5 #include <linux/string.h>
6 #include <linux/types.h>
9 #include <asm/byteorder.h>
10 #include <asm/synch.h>
13 #define SIO_CONFIG_RA 0x398
14 #define SIO_CONFIG_RD 0x399
18 #define PMAC_ISA_MEM_BASE 0
19 #define PMAC_PCI_DRAM_OFFSET 0
20 #define CHRP_ISA_IO_BASE 0xf8000000
21 #define CHRP_ISA_MEM_BASE 0xf7000000
22 #define CHRP_PCI_DRAM_OFFSET 0
23 #define PREP_ISA_IO_BASE 0x80000000
24 #define PREP_ISA_MEM_BASE 0xc0000000
25 #define PREP_PCI_DRAM_OFFSET 0x80000000
27 #if defined(CONFIG_4xx)
28 #include <asm/ibm4xx.h>
29 #elif defined(CONFIG_8xx)
30 #include <asm/mpc8xx.h>
31 #elif defined(CONFIG_8260)
32 #include <asm/mpc8260.h>
33 #elif !defined(CONFIG_PCI)
35 #define _ISA_MEM_BASE 0
36 #define PCI_DRAM_OFFSET 0
37 #else /* Everyone else */
38 #define _IO_BASE isa_io_base
39 #define _ISA_MEM_BASE isa_mem_base
40 #define PCI_DRAM_OFFSET pci_dram_offset
41 #endif /* Platform-dependent I/O */
43 #define ___IO_BASE ((void __iomem *)_IO_BASE)
44 extern unsigned long isa_io_base;
45 extern unsigned long isa_mem_base;
46 extern unsigned long pci_dram_offset;
49 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
51 * Read operations have additional twi & isync to make sure the read
52 * is actually performed (i.e. the data has come back) before we start
53 * executing any following instructions.
55 extern inline int in_8(const volatile unsigned char __iomem *addr)
60 "sync; lbz%U1%X1 %0,%1;\n"
62 "isync" : "=r" (ret) : "m" (*addr));
66 extern inline void out_8(volatile unsigned char __iomem *addr, int val)
68 __asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
71 extern inline int in_le16(const volatile unsigned short __iomem *addr)
75 __asm__ __volatile__("sync; lhbrx %0,0,%1;\n"
77 "isync" : "=r" (ret) :
78 "r" (addr), "m" (*addr));
82 extern inline int in_be16(const volatile unsigned short __iomem *addr)
86 __asm__ __volatile__("sync; lhz%U1%X1 %0,%1;\n"
88 "isync" : "=r" (ret) : "m" (*addr));
92 extern inline void out_le16(volatile unsigned short __iomem *addr, int val)
94 __asm__ __volatile__("sync; sthbrx %1,0,%2" : "=m" (*addr) :
95 "r" (val), "r" (addr));
98 extern inline void out_be16(volatile unsigned short __iomem *addr, int val)
100 __asm__ __volatile__("sync; sth%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
103 extern inline unsigned in_le32(const volatile unsigned __iomem *addr)
107 __asm__ __volatile__("sync; lwbrx %0,0,%1;\n"
109 "isync" : "=r" (ret) :
110 "r" (addr), "m" (*addr));
114 extern inline unsigned in_be32(const volatile unsigned __iomem *addr)
118 __asm__ __volatile__("sync; lwz%U1%X1 %0,%1;\n"
120 "isync" : "=r" (ret) : "m" (*addr));
124 extern inline void out_le32(volatile unsigned __iomem *addr, int val)
126 __asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr) :
127 "r" (val), "r" (addr));
130 extern inline void out_be32(volatile unsigned __iomem *addr, int val)
132 __asm__ __volatile__("sync; stw%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
134 #if defined (CONFIG_8260_PCI9)
135 #define readb(addr) in_8((volatile u8 *)(addr))
136 #define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
138 static inline __u8 readb(const volatile void __iomem *addr)
142 static inline void writeb(__u8 b, volatile void __iomem *addr)
148 #if defined (CONFIG_8260_PCI9)
149 /* Use macros if PCI9 workaround enabled */
150 #define readw(addr) in_le16((volatile u16 *)(addr))
151 #define readl(addr) in_le32((volatile u32 *)(addr))
152 #define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
153 #define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
155 static inline __u16 readw(const volatile void __iomem *addr)
157 return in_le16(addr);
159 static inline __u32 readl(const volatile void __iomem *addr)
161 return in_le32(addr);
163 static inline void writew(__u16 b, volatile void __iomem *addr)
167 static inline void writel(__u32 b, volatile void __iomem *addr)
171 #endif /* CONFIG_8260_PCI9 */
173 #define readb_relaxed(addr) readb(addr)
174 #define readw_relaxed(addr) readw(addr)
175 #define readl_relaxed(addr) readl(addr)
177 static inline __u8 __raw_readb(const volatile void __iomem *addr)
179 return *(__force volatile __u8 *)(addr);
181 static inline __u16 __raw_readw(const volatile void __iomem *addr)
183 return *(__force volatile __u16 *)(addr);
185 static inline __u32 __raw_readl(const volatile void __iomem *addr)
187 return *(__force volatile __u32 *)(addr);
189 static inline void __raw_writeb(__u8 b, volatile void __iomem *addr)
191 *(__force volatile __u8 *)(addr) = b;
193 static inline void __raw_writew(__u16 b, volatile void __iomem *addr)
195 *(__force volatile __u16 *)(addr) = b;
197 static inline void __raw_writel(__u32 b, volatile void __iomem *addr)
199 *(__force volatile __u32 *)(addr) = b;
205 * The insw/outsw/insl/outsl macros don't do byte-swapping.
