MIPS: Fix VZ probe gas errors with binutils <2.24
authorJames Hogan <james.hogan@imgtec.com>
Mon, 16 May 2016 11:50:04 +0000 (12:50 +0100)
committerRalf Baechle <ralf@linux-mips.org>
Tue, 17 May 2016 09:06:04 +0000 (11:06 +0200)
The VZ guest register & TLB access macros introduced in commit "MIPS:
Add guest CP0 accessors" use VZ ASE specific instructions that aren't
understood by versions of binutils prior to 2.24.

Add a check for whether the toolchain supports the -mvirt option,
similar to the MSA toolchain check, and implement the accessors using
.word if not.

Due to difficulty in converting compiler specified registers (e.g. "$3")
to usable numbers (e.g. "3") in inline asm, we need to copy to/from a
temporary register, namely the assembler temporary (at/$1), and specify
guest CP0 registers numerically in the gc0 macros.

Fixes: 7eb91118227d ("MIPS: Add guest CP0 accessors")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-next@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13255/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/Makefile
arch/mips/include/asm/mipsregs.h

index c0b002a09befe4d80701b736411fa207893969d0..efd7a9dc93c4161a381081c569a5b4e91b182f5e 100644 (file)
@@ -200,6 +200,8 @@ ifeq ($(CONFIG_CPU_HAS_MSA),y)
 toolchain-msa                          := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
 cflags-$(toolchain-msa)                        += -DTOOLCHAIN_SUPPORTS_MSA
 endif
+toolchain-virt                         := $(call cc-option-yn,$(mips-cflags) -mvirt)
+cflags-$(toolchain-virt)               += -DTOOLCHAIN_SUPPORTS_VIRT
 
 cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_NEVER)   += -mcompact-branches=never
 cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_OPTIMAL) += -mcompact-branches=optimal
index 1019de6bb2a89143c6658d6ce5d47ad01eaf3a49..25d01577d0b564943f282960b67751e5bf84636a 100644 (file)
@@ -1683,15 +1683,18 @@ do {                                                                    \
  * Macros to access the guest system control coprocessor
  */
 
+#ifdef TOOLCHAIN_SUPPORTS_VIRT
+
 #define __read_32bit_gc0_register(source, sel)                         \
 ({ int __res;                                                          \
        __asm__ __volatile__(                                           \
                ".set\tpush\n\t"                                        \
                ".set\tmips32r2\n\t"                                    \
                ".set\tvirt\n\t"                                        \
-               "mfgc0\t%0, " #source ", " #sel "\n\t"                  \
+               "mfgc0\t%0, $%1, %2\n\t"                                \
                ".set\tpop"                                             \
-               : "=r" (__res));                                        \
+               : "=r" (__res)                                          \
+               : "i" (source), "i" (sel));                             \
        __res;                                                          \
 })
 
@@ -1701,9 +1704,10 @@ do {                                                                     \
                ".set\tpush\n\t"                                        \
                ".set\tmips64r2\n\t"                                    \
                ".set\tvirt\n\t"                                        \
-               "dmfgc0\t%0, " #source ", " #sel "\n\t"                 \
+               "dmfgc0\t%0, $%1, %2\n\t"                       \
                ".set\tpop"                                             \
-               : "=r" (__res));                                        \
+               : "=r" (__res)                                          \
+               : "i" (source), "i" (sel));                             \
        __res;                                                          \
 })
 
@@ -1713,9 +1717,10 @@ do {                                                                     \
                ".set\tpush\n\t"                                        \
                ".set\tmips32r2\n\t"                                    \
                ".set\tvirt\n\t"                                        \
-               "mtgc0\t%z0, " #register ", " #sel "\n\t"               \
+               "mtgc0\t%z0, $%1, %2\n\t"                               \
                ".set\tpop"                                             \
-               : : "Jr" ((unsigned int)(value)));                      \
+               : : "Jr" ((unsigned int)(value)),                       \
+                   "i" (register), "i" (sel));                         \
 } while (0)
 
