1 #ifndef _ASM_POWERPC_IO_H
2 #define _ASM_POWERPC_IO_H
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 /* Check of existence of legacy devices */
13 extern int check_legacy_ioport(unsigned long base_port);
14 #define PNPBIOS_BASE 0xf000 /* only relevant for PReP */
16 #include <linux/compiler.h>
18 #include <asm/byteorder.h>
19 #include <asm/synch.h>
20 #include <asm/delay.h>
23 #include <asm-generic/iomap.h>
29 #define SIO_CONFIG_RA 0x398
30 #define SIO_CONFIG_RD 0x399
34 /* 32 bits uses slightly different variables for the various IO
35 * bases. Most of this file only uses _IO_BASE though which we
36 * define properly based on the platform
40 #define _ISA_MEM_BASE 0
41 #define PCI_DRAM_OFFSET 0
42 #elif defined(CONFIG_PPC32)
43 #define _IO_BASE isa_io_base
44 #define _ISA_MEM_BASE isa_mem_base
45 #define PCI_DRAM_OFFSET pci_dram_offset
47 #define _IO_BASE pci_io_base
48 #define _ISA_MEM_BASE 0
49 #define PCI_DRAM_OFFSET 0
52 extern unsigned long isa_io_base;
53 extern unsigned long isa_mem_base;
54 extern unsigned long pci_io_base;
55 extern unsigned long pci_dram_offset;
57 #if defined(CONFIG_PPC32) && defined(CONFIG_PPC_INDIRECT_IO)
58 #error CONFIG_PPC_INDIRECT_IO is not yet supported on 32 bits
63 * Low level MMIO accessors
65 * This provides the non-bus specific accessors to MMIO. Those are PowerPC
66 * specific and thus shouldn't be used in generic code. The accessors
69 * in_8, in_le16, in_be16, in_le32, in_be32, in_le64, in_be64
70 * out_8, out_le16, out_be16, out_le32, out_be32, out_le64, out_be64
71 * _insb, _insw_ns, _insl_ns, _outsb, _outsw_ns, _outsl_ns
73 * Those operate directly on a kernel virtual address. Note that the prototype
74 * for the out_* accessors has the arguments in opposite order from the usual
75 * linux PCI accessors. Unlike those, they take the address first and the value
78 * Note: I might drop the _ns suffix on the stream operations soon as it is
79 * simply normal for stream operations to not swap in the first place.
84 #define IO_SET_SYNC_FLAG() do { get_paca()->io_sync = 1; } while(0)
86 #define IO_SET_SYNC_FLAG()
89 #define DEF_MMIO_IN(name, type, insn) \
90 static inline type name(const volatile type __iomem *addr) \
93 __asm__ __volatile__("sync;" insn ";twi 0,%0,0;isync" \
94 : "=r" (ret) : "r" (addr), "m" (*addr)); \
98 #define DEF_MMIO_OUT(name, type, insn) \
99 static inline void name(volatile type __iomem *addr, type val) \
101 __asm__ __volatile__("sync;" insn \
102 : "=m" (*addr) : "r" (val), "r" (addr)); \
103 IO_SET_SYNC_FLAG(); \
107 #define DEF_MMIO_IN_BE(name, size, insn) \
108 DEF_MMIO_IN(name, u##size, __stringify(insn)"%U2%X2 %0,%2")
109 #define DEF_MMIO_IN_LE(name, size, insn) \
110 DEF_MMIO_IN(name, u##size, __stringify(insn)" %0,0,%1")
112 #define DEF_MMIO_OUT_BE(name, size, insn) \
113 DEF_MMIO_OUT(name, u##size, __stringify(insn)"%U0%X0 %1,%0")
114 #define DEF_MMIO_OUT_LE(name, size, insn) \
115 DEF_MMIO_OUT(name, u##size, __stringify(insn)" %1,0,%2")
117 DEF_MMIO_IN_BE(in_8, 8, lbz);
118 DEF_MMIO_IN_BE(in_be16, 16, lhz);
119 DEF_MMIO_IN_BE(in_be32, 32, lwz);
120 DEF_MMIO_IN_LE(in_le16, 16, lhbrx);
121 DEF_MMIO_IN_LE(in_le32, 32, lwbrx);
123 DEF_MMIO_OUT_BE(out_8, 8, stb);
124 DEF_MMIO_OUT_BE(out_be16, 16, sth);
