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Diffstat (limited to 'include/asm-powerpc/io.h')
| -rw-r--r-- | include/asm-powerpc/io.h | 787 |
1 files changed, 0 insertions, 787 deletions
diff --git a/include/asm-powerpc/io.h b/include/asm-powerpc/io.h deleted file mode 100644 index 77c7fa025e65..000000000000 --- a/include/asm-powerpc/io.h +++ /dev/null @@ -1,787 +0,0 @@ -#ifndef _ASM_POWERPC_IO_H -#define _ASM_POWERPC_IO_H -#ifdef __KERNEL__ - -/* - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -/* Check of existence of legacy devices */ -extern int check_legacy_ioport(unsigned long base_port); -#define I8042_DATA_REG 0x60 -#define FDC_BASE 0x3f0 -/* only relevant for PReP */ -#define _PIDXR 0x279 -#define _PNPWRP 0xa79 -#define PNPBIOS_BASE 0xf000 - -#include <linux/device.h> -#include <linux/io.h> - -#include <linux/compiler.h> -#include <asm/page.h> -#include <asm/byteorder.h> -#include <asm/synch.h> -#include <asm/delay.h> -#include <asm/mmu.h> - -#include <asm-generic/iomap.h> - -#ifdef CONFIG_PPC64 -#include <asm/paca.h> -#endif - -#define SIO_CONFIG_RA 0x398 -#define SIO_CONFIG_RD 0x399 - -#define SLOW_DOWN_IO - -/* 32 bits uses slightly different variables for the various IO - * bases. Most of this file only uses _IO_BASE though which we - * define properly based on the platform - */ -#ifndef CONFIG_PCI -#define _IO_BASE 0 -#define _ISA_MEM_BASE 0 -#define PCI_DRAM_OFFSET 0 -#elif defined(CONFIG_PPC32) -#define _IO_BASE isa_io_base -#define _ISA_MEM_BASE isa_mem_base -#define PCI_DRAM_OFFSET pci_dram_offset -#else -#define _IO_BASE pci_io_base -#define _ISA_MEM_BASE isa_mem_base -#define PCI_DRAM_OFFSET 0 -#endif - -extern unsigned long isa_io_base; -extern unsigned long pci_io_base; -extern unsigned long pci_dram_offset; - -extern resource_size_t isa_mem_base; - -#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_INDIRECT_IO) -#error CONFIG_PPC_INDIRECT_IO is not yet supported on 32 bits -#endif - -/* - * - * Low level MMIO accessors - * - * This provides the non-bus specific accessors to MMIO. Those are PowerPC - * specific and thus shouldn't be used in generic code. The accessors - * provided here are: - * - * in_8, in_le16, in_be16, in_le32, in_be32, in_le64, in_be64 - * out_8, out_le16, out_be16, out_le32, out_be32, out_le64, out_be64 - * _insb, _insw_ns, _insl_ns, _outsb, _outsw_ns, _outsl_ns - * - * Those operate directly on a kernel virtual address. Note that the prototype - * for the out_* accessors has the arguments in opposite order from the usual - * linux PCI accessors. Unlike those, they take the address first and the value - * next. - * - * Note: I might drop the _ns suffix on the stream operations soon as it is - * simply normal for stream operations to not swap in the first place. - * - */ - -#ifdef CONFIG_PPC64 -#define IO_SET_SYNC_FLAG() do { local_paca->io_sync = 1; } while(0) -#else -#define IO_SET_SYNC_FLAG() -#endif - -/* gcc 4.0 and older doesn't have 'Z' constraint */ -#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ == 0) -#define DEF_MMIO_IN_LE(name, size, insn) \ -static inline u##size name(const volatile u##size __iomem *addr) \ -{ \ - u##size ret; \ - __asm__ __volatile__("sync;"#insn" %0,0,%1;twi 0,%0,0;isync" \ - : "=r" (ret) : "r" (addr), "m" (*addr) : "memory"); \ - return ret; \ -} - -#define DEF_MMIO_OUT_LE(name, size, insn) \ -static inline void name(volatile u##size __iomem *addr, u##size val) \ -{ \ - __asm__ __volatile__("sync;"#insn" %1,0,%2" \ - : "=m" (*addr) : "r" (val), "r" (addr) : "memory"); \ - IO_SET_SYNC_FLAG(); \ -} -#else /* newer gcc */ -#define DEF_MMIO_IN_LE(name, size, insn) \ -static inline u##size name(const volatile u##size __iomem *addr) \ -{ \ - u##size ret; \ - __asm__ __volatile__("sync;"#insn" %0,%y1;twi 0,%0,0;isync" \ - : "=r" (ret) : "Z" (*addr) : "memory"); \ - return ret; \ -} - -#define DEF_MMIO_OUT_LE(name, size, insn) \ -static inline void name(volatile u##size __iomem *addr, u##size val) \ -{ \ - __asm__ __volatile__("sync;"#insn" %1,%y0" \ - : "=Z" (*addr) : "r" (val) : "memory"); \ - IO_SET_SYNC_FLAG(); \ -} -#endif - -#define DEF_MMIO_IN_BE(name, size, insn) \ -static inline u##size name(const volatile u##size __iomem *addr) \ -{ \ - u##size ret; \ - __asm__ __volatile__("sync;"#insn"%U1%X1 %0,%1;twi 0,%0,0;isync"\ - : "=r" (ret) : "m" (*addr) : "memory"); \ - return ret; \ -} - -#define DEF_MMIO_OUT_BE(name, size, insn) \ -static inline void name(volatile u##size __iomem *addr, u##size val) \ -{ \ - __asm__ __volatile__("sync;"#insn"%U0%X0 %1,%0" \ - : "=m" (*addr) : "r" (val) : "memory"); \ - IO_SET_SYNC_FLAG(); \ -} - - -DEF_MMIO_IN_BE(in_8, 8, lbz); -DEF_MMIO_IN_BE(in_be16, 16, lhz); -DEF_MMIO_IN_BE(in_be32, 32, lwz); -DEF_MMIO_IN_LE(in_le16, 16, lhbrx); -DEF_MMIO_IN_LE(in_le32, 32, lwbrx); - -DEF_MMIO_OUT_BE(out_8, 8, stb); -DEF_MMIO_OUT_BE(out_be16, 16, sth); -DEF_MMIO_OUT_BE(out_be32, 32, stw); -DEF_MMIO_OUT_LE(out_le16, 16, sthbrx); -DEF_MMIO_OUT_LE(out_le32, 32, stwbrx); - -#ifdef __powerpc64__ -DEF_MMIO_OUT_BE(out_be64, 64, std); -DEF_MMIO_IN_BE(in_be64, 64, ld); - -/* There is no asm instructions for 64 bits reverse loads and stores */ -static inline u64 in_le64(const volatile u64 __iomem *addr) -{ - return swab64(in_be64(addr)); -} - -static inline void out_le64(volatile u64 __iomem *addr, u64 val) -{ - out_be64(addr, swab64(val)); -} -#endif /* __powerpc64__ */ - -/* - * Low level IO stream instructions are defined out of line for now - */ -extern void _insb(const volatile u8 __iomem *addr, void *buf, long count); -extern void _outsb(volatile u8 __iomem *addr,const void *buf,long count); -extern void _insw_ns(const volatile u16 __iomem *addr, void *buf, long count); -extern void _outsw_ns(volatile u16 __iomem *addr, const void *buf, long count); -extern void _insl_ns(const volatile u32 __iomem *addr, void *buf, long count); -extern void _outsl_ns(volatile u32 __iomem *addr, const void *buf, long count); - -/* The _ns naming is historical and will be removed. For now, just #define - * the non _ns equivalent names - */ -#define _insw _insw_ns -#define _insl _insl_ns -#define _outsw _outsw_ns -#define _outsl _outsl_ns - - -/* - * memset_io, memcpy_toio, memcpy_fromio base implementations are out of line - */ - -extern void _memset_io(volatile void __iomem *addr, int c, unsigned long n); -extern void _memcpy_fromio(void *dest, const volatile void __iomem *src, - unsigned long n); -extern void _memcpy_toio(volatile void __iomem *dest, const void *src, - unsigned long n); - -/* - * - * PCI