1 #ifndef _ASM_POWERPC_IO_H
2 #define _ASM_POWERPC_IO_H
5 #define ARCH_HAS_IOREMAP_WC
7 #define ARCH_HAS_IOREMAP_WT
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
17 /* Check of existence of legacy devices */
18 extern int check_legacy_ioport(unsigned long base_port);
19 #define I8042_DATA_REG 0x60
20 #define FDC_BASE 0x3f0
22 #if defined(CONFIG_PPC64) && defined(CONFIG_PCI)
23 extern struct pci_dev *isa_bridge_pcidev;
25 * has legacy ISA devices ?
27 #define arch_has_dev_port() (isa_bridge_pcidev != NULL || isa_io_special)
30 #include <linux/device.h>
31 #include <linux/compiler.h>
34 #include <asm/byteorder.h>
35 #include <asm/synch.h>
36 #include <asm/delay.h>
38 #include <asm/ppc_asm.h>
39 #include <asm/pgtable.h>
45 #define SIO_CONFIG_RA 0x398
46 #define SIO_CONFIG_RD 0x399
50 /* 32 bits uses slightly different variables for the various IO
51 * bases. Most of this file only uses _IO_BASE though which we
52 * define properly based on the platform
56 #define _ISA_MEM_BASE 0
57 #define PCI_DRAM_OFFSET 0
58 #elif defined(CONFIG_PPC32)
59 #define _IO_BASE isa_io_base
60 #define _ISA_MEM_BASE isa_mem_base
61 #define PCI_DRAM_OFFSET pci_dram_offset
63 #define _IO_BASE pci_io_base
64 #define _ISA_MEM_BASE isa_mem_base
65 #define PCI_DRAM_OFFSET 0
68 extern unsigned long isa_io_base;
69 extern unsigned long pci_io_base;
70 extern unsigned long pci_dram_offset;
72 extern resource_size_t isa_mem_base;
74 /* Boolean set by platform if PIO accesses are suppored while _IO_BASE
75 * is not set or addresses cannot be translated to MMIO. This is typically
76 * set when the platform supports "special" PIO accesses via a non memory
77 * mapped mechanism, and allows things like the early udbg UART code to
80 extern bool isa_io_special;
83 #if defined(CONFIG_PPC_INDIRECT_PIO) || defined(CONFIG_PPC_INDIRECT_MMIO)
84 #error CONFIG_PPC_INDIRECT_{PIO,MMIO} are not yet supported on 32 bits
90 * Low level MMIO accessors
92 * This provides the non-bus specific accessors to MMIO. Those are PowerPC
93 * specific and thus shouldn't be used in generic code. The accessors
96 * in_8, in_le16, in_be16, in_le32, in_be32, in_le64, in_be64
97 * out_8, out_le16, out_be16, out_le32, out_be32, out_le64, out_be64
98 * _insb, _insw_ns, _insl_ns, _outsb, _outsw_ns, _outsl_ns
100 * Those operate directly on a kernel virtual address. Note that the prototype
101 * for the out_* accessors has the arguments in opposite order from the usual
102 * linux PCI accessors. Unlike those, they take the address first and the value
105 * Note: I might drop the _ns suffix on the stream operations soon as it is
106 * simply normal for stream operations to not swap in the first place.
