diff options
| author | James Hogan <james.hogan@imgtec.com> | 2016-05-21 00:28:38 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-05-28 12:35:10 +0200 |
| commit | 1c48a177351ba8cbf6871f035496fce0e11d8fa3 (patch) | |
| tree | f4598c46e110730ebcd864bab6622e222fa3b2e2 | |
| parent | MIPS: Add inline asm encoding helpers (diff) | |
| download | linux-1c48a177351ba8cbf6871f035496fce0e11d8fa3.tar.xz linux-1c48a177351ba8cbf6871f035496fce0e11d8fa3.zip | |
MIPS: Add missing VZ accessor microMIPS encodings
Toolchains may be used which support microMIPS but not VZ instructions
(i.e. binutis 2.22 & 2.23), so extend the explicitly encoded versions of
the guest COP0 register & guest TLB access macros to support microMIPS
encodings too, using the new macros.
This prevents non-microMIPS instructions being executed in microMIPS
mode during CPU probe on cores supporting VZ (e.g. M5150), which cause
reserved instruction exceptions early during boot.
Fixes: bad50d79255a ("MIPS: Fix VZ probe gas errors with binutils <2.24")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13311/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/include/asm/mipsregs.h | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h index 1ce2c72ab88d..98b289af6245 100644 --- a/arch/mips/include/asm/mipsregs.h +++ b/arch/mips/include/asm/mipsregs.h @@ -1773,7 +1773,8 @@ do { \ ".set\tpush\n\t" \ ".set\tnoat\n\t" \ "# mfgc0\t$1, $%1, %2\n\t" \ - ".word\t(0x40610000 | %1 << 11 | %2)\n\t" \ + _ASM_INSN_IF_MIPS(0x40610000 | %1 << 11 | %2) \ + _ASM_INSN32_IF_MM(0x002004fc | %1 << 16 | %2 << 11) \ "move\t%0, $1\n\t" \ ".set\tpop" \ : "=r" (__res) \ @@ -1787,7 +1788,8 @@ do { \ ".set\tpush\n\t" \ ".set\tnoat\n\t" \ "# dmfgc0\t$1, $%1, %2\n\t" \ - ".word\t(0x40610100 | %1 << 11 | %2)\n\t" \ + _ASM_INSN_IF_MIPS(0x40610100 | %1 << 11 | %2) \ + _ASM_INSN32_IF_MM(0x582004fc | %1 << 16 | %2 << 11) \ "move\t%0, $1\n\t" \ ".set\tpop" \ : "=r" (__res) \ @@ -1802,7 +1804,8 @@ do { \ ".set\tnoat\n\t" \ "move\t$1, %z0\n\t" \ "# mtgc0\t$1, $%1, %2\n\t" \ - ".word\t(0x40610200 | %1 << 11 | %2)\n\t" \ + _ASM_INSN_IF_MIPS(0x40610200 | %1 << 11 | %2) \ + _ASM_INSN32_IF_MM(0x002006fc | %1 << 16 | %2 << 11) \ ".set\tpop" \ : : "Jr" ((unsigned int)(value)), \ "i" (register), "i" (sel)); \ @@ -1815,7 +1818,8 @@ do { \ ".set\tnoat\n\t" \ "move\t$1, %z0\n\t" \ "# dmtgc0\t$1, $%1, %2\n\t" \ - ".word\t(0x40610300 | %1 << 11 | %2)\n\t" \ + _ASM_INSN_IF_MIPS(0x40610300 | %1 << 11 | %2) \ + _ASM_INSN32_IF_MM(0x582006fc | %1 << 16 | %2 << 11) \ ".set\tpop" \ : : "Jr" (value), \ "i" (register), "i" (sel)); \ @@ -2586,28 +2590,32 @@ static inline void guest_tlb_probe(void) { __asm__ __volatile__( "# tlbgp\n\t" - ".word 0x42000010"); + _ASM_INSN_IF_MIPS(0x42000010) + _ASM_INSN32_IF_MM(0x0000017c)); } static inline void guest_tlb_read(void) { __asm__ __volatile__( "# tlbgr\n\t" - ".word 0x42000009"); + _ASM_INSN_IF_MIPS(0x42000009) + _ASM_INSN32_IF_MM(0x0000117c)); } static inline void guest_tlb_write_indexed(void) { __asm__ __volatile__( "# tlbgwi\n\t" - ".word 0x4200000a"); + _ASM_INSN_IF_MIPS(0x4200000a) + _ASM_INSN32_IF_MM(0x0000217c)); } static inline void guest_tlb_write_random(void) { __asm__ __volatile__( "# tlbgwr\n\t" - ".word 0x4200000e"); + _ASM_INSN_IF_MIPS(0x4200000e) + _ASM_INSN32_IF_MM(0x0000317c)); } /* @@ -2617,7 +2625,8 @@ static inline void guest_tlbinvf(void) { __asm__ __volatile__( "# tlbginvf\n\t" - ".word 0x4200000c"); + _ASM_INSN_IF_MIPS(0x4200000c) + _ASM_INSN32_IF_MM(0x0000517c)); } #endif /* !TOOLCHAIN_SUPPORTS_VIRT */ |