diff options
Diffstat (limited to 'sys/arm64/include/pte.h')
| -rw-r--r-- | sys/arm64/include/pte.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/sys/arm64/include/pte.h b/sys/arm64/include/pte.h new file mode 100644 index 000000000000..72d0e62e7109 --- /dev/null +++ b/sys/arm64/include/pte.h @@ -0,0 +1,118 @@ +/*- + * Copyright (c) 2014 Andrew Turner + * Copyright (c) 2014-2015 The FreeBSD Foundation + * All rights reserved. + * + * This software was developed by Andrew Turner under + * sponsorship from the FreeBSD Foundation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _MACHINE_PTE_H_ +#define _MACHINE_PTE_H_ + +#ifndef LOCORE +typedef uint64_t pd_entry_t; /* page directory entry */ +typedef uint64_t pt_entry_t; /* page table entry */ +#endif + +/* Block and Page attributes */ +/* TODO: Add the upper attributes */ +#define ATTR_MASK_H UINT64_C(0xfff0000000000000) +#define ATTR_MASK_L UINT64_C(0x0000000000000fff) +#define ATTR_MASK (ATTR_MASK_H | ATTR_MASK_L) +/* Bits 58:55 are reserved for software */ +#define ATTR_SW_MANAGED (1UL << 56) +#define ATTR_SW_WIRED (1UL << 55) +#define ATTR_nG (1 << 11) +#define ATTR_AF (1 << 10) +#define ATTR_SH(x) ((x) << 8) +#define ATTR_SH_MASK ATTR_SH(3) +#define ATTR_SH_NS 0 /* Non-shareable */ +#define ATTR_SH_OS 2 /* Outer-shareable */ +#define ATTR_SH_IS 3 /* Inner-shareable */ +#define ATTR_AP_RW_BIT (1 << 7) +#define ATTR_AP(x) ((x) << 6) +#define ATTR_AP_MASK ATTR_AP(3) +#define ATTR_AP_RW (0 << 1) +#define ATTR_AP_RO (1 << 1) +#define ATTR_AP_USER (1 << 0) +#define ATTR_NS (1 << 5) +#define ATTR_IDX(x) ((x) << 2) +#define ATTR_IDX_MASK (7 << 2) + +#define ATTR_DEFAULT (ATTR_AF | ATTR_SH(ATTR_SH_IS)) + +#define ATTR_DESCR_MASK 3 + +/* Level 0 table, 512GiB per entry */ +#define L0_SHIFT 39 +#define L0_SIZE (1ul << L0_SHIFT) +#define L0_OFFSET (L0_SIZE - 1ul) +#define L0_INVAL 0x0 /* An invalid address */ + /* 0x1 Level 0 doesn't support block translation */ + /* 0x2 also marks an invalid address */ +#define L0_TABLE 0x3 /* A next-level table */ + +/* Level 1 table, 1GiB per entry */ +#define L1_SHIFT 30 +#define L1_SIZE (1 << L1_SHIFT) +#define L1_OFFSET (L1_SIZE - 1) +#define L1_INVAL L0_INVAL +#define L1_BLOCK 0x1 +#define L1_TABLE L0_TABLE + +/* Level 2 table, 2MiB per entry */ +#define L2_SHIFT 21 +#define L2_SIZE (1 << L2_SHIFT) +#define L2_OFFSET (L2_SIZE - 1) +#define L2_INVAL L1_INVAL +#define L2_BLOCK L1_BLOCK +#define L2_TABLE L1_TABLE + +#define L2_BLOCK_MASK UINT64_C(0xffffffe00000) + +/* Level 3 table, 4KiB per entry */ +#define L3_SHIFT 12 +#define L3_SIZE (1 << L3_SHIFT) +#define L3_OFFSET (L3_SIZE - 1) +#define L3_SHIFT 12 +#define L3_INVAL 0x0 + /* 0x1 is reserved */ + /* 0x2 also marks an invalid address */ +#define L3_PAGE 0x3 + +#define L0_ENTRIES_SHIFT 9 +#define L0_ENTRIES (1 << L0_ENTRIES_SHIFT) +#define L0_ADDR_MASK (L0_ENTRIES - 1) + +#define Ln_ENTRIES_SHIFT 9 +#define Ln_ENTRIES (1 << Ln_ENTRIES_SHIFT) +#define Ln_ADDR_MASK (Ln_ENTRIES - 1) +#define Ln_TABLE_MASK ((1 << 12) - 1) + +#endif /* !_MACHINE_PTE_H_ */ + +/* End of pte.h */ |