111 #define IO_SET_SYNC_FLAG() do { local_paca->io_sync = 1; } while(0)
113 #define IO_SET_SYNC_FLAG()
116 #define DEF_MMIO_IN_X(name, size, insn) \
117 static inline u##size name(const volatile u##size __iomem *addr) \
120 __asm__ __volatile__("sync;"#insn" %0,%y1;twi 0,%0,0;isync" \
121 : "=r" (ret) : "Z" (*addr) : "memory"); \
125 #define DEF_MMIO_OUT_X(name, size, insn) \
126 static inline void name(volatile u##size __iomem *addr, u##size val) \
128 __asm__ __volatile__("sync;"#insn" %1,%y0" \
129 : "=Z" (*addr) : "r" (val) : "memory"); \
130 IO_SET_SYNC_FLAG(); \
133 #define DEF_MMIO_IN_D(name, size, insn) \
134 static inline u##size name(const volatile u##size __iomem *addr) \
137 __asm__ __volatile__("sync;"#insn"%U1%X1 %0,%1;twi 0,%0,0;isync"\
138 : "=r" (ret) : "m" (*addr) : "memory"); \
142 #define DEF_MMIO_OUT_D(name, size, insn) \
143 static inline void name(volatile u##size __iomem *addr, u##size val) \
145 __asm__ __volatile__("sync;"#insn"%U0%X0 %1,%0" \
146 : "=m" (*addr) : "r" (val) : "memory"); \
147 IO_SET_SYNC_FLAG(); \
150 DEF_MMIO_IN_D(in_8, 8, lbz);
151 DEF_MMIO_OUT_D(out_8, 8, stb);
153 #ifdef __BIG_ENDIAN__
154 DEF_MMIO_IN_D(in_be16, 16, lhz);
155 DEF_MMIO_IN_D(in_be32, 32, lwz);
156 DEF_MMIO_IN_X(in_le16, 16, lhbrx);
157 DEF_MMIO_IN_X(in_le32, 32, lwbrx);
159 DEF_MMIO_OUT_D(out_be16, 16, sth);
160 DEF_MMIO_OUT_D(out_be32, 32, stw);
161 DEF_MMIO_OUT_X(out_le16, 16, sthbrx);
162 DEF_MMIO_OUT_X(out_le32, 32, stwbrx);
164 DEF_MMIO_IN_X(in_be16, 16, lhbrx);
165 DEF_MMIO_IN_X(in_be32, 32, lwbrx);
166 DEF_MMIO_IN_D(in_le16, 16, lhz);
167 DEF_MMIO_IN_D(in_le32, 32, lwz);
169 DEF_MMIO_OUT_X(out_be16, 16, sthbrx);
170 DEF_MMIO_OUT_X(out_be32, 32, stwbrx);
171 DEF_MMIO_OUT_D(out_le16, 16, sth);
172 DEF_MMIO_OUT_D(out_le32, 32, stw);
174 #endif /* __BIG_ENDIAN */
178 #ifdef __BIG_ENDIAN__
179 DEF_MMIO_OUT_D(out_be64, 64, std);
180 DEF_MMIO_IN_D(in_be64, 64, ld);
182 /* There is no asm instructions for 64 bits reverse loads and stores */
183 static inline u64 in_le64(const volatile u64 __iomem *addr)
185 return swab64(in_be64(addr));
188 static inline void out_le64(volatile u64 __iomem *addr, u64 val)
190 out_be64(addr, swab64(val));
193 DEF_MMIO_OUT_D(out_le64, 64, std);
194 DEF_MMIO_IN_D(in_le64, 64, ld);
196 /* There is no asm instructions for 64 bits reverse loads and stores */
197 static inline u64 in_be64(const volatile u64 __iomem *addr)
199 return swab64(in_le64(addr));
202 static inline void out_be64(volatile u64 __iomem *addr, u64 val)
204 out_le64(addr, swab64(val));
208 #endif /* __powerpc64__ */
211 * Low level IO stream instructions are defined out of line for now
213 extern void _insb(const volatile u8 __iomem *addr, void *buf, long count);
214 extern void _outsb(volatile u8 __iomem *addr,const void *buf,long count);
215 extern void _insw_ns(const volatile u16 __iomem *addr, void *buf, long count);
216 extern void _outsw_ns(volatile u16 __iomem *addr, const void *buf, long count);
217 extern void _insl_ns(const volatile u32 __iomem *addr, void *buf, long count);
218 extern void _outsl_ns(volatile u32 __iomem *addr, const void *buf, long count);
220 /* The _ns naming is historical and will be removed. For now, just #define
221 * the non _ns equivalent names
223 #define _insw _insw_ns
224 #define _insl _insl_ns
225 #define _outsw _outsw_ns
226 #define _outsl _outsl_ns
230 * memset_io, memcpy_toio, memcpy_fromio base implementations are out of line
233 extern void _memset_io(volatile void __iomem *addr, int c, unsigned long n);
234 extern void _memcpy_fromio(void *dest, const volatile void __iomem *src,
236 extern void _memcpy_toio(volatile void __iomem *dest, const void *src,
241 * PCI and standard ISA accessors
243 * Those are globally defined linux accessors for devices on PCI or ISA
244 * busses. They follow the Linux defined semantics. The current implementation
245 * for PowerPC is as close as possible to the x86 version of these, and thus
246 * provides fairly heavy weight barriers for the non-raw versions
248 * In addition, they support a hook mechanism when CONFIG_PPC_INDIRECT_MMIO
249 * or CONFIG_PPC_INDIRECT_PIO are set allowing the platform to provide its
250 * own implementation of some or all of the accessors.