125 DEF_MMIO_OUT_BE(out_be32, 32, stw);
126 DEF_MMIO_OUT_LE(out_le16, 16, sthbrx);
127 DEF_MMIO_OUT_LE(out_le32, 32, stwbrx);
130 DEF_MMIO_OUT_BE(out_be64, 64, std);
131 DEF_MMIO_IN_BE(in_be64, 64, ld);
133 /* There is no asm instructions for 64 bits reverse loads and stores */
134 static inline u64 in_le64(const volatile u64 __iomem *addr)
136 return le64_to_cpu(in_be64(addr));
139 static inline void out_le64(volatile u64 __iomem *addr, u64 val)
141 out_be64(addr, cpu_to_le64(val));
143 #endif /* __powerpc64__ */
146 * Low level IO stream instructions are defined out of line for now
148 extern void _insb(const volatile u8 __iomem *addr, void *buf, long count);
149 extern void _outsb(volatile u8 __iomem *addr,const void *buf,long count);
150 extern void _insw_ns(const volatile u16 __iomem *addr, void *buf, long count);
151 extern void _outsw_ns(volatile u16 __iomem *addr, const void *buf, long count);
152 extern void _insl_ns(const volatile u32 __iomem *addr, void *buf, long count);
153 extern void _outsl_ns(volatile u32 __iomem *addr, const void *buf, long count);
155 /* The _ns naming is historical and will be removed. For now, just #define
156 * the non _ns equivalent names
158 #define _insw _insw_ns
159 #define _insl _insl_ns
160 #define _outsw _outsw_ns
161 #define _outsl _outsl_ns
165 * memset_io, memcpy_toio, memcpy_fromio base implementations are out of line
168 extern void _memset_io(volatile void __iomem *addr, int c, unsigned long n);
169 extern void _memcpy_fromio(void *dest, const volatile void __iomem *src,
171 extern void _memcpy_toio(volatile void __iomem *dest, const void *src,
176 * PCI and standard ISA accessors
178 * Those are globally defined linux accessors for devices on PCI or ISA
179 * busses. They follow the Linux defined semantics. The current implementation
180 * for PowerPC is as close as possible to the x86 version of these, and thus
181 * provides fairly heavy weight barriers for the non-raw versions
183 * In addition, they support a hook mechanism when CONFIG_PPC_INDIRECT_IO
184 * allowing the platform to provide its own implementation of some or all
189 * Include the EEH definitions when EEH is enabled only so they don't get
190 * in the way when building for 32 bits
196 /* Shortcut to the MMIO argument pointer */
197 #define PCI_IO_ADDR volatile void __iomem *
199 /* Indirect IO address tokens:
201 * When CONFIG_PPC_INDIRECT_IO is set, the platform can provide hooks
202 * on all IOs. (Note that this is all 64 bits only for now)
204 * To help platforms who may need to differenciate MMIO addresses in
205 * their hooks, a bitfield is reserved for use by the platform near the
206 * top of MMIO addresses (not PIO, those have to cope the hard way).
208 * This bit field is 12 bits and is at the top of the IO virtual
209 * addresses PCI_IO_INDIRECT_TOKEN_MASK.
211 * The kernel virtual space is thus:
213 * 0xD000000000000000 : vmalloc
214 * 0xD000080000000000 : PCI PHB IO space
215 * 0xD000080080000000 : ioremap
216 * 0xD0000fffffffffff : end of ioremap region
218 * Since the top 4 bits are reserved as the region ID, we use thus
219 * the next 12 bits and keep 4 bits available for the future if the
220 * virtual address space is ever to be extended.
