LXR uboot/arch/nds32/include/asm/io.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 *  linux/include/asm-nds/io.h
   4 *
   5 * Copyright (C) 1996-2000 Russell King
   6 *
   7 * Copyright (C) 2011 Andes Technology Corporation
   8 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
   9 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
  10 *
  11 * Modifications:
  12 *  16-Sep-1996 RMK     Inlined the inx/outx functions & optimised for both
  13 *                      constant addresses and variable addresses.
  14 *  04-Dec-1997 RMK     Moved a lot of this stuff to the new architecture
  15 *                      specific IO header files.
  16 *  27-Mar-1999 PJB     Second parameter of memcpy_toio is const..
  17 *  04-Apr-1999 PJB     Added check_signature.
  18 *  12-Dec-1999 RMK     More cleanups
  19 *  18-Jun-2000 RMK     Removed virt_to_* and friends definitions
  20 */
  21#ifndef __ASM_NDS_IO_H
  22#define __ASM_NDS_IO_H
  23
  24/*
  25 * CAUTION:
  26 *   - do not implement for NDS32 Arch yet.
  27 *   - cmd_pci.c, cmd_scsi.c, Lynxkdi.c, usb.c, usb_storage.c, etc...
  28 *     iinclude asm/io.h
  29 */
  30
  31#ifdef __KERNEL__
  32
  33#include <linux/types.h>
  34#include <asm/byteorder.h>
  35
  36static inline void sync(void)
  37{
  38}
  39
  40#ifdef CONFIG_ARCH_MAP_SYSMEM
  41static inline void *map_sysmem(phys_addr_t paddr, unsigned long len)
  42{
  43        if(paddr <PHYS_SDRAM_0_SIZE + PHYS_SDRAM_1_SIZE)
  44        paddr = paddr | 0x40000000;
  45        return (void *)(uintptr_t)paddr;
  46}
  47
  48static inline void *unmap_sysmem(const void *vaddr)
  49{
  50        phys_addr_t paddr = (phys_addr_t)vaddr;
  51        paddr = paddr & ~0x40000000;
  52        return (void *)(uintptr_t)paddr;
  53}
  54
  55static inline phys_addr_t map_to_sysmem(const void *ptr)
  56{
  57        return (phys_addr_t)(uintptr_t)ptr;
  58}
  59#endif
  60
  61/*
  62 * Generic virtual read/write.  Note that we don't support half-word
  63 * read/writes.  We define __arch_*[bl] here, and leave __arch_*w
  64 * to the architecture specific code.
  65 */
  66#define __arch_getb(a)                  (*(unsigned char *)(a))
  67#define __arch_getw(a)                  (*(unsigned short *)(a))
  68#define __arch_getl(a)                  (*(unsigned int *)(a))
  69
  70#define __arch_putb(v, a)               (*(unsigned char *)(a) = (v))
  71#define __arch_putw(v, a)               (*(unsigned short *)(a) = (v))
  72#define __arch_putl(v, a)               (*(unsigned int *)(a) = (v))
  73
  74extern void __raw_writesb(unsigned int addr, const void *data, int bytelen);
  75extern void __raw_writesw(unsigned int addr, const void *data, int wordlen);
  76extern void __raw_writesl(unsigned int addr, const void *data, int longlen);
  77
  78extern void __raw_readsb(unsigned int addr, void *data, int bytelen);
  79extern void __raw_readsw(unsigned int addr, void *data, int wordlen);
  80extern void __raw_readsl(unsigned int addr, void *data, int longlen);
  81
  82#define __raw_writeb(v, a)              __arch_putb(v, a)
  83#define __raw_writew(v, a)              __arch_putw(v, a)
  84#define __raw_writel(v, a)              __arch_putl(v, a)
  85
  86#define __raw_readb(a)                  __arch_getb(a)
  87#define __raw_readw(a)                  __arch_getw(a)
  88#define __raw_readl(a)                  __arch_getl(a)
  89
  90/*
  91 * TODO: The kernel offers some more advanced versions of barriers, it might
  92 * have some advantages to use them instead of the simple one here.