254 * Include the EEH definitions when EEH is enabled only so they don't get
255 * in the way when building for 32 bits
261 /* Shortcut to the MMIO argument pointer */
262 #define PCI_IO_ADDR volatile void __iomem *
264 /* Indirect IO address tokens:
266 * When CONFIG_PPC_INDIRECT_MMIO is set, the platform can provide hooks
267 * on all MMIOs. (Note that this is all 64 bits only for now)
269 * To help platforms who may need to differentiate MMIO addresses in
270 * their hooks, a bitfield is reserved for use by the platform near the
271 * top of MMIO addresses (not PIO, those have to cope the hard way).
273 * The highest address in the kernel virtual space are:
275 * d0003fffffffffff # with Hash MMU
276 * c00fffffffffffff # with Radix MMU
278 * The top 4 bits are reserved as the region ID on hash, leaving us 8 bits
279 * that can be used for the field.
281 * The direct IO mapping operations will then mask off those bits
282 * before doing the actual access, though that only happen when
283 * CONFIG_PPC_INDIRECT_MMIO is set, thus be careful when you use that
286 * For PIO, there is a separate CONFIG_PPC_INDIRECT_PIO which makes
287 * all PIO functions call through a hook.
290 #ifdef CONFIG_PPC_INDIRECT_MMIO
291 #define PCI_IO_IND_TOKEN_SHIFT 52
292 #define PCI_IO_IND_TOKEN_MASK (0xfful << PCI_IO_IND_TOKEN_SHIFT)
293 #define PCI_FIX_ADDR(addr) \
294 ((PCI_IO_ADDR)(((unsigned long)(addr)) & ~PCI_IO_IND_TOKEN_MASK))
295 #define PCI_GET_ADDR_TOKEN(addr) \
296 (((unsigned long)(addr) & PCI_IO_IND_TOKEN_MASK) >> \
297 PCI_IO_IND_TOKEN_SHIFT)
298 #define PCI_SET_ADDR_TOKEN(addr, token) \
300 unsigned long __a = (unsigned long)(addr); \
301 __a &= ~PCI_IO_IND_TOKEN_MASK; \
302 __a |= ((unsigned long)(token)) << PCI_IO_IND_TOKEN_SHIFT; \
303 (addr) = (void __iomem *)__a; \
306 #define PCI_FIX_ADDR(addr) (addr)
311 * Non ordered and non-swapping "raw" accessors
314 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
316 return *(volatile unsigned char __force *)PCI_FIX_ADDR(addr);
318 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
320 return *(volatile unsigned short __force *)PCI_FIX_ADDR(addr);
322 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
324 return *(volatile unsigned int __force *)PCI_FIX_ADDR(addr);
326 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
328 *(volatile unsigned char __force *)PCI_FIX_ADDR(addr) = v;
330 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
332 *(volatile unsigned short __force *)PCI_FIX_ADDR(addr) = v;
334 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
336 *(volatile unsigned int __force *)PCI_FIX_ADDR(addr) = v;
340 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
342 return *(volatile unsigned long __force *)PCI_FIX_ADDR(addr);
344 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
346 *(volatile unsigned long __force *)PCI_FIX_ADDR(addr) = v;
349 static inline void __raw_writeq_be(unsigned long v, volatile void __iomem *addr)
351 __raw_writeq((__force unsigned long)cpu_to_be64(v), addr);
355 * Real mode versions of the above. Those instructions are only supposed
356 * to be used in hypervisor real mode as per the architecture spec.
