diff options
| author | Edgar E. Iglesias <edgar.iglesias@xilinx.com> | 2015-10-26 14:01:57 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2015-10-27 15:59:46 +0000 |
| commit | 4ee38098010240e0b390061fdd0151ff62d80279 (patch) | |
| tree | c8f1daa4517e6bae97715a4749be1689d0a9d502 /target-arm/helper.c | |
| parent | 1f4c8c18a5b6f4fad13e13b7e3828124c6c8f34d (diff) | |
target-arm: Add support for AArch32 S2 negative t0sz
Add support for AArch32 S2 negative t0sz. In preparation for
using 40bit IPAs on AArch32.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1445864527-14520-5-git-send-email-edgar.iglesias@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target-arm/helper.c')
| -rw-r--r-- | target-arm/helper.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index 0086febf43..d2f035f984 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -6536,10 +6536,26 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address, * This is a Non-secure PL0/1 stage 1 translation, so controlled by * TTBCR/TTBR0/TTBR1 in accordance with ARM ARM DDI0406C table B-32: */ - t0sz = extract32(tcr->raw_tcr, 0, 6); if (va_size == 64) { + /* AArch64 translation. */ + t0sz = extract32(tcr->raw_tcr, 0, 6); t0sz = MIN(t0sz, 39); t0sz = MAX(t0sz, 16); + } else if (mmu_idx != ARMMMUIdx_S2NS) { + /* AArch32 stage 1 translation. */ + t0sz = extract32(tcr->raw_tcr, 0, 3); + } else { + /* AArch32 stage 2 translation. */ + bool sext = extract32(tcr->raw_tcr, 4, 1); + bool sign = extract32(tcr->raw_tcr, 3, 1); + t0sz = sextract32(tcr->raw_tcr, 0, 4); + + /* If the sign-extend bit is not the same as t0sz[3], the result + * is unpredictable. Flag this as a guest error. */ + if (sign != sext) { + qemu_log_mask(LOG_GUEST_ERROR, + "AArch32: VTCR.S / VTCR.T0SZ[3] missmatch\n"); + } } t1sz = extract32(tcr->raw_tcr, 16, 6); if (va_size == 64) { |