 #define __write_64bit_gc0_register(register, sel, value)               \
@@ -1724,11 +1729,70 @@ do {                                                                    \
                ".set\tpush\n\t"                                        \
                ".set\tmips64r2\n\t"                                    \
                ".set\tvirt\n\t"                                        \
-               "dmtgc0\t%z0, " #register ", " #sel "\n\t"              \
+               "dmtgc0\t%z0, $%1, %2\n\t"                              \
+               ".set\tpop"                                             \
+               : : "Jr" (value),                                       \
+                   "i" (register), "i" (sel));                         \
+} while (0)
+
+#else  /* TOOLCHAIN_SUPPORTS_VIRT */
+
+#define __read_32bit_gc0_register(source, sel)                         \
+({ int __res;                                                          \
+       __asm__ __volatile__(                                           \
+               ".set\tpush\n\t"                                        \
+               ".set\tnoat\n\t"                                        \
+               "# mfgc0\t$1, $%1, %2\n\t"                              \
+               ".word\t(0x40610000 | %1 << 11 | %2)\n\t"               \
+               "move\t%0, $1\n\t"                                      \
+               ".set\tpop"                                             \
+               : "=r" (__res)                                          \
+               : "i" (source), "i" (sel));                             \
+       __res;                                                          \
+})
+
+#define __read_64bit_gc0_register(source, sel)                         \
+({ unsigned long long __res;                                           \
+       __asm__ __volatile__(                                           \
+               ".set\tpush\n\t"                                        \
+               ".set\tnoat\n\t"                                        \
+               "# dmfgc0\t$1, $%1, %2\n\t"                             \
+               ".word\t(0x40610100 | %1 << 11 | %2)\n\t"               \
+               "move\t%0, $1\n\t"                                      \
+               ".set\tpop"                                             \
+               : "=r" (__res)                                          \
+               : "i" (source), "i" (sel));                             \
+       __res;                                                          \
+})
+
+#define __write_32bit_gc0_register(register, sel, value)               \
+do {                                                                   \
+       __asm__ __volatile__(                                           \
+               ".set\tpush\n\t"                                        \
+               ".set\tnoat\n\t"                                        \
+               "move\t$1, %0\n\t"                                      \
+               "# mtgc0\t$1, $%1, %2\n\t"                              \
+               ".word\t(0x40610200 | %1 << 11 | %2)\n\t"               \
                ".set\tpop"                                             \
-               : : "Jr" (value));                                      \
+               : : "Jr" ((unsigned int)(value)),                       \
+                   "i" (register), "i" (sel));                         \
 } while (0)
 
+#define __write_64bit_gc0_register(register, sel, value)               \
+do {                                                                   \
+       __asm__ __volatile__(                                           \
+               ".set\tpush\n\t"                                        \
+               ".set\tnoat\n\t"                                        \
+               "move\t$1, %0\n\t"                                      \
+               "# dmtgc0\t$1, $%1, %2\n\t"                             \
+               ".word\t(0x40610300 | %1 << 11 | %2)\n\t"               \
+               ".set\tpop"                                             \
+               : : "Jr" (value),                                       \
+                   "i" (register), "i" (sel));                         \
+} while (0)
+
+#endif /* !TOOLCHAIN_SUPPORTS_VIRT */
+
 #define __read_ulong_gc0_register(reg, sel)                            \
        ((sizeof(unsigned long) == 4) ?                                 \
        (unsigned long) __read_32bit_gc0_register(reg, sel) :           \
@@ -1742,189 +1806,189 @@ do {                                                                  \
                __write_64bit_gc0_register(reg, sel, val);              \
 } while (0)
 
-#define read_gc0_index()               __read_32bit_gc0_register($0, 0)
-#define write_gc0_index(val)           __write_32bit_gc0_register($0, 0, val)
+#define read_gc0_index()               __read_32bit_gc0_register(0, 0)
+#define write_gc0_index(val)           __write_32bit_gc0_register(0, 0, val)
 
-#define read_gc0_entrylo0()            __read_ulong_gc0_register($2, 0)
-#define write_gc0_entrylo0(val)                __write_ulong_gc0_register($2, 0, val)
+#define read_gc0_entrylo0()            __read_ulong_gc0_register(2, 0)
+#define write_gc0_entrylo0(val)                __write_ulong_gc0_register(2, 0, val)
 
-#define read_gc0_entrylo1()            __read_ulong_gc0_register($3, 0)
-#define write_gc0_entrylo1(val)                __write_ulong_gc0_register($3, 0, val)
+#define read_gc0_entrylo1()            __read_ulong_gc0_register(3, 0)
+#define write_gc0_entrylo1(val)                __write_ulong_gc0_register(3, 0, val)
 
-#define read_gc0_context()             __read_ulong_gc0_register($4, 0)
-#define write_gc0_context(val)         __write_ulong_gc0_register($4, 0, val)
+#define read_gc0_context()             __read_ulong_gc0_register(4, 0)
+#define write_gc0_context(val)         __write_ulong_gc0_register(4, 0, val)
 