222 * The direct IO mapping operations will then mask off those bits
223 * before doing the actual access, though that only happen when
224 * CONFIG_PPC_INDIRECT_IO is set, thus be careful when you use that
228 #ifdef CONFIG_PPC_INDIRECT_IO
229 #define PCI_IO_IND_TOKEN_MASK 0x0fff000000000000ul
230 #define PCI_IO_IND_TOKEN_SHIFT 48
231 #define PCI_FIX_ADDR(addr) \
232 ((PCI_IO_ADDR)(((unsigned long)(addr)) & ~PCI_IO_IND_TOKEN_MASK))
233 #define PCI_GET_ADDR_TOKEN(addr) \
234 (((unsigned long)(addr) & PCI_IO_IND_TOKEN_MASK) >> \
235 PCI_IO_IND_TOKEN_SHIFT)
236 #define PCI_SET_ADDR_TOKEN(addr, token) \
238 unsigned long __a = (unsigned long)(addr); \
239 __a &= ~PCI_IO_IND_TOKEN_MASK; \
240 __a |= ((unsigned long)(token)) << PCI_IO_IND_TOKEN_SHIFT; \
241 (addr) = (void __iomem *)__a; \
244 #define PCI_FIX_ADDR(addr) (addr)
249 * Non ordered and non-swapping "raw" accessors
252 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
254 return *(volatile unsigned char __force *)PCI_FIX_ADDR(addr);
256 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
258 return *(volatile unsigned short __force *)PCI_FIX_ADDR(addr);
260 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
262 return *(volatile unsigned int __force *)PCI_FIX_ADDR(addr);
264 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
266 *(volatile unsigned char __force *)PCI_FIX_ADDR(addr) = v;
268 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
270 *(volatile unsigned short __force *)PCI_FIX_ADDR(addr) = v;
272 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
274 *(volatile unsigned int __force *)PCI_FIX_ADDR(addr) = v;
278 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
280 return *(volatile unsigned long __force *)PCI_FIX_ADDR(addr);
282 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
284 *(volatile unsigned long __force *)PCI_FIX_ADDR(addr) = v;
286 #endif /* __powerpc64__ */
290 * PCI PIO and MMIO accessors.
293 * On 32 bits, PIO operations have a recovery mechanism in case they trigger
294 * machine checks (which they occasionally do when probing non existing
295 * IO ports on some platforms, like PowerMac and 8xx).
296 * I always found it to be of dubious reliability and I am tempted to get
297 * rid of it one of these days. So if you think it's important to keep it,
298 * please voice up asap. We never had it for 64 bits and I do not intend
304 #define __do_in_asm(name, op) \
305 static inline unsigned int name(unsigned int port) \
308 __asm__ __volatile__( \
310 "0:" op " %0,0,%1\n" \
315 ".section .fixup,\"ax\"\n" \
319 ".section __ex_table,\"a\"\n" \
327 : "r" (port + _IO_BASE)); \
331 #define __do_out_asm(name, op) \
332 static inline void name(unsigned int val, unsigned int port) \
334 __asm__ __volatile__( \
336 "0:" op " %0,0,%1\n" \
339 ".section __ex_table,\"a\"\n" \
344 : : "r" (val), "r" (port + _IO_BASE)); \
347 __do_in_asm(_rec_inb, "lbzx")
348 __do_in_asm(_rec_inw, "lhbrx")
349 __do_in_asm(_rec_inl, "lwbrx")
350 __do_out_asm(_rec_outb, "stbx")
351 __do_out_asm(_rec_outw, "sthbrx")
352 __do_out_asm(_rec_outl, "stwbrx")
354 #endif /* CONFIG_PPC32 */
356 /* The "__do_*" operations below provide the actual "base" implementation
357 * for each of the defined acccessor. Some of them use the out_* functions
358 * directly, some of them still use EEH, though we might change that in the
359 * future. Those macros below provide the necessary argument swapping and
360 * handling of the IO base for PIO.