358 static inline void __raw_rm_writeb(u8 val, volatile void __iomem *paddr)
360 __asm__ __volatile__("stbcix %0,0,%1"
361 : : "r" (val), "r" (paddr) : "memory");
364 static inline void __raw_rm_writew(u16 val, volatile void __iomem *paddr)
366 __asm__ __volatile__("sthcix %0,0,%1"
367 : : "r" (val), "r" (paddr) : "memory");
370 static inline void __raw_rm_writel(u32 val, volatile void __iomem *paddr)
372 __asm__ __volatile__("stwcix %0,0,%1"
373 : : "r" (val), "r" (paddr) : "memory");
376 static inline void __raw_rm_writeq(u64 val, volatile void __iomem *paddr)
378 __asm__ __volatile__("stdcix %0,0,%1"
379 : : "r" (val), "r" (paddr) : "memory");
382 static inline void __raw_rm_writeq_be(u64 val, volatile void __iomem *paddr)
384 __raw_rm_writeq((__force u64)cpu_to_be64(val), paddr);
387 static inline u8 __raw_rm_readb(volatile void __iomem *paddr)
390 __asm__ __volatile__("lbzcix %0,0, %1"
391 : "=r" (ret) : "r" (paddr) : "memory");
395 static inline u16 __raw_rm_readw(volatile void __iomem *paddr)
398 __asm__ __volatile__("lhzcix %0,0, %1"
399 : "=r" (ret) : "r" (paddr) : "memory");
403 static inline u32 __raw_rm_readl(volatile void __iomem *paddr)
406 __asm__ __volatile__("lwzcix %0,0, %1"
407 : "=r" (ret) : "r" (paddr) : "memory");
411 static inline u64 __raw_rm_readq(volatile void __iomem *paddr)
414 __asm__ __volatile__("ldcix %0,0, %1"
415 : "=r" (ret) : "r" (paddr) : "memory");
418 #endif /* __powerpc64__ */
422 * PCI PIO and MMIO accessors.
425 * On 32 bits, PIO operations have a recovery mechanism in case they trigger
426 * machine checks (which they occasionally do when probing non existing
427 * IO ports on some platforms, like PowerMac and 8xx).
428 * I always found it to be of dubious reliability and I am tempted to get
429 * rid of it one of these days. So if you think it's important to keep it,
430 * please voice up asap. We never had it for 64 bits and I do not intend
436 #define __do_in_asm(name, op) \
437 static inline unsigned int name(unsigned int port) \
440 __asm__ __volatile__( \
442 "0:" op " %0,0,%1\n" \
447 ".section .fixup,\"ax\"\n" \
456 : "r" (port + _IO_BASE) \
461 #define __do_out_asm(name, op) \
462 static inline void name(unsigned int val, unsigned int port) \
464 __asm__ __volatile__( \
466 "0:" op " %0,0,%1\n" \
471 : : "r" (val), "r" (port + _IO_BASE) \
475 __do_in_asm(_rec_inb, "lbzx")
476 __do_in_asm(_rec_inw, "lhbrx")
477 __do_in_asm(_rec_inl, "lwbrx")
478 __do_out_asm(_rec_outb, "stbx")
479 __do_out_asm(_rec_outw, "sthbrx")
480 __do_out_asm(_rec_outl, "stwbrx")
482 #endif /* CONFIG_PPC32 */
484 /* The "__do_*" operations below provide the actual "base" implementation
485 * for each of the defined accessors. Some of them use the out_* functions
486 * directly, some of them still use EEH, though we might change that in the
487 * future. Those macros below provide the necessary argument swapping and
488 * handling of the IO base for PIO.
490 * They are themselves used by the macros that define the actual accessors
491 * and can be used by the hooks if any.
