Macros to access the register of processors using the new MIPS

Multithreading ASE, also know as MT ASE.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/include/asm-mips/mipsmtregs.h b/include/asm-mips/mipsmtregs.h
new file mode 100644

1 files changed, 367 insertions, 0 deletions

diff --git a/include/asm-mips/mipsmtregs.h b/include/asm-mips/mipsmtregs.h
new file mode 100644
index 000000000000..9aaefc13a2b3
--- /dev/null
+++ b/include/asm-mips/mipsmtregs.h
@@ -0,0 +1,367 @@
+/*
+ * MT regs definitions, follows on from mipsregs.h
+ * Copyright (C) 2004 - 2005 MIPS Technologies, Inc.  All rights reserved.
+ * Elizabeth Clarke et. al.
+ *
+ */
+#ifndef _ASM_MIPSMTREGS_H
+#define _ASM_MIPSMTREGS_H
+
+#include <asm/war.h>
+
+#ifndef __ASSEMBLY__
+
+/*
+ * C macros
+ */
+
+#define read_c0_mvpcontrol()            __read_32bit_c0_register($0, 1)
+#define write_c0_mvpcontrol(val)        __write_32bit_c0_register($0, 1, val)
+
+#define read_c0_mvpconf0()              __read_32bit_c0_register($0, 2)
+#define read_c0_mvpconf1()              __read_32bit_c0_register($0, 3)
+
+#define read_c0_vpecontrol()            __read_32bit_c0_register($1, 1)
+#define write_c0_vpecontrol(val)        __write_32bit_c0_register($1, 1, val)
+
+#define read_c0_vpeconf0()              __read_32bit_c0_register($1, 2)
+#define write_c0_vpeconf0(val)          __write_32bit_c0_register($1, 2, val)
+
+#define read_c0_tcstatus()              __read_32bit_c0_register($2, 1)
+#define write_c0_tcstatus(val)          __write_32bit_c0_register($2, 1, val)
+
+#define read_c0_tcbind()                __read_32bit_c0_register($2, 2)
+
+#define read_c0_tccontext()             __read_32bit_c0_register($2, 5)
+#define write_c0_tccontext(val)         __write_32bit_c0_register($2, 5, val)
+
+#else /* Assembly */
+/*
+ * Macros for use in assembly language code
+ */
+
+#define CP0_MVPCONTROL          $0,1
+#define CP0_MVPCONF0            $0,2
+#define CP0_MVPCONF1            $0,3
+#define CP0_VPECONTROL          $1,1
+#define CP0_VPECONF0            $1,2
+#define CP0_VPECONF1            $1,3
+#define CP0_YQMASK              $1,4
+#define CP0_VPESCHEDULE $1,5
+#define CP0_VPESCHEFBK          $1,6
+#define CP0_TCSTATUS            $2,1
+#define CP0_TCBIND              $2,2
+#define CP0_TCRESTART           $2,3
+#define CP0_TCHALT              $2,4
+#define CP0_TCCONTEXT           $2,5
+#define CP0_TCSCHEDULE          $2,6
+#define CP0_TCSCHEFBK           $2,7
+#define CP0_SRSCONF0            $6,1
+#define CP0_SRSCONF1            $6,2
+#define CP0_SRSCONF2            $6,3
+#define CP0_SRSCONF3            $6,4
+#define CP0_SRSCONF4            $6,5
+
+#endif
+
+/* MVPControl fields */
+#define MVPCONTROL_EVP          (_ULCAST_(1))
+
+#define MVPCONTROL_VPC_SHIFT    1
+#define MVPCONTROL_VPC          (_ULCAST_(1) << MVPCONTROL_VPC_SHIFT)
+
+#define MVPCONTROL_STLB_SHIFT   2
+#define MVPCONTROL_STLB         (_ULCAST_(1) << MVPCONTROL_STLB_SHIFT)
+
+
+/* MVPConf0 fields */
+#define MVPCONF0_PTC_SHIFT      0
+#define MVPCONF0_PTC            ( _ULCAST_(0xff))
+#define MVPCONF0_PVPE_SHIFT     10
