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title "MP primitives for Compaq SystemPro";++;;Copyright (c) 1991 Microsoft Corporation;;Module Name:;; spsproca.asm;;Abstract:;; SystemPro Start Next Processor assemble code;; This module along with mpspro.c implement the code to start; off the second processor on the Compaq SystemPro.;;Author:;; Ken Reneris (kenr) 12-Jan-1992;;Revision History:;;--
.386p .xlistinclude hal386.incinclude callconv.inc ; calling convention macrosinclude i386\kimacro.incinclude mac386.incinclude i386\spmp.inc .list
EXTRNP _HalpBuildTiledCR3,1 EXTRNP _HalpFreeTiledCR3,0
extrn _MppIDT:DWORD extrn _MpLowStub:DWORD extrn _MpLowStubPhysicalAddress:DWORD extrn _MpCount:DWORD extrn _SpProcessorControlPort:WORD extrn _SpType:BYTE
;; Internal defines and structures;
PxParamBlock struc SPx_flag dd ? SPx_TiledCR3 dd ? SPx_P0EBP dd ? SPx_ControlPort dd ? SPx_PB db processorstatelength dup (?)PxParamBlock ends
_TEXT SEGMENT PARA PUBLIC 'CODE' ; Start 32 bit code ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING
;++;; BOOLEAN; HalStartNextProcessor (; IN PLOADER_BLOCK pLoaderBlock,; IN PKPROCESSOR_STATE pProcessorState; );; Routine Description:;; This routine is called by the kernel durning kernel initialization; to obtain more processors. It is called until no more processors; are available.;; If another processor exists this function is to initialize it to; the passed in processorstate structure, and return TRUE.;; If another processor does not exists, then a FALSE is returned.;; Also note that the loader block has been setup for the next processor.; The new processor logical thread number can be obtained from it, if; required.;; Arguments:; pLoaderBlock, - Loader block which has been intialized for the; next processor.;; pProcessorState - The processor state which is to be loaded into; the next processor.;;; Return Value:;; TRUE - ProcessorNumber was dispatched.; FALSE - A processor was not dispatched. no other processors exists.;;--
pLoaderBlock equ dword ptr [ebp+8] ; zero basedpProcessorState equ dword ptr [ebp+12]
;; Local variables;
PxFrame equ [ebp - size PxParamBlock]
cPublicProc _HalStartNextProcessor ,2 push ebp ; save ebp mov ebp, esp ;
sub esp, size PxParamBlock ; Make room for local vars
push esi push edi push ebx
xor eax, eax mov PxFrame.SPx_flag, eax
cmp _MpCount, eax jbe snp_exit ; exit FALSE
mov esi, OFFSET FLAT:StartPx_RMStub mov ecx, StartPx_RMStub_Len mov edi, _MpLowStub ; Copy RMStub to low memory add edi, size PxParamBlock rep movsb
lea edi, PxFrame.SPx_PB mov esi, pProcessorState mov ecx, processorstatelength ; Copy processorstate rep movsb ; to PxFrame
stdCall _HalpBuildTiledCR3, <pProcessorState>
mov PxFrame.SPx_TiledCR3, eax mov PxFrame.SPx_P0EBP, ebp
mov eax, pLoaderBlock ; lookup processor # we are mov eax, [eax].LpbPrcb ; starting movzx eax, byte ptr [eax].PbNumber movzx edx, _SpProcessorControlPort[eax*2] ; Get processor's control port mov PxFrame.SPx_ControlPort, edx ; Pass it along
mov ecx, size PxParamBlock ; copy param block lea esi, PxFrame ; to low memory stub mov edi, _MpLowStub mov eax, edi rep movsb
add eax, size PxParamBlock mov ebx, OFFSET FLAT:StartPx_RMStub sub eax, ebx ; (eax) = adjusted pointer mov bx, word ptr [PxFrame.SPx_PB.PsContextFrame.CsSegCs] mov [eax.SPrxFlatCS], bx ; patch realmode stub with mov [eax.SPrxPMStub], offset _StartPx_PMStub ; valid long jump
mov ebx, _MppIDT add ebx, WarmResetVector
cli push dword ptr [ebx] ; Save current vector
mov eax, _MpLowStubPhysicalAddress shl eax, 12 ; seg:0 add eax, size PxParamBlock mov dword ptr [ebx], eax ; start Px here
cmp _SpType, SMP_SYSPRO2 ; Belize? jne short snp10 ; no, reset normal
mov dx, SMP_INDEX_PORT
mov eax, pLoaderBlock ; lookup processor # we are mov eax, [eax].LpbPrcb ; starting movzx eax, byte ptr [eax].PbNumber or eax, (SMP_RESET_CPU shl 24) + (SMP_CSR_PORT shl 8)
out dx, eax ; issue Belize reset to processor jmp short snp20 ; go wait