493 * Note that PIO operations are always defined in terms of their corresonding
494 * MMIO operations. That allows platforms like iSeries who want to modify the
495 * behaviour of both to only hook on the MMIO version and get both. It's also
496 * possible to hook directly at the toplevel PIO operation if they have to
497 * be handled differently
499 #define __do_writeb(val, addr) out_8(PCI_FIX_ADDR(addr), val)
500 #define __do_writew(val, addr) out_le16(PCI_FIX_ADDR(addr), val)
501 #define __do_writel(val, addr) out_le32(PCI_FIX_ADDR(addr), val)
502 #define __do_writeq(val, addr) out_le64(PCI_FIX_ADDR(addr), val)
503 #define __do_writew_be(val, addr) out_be16(PCI_FIX_ADDR(addr), val)
504 #define __do_writel_be(val, addr) out_be32(PCI_FIX_ADDR(addr), val)
505 #define __do_writeq_be(val, addr) out_be64(PCI_FIX_ADDR(addr), val)
508 #define __do_readb(addr) eeh_readb(PCI_FIX_ADDR(addr))
509 #define __do_readw(addr) eeh_readw(PCI_FIX_ADDR(addr))
510 #define __do_readl(addr) eeh_readl(PCI_FIX_ADDR(addr))
511 #define __do_readq(addr) eeh_readq(PCI_FIX_ADDR(addr))
512 #define __do_readw_be(addr) eeh_readw_be(PCI_FIX_ADDR(addr))
513 #define __do_readl_be(addr) eeh_readl_be(PCI_FIX_ADDR(addr))
514 #define __do_readq_be(addr) eeh_readq_be(PCI_FIX_ADDR(addr))
515 #else /* CONFIG_EEH */
516 #define __do_readb(addr) in_8(PCI_FIX_ADDR(addr))
517 #define __do_readw(addr) in_le16(PCI_FIX_ADDR(addr))
518 #define __do_readl(addr) in_le32(PCI_FIX_ADDR(addr))
519 #define __do_readq(addr) in_le64(PCI_FIX_ADDR(addr))
520 #define __do_readw_be(addr) in_be16(PCI_FIX_ADDR(addr))
521 #define __do_readl_be(addr) in_be32(PCI_FIX_ADDR(addr))
522 #define __do_readq_be(addr) in_be64(PCI_FIX_ADDR(addr))
523 #endif /* !defined(CONFIG_EEH) */
526 #define __do_outb(val, port) _rec_outb(val, port)
527 #define __do_outw(val, port) _rec_outw(val, port)
528 #define __do_outl(val, port) _rec_outl(val, port)
529 #define __do_inb(port) _rec_inb(port)
530 #define __do_inw(port) _rec_inw(port)
531 #define __do_inl(port) _rec_inl(port)
532 #else /* CONFIG_PPC32 */
533 #define __do_outb(val, port) writeb(val,(PCI_IO_ADDR)_IO_BASE+port);
534 #define __do_outw(val, port) writew(val,(PCI_IO_ADDR)_IO_BASE+port);
535 #define __do_outl(val, port) writel(val,(PCI_IO_ADDR)_IO_BASE+port);
536 #define __do_inb(port) readb((PCI_IO_ADDR)_IO_BASE + port);
537 #define __do_inw(port) readw((PCI_IO_ADDR)_IO_BASE + port);
538 #define __do_inl(port) readl((PCI_IO_ADDR)_IO_BASE + port);
539 #endif /* !CONFIG_PPC32 */
542 #define __do_readsb(a, b, n) eeh_readsb(PCI_FIX_ADDR(a), (b), (n))
543 #define __do_readsw(a, b, n) eeh_readsw(PCI_FIX_ADDR(a), (b), (n))
544 #define __do_readsl(a, b, n) eeh_readsl(PCI_FIX_ADDR(a), (b), (n))
545 #else /* CONFIG_EEH */
546 #define __do_readsb(a, b, n) _insb(PCI_FIX_ADDR(a), (b), (n))
547 #define __do_readsw(a, b, n) _insw(PCI_FIX_ADDR(a), (b), (n))
548 #define __do_readsl(a, b, n) _insl(PCI_FIX_ADDR(a), (b), (n))
549 #endif /* !CONFIG_EEH */
550 #define __do_writesb(a, b, n) _outsb(PCI_FIX_ADDR(a),(b),(n))
551 #define __do_writesw(a, b, n) _outsw(PCI_FIX_ADDR(a),(b),(n))
552 #define __do_writesl(a, b, n) _outsl(PCI_FIX_ADDR(a),(b),(n))
554 #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
555 #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
