2410slibrary.s

来自「ARM9-2410的LED灯点亮码源」· S 代码 · 共 28 行

NOINT EQU 0xc0
	CODE32
	AREA SLIB,CODE,READONLY
	ENTRY

R1_I EQU (1 :SHL: 12)
R1_C EQU (1 :SHL: 2)
R1_A EQU (1 :SHL: 1)
R1_M EQU (1)
R1_iA EQU (1 :SHL: 31)
R1_nF EQU (1 :SHL: 30)


	EXPORT    MMU_SetFastBusMode
MMU_SetFastBusMode
   mrc p15,0,r0,c1,c0,0
   bic r0,r0,#R1_iA|R1_nF
   mcr p15,0,r0,c1,c0,0
   MOV PC,LR

	EXPORT    MMU_SetAsyncBusMode
MMU_SetAsyncBusMode
   mrc p15,0,r0,c1,c0,0
   orr r0,r0,#R1_nF|R1_iA
   mcr p15,0,r0,c1,c0,0
   MOV PC,LR   
   
   END