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target/mips: Implement hardware page table walker for MIPS32

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Implement hardware page table walker. This implementation is
limiter only to MIPS32.

Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
This commit is contained in:
Yongbok Kim 2018-10-09 18:54:46 +02:00 • committed by Aleksandar Markovic
parent 6301079557
commit 074cfcb4da
3 changed files with 370 additions and 3 deletions
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7
target/mips/op_helper.c
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@ -1400,7 +1400,7 @@ void helper_mtc0_context(CPUMIPSState *env, target_ulong arg1)
env->CP0_Context = (env->CP0_Context & 0x007FFFFF) | (arg1 & ~0x007FFFFF);
}
void helper_mtc0_pagemask(CPUMIPSState *env, target_ulong arg1)
void update_pagemask(CPUMIPSState *env, target_ulong arg1, int32_t *pagemask)
{
uint64_t mask = arg1 >> (TARGET_PAGE_BITS + 1);
if (!(env->insn_flags & ISA_MIPS32R6) || (arg1 == ~0) ||
@ -1411,6 +1411,11 @@ void helper_mtc0_pagemask(CPUMIPSState *env, target_ulong arg1)
}
}
void helper_mtc0_pagemask(CPUMIPSState *env, target_ulong arg1)
{
update_pagemask(env, arg1, &env->CP0_PageMask);
}
void helper_mtc0_pagegrain(CPUMIPSState *env, target_ulong arg1)
{
/* SmartMIPS not implemented */