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  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #ifndef __ASM_SPARC_PROCESSOR_H
  11 #define __ASM_SPARC_PROCESSOR_H
  12
  13 #include <asm/arch/asi.h>
  14
  15 #ifdef CONFIG_LEON
  16
  17 /* All LEON processors supported */
  18 #include <asm/leon.h>
  19
  20 #else
  21 /* other processors */
  22 #error Unknown SPARC Processor
  23 #endif
  24
  25 #ifndef __ASSEMBLY__
  26
  27 /* flush data cache */
  28 static __inline__ void sparc_dcache_flush_all(void)
  29 {
  30       __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"::"i"(ASI_DFLUSH):"memory");
  31 }
  32
  33 /* flush instruction cache */
  34 static __inline__ void sparc_icache_flush_all(void)
  35 {
  36       __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"::"i"(ASI_IFLUSH):"memory");
  37 }
  38
  39 /* do a cache miss load */
  40 static __inline__ unsigned long long sparc_load_reg_cachemiss_qword(unsigned
  41                                                                     long paddr)
  42 {
  43         unsigned long long retval;
  44         __asm__ __volatile__("ldda [%1] %2, %0\n\t":
  45                              "=r"(retval):"r"(paddr), "i"(ASI_CACHEMISS));
  46         return retval;
  47 }
  48
  49 static __inline__ unsigned long sparc_load_reg_cachemiss(unsigned long paddr)
  50 {
  51         unsigned long retval;
  52         __asm__ __volatile__("lda [%1] %2, %0\n\t":
  53                              "=r"(retval):"r"(paddr), "i"(ASI_CACHEMISS));
  54         return retval;
  55 }
  56
  57 static __inline__ unsigned short sparc_load_reg_cachemiss_word(unsigned long
  58                                                                paddr)
  59 {
  60         unsigned short retval;
  61         __asm__ __volatile__("lduha [%1] %2, %0\n\t":
  62                              "=r"(retval):"r"(paddr), "i"(ASI_CACHEMISS));
  63         return retval;
  64 }
  65
  66 static __inline__ unsigned char sparc_load_reg_cachemiss_byte(unsigned long
  67                                                               paddr)
  68 {
  69         unsigned char retval;
  70         __asm__ __volatile__("lduba [%1] %2, %0\n\t":
  71                              "=r"(retval):"r"(paddr), "i"(ASI_CACHEMISS));
  72         return retval;
  73 }
  74
  75 /* do a physical address bypass write, i.e. for 0x80000000 */
  76 static __inline__ void sparc_store_reg_bypass(unsigned long paddr,
  77                                               unsigned long value)
  78 {
  79         __asm__ __volatile__("sta %0, [%1] %2\n\t"::"r"(value), "r"(paddr),
  80                              "i"(ASI_BYPASS):"memory");
  81 }
  82
  83 static __inline__ unsigned long sparc_load_reg_bypass(unsigned long paddr)
  84 {
  85         unsigned long retval;
  86         __asm__ __volatile__("lda [%1] %2, %0\n\t":
  87                              "=r"(retval):"r"(paddr), "i"(ASI_BYPASS));
  88         return retval;
  89 }
  90
  91 /* Macros for bypassing cache when reading */
  92 #define SPARC_NOCACHE_READ_DWORD(address) sparc_load_reg_cachemiss_qword((unsigned int)(address))
  93 #define SPARC_NOCACHE_READ(address)       sparc_load_reg_cachemiss((unsigned int)(address))
  94 #define SPARC_NOCACHE_READ_HWORD(address) sparc_load_reg_cachemiss_word((unsigned int)(address))
  95 #define SPARC_NOCACHE_READ_BYTE(address)  sparc_load_reg_cachemiss_byte((unsigned int)(address))
  96
  97 #define SPARC_BYPASS_READ(address)        sparc_load_reg_bypass((unsigned int)(address))
  98 #define SPARC_BYPASS_WRITE(address,value) sparc_store_reg_bypass((unsigned int)(address),(unsigned int)(value))
  99
 100 #endif
 101
 102 #endif                          /* __ASM_SPARC_PROCESSOR_H */