a7c24c425b
Extend the Book-E pmap to support 64-bit operation. Much of this was taken from Juniper's Junos FreeBSD port. It uses a 3-level page table (page directory list -- PP2D, page directory, page table), but has gaps in the page directory list where regions will repeat, due to the design of the PP2D hash (a 20-bit gap between the two parts of the index). In practice this may not be a problem given the expanded address space. However, an alternative to this would be to use a 4-level page table, like Linux, and possibly reduce the available address space; Linux appears to use a 46-bit address space. Alternatively, a cache of page directory pointers could be used to keep the overall design as-is, but remove the gaps in the address space. This includes a new kernel config for 64-bit QorIQ SoCs, based on MPC85XX, with the following notes: * The DPAA driver has not yet been ported to 64-bit so is not included in the kernel config. * This has been tested on the AmigaOne X5000, using a MD_ROOT compiled in (total size kernel+mdroot must be under 64MB). * This can run both 32-bit and 64-bit processes, and has even been tested to run a 32-bit init with 64-bit children. Many thanks to stevek and marcel for getting Juniper's FreeBSD patches open sourced to be used here, and to stevek for reviewing, and providing some historical contexts on quirks of the code. Reviewed by: stevek Obtained from: Juniper (in part) MFC after: 2 months Relnotes: yes Differential Revision: https://reviews.freebsd.org/D9433
236 lines
6.8 KiB
C
236 lines
6.8 KiB
C
/*-
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* Copyright (C) 2006-2012 Semihalf.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_TLB_H_
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#define _MACHINE_TLB_H_
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#if defined(BOOKE_E500)
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/* PowerPC E500 MAS registers */
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#define MAS0_TLBSEL(x) ((x << 28) & 0x10000000)
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#define MAS0_ESEL(x) ((x << 16) & 0x003F0000)
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#define MAS0_TLBSEL1 0x10000000
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#define MAS0_TLBSEL0 0x00000000
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#define MAS0_ESEL_TLB1MASK 0x000F0000
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#define MAS0_ESEL_TLB0MASK 0x00030000
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#define MAS0_ESEL_SHIFT 16
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#define MAS0_NV_MASK 0x00000003
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#define MAS0_NV_SHIFT 0
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#define MAS1_VALID 0x80000000
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#define MAS1_IPROT 0x40000000
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#define MAS1_TID_MASK 0x00FF0000
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#define MAS1_TID_SHIFT 16
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#define MAS1_TS_MASK 0x00001000
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#define MAS1_TS_SHIFT 12
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#define MAS1_TSIZE_MASK 0x00000F00
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#define MAS1_TSIZE_SHIFT 8
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#define TLB_SIZE_4K 1
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#define TLB_SIZE_16K 2
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#define TLB_SIZE_64K 3
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#define TLB_SIZE_256K 4
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#define TLB_SIZE_1M 5
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#define TLB_SIZE_4M 6
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#define TLB_SIZE_16M 7
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#define TLB_SIZE_64M 8
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#define TLB_SIZE_256M 9
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#define TLB_SIZE_1G 10
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#define TLB_SIZE_4G 11
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#ifdef __powerpc64__
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#define MAS2_EPN_MASK 0xFFFFFFFFFFFFF000UL
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#else
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#define MAS2_EPN_MASK 0xFFFFF000
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#endif
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#define MAS2_EPN_SHIFT 12
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#define MAS2_X0 0x00000040
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#define MAS2_X1 0x00000020
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#define MAS2_W 0x00000010
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#define MAS2_I 0x00000008
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#define MAS2_M 0x00000004
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#define MAS2_G 0x00000002
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#define MAS2_E 0x00000001
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#define MAS2_WIMGE_MASK 0x0000007F
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#define MAS3_RPN 0xFFFFF000
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#define MAS3_RPN_SHIFT 12
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#define MAS3_U0 0x00000200
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#define MAS3_U1 0x00000100
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#define MAS3_U2 0x00000080
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#define MAS3_U3 0x00000040
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#define MAS3_UX 0x00000020
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#define MAS3_SX 0x00000010
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#define MAS3_UW 0x00000008
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#define MAS3_SW 0x00000004
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#define MAS3_UR 0x00000002
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#define MAS3_SR 0x00000001
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#define MAS4_TLBSELD1 0x10000000
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#define MAS4_TLBSELD0 0x00000000
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#define MAS4_TIDSELD_MASK 0x00030000
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#define MAS4_TIDSELD_SHIFT 16
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#define MAS4_TSIZED_MASK 0x00000F00
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#define MAS4_TSIZED_SHIFT 8
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#define MAS4_X0D 0x00000040
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#define MAS4_X1D 0x00000020
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#define MAS4_WD 0x00000010
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#define MAS4_ID 0x00000008
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#define MAS4_MD 0x00000004
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#define MAS4_GD 0x00000002
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#define MAS4_ED 0x00000001
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#define MAS6_SPID0_MASK 0x00FF0000
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#define MAS6_SPID0_SHIFT 16
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#define MAS6_SAS 0x00000001
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#define MAS7_RPN 0x0000000F
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#define MAS1_GETTID(mas1) (((mas1) & MAS1_TID_MASK) >> MAS1_TID_SHIFT)
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#define MAS2_TLB0_ENTRY_IDX_MASK 0x0007f000
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#define MAS2_TLB0_ENTRY_IDX_SHIFT 12
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/*
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* Maximum number of TLB1 entries used for a permanent mapping of kernel
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* region (kernel image plus statically allocated data).