206 * They are only used in practice for transferring buffers which
207 * are arrays of bytes, and byte-swapping is not appropriate in
208 * that case. - paulus
210 #define insb(port, buf, ns) _insb((port)+___IO_BASE, (buf), (ns))
211 #define outsb(port, buf, ns) _outsb((port)+___IO_BASE, (buf), (ns))
212 #define insw(port, buf, ns) _insw_ns((port)+___IO_BASE, (buf), (ns))
213 #define outsw(port, buf, ns) _outsw_ns((port)+___IO_BASE, (buf), (ns))
214 #define insl(port, buf, nl) _insl_ns((port)+___IO_BASE, (buf), (nl))
215 #define outsl(port, buf, nl) _outsl_ns((port)+___IO_BASE, (buf), (nl))
217 #define readsb(a, b, n) _insb((a), (b), (n))
218 #define readsw(a, b, n) _insw_ns((a), (b), (n))
219 #define readsl(a, b, n) _insl_ns((a), (b), (n))
220 #define writesb(a, b, n) _outsb((a),(b),(n))
221 #define writesw(a, b, n) _outsw_ns((a),(b),(n))
222 #define writesl(a, b, n) _outsl_ns((a),(b),(n))
226 * On powermacs and 8xx we will get a machine check exception
227 * if we try to read data from a non-existent I/O port. Because
228 * the machine check is an asynchronous exception, it isn't
229 * well-defined which instruction SRR0 will point to when the
231 * With the sequence below (twi; isync; nop), we have found that
232 * the machine check occurs on one of the three instructions on
233 * all PPC implementations tested so far. The twi and isync are
234 * needed on the 601 (in fact twi; sync works too), the isync and
235 * nop are needed on 604[e|r], and any of twi, sync or isync will
236 * work on 603[e], 750, 74xx.
237 * The twi creates an explicit data dependency on the returned
238 * value which seems to be needed to make the 601 wait for the
242 #define __do_in_asm(name, op) \
243 extern __inline__ unsigned int name(unsigned int port) \
246 __asm__ __volatile__( \
248 "0:" op " %0,0,%1\n" \
253 ".section .fixup,\"ax\"\n" \
257 ".section __ex_table,\"a\"\n" \
265 : "r" (port + ___IO_BASE)); \
269 #define __do_out_asm(name, op) \
270 extern __inline__ void name(unsigned int val, unsigned int port) \
272 __asm__ __volatile__( \
274 "0:" op " %0,0,%1\n" \
277 ".section __ex_table,\"a\"\n" \
282 : : "r" (val), "r" (port + ___IO_BASE)); \
285 __do_out_asm(outb, "stbx")
286 #if defined (CONFIG_8260_PCI9)
287 /* in asm cannot be defined if PCI9 workaround is used */
288 #define inb(port) in_8((port)+___IO_BASE)
289 #define inw(port) in_le16((port)+___IO_BASE)
290 #define inl(port) in_le32((port)+___IO_BASE)
291 __do_out_asm(outw, "sthbrx")
292 __do_out_asm(outl, "stwbrx")
294 __do_in_asm(inb, "lbzx")
295 __do_in_asm(inw, "lhbrx")
296 __do_in_asm(inl, "lwbrx")
297 __do_out_asm(outw, "sthbrx")
298 __do_out_asm(outl, "stwbrx")
302 #define inb_p(port) inb((port))
303 #define outb_p(val, port) outb((val), (port))
304 #define inw_p(port) inw((port))
305 #define outw_p(val, port) outw((val), (port))
306 #define inl_p(port) inl((port))
307 #define outl_p(val, port) outl((val), (port))
309 extern void _insb(const volatile u8 __iomem *addr, void *buf, long count);
310 extern void _outsb(volatile u8 __iomem *addr,const void *buf,long count);
311 extern void _insw_ns(const volatile u16 __iomem *addr, void *buf, long count);
312 extern void _outsw_ns(volatile u16 __iomem *addr, const void *buf, long count);
313 extern void _insl_ns(const volatile u32 __iomem *addr, void *buf, long count);
314 extern void _outsl_ns(volatile u32 __iomem *addr, const void *buf, long count);
317 #define IO_SPACE_LIMIT ~0
319 #if defined (CONFIG_8260_PCI9)
320 #define memset_io(a,b,c) memset((void *)(a),(b),(c))
321 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
322 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
324 static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
326 memset((void __force *)addr, val, count);
328 static inline void memcpy_fromio(void *dst,const volatile void __iomem *src, int count)
330 memcpy(dst, (void __force *) src, count);
332 static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
334 memcpy((void __force *) dst, src, count);
339 * Map in an area of physical address space, for accessing
