42 lines
982 B
C
42 lines
982 B
C
#include <MCF5475.h>
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void startup(void)
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{
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asm("\n\t"
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".extern _initialize_hardware\n\t"
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"bra.s warmstart\n\t"
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"jmp ___BOOT_FLASH + 8 | ist zugleich reset vector\n\t"
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"| disable interrupts\n\t"
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"warmstart:\n\t"
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"| disable interrupts\n\t"
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"move.w #0x2700,sr\n\t"
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);
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/* Initialize MBAR */
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asm("MOVE.L #__MBAR,D0\n\t");
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asm("MOVEC D0,MBAR\n\t");
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asm("MOVE.L D0,_rt_mbar\n\t");
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/* mmu off */
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asm("move.l #__MMUBAR+1,d0\n\t");
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asm("movec d0,MMUBAR"); /* set mmubar */
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MCF_MMU_MMUCR = 0L; /* MMU off */
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asm(
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"|/* Initialize RAMBARs: locate SRAM and validate it */\n\t"
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"move.l #__RAMBAR0 + 0x7,d0\n\t | supervisor only"
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"movec d0,RAMBAR0\n\t"
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"move.l #__RAMBAR1 + 0x1,d0\n\t"""
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"movec d0,RAMBAR1\n\t"
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"| STACKPOINTER AUF ENDE SRAM1\n\t"
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"lea __SUP_SP,a7\n\t"
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"| instruction cache on\n\t"
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"move.l #0x000C8100,d0\n\t"
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"movec d0,cacr\n\t"
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"nop\n\t"
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"| initialize any hardware specific issues\n\t"
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"bra _initialize_hardware\n\t"
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);
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}
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