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*/
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#define KERNEL_REGION_MAX_TLB_ENTRIES 4
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/*
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* Use MAS2_X0 to mark entries which will be copied
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* to AP CPUs during SMP bootstrap. As result entries
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* marked with _TLB_ENTRY_SHARED will be shared by all CPUs.
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*/
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#define _TLB_ENTRY_SHARED (MAS2_X0) /* XXX under SMP? */
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#define _TLB_ENTRY_IO (MAS2_I | MAS2_G)
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#define _TLB_ENTRY_MEM (MAS2_M)
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#define TLB1_MAX_ENTRIES 64
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#if !defined(LOCORE)
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typedef struct tlb_entry {
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vm_paddr_t phys;
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vm_offset_t virt;
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vm_size_t size;
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uint32_t mas1;
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#ifdef __powerpc64__
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uint64_t mas2;
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#else
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uint32_t mas2;
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#endif
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uint32_t mas3;
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uint32_t mas7;
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} tlb_entry_t;
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void tlb0_print_tlbentries(void);
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void tlb1_inval_entry(unsigned int);
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void tlb1_init(void);
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void tlb1_print_entries(void);
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void tlb1_print_tlbentries(void);
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#endif /* !LOCORE */
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#elif defined(BOOKE_PPC4XX)
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/* TLB Words */
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#define TLB_PAGEID 0
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#define TLB_XLAT 1
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#define TLB_ATTRIB 2
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/* Page identification fields */
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#define TLB_EPN_MASK (0xFFFFFC00 >> 0)
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#define TLB_VALID (0x80000000 >> 22)
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#define TLB_TS (0x80000000 >> 23)
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#define TLB_SIZE_1K (0x00000000 >> 24)
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#define TLB_SIZE_MASK (0xF0000000 >> 24)
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/* Translation fields */
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#define TLB_RPN_MASK (0xFFFFFC00 >> 0)
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#define TLB_ERPN_MASK (0xF0000000 >> 28)
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/* Storage attribute and access control fields */
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#define TLB_WL1 (0x80000000 >> 11)
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#define TLB_IL1I (0x80000000 >> 12)
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#define TLB_IL1D (0x80000000 >> 13)
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#define TLB_IL2I (0x80000000 >> 14)
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#define TLB_IL2D (0x80000000 >> 15)
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#define TLB_U0 (0x80000000 >> 16)
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#define TLB_U1 (0x80000000 >> 17)
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#define TLB_U2 (0x80000000 >> 18)
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#define TLB_U3 (0x80000000 >> 19)
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#define TLB_W (0x80000000 >> 20)
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#define TLB_I (0x80000000 >> 21)
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#define TLB_M (0x80000000 >> 22)
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#define TLB_G (0x80000000 >> 23)
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#define TLB_E (0x80000000 >> 24)
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#define TLB_UX (0x80000000 >> 26)
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#define TLB_UW (0x80000000 >> 27)
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#define TLB_UR (0x80000000 >> 28)
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#define TLB_SX (0x80000000 >> 29)
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#define TLB_SW (0x80000000 >> 30)
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#define TLB_SR (0x80000000 >> 31)
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#define TLB_SIZE 64
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#define TLB_SIZE_4K (0x10000000 >> 24)
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#define TLB_SIZE_16K (0x20000000 >> 24)
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#define TLB_SIZE_64K (0x30000000 >> 24)
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#define TLB_SIZE_256K (0x40000000 >> 24)
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#define TLB_SIZE_1M (0x50000000 >> 24)
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#define TLB_SIZE_16M (0x70000000 >> 24)
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#define TLB_SIZE_256M (0x90000000 >> 24)
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#define TLB_SIZE_1G (0xA0000000 >> 24)
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#endif /* BOOKE_E500 */
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#define TID_KERNEL 0 /* TLB TID to use for kernel (shared) translations */
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#define TID_KRESERVED 1 /* Number of TIDs reserved for kernel */
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#define TID_URESERVED 0 /* Number of TIDs reserved for user */
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#define TID_MIN (TID_KRESERVED + TID_URESERVED)
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#define TID_MAX 255
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#define TID_NONE -1
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#define TLB_UNLOCKED 0
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#if !defined(LOCORE)
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typedef int tlbtid_t;
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struct pmap;
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void tlb_lock(uintptr_t *);
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void tlb_unlock(uintptr_t *);
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void tlb1_ap_prep(void);
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int tlb1_set_entry(vm_offset_t, vm_paddr_t, vm_size_t, uint32_t);
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#endif /* !LOCORE */
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#endif /* _MACHINE_TLB_H_ */
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