  93 */
  94#define dmb()           __asm__ __volatile__ ("" : : : "memory")
  95#define __iormb()       dmb()
  96#define __iowmb()       dmb()
  97
  98static inline void writeb(u8 val, volatile void __iomem *addr)
  99{
 100        __iowmb();
 101        __arch_putb(val, addr);
 102}
 103
 104static inline void writew(u16 val, volatile void __iomem *addr)
 105{
 106        __iowmb();
 107        __arch_putw(val, addr);
 108
 109}
 110
 111static inline void writel(u32 val, volatile void __iomem *addr)
 112{
 113        __iowmb();
 114        __arch_putl(val, addr);
 115}
 116
 117static inline u8 readb(const volatile void __iomem *addr)
 118{
 119        u8      val;
 120
 121        val = __arch_getb(addr);
 122        __iormb();
 123        return val;
 124}
 125
 126static inline u16 readw(const volatile void __iomem *addr)
 127{
 128        u16     val;
 129
 130        val = __arch_getw(addr);
 131        __iormb();
 132        return val;
 133}
 134
 135static inline u32 readl(const volatile void __iomem *addr)
 136{
 137        u32     val;
 138
 139        val = __arch_getl(addr);
 140        __iormb();
 141        return val;
 142}
 143
 144/*
 145 * The compiler seems to be incapable of optimising constants
 146 * properly.  Spell it out to the compiler in some cases.
 147 * These are only valid for small values of "off" (< 1<<12)
 148 */
 149#define __raw_base_writeb(val, base, off)       __arch_base_putb(val, base, off)
 150#define __raw_base_writew(val, base, off)       __arch_base_putw(val, base, off)
 151#define __raw_base_writel(val, base, off)       __arch_base_putl(val, base, off)
 152
 153#define __raw_base_readb(base, off)     __arch_base_getb(base, off)
 154#define __raw_base_readw(base, off)     __arch_base_getw(base, off)
 155#define __raw_base_readl(base, off)     __arch_base_getl(base, off)
 156
 157#define out_arch(type, endian, a, v)    __raw_write##type(cpu_to_##endian(v), a)
 158#define in_arch(type, endian, a)        endian##_to_cpu(__raw_read##type(a))
 159
 160#define out_le32(a, v)                  out_arch(l, le32, a, v)
 161#define out_le16(a, v)                  out_arch(w, le16, a, v)
 162
 163#define in_le32(a)                      in_arch(l, le32, a)
 164#define in_le16(a)                      in_arch(w, le16, a)
 165
 166#define out_be32(a, v)                  out_arch(l, be32, a, v)
 167#define out_be16(a, v)                  out_arch(w, be16, a, v)
 168
 169#define in_be32(a)                      in_arch(l, be32, a)
 170#define in_be16(a)                      in_arch(w, be16, a)
 171
 172#define out_8(a, v)                     __raw_writeb(v, a)
 173#define in_8(a)                         __raw_readb(a)
 174
 175/*
 176 * Clear and set bits in one shot. These macros can be used to clear and
 177 * set multiple bits in a register using a single call. These macros can
 178 * also be used to set a multiple-bit bit pattern using a mask, by
 179 * specifying the mask in the 'clear' parameter and the new bit pattern
 180 * in the 'set' parameter.
 181 */
 182
 183#define clrbits(type, addr, clear) \
 184        out_##type((addr), in_##type(addr) & ~(clear))
 185
 186#define setbits(type, addr, set) \
 187        out_##type((addr), in_##type(addr) | (set))
 188
 189#define clrsetbits(type, addr, clear, set) \
 190        out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
 191
 192#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
 193#define setbits_be32(addr, set) setbits(be32, addr, set)
 194#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
 195
 196#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
 197#define setbits_le32(addr, set) setbits(le32, addr, set)
 198#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
 199
 200#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
 201#define setbits_be16(addr, set) setbits(be16, addr, set)
 202#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
 203
 204#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
 205#define setbits_le16(addr, set) setbits(le16, addr, set)
 206#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
 207
 208#define clrbits_8(addr, clear) clrbits(8, addr, clear)
 209#define setbits_8(addr, set) setbits(8, addr, set)
 210#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
 211
 212/*
 213 * Now, pick up the machine-defined IO definitions
 214 * #include <asm/arch/io.h>
 215 */
 216
 217/*
 218 *  IO port access primitives
 219 *  -------------------------
 220 *
 221 * The NDS32 doesn't have special IO access instructions just like ARM;
 222 * all IO is memory mapped.
 223 * Note that these are defined to perform little endian accesses
 224 * only.  Their primary purpose is to access PCI and ISA peripherals.
 225 *
 226 * Note that for a big endian machine, this implies that the following
 227 * big endian mode connectivity is in place, as described by numerious
 228 * ARM documents:
 229 *
 230 *    PCI:  D0-D7   D8-D15 D16-D23 D24-D31
 231 *    ARM: D24-D31 D16-D23  D8-D15  D0-D7
 232 *
 233 * The machine specific io.h include defines __io to translate an "IO"
 234 * address to a memory address.
 235 *
 236 * Note that we prevent GCC re-ordering or caching values in expressions
 237 * by introducing sequence points into the in*() definitions.  Note that
 238 * __raw_* do not guarantee this behaviour.
 239 *
 240 * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.