+#define MVPCONF0_PVPE           ( _ULCAST_(0xf) << MVPCONF0_PVPE_SHIFT)
+#define MVPCONF0_TCA_SHIFT      15
+#define MVPCONF0_TCA            ( _ULCAST_(1) << MVPCONF0_TCA_SHIFT)
+#define MVPCONF0_PTLBE_SHIFT    16
+#define MVPCONF0_PTLBE          (_ULCAST_(0x3ff) << MVPCONF0_PTLBE_SHIFT)
+#define MVPCONF0_TLBS_SHIFT     29
+#define MVPCONF0_TLBS           (_ULCAST_(1) << MVPCONF0_TLBS_SHIFT)
+#define MVPCONF0_M_SHIFT        31
+#define MVPCONF0_M              (_ULCAST_(0x1) << MVPCONF0_M_SHIFT)
+
+
+/* config3 fields */
+#define CONFIG3_MT_SHIFT        2
+#define CONFIG3_MT              (_ULCAST_(1) << CONFIG3_MT_SHIFT)
+
+
+/* VPEControl fields (per VPE) */
+#define VPECONTROL_TARGTC       (_ULCAST_(0xff))
+
+#define VPECONTROL_TE_SHIFT     15
+#define VPECONTROL_TE           (_ULCAST_(1) << VPECONTROL_TE_SHIFT)
+#define VPECONTROL_EXCPT_SHIFT  16
+#define VPECONTROL_EXCPT        (_ULCAST_(0x7) << VPECONTROL_EXCPT_SHIFT)
+
+/* Thread Exception Codes for EXCPT field */
+#define THREX_TU                0
+#define THREX_TO                1
+#define THREX_IYQ               2
+#define THREX_GSX               3
+#define THREX_YSCH              4
+#define THREX_GSSCH             5
+
+#define VPECONTROL_GSI_SHIFT    20
+#define VPECONTROL_GSI          (_ULCAST_(1) << VPECONTROL_GSI_SHIFT)
+#define VPECONTROL_YSI_SHIFT    21
+#define VPECONTROL_YSI          (_ULCAST_(1) << VPECONTROL_YSI_SHIFT)
+
+/* VPEConf0 fields (per VPE) */
+#define VPECONF0_VPA_SHIFT      0
+#define VPECONF0_VPA            (_ULCAST_(1) << VPECONF0_VPA_SHIFT)
+#define VPECONF0_MVP_SHIFT      1
+#define VPECONF0_MVP            (_ULCAST_(1) << VPECONF0_MVP_SHIFT)
+#define VPECONF0_XTC_SHIFT      21
+#define VPECONF0_XTC            (_ULCAST_(0xff) << VPECONF0_XTC_SHIFT)
+
+/* TCStatus fields (per TC) */
+#define TCSTATUS_TASID          (_ULCAST_(0xff))
+#define TCSTATUS_IXMT_SHIFT     10
+#define TCSTATUS_IXMT           (_ULCAST_(1) << TCSTATUS_IXMT_SHIFT)
+#define TCSTATUS_TKSU_SHIFT     11
+#define TCSTATUS_TKSU           (_ULCAST_(3) << TCSTATUS_TKSU_SHIFT)
+#define TCSTATUS_A_SHIFT        13
+#define TCSTATUS_A              (_ULCAST_(1) << TCSTATUS_A_SHIFT)
+#define TCSTATUS_DA_SHIFT       15
+#define TCSTATUS_DA             (_ULCAST_(1) << TCSTATUS_DA_SHIFT)
+#define TCSTATUS_DT_SHIFT       20
+#define TCSTATUS_DT             (_ULCAST_(1) << TCSTATUS_DT_SHIFT)
+#define TCSTATUS_TDS_SHIFT      21
+#define TCSTATUS_TDS            (_ULCAST_(1) << TCSTATUS_TDS_SHIFT)
+#define TCSTATUS_TSST_SHIFT     22
+#define TCSTATUS_TSST           (_ULCAST_(1) << TCSTATUS_TSST_SHIFT)
+#define TCSTATUS_RNST_SHIFT     23
+#define TCSTATUS_RNST           (_ULCAST_(3) << TCSTATUS_RNST_SHIFT)
+/* Codes for RNST */
+#define TC_RUNNING              0
+#define TC_WAITING              1
+#define TC_YIELDING             2
+#define TC_GATED                3
+
+#define TCSTATUS_TMX_SHIFT      27
+#define TCSTATUS_TMX            (_ULCAST_(1) << TCSTATUS_TMX_SHIFT)
+/* TCStatus TCU bits can use same definitions/offsets as CU bits in Status */
+
+/* TCBind */
+#define TCBIND_CURVPE_SHIFT     0
+#define TCBIND_CURVPE           (_ULCAST_(0xf))