-#define read_gc0_contextconfig()       __read_32bit_gc0_register($4, 1)
-#define write_gc0_contextconfig(val)   __write_32bit_gc0_register($4, 1, val)
+#define read_gc0_contextconfig()       __read_32bit_gc0_register(4, 1)
+#define write_gc0_contextconfig(val)   __write_32bit_gc0_register(4, 1, val)
 
-#define read_gc0_userlocal()           __read_ulong_gc0_register($4, 2)
-#define write_gc0_userlocal(val)       __write_ulong_gc0_register($4, 2, val)
+#define read_gc0_userlocal()           __read_ulong_gc0_register(4, 2)
+#define write_gc0_userlocal(val)       __write_ulong_gc0_register(4, 2, val)
 
-#define read_gc0_xcontextconfig()      __read_ulong_gc0_register($4, 3)
-#define write_gc0_xcontextconfig(val)  __write_ulong_gc0_register($4, 3, val)
+#define read_gc0_xcontextconfig()      __read_ulong_gc0_register(4, 3)
+#define write_gc0_xcontextconfig(val)  __write_ulong_gc0_register(4, 3, val)
 
-#define read_gc0_pagemask()            __read_32bit_gc0_register($5, 0)
-#define write_gc0_pagemask(val)                __write_32bit_gc0_register($5, 0, val)
+#define read_gc0_pagemask()            __read_32bit_gc0_register(5, 0)
+#define write_gc0_pagemask(val)                __write_32bit_gc0_register(5, 0, val)
 
-#define read_gc0_pagegrain()           __read_32bit_gc0_register($5, 1)
-#define write_gc0_pagegrain(val)       __write_32bit_gc0_register($5, 1, val)
+#define read_gc0_pagegrain()           __read_32bit_gc0_register(5, 1)
+#define write_gc0_pagegrain(val)       __write_32bit_gc0_register(5, 1, val)
 
-#define read_gc0_segctl0()             __read_ulong_gc0_register($5, 2)
-#define write_gc0_segctl0(val)         __write_ulong_gc0_register($5, 2, val)
+#define read_gc0_segctl0()             __read_ulong_gc0_register(5, 2)
+#define write_gc0_segctl0(val)         __write_ulong_gc0_register(5, 2, val)
 
-#define read_gc0_segctl1()             __read_ulong_gc0_register($5, 3)
-#define write_gc0_segctl1(val)         __write_ulong_gc0_register($5, 3, val)
+#define read_gc0_segctl1()             __read_ulong_gc0_register(5, 3)
+#define write_gc0_segctl1(val)         __write_ulong_gc0_register(5, 3, val)
 