 241 */
 242#ifdef __io
 243#define outb(v, p)                      __raw_writeb(v, __io(p))
 244#define outw(v, p)                      __raw_writew(cpu_to_le16(v), __io(p))
 245#define outl(v, p)                      __raw_writel(cpu_to_le32(v), __io(p))
 246
 247#define inb(p)  ({ unsigned int __v = __raw_readb(__io(p)); __v; })
 248#define inw(p)  ({ unsigned int __v = le16_to_cpu(__raw_readw(__io(p))); __v; })
 249#define inl(p)  ({ unsigned int __v = le32_to_cpu(__raw_readl(__io(p))); __v; })
 250
 251#define outsb(p, d, l)                  writesb(__io(p), d, l)
 252#define outsw(p, d, l)                  writesw(__io(p), d, l)
 253#define outsl(p, d, l)                  writesl(__io(p), d, l)
 254
 255#define insb(p, d, l)                   readsb(__io(p), d, l)
 256#define insw(p, d, l)                   readsw(__io(p), d, l)
 257#define insl(p, d, l)                   readsl(__io(p), d, l)
 258
 259static inline void readsb(unsigned int *addr, void * data, int bytelen)
 260{
 261        unsigned char *ptr = (unsigned char *)addr;
 262        unsigned char *ptr2 = (unsigned char *)data;
 263        while (bytelen) {
 264                *ptr2 = *ptr;
 265                ptr2++;
 266                bytelen--;
 267        }
 268}
 269
 270static inline void readsw(unsigned int *addr, void * data, int wordlen)
 271{
 272        unsigned short *ptr = (unsigned short *)addr;
 273        unsigned short *ptr2 = (unsigned short *)data;
 274        while (wordlen) {
 275                *ptr2 = *ptr;
 276                ptr2++;
 277                wordlen--;
 278        }
 279}
 280
 281static inline void readsl(unsigned int *addr, void * data, int longlen)
 282{
 283        unsigned int *ptr = (unsigned int *)addr;
 284        unsigned int *ptr2 = (unsigned int *)data;
 285        while (longlen) {
 286                *ptr2 = *ptr;
 287                ptr2++;
 288                longlen--;
 289        }
 290}
 291static inline void writesb(unsigned int *addr, const void * data, int bytelen)
 292{
 293        unsigned char *ptr = (unsigned char *)addr;
 294        unsigned char *ptr2 = (unsigned char *)data;
 295        while (bytelen) {
 296                *ptr = *ptr2;
 297                ptr2++;
 298                bytelen--;
 299        }
 300}
 301static inline void writesw(unsigned int *addr, const void * data, int wordlen)
 302{
 303        unsigned short *ptr = (unsigned short *)addr;
 304        unsigned short *ptr2 = (unsigned short *)data;
 305        while (wordlen) {
 306                *ptr = *ptr2;
 307                ptr2++;
 308                wordlen--;
 309        }
 310}
 311static inline void writesl(unsigned int *addr, const void * data, int longlen)
 312{
 313        unsigned int *ptr = (unsigned int *)addr;
 314        unsigned int *ptr2 = (unsigned int *)data;
 315        while (longlen) {
 316                *ptr = *ptr2;
 317                ptr2++;
 318                longlen--;
 319        }
 320}
 321#endif
 322
 323#define outb_p(val, port)               outb((val), (port))
 324#define outw_p(val, port)               outw((val), (port))
 325#define outl_p(val, port)               outl((val), (port))
 326#define inb_p(port)                     inb((port))
 327#define inw_p(port)                     inw((port))
 328#define inl_p(port)                     inl((port))
 329
 330#define outsb_p(port, from, len)        outsb(port, from, len)
 331#define outsw_p(port, from, len)        outsw(port, from, len)
 332#define outsl_p(port, from, len)        outsl(port, from, len)
 333#define insb_p(port, to, len)           insb(port, to, len)
 334#define insw_p(port, to, len)           insw(port, to, len)
 335#define insl_p(port, to, len)           insl(port, to, len)
 336
 337/*
 338 * DMA-consistent mapping functions.  These allocate/free a region of
 339 * uncached, unwrite-buffered mapped memory space for use with DMA
 340 * devices.  This is the "generic" version.  The PCI specific version
 341 * is in pci.h
 342 */
 343extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle);
 344extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle);
 345extern void consistent_sync(void *vaddr, size_t size, int rw);
 346
 347/*
 348 * String version of IO memory access ops:
 349 */
 350extern void _memcpy_fromio(void *, unsigned long, size_t);
 351extern void _memcpy_toio(unsigned long, const void *, size_t);
 352extern void _memset_io(unsigned long, int, size_t);
 353
 354extern void __readwrite_bug(const char *fn);
 355
 356/*
 357 * If this architecture has PCI memory IO, then define the read/write
 358 * macros.  These should only be used with the cookie passed from
 359 * ioremap.