362 * They are themselves used by the macros that define the actual accessors
363 * and can be used by the hooks if any.
365 * Note that PIO operations are always defined in terms of their corresonding
366 * MMIO operations. That allows platforms like iSeries who want to modify the
367 * behaviour of both to only hook on the MMIO version and get both. It's also
368 * possible to hook directly at the toplevel PIO operation if they have to
369 * be handled differently
371 #define __do_writeb(val, addr) out_8(PCI_FIX_ADDR(addr), val)
372 #define __do_writew(val, addr) out_le16(PCI_FIX_ADDR(addr), val)
373 #define __do_writel(val, addr) out_le32(PCI_FIX_ADDR(addr), val)
374 #define __do_writeq(val, addr) out_le64(PCI_FIX_ADDR(addr), val)
375 #define __do_writew_be(val, addr) out_be16(PCI_FIX_ADDR(addr), val)
376 #define __do_writel_be(val, addr) out_be32(PCI_FIX_ADDR(addr), val)
377 #define __do_writeq_be(val, addr) out_be64(PCI_FIX_ADDR(addr), val)
380 #define __do_readb(addr) eeh_readb(PCI_FIX_ADDR(addr))
381 #define __do_readw(addr) eeh_readw(PCI_FIX_ADDR(addr))
382 #define __do_readl(addr) eeh_readl(PCI_FIX_ADDR(addr))
383 #define __do_readq(addr) eeh_readq(PCI_FIX_ADDR(addr))
384 #define __do_readw_be(addr) eeh_readw_be(PCI_FIX_ADDR(addr))
385 #define __do_readl_be(addr) eeh_readl_be(PCI_FIX_ADDR(addr))
386 #define __do_readq_be(addr) eeh_readq_be(PCI_FIX_ADDR(addr))
387 #else /* CONFIG_EEH */
388 #define __do_readb(addr) in_8(PCI_FIX_ADDR(addr))
389 #define __do_readw(addr) in_le16(PCI_FIX_ADDR(addr))
390 #define __do_readl(addr) in_le32(PCI_FIX_ADDR(addr))
391 #define __do_readq(addr) in_le64(PCI_FIX_ADDR(addr))
392 #define __do_readw_be(addr) in_be16(PCI_FIX_ADDR(addr))
393 #define __do_readl_be(addr) in_be32(PCI_FIX_ADDR(addr))
394 #define __do_readq_be(addr) in_be64(PCI_FIX_ADDR(addr))
395 #endif /* !defined(CONFIG_EEH) */
398 #define __do_outb(val, port) _rec_outb(val, port)
399 #define __do_outw(val, port) _rec_outw(val, port)
400 #define __do_outl(val, port) _rec_outl(val, port)
401 #define __do_inb(port) _rec_inb(port)
402 #define __do_inw(port) _rec_inw(port)
403 #define __do_inl(port) _rec_inl(port)
404 #else /* CONFIG_PPC32 */
405 #define __do_outb(val, port) writeb(val,(PCI_IO_ADDR)_IO_BASE+port);
406 #define __do_outw(val, port) writew(val,(PCI_IO_ADDR)_IO_BASE+port);
407 #define __do_outl(val, port) writel(val,(PCI_IO_ADDR)_IO_BASE+port);
408 #define __do_inb(port) readb((PCI_IO_ADDR)_IO_BASE + port);
409 #define __do_inw(port) readw((PCI_IO_ADDR)_IO_BASE + port);
