arch/sparc/include/asm/processor.h

   1 /* SPARC Processor specifics
   2  * taken from the SPARC port of Linux (ptrace.h).
   3  *
   4  * (C) Copyright 2007
   5  * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  *
  22  */
  23
  24 #ifndef __ASM_SPARC_PROCESSOR_H
  25 #define __ASM_SPARC_PROCESSOR_H
  26
  27 #include <asm/arch/asi.h>
  28
  29 #ifdef CONFIG_LEON
  30
  31 /* All LEON processors supported */
  32 #include <asm/leon.h>
  33
  34 #else
  35 /* other processors */
  36 #error Unknown SPARC Processor
  37 #endif
  38
  39 #ifndef __ASSEMBLY__
  40
  41 /* flush data cache */
  42 static __inline__ void sparc_dcache_flush_all(void)
  43 {
  44       __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"::"i"(ASI_DFLUSH):"memory");
  45 }
  46
  47 /* flush instruction cache */
  48 static __inline__ void sparc_icache_flush_all(void)
  49 {
  50       __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"::"i"(ASI_IFLUSH):"memory");
  51 }
  52
  53 /* do a cache miss load */
  54 static __inline__ unsigned long long sparc_load_reg_cachemiss_qword(unsigned
  55                                                                     long paddr)
  56 {
  57         unsigned long long retval;
  58         __asm__ __volatile__("ldda [%1] %2, %0\n\t":
  59                              "=r"(retval):"r"(paddr), "i"(ASI_CACHEMISS));
  60         return retval;
  61 }
  62
  63 static __inline__ unsigned long sparc_load_reg_cachemiss(unsigned long paddr)
  64 {
  65         unsigned long retval;
  66         __asm__ __volatile__("lda [%1] %2, %0\n\t":
  67                              "=r"(retval):"r"(paddr), "i"(ASI_CACHEMISS));
  68         return retval;
  69 }
  70
  71 static __inline__ unsigned short sparc_load_reg_cachemiss_word(unsigned long
  72                                                                paddr)
  73 {
  74         unsigned short retval;
  75         __asm__ __volatile__("lduha [%1] %2, %0\n\t":
  76                              "=r"(retval):"r"(paddr), "i"(ASI_CACHEMISS));
  77         return retval;
  78 }
  79
  80 static __inline__ unsigned char sparc_load_reg_cachemiss_byte(unsigned long
  81                                                               paddr)
  82 {
  83         unsigned char retval;
  84         __asm__ __volatile__("lduba [%1] %2, %0\n\t":
  85                              "=r"(retval):"r"(paddr), "i"(ASI_CACHEMISS));
  86         return retval;
  87 }
  88
  89 /* do a physical address bypass write, i.e. for 0x80000000 */
  90 static __inline__ void sparc_store_reg_bypass(unsigned long paddr,
  91                                               unsigned long value)
  92 {
  93         __asm__ __volatile__("sta %0, [%1] %2\n\t"::"r"(value), "r"(paddr),
  94                              "i"(ASI_BYPASS):"memory");
  95 }
  96
  97 static __inline__ unsigned long sparc_load_reg_bypass(unsigned long paddr)
  98 {
  99         unsigned long retval;
 100         __asm__ __volatile__("lda [%1] %2, %0\n\t":
 101                              "=r"(retval):"r"(paddr), "i"(ASI_BYPASS));
 102         return retval;
 103 }
 104
 105 /* Macros for bypassing cache when reading */
 106 #define SPARC_NOCACHE_READ_DWORD(address) sparc_load_reg_cachemiss_qword((unsigned int)(address))
 107 #define SPARC_NOCACHE_READ(address)       sparc_load_reg_cachemiss((unsigned int)(address))
 108 #define SPARC_NOCACHE_READ_HWORD(address) sparc_load_reg_cachemiss_word((unsigned int)(address))
 109 #define SPARC_NOCACHE_READ_BYTE(address)  sparc_load_reg_cachemiss_byte((unsigned int)(address))
 110
 111 #define SPARC_BYPASS_READ(address)        sparc_load_reg_bypass((unsigned int)(address))
 112 #define SPARC_BYPASS_WRITE(address,value) sparc_store_reg_bypass((unsigned int)(address),(unsigned int)(value))
 113
 114 #endif
 115
 116 #endif                          /* __ASM_SPARC_PROCESSOR_H */