 360 */
 361#ifdef __mem_pci
 362
 363#define readb(c) ({ unsigned int __v = \
 364                        __raw_readb(__mem_pci(c)); __v; })
 365#define readw(c) ({ unsigned int __v = \
 366                        le16_to_cpu(__raw_readw(__mem_pci(c))); __v; })
 367#define readl(c) ({ unsigned int __v = \
 368                        le32_to_cpu(__raw_readl(__mem_pci(c))); __v; })
 369
 370#define writeb(v, c)            __raw_writeb(v, __mem_pci(c))
 371#define writew(v, c)            __raw_writew(cpu_to_le16(v), __mem_pci(c))
 372#define writel(v, c)            __raw_writel(cpu_to_le32(v), __mem_pci(c))
 373
 374#define memset_io(c, v, l)      _memset_io(__mem_pci(c), (v), (l))
 375#define memcpy_fromio(a, c, l)  _memcpy_fromio((a), __mem_pci(c), (l))
 376#define memcpy_toio(c, a, l)    _memcpy_toio(__mem_pci(c), (a), (l))
 377
 378#define eth_io_copy_and_sum(s, c, l, b) \
 379        eth_copy_and_sum((s), __mem_pci(c), (l), (b))
 380
 381static inline int
 382check_signature(unsigned long io_addr, const unsigned char *signature,
 383                int length)
 384{
 385        int retval = 0;
 386        do {
 387                if (readb(io_addr) != *signature)
 388                        goto out;
 389                io_addr++;
 390                signature++;
 391                length--;
 392        } while (length);
 393        retval = 1;
 394out:
 395        return retval;
 396}
 397#endif  /* __mem_pci */
 398
 399/*
 400 * If this architecture has ISA IO, then define the isa_read/isa_write
 401 * macros.
 402 */
 403#ifdef __mem_isa
 404
 405#define isa_readb(addr)                 __raw_readb(__mem_isa(addr))
 406#define isa_readw(addr)                 __raw_readw(__mem_isa(addr))
 407#define isa_readl(addr)                 __raw_readl(__mem_isa(addr))
 408#define isa_writeb(val, addr)           __raw_writeb(val, __mem_isa(addr))
 409#define isa_writew(val, addr)           __raw_writew(val, __mem_isa(addr))
 410#define isa_writel(val, addr)           __raw_writel(val, __mem_isa(addr))
 411#define isa_memset_io(a, b, c)          _memset_io(__mem_isa(a), (b), (c))
 412#define isa_memcpy_fromio(a, b, c)      _memcpy_fromio((a), __mem_isa(b), (c))
 413#define isa_memcpy_toio(a, b, c)        _memcpy_toio(__mem_isa((a)), (b), (c))
 414
 415#define isa_eth_io_copy_and_sum(a, b, c, d) \
 416        eth_copy_and_sum((a), __mem_isa(b), (c), (d))
 417
 418static inline int
 419isa_check_signature(unsigned long io_addr, const unsigned char *signature,
 420                        int length)
 421{
 422        int retval = 0;
 423        do {
 424                if (isa_readb(io_addr) != *signature)
 425                        goto out;
 426                io_addr++;
 427                signature++;
 428                length--;
 429        } while (length);
 430        retval = 1;
 431out:
 432        return retval;
 433}
 434
 435#else   /* __mem_isa */
 436
 437#define isa_readb(addr)                 (__readwrite_bug("isa_readb"), 0)
 438#define isa_readw(addr)                 (__readwrite_bug("isa_readw"), 0)
 439#define isa_readl(addr)                 (__readwrite_bug("isa_readl"), 0)
 440#define isa_writeb(val, addr)           __readwrite_bug("isa_writeb")
 441#define isa_writew(val, addr)           __readwrite_bug("isa_writew")
 442#define isa_writel(val, addr)           __readwrite_bug("isa_writel")
 443#define isa_memset_io(a, b, c)          __readwrite_bug("isa_memset_io")
 444#define isa_memcpy_fromio(a, b, c)      __readwrite_bug("isa_memcpy_fromio")
 445#define isa_memcpy_toio(a, b, c)        __readwrite_bug("isa_memcpy_toio")
 446
 447#define isa_eth_io_copy_and_sum(a, b, c, d) \
 448        __readwrite_bug("isa_eth_io_copy_and_sum")
 449
 450#define isa_check_signature(io, sig, len)       (0)
 451
 452#endif  /* __mem_isa */
 453
 454#include <asm-generic/io.h>
 455
 456#endif  /* __KERNEL__ */
 457#endif  /* __ASM_NDS_IO_H */
 458