556 #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
557 #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
558 #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
559 #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
561 #define __do_memset_io(addr, c, n) \
562 _memset_io(PCI_FIX_ADDR(addr), c, n)
563 #define __do_memcpy_toio(dst, src, n) \
564 _memcpy_toio(PCI_FIX_ADDR(dst), src, n)
567 #define __do_memcpy_fromio(dst, src, n) \
568 eeh_memcpy_fromio(dst, PCI_FIX_ADDR(src), n)
569 #else /* CONFIG_EEH */
570 #define __do_memcpy_fromio(dst, src, n) \
571 _memcpy_fromio(dst,PCI_FIX_ADDR(src),n)
572 #endif /* !CONFIG_EEH */
574 #ifdef CONFIG_PPC_INDIRECT_PIO
575 #define DEF_PCI_HOOK_pio(x) x
577 #define DEF_PCI_HOOK_pio(x) NULL
580 #ifdef CONFIG_PPC_INDIRECT_MMIO
581 #define DEF_PCI_HOOK_mem(x) x
583 #define DEF_PCI_HOOK_mem(x) NULL
586 /* Structure containing all the hooks */
587 extern struct ppc_pci_io {
589 #define DEF_PCI_AC_RET(name, ret, at, al, space, aa) ret (*name) at;
590 #define DEF_PCI_AC_NORET(name, at, al, space, aa) void (*name) at;
592 #include <asm/io-defs.h>
594 #undef DEF_PCI_AC_RET
595 #undef DEF_PCI_AC_NORET
599 /* The inline wrappers */
600 #define DEF_PCI_AC_RET(name, ret, at, al, space, aa) \
601 static inline ret name at \
603 if (DEF_PCI_HOOK_##space(ppc_pci_io.name) != NULL) \
604 return ppc_pci_io.name al; \
605 return __do_##name al; \
608 #define DEF_PCI_AC_NORET(name, at, al, space, aa) \
609 static inline void name at \
611 if (DEF_PCI_HOOK_##space(ppc_pci_io.name) != NULL) \
612 ppc_pci_io.name al; \
617 #include <asm/io-defs.h>
619 #undef DEF_PCI_AC_RET
620 #undef DEF_PCI_AC_NORET
622 /* Some drivers check for the presence of readq & writeq with
623 * a #ifdef, so we make them happy here.
627 #define writeq writeq
631 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
634 #define xlate_dev_mem_ptr(p) __va(p)
637 * Convert a virtual cached pointer to an uncached pointer
639 #define xlate_dev_kmem_ptr(p) p
642 * We don't do relaxed operations yet, at least not with this semantic
644 #define readb_relaxed(addr) readb(addr)
645 #define readw_relaxed(addr) readw(addr)
646 #define readl_relaxed(addr) readl(addr)
647 #define readq_relaxed(addr) readq(addr)
648 #define writeb_relaxed(v, addr) writeb(v, addr)
649 #define writew_relaxed(v, addr) writew(v, addr)
650 #define writel_relaxed(v, addr) writel(v, addr)
651 #define writeq_relaxed(v, addr) writeq(v, addr)
653 #include <asm-generic/iomap.h>
659 * Enforce synchronisation of stores vs. spin_unlock
660 * (this does it explicitly, though our implementation of spin_unlock
661 * does it implicitely too)
663 static inline void mmiowb(void)
667 __asm__ __volatile__("sync; li %0,0; stb %0,%1(13)"
668 : "=&r" (tmp) : "i" (offsetof(struct paca_struct, io_sync))
671 #endif /* !CONFIG_PPC32 */
673 static inline void iosync(void)
675 __asm__ __volatile__ ("sync" : : : "memory");
678 /* Enforce in-order execution of data I/O.
679 * No distinction between read/write on PPC; use eieio for all three.
680 * Those are fairly week though. They don't provide a barrier between
681 * MMIO and cacheable storage nor do they provide a barrier vs. locks,
682 * they only provide barriers between 2 __raw MMIO operations and
683 * possibly break write combining.
