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sys/i386/i386/vm86bios.s
| Show First 20 Lines • Show All 94 Lines • ▼ Show 20 Lines | 1: | ||||
| movl %eax,0(%ebx) | movl %eax,0(%ebx) | ||||
| movl 4(%edi),%eax | movl 4(%edi),%eax | ||||
| movl %eax,4(%ebx) | movl %eax,4(%ebx) | ||||
| movl $GPROC0_SEL*8,%esi /* GSEL(entry, SEL_KPL) */ | movl $GPROC0_SEL*8,%esi /* GSEL(entry, SEL_KPL) */ | ||||
| ltr %si | ltr %si | ||||
| movl %cr3,%eax | movl %cr3,%eax | ||||
| pushl %eax /* save address space */ | pushl %eax /* save address space */ | ||||
| movl IdlePTD,%ecx | movl IdlePTD,%ecx /* va (and pa) of Idle PTD */ | ||||
| movl %ecx,%ebx | movl %ecx,%ebx | ||||
| addl $KERNBASE,%ebx /* va of Idle PTD */ | |||||
| movl 0(%ebx),%eax | movl 0(%ebx),%eax | ||||
| pushl %eax /* old ptde != 0 when booting */ | pushl %eax /* old ptde != 0 when booting */ | ||||
| pushl %ebx /* keep for reuse */ | pushl %ebx /* keep for reuse */ | ||||
| movl %esp,SCR_STACK(%edx) /* save current stack location */ | movl %esp,SCR_STACK(%edx) /* save current stack location */ | ||||
| movl SCR_NEWPTD(%edx),%eax /* mapping for vm86 page table */ | movl SCR_NEWPTD(%edx),%eax /* mapping for vm86 page table */ | ||||
| movl %eax,0(%ebx) /* ... install as PTD entry 0 */ | movl %eax,0(%ebx) /* ... install as PTD entry 0 */ | ||||
| #if defined(PAE) || defined(PAE_TABLES) | #if defined(PAE) || defined(PAE_TABLES) | ||||
| movl IdlePDPT,%ecx | movl IdlePDPT,%ecx | ||||
| #endif | #endif | ||||
| movl %ecx,%cr3 /* new page tables */ | movl %ecx,%cr3 /* new page tables */ | ||||
| movl SCR_VMFRAME(%edx),%esp /* switch to new stack */ | movl SCR_VMFRAME(%edx),%esp /* switch to new stack */ | ||||
| pushl %esp | pushl %esp | ||||
| call vm86_prepcall /* finish setup */ | movl $vm86_prepcall, %eax | ||||
| call *%eax /* finish setup */ | |||||
| add $4, %esp | add $4, %esp | ||||
| /* | /* | ||||
| * Return via doreti | * Return via doreti | ||||
| */ | */ | ||||
| MEXITCOUNT | MEXITCOUNT | ||||
| jmp doreti | jmp doreti | ||||
| Show All 39 Lines | |||||