410 #define __do_inl(port) readl((PCI_IO_ADDR)_IO_BASE + port);
411 #endif /* !CONFIG_PPC32 */
414 #define __do_readsb(a, b, n) eeh_readsb(PCI_FIX_ADDR(a), (b), (n))
415 #define __do_readsw(a, b, n) eeh_readsw(PCI_FIX_ADDR(a), (b), (n))
416 #define __do_readsl(a, b, n) eeh_readsl(PCI_FIX_ADDR(a), (b), (n))
417 #else /* CONFIG_EEH */
418 #define __do_readsb(a, b, n) _insb(PCI_FIX_ADDR(a), (b), (n))
419 #define __do_readsw(a, b, n) _insw(PCI_FIX_ADDR(a), (b), (n))
420 #define __do_readsl(a, b, n) _insl(PCI_FIX_ADDR(a), (b), (n))
421 #endif /* !CONFIG_EEH */
422 #define __do_writesb(a, b, n) _outsb(PCI_FIX_ADDR(a),(b),(n))
423 #define __do_writesw(a, b, n) _outsw(PCI_FIX_ADDR(a),(b),(n))
424 #define __do_writesl(a, b, n) _outsl(PCI_FIX_ADDR(a),(b),(n))
426 #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
427 #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
428 #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
429 #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
430 #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
431 #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
433 #define __do_memset_io(addr, c, n) \
434 _memset_io(PCI_FIX_ADDR(addr), c, n)
435 #define __do_memcpy_toio(dst, src, n) \
436 _memcpy_toio(PCI_FIX_ADDR(dst), src, n)
439 #define __do_memcpy_fromio(dst, src, n) \
440 eeh_memcpy_fromio(dst, PCI_FIX_ADDR(src), n)
441 #else /* CONFIG_EEH */
442 #define __do_memcpy_fromio(dst, src, n) \
443 _memcpy_fromio(dst,PCI_FIX_ADDR(src),n)
444 #endif /* !CONFIG_EEH */
446 #ifdef CONFIG_PPC_INDIRECT_IO
447 #define DEF_PCI_HOOK(x) x
449 #define DEF_PCI_HOOK(x) NULL
452 /* Structure containing all the hooks */
453 extern struct ppc_pci_io {
455 #define DEF_PCI_AC_RET(name, ret, at, al) ret (*name) at;
456 #define DEF_PCI_AC_NORET(name, at, al) void (*name) at;
458 #include <asm/io-defs.h>
460 #undef DEF_PCI_AC_RET
461 #undef DEF_PCI_AC_NORET
465 /* The inline wrappers */
466 #define DEF_PCI_AC_RET(name, ret, at, al) \
467 static inline ret name at \
469 if (DEF_PCI_HOOK(ppc_pci_io.name) != NULL) \
470 return ppc_pci_io.name al; \
471 return __do_##name al; \
474 #define DEF_PCI_AC_NORET(name, at, al) \
475 static inline void name at \
477 if (DEF_PCI_HOOK(ppc_pci_io.name) != NULL) \
478 ppc_pci_io.name al; \
483 #include <asm/io-defs.h>
485 #undef DEF_PCI_AC_RET
486 #undef DEF_PCI_AC_NORET
488 /* Some drivers check for the presence of readq & writeq with
489 * a #ifdef, so we make them happy here.