685 #define iobarrier_rw() eieio()
686 #define iobarrier_r() eieio()
687 #define iobarrier_w() eieio()
691 * output pause versions need a delay at least for the
692 * w83c105 ide controller in a p610.
694 #define inb_p(port) inb(port)
695 #define outb_p(val, port) (udelay(1), outb((val), (port)))
696 #define inw_p(port) inw(port)
697 #define outw_p(val, port) (udelay(1), outw((val), (port)))
698 #define inl_p(port) inl(port)
699 #define outl_p(val, port) (udelay(1), outl((val), (port)))
702 #define IO_SPACE_LIMIT ~(0UL)
706 * ioremap - map bus memory into CPU space
707 * @address: bus address of the memory
708 * @size: size of the resource to map
710 * ioremap performs a platform specific sequence of operations to
711 * make bus memory CPU accessible via the readb/readw/readl/writeb/
712 * writew/writel functions and the other mmio helpers. The returned
713 * address is not guaranteed to be usable directly as a virtual
716 * We provide a few variations of it:
718 * * ioremap is the standard one and provides non-cacheable guarded mappings
719 * and can be hooked by the platform via ppc_md
721 * * ioremap_prot allows to specify the page flags as an argument and can
722 * also be hooked by the platform via ppc_md.
724 * * ioremap_nocache is identical to ioremap
726 * * ioremap_wc enables write combining
728 * * ioremap_wt enables write through
730 * * ioremap_coherent maps coherent cached memory
732 * * iounmap undoes such a mapping and can be hooked
734 * * __ioremap_at (and the pending __iounmap_at) are low level functions to
735 * create hand-made mappings for use only by the PCI code and cannot
736 * currently be hooked. Must be page aligned.
738 * * __ioremap is the low level implementation used by ioremap and
739 * ioremap_prot and cannot be hooked (but can be used by a hook on one
740 * of the previous ones)
742 * * __ioremap_caller is the same as above but takes an explicit caller
743 * reference rather than using __builtin_return_address(0)
745 * * __iounmap, is the low level implementation used by iounmap and cannot
746 * be hooked (but can be used by a hook on iounmap)
749 extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
750 extern void __iomem *ioremap_prot(phys_addr_t address, unsigned long size,
751 unsigned long flags);
752 extern void __iomem *ioremap_wc(phys_addr_t address, unsigned long size);
753 void __iomem *ioremap_wt(phys_addr_t address, unsigned long size);
754 void __iomem *ioremap_coherent(phys_addr_t address, unsigned long size);
755 #define ioremap_nocache(addr, size) ioremap((addr), (size))
756 #define ioremap_uc(addr, size) ioremap((addr), (size))
757 #define ioremap_cache(addr, size) \
758 ioremap_prot((addr), (size), pgprot_val(PAGE_KERNEL))
760 extern void iounmap(volatile void __iomem *addr);
762 extern void __iomem *__ioremap(phys_addr_t, unsigned long size,
763 unsigned long flags);
764 extern void __iomem *__ioremap_caller(phys_addr_t, unsigned long size,
765 pgprot_t prot, void *caller);
767 extern void __iounmap(volatile void __iomem *addr);
769 extern void __iomem * __ioremap_at(phys_addr_t pa, void *ea,
770 unsigned long size, pgprot_t prot);
771 extern void __iounmap_at(void *ea, unsigned long size);
774 * When CONFIG_PPC_INDIRECT_PIO is set, we use the generic iomap implementation
775 * which needs some additional definitions here. They basically allow PIO
776 * space overall to be 1GB. This will work as long as we never try to use
777 * iomap to map MMIO below 1GB which should be fine on ppc64
779 #define HAVE_ARCH_PIO_SIZE 1
780 #define PIO_OFFSET 0x00000000UL
781 #define PIO_MASK (FULL_IO_SIZE - 1)
782 #define PIO_RESERVED (FULL_IO_SIZE)
784 #define mmio_read16be(addr) readw_be(addr)
785 #define mmio_read32be(addr) readl_be(addr)
786 #define mmio_read64be(addr) readq_be(addr)
787 #define mmio_write16be(val, addr) writew_be(val, addr)
788 #define mmio_write32be(val, addr) writel_be(val, addr)
789 #define mmio_write64be(val, addr) writeq_be(val, addr)
790 #define mmio_insb(addr, dst, count) readsb(addr, dst, count)
791 #define mmio_insw(addr, dst, count) readsw(addr, dst, count)
792 #define mmio_insl(addr, dst, count) readsl(addr, dst, count)
793 #define mmio_outsb(addr, src, count) writesb(addr, src, count)
794 #define mmio_outsw(addr, src, count) writesw(addr, src, count)
795 #define mmio_outsl(addr, src, count) writesl(addr, src, count)
798 * virt_to_phys - map virtual addresses to physical
799 * @address: address to remap
801 * The returned physical address is the physical (CPU) mapping for
802 * the memory address given. It is only valid to use this function on
803 * addresses directly mapped or allocated via kmalloc.
