/* $NetBSD: pmap_motorola.h,v 1.64 2026/07/06 14:33:55 thorpej Exp $ */ /* * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * @(#)pmap.h 8.1 (Berkeley) 6/10/93 */ /* * Copyright (c) 1987 Carnegie-Mellon University * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * @(#)pmap.h 8.1 (Berkeley) 6/10/93 */ #ifndef _M68K_PMAP_MOTOROLA_H_ #define _M68K_PMAP_MOTOROLA_H_ #if defined(_KERNEL) #if !defined(_MODULE) #ifdef _KERNEL_OPT #include "opt_m68k_arch.h" #endif #include <sys/kcore.h> #include <m68k/kcore.h> #include <machine/cpu.h> #include <machine/pte.h> #define NPTEPG (PAGE_SIZE / (sizeof(pt_entry_t))) /* * Pmap stuff */ struct pmap { pt_entry_t *pm_ptab; /* KVA of page table */ st_entry_t *pm_stab; /* KVA of segment table */ u_int pm_stfree; /* 040: free lev2 blocks */ st_entry_t *pm_stpa; /* 040: ST phys addr */ uint16_t pm_sref; /* segment table ref count */ u_int pm_count; /* pmap reference count */ struct pmap_statistics pm_stats; /* pmap statistics */ int pm_ptpages; /* more stats: PT pages */ }; /* * pmap-specific data stored in the vm_physmem[] array. */ struct pmap_physseg { struct pv_header *pvheader; /* pv table for this seg */ }; #define __HAVE_PMAP_PHYSSEG /* * Root Pointer attributes for Supervisor and User modes. * * Supervisor: * - No index limit (Lower limit == 0) * - Points to Short format descriptor table. * - Shared Globally * * User: * - No index limit (Lower limit == 0) * - Points to Short format descriptor table. */ #define MMU51_SRP_BITS (DTE51_LOWER | DTE51_SG | DT51_SHORT) #define MMU51_CRP_BITS (DTE51_LOWER | DT51_SHORT) /* * MMU specific segment values * * We are using following segment layout in m68k pmap_motorola.c: * 68020/030 4KB/page: l1,l2,page == 10,10,12 (%tc = 0x82c0aa00) * 68020/030 8KB/page: l1,l2,page == 8,11,13 (%tc = 0x82d08b00) * 68040/060 4KB/page: l1,l2,l3,page == 7,7,6,12 (%tc = 0x8000) * 68040/060 8KB/page: l1,l2,l3,page == 7,7,5,13 (%tc = 0xc000) * * 68020/030 l2 size is chosen per NPTEPG, a number of page table entries * per page, to use one whole page for PTEs per one segment table entry, * and maybe also because 68020 HP MMU machines use similar structures. * * 68040/060 layout is defined by hardware design and not configurable, * as defined in <m68k/pte_motorola.h>. * * Even on 68040/060, we still appropriate 2-level ste-pte pmap structures * for 68020/030 (derived from 4.4BSD/hp300) to handle 040's 3-level MMU. * TIA_SIZE and TIB_SIZE are used to represent such pmap structures and * they are also referred on 040/060. * * NBSEG and SEGOFSET are used to check l2 STE of the specified VA, * so they have different values between 020/030 and 040/060. */ /* 8KB / 4KB */ #define TIB_SHIFT (PAGE_SHIFT - 2) /* 11 / 10 */ #define TIB_SIZE (1U << TIB_SHIFT) /* 2048 / 1024 */ #define TIA_SHIFT (32 - TIB_SHIFT - PAGE_SHIFT) /* 8 / 10 */ #define TIA_SIZE (1U << TIA_SHIFT) /* 256 / 1024 */ #define MMU51_TCR_BITS (TCR51_E | TCR51_SRE | \ __SHIFTIN(PAGE_SHIFT, TCR51_PS) | \ __SHIFTIN(TIA_SHIFT, TCR51_TIA) | \ __SHIFTIN(TIB_SHIFT, TCR51_TIB)) #define MMU40_TCR_BITS (TCR40_E | \ __SHIFTIN(PAGE_SHIFT - 12, TCR40_P)) #define SEGSHIFT (TIB_SHIFT + PAGE_SHIFT) /* 24 / 22 */ #define NBSEG30 (1U << SEGSHIFT) #define NBSEG40 (1U << SG4_SHIFT2) #if ( defined(M68020) || defined(M68030)) && \ (!defined(M68040) && !defined(M68060)) #define NBSEG NBSEG30 #elif ( defined(M68040) || defined(M68060)) && \ (!defined(M68020) && !defined(M68030)) #define NBSEG NBSEG40 #else #define NBSEG ((mmutype == MMU_68040) ? NBSEG40 : NBSEG30) #endif #define SEGOFSET (NBSEG - 1) /* byte offset into segment */ #define m68k_round_seg(x) ((((vaddr_t)(x)) + SEGOFSET) & ~SEGOFSET) #define m68k_trunc_seg(x) ((vaddr_t)(x) & ~SEGOFSET) #define m68k_seg_offset(x) ((vaddr_t)(x) & SEGOFSET) /* * On the 040, we keep track of which level 2 blocks are already in use * with the pm_stfree mask. Bits are arranged from LSB (block 0) to MSB * (block 31). For convenience, the level 1 table is considered to be * block 0. * * MAX[KU]L2SIZE control how many pages of level 2 descriptors are allowed * for the kernel and users. * 16 or 8 implies only the initial "segment table" page is used, * i.e. it means PAGE_SIZE / (SG4_LEV1SIZE * sizeof(st_entry_t)). * WARNING: don't change MAXUL2SIZE unless you can allocate * physically contiguous pages for the ST in pmap_motorola.c! */ #define MAXKL2SIZE 32 #define MAXUL2SIZE (8 * (PAGE_SIZE / 0x1000)) #define l2tobm(n) (1U << (n)) #define bmtol2(n) (ffs(n) - 1) /* * For each struct vm_page, there is a list of all currently valid virtual * mappings of that page. An entry is a pv_entry, the list is pv_table. */ struct pv_entry { struct pv_entry *pv_next; /* next pv_entry */ struct pmap *pv_pmap; /* pmap where mapping lies */ vaddr_t pv_va; /* virtual address for mapping */ st_entry_t *pv_ptste; /* non-zero if VA maps a PT page */ struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ }; extern struct pv_header *pv_table; /* array of entries, one per page */ #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) static __inline bool pmap_remove_all(struct pmap *pmap) { /* Nothing. */ return false; } /* This is at the end of the kernel virtual address space. */ #ifndef SYSMAP_VA #define SYSMAP_VA ((vaddr_t)(0-PAGE_SIZE*NPTEPG)) #endif extern paddr_t Sysseg_pa; extern st_entry_t *Sysseg; extern pt_entry_t *Sysmap, *Sysptmap; extern vsize_t Sysptsize; extern vaddr_t virtual_avail, virtual_end; #if defined(M68040) || defined(M68060) extern u_int protostfree; #endif extern char *vmmap; /* map for mem, dumps, etc. */ extern void *CADDR1, *CADDR2; extern void *msgbufaddr; /* for lwp0 uarea initialization after MMU enabled */ extern vaddr_t lwp0uarea; void * pmap_bootstrap2(void); void pmap_procwr(struct proc *, vaddr_t, size_t); #define PMAP_NEED_PROCWR #ifdef M68K_EC_VAC void pmap_init_vac(size_t); void pmap_prefer(vaddr_t, vaddr_t *); #define PMAP_PREFER(foff, vap, sz, td) pmap_prefer((foff), (vap)) #endif /* * pmap hook for trap()'s page fault handler. We don't need to * do anything special, so it just goes to uvm_fault(). */ #define pmap_fault(m, v, t) uvm_fault((m), (v), (t)) void _pmap_set_page_cacheable(struct