supp_reg.h

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#ifndef __SUPP_REG_H__
#define __SUPP_REG_H__

/* Macros for reading and writing support/special registers. */

#ifndef STRINGIFYFY
#define STRINGIFYFY(i) #i
#endif

#ifndef STRINGIFY
#define STRINGIFY(i) STRINGIFYFY(i)
#endif

#define SPEC_REG_BZ     "BZ"
#define SPEC_REG_VR     "VR"
#define SPEC_REG_PID    "PID"
#define SPEC_REG_SRS    "SRS"
#define SPEC_REG_WZ     "WZ"
#define SPEC_REG_EXS    "EXS"
#define SPEC_REG_EDA    "EDA"
#define SPEC_REG_MOF    "MOF"
#define SPEC_REG_DZ     "DZ"
#define SPEC_REG_EBP    "EBP"
#define SPEC_REG_ERP    "ERP"
#define SPEC_REG_SRP    "SRP"
#define SPEC_REG_NRP    "NRP"
#define SPEC_REG_CCS    "CCS"
#define SPEC_REG_USP    "USP"
#define SPEC_REG_SPC    "SPC"

#define RW_MM_CFG       0
#define RW_MM_KBASE_LO  1
#define RW_MM_KBASE_HI  2
#define RW_MM_CAUSE     3
#define RW_MM_TLB_SEL   4
#define RW_MM_TLB_LO    5
#define RW_MM_TLB_HI    6
#define RW_MM_TLB_PGD   7

#define BANK_GC     0
#define BANK_IM     1
#define BANK_DM     2
#define BANK_BP     3

#define RW_GC_CFG       0
#define RW_GC_CCS       1
#define RW_GC_SRS       2
#define RW_GC_NRP       3
#define RW_GC_EXS       4
#define RW_GC_R0        8
#define RW_GC_R1        9

#define SPEC_REG_WR(r,v) \
__asm__ __volatile__ ("move %0, $" r : : "r" (v));

#define SPEC_REG_RD(r,v) \
__asm__ __volatile__ ("move $" r ",%0" : "=r" (v));

#define NOP() \
    __asm__ __volatile__ ("nop");

#define SUPP_BANK_SEL(b)        \
    SPEC_REG_WR(SPEC_REG_SRS,b);    \
    NOP();              \
    NOP();              \
    NOP();

#define SUPP_REG_WR(r,v) \
__asm__ __volatile__ ("move %0, $S" STRINGIFYFY(r) "\n\t"   \
              "nop\n\t"                 \
              "nop\n\t"                 \
              "nop\n\t"                 \
              : : "r" (v));

#define SUPP_REG_RD(r,v) \
__asm__ __volatile__ ("move $S" STRINGIFYFY(r) ",%0" : "=r" (v));

#endif /* __SUPP_REG_H__ */