+
+#define TCBIND_CURTC_SHIFT      21
+
+#define TCBIND_CURTC            (_ULCAST_(0xff) << TCBIND_CURTC_SHIFT)
+
+/* TCHalt */
+#define TCHALT_H                (_ULCAST_(1))
+
+#ifndef __ASSEMBLY__
+
+extern void mips_mt_regdump(void);
+
+static inline unsigned int dvpe(void)
+{
+        int res = 0;
+
+        __asm__ __volatile__(
+        "       .set    push                                            \n"
+        "       .set    noreorder                                       \n"
+        "       .set    noat                                            \n"
+        "       .set    mips32r2                                        \n"
+        "       move    $1, %0                                          \n"
+        "       .word   0x41610001              # dvpe $1               \n"
+        "       ehb                                                     \n"
+        "       .set    pop                                             \n"
+        : "=r" (res));
+
+        instruction_hazard();
+
+        return res;
+}
+
+static inline void __raw_evpe(void)
+{
+        __asm__ __volatile__(
+        "       .set    push                                            \n"
+        "       .set    noreorder                                       \n"
+        "       .set    noat                                            \n"
+        "       .set    mips32r2                                        \n"
+        "       .word   0x41600021              # evpe                  \n"
+        "       ehb                                                     \n"
+        "       .set    pop                                             \n");
+}
+
+/* Enable multiMT if previous suggested it should be.
+   EMT_ENABLE to force */
+
+#define EVPE_ENABLE MVPCONTROL_EVP
+
+static inline void evpe(int previous)
+{
+        if ((previous & MVPCONTROL_EVP))
+                __raw_evpe();
+}
+
+static inline unsigned int dmt(void)
+{
+        int res;
+
+        __asm__ __volatile__(
+        "       .set    noreorder                                       \n"
+        "       .set    mips32r2                                        \n"
+        "       dmt     %0                                              \n"
+        "       ehb                                                     \n"
+        "       .set mips0                                              \n"
+        "       .set reorder                                            \n"
+        : "=r" (res));
+
+        instruction_hazard();
+
+        return res;
+}
+
+static inline void __raw_emt(void)
+{
+        __asm__ __volatile__(
+        "       .set    noreorder                                       \n"
+        "       .set    mips32r2                                        \n"
+        "       emt                                                     \n"
+        "       ehb                                                     \n"
+        "       .set    mips0                                           \n"
+        "       .set    reorder");
+}
+
+/* enable multiVPE if previous suggested it should be.
