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Diff for /src/sys/arch/i386/i386/locore.S between version 1.85 and 1.91

version 1.85, 2009/03/21 14:41:29 version 1.91, 2009/11/27 03:23:10
Line 15 
Line 15 
  * 2. Redistributions in binary form must reproduce the above copyright   * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the   *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.   *    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 Manuel Bouyer.  
  * 4. The name of the author may not be used to endorse or promote products  
  *    derived from this software without specific prior written permission.  
  *   *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
Line 173  __KERNEL_RCSID(0, "$NetBSD$");
Line 168  __KERNEL_RCSID(0, "$NetBSD$");
  * Xen guest identifier and loader selection   * Xen guest identifier and loader selection
  */   */
 .section __xen_guest  .section __xen_guest
 #ifdef XEN3  
         .ascii  "GUEST_OS=netbsd,GUEST_VER=3.0,XEN_VER=xen-3.0"          .ascii  "GUEST_OS=netbsd,GUEST_VER=3.0,XEN_VER=xen-3.0"
 #if defined(DOM0OPS) || !defined(XEN_COMPAT_030001)  #if defined(DOM0OPS) || !defined(XEN_COMPAT_030001)
         .ascii  ",VIRT_BASE=0xc0000000" /* KERNBASE */          .ascii  ",VIRT_BASE=0xc0000000" /* KERNBASE */
Line 190  __KERNEL_RCSID(0, "$NetBSD$");
Line 184  __KERNEL_RCSID(0, "$NetBSD$");
 #ifdef PAE  #ifdef PAE
         .ascii  ",PAE=yes[extended-cr3]"          .ascii  ",PAE=yes[extended-cr3]"
 #endif  #endif
 #else /* !XEN3 */  
         .ascii  "GUEST_OS=netbsd,GUEST_VER=2.0,XEN_VER=2.0"  
 #endif /* XEN3 */  
         .ascii  ",LOADER=generic"          .ascii  ",LOADER=generic"
 #if (NKSYMS || defined(DDB) || defined(MODULAR)) && !defined(SYMTAB_SPACE)  #if (NKSYMS || defined(DDB) || defined(MODULAR)) && !defined(SYMTAB_SPACE)
         .ascii  ",BSD_SYMTAB=yes"          .ascii  ",BSD_SYMTAB=yes"
Line 210  __KERNEL_RCSID(0, "$NetBSD$");
Line 201  __KERNEL_RCSID(0, "$NetBSD$");
         .globl  _C_LABEL(esym)          .globl  _C_LABEL(esym)
         .globl  _C_LABEL(eblob)          .globl  _C_LABEL(eblob)
         .globl  _C_LABEL(atdevbase)          .globl  _C_LABEL(atdevbase)
         .globl  _C_LABEL(proc0uarea),_C_LABEL(PDPpaddr)          .globl  _C_LABEL(lwp0uarea),_C_LABEL(PDPpaddr)
         .globl  _C_LABEL(gdt)          .globl  _C_LABEL(gdt)
         .globl  _C_LABEL(idt)          .globl  _C_LABEL(idt)
         .globl  _C_LABEL(lapic_tpr)          .globl  _C_LABEL(lapic_tpr)
Line 241  _C_LABEL(lapic_tpr):
Line 232  _C_LABEL(lapic_tpr):
 _C_LABEL(cpu):          .long   0       # are we 80486, Pentium, or..  _C_LABEL(cpu):          .long   0       # are we 80486, Pentium, or..
 _C_LABEL(cpuid_level):  .long   0  _C_LABEL(cpuid_level):  .long   0
 _C_LABEL(atdevbase):    .long   0       # location of start of iomem in virtual  _C_LABEL(atdevbase):    .long   0       # location of start of iomem in virtual
 _C_LABEL(proc0uarea):   .long   0  _C_LABEL(lwp0uarea):    .long   0
 _C_LABEL(PDPpaddr):     .long   0       # paddr of PDP, for libkvm  _C_LABEL(PDPpaddr):     .long   0       # paddr of PDP, for libkvm
 _C_LABEL(tablesize):    .long   0  _C_LABEL(tablesize):    .long   0
   
Line 676  begin:
Line 667  begin:
   
         /* Set up bootstrap stack. */          /* Set up bootstrap stack. */
         leal    (PROC0_STK_OFF+KERNBASE)(%esi),%eax          leal    (PROC0_STK_OFF+KERNBASE)(%esi),%eax
         movl    %eax,_C_LABEL(proc0uarea)          movl    %eax,_C_LABEL(lwp0uarea)
         leal    (KSTACK_SIZE-FRAMESIZE)(%eax),%esp          leal    (KSTACK_SIZE-FRAMESIZE)(%eax),%esp
         movl    %esi,(KSTACK_SIZE+PCB_CR3)(%eax)        # pcb->pcb_cr3          movl    %esi,(KSTACK_SIZE+PCB_CR3)(%eax)        # pcb->pcb_cr3
         xorl    %ebp,%ebp               # mark end of frames          xorl    %ebp,%ebp               # mark end of frames
Line 727  start:
Line 718  start:
         popfl          popfl
   
         cld          cld
 #ifdef XEN3  
         movl    %esp, %ebx              # save start of available space          movl    %esp, %ebx              # save start of available space
 #else  
         movl    %esi,%ebx               # save start_info pointer  
 #endif  
         movl    $_RELOC(tmpstk),%esp    # bootstrap stack end location          movl    $_RELOC(tmpstk),%esp    # bootstrap stack end location
   
