le16(addr, set) setbits(le16, addr, set)
  237. #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
  238. #define clrbits_8(addr, clear) clrbits(8, addr, clear)
  239. #define setbits_8(addr, set) setbits(8, addr, set)
  240. #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
  241. #define readb_be(addr) \
  242. __raw_readb((__force unsigned *)(addr))
  243. #define readw_be(addr) \
  244. be16_to_cpu(__raw_readw((__force unsigned *)(addr)))
  245. #define readl_be(addr) \
  246. be32_to_cpu(__raw_readl((__force unsigned *)(addr)))
  247. #define readq_be(addr) \
  248. be64_to_cpu(__raw_readq((__force unsigned *)(addr)))
  249. #define writeb_be(val, addr) \
  250. __raw_writeb((val), (__force unsigned *)(addr))
  251. #define writew_be(val, addr) \
  252. __raw_writew(cpu_to_be16((val)), (__force unsigned *)(addr))
  253. #define writel_be(val, addr) \
  254. __raw_writel(cpu_to_be32((val)), (__force unsigned *)(addr))
  255. #define writeq_be(val, addr) \
  256. __raw_writeq(cpu_to_be64((val)), (__force unsigned *)(addr))
  257. static inline void *phys_to_virt(phys_addr_t paddr)
  258. {
  259. #ifdef CONFIG_ADDR_MAP
  260. if (gd->flags & GD_FLG_RELOC)
  261. return addrmap_phys_to_virt(paddr);
  262. #endif
  263. return (void *)((unsigned long)paddr);
  264. }
  265. #define phys_to_virt phys_to_virt
  266. static inline phys_addr_t virt_to_phys(void * vaddr)
  267. {
  268. #ifdef CONFIG_ADDR_MAP
  269. if (gd->flags & GD_FLG_RELOC)
  270. return addrmap_virt_to_phys(vaddr);
  271. #endif
  272. return (phys_addr_t)((unsigned long)vaddr);
  273. }
  274. #define virt_to_phys virt_to_phys
  275. #include <asm-generic/io.h>
  276. #endif