kernel/include/arch-x86/addrs.h

   1 #ifndef _ARCH_ADDRS_H
   2 #define _ARCH_ADDRS_H
   3
   4 #define PHYSMEM_START 0x80000000
   5 #define KERNEL_START PHYSMEM_START
   6
   7 #ifdef __cplusplus
   8 #include <kern/types.h>
   9
  10 namespace Arch {
  11         static inline ulong kvirt_to_phys(void *addr)
  12         {
  13                 return reinterpret_cast<ulong>(addr) - PHYSMEM_START;
  14         }
  15
  16         static inline void *phys_to_kvirt(ulong addr)
  17         {
  18                 return reinterpret_cast<void *>(addr + PHYSMEM_START);
  19         }
  20
  21         namespace Priv {
  22                 static const ulong max_ktext_map = 4 * 1024 * 1024;
  23         }
  24
  25         // Allow some room for these regions to grow if needed
  26         // (8 pages each should be more than sufficient).
  27         static const ulong roshared_map = 0x7fff0000;
  28         static const ulong rwshared_map = 0x7fff8000;
  29
  30         static const ulong stack_bottom = 0x7f000000;
  31         static const ulong stack_top = 0x7ffeffff;
  32         static const bool stack_grows_up = false;
  33 };
  34
  35 #endif
  36 #endif