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author | Michiel Van Tol <michiel.vantol@arm.com> | 2019-07-22 16:51:48 +0100 |
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committer | Giacomo Travaglini <giacomo.travaglini@arm.com> | 2019-07-25 12:49:12 +0000 |
commit | 3ed50acb1ebc7a301196ee877253f6d11efb4164 (patch) | |
tree | 75a50bd21b03a94e8cdfafbef29df17b80b7eb7f /src/dev/arm/smmu_v3_ptops.cc | |
parent | 6f45523ed7305f290e0cc1cc475df13c8ab22b3e (diff) | |
download | gem5-3ed50acb1ebc7a301196ee877253f6d11efb4164.tar.xz |
dev-arm: Add 16K granule support to SMMUv3 model
Added the necessary PageTableOps that match the 16K granule
translation regime.
Change-Id: I46ef07939cb4bdc8c0bbbeeeb6a50a9ab0d64de0
Reviewed-by: Michiel Van Tol <michiel.vantol@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/19628
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Diffstat (limited to 'src/dev/arm/smmu_v3_ptops.cc')
-rw-r--r-- | src/dev/arm/smmu_v3_ptops.cc | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/src/dev/arm/smmu_v3_ptops.cc b/src/dev/arm/smmu_v3_ptops.cc index 6490b34c7..c57c16a3a 100644 --- a/src/dev/arm/smmu_v3_ptops.cc +++ b/src/dev/arm/smmu_v3_ptops.cc @@ -228,6 +228,102 @@ V8PageTableOps4k::lastLevel() const } bool +V8PageTableOps16k::isValid(pte_t pte, unsigned level) const +{ + switch (level) { + case 0: return pte & 0x1; + case 1: return pte & 0x1; + case 2: return pte & 0x1; + case 3: return (pte & 0x1) && (pte & 0x2); + default: panic("bad level %d", level); + } +} + +bool +V8PageTableOps16k::isLeaf(pte_t pte, unsigned level) const +{ + switch (level) { + case 0: return false; + case 1: return false; + case 2: return !(pte & 0x2); + case 3: return true; + default: panic("bad level %d", level); + } +} + +bool +V8PageTableOps16k::isWritable(pte_t pte, unsigned level, bool stage2) const +{ + return stage2 ? bits(pte, 7, 6) == 3 : bits(pte, 7) == 0; +} + +Addr +V8PageTableOps16k::nextLevelPointer(pte_t pte, unsigned level) const +{ + if (isLeaf(pte, level)) { + switch (level) { + // no level 0 here + case 1: return mbits(pte, 47, 36); + case 2: return mbits(pte, 47, 25); + case 3: return mbits(pte, 47, 14); + default: panic("bad level %d", level); + } + } else { + return mbits(pte, 47, 12); + } +} + +Addr +V8PageTableOps16k::index(Addr va, unsigned level) const +{ + switch (level) { + case 0: return bits(va, 47, 47) << 3; break; + case 1: return bits(va, 46, 36) << 3; break; + case 2: return bits(va, 35, 25) << 3; break; + case 3: return bits(va, 24, 14) << 3; break; + default: panic("bad level %d", level); + } +} + +Addr +V8PageTableOps16k::pageMask(pte_t pte, unsigned level) const +{ + switch (level) { + // no level 0 here + case 1: return ~mask(36); + // 16K granule supports contiguous entries also at L2; - 1G + case 2: return bits(pte, 52) ? ~mask(30) : ~mask(25); + // as well as at L3; - 2M + case 3: return bits(pte, 52) ? ~mask(21) : ~mask(14); + default: panic("bad level %d", level); + } +} + +Addr +V8PageTableOps16k::walkMask(unsigned level) const +{ + switch (level) { + case 0: return ~mask(47); + case 1: return ~mask(36); + case 2: return ~mask(25); + case 3: return ~mask(14); + default: panic("bad level %d", level); + } +} + +unsigned +V8PageTableOps16k::firstLevel() const +{ + return 0; +} + +unsigned +V8PageTableOps16k::lastLevel() const +{ + return 3; +} + +bool V8PageTableOps64k::isValid(pte_t pte, unsigned level) const { switch (level) { |