342 extern void __iomem *__ioremap(phys_addr_t address, unsigned long size,
343 unsigned long flags);
344 extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
346 extern void __iomem *ioremap64(unsigned long long address, unsigned long size);
348 #define ioremap_nocache(addr, size) ioremap((addr), (size))
349 extern void iounmap(volatile void __iomem *addr);
350 extern unsigned long iopa(unsigned long addr);
351 extern void io_block_mapping(unsigned long virt, phys_addr_t phys,
352 unsigned int size, int flags);
355 * The PCI bus is inherently Little-Endian. The PowerPC is being
356 * run Big-Endian. Thus all values which cross the [PCI] barrier
357 * must be endian-adjusted. Also, the local DRAM has a different
358 * address from the PCI point of view, thus buffer addresses also
359 * have to be modified [mapped] appropriately.
361 extern inline unsigned long virt_to_bus(volatile void * address)
363 if (address == (void *)0)
365 return (unsigned long)address - KERNELBASE + PCI_DRAM_OFFSET;
368 extern inline void * bus_to_virt(unsigned long address)
372 return (void *)(address - PCI_DRAM_OFFSET + KERNELBASE);
376 * Change virtual addresses to physical addresses and vv, for
377 * addresses in the area where the kernel has the RAM mapped.
379 extern inline unsigned long virt_to_phys(volatile void * address)
381 return (unsigned long) address - KERNELBASE;
384 extern inline void * phys_to_virt(unsigned long address)
386 return (void *) (address + KERNELBASE);
390 * Change "struct page" to physical address.
392 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
393 #define page_to_bus(page) (page_to_phys(page) + PCI_DRAM_OFFSET)
395 /* Enforce in-order execution of data I/O.
396 * No distinction between read/write on PPC; use eieio for all three.
398 #define iobarrier_rw() eieio()
399 #define iobarrier_r() eieio()
400 #define iobarrier_w() eieio()
403 * Here comes the ppc implementation of the IOMAP
406 static inline unsigned int ioread8(void __iomem *addr)
411 static inline unsigned int ioread16(void __iomem *addr)
416 static inline unsigned int ioread32(void __iomem *addr)
421 static inline void iowrite8(u8 val, void __iomem *addr)
426 static inline void iowrite16(u16 val, void __iomem *addr)
431 static inline void iowrite32(u32 val, void __iomem *addr)
436 static inline void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
438 _insb(addr, dst, count);
441 static inline void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
443 _insw_ns(addr, dst, count);
446 static inline void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
448 _insl_ns(addr, dst, count);
451 static inline void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
453 _outsb(addr, src, count);
456 static inline void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
458 _outsw_ns(addr, src, count);
461 static inline void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
463 _outsl_ns(addr, src, count);
466 /* Create a virtual mapping cookie for an IO port range */
467 extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
468 extern void ioport_unmap(void __iomem *);
470 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
472 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
473 extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
475 #endif /* _PPC_IO_H */
477 #ifdef CONFIG_8260_PCI9
478 #include <asm/mpc8260_pci9.h>
482 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
485 #define xlate_dev_mem_ptr(p) __va(p)
488 * Convert a virtual cached pointer to an uncached pointer
490 #define xlate_dev_kmem_ptr(p) p
493 #define setbits32(_addr, _v) out_be32((_addr), in_be32(_addr) | (_v))
494 #define clrbits32(_addr, _v) out_be32((_addr), in_be32(_addr) & ~(_v))
496 #define setbits16(_addr, _v) out_be16((_addr), in_be16(_addr) | (_v))
497 #define clrbits16(_addr, _v) out_be16((_addr), in_be16(_addr) & ~(_v))
499 #define setbits8(_addr, _v) out_8((_addr), in_8(_addr) | (_v))
500 #define clrbits8(_addr, _v) out_8((_addr), in_8(_addr) & ~(_v))
502 #endif /* __KERNEL__ */