493 #define writeq writeq
496 #ifdef CONFIG_NOT_COHERENT_CACHE
498 #define dma_cache_inv(_start,_size) \
499 invalidate_dcache_range(_start, (_start + _size))
500 #define dma_cache_wback(_start,_size) \
501 clean_dcache_range(_start, (_start + _size))
502 #define dma_cache_wback_inv(_start,_size) \
503 flush_dcache_range(_start, (_start + _size))
505 #else /* CONFIG_NOT_COHERENT_CACHE */
507 #define dma_cache_inv(_start,_size) do { } while (0)
508 #define dma_cache_wback(_start,_size) do { } while (0)
509 #define dma_cache_wback_inv(_start,_size) do { } while (0)
511 #endif /* !CONFIG_NOT_COHERENT_CACHE */
514 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
517 #define xlate_dev_mem_ptr(p) __va(p)
520 * Convert a virtual cached pointer to an uncached pointer
522 #define xlate_dev_kmem_ptr(p) p
525 * We don't do relaxed operations yet, at least not with this semantic
527 #define readb_relaxed(addr) readb(addr)
528 #define readw_relaxed(addr) readw(addr)
529 #define readl_relaxed(addr) readl(addr)
530 #define readq_relaxed(addr) readq(addr)
536 * Enforce synchronisation of stores vs. spin_unlock
537 * (this does it explicitely, though our implementation of spin_unlock
538 * does it implicitely too)
540 static inline void mmiowb(void)
544 __asm__ __volatile__("sync; li %0,0; stb %0,%1(13)"
545 : "=&r" (tmp) : "i" (offsetof(struct paca_struct, io_sync))
548 #endif /* !CONFIG_PPC32 */
550 static inline void iosync(void)
552 __asm__ __volatile__ ("sync" : : : "memory");
555 /* Enforce in-order execution of data I/O.
556 * No distinction between read/write on PPC; use eieio for all three.
557 * Those are fairly week though. They don't provide a barrier between
558 * MMIO and cacheable storage nor do they provide a barrier vs. locks,
559 * they only provide barriers between 2 __raw MMIO operations and
560 * possibly break write combining.
562 #define iobarrier_rw() eieio()
563 #define iobarrier_r() eieio()
564 #define iobarrier_w() eieio()
568 * output pause versions need a delay at least for the
569 * w83c105 ide controller in a p610.
571 #define inb_p(port) inb(port)
572 #define outb_p(val, port) (udelay(1), outb((val), (port)))
573 #define inw_p(port) inw(port)
574 #define outw_p(val, port) (udelay(1), outw((val), (port)))
575 #define inl_p(port) inl(port)
576 #define outl_p(val, port) (udelay(1), outl((val), (port)))
579 #define IO_SPACE_LIMIT ~(0UL)
583 * ioremap - map bus memory into CPU space
584 * @address: bus address of the memory
585 * @size: size of the resource to map
587 * ioremap performs a platform specific sequence of operations to
588 * make bus memory CPU accessible via the readb/readw/readl/writeb/
589 * writew/writel functions and the other mmio helpers. The returned
590 * address is not guaranteed to be usable directly as a virtual
593 * We provide a few variations of it:
595 * * ioremap is the standard one and provides non-cacheable guarded mappings
596 * and can be hooked by the platform via ppc_md
598 * * ioremap_flags allows to specify the page flags as an argument and can
599 * also be hooked by the platform via ppc_md
601 * * ioremap_nocache is identical to ioremap
603 * * iounmap undoes such a mapping and can be hooked
605 * * __ioremap_explicit (and the pending __iounmap_explicit) are low level
606 * functions to create hand-made mappings for use only by the PCI code
607 * and cannot currently be hooked.
