Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files. =================================================================== RCS file: /ftp/cvs/cvsroot/src/sys/arch/i386/i386/locore.S,v rcsdiff: /ftp/cvs/cvsroot/src/sys/arch/i386/i386/locore.S,v: warning: Unknown phrases like `commitid ...;' are present. retrieving revision 1.68 retrieving revision 1.81 diff -u -p -r1.68 -r1.81 --- src/sys/arch/i386/i386/locore.S 2008/04/27 22:40:09 1.68 +++ src/sys/arch/i386/i386/locore.S 2008/11/19 18:35:58 1.81 @@ -1,4 +1,4 @@ -/* $NetBSD: locore.S,v 1.68 2008/04/27 22:40:09 ad Exp $ */ +/* $NetBSD: locore.S,v 1.81 2008/11/19 18:35:58 ad Exp $ */ /* * Copyright-o-rama! @@ -85,13 +85,6 @@ * 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 NetBSD - * Foundation, Inc. and its contributors. - * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED @@ -141,10 +134,11 @@ */ #include -__KERNEL_RCSID(0, "$NetBSD: locore.S,v 1.68 2008/04/27 22:40:09 ad Exp $"); +__KERNEL_RCSID(0, "$NetBSD: locore.S,v 1.81 2008/11/19 18:35:58 ad Exp $"); #include "opt_compat_oldboot.h" #include "opt_ddb.h" +#include "opt_multiboot.h" #include "opt_realmem.h" #include "opt_vm86.h" #include "opt_xen.h" @@ -199,7 +193,7 @@ __KERNEL_RCSID(0, "$NetBSD: locore.S,v 1 .ascii "GUEST_OS=netbsd,GUEST_VER=2.0,XEN_VER=2.0" #endif /* XEN3 */ .ascii ",LOADER=generic" -#if (NKSYMS || defined(DDB) || defined(LKM)) && !defined(SYMTAB_SPACE) +#if (NKSYMS || defined(DDB) || defined(MODULAR)) && !defined(SYMTAB_SPACE) .ascii ",BSD_SYMTAB=yes" #endif .byte 0 @@ -211,7 +205,9 @@ __KERNEL_RCSID(0, "$NetBSD: locore.S,v 1 .data .globl _C_LABEL(cpu) + .globl _C_LABEL(cpuid_level) .globl _C_LABEL(esym) + .globl _C_LABEL(eblob) .globl _C_LABEL(atdevbase) .globl _C_LABEL(proc0uarea),_C_LABEL(PDPpaddr) .globl _C_LABEL(gdt) @@ -242,6 +238,7 @@ _C_LABEL(lapic_tpr): #endif _C_LABEL(cpu): .long 0 # are we 80486, Pentium, or.. +_C_LABEL(cpuid_level): .long 0 _C_LABEL(atdevbase): .long 0 # location of start of iomem in virtual _C_LABEL(proc0uarea): .long 0 _C_LABEL(PDPpaddr): .long 0 # paddr of PDP, for libkvm @@ -315,7 +312,7 @@ _C_LABEL(Multiboot_Header): movw %ax,%fs movw %ax,%gs decl %eax - movl %eax,RELOC(cpu_info_primary)+CPU_INFO_LEVEL + movl %eax,RELOC(cpuid_level) /* Find out our CPU type. */ @@ -475,7 +472,7 @@ trycyrix486: try586: /* Use the `cpuid' instruction. */ xorl %eax,%eax cpuid - movl %eax,RELOC(cpu_info_primary)+CPU_INFO_LEVEL + movl %eax,RELOC(cpuid_level) 2: /* @@ -495,8 +492,8 @@ try586: /* Use the `cpuid' instruction. /* * Virtual address space of kernel: * - * text | data | bss | [syms] | page dir | proc0 kstack | L1 ptp - * 0 1 2 3 + * text | data | bss | [syms] | [blobs] | page dir | proc0 kstack | L1 ptp + * 0 1 2 3 */ #define PROC0_PDIR_OFF 0 @@ -519,7 +516,8 @@ try586: /* Use the `cpuid' instruction. /* Find end of kernel image. */ movl $RELOC(end),%edi -#if (NKSYMS || defined(DDB) || defined(LKM)) && !defined(SYMTAB_SPACE) + +#if (NKSYMS || defined(DDB) || defined(MODULAR)) && !defined(SYMTAB_SPACE) /* Save the symbols (if loaded). */ movl RELOC(esym),%eax testl %eax,%eax @@ -529,8 +527,15 @@ try586: /* Use the `cpuid' instruction. 