| locore.s (15543) | locore.s (15565) |
|---|---|
| 1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)locore.s 7.3 (Berkeley) 5/13/91 | 1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)locore.s 7.3 (Berkeley) 5/13/91 |
| 37 * $Id: locore.s,v 1.68 1996/04/30 11:58:56 phk Exp $ | 37 * $Id: locore.s,v 1.69 1996/05/02 14:19:43 phk Exp $ |
| 38 * 39 * originally from: locore.s, by William F. Jolitz 40 * 41 * Substantially rewritten by David Greenman, Rod Grimes, 42 * Bruce Evans, Wolfgang Solfrank, Poul-Henning Kamp 43 * and many others. 44 */ 45 --- 53 unchanged lines hidden (view full) --- 99 ALIGN_DATA /* just to be sure */ 100 101 .globl tmpstk 102 .space 0x2000 /* space for tmpstk - temporary stack */ 103tmpstk: 104 105 .globl _boothowto,_bootdev 106 | 38 * 39 * originally from: locore.s, by William F. Jolitz 40 * 41 * Substantially rewritten by David Greenman, Rod Grimes, 42 * Bruce Evans, Wolfgang Solfrank, Poul-Henning Kamp 43 * and many others. 44 */ 45 --- 53 unchanged lines hidden (view full) --- 99 ALIGN_DATA /* just to be sure */ 100 101 .globl tmpstk 102 .space 0x2000 /* space for tmpstk - temporary stack */ 103tmpstk: 104 105 .globl _boothowto,_bootdev 106 |
| 107 .globl _cpu,_atdevbase,_cpu_vendor,_cpu_id,_bootinfo | 107 .globl _cpu,_cpu_vendor,_cpu_id,_bootinfo |
| 108 .globl _cpu_high, _cpu_feature 109 110_cpu: .long 0 /* are we 386, 386sx, or 486 */ 111_cpu_id: .long 0 /* stepping ID */ 112_cpu_high: .long 0 /* highest arg to CPUID */ 113_cpu_feature: .long 0 /* features */ 114_cpu_vendor: .space 20 /* CPU origin code */ 115_bootinfo: .space BOOTINFO_SIZE /* bootinfo that we can handle */ | 108 .globl _cpu_high, _cpu_feature 109 110_cpu: .long 0 /* are we 386, 386sx, or 486 */ 111_cpu_id: .long 0 /* stepping ID */ 112_cpu_high: .long 0 /* highest arg to CPUID */ 113_cpu_feature: .long 0 /* features */ 114_cpu_vendor: .space 20 /* CPU origin code */ 115_bootinfo: .space BOOTINFO_SIZE /* bootinfo that we can handle */ |
| 116_atdevbase: .long 0 /* location of start of iomem in virtual */ | |
| 117 118_KERNend: .long 0 /* phys addr end of kernel (just after bss) */ 119physfree: .long 0 /* phys addr of next free page */ 120upa: .long 0 /* phys addr of proc0's UPAGES */ 121p0upt: .long 0 /* phys addr of proc0's UPAGES page table */ 122 123 .globl _IdlePTD 124_IdlePTD: .long 0 /* phys addr of kernel PTD */ --- 26 unchanged lines hidden (view full) --- 151 movl $((foo)*PAGE_SIZE),%ecx ; \ 152 xorl %eax,%eax ; \ 153 cld ; \ 154 rep ; \ 155 stosb 156 157/* 158 * fillkpt | 116 117_KERNend: .long 0 /* phys addr end of kernel (just after bss) */ 118physfree: .long 0 /* phys addr of next free page */ 119upa: .long 0 /* phys addr of proc0's UPAGES */ 120p0upt: .long 0 /* phys addr of proc0's UPAGES page table */ 121 122 .globl _IdlePTD 123_IdlePTD: .long 0 /* phys addr of kernel PTD */ --- 26 unchanged lines hidden (view full) --- 150 movl $((foo)*PAGE_SIZE),%ecx ; \ 151 xorl %eax,%eax ; \ 152 cld ; \ 153 rep ; \ 154 stosb 155 156/* 157 * fillkpt |