609 * * __ioremap is the low level implementation used by ioremap and
610 * ioremap_flags and cannot be hooked (but can be used by a hook on one
611 * of the previous ones)
613 * * __iounmap, is the low level implementation used by iounmap and cannot
614 * be hooked (but can be used by a hook on iounmap)
617 extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
618 extern void __iomem *ioremap_flags(phys_addr_t address, unsigned long size,
619 unsigned long flags);
620 #define ioremap_nocache(addr, size) ioremap((addr), (size))
621 extern void iounmap(volatile void __iomem *addr);
623 extern void __iomem *__ioremap(phys_addr_t, unsigned long size,
624 unsigned long flags);
625 extern void __iounmap(volatile void __iomem *addr);
627 extern int __ioremap_explicit(phys_addr_t p_addr, unsigned long v_addr,
628 unsigned long size, unsigned long flags);
629 extern int __iounmap_explicit(volatile void __iomem *start,
632 extern void __iomem * reserve_phb_iospace(unsigned long size);
634 /* Those are more 32 bits only functions */
635 extern unsigned long iopa(unsigned long addr);
636 extern unsigned long mm_ptov(unsigned long addr) __attribute_const__;
637 extern void io_block_mapping(unsigned long virt, phys_addr_t phys,
638 unsigned int size, int flags);
642 * When CONFIG_PPC_INDIRECT_IO is set, we use the generic iomap implementation
643 * which needs some additional definitions here. They basically allow PIO
644 * space overall to be 1GB. This will work as long as we never try to use
645 * iomap to map MMIO below 1GB which should be fine on ppc64
647 #define HAVE_ARCH_PIO_SIZE 1
648 #define PIO_OFFSET 0x00000000UL
649 #define PIO_MASK 0x3fffffffUL
650 #define PIO_RESERVED 0x40000000UL
652 #define mmio_read16be(addr) readw_be(addr)
653 #define mmio_read32be(addr) readl_be(addr)
654 #define mmio_write16be(val, addr) writew_be(val, addr)
655 #define mmio_write32be(val, addr) writel_be(val, addr)
656 #define mmio_insb(addr, dst, count) readsb(addr, dst, count)
657 #define mmio_insw(addr, dst, count) readsw(addr, dst, count)
658 #define mmio_insl(addr, dst, count) readsl(addr, dst, count)
659 #define mmio_outsb(addr, src, count) writesb(addr, src, count)
660 #define mmio_outsw(addr, src, count) writesw(addr, src, count)
661 #define mmio_outsl(addr, src, count) writesl(addr, src, count)
664 * virt_to_phys - map virtual addresses to physical
665 * @address: address to remap
667 * The returned physical address is the physical (CPU) mapping for
668 * the memory address given. It is only valid to use this function on
669 * addresses directly mapped or allocated via kmalloc.
671 * This function does not give bus mappings for DMA transfers. In
672 * almost all conceivable cases a device driver should not be using
675 static inline unsigned long virt_to_phys(volatile void * address)
677 return __pa((unsigned long)address);
681 * phys_to_virt - map physical address to virtual
682 * @address: address to remap
684 * The returned virtual address is a current CPU mapping for
685 * the memory address given. It is only valid to use this function on
686 * addresses that have a kernel mapping
688 * This function does not handle bus mappings for DMA transfers. In
689 * almost all conceivable cases a device driver should not be using
692 static inline void * phys_to_virt(unsigned long address)
694 return (void *)__va(address);
698 * Change "struct page" to physical address.
700 #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
702 /* We do NOT want virtual merging, it would put too much pressure on
703 * our iommu allocator. Instead, we want drivers to be smart enough
704 * to coalesce sglists that happen to have been mapped in a contiguous
707 #define BIO_VMERGE_BOUNDARY 0
710 * 32 bits still uses virt_to_bus() for it's implementation of DMA
711 * mappings se we have to keep it defined here. We also have some old
712 * drivers (shame shame shame) that use bus_to_virt() and haven't been
713 * fixed yet so I need to define it here.
717 static inline unsigned long virt_to_bus(volatile void * address)
721 return __pa(address) + PCI_DRAM_OFFSET;
724 static inline void * bus_to_virt(unsigned long address)
728 return __va(address - PCI_DRAM_OFFSET);
731 #define page_to_bus(page) (page_to_phys(page) + PCI_DRAM_OFFSET)
733 #endif /* CONFIG_PPC32 */
736 #define setbits32(_addr, _v) out_be32((_addr), in_be32(_addr) | (_v))
737 #define clrbits32(_addr, _v) out_be32((_addr), in_be32(_addr) & ~(_v))
739 #define setbits16(_addr, _v) out_be16((_addr), in_be16(_addr) | (_v))
740 #define clrbits16(_addr, _v) out_be16((_addr), in_be16(_addr) & ~(_v))
742 #endif /* __KERNEL__ */
744 #endif /* _ASM_POWERPC_IO_H */