-#define read_gc0_segctl2()             __read_ulong_gc0_register($5, 4)
-#define write_gc0_segctl2(val)         __write_ulong_gc0_register($5, 4, val)
-
-#define read_gc0_pwbase()              __read_ulong_gc0_register($5, 5)
-#define write_gc0_pwbase(val)          __write_ulong_gc0_register($5, 5, val)
-
-#define read_gc0_pwfield()             __read_ulong_gc0_register($5, 6)
-#define write_gc0_pwfield(val)         __write_ulong_gc0_register($5, 6, val)
-
-#define read_gc0_pwsize()              __read_ulong_gc0_register($5, 7)
-#define write_gc0_pwsize(val)          __write_ulong_gc0_register($5, 7, val)
-
-#define read_gc0_wired()               __read_32bit_gc0_register($6, 0)
-#define write_gc0_wired(val)           __write_32bit_gc0_register($6, 0, val)
-
-#define read_gc0_pwctl()               __read_32bit_gc0_register($6, 6)
-#define write_gc0_pwctl(val)           __write_32bit_gc0_register($6, 6, val)
-
-#define read_gc0_hwrena()              __read_32bit_gc0_register($7, 0)
-#define write_gc0_hwrena(val)          __write_32bit_gc0_register($7, 0, val)
-
-#define read_gc0_badvaddr()            __read_ulong_gc0_register($8, 0)
-#define write_gc0_badvaddr(val)                __write_ulong_gc0_register($8, 0, val)
-
-#define read_gc0_badinstr()            __read_32bit_gc0_register($8, 1)
-#define write_gc0_badinstr(val)                __write_32bit_gc0_register($8, 1, val)
-
-#define read_gc0_badinstrp()           __read_32bit_gc0_register($8, 2)
-#define write_gc0_badinstrp(val)       __write_32bit_gc0_register($8, 2, val)
-
-#define read_gc0_count()               __read_32bit_gc0_register($9, 0)
-
-#define read_gc0_entryhi()             __read_ulong_gc0_register($10, 0)
-#define write_gc0_entryhi(val)         __write_ulong_gc0_register($10, 0, val)
-
-#define read_gc0_compare()             __read_32bit_gc0_register($11, 0)
-#define write_gc0_compare(val)         __write_32bit_gc0_register($11, 0, val)
-
-#define read_gc0_status()              __read_32bit_gc0_register($12, 0)
-#define write_gc0_status(val)          __write_32bit_gc0_register($12, 0, val)
-
-#define read_gc0_intctl()              __read_32bit_gc0_register($12, 1)
-#define write_gc0_intctl(val)          __write_32bit_gc0_register($12, 1, val)
-
-#define read_gc0_cause()               __read_32bit_gc0_register($13, 0)
-#define write_gc0_cause(val)           __write_32bit_gc0_register($13, 0, val)
-
-#define read_gc0_epc()                 __read_ulong_gc0_register($14, 0)
-#define write_gc0_epc(val)             __write_ulong_gc0_register($14, 0, val)
-
-#define read_gc0_ebase()               __read_32bit_gc0_register($15, 1)
-#define write_gc0_ebase(val)           __write_32bit_gc0_register($15, 1, val)
-
-#define read_gc0_ebase_64()            __read_64bit_gc0_register($15, 1)
-#define write_gc0_ebase_64(val)                __write_64bit_gc0_register($15, 1, val)
-
-#define read_gc0_config()              __read_32bit_gc0_register($16, 0)
-#define read_gc0_config1()             __read_32bit_gc0_register($16, 1)
-#define read_gc0_config2()             __read_32bit_gc0_register($16, 2)
-#define read_gc0_config3()             __read_32bit_gc0_register($16, 3)
-#define read_gc0_config4()             __read_32bit_gc0_register($16, 4)
-#define read_gc0_config5()             __read_32bit_gc0_register($16, 5)
-#define read_gc0_config6()             __read_32bit_gc0_register($16, 6)
-#define read_gc0_config7()             __read_32bit_gc0_register($16, 7)
-#define write_gc0_config(val)          __write_32bit_gc0_register($16, 0, val)
-#define write_gc0_config1(val)         __write_32bit_gc0_register($16, 1, val)
-#define write_gc0_config2(val)         __write_32bit_gc0_register($16, 2, val)
-#define write_gc0_config3(val)         __write_32bit_gc0_register($16, 3, val)
-#define write_gc0_config4(val)         __write_32bit_gc0_register($16, 4, val)
-#define write_gc0_config5(val)         __write_32bit_gc0_register($16, 5, val)
-#define write_gc0_config6(val)         __write_32bit_gc0_register($16, 6, val)
-#define write_gc0_config7(val)         __write_32bit_gc0_register($16, 7, val)
-
-#define read_gc0_watchlo0()            __read_ulong_gc0_register($18, 0)
-#define read_gc0_watchlo1()            __read_ulong_gc0_register($18, 1)
-#define read_gc0_watchlo2()            __read_ulong_gc0_register($18, 2)
-#define read_gc0_watchlo3()            __read_ulong_gc0_register($18, 3)
-#define read_gc0_watchlo4()            __read_ulong_gc0_register($18, 4)
-#define read_gc0_watchlo5()            __read_ulong_gc0_register($18, 5)
-#define read_gc0_watchlo6()            __read_ulong_gc0_register($18, 6)
-#define read_gc0_watchlo7()            __read_ulong_gc0_register($18, 7)
-#define write_gc0_watchlo0(val)                __write_ulong_gc0_register($18, 0, val)
-#define write_gc0_watchlo1(val)                __write_ulong_gc0_register($18, 1, val)
