From 968a40f6fac887846d1316e737619233978a0cee Mon Sep 17 00:00:00 2001 From: "Edgar E. Iglesias" Date: Thu, 3 Sep 2009 12:59:46 +0200 Subject: microblaze: Trap on unaligned data accesses. Untested... Signed-off-by: Edgar E. Iglesias --- target-microblaze/op_helper.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'target-microblaze/op_helper.c') diff --git a/target-microblaze/op_helper.c b/target-microblaze/op_helper.c index 134d243..a5b3827 100644 --- a/target-microblaze/op_helper.c +++ b/target-microblaze/op_helper.c @@ -206,6 +206,33 @@ uint32_t helper_pcmpbf(uint32_t a, uint32_t b) return 0; } +void helper_memalign(uint32_t addr, uint32_t dr, uint32_t wr, uint32_t size) +{ + uint32_t mask; + + switch (size) { + case 4: mask = 3; break; + case 2: mask = 1; break; + default: + case 1: mask = 0; break; + } + + if (addr & mask) { + qemu_log("unaligned access addr=%x size=%d, wr=%d\n", + addr, size, wr); + if (!(env->sregs[SR_MSR] & MSR_EE)) { + return; + } + + env->sregs[SR_ESR] = ESR_EC_UNALIGNED_DATA | (wr << 10) \ + | (dr & 31) << 5; + if (size == 4) { + env->sregs[SR_ESR] |= 1 << 11; + } + helper_raise_exception(EXCP_HW_EXCP); + } +} + #if !defined(CONFIG_USER_ONLY) /* Writes/reads to the MMU's special regs end up here. */ uint32_t helper_mmu_read(uint32_t rn) -- cgit v1.1