| 159 * eax = (page frame address | control | status) == pte 160 * ebx = address of page table | 158 * eax = page frame address 159 * ebx = index into page table |
| 161 * ecx = how many pages to map | 160 * ecx = how many pages to map |
| 161 * base = base address of page dir/table 162 * prot = protection bits |
|
| 162 */ | 163 */ |
| 163#define fillkpt \ 1641: movl %eax,(%ebx) ; \ 165 addl $PAGE_SIZE,%eax ; /* increment physical address */ \ 166 addl $4,%ebx ; /* next pte */ \ | 164#define fillkpt(base, prot) \ 165 shll $2, %ebx ; \ 166 addl base, %ebx ; \ 167 orl $PG_V+prot, %eax ; \ 1681: movl %eax,(%ebx) ; \ 169 addl $PAGE_SIZE,%eax ; /* increment physical address */ \ 170 addl $4,%ebx ; /* next pte */ \ |
| 167 loop 1b 168 | 171 loop 1b 172 |
| 173/* 174 * fillkptphys(prot) 175 * eax = physical address 176 * ecx = how many pages to map 177 * prot = protection bits 178 */ 179#define fillkptphys(prot) \ 180 movl %eax, %ebx ; \ 181 shrl $PAGE_SHIFT, %ebx ; \ 182 fillkpt(R(_KPTphys), prot) 183 |
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| 169 .text 170/********************************************************************** 171 * 172 * This is where the bootblocks start us, set the ball rolling... 173 * 174 */ 175NON_GPROF_ENTRY(btext) 176 --- 506 unchanged lines hidden (view full) --- 683 je over_symalloc 684 movl %edi,%esi 685 movl $KERNBASE,%edi 686 addl %edi,R(_bootinfo+BI_SYMTAB) 687 addl %edi,R(_bootinfo+BI_ESYMTAB) 688over_symalloc: 689#endif 690 | 184 .text 185/********************************************************************** 186 * 187 * This is where the bootblocks start us, set the ball rolling... 188 * 189 */ 190NON_GPROF_ENTRY(btext) 191 --- 506 unchanged lines hidden (view full) --- 698 je over_symalloc 699 movl %edi,%esi 700 movl $KERNBASE,%edi 701 addl %edi,R(_bootinfo+BI_SYMTAB) 702 addl %edi,R(_bootinfo+BI_ESYMTAB) 703over_symalloc: 704#endif 705 |
| 691 addl $PAGE_SIZE-1,%esi 692 andl $~(PAGE_SIZE-1),%esi | 706 addl $PAGE_MASK,%esi 707 andl $~PAGE_MASK,%esi |
| 693 movl %esi,R(_KERNend) /* save end of kernel */ 694 movl %esi,R(physfree) /* next free page is at end of kernel */ 695 696/* Allocate Kernel Page Tables */ 697 ALLOCPAGES(NKPT) 698 movl %esi,R(_KPTphys) 699 700/* Allocate Page Table Directory */ --- 6 unchanged lines hidden (view full) --- 707 addl $KERNBASE, %esi 708 movl %esi, R(_proc0paddr) 709 710/* Allocate proc0's page table for the UPAGES. */ 711 ALLOCPAGES(1) 712 movl %esi,R(p0upt) 713 714/* Map