-#define write_gc0_watchlo2(val)                __write_ulong_gc0_register($18, 2, val)
-#define write_gc0_watchlo3(val)                __write_ulong_gc0_register($18, 3, val)
-#define write_gc0_watchlo4(val)                __write_ulong_gc0_register($18, 4, val)
-#define write_gc0_watchlo5(val)                __write_ulong_gc0_register($18, 5, val)
-#define write_gc0_watchlo6(val)                __write_ulong_gc0_register($18, 6, val)
-#define write_gc0_watchlo7(val)                __write_ulong_gc0_register($18, 7, val)
-
-#define read_gc0_watchhi0()            __read_32bit_gc0_register($19, 0)
-#define read_gc0_watchhi1()            __read_32bit_gc0_register($19, 1)
-#define read_gc0_watchhi2()            __read_32bit_gc0_register($19, 2)
-#define read_gc0_watchhi3()            __read_32bit_gc0_register($19, 3)
-#define read_gc0_watchhi4()            __read_32bit_gc0_register($19, 4)
-#define read_gc0_watchhi5()            __read_32bit_gc0_register($19, 5)
-#define read_gc0_watchhi6()            __read_32bit_gc0_register($19, 6)
-#define read_gc0_watchhi7()            __read_32bit_gc0_register($19, 7)
-#define write_gc0_watchhi0(val)                __write_32bit_gc0_register($19, 0, val)
-#define write_gc0_watchhi1(val)                __write_32bit_gc0_register($19, 1, val)
-#define write_gc0_watchhi2(val)                __write_32bit_gc0_register($19, 2, val)
-#define write_gc0_watchhi3(val)                __write_32bit_gc0_register($19, 3, val)
-#define write_gc0_watchhi4(val)                __write_32bit_gc0_register($19, 4, val)
-#define write_gc0_watchhi5(val)                __write_32bit_gc0_register($19, 5, val)
-#define write_gc0_watchhi6(val)                __write_32bit_gc0_register($19, 6, val)
-#define write_gc0_watchhi7(val)                __write_32bit_gc0_register($19, 7, val)
-
-#define read_gc0_xcontext()            __read_ulong_gc0_register($20, 0)
-#define write_gc0_xcontext(val)                __write_ulong_gc0_register($20, 0, val)
-
-#define read_gc0_perfctrl0()           __read_32bit_gc0_register($25, 0)
-#define write_gc0_perfctrl0(val)       __write_32bit_gc0_register($25, 0, val)
-#define read_gc0_perfcntr0()           __read_32bit_gc0_register($25, 1)
-#define write_gc0_perfcntr0(val)       __write_32bit_gc0_register($25, 1, val)
-#define read_gc0_perfcntr0_64()                __read_64bit_gc0_register($25, 1)
-#define write_gc0_perfcntr0_64(val)    __write_64bit_gc0_register($25, 1, val)
-#define read_gc0_perfctrl1()           __read_32bit_gc0_register($25, 2)
-#define write_gc0_perfctrl1(val)       __write_32bit_gc0_register($25, 2, val)
-#define read_gc0_perfcntr1()           __read_32bit_gc0_register($25, 3)
-#define write_gc0_perfcntr1(val)       __write_32bit_gc0_register($25, 3, val)
-#define read_gc0_perfcntr1_64()                __read_64bit_gc0_register($25, 3)
-#define write_gc0_perfcntr1_64(val)    __write_64bit_gc0_register($25, 3, val)
-#define read_gc0_perfctrl2()           __read_32bit_gc0_register($25, 4)
-#define write_gc0_perfctrl2(val)       __write_32bit_gc0_register($25, 4, val)
-#define read_gc0_perfcntr2()           __read_32bit_gc0_register($25, 5)
-#define write_gc0_perfcntr2(val)       __write_32bit_gc0_register($25, 5, val)
-#define read_gc0_perfcntr2_64()                __read_64bit_gc0_register($25, 5)
-#define write_gc0_perfcntr2_64(val)    __write_64bit_gc0_register($25, 5, val)
-#define read_gc0_perfctrl3()           __read_32bit_gc0_register($25, 6)
-#define write_gc0_perfctrl3(val)       __write_32bit_gc0_register($25, 6, val)
-#define read_gc0_perfcntr3()           __read_32bit_gc0_register($25, 7)
-#define write_gc0_perfcntr3(val)       __write_32bit_gc0_register($25, 7, val)
-#define read_gc0_perfcntr3_64()                __read_64bit_gc0_register($25, 7)
-#define write_gc0_perfcntr3_64(val)    __write_64bit_gc0_register($25, 7, val)
-
-#define read_gc0_errorepc()            __read_ulong_gc0_register($30, 0)
-#define write_gc0_errorepc(val)                __write_ulong_gc0_register($30, 0, val)
-
-#define read_gc0_kscratch1()           __read_ulong_gc0_register($31, 2)
-#define read_gc0_kscratch2()           __read_ulong_gc0_register($31, 3)
-#define read_gc0_kscratch3()           __read_ulong_gc0_register($31, 4)
-#define read_gc0_kscratch4()           __read_ulong_gc0_register($31, 5)
-#define read_gc0_kscratch5()           __read_ulong_gc0_register($31, 6)
-#define read_gc0_kscratch6()           __read_ulong_gc0_register($31, 7)
-#define write_gc0_kscratch1(val)       __write_ulong_gc0_register($31, 2, val)
-#define write_gc0_kscratch2(val)       __write_ulong_gc0_register($31, 3, val)
-#define write_gc0_kscratch3(val)       __write_ulong_gc0_register($31, 4, val)
-#define write_gc0_kscratch4(val)       __write_ulong_gc0_register($31, 5, val)
-#define write_gc0_kscratch5(val)       __write_ulong_gc0_register($31, 6, val)
