mirror of
https://github.com/Zeal-Operating-System/ZealOS.git
synced 2024-12-28 08:16:31 +00:00
110 lines
2.5 KiB
HolyC
Executable file
110 lines
2.5 KiB
HolyC
Executable file
asm {
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USE64
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BTS U32 [SYS_RUN_LEVEL],RLf_64BIT
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//Set required bits for SSE instruction execution
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MOV_RAX_CR4
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BTS RAX,CR4f_OSFXSR
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MOV_CR4_RAX
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MOV_EAX_CR0
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BTR RAX,CR0f_EM
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BTR RAX,CR0f_MP
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BTS RAX,CR0f_NE
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MOV_CR0_EAX
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FNINIT
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MOV RAX,SYS_FIXED_AREA+CSysFixedArea.init_fpu_mmx
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FXSAVE U64 [RAX]
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//Init CPU0 Struct
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PUSH SYS_FIXED_AREA+CSysFixedArea.zenith
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PUSH SYS_FIXED_AREA+CSysFixedArea.boot_cpu
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PUSH 0
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CALL &CPUStructInit
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CALL SET_GS_BASE
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//Init Zenith HeapCtrl
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MOV EDI,U32 SYS_FIXED_AREA+CSysFixedArea.zenith_hc
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MOV EAX,U32 SYS_FIXED_AREA+CSysFixedArea.sys_code_bp
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MOV U64 CHeapCtrl.bp[RDI],RAX
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MOV U32 CHeapCtrl.hc_signature[RDI],HEAP_CTRL_SIGNATURE_VAL
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LEA RAX,U64 CHeapCtrl.next_um-CMemUsed.next[RDI]
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MOV U64 CHeapCtrl.next_um[RDI],RAX
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MOV U64 CHeapCtrl.last_um[RDI],RAX
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MOV EAX,U32 SYS_FIXED_AREA+CSysFixedArea.zenith
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MOV U64 CHeapCtrl.mem_task[RDI],RAX
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MOV U64 CTask.code_heap[RAX],RDI
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MOV U64 CTask.data_heap[RAX],RDI
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MOV U32 CTask.task_signature[RAX],TASK_SIGNATURE_VAL
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BTS U32 [SYS_RUN_LEVEL],RLf_16MEG_ZENITH_HEAP_CTRL
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PUSH MEM_ZENITH_STACK
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PUSH U32 SYS_FIXED_AREA+CSysFixedArea.zenith
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CALL &TaskInit
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CALL SET_FS_BASE
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MOV RSP,U64 CTask.rsp[RAX]
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JMP I32 &KMain
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//************************************
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USE32
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SYS_ENTER_LONG_MODE:: //Switch to long 64-bit mode
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MOV_EAX_CR4
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OR EAX, CR4F_PAE | CR4F_PGE
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MOV_CR4_EAX
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MOV EAX,[MEM_PML4]
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MOV_CR3_EAX
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MOV ECX,IA32_EFER
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XOR EDX,EDX
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MOV EAX,IA32F_LME
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WRMSR
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MOV_EAX_CR0
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BTS EAX,31 //Enable paging (required for 64-bit mode)
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MOV_CR0_EAX
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DU8 0xEA; //JMP CGDT.cs64:@@05
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DU32 @@05;
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DU16 CGDT.cs64;
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USE64
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@@05: MOV AX,CGDT.ds
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MOV DS,AX
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MOV ES,AX
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MOV SS,AX
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MOV FS,AX
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MOV GS,AX
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RET
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//************************************
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SYS_RAM_REBOOT:: //This gets copied high. $LK,"SYS_RAM_REBOOT",A="FF:::/Zenith/Boot/BootRAM.CC,SYS_RAM_REBOOT:2"$
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PUSH U32 CGDT.ds //stack seg
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PUSH U32 BOOT_RAM_LIMIT //stack
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PUSH U32 0 //flags
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PUSH U32 CGDT.cs32
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LEA RAX,[@@10]
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PUSH RAX
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IRET
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USE32
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@@10: WBINVD
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//Disable paging
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MOV_EAX_CR0
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BTR EAX,31
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MOV_CR0_EAX
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MOV ECX,IA32_EFER
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XOR EDX,EDX
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XOR EAX,EAX
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WRMSR
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MOV EBX,BOOT_SRC_RAM
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MOV EAX,I32 CORE0_32BIT_INIT
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JMP EAX
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SYS_RAM_REBOOT_END::
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USE64
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}
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