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authorJames Hogan <james.hogan@imgtec.com>2016-05-20 23:28:38 +0100
committerRalf Baechle <ralf@linux-mips.org>2016-05-28 12:35:10 +0200
commit1c48a177351ba8cbf6871f035496fce0e11d8fa3 (patch)
treef4598c46e110730ebcd864bab6622e222fa3b2e2
parent0dfa1c12f300d06f95d861d2718ef198e37473a6 (diff)
downloadlinux-stericsson-1c48a177351ba8cbf6871f035496fce0e11d8fa3.tar.gz
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.h27
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 */