read-only from zero to the end of the kernel text section */ | 708 movl %esi,R(_KERNend) /* save end of kernel */ 709 movl %esi,R(physfree) /* next free page is at end of kernel */ 710 711/* Allocate Kernel Page Tables */ 712 ALLOCPAGES(NKPT) 713 movl %esi,R(_KPTphys) 714 715/* Allocate Page Table Directory */ --- 6 unchanged lines hidden (view full) --- 722 addl $KERNBASE, %esi 723 movl %esi, R(_proc0paddr) 724 725/* Allocate proc0's page table for the UPAGES. */ 726 ALLOCPAGES(1) 727 movl %esi,R(p0upt) 728 729/* Map read-only from zero to the end of the kernel text section */ |
| 715 movl R(_KPTphys), %esi 716 movl $R(_etext),%ecx 717 addl $PAGE_SIZE-1,%ecx 718 shrl $PAGE_SHIFT,%ecx 719 movl $PG_V|PG_KR,%eax 720 movl %esi, %ebx | 730 xorl %eax, %eax |
| 721#ifdef BDE_DEBUGGER 722/* If the debugger is present, actually map everything read-write. */ 723 cmpl $0,R(_bdb_exists) 724 jne map_read_write 725#endif | 731#ifdef BDE_DEBUGGER 732/* If the debugger is present, actually map everything read-write. */ 733 cmpl $0,R(_bdb_exists) 734 jne map_read_write 735#endif |
| 726 fillkpt | 736 movl $R(_etext),%ecx 737 addl $PAGE_MASK,%ecx 738 shrl $PAGE_SHIFT,%ecx 739 fillkptphys(0) |
| 727 728/* Map read-write, data, bss and symbols */ | 740 741/* Map read-write, data, bss and symbols */ |
| 742 movl $R(_etext),%eax |
|
| 729map_read_write: | 743map_read_write: |
| 730 andl $PG_FRAME,%eax | |
| 731 movl R(_KERNend),%ecx 732 subl %eax,%ecx 733 shrl $PAGE_SHIFT,%ecx | 744 movl R(_KERNend),%ecx 745 subl %eax,%ecx 746 shrl $PAGE_SHIFT,%ecx |
| 734 orl $PG_V|PG_KW,%eax 735 fillkpt | 747 fillkptphys(PG_RW) |
| 736 737/* Map page directory. */ 738 movl R(_IdlePTD), %eax 739 movl $1, %ecx | 748 749/* Map page directory. */ 750 movl R(_IdlePTD), %eax 751 movl $1, %ecx |
| 740 movl %eax, %ebx 741 shrl $PAGE_SHIFT-2, %ebx 742 addl R(_KPTphys), %ebx 743 orl $PG_V|PG_KW, %eax 744 fillkpt | 752 fillkptphys(PG_RW) |
| 745 746/* Map proc0's page table for the UPAGES the physical way. */ 747 movl R(p0upt), %eax 748 movl $1, %ecx | 753 754/* Map proc0's page table for the UPAGES the physical way. */ 755 movl R(p0upt), %eax 756 movl $1, %ecx |
| 749 movl %eax, %ebx 750 shrl $PAGE_SHIFT-2, %ebx 751 addl R(_KPTphys), %ebx 752 orl $PG_V|PG_KW, %eax 753 fillkpt | 757 fillkptphys(PG_RW) |
| 754 755/* Map proc0s UPAGES the physical way */ 756 movl R(upa), %eax 757 movl $UPAGES, %ecx | 758 759/* Map proc0s UPAGES the physical way */ 760 movl R(upa), %eax 761 movl $UPAGES, %ecx |
| 758 movl %eax, %ebx 759 shrl $PAGE_SHIFT-2, %ebx 760 addl R(_KPTphys), %ebx 761 orl $PG_V|PG_KW, %eax 762 fillkpt | 762 fillkptphys(PG_RW) |
| 763 | 763 |
