target/linux/realtek/files-5.10/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 int is_rtl838x_internal_registers(phys_addr_t offset)
   6 {
   7         /* IO-Block */
   8         if (offset >= 0xb8000000 && offset < 0xb9000000)
   9                 return 1;
  10         /* Switch block */
  11         if (offset >= 0xbb000000 && offset < 0xbc000000)
  12                 return 1;
  13         return 0;
  14 }
  15
  16 static inline void __iomem *plat_ioremap(phys_addr_t offset, unsigned long size,
  17                                          unsigned long flags)
  18 {
  19         if (is_rtl838x_internal_registers(offset))
  20                 return (void __iomem *)offset;
  21         return NULL;
  22 }
  23
  24 static inline int plat_iounmap(const volatile void __iomem *addr)
  25 {
  26         return is_rtl838x_internal_registers((unsigned long)addr);
  27 }
  28
  29 #endif