100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/*
|
|
* ARM SMMU support - Internal API
|
|
*
|
|
* Copyright (c) 2017 Red Hat, Inc.
|
|
* Copyright (C) 2014-2016 Broadcom Corporation
|
|
* Written by Prem Mallappa, Eric Auger
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef HW_ARM_SMMU_INTERNAL_H
|
|
#define HW_ARM_SMMU_INTERNAL_H
|
|
|
|
#define TBI0(tbi) ((tbi) & 0x1)
|
|
#define TBI1(tbi) ((tbi) & 0x2 >> 1)
|
|
|
|
/* PTE Manipulation */
|
|
|
|
#define ARM_LPAE_PTE_TYPE_SHIFT 0
|
|
#define ARM_LPAE_PTE_TYPE_MASK 0x3
|
|
|
|
#define ARM_LPAE_PTE_TYPE_BLOCK 1
|
|
#define ARM_LPAE_PTE_TYPE_TABLE 3
|
|
|
|
#define ARM_LPAE_L3_PTE_TYPE_RESERVED 1
|
|
#define ARM_LPAE_L3_PTE_TYPE_PAGE 3
|
|
|
|
#define ARM_LPAE_PTE_VALID (1 << 0)
|
|
|
|
#define PTE_ADDRESS(pte, shift) \
|
|
(extract64(pte, shift, 47 - shift + 1) << shift)
|
|
|
|
#define is_invalid_pte(pte) (!(pte & ARM_LPAE_PTE_VALID))
|
|
|
|
#define is_reserved_pte(pte, level) \
|
|
((level == 3) && \
|
|
((pte & ARM_LPAE_PTE_TYPE_MASK) == ARM_LPAE_L3_PTE_TYPE_RESERVED))
|
|
|
|
#define is_block_pte(pte, level) \
|
|
((level < 3) && \
|
|
((pte & ARM_LPAE_PTE_TYPE_MASK) == ARM_LPAE_PTE_TYPE_BLOCK))
|
|
|
|
#define is_table_pte(pte, level) \
|
|
((level < 3) && \
|
|
((pte & ARM_LPAE_PTE_TYPE_MASK) == ARM_LPAE_PTE_TYPE_TABLE))
|
|
|
|
#define is_page_pte(pte, level) \
|
|
((level == 3) && \
|
|
((pte & ARM_LPAE_PTE_TYPE_MASK) == ARM_LPAE_L3_PTE_TYPE_PAGE))
|
|
|
|
/* access permissions */
|
|
|
|
#define PTE_AP(pte) \
|
|
(extract64(pte, 6, 2))
|
|
|
|
#define PTE_APTABLE(pte) \
|
|
(extract64(pte, 61, 2))
|
|
|
|
/*
|
|
* TODO: At the moment all transactions are considered as privileged (EL1)
|
|
* as IOMMU translation callback does not pass user/priv attributes.
|
|
*/
|
|
#define is_permission_fault(ap, perm) \
|
|
(((perm) & IOMMU_WO) && ((ap) & 0x2))
|
|
|
|
#define PTE_AP_TO_PERM(ap) \
|
|
(IOMMU_ACCESS_FLAG(true, !((ap) & 0x2)))
|
|
|
|
/* Level Indexing */
|
|
|
|
static inline int level_shift(int level, int granule_sz)
|
|
{
|
|
return granule_sz + (3 - level) * (granule_sz - 3);
|
|
}
|
|
|
|
static inline uint64_t level_page_mask(int level, int granule_sz)
|
|
{
|
|
return ~(MAKE_64BIT_MASK(0, level_shift(level, granule_sz)));
|
|
}
|
|
|
|
static inline
|
|
uint64_t iova_level_offset(uint64_t iova, int inputsize,
|
|
int level, int gsz)
|
|
{
|
|
return ((iova & MAKE_64BIT_MASK(0, inputsize)) >> level_shift(level, gsz)) &
|
|
MAKE_64BIT_MASK(0, gsz - 3);
|
|
}
|
|
|
|
#endif
|