powerpc/kernel/head_8xx.S

36 #if CONFIG_TASK_SIZE <= 0x80000000 && CONFIG_PAGE_OFFSET >= 0x80000000
37 /* By simply checking Address >= 0x80000000, we know if its a kernel address */
40 	rlwinm	\scratch, \addr, 16, 0xfff8
59 #define RPN_PATTERN	0x00f0
73  *   r4: initrd_start or if no initrd then 0
74  *   r5: initrd_end - unused if r4 is 0
131 	EXCEPTION(0x100, Reset, system_reset_exception, EXC_XFER_STD)
134 	. = 0x200
141 	EXC_XFER_STD(0x200, machine_check_exception)
144 	EXCEPTION(0x500, HardwareInterrupt, do_IRQ, EXC_XFER_LITE)
147 	. = 0x600
157 	EXCEPTION(0x700, ProgramCheck, program_check_exception, EXC_XFER_STD)
160 	EXCEPTION(0x900, Decrementer, timer_interrupt, EXC_XFER_LITE)
162 	/* With VMAP_STACK there's not enough room for this at 0x600 */
163 	. = 0xa00
165 	EXC_XFER_STD(0x600, alignment_exception)
168 	. = 0xc00
170 	SYSCALL_ENTRY	0xc00
173 	EXCEPTION(0xd00, SingleStep, single_step_exception, EXC_XFER_STD)
178 	EXCEPTION(0x1000, SoftEmu, program_check_exception, EXC_XFER_STD)
180 	. = 0x1100
220 	rlwinm	r10, r10, 0, 20, 31
228 	lwz	r10, 0(r10)	/* Get the pte */
229 	rlwimi	r11, r10, 0, _PAGE_GUARDED | _PAGE_ACCESSED
238 	rlwinm	r10, r10, 0, ~0x0f00	/* Clear bits 20-23 */
239 	rlwimi	r10, r10, 4, 0x0400	/* Copy _PAGE_EXEC into bit 21 */
240 	ori	r10, r10, RPN_PATTERN | 0x200 /* Set 22 and 24-27 */
244 0:	mfspr	r10, SPRN_SPRG_SCRATCH0
247 	patch_site	0b, patch__itlbmiss_exit_1
250 	patch_site	0f, patch__itlbmiss_perf
251 0:	lwz	r10, (itlb_miss_counter - PAGE_OFFSET)@l(0)
253 	stw	r10, (itlb_miss_counter - PAGE_OFFSET)@l(0)
259 	. = 0x1200
272 	rlwinm	r10, r10, 0, 20, 31
280 	lwz	r10, 0(r10)	/* Get the pte */
288 	rlwimi	r11, r10, 0, _PAGE_GUARDED | _PAGE_ACCESSED
298 	rlwimi	r10, r11, 0, 24, 27	/* Set 24-27 */
303 0:	mfspr	r10, SPRN_DAR
307 	patch_site	0b, patch__dtlbmiss_exit_1
310 	patch_site	0f, patch__dtlbmiss_perf
311 0:	lwz	r10, (dtlb_miss_counter - PAGE_OFFSET)@l(0)
313 	stw	r10, (dtlb_miss_counter - PAGE_OFFSET)@l(0)
324 	. = 0x1300
332 	/* 0x400 is InstructionAccess exception, needed by bad_page_fault() */
335 	EXC_XFER_LITE(0x400, handle_page_fault)
341 	. = 0x1400
363 	/* 0x300 is DataAccess exception, needed by bad_page_fault() */
364 	EXC_XFER_LITE(0x300, handle_page_fault)
384 	EXC_XFER_STD(0x1c00, do_break)
386 	. = 0x1c00
400 	. = 0x1d00
403 	lwz	r10, (instruction_counter - PAGE_OFFSET)@l(0)
405 	stw	r10, (instruction_counter - PAGE_OFFSET)@l(0)
406 	lis	r10, 0xffff
407 	ori	r10, r10, 0x01
412 	EXCEPTION(0x1d00, Trap_1d, unknown_exception, EXC_XFER_STD)
414 	EXCEPTION(0x1e00, Trap_1e, unknown_exception, EXC_XFER_STD)
415 	EXCEPTION(0x1f00, Trap_1f, unknown_exception, EXC_XFER_STD)
417 	. = 0x2000
428 	rlwinm	r11, r10, 16, 0xfff8
436 	rlwinm	r11, r11, 0, 20, 31
441 	mtcrf	0x01, r11
443 	lwz	r11, 0(r11)	/* Get the pte */
446 	rlwimi	r11, r10, 0, 32 - PAGE_SHIFT, 31
447 201:	lwz	r11,0(r11)
451 	xoris	r10, r11, 0x7c00	/* check if major OP code is 31 */
452 	rlwinm	r10, r10, 0, 21, 5
468 	rlwimi	r11, r10, 0, 32 - PAGE_SHIFT_8M, 31
472 	rlwinm	r10, r10,0,7,5	/* Clear store bit for buggy dcbst insn */
517 	cmpwi	cr1, r11, 0
521 	rlwinm	r11,r11,0,16,10		/* make sure we don't execute this more than once */
565 	stw	r0, 0(r1)
566 	li	r0,0
581 	li	r3,0
607 	oris	r0, r0, 0x1f00
615 	rlwinm	r0, r0, 0, 0xfff80000
616 	ori	r0, r0, 0xf0 | _PAGE_DIRTY | _PAGE_SPS | _PAGE_SH | \
623 	li	r0, 0
637 	stw	r5, 0xf0(0)	/* Must match your Abatron config file */
641 	stw	r6, 0(r5)
660 	li	r8, 0
676 	ori	r8, r8, 0x1c00
678 	ori	r12, r12, 0x1c00
683 	li	r11, MI_BOOTINIT		/* Create RPN for address 0 */
686 	addi	r8, r8, 0x100
692 	addi	r12, r12, 0x100
696 	addis	r9, r9, 0x80
697 	addis	r11, r11, 0x80
714 	rlwinm	r8, r8, 0, ~0xc
716 	rlwinm	r8, r8, 0, ~0x8
728 	rlwinm	r0, r10, 0, ~MSR_RI
729 	rlwinm	r0, r0, 0, ~MSR_EE
737 	li	r5, 0
747 	LOAD_REG_IMMEDIATE(r8, 0xf0 | _PAGE_RO | _PAGE_SPS | _PAGE_SH | _PAGE_PRESENT)
757 	addi	r5, r5, 0x100
775 	cmpwi	r4, 0
777 	LOAD_REG_IMMEDIATE(r8, 0xf0 | _PAGE_RO | _PAGE_SPS | _PAGE_SH | _PAGE_PRESENT)
785 	addi	r5, r5, 0x100
791 4:	LOAD_REG_IMMEDIATE(r8, 0xf0 | _PAGE_SPS | _PAGE_SH | _PAGE_PRESENT)
797 	addi	r5, r5, 0x100
807 	rlwinm	r8, r8, 0, 0xfff80000
808 	ori	r8, r8, 0xf0 | _PAGE_DIRTY | _PAGE_SPS | _PAGE_SH | \