Firebee/FireBee_SVN
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mine is nicer ;)

Browse Source
This commit is contained in:
Markus Fröschle
2012-10-14 21:12:03 +00:00
parent 838e960ee2
commit 5233d61cd7
1 changed files with 41 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
BaS_GNU/BaS_GNU/sources/startcf.c
View File

@@ -2,40 +2,52 @@
void startup(void)
{
__asm__ __volatile__ ("\n\t"
asm volatile(
" .extern _initialize_hardware\n\t"
"bra.s warmstart\n\t"
"jmp ___BOOT_FLASH + 8 | ist zugleich reset vector\n\t"
"| disable interrupts\n\t"
" bra warmstart\n\t"
" jmp ___BOOT_FLASH + 8" /* that's also our reset vector */
/* disable interrupts */
"warmstart:\n\t"
"| disable interrupts\n\t"
" move.w #0x2700,sr\n\t"
: : : "memory");
/* output */ :
/* input */ :
/* clobber */ : "d0");
/* Initialize MBAR */
__asm__ __volatile__ ("MOVE.L #__MBAR,D0\n\t" : : : "memory");
__asm__ __volatile__ ("MOVEC D0,MBAR\n\t" : : : "memory");
__asm__ __volatile__ ("MOVE.L D0,_rt_mbar\n\t" : : : "memory");
asm volatile(
" MOVE.L #__MBAR,D0\n\t"
" MOVEC D0,MBAR\n\t"
" MOVE.L D0,_rt_mbar\n\t"
/* output */ :
/* input */ :
/* clobber */ : "d0");
/* mmu off */
__asm__ __volatile__ ("move.l #__MMUBAR+1,d0\n\t" : : : "memory");
__asm__ __volatile__ ("movec d0,MMUBAR" : : : "memory"); /* set mmubar */
asm volatile(
" move.l #__MMUBAR+1,d0\n\t"
" movec d0,MMUBAR\n\t"
/* output */ :
/* input */ :
/* clobber */ : "d0");
MCF_MMU_MMUCR = 0L; /* MMU off */
__asm__ __volatile__ (
"|/* Initialize RAMBARs: locate SRAM and validate it */\n\t"
asm volatile(
/* Initialize RAMBARs: locate SRAM and validate it */
" move.l #__RAMBAR0 + 0x7,d0\n\t | supervisor only"
" movec d0,RAMBAR0\n\t"
" move.l #__RAMBAR1 + 0x1,d0\n\t"""
" movec d0,RAMBAR1\n\t"
"| STACKPOINTER AUF ENDE SRAM1\n\t"
/* set stack pointer to end of SRAM1 */
" lea __SUP_SP,a7\n\t"
"| instruction cache on\n\t"
/* instruction cache on */
" move.l #0x000C8100,d0\n\t"
" movec d0,cacr\n\t"
" nop\n\t"
"| initialize any hardware specific issues\n\t"
/* initialize any hardware specific issues */
" bra _initialize_hardware\n\t"
: : : "memory");
/* output */ :
/* input */ :
/* clobber */ : "d0");
}