pmap *, vaddr_t); void _pmap_set_page_cacheinhibit(struct pmap *, vaddr_t); int _pmap_page_is_cacheable(struct pmap *, vaddr_t); phys_ram_seg_t *pmap_init_kcore_hdr(cpu_kcore_hdr_t *); paddr_t vtophys(vaddr_t va); /* Copy definitions from new pmap_68k.h to ease transition. */ struct pmap_bootmap { union { vaddr_t pmbm_vaddr; vaddr_t * pmbm_vaddr_ptr; }; paddr_t pmbm_paddr; size_t pmbm_size; int pmbm_flags; }; #define PMBM_F_VAONLY __BIT(0) #define PMBM_F_FIXEDVA __BIT(1) #define PMBM_F_KEEPOUT __BIT(2) #define PMBM_F_CI __BIT(3) /* cache-inhibited mapping */ #define PMBM_F_CWT __BIT(4) /* write-through cacheable mapping */ #define PMBM_F_RO __BIT(5) /* read-only mapping */ extern struct pmap_bootmap machine_bootmap[]; bool pmap_pa_has_static_mapping(paddr_t, size_t, vm_prot_t, vaddr_t *, int *); bool pmap_va_is_static_mapping(vaddr_t va, size_t); /* Kernel debugger support functions. */ struct pmap_db_write_text_context { vaddr_t pgva; volatile pt_entry_t * ptep; pt_entry_t opte; }; bool pmap_db_write_text_enter(vaddr_t, struct pmap_db_write_text_context *); void pmap_db_write_text_exit(struct pmap_db_write_text_context *); /* * pmap_bootstrap1() may need to relocate global references, and perform * VA <-> PA conversions. These macros facilitate these conversions, and * can be overridden in <machine/pmap.h> before including <m68k/pmap_68k.h> * if needed. * * The first two macros are specifically for converting addresses within * the confines of pmap_bootstrap1(). We may be running with the MMU off * (and either VA==PA or VA!=PA) or with the MMU on with some mappings. * The default ones are suitable for the "MMU off" case with the relocation * offset passed in the "reloff" variable. * * - PMAP_BOOTSTRAP_RELOC_GLOB() -- relocate a global reference in order * to access it during bootstrap. * * - PMAP_BOOTSTRAP_RELOC_PA() -- relocate a physical address in order to * access it during bootstrap. * * The next two macros are intended to convert kernel virtual <-> physical * addresses that will be used in the context of the running kernel once * the MMU is enabled and running on the kernel's ultimate mappings: * * - PMAP_BOOTSTRAP_VA_TO_PA() -- convert a kernel virtual address to * a physical address using linear relocation. * * - PMAP_BOOTSTRAP_PA_TO_VA() -- and vice versa. */ #ifndef PMAP_BOOTSTRAP_RELOC_GLOB #define PMAP_BOOTSTRAP_RELOC_GLOB(va) \ ((((vaddr_t)(va)) - VM_MIN_KERNEL_ADDRESS) + reloff) #endif #ifndef PMAP_BOOTSTRAP_RELOC_PA #define PMAP_BOOTSTRAP_RELOC_PA(pa) \ ((vaddr_t)(pa)) #endif #ifndef PMAP_BOOTSTRAP_VA_TO_PA #define PMAP_BOOTSTRAP_VA_TO_PA(va) \ ((((vaddr_t)(va)) - VM_MIN_KERNEL_ADDRESS) + reloff) #endif #ifndef PMAP_BOOTSTRAP_PA_TO_VA #define PMAP_BOOTSTRAP_PA_TO_VA(pa) \ (VM_MIN_KERNEL_ADDRESS + (((paddr_t)(pa)) - reloff)) #endif #endif /* ! _MODULE */ /* * Some pmap(9) API macros should be defined here for module(7). * Luckily, all m68k pmap implementations behave this way. (see PR/54869) */ #define pmap_update(pmap) __nothing /* nothing (yet) */ #endif /* _KERNEL */ #endif /* !_M68K_PMAP_MOTOROLA_H_ */
