target/linux/rtl838x/files-5.4/arch/mips/include/asm/mach-rtl838x/ioremap.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 #ifndef RTL838X_IOREMAP_H_
   3 #define RTL838X_IOREMAP_H_
   4
   5 static inline phys_addr_t fixup_bigphys_addr(phys_addr_t phys_addr, phys_addr_t size)
   6 {
   7         return phys_addr;
   8 }
   9
  10 static inline int is_rtl838x_internal_registers(phys_addr_t offset)
  11 {
  12         /* IO-Block */
  13         if (offset >= 0xb8000000 && offset < 0xb9000000)
  14                 return 1;
  15         /* Switch block */
  16         if (offset >= 0xbb000000 && offset < 0xbc000000)
  17                 return 1;
  18         return 0;
  19 }
  20
  21 static inline void __iomem *plat_ioremap(phys_addr_t offset, unsigned long size,
  22                                          unsigned long flags)
  23 {
  24         if (is_rtl838x_internal_registers(offset))
  25                 return (void __iomem *)offset;
  26         return NULL;
  27 }
  28
  29 static inline int plat_iounmap(const volatile void __iomem *addr)
  30 {
  31         return is_rtl838x_internal_registers((unsigned long)addr);
  32 }
  33
  34 #endif