snp10: mov edx, PxFrame.SPx_ControlPort ; Control port of target in al, dx ; processor or al, RESET ; assert RESET and al, NOT SLEEP ; wakeup P1 out dx, al ; reset P1
snp20: cmp PxFrame.SPx_flag, 0 ; wait for Px to get it's jz snp20 ; info
pop dword ptr [ebx] ; restore WarmResetVector sti
stdCall _HalpFreeTiledCR3 ; free memory used for tiled ; CR3
dec _MpCount ; one less mov eax, 1 ; return TRUE
snp_exit: pop ebx pop edi pop esi mov esp, ebp pop ebp stdRET _HalStartNextProcessor
stdENDP _HalStartNextProcessor
_TEXT ends ; end 32 bit code
_TEXT16 SEGMENT DWORD PUBLIC USE16 'CODE' ; start 16 bit code
;++;; VOID; StartPx_RMStub;; Routine Description:;; When a new processor is started, it starts in real-mode and is; sent to a copy of this function which has been copied into low memory.; (below 1m and accessable from real-mode).;; Once CR0 has been set, this function jmp's to a StartPx_PMStub;; Arguments:; none;; Return Value:; does not return, jumps to StartPx_PMStub;;--cPublicProc StartPx_RMStub ,0 cli
db 066h ; load the GDT lgdt fword ptr cs:[SPx_PB.PsSpecialRegisters.SrGdtr]
db 066h ; load the IDT lidt fword ptr cs:[SPx_PB.PsSpecialRegisters.SrIdtr]
mov eax, cs:[SPx_TiledCR3] mov cr3, eax
mov ebp, dword ptr cs:[SPx_P0EBP] mov ecx, dword ptr cs:[SPx_PB.PsContextFrame.CsSegDs] mov ebx, dword ptr cs:[SPx_PB.PsSpecialRegisters.SrCr3] mov eax, dword ptr cs:[SPx_PB.PsSpecialRegisters.SrCr0]
mov cr0, eax ; into prot mode
db 066h db 0eah ; reload cs:eipSPrxPMStub dd 0SPrxFlatCS dw 0
StartPx_RMStub_Len equ $ - StartPx_RMStubstdENDP StartPx_RMStub
_TEXT16 ends ; End 16 bit code
_TEXT SEGMENT ; Start 32 bit code
;++;; VOID; StartPx_PMStub;; Routine Description:;; This function completes the processor's state loading, and signals; the requesting processor that the state has been loaded.;; Arguments:; ebx - requested CR3 for this processors_state; cx - requested ds for this processors_state; ebp - EBP of P0;; Return Value:; does not return - completes the loading of the processors_state;;-- align 16 ; to make sure we don't cross a page boundry ; before reloading CR3
cPublicProc _StartPx_PMStub ,0
; process is now in the load image copy of this function. ; (ie, it's not the low memory copy)
mov cr3, ebx ; get real CR3 mov ds, cx ; set real ds
lea esi, PxFrame.SPx_PB.PsSpecialRegisters
lldt word ptr ds:[esi].SrLdtr ; load ldtr ltr word ptr ds:[esi].SrTr ; load tss
lea edi, PxFrame.SPx_PB.PsContextFrame mov es, word ptr ds:[edi].CsSegEs ; Set other selectors mov fs, word ptr ds:[edi].CsSegFs mov gs, word ptr ds:[edi].CsSegGs mov ss, word ptr ds:[edi].CsSegSs
add esi, SrKernelDr0 .errnz (SrKernelDr1 - SrKernelDr0 - 1 * 4) .errnz (SrKernelDr2 - SrKernelDr0 - 2 * 4) .errnz (SrKernelDr3 - SrKernelDr0 - 3 * 4) .errnz (SrKernelDr6 - SrKernelDr0 - 4 * 4) .errnz (SrKernelDr7 - SrKernelDr0 - 5 * 4) lodsd mov dr0, eax ; load dr0-dr7 lodsd mov dr1, eax lodsd mov dr2, eax lodsd mov dr3, eax lodsd mov dr6, eax lodsd mov dr7, eax
mov esp, dword ptr ds:[edi].CsEsp mov esi, dword ptr ds:[edi].CsEsi mov ecx, dword ptr ds:[edi].CsEcx
push dword ptr ds:[edi].CsEflags popfd ; load eflags
push dword ptr ds:[edi].CsEip ; make a copy of remaining push dword ptr ds:[edi].CsEax ; registers which need push dword ptr ds:[edi].CsEbx ; loaded push dword ptr ds:[edi].CsEdx push dword ptr ds:[edi].CsEdi push dword ptr ds:[edi].CsEbp
cmp _SpType, SMP_SYSPRO2 ; Don't send old SP je short spxpm01 ; style Cache on enable
; eax, ebx, edx are still free mov edx, [PxFrame.SPx_ControlPort] ; our control port in al, dx ; Get register and al, NOT INTDIS ; allow PINTs on this proc or al, CACHEON ; turn cache on out dx, alspxpm01: inc [PxFrame.SPx_flag] ; Signal p0 that we are ; done with it's data ; Set remaining registers pop ebp pop edi pop edx pop ebx pop eax stdRET _StartPx_PMStub ; Set eip
stdENDP _StartPx_PMStub
_TEXT ends ; end 32 bit code end
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