arch/unicore32/include/asm/hwdef-copro.h

   1 /*
   2  * Co-processor register definitions for PKUnity SoC and UniCore ISA
   3  *
   4  * Copyright (C) 2001-2012 GUAN Xue-tao
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #ifndef __UNICORE_HWDEF_COPRO_H__
  11 #define __UNICORE_HWDEF_COPRO_H__
  12
  13 /*
  14  * Control Register bits (CP#0 CR1)
  15  */
  16 #define CR_M    (1 << 0)        /* MMU enable                           */
  17 #define CR_A    (1 << 1)        /* Alignment abort enable               */
  18 #define CR_D    (1 << 2)        /* Dcache enable                        */
  19 #define CR_I    (1 << 3)        /* Icache enable                        */
  20 #define CR_B    (1 << 4)        /* Dcache write mechanism: write back   */
  21 #define CR_T    (1 << 5)        /* Burst enable                         */
  22 #define CR_V    (1 << 13)       /* Vectors relocated to 0xffff0000      */
  23
  24 #ifndef __ASSEMBLY__
  25
  26 #define vectors_high()          (cr_alignment & CR_V)
  27
  28 extern unsigned long cr_no_alignment;   /* defined in entry.S */
  29 extern unsigned long cr_alignment;      /* defined in entry.S */
  30
  31 static inline unsigned int get_cr(void)
  32 {
  33         unsigned int val;
  34         asm("movc %0, p0.c1, #0" : "=r" (val) : : "cc");
  35         return val;
  36 }
  37
  38 static inline void set_cr(unsigned int val)
  39 {
  40         asm volatile("movc p0.c1, %0, #0" : : "r" (val) : "cc");
  41         isb();
  42 }
  43
  44 extern void adjust_cr(unsigned long mask, unsigned long set);
  45
  46 #endif /* __ASSEMBLY__ */
  47
  48 #endif /* __UNICORE_HWDEF_COPRO_H__ */