-#define write_gc0_kscratch6(val)       __write_ulong_gc0_register($31, 7, val)
+#define read_gc0_segctl2()             __read_ulong_gc0_register(5, 4)
+#define write_gc0_segctl2(val)         __write_ulong_gc0_register(5, 4, val)
+
+#define read_gc0_pwbase()              __read_ulong_gc0_register(5, 5)
+#define write_gc0_pwbase(val)          __write_ulong_gc0_register(5, 5, val)
+
+#define read_gc0_pwfield()             __read_ulong_gc0_register(5, 6)
+#define write_gc0_pwfield(val)         __write_ulong_gc0_register(5, 6, val)
+
+#define read_gc0_pwsize()              __read_ulong_gc0_register(5, 7)
+#define write_gc0_pwsize(val)          __write_ulong_gc0_register(5, 7, val)
+
+#define read_gc0_wired()               __read_32bit_gc0_register(6, 0)
+#define write_gc0_wired(val)           __write_32bit_gc0_register(6, 0, val)
+
+#define read_gc0_pwctl()               __read_32bit_gc0_register(6, 6)
+#define write_gc0_pwctl(val)           __write_32bit_gc0_register(6, 6, val)
+
+#define read_gc0_hwrena()              __read_32bit_gc0_register(7, 0)
+#define write_gc0_hwrena(val)          __write_32bit_gc0_register(7, 0, val)
+
+#define read_gc0_badvaddr()            __read_ulong_gc0_register(8, 0)
+#define write_gc0_badvaddr(val)                __write_ulong_gc0_register(8, 0, val)
+
+#define read_gc0_badinstr()            __read_32bit_gc0_register(8, 1)
+#define write_gc0_badinstr(val)                __write_32bit_gc0_register(8, 1, val)
+
+#define read_gc0_badinstrp()           __read_32bit_gc0_register(8, 2)
+#define write_gc0_badinstrp(val)       __write_32bit_gc0_register(8, 2, val)
+
+#define read_gc0_count()               __read_32bit_gc0_register(9, 0)
+
+#define read_gc0_entryhi()             __read_ulong_gc0_register(10, 0)
+#define write_gc0_entryhi(val)         __write_ulong_gc0_register(10, 0, val)
+
+#define read_gc0_compare()             __read_32bit_gc0_register(11, 0)
+#define write_gc0_compare(val)         __write_32bit_gc0_register(11, 0, val)
+
+#define read_gc0_status()              __read_32bit_gc0_register(12, 0)
+#define write_gc0_status(val)          __write_32bit_gc0_register(12, 0, val)
+
+#define read_gc0_intctl()              __read_32bit_gc0_register(12, 1)
+#define write_gc0_intctl(val)          __write_32bit_gc0_register(12, 1, val)
+
+#define read_gc0_cause()               __read_32bit_gc0_register(13, 0)
+#define write_gc0_cause(val)           __write_32bit_gc0_register(13, 0, val)
+
+#define read_gc0_epc()                 __read_ulong_gc0_register(14, 0)
+#define write_gc0_epc(val)             __write_ulong_gc0_register(14, 0, val)
+
+#define read_gc0_ebase()               __read_32bit_gc0_register(15, 1)
+#define write_gc0_ebase(val)           __write_32bit_gc0_register(15, 1, val)
+
+#define read_gc0_ebase_64()            __read_64bit_gc0_register(15, 1)
+#define write_gc0_ebase_64(val)                __write_64bit_gc0_register(15, 1, val)
+
+#define read_gc0_config()              __read_32bit_gc0_register(16, 0)
+#define read_gc0_config1()             __read_32bit_gc0_register(16, 1)
+#define read_gc0_config2()             __read_32bit_gc0_register(16, 2)
+#define read_gc0_config3()             __read_32bit_gc0_register(16, 3)
+#define read_gc0_config4()             __read_32bit_gc0_register(16, 4)
+#define read_gc0_config5()             __read_32bit_gc0_register(16, 5)
+#define read_gc0_config6()             __read_32bit_gc0_register(16, 6)
+#define read_gc0_config7()             __read_32bit_gc0_register(16, 7)
+#define write_gc0_config(val)          __write_32bit_gc0_register(16, 0, val)
+#define write_gc0_config1(val)         __write_32bit_gc0_register(16, 1, val)
+#define write_gc0_config2(val)         __write_32bit_gc0_register(16, 2, val)
+#define write_gc0_config3(val)         __write_32bit_gc0_register(16, 3, val)
+#define write_gc0_config4(val)         __write_32bit_gc0_register(16, 4, val)
+#define write_gc0_config5(val)         __write_32bit_gc0_register(16, 5, val)
+#define write_gc0_config6(val)         __write_32bit_gc0_register(16, 6, val)
+#define write_gc0_config7(val)         __write_32bit_gc0_register(16, 7, val)
+
+#define read_gc0_watchlo0()            __read_ulong_gc0_register(18, 0)
+#define read_gc0_watchlo1()            __read_ulong_gc0_register(18, 1)
+#define read_gc0_watchlo2()            __read_ulong_gc0_register(18, 2)
+#define read_gc0_watchlo3()            __read_ulong_gc0_register(18, 3)
+#define read_gc0_watchlo4()            __read_ulong_gc0_register(18, 4)
+#define read_gc0_watchlo5()            __read_ulong_gc0_register(18, 5)
+#define read_gc0_watchlo6()            __read_ulong_gc0_register(18, 6)
+#define read_gc0_watchlo7()            __read_ulong_gc0_register(18, 7)
+#define write_gc0_watchlo0(val)                __write_ulong_gc0_register(18, 0, val)
+#define write_gc0_watchlo1(val)                __write_ulong_gc0_register(18, 1, val)