1: #endif + /* Skip over any modules/blobs. */ + movl RELOC(eblob),%eax + testl %eax,%eax + jz 1f + subl $KERNBASE,%eax + movl %eax,%edi +1: /* Compute sizes */ - movl %edi,%esi # edi = esym ? esym : end + movl %edi,%esi addl $PGOFSET,%esi # page align up andl $~PGOFSET,%esi @@ -644,7 +649,7 @@ try586: /* Use the `cpuid' instruction. movl %cr0,%eax # get control word # enable paging & NPX emulation orl $(CR0_PE|CR0_PG|CR0_NE|CR0_TS|CR0_EM|CR0_MP),%eax - movl %eax,%cr0 # and let's page NOW! + movl %eax,%cr0 # and page NOW! pushl $begin # jump to high mem ret @@ -746,11 +751,11 @@ start: movw %ax,%fs movw %ax,%gs decl %eax - movl %eax,RELOC(cpu_info_primary)+CPU_INFO_LEVEL + movl %eax,RELOC(cpuid_level) xorl %eax,%eax cpuid - movl %eax,RELOC(cpu_info_primary)+CPU_INFO_LEVEL + movl %eax,RELOC(cpuid_level) call xen_pmap_bootstrap /* @@ -803,6 +808,7 @@ NENTRY(lgdt_finish) pushl $GSEL(GCODE_SEL, SEL_KPL) pushl %eax lret +END(lgdt_finish) #endif /* XEN */ @@ -827,6 +833,7 @@ NENTRY(lwp_trampoline) addl $4,%esp jmp .Lsyscall_checkast /* NOTREACHED */ +END(lwp_trampoline) /* * sigcode() @@ -848,6 +855,7 @@ NENTRY(sigcode) int $0x80 # exit if sigreturn fails .globl _C_LABEL(esigcode) _C_LABEL(esigcode): +END(sigcode) /* * int setjmp(label_t *) @@ -865,6 +873,7 @@ ENTRY(setjmp) movl %edx,20(%eax) # save eip xorl %eax,%eax # return 0 ret +END(setjmp) /* * int longjmp(label_t *) @@ -882,6 +891,7 @@ ENTRY(longjmp) movl %edx,(%esp) # put in return frame movl $1,%eax # return 1 ret +END(longjmp) /* * void dumpsys(void) @@ -897,9 +907,10 @@ ENTRY(dumpsys) call _C_LABEL(dodumpsys) # dump! addl $(3*4), %esp # unwind switchframe ret +END(dumpsys) /* - * struct lwp *cpu_switchto(struct lwp *oldlwp, struct newlwp, + * struct lwp *cpu_switchto(struct lwp *oldlwp, struct *newlwp, * bool returning) * * 1. if (oldlwp != NULL), save its context. @@ -914,6 +925,17 @@ ENTRY(cpu_switchto) pushl %esi pushl %edi +#if defined(DIAGNOSTIC) && !defined(XEN) + cmpl $IPL_SCHED,CPUVAR(ILEVEL) + jbe 0f + pushl CPUVAR(ILEVEL) + pushl $.Lstr + call _C_LABEL(panic) + addl $8,%esp +.Lstr: .string "cpu_switchto: switching above IPL_SCHED (%d)\0" +0: +#endif + movl 16(%esp),%esi # oldlwp movl 20(%esp),%edi # newlwp movl 24(%esp),%edx # returning @@ -986,15 +1008,14 @@ ENTRY(cpu_switchto) 2: #ifndef XEN movl $IPL_IPI,CPUVAR(ILEVEL) - movl PCB_CR0(%ebx),%ecx + movl PCB_CR0(%ebx),%ecx /* has CR0_TS clear */ movl %cr0,%edx /* * If our floating point registers are on a different CPU, * set CR0_TS so we'll trap rather than reuse bogus state. */ - movl PCB_FPCPU(%ebx),%eax - cmpl CPUVAR(SELF),%eax + cmpl CPUVAR(FPCURLWP),%edi je 3f orl $CR0_TS,%ecx @@ -1037,6 +1058,7 @@ ENTRY(cpu_switchto) popl %esi movl $((CPU_INFO_IOMAP - CPU_INFO_TSS) << 