         /* Clear BSS first so that there are no surprises... */          /* Clear BSS first so that there are no surprises... */
Line 763  start:
Line 750  start:
          * First avail returned by xen_pmap_bootstrap in %eax           * First avail returned by xen_pmap_bootstrap in %eax
          */           */
         movl    %eax, %esi;          movl    %eax, %esi;
         movl    %esi, _C_LABEL(proc0uarea)          movl    %esi, _C_LABEL(lwp0uarea)
   
 #define PROC0PDIR       ((0)              * PAGE_SIZE)  #define PROC0PDIR       ((0)              * PAGE_SIZE)
 #define PROC0STACK      ((1)              * PAGE_SIZE)  #define PROC0STACK      ((1)              * PAGE_SIZE)
Line 779  start:
Line 766  start:
         addl    $4,%esp          addl    $4,%esp
         call    _C_LABEL(main)          call    _C_LABEL(main)
   
 #if defined(XEN3) && !defined(XEN_COMPAT_030001)  #if defined(XEN) && !defined(XEN_COMPAT_030001)
 /* space for the hypercall call page */  /* space for the hypercall call page */
 #define HYPERCALL_PAGE_OFFSET 0x1000  #define HYPERCALL_PAGE_OFFSET 0x1000
 .org HYPERCALL_PAGE_OFFSET  .org HYPERCALL_PAGE_OFFSET
 ENTRY(hypercall_page)  ENTRY(hypercall_page)
 .skip 0x1000  .skip 0x1000
 #endif /* defined(XEN3) && !defined(XEN_COMPAT_030001) */  #endif /* defined(XEN) && !defined(XEN_COMPAT_030001) */
   
 /*  /*
  * void lgdt_finish(void);   * void lgdt_finish(void);
Line 944  ENTRY(cpu_switchto)
Line 931  ENTRY(cpu_switchto)
         jz      1f          jz      1f
   
         /* Save old context. */          /* Save old context. */
         movl    L_ADDR(%esi),%eax          movl    L_PCB(%esi),%eax
         movl    %esp,PCB_ESP(%eax)          movl    %esp,PCB_ESP(%eax)
         movl    %ebp,PCB_EBP(%eax)          movl    %ebp,PCB_EBP(%eax)
   
         /* Switch to newlwp's stack. */          /* Switch to newlwp's stack. */
 1:      movl    L_ADDR(%edi),%ebx  1:      movl    L_PCB(%edi),%ebx
         movl    PCB_EBP(%ebx),%ebp          movl    PCB_EBP(%ebx),%ebp
         movl    PCB_ESP(%ebx),%esp          movl    PCB_ESP(%ebx),%esp
   
Line 1002  ENTRY(cpu_switchto)
Line 989  ENTRY(cpu_switchto)
         jne     5f          jne     5f
   
         /*          /*
          * Restore cr0 (including FPU state).  Raise the IPL to IPL_IPI.           * Restore cr0 (including FPU state).  Raise the IPL to IPL_HIGH.
          * FPU IPIs can alter the LWP's saved cr0.  Dropping the priority           * FPU IPIs can alter the LWP's saved cr0.  Dropping the priority
          * is deferred until mi_switch(), when cpu_switchto() returns.           * is deferred until mi_switch(), when cpu_switchto() returns.
          */           */
 2:  2:
 #ifndef XEN  #ifndef XEN
         movl    $IPL_IPI,CPUVAR(ILEVEL)          movl    $IPL_HIGH,CPUVAR(ILEVEL)
         movl    PCB_CR0(%ebx),%ecx              /* has CR0_TS clear */          movl    PCB_CR0(%ebx),%ecx              /* has CR0_TS clear */
         movl    %cr0,%edx          movl    %cr0,%edx
   
Line 1047  ENTRY(cpu_switchto)
Line 1034  ENTRY(cpu_switchto)
   
 .Lcopy_iobitmap:  .Lcopy_iobitmap:
         /* Copy I/O bitmap. */          /* Copy I/O bitmap. */
           incl    _C_LABEL(pmap_iobmp_evcnt)+EV_COUNT
         movl    $(IOMAPSIZE/4),%ecx          movl    $(IOMAPSIZE/4),%ecx
         pushl   %esi          pushl   %esi
         pushl   %edi          pushl   %edi
Line 1079  END(savectx)
Line 1067  END(savectx)
  * Old call gate entry for syscall   * Old call gate entry for syscall
  */   */
 IDTVEC(osyscall)  IDTVEC(osyscall)
   #ifndef XEN
           /* XXX we are in trouble! interrupts be off here. */
         cli                     # must be first instruction          cli                     # must be first instruction
   #endif
         pushfl                  # set eflags in trap frame          pushfl                  # set eflags in trap frame
         popl    8(%esp)          popl    8(%esp)
         orl     $PSL_I,(%esp)   # re-enable ints on return to user          orl     $PSL_I,(%esp)   # re-enable ints on return to user

Legend:
Removed from v.1.85  
changed lines
  Added in v.1.91

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