+#define write_gc0_watchlo2(val)                __write_ulong_gc0_register(18, 2, val)
+#define write_gc0_watchlo3(val)                __write_ulong_gc0_register(18, 3, val)
+#define write_gc0_watchlo4(val)                __write_ulong_gc0_register(18, 4, val)
+#define write_gc0_watchlo5(val)                __write_ulong_gc0_register(18, 5, val)
+#define write_gc0_watchlo6(val)                __write_ulong_gc0_register(18, 6, val)
+#define write_gc0_watchlo7(val)                __write_ulong_gc0_register(18, 7, val)
+
+#define read_gc0_watchhi0()            __read_32bit_gc0_register(19, 0)
+#define read_gc0_watchhi1()            __read_32bit_gc0_register(19, 1)
+#define read_gc0_watchhi2()            __read_32bit_gc0_register(19, 2)
+#define read_gc0_watchhi3()            __read_32bit_gc0_register(19, 3)
+#define read_gc0_watchhi4()            __read_32bit_gc0_register(19, 4)
+#define read_gc0_watchhi5()            __read_32bit_gc0_register(19, 5)
+#define read_gc0_watchhi6()            __read_32bit_gc0_register(19, 6)
+#define read_gc0_watchhi7()            __read_32bit_gc0_register(19, 7)
+#define write_gc0_watchhi0(val)                __write_32bit_gc0_register(19, 0, val)
+#define write_gc0_watchhi1(val)                __write_32bit_gc0_register(19, 1, val)
+#define write_gc0_watchhi2(val)                __write_32bit_gc0_register(19, 2, val)
+#define write_gc0_watchhi3(val)                __write_32bit_gc0_register(19, 3, val)
+#define write_gc0_watchhi4(val)                __write_32bit_gc0_register(19, 4, val)
+#define write_gc0_watchhi5(val)                __write_32bit_gc0_register(19, 5, val)
+#define write_gc0_watchhi6(val)                __write_32bit_gc0_register(19, 6, val)
+#define write_gc0_watchhi7(val)                __write_32bit_gc0_register(19, 7, val)
+
+#define read_gc0_xcontext()            __read_ulong_gc0_register(20, 0)
+#define write_gc0_xcontext(val)                __write_ulong_gc0_register(20, 0, val)
+
+#define read_gc0_perfctrl0()           __read_32bit_gc0_register(25, 0)
+#define write_gc0_perfctrl0(val)       __write_32bit_gc0_register(25, 0, val)
+#define read_gc0_perfcntr0()           __read_32bit_gc0_register(25, 1)
+#define write_gc0_perfcntr0(val)       __write_32bit_gc0_register(25, 1, val)
+#define read_gc0_perfcntr0_64()                __read_64bit_gc0_register(25, 1)
+#define write_gc0_perfcntr0_64(val)    __write_64bit_gc0_register(25, 1, val)
+#define read_gc0_perfctrl1()           __read_32bit_gc0_register(25, 2)
+#define write_gc0_perfctrl1(val)       __write_32bit_gc0_register(25, 2, val)
+#define read_gc0_perfcntr1()           __read_32bit_gc0_register(25, 3)
+#define write_gc0_perfcntr1(val)       __write_32bit_gc0_register(25, 3, val)
+#define read_gc0_perfcntr1_64()                __read_64bit_gc0_register(25, 3)
+#define write_gc0_perfcntr1_64(val)    __write_64bit_gc0_register(25, 3, val)
+#define read_gc0_perfctrl2()           __read_32bit_gc0_register(25, 4)
+#define write_gc0_perfctrl2(val)       __write_32bit_gc0_register(25, 4, val)
+#define read_gc0_perfcntr2()           __read_32bit_gc0_register(25, 5)
+#define write_gc0_perfcntr2(val)       __write_32bit_gc0_register(25, 5, val)
+#define read_gc0_perfcntr2_64()                __read_64bit_gc0_register(25, 5)
+#define write_gc0_perfcntr2_64(val)    __write_64bit_gc0_register(25, 5, val)
+#define read_gc0_perfctrl3()           __read_32bit_gc0_register(25, 6)
+#define write_gc0_perfctrl3(val)       __write_32bit_gc0_register(25, 6, val)
+#define read_gc0_perfcntr3()           __read_32bit_gc0_register(25, 7)
+#define write_gc0_perfcntr3(val)       __write_32bit_gc0_register(25, 7, val)
+#define read_gc0_perfcntr3_64()                __read_64bit_gc0_register(25, 7)
+#define write_gc0_perfcntr3_64(val)    __write_64bit_gc0_register(25, 7, val)
+
+#define read_gc0_errorepc()            __read_ulong_gc0_register(30, 0)
+#define write_gc0_errorepc(val)                __write_ulong_gc0_register(30, 0, val)
+
+#define read_gc0_kscratch1()           __read_ulong_gc0_register(31, 2)
+#define read_gc0_kscratch2()           __read_ulong_gc0_register(31, 3)
+#define read_gc0_kscratch3()           __read_ulong_gc0_register(31, 4)
+#define read_gc0_kscratch4()           __read_ulong_gc0_register(31, 5)
+#define read_gc0_kscratch5()           __read_ulong_gc0_register(31, 6)
+#define read_gc0_kscratch6()           __read_ulong_gc0_register(31, 7)
+#define write_gc0_kscratch1(val)       __write_ulong_gc0_register(31, 2, val)
+#define write_gc0_kscratch2(val)       __write_ulong_gc0_register(31, 3, val)
+#define write_gc0_kscratch3(val)       __write_ulong_gc0_register(31, 4, val)
+#define write_gc0_kscratch4(val)       __write_ulong_gc0_register(31, 5, val)
+#define write_gc0_kscratch5(val)       __write_ulong_gc0_register(31, 6, val)
+#define write_gc0_kscratch6(val)       __write_ulong_gc0_register(31, 7, val)
 
