Annotation of sys/arch/hppa/include/pmap.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: pmap.h,v 1.33 2004/08/06 22:39:12 deraadt Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 2002-2004 Michael Shalayeff
! 5: * All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: *
! 16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 19: * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
! 20: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 21: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! 22: * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 23: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
! 24: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
! 25: * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
! 26: * THE POSSIBILITY OF SUCH DAMAGE.
! 27: */
! 28:
! 29: #ifndef _MACHINE_PMAP_H_
! 30: #define _MACHINE_PMAP_H_
! 31:
! 32: #include <machine/pte.h>
! 33: #include <uvm/uvm_pglist.h>
! 34: #include <uvm/uvm_object.h>
! 35:
! 36: struct pmap {
! 37: struct uvm_object pm_obj; /* object (lck by object lock) */
! 38: #define pm_lock pm_obj.vmobjlock
! 39: struct vm_page *pm_ptphint;
! 40: struct vm_page *pm_pdir_pg; /* vm_page for pdir */
! 41: volatile u_int32_t *pm_pdir; /* page dir (read-only after create) */
! 42: pa_space_t pm_space; /* space id (read-only after create) */
! 43: u_int pm_pid; /* prot id (read-only after create) */
! 44:
! 45: struct pmap_statistics pm_stats;
! 46: };
! 47: typedef struct pmap *pmap_t;
! 48:
! 49: #define HPPA_MAX_PID 0xfffa
! 50: #define HPPA_SID_MAX 0x7ffd
! 51: #define HPPA_SID_KERNEL 0
! 52: #define HPPA_PID_KERNEL 2
! 53:
! 54: #define KERNEL_ACCESS_ID 1
! 55: #define KERNEL_TEXT_PROT (TLB_AR_KRX | (KERNEL_ACCESS_ID << 1))
! 56: #define KERNEL_DATA_PROT (TLB_AR_KRW | (KERNEL_ACCESS_ID << 1))
! 57:
! 58: struct pv_entry { /* locked by its list's pvh_lock */
! 59: struct pv_entry *pv_next;
! 60: struct pmap *pv_pmap; /* the pmap */
! 61: vaddr_t pv_va; /* the virtual address */
! 62: struct vm_page *pv_ptp; /* the vm_page of the PTP */
! 63: };
! 64:
! 65: /* also match the hardware tlb walker definition */
! 66: struct vp_entry {
! 67: u_int vp_tag;
! 68: u_int vp_tlbprot;
! 69: u_int vp_tlbpage;
! 70: u_int vp_ptr;
! 71: };
! 72:
! 73: #ifdef _KERNEL
! 74:
! 75: extern void gateway_page(void);
! 76: extern struct pmap kernel_pmap_store;
! 77:
! 78: #if defined(HP7100LC_CPU) || defined(HP7300LC_CPU)
! 79: extern int pmap_hptsize;
! 80: extern struct pdc_hwtlb pdc_hwtlb;
! 81: #endif
! 82:
! 83: /*
! 84: * pool quickmaps
! 85: */
! 86: #define pmap_map_direct(pg) ((vaddr_t)VM_PAGE_TO_PHYS(pg))
! 87: #define pmap_unmap_direct(va) PHYS_TO_VM_PAGE((paddr_t)(va))
! 88: #define __HAVE_PMAP_DIRECT
! 89:
! 90: /*
! 91: * according to the parisc manual aliased va's should be
! 92: * different by high 12 bits only.
! 93: */
! 94: #define PMAP_PREFER(o,h) do { \
! 95: vaddr_t pmap_prefer_hint; \
! 96: pmap_prefer_hint = (*(h) & HPPA_PGAMASK) | ((o) & HPPA_PGAOFF); \
! 97: if (pmap_prefer_hint < *(h)) \
! 98: pmap_prefer_hint += HPPA_PGALIAS; \
! 99: *(h) = pmap_prefer_hint; \
! 100: } while(0)
! 101:
! 102: #define pmap_sid2pid(s) (((s) + 1) << 1)
! 103: #define pmap_kernel() (&kernel_pmap_store)
! 104: #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
! 105: #define pmap_update(pm) (void)(pm)
! 106: #define pmap_copy(dpmap,spmap,da,len,sa)
! 107:
! 108: #define pmap_clear_modify(pg) pmap_changebit(pg, 0, PTE_PROT(TLB_DIRTY))
! 109: #define pmap_clear_reference(pg) pmap_changebit(pg, PTE_PROT(TLB_REFTRAP), 0)
! 110: #define pmap_is_modified(pg) pmap_testbit(pg, PTE_PROT(TLB_DIRTY))
! 111: #define pmap_is_referenced(pg) pmap_testbit(pg, PTE_PROT(TLB_REFTRAP))
! 112: #define pmap_phys_address(ppn) ((ppn) << PAGE_SHIFT)
! 113:
! 114: #define pmap_proc_iflush(p,va,len) /* nothing */
! 115: #define pmap_unuse_final(p) /* nothing */
! 116:
! 117: void pmap_bootstrap(vaddr_t);
! 118: boolean_t pmap_changebit(struct vm_page *, u_int, u_int);
! 119: boolean_t pmap_testbit(struct vm_page *, u_int);
! 120: void pmap_write_protect(struct pmap *, vaddr_t, vaddr_t, vm_prot_t);
! 121: void pmap_remove(struct pmap *pmap, vaddr_t sva, vaddr_t eva);
! 122: void pmap_page_remove(struct vm_page *pg);
! 123:
! 124: static __inline int
! 125: pmap_prot(struct pmap *pmap, int prot)
! 126: {
! 127: extern u_int hppa_prot[];
! 128: return (hppa_prot[prot] | (pmap == pmap_kernel()? 0 : TLB_USER));
! 129: }
! 130:
! 131: static __inline void
! 132: pmap_page_protect(struct vm_page *pg, vm_prot_t prot)
! 133: {
! 134: if ((prot & UVM_PROT_WRITE) == 0) {
! 135: if (prot & (UVM_PROT_RX))
! 136: pmap_changebit(pg, 0, PTE_PROT(TLB_WRITE));
! 137: else
! 138: pmap_page_remove(pg);
! 139: }
! 140: }
! 141:
! 142: static __inline void
! 143: pmap_protect(struct pmap *pmap, vaddr_t sva, vaddr_t eva, vm_prot_t prot)
! 144: {
! 145: if ((prot & UVM_PROT_WRITE) == 0) {
! 146: if (prot & (UVM_PROT_RX))
! 147: pmap_write_protect(pmap, sva, eva, prot);
! 148: else
! 149: pmap_remove(pmap, sva, eva);
! 150: }
! 151: }
! 152:
! 153: #endif /* _KERNEL */
! 154: #endif /* _MACHINE_PMAP_H_ */
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