+   EVPE_ENABLE to force */
+
+#define EMT_ENABLE VPECONTROL_TE
+
+static inline void emt(int previous)
+{
+        if ((previous & EMT_ENABLE))
+                __raw_emt();
+}
+
+static inline void ehb(void)
+{
+        __asm__ __volatile__("ehb");
+}
+
+#define mftc0(rt,sel)                                                   \
+({                                                                      \
+         unsigned long  __res;                                          \
+                                                                        \
+        __asm__ __volatile__(                                           \
+         "      .set noat\n\t"                                          \
+         "      mftc0\t%0," #rt ", " #sel "\n\t"                        \
+         "      .set at\n\t"                                            \
+         : "=r" (__res));                                               \
+                                                                        \
+        __res;                                                          \
+})
+
+#define mftgpr(rt)                                                      \
+({                                                                      \
+        unsigned long __res;                                            \
+                                                                        \
+        __asm__ __volatile__(                                           \
+        "       .set    noat                                    \n"     \
+        "       mftgpr  %0," #rt "                              \n"     \
+        "       .set    at                                      \n"     \
+        : "=r" (__res));                                                \
+                                                                        \
+        __res;                                                          \
+})
+
+#define mftr(rt,u,sel)                                                  \
+({                                                                      \
+        unsigned long __res;                                            \
+                                                                        \
+        __asm__ __volatile__(                                           \
+        ".set noat\n\t"                                                 \
+        "mftr\t%0, " #rt ", " #u ", " #sel "\n\t"                       \
+        ".set at\n\t"                                                   \
+        : "=r" (__res));                                                \
+                                                                        \
+        __res;                                                          \
+})
+
+#define mttgpr(rd,v)                                                    \
+({                                                                      \
+        __asm__ __volatile__(                                           \
+        "mttgpr %0," #rd                                                \
+        : : "r" (v));                                                   \
+})
+
+#define mttc0(rd,sel,v)                                                 \
+({                                                                      \
+        __asm__ __volatile__(                                           \
+        "mttc0\t %0," #rd ", " #sel                                     \
+        : : "r" (v));                                                   \
+})
+
+
+#define mttr(rd,u,sel,v)                                                \
+({                                                                      \
+        __asm__ __volatile__(                                           \
+        "mttr   %0," #rd ", " #u ", " #sel                              \
+        : : "r" (v));                                                   \
+})
+
+
+#define settc(tc)                                                       \
+do {                                                                    \
+        write_c0_vpecontrol((read_c0_vpecontrol()&~VPECONTROL_TARGTC) | (tc)); \
+        ehb();                                                          \
+} while (0)
+
+
+/* you *must* set the target tc (settc) before trying to use these */
+#define read_vpe_c0_vpecontrol()        mftc0($1, 1)
+#define write_vpe_c0_vpecontrol(val)    mttc0($1, 1, val)
+#define read_vpe_c0_vpeconf0()          mftc0($1, 2)
+#define write_vpe_c0_vpeconf0(val)      mttc0($1, 2, val)
+#define read_vpe_c0_status()            mftc0($12, 0)
+#define write_vpe_c0_status(val)        mttc0($12, 0, val)
+#define read_vpe_c0_cause()             mftc0($13, 0)
+#define write_vpe_c0_cause(val)         mttc0($13, 0, val)
+#define read_vpe_c0_config()            mftc0($16, 0)
+#define write_vpe_c0_config(val)        mttc0($16, 0, val)
+#define read_vpe_c0_config1()           mftc0($16, 1)
+#define write_vpe_c0_config1(val)       mttc0($16, 1, val)
+#define read_vpe_c0_config7()           mftc0($16, 7)
+#define write_vpe_c0_config7(val)       mttc0($16, 7, val)
+#define read_vpe_c0_ebase()             mftc0($15,1)
+#define write_vpe_c0_ebase(val)         mttc0($15, 1, val)
+#define write_vpe_c0_compare(val)       mttc0($11, 0, val)
+
+
+/* TC */
+#define read_tc_c0_tcstatus()           mftc0($2, 1)
+#define write_tc_c0_tcstatus(val)       mttc0($2,1,val)
+#define read_tc_c0_tcbind()             mftc0($2, 2)
+#define write_tc_c0_tcbind(val)         mttc0($2,2,val)
+#define read_tc_c0_tcrestart()          mftc0($2, 3)
+#define write_tc_c0_tcrestart(val)      mttc0($2,3,val)
+#define read_tc_c0_tchalt()             mftc0($2, 4)
+#define write_tc_c0_tchalt(val)         mttc0($2,4,val)
+#define read_tc_c0_tccontext()          mftc0($2, 5)
+#define write_tc_c0_tccontext(val)      mttc0($2,5,val)
+
+/* GPR */
+#define read_tc_gpr_sp()                mftgpr($29)
+#define write_tc_gpr_sp(val)            mttgpr($29, val)
+#define read_tc_gpr_gp()                mftgpr($28)
+#define write_tc_gpr_gp(val)            mttgpr($28, val)
+
+
+#endif /* Not __ASSEMBLY__ */
+
+#endif