16),CPUVAR(IOBASE) jmp .Liobitmap_done +END(cpu_switchto) /* * void savectx(struct pcb *pcb); @@ -1048,6 +1070,7 @@ ENTRY(savectx) movl %esp,PCB_ESP(%edx) movl %ebp,PCB_EBP(%edx) ret +END(savectx) /* * osyscall() @@ -1059,6 +1082,7 @@ IDTVEC(osyscall) popl 8(%esp) pushl $7 # size of instruction for restart jmp syscall1 +IDTVEC_END(osyscall) /* * syscall() @@ -1150,6 +1174,39 @@ syscall1: call _C_LABEL(trap) addl $4,%esp jmp .Lsyscall_checkast /* re-check ASTs */ +IDTVEC_END(syscall) + +IDTVEC(svr4_fasttrap) + pushl $2 # size of instruction for restart + pushl $T_ASTFLT # trap # for doing ASTs + INTRENTRY + pushl $RW_READER + pushl $_C_LABEL(svr4_fasttrap_lock) + call _C_LABEL(rw_enter) + addl $8,%esp + call *_C_LABEL(svr4_fasttrap_vec) + pushl $_C_LABEL(svr4_fasttrap_lock) + call _C_LABEL(rw_exit) + addl $4,%esp +2: /* Check for ASTs on exit to user mode. */ + cli + CHECK_ASTPENDING(%eax) + je 1f + /* Always returning to user mode here. */ + CLEAR_ASTPENDING(%eax) + sti + /* Pushed T_ASTFLT into tf_trapno on entry. */ + pushl %esp + call _C_LABEL(trap) + addl $4,%esp + jmp 2b +1: CHECK_DEFERRED_SWITCH + jnz 9f + INTRFASTEXIT +9: sti + call _C_LABEL(pmap_load) + cli + jmp 2b #if NNPX > 0 /* @@ -1172,6 +1229,7 @@ NENTRY(probeintr) outb %al,$0xf0 # clear BUSY# latch popl %eax iret +END(probeintr) /* * void probetrap(void) @@ -1181,6 +1239,7 @@ NENTRY(probetrap) incl _C_LABEL(npx_traps_while_probing) fnclex iret +END(probetrap) /* * int npx586bug1(int a, int b) @@ -1196,21 +1255,25 @@ NENTRY(npx586bug1) fistpl (%esp) popl %eax ret +END(npx586bug1) #endif /* NNPX > 0 */ /* - * void sse2_zero_page(void *pg) + * void sse2_idlezero_page(void *pg) * - * Zero a page without polluting the cache. + * Zero a page without polluting the cache. Preemption must be + * disabled by the caller. Abort if a preemption is pending. */ -ENTRY(sse2_zero_page) +ENTRY(sse2_idlezero_page) pushl %ebp movl %esp,%ebp movl 8(%esp), %edx - movl $PAGE_SIZE, %ecx + movl $(PAGE_SIZE/32), %ecx xorl %eax, %eax .align 16 1: + cmpl $0, CPUVAR(RESCHED) + jnz 2f movnti %eax, 0(%edx) movnti %eax, 4(%edx) movnti %eax, 8(%edx) @@ -1219,43 +1282,15 @@ ENTRY(sse2_zero_page) movnti %eax, 20(%edx) movnti %eax, 24(%edx) movnti %eax, 28(%edx) - subl $32, %ecx - leal 32(%edx), %edx + addl $32, %edx + decl %ecx jnz 1b sfence + incl %eax pop %ebp ret - -/* - * void sse2_copy_page(void *src, void *dst) - * - * Copy a page without polluting the cache. - */ -ENTRY(sse2_copy_page) - pushl %ebp - pushl %ebx - pushl %esi - pushl %edi - movl 20(%esp), %esi - movl 24(%esp), %edi - movl $PAGE_SIZE, %ebp - .align 16 -1: - movl 0(%esi), %eax - movl 4(%esi), %ebx - movl 8(%esi), %ecx - movl 12(%esi), %edx - movnti %eax, 0(%edi) - movnti %ebx, 4(%edi) - movnti %ecx, 8(%edi) - movnti %edx, 12(%edi) - subl $16, %ebp - leal 16(%esi), %esi - leal 16(%edi), %edi - jnz 1b +2: sfence - popl %edi - popl %esi - popl %ebx popl %ebp ret +END(sse2_idlezero_page)