cpu/mpc8xx/start.S

11  *  The processor starts at 0x00000100 and the code is executed
21  *  address and (s)dram will be positioned at address 0
64 	.long	0x27051956		/* U-Boot Magic Number			*/
67 	.ascii U_BOOT_VERSION_STRING, "\0"
138 	li	r2, 0x0007
159 	ori	r4, r4, (0x2000 - 4)
160 	li	r0, (0x2000 / 4)
162 	li	r0, 0
187 	STD_EXCEPTION(0x200, MachineCheck, MachineCheckException)
190 	STD_EXCEPTION(0x300, DataStorage, UnknownException)
193 	STD_EXCEPTION(0x400, InstStorage, UnknownException)
196 	STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt)
199 	. = 0x600
210 	. = 0x700
219 	STD_EXCEPTION(0x800, FPUnavailable, UnknownException)
224 	STD_EXCEPTION(0x900, Decrementer, timer_interrupt)
225 	STD_EXCEPTION(0xa00, Trap_0a, UnknownException)
226 	STD_EXCEPTION(0xb00, Trap_0b, UnknownException)
227 	STD_EXCEPTION(0xc00, SystemCall, UnknownException)
228 	STD_EXCEPTION(0xd00, SingleStep, UnknownException)
230 	STD_EXCEPTION(0xe00, Trap_0e, UnknownException)
231 	STD_EXCEPTION(0xf00, Trap_0f, UnknownException)
236 	STD_EXCEPTION(0x1000, SoftEmu, SoftEmuException)
238 	STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException)
239 	STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException)
240 	STD_EXCEPTION(0x1300, InstructionTLBError, UnknownException)
241 	STD_EXCEPTION(0x1400, DataTLBError, UnknownException)
243 	STD_EXCEPTION(0x1500, Reserved5, UnknownException)
244 	STD_EXCEPTION(0x1600, Reserved6, UnknownException)
245 	STD_EXCEPTION(0x1700, Reserved7, UnknownException)
246 	STD_EXCEPTION(0x1800, Reserved8, UnknownException)
247 	STD_EXCEPTION(0x1900, Reserved9, UnknownException)
248 	STD_EXCEPTION(0x1a00, ReservedA, UnknownException)
249 	STD_EXCEPTION(0x1b00, ReservedB, UnknownException)
251 	STD_EXCEPTION(0x1c00, DataBreakpoint, UnknownException)
252 	STD_EXCEPTION(0x1d00, InstructionBreakpoint, DebugException)
253 	STD_EXCEPTION(0x1e00, PeripheralBreakpoint, UnknownException)
254 	STD_EXCEPTION(0x1f00, DevPortBreakpoint, UnknownException)
261 	. = 0x2000
279 	andi.	r24,r23,0x3f00		/* get vector offset */
281 	li	r22,0
284 	lwz	r24,0(r23)		/* virtual address of handler */
294 	li	r4,0
307 	mtcrf	0xFF,r0
371 	beq	7f		/* Protect against 0 count		*/
393 4:	cmpwi	r6,0
399 5:	dcbst	0,r4
405 6:	icbi	0,r4
424 	 * Relocation Function, r12 point to got2+0x8000
426 	 * Adjust got2 pointers, no need to check for 0, this code
436 	cmpwi	r0,0
439 	stw	r0,0(r3)
448 	cmpwi	r0,0
454 	cmpwi	r0,0
456 	stw	r4,0(r3)
458 	stw	r0,0(r4)
468 	cmplw	0, r3, r4
471 	li	r0, 0
473 	stw	r0, 0(r3)
475 	cmplw	0, r3, r4
496 	li	r9, 0x100		/* reset vector always at 0x100 */
498 	cmplw	0, r7, r8
501 	lwz	r0, 0(r7)
502 	stw	r0, 0(r9)
505 	cmplw	0, r7, r8
515 	addi	r7, r7, 0x100		/* next exception vector	*/
516 	cmplw	0, r7, r8
529 	addi	r7, r7, 0x100		/* next exception vector	*/
530 	cmplw	0, r7, r8
537 	addi	r7, r7, 0x100		/* next exception vector	*/
538 	cmplw	0, r7, r8