and standard ISA accessors - * - * Those are globally defined linux accessors for devices on PCI or ISA - * busses. They follow the Linux defined semantics. The current implementation - * for PowerPC is as close as possible to the x86 version of these, and thus - * provides fairly heavy weight barriers for the non-raw versions - * - * In addition, they support a hook mechanism when CONFIG_PPC_INDIRECT_IO - * allowing the platform to provide its own implementation of some or all - * of the accessors. - */ - -/* - * Include the EEH definitions when EEH is enabled only so they don't get - * in the way when building for 32 bits - */ -#ifdef CONFIG_EEH -#include <asm/eeh.h> -#endif - -/* Shortcut to the MMIO argument pointer */ -#define PCI_IO_ADDR volatile void __iomem * - -/* Indirect IO address tokens: - * - * When CONFIG_PPC_INDIRECT_IO is set, the platform can provide hooks - * on all IOs. (Note that this is all 64 bits only for now) - * - * To help platforms who may need to differenciate MMIO addresses in - * their hooks, a bitfield is reserved for use by the platform near the - * top of MMIO addresses (not PIO, those have to cope the hard way). - * - * This bit field is 12 bits and is at the top of the IO virtual - * addresses PCI_IO_INDIRECT_TOKEN_MASK. - * - * The kernel virtual space is thus: - * - * 0xD000000000000000 : vmalloc - * 0xD000080000000000 : PCI PHB IO space - * 0xD000080080000000 : ioremap - * 0xD0000fffffffffff : end of ioremap region - * - * Since the top 4 bits are reserved as the region ID, we use thus - * the next 12 bits and keep 4 bits available for the future if the - * virtual address space is ever to be extended. - * - * The direct IO mapping operations will then mask off those bits - * before doing the actual access, though that only happen when - * CONFIG_PPC_INDIRECT_IO is set, thus be careful when you use that - * mechanism - */ - -#ifdef CONFIG_PPC_INDIRECT_IO -#define PCI_IO_IND_TOKEN_MASK 0x0fff000000000000ul -#define PCI_IO_IND_TOKEN_SHIFT 48 -#define PCI_FIX_ADDR(addr) \ - ((PCI_IO_ADDR)(((unsigned long)(addr)) & ~PCI_IO_IND_TOKEN_MASK)) -#define PCI_GET_ADDR_TOKEN(addr) \ - (((unsigned long)(addr) & PCI_IO_IND_TOKEN_MASK) >> \ - PCI_IO_IND_TOKEN_SHIFT) -#define PCI_SET_ADDR_TOKEN(addr, token) \ -do { \ - unsigned long __a = (unsigned long)(addr); \ - __a &= ~PCI_IO_IND_TOKEN_MASK; \ - __a |= ((unsigned long)(token)) << PCI_IO_IND_TOKEN_SHIFT; \ - (addr) = (void __iomem *)__a; \ -} while(0) -#else -#define PCI_FIX_ADDR(addr) (addr) -#endif - - -/* - * Non ordered and non-swapping "raw" accessors - */ - -static inline unsigned char __raw_readb(const volatile void __iomem *addr) -{ - return *(volatile unsigned char __force *)PCI_FIX_ADDR(addr); -} -static inline unsigned short __raw_readw(const volatile void __iomem *addr) -{ - return *(volatile unsigned short __force *)PCI_FIX_ADDR(addr); -} -static inline unsigned int __raw_readl(const volatile void __iomem *addr) -{ - return *(volatile unsigned int __force *)PCI_FIX_ADDR(addr); -} -static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr) -{ - *(volatile unsigned char __force *)PCI_FIX_ADDR(addr) = v; -} -static inline void __raw_writew(unsigned short v, volatile void __iomem *addr) -{ - *(volatile unsigned