| 764/* ... and in the special page table for this purpose. */ | 764/* Map ISA hole */ 765 movl $ISA_HOLE_START, %eax 766 movl $ISA_HOLE_LENGTH>>PAGE_SHIFT, %ecx 767 fillkptphys(PG_RW|PG_N) 768 769/* Map proc0s UPAGES in the special page table for this purpose. */ |
| 765 movl R(upa), %eax | 770 movl R(upa), %eax |
| 771 movl $KSTKPTEOFF, %ebx |
|
| 766 movl $UPAGES, %ecx | 772 movl $UPAGES, %ecx |
| 767 orl $PG_V|PG_KW, %eax 768 movl R(p0upt), %ebx 769 addl $(KSTKPTEOFF * PTESIZE), %ebx 770 fillkpt | 773 fillkpt(R(p0upt), PG_RW) |
| 771 772/* and put the page table in the pde. */ 773 movl R(p0upt), %eax | 774 775/* and put the page table in the pde. */ 776 movl R(p0upt), %eax |
| 774 movl R(_IdlePTD), %esi 775 orl $PG_V|PG_KW,%eax 776 movl %eax,KSTKPTDI*PDESIZE(%esi) | 777 movl $KSTKPTDI, %ebx 778 movl $1, %ecx 779 fillkpt(R(_IdlePTD), PG_RW) |
| 777 | 780 |
| 778/* Map ISA hole */ 779#define ISA_HOLE_START 0xa0000 780#define ISA_HOLE_LENGTH (0x100000-ISA_HOLE_START) 781 movl $ISA_HOLE_LENGTH>>PAGE_SHIFT, %ecx 782 movl $ISA_HOLE_START, %eax 783 movl %eax, %ebx 784/* XXX 2 is magic for log2(PTESIZE). */ 785 shrl $PAGE_SHIFT-2, %ebx 786 addl R(_KPTphys), %ebx 787/* XXX could load %eax directly with $ISA_HOLE_START|PG_V|PG_KW_PG_N. */ 788 orl $PG_V|PG_KW|PG_N, %eax 789 fillkpt 790/* XXX could load %eax directly with $ISA_HOLE_START+KERNBASE. */ 791 movl $ISA_HOLE_START, %eax 792 addl $KERNBASE, %eax 793 movl %eax, R(_atdevbase) 794 | |
| 795/* install a pde for temporary double map of bottom of VA */ | 781/* install a pde for temporary double map of bottom of VA */ |
| 796 movl R(_IdlePTD), %esi | |
| 797 movl R(_KPTphys), %eax | 782 movl R(_KPTphys), %eax |
| 798 orl $PG_V|PG_KW, %eax 799 movl %eax, (%esi) | 783 xorl %ebx, %ebx 784 movl $1, %ecx 785 fillkpt(R(_IdlePTD), PG_RW) |
| 800 801/* install pde's for pt's */ | 786 787/* install pde's for pt's */ |
| 802 movl R(_IdlePTD), %esi | |
| 803 movl R(_KPTphys), %eax | 788 movl R(_KPTphys), %eax |
| 804 orl $PG_V|PG_KW, %eax 805 movl $(NKPT), %ecx 806 lea (KPTDI*PDESIZE)(%esi), %ebx 807 fillkpt | 789 movl $KPTDI, %ebx 790 movl $NKPT, %ecx 791 fillkpt(R(_IdlePTD), PG_RW) |
| 808 809/* install a pde recursively mapping page directory as a page table */ | 792 793/* install a pde recursively mapping page directory as a page table */ |
| 810 movl R(_IdlePTD), %esi 811 movl %esi,%eax 812 orl $PG_V|PG_KW,%eax 813 movl %eax,PTDPTDI*PDESIZE(%esi) | 794 movl R(_IdlePTD), %eax 795 movl $PTDPTDI, %ebx 796 movl $1,%ecx 797 fillkpt(R(_IdlePTD), PG_RW) |
| 814 815 ret 816 817#ifdef BDE_DEBUGGER 818bdb_prepare_paging: 819 cmpl $0,R(_bdb_exists) 820 je bdb_prepare_paging_exit 821 --- 74 unchanged lines hidden --- | 798 799 ret 800 801#ifdef BDE_DEBUGGER 802bdb_prepare_paging: 803 cmpl $0,R(_bdb_exists) 804 je bdb_prepare_paging_exit 805 --- 74 unchanged lines hidden --- |