805 * This function does not give bus mappings for DMA transfers. In
806 * almost all conceivable cases a device driver should not be using
809 static inline unsigned long virt_to_phys(volatile void * address)
811 WARN_ON(IS_ENABLED(CONFIG_DEBUG_VIRTUAL) && !virt_addr_valid(address));
813 return __pa((unsigned long)address);
817 * phys_to_virt - map physical address to virtual
818 * @address: address to remap
820 * The returned virtual address is a current CPU mapping for
821 * the memory address given. It is only valid to use this function on
822 * addresses that have a kernel mapping
824 * This function does not handle bus mappings for DMA transfers. In
825 * almost all conceivable cases a device driver should not be using
828 static inline void * phys_to_virt(unsigned long address)
830 return (void *)__va(address);
834 * Change "struct page" to physical address.
836 static inline phys_addr_t page_to_phys(struct page *page)
838 unsigned long pfn = page_to_pfn(page);
840 WARN_ON(IS_ENABLED(CONFIG_DEBUG_VIRTUAL) && !pfn_valid(pfn));
842 return PFN_PHYS(pfn);
846 * 32 bits still uses virt_to_bus() for it's implementation of DMA
847 * mappings se we have to keep it defined here. We also have some old
848 * drivers (shame shame shame) that use bus_to_virt() and haven't been
849 * fixed yet so I need to define it here.
853 static inline unsigned long virt_to_bus(volatile void * address)
857 return __pa(address) + PCI_DRAM_OFFSET;
860 static inline void * bus_to_virt(unsigned long address)
864 return __va(address - PCI_DRAM_OFFSET);
867 #define page_to_bus(page) (page_to_phys(page) + PCI_DRAM_OFFSET)
869 #endif /* CONFIG_PPC32 */
872 #define setbits32(_addr, _v) out_be32((_addr), in_be32(_addr) | (_v))
873 #define clrbits32(_addr, _v) out_be32((_addr), in_be32(_addr) & ~(_v))
875 #define setbits16(_addr, _v) out_be16((_addr), in_be16(_addr) | (_v))
876 #define clrbits16(_addr, _v) out_be16((_addr), in_be16(_addr) & ~(_v))
878 #define setbits8(_addr, _v) out_8((_addr), in_8(_addr) | (_v))
879 #define clrbits8(_addr, _v) out_8((_addr), in_8(_addr) & ~(_v))
881 /* Clear and set bits in one shot. These macros can be used to clear and
882 * set multiple bits in a register using a single read-modify-write. These
883 * macros can also be used to set a multiple-bit bit pattern using a mask,
884 * by specifying the mask in the 'clear' parameter and the new bit pattern
885 * in the 'set' parameter.
888 #define clrsetbits(type, addr, clear, set) \
889 out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
892 #define clrsetbits_be64(addr, clear, set) clrsetbits(be64, addr, clear, set)
893 #define clrsetbits_le64(addr, clear, set) clrsetbits(le64, addr, clear, set)
896 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
897 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
899 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
900 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
902 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
904 #endif /* __KERNEL__ */
906 #endif /* _ASM_POWERPC_IO_H */