short __force *)PCI_FIX_ADDR(addr) = v; -} -static inline void __raw_writel(unsigned int v, volatile void __iomem *addr) -{ - *(volatile unsigned int __force *)PCI_FIX_ADDR(addr) = v; -} - -#ifdef __powerpc64__ -static inline unsigned long __raw_readq(const volatile void __iomem *addr) -{ - return *(volatile unsigned long __force *)PCI_FIX_ADDR(addr); -} -static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr) -{ - *(volatile unsigned long __force *)PCI_FIX_ADDR(addr) = v; -} -#endif /* __powerpc64__ */ - -/* - * - * PCI PIO and MMIO accessors. - * - * - * On 32 bits, PIO operations have a recovery mechanism in case they trigger - * machine checks (which they occasionally do when probing non existing - * IO ports on some platforms, like PowerMac and 8xx). - * I always found it to be of dubious reliability and I am tempted to get - * rid of it one of these days. So if you think it's important to keep it, - * please voice up asap. We never had it for 64 bits and I do not intend - * to port it over - */ - -#ifdef CONFIG_PPC32 - -#define __do_in_asm(name, op) \ -static inline unsigned int name(unsigned int port) \ -{ \ - unsigned int x; \ - __asm__ __volatile__( \ - "sync\n" \ - "0:" op " %0,0,%1\n" \ - "1: twi 0,%0,0\n" \ - "2: isync\n" \ - "3: nop\n" \ - "4:\n" \ - ".section .fixup,\"ax\"\n" \ - "5: li %0,-1\n" \ - " b 4b\n" \ - ".previous\n" \ - ".section __ex_table,\"a\"\n" \ - " .align 2\n" \ - " .long 0b,5b\n" \ - " .long 1b,5b\n" \ - " .long 2b,5b\n" \ - " .long 3b,5b\n" \ - ".previous" \ - : "=&r" (x) \ - : "r" (port + _IO_BASE) \ - : "memory"); \ - return x; \ -} - -#define __do_out_asm(name, op) \ -static inline void name(unsigned int val, unsigned int port) \ -{ \ - __asm__ __volatile__( \ - "sync\n" \ - "0:" op " %0,0,%1\n" \ - "1: sync\n" \ - "2:\n" \ - ".section __ex_table,\"a\"\n" \ - " .align 2\n" \ - " .long 0b,2b\n" \ - " .long 1b,2b\n" \ - ".previous" \ - : : "r" (val), "r" (port + _IO_BASE) \ - : "memory"); \ -} - -__do_in_asm(_rec_inb, "lbzx") -__do_in_asm(_rec_inw, "lhbrx") -__do_in_asm(_rec_inl, "lwbrx") -__do_out_asm(_rec_outb, "stbx") -__do_out_asm(_rec_outw, "sthbrx") -__do_out_asm(_rec_outl, "stwbrx") - -#endif /* CONFIG_PPC32 */ - -/* The "__do_*" operations below provide the actual "base" implementation - * for each of the defined acccessor. Some of them use the out_* functions - * directly, some of them still use EEH, though we might change that in the - * future. Those macros below provide the necessary argument swapping and - * handling of the IO base for PIO. - * - * They are themselves used by the macros that define the actual accessors - * and can be used by the hooks if any. - * - * Note that PIO operations are always defined in terms of their corresonding - * MMIO operations. That allows platforms like iSeries who want to modify the - * behaviour of both to only hook on the MMIO version and get both. It's also - * possible to hook directly at the toplevel PIO operation if they have to - * be handled differently - */ -#define __do_writeb(val, addr) out_8(PCI_FIX_ADDR(addr), val) -#define __do_writew(val, addr) out_le16(PCI_FIX_ADDR(addr), val) -#define __do_writel(val, addr) out_le32(PCI_FIX_ADDR(addr), val) -#define __do_writeq(val, addr) out_le64(PCI_FIX_ADDR(addr), val) -#define __do_writew_be(val, addr) out_be16(PCI_FIX_ADDR(addr), val) -#define __do_writel_be(val, addr) out_be32(PCI_FIX_ADDR(addr), val) -#define __do_writeq_be(val, addr) out_be64(PCI_FIX_ADDR(addr), val) - -#ifdef CONFIG_EEH -#define __do_readb(addr) eeh_readb(PCI_FIX_ADDR(addr)) -#define __do_readw(addr) eeh_readw(PCI_FIX_ADDR(addr)) -#define __do_readl(addr) eeh_readl(PCI_FIX_ADDR(addr)) -#define __do_readq(addr) eeh_readq(PCI_FIX_ADDR(addr)) -#define __do_readw_be(addr) eeh_readw_be(PCI_FIX_ADDR(addr)) -#define __do_readl_be(addr) eeh_readl_be(PCI_FIX_ADDR(addr)) -#define __do_readq_be(addr) eeh_readq_be(PCI_FIX_ADDR(addr)) -#else /* CONFIG_EEH */ -#define __do_readb(addr) in_8(PCI_FIX_ADDR(addr)) -#define __do_readw(addr) in_le16(PCI_FIX_ADDR(addr)) -#define __do_readl(addr) in_le32(PCI_FIX_ADDR(addr)) -#define __do_readq(addr) in_le64(PCI_FIX_ADDR(addr)) -#define __do_readw_be(addr) in_be16(PCI_FIX_ADDR(addr)) -#define __do_readl_be(addr) in_be32(PCI_FIX_ADDR(addr)) -#define __do_readq_be(addr) in_be64(PCI_FIX_ADDR(addr)) -#endif /* !defined(CONFIG_EEH) */ - -#ifdef CONFIG_PPC32 -#define __do_outb(val, port) _rec_outb(val, port) -#define __do_outw(val, port) _rec_outw(val, port) -#define __do_outl(val, port) _rec_outl(val, port) -#define __do_inb(port) _rec_inb(port) -#define __do_inw(port) _rec_inw(port) -#define __do_inl(port) _rec_inl(port) -#else /* CONFIG_PPC32 */ -#define __do_outb(val, port) writeb(val,(PCI_IO_ADDR)_IO_BASE+port); -#define __do_outw(val, port) writew(val,(PCI_IO_ADDR)_IO_BASE+port); -#define __do_outl(val, port) writel(val,(PCI_IO_ADDR)_IO_BASE+port); -#define __do_inb(port) readb((PCI_IO_ADDR)_IO_BASE + port); -#define __do_inw(port) readw((PCI_IO_ADDR)_IO_BASE + port); -#define __do_inl(port) readl((PCI_IO_ADDR)_IO_BASE + port); -#endif /* !CONFIG_PPC32 */ - -#ifdef CONFIG_EEH -#define __do_readsb(a, b, n) eeh_readsb(PCI_FIX_ADDR(a), (b), (n)) -#define __do_readsw(a, b, n) eeh_readsw(PCI_FIX_ADDR(a), (b), (n)) -#define __do_readsl(a, b, n) eeh_readsl(PCI_FIX_ADDR(a), (b), (n)) -#else /* CONFIG_EEH */ -#define __do_readsb(a, b, n) _insb(PCI_FIX_ADDR(a), (b), (n)) -#define __do_readsw(a, b, n) _insw(PCI_FIX_ADDR(a), (b), (n)) -#define __do_readsl(a, b, n) _insl(PCI_FIX_ADDR(a), (b), (n)) -#endif /* !CONFIG_EEH */ -#define __do_writesb(a, b, n) _outsb(PCI_FIX_ADDR(a),(b),(n)) -#define __do_writesw(a, b, n) _outsw(PCI_FIX_ADDR(a),(b),(n)) -#define __do_writesl(a, b, n) _outsl(PCI_FIX_ADDR(a),(b),(n)) - -#define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) -#define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) -#define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) -#define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) -#define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) -#define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) - -#define __do_memset_io(addr, c, n) \ - _memset_io(PCI_FIX_ADDR(addr), c, n) -#define __do_memcpy_toio(dst, src, n) \ - _memcpy_toio(PCI_FIX_ADDR(dst), src, n) - -#ifdef CONFIG_EEH -#define __do_memcpy_fromio(dst, src, n) \ - eeh_memcpy_fromio(dst, PCI_FIX_ADDR(src), n) -#else /* CONFIG_EEH */ -#define __do_memcpy_fromio(dst, src, n) \ - _memcpy_fromio(dst,PCI_FIX_ADDR(src),n) -#endif /* !CONFIG_EEH */ - -#ifdef CONFIG_PPC_INDIRECT_IO -#define DEF_PCI_HOOK(x) x -#else -#define DEF_PCI_HOOK(x) NULL -#endif - -/* Structure containing all the hooks */ -extern struct ppc_pci_io { - -#define DEF_PCI_AC_RET(name, ret, at, al, space, aa) ret (*name) at; -#define DEF_PCI_AC_NORET(name, at, al, space, aa) void (*name) at; - -#include <asm/io-defs.h> - -#undef DEF_PCI_AC_RET -#undef DEF_PCI_AC_NORET - -} ppc_pci_io; - -/* The inline wrappers */ -#define DEF_PCI_AC_RET(name, ret, at, al, space, aa) \ -static inline ret name at \ -{ \ - if (DEF_PCI_HOOK(ppc_pci_io.name) != NULL) \ - return ppc_pci_io.name al; \ - return __do_##name al; \ -} - -#define DEF_PCI_AC_NORET(name, at, al, space, aa) \ -static inline void name at \ -{ \ - if (DEF_PCI_HOOK(ppc_pci_io.name) != NULL) \ - ppc_pci_io.name al; \ - else \ - __do_##name al; \ -} - -#include <asm/io-defs.h> - -#undef DEF_PCI_AC_RET -#undef DEF_PCI_AC_NORET - -/* Some drivers check for the presence of readq & writeq with - * a #ifdef, so we make them happy here. - */ -#ifdef __powerpc64__ -#define readq readq -#define writeq writeq -#endif - -/* - * Convert a physical pointer to a virtual kernel pointer for /dev/mem - * access - */ -#define xlate_dev_mem_ptr(p) __va(p) - -/* - * Convert a virtual cached pointer to an uncached pointer - */ -#define xlate_dev_kmem_ptr(p) p - -/* - * We don't do relaxed operations yet, at least not with this semantic - */ -#define readb_relaxed(addr) readb(addr) -#define readw_relaxed(addr) readw(addr) -#define readl_relaxed(addr) readl(addr) -#define readq_relaxed(addr) readq(addr) - -#ifdef CONFIG_PPC32 -#define mmiowb() -#else -/* - * Enforce synchronisation of stores vs. spin_unlock - * (this does it explicitly, though our implementation of spin_unlock - * does it implicitely too) - */ -static inline void mmiowb(void) -{ - unsigned long tmp; - - __asm__ __volatile__("sync; li %0,0; stb %0,%1(13)" - : "=&r" (tmp) : "i" (offsetof(struct paca_struct, io_sync)) - : "memory"); -} -#endif /* !CONFIG_PPC32 */ - -static inline void iosync(void) -{ - __asm__ __volatile__ ("sync" : : : "memory"); -} - -/* Enforce in-order execution of data I/O. - * No distinction between read/write on PPC; use eieio for all three. - * Those are fairly week though. They don't provide a barrier between - * MMIO and cacheable storage nor do they provide a barrier vs. locks, - * they only provide barriers between 2 __raw MMIO operations and - * possibly break write combining. - */ -#define iobarrier_rw() eieio() -#define iobarrier_r() eieio() -#define iobarrier_w() eieio() - - -/* - * output pause versions need a delay at least for the - * w83c105 ide controller in a p610. - */ -#define inb_p(port) inb(port) -#define outb_p(val, port) (udelay(1), outb((val), (port))) -#define inw_p(port) inw(port) -#define outw_p(val, port) (udelay(1), outw((val), (port))) -#define inl_p(port) inl(port) -#define outl_p(val, port) (udelay(1), outl((val), (port))) - - -#define IO_SPACE_LIMIT ~(0UL) - - -/** - * ioremap - map bus memory into CPU space - * @address: bus address of the memory - * @size: size of the resource to map - * - * ioremap performs a platform specific sequence of operations to - * make bus memory CPU accessible via the readb/readw/readl/writeb/ - * writew/writel functions and the other mmio helpers. The returned - * address is not guaranteed to be usable directly as a virtual - * address. - * - * We provide a few variations of it: - * - * * ioremap is the standard one and provides non-cacheable guarded mappings - * and can be hooked by the platform via ppc_md - * - * * ioremap_flags allows to specify the page flags as an argument and can - * also be hooked by the platform via ppc_md. ioremap_prot is the exact - * same thing as ioremap_flags. - * - * * ioremap_nocache is identical to ioremap - * - * * iounmap undoes such a mapping and can be hooked - * - * * __ioremap_at (and the pending __iounmap_at) are low level functions to - * create hand-made mappings for use only by the PCI code and cannot - * currently be hooked. Must be page aligned. - * - * * __ioremap is the low level implementation used by ioremap and - * ioremap_flags and cannot be hooked (but can be used by a hook on one - * of the previous ones) - * - * * __iounmap, is the low level implementation used by iounmap and cannot - * be hooked (but can be used by a hook on iounmap) - * - */ -extern void __iomem *ioremap(phys_addr_t address, unsigned long size); -extern void __iomem *ioremap_flags(phys_addr_t address, unsigned long size, - unsigned long flags); -#define ioremap_nocache(addr, size) ioremap((addr), (size)) -#define ioremap_prot(addr, size, prot) ioremap_flags((addr), (size), (prot)) - -extern void iounmap(volatile void __iomem *addr); - -extern void __iomem *__ioremap(phys_addr_t, unsigned long size, - unsigned long flags); -extern void __iounmap(volatile void __iomem *addr); - -extern void __iomem * __ioremap_at(phys_addr_t pa, void *ea, - unsigned long size, unsigned long flags); -extern void __iounmap_at(void *ea, unsigned long size); - -/* - * When CONFIG_PPC_INDIRECT_IO is set, we use the generic iomap implementation - * which needs some additional definitions here. They basically allow PIO - * space overall to be 1GB. This will work as long as we never try to use - * iomap to map MMIO below 1GB which should be fine on ppc64 - */ -#define HAVE_ARCH_PIO_SIZE 1 -#define PIO_OFFSET 0x00000000UL -#define PIO_MASK (FULL_IO_SIZE - 1) -#define PIO_RESERVED (FULL_IO_SIZE) - -#define mmio_read16be(addr) readw_be(addr) -#define mmio_read32be(addr) readl_be(addr) -#define mmio_write16be(val, addr) writew_be(val, addr) -#define mmio_write32be(val, addr) writel_be(val, addr) -#define mmio_insb(addr, dst, count) readsb(addr, dst, count) -#define mmio_insw(addr, dst, count) readsw(addr, dst, count) -#define mmio_insl(addr, dst, count) readsl(addr, dst, count) -#define mmio_outsb(addr, src, count) writesb(addr, src, count) -#define mmio_outsw(addr, src, count) writesw(addr, src, count) -#define mmio_outsl(addr, src, count) writesl(addr, src, count) - -/** - * virt_to_phys - map virtual addresses to physical - * @address: address to remap - * - * The returned physical address is the physical (CPU) mapping for - * the memory address given. It is only valid to use this function on - * addresses directly mapped or allocated via kmalloc. - * - * This function does not give bus mappings for DMA transfers. In - * almost all conceivable cases a device driver should not be using - * this function - */ -static inline unsigned long virt_to_phys(volatile void * address) -{ - return __pa((unsigned long)address); -} - -/** - * phys_to_virt - map physical address to virtual - * @address: address to remap - * - * The returned virtual address is a current CPU mapping for - * the memory address given. It is only valid to use this function on - * addresses that have a kernel mapping - * - * This function does not handle bus mappings for DMA transfers. In - * almost all conceivable cases a device driver should not be using - * this function - */ -static inline void * phys_to_virt(unsigned long address) -{ - return (void *)__va(address); -} - -/* - * Change "struct page" to physical address. - */ -#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) - -/* We do NOT want virtual merging, it would put too much pressure on - * our iommu allocator. Instead, we want drivers to be smart enough - * to coalesce sglists that happen to have been mapped in a contiguous - * way by the iommu - */ -#define BIO_VMERGE_BOUNDARY 0 - -/* - * 32 bits still uses virt_to_bus() for it's implementation of DMA - * mappings se we have to keep it defined here. We also have some old - * drivers (shame shame shame) that use bus_to_virt() and haven't been - * fixed yet so I need to define it here. - */ -#ifdef CONFIG_PPC32 - -static inline unsigned long virt_to_bus(volatile void * address) -{ - if (address == NULL) - return 0; - return __pa(address) + PCI_DRAM_OFFSET; -} - -static inline void * bus_to_virt(unsigned long address) -{ - if (address == 0) - return NULL; - return __va(address - PCI_DRAM_OFFSET); -} - -#define page_to_bus(page) (page_to_phys(page) + PCI_DRAM_OFFSET) - -#endif /* CONFIG_PPC32 */ - -/* access ports */ -#define setbits32(_addr, _v) out_be32((_addr), in_be32(_addr) | (_v)) -#define clrbits32(_addr, _v) out_be32((_addr), in_be32(_addr) & ~(_v)) - -#define setbits16(_addr, _v) out_be16((_addr), in_be16(_addr) | (_v)) -#define clrbits16(_addr, _v) out_be16((_addr), in_be16(_addr) & ~(_v)) - -#define setbits8(_addr, _v) out_8((_addr), in_8(_addr) | (_v)) -#define clrbits8(_addr, _v) out_8((_addr), in_8(_addr) & ~(_v)) - -/* Clear and set bits in one shot. These macros can be used to clear and - * set multiple bits in a register using a single read-modify-write. These - * macros can also be used to set a multiple-bit bit pattern using a mask, - * by specifying the mask in the 'clear' parameter and the new bit pattern - * in the 'set' parameter. - */ - -#define clrsetbits(type, addr, clear, set) \ - out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) - -#ifdef __powerpc64__ -#define clrsetbits_be64(addr, clear, set) clrsetbits(be64, addr, clear, set) -#define clrsetbits_le64(addr, clear, set) clrsetbits(le64, addr, clear, set) -#endif - -#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set) -#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set) - -#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set) -#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set) - -#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set) - -void __iomem *devm_ioremap_prot(struct device *dev, resource_size_t offset, - size_t size, unsigned long flags); - -#endif /* __KERNEL__ */ - -#endif /* _ASM_POWERPC_IO_H */ |