 /*
  * Macros to access the floating point coprocessor control registers
@@ -2421,6 +2485,8 @@ static inline void tlb_write_random(void)
                ".set reorder");
 }
 
+#ifdef TOOLCHAIN_SUPPORTS_VIRT
+
 /*
  * Guest TLB operations.
  *
@@ -2479,6 +2545,53 @@ static inline void guest_tlbinvf(void)
                ".set pop");
 }
 
+#else  /* TOOLCHAIN_SUPPORTS_VIRT */
+
+/*
+ * Guest TLB operations.
+ *
+ * It is responsibility of the caller to take care of any TLB hazards.
+ */
+static inline void guest_tlb_probe(void)
+{
+       __asm__ __volatile__(
+               "# tlbgp\n\t"
+               ".word 0x42000010");
+}
+
+static inline void guest_tlb_read(void)
+{
+       __asm__ __volatile__(
+               "# tlbgr\n\t"
+               ".word 0x42000009");
+}
+
+static inline void guest_tlb_write_indexed(void)
+{
+       __asm__ __volatile__(
+               "# tlbgwi\n\t"
+               ".word 0x4200000a");
+}
+
+static inline void guest_tlb_write_random(void)
+{
+       __asm__ __volatile__(
+               "# tlbgwr\n\t"
+               ".word 0x4200000e");
+}
+
+/*
+ * Guest TLB Invalidate Flush
+ */
+static inline void guest_tlbinvf(void)
+{
+       __asm__ __volatile__(
+               "# tlbginvf\n\t"
+               ".word 0x4200000c");
+}
+
+#endif /* !TOOLCHAIN_SUPPORTS_VIRT */
+
 /*
  * Manipulate bits in a register.
  */