/* $Id: swift.S,v 1.7 2000/07/16 21:48:52 anton Exp $ * swift.S: MicroSparc-II mmu/cache operations. * * Copyright (C) 1999 David S. Miller (davem@redhat.com) */#include <linux/config.h>#include <asm/psr.h>#include <asm/asi.h>#include <asm/page.h>#include <asm/pgtsrmmu.h>#include <asm/asm_offsets.h>	.text	.align	4#if 1	/* XXX screw this, I can't get the VAC flushes working	 * XXX reliably... -DaveM	 */	.globl	swift_flush_cache_all, swift_flush_cache_mm	.globl	swift_flush_cache_range, swift_flush_cache_page	.globl	swift_flush_page_for_dma	.globl	swift_flush_page_to_ramswift_flush_cache_all:swift_flush_cache_mm:swift_flush_cache_range:swift_flush_cache_page:swift_flush_page_for_dma:swift_flush_page_to_ram:	sethi	%hi(0x2000), %o01:	subcc	%o0, 0x10, %o0	add	%o0, %o0, %o1	sta	%g0, [%o0] ASI_M_DATAC_TAG	bne	1b	 sta	%g0, [%o1] ASI_M_TXTC_TAG	retl	 nop#else	.globl	swift_flush_cache_allswift_flush_cache_all:	WINDOW_FLUSH(%g4, %g5)	/* Just clear out all the tags. */	sethi	%hi(16 * 1024), %o01:	subcc	%o0, 16, %o0	sta	%g0, [%o0] ASI_M_TXTC_TAG	bne	1b	 sta	%g0, [%o0] ASI_M_DATAC_TAG	retl	 nop	.globl	swift_flush_cache_mmswift_flush_cache_mm:#ifndef CONFIG_SMP	ld	[%o0 + AOFF_mm_context], %g2	cmp	%g2, -1	be	swift_flush_cache_mm_out#endif	WINDOW_FLUSH(%g4, %g5)	rd	%psr, %g1	andn	%g1, PSR_ET, %g3	wr	%g3, 0x0, %psr	nop	nop	mov	SRMMU_CTX_REG, %g7	lda	[%g7] ASI_M_MMUREGS, %g5	sta	%g2, [%g7] ASI_M_MMUREGS#if 1	sethi	%hi(0x2000), %o01:	subcc	%o0, 0x10, %o0	sta	%g0, [%o0] ASI_M_FLUSH_CTX	bne	1b	 nop#else	clr	%o0	or	%g0, 2048, %g7	or	%g0, 2048, %o1	add	%o1, 2048, %o2	add	%o2, 2048, %o3	mov	16, %o4	add	%o4, 2048, %o5	add	%o5, 2048, %g2	add	%g2, 2048, %g31:	sta	%g0, [%o0      ] ASI_M_FLUSH_CTX	sta	%g0, [%o0 + %o1] ASI_M_FLUSH_CTX	sta	%g0, [%o0 + %o2] ASI_M_FLUSH_CTX	sta	%g0, [%o0 + %o3] ASI_M_FLUSH_CTX	sta	%g0, [%o0 + %o4] ASI_M_FLUSH_CTX	sta	%g0, [%o0 + %o5] ASI_M_FLUSH_CTX	sta	%g0, [%o0 + %g2] ASI_M_FLUSH_CTX	sta	%g0, [%o0 + %g3] ASI_M_FLUSH_CTX	subcc	%g7, 32, %g7	bne	1b	 add	%o0, 32, %o0#endif	mov	SRMMU_CTX_REG, %g7	sta	%g5, [%g7] ASI_M_MMUREGS	wr	%g1, 0x0, %psr	nop	nopswift_flush_cache_mm_out:	retl	 nop	.globl	swift_flush_cache_rangeswift_flush_cache_range:	sub	%o2, %o1, %o2	sethi	%hi(4096), %o3	cmp	%o2, %o3	bgu	swift_flush_cache_mm	 nop	b	70f	 nop	.globl	swift_flush_cache_pageswift_flush_cache_page:	ld	[%o0 + 0x0], %o0		/* XXX vma->vm_mm, GROSS XXX */70:#ifndef CONFIG_SMP	ld	[%o0 + AOFF_mm_context], %g2	cmp	%g2, -1	be	swift_flush_cache_page_out#endif	WINDOW_FLUSH(%g4, %g5)	rd	%psr, %g1	andn	%g1, PSR_ET, %g3	wr	%g3, 0x0, %psr	nop	nop	mov	SRMMU_CTX_REG, %g7	lda	[%g7] ASI_M_MMUREGS, %g5	sta	%g2, [%g7] ASI_M_MMUREGS	andn	%o1, (PAGE_SIZE - 1), %o1#if 1	sethi	%hi(0x1000), %o01:	subcc	%o0, 0x10, %o0	sta	%g0, [%o1 + %o0] ASI_M_FLUSH_PAGE	bne	1b	 nop#else	or	%g0, 512, %g7	or	%g0, 512, %o0	add	%o0, 512, %o2	add	%o2, 512, %o3	add	%o3, 512, %o4	add	%o4, 512, %o5	add	%o5, 512, %g3	add	%g3, 512, %g41:	sta	%g0, [%o1      ] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %o0] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %o2] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %o3] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %o4] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %o5] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %g3] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %g4] ASI_M_FLUSH_PAGE	subcc	%g7, 16, %g7	bne	1b	 add	%o1, 16, %o1#endif	mov	SRMMU_CTX_REG, %g7	sta	%g5, [%g7] ASI_M_MMUREGS	wr	%g1, 0x0, %psr	nop	nopswift_flush_cache_page_out:	retl	 nop	/* Swift is write-thru, however it is not	 * I/O nor TLB-walk coherent.  Also it has	 * caches which are virtually indexed and tagged.	 */	.globl	swift_flush_page_for_dma	.globl	swift_flush_page_to_ramswift_flush_page_for_dma:swift_flush_page_to_ram:	andn	%o0, (PAGE_SIZE - 1), %o1#if 1	sethi	%hi(0x1000), %o01:	subcc	%o0, 0x10, %o0	sta	%g0, [%o1 + %o0] ASI_M_FLUSH_PAGE	bne	1b	 nop#else	or	%g0, 512, %g7	or	%g0, 512, %o0	add	%o0, 512, %o2	add	%o2, 512, %o3	add	%o3, 512, %o4	add	%o4, 512, %o5	add	%o5, 512, %g3	add	%g3, 512, %g41:	sta	%g0, [%o1      ] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %o0] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %o2] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %o3] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %o4] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %o5] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %g3] ASI_M_FLUSH_PAGE	sta	%g0, [%o1 + %g4] ASI_M_FLUSH_PAGE	subcc	%g7, 16, %g7	bne	1b	 add	%o1, 16, %o1#endif	retl	 nop#endif	.globl	swift_flush_sig_insnsswift_flush_sig_insns:	flush	%o1	retl	 flush	%o1 + 4	.globl	swift_flush_tlb_mm	.globl	swift_flush_tlb_range	.globl	swift_flush_tlb_allswift_flush_tlb_mm:swift_flush_tlb_range:#ifndef CONFIG_SMP	ld	[%o0 + AOFF_mm_context], %g2	cmp	%g2, -1	be	swift_flush_tlb_all_out#endifswift_flush_tlb_all:	mov	0x400, %o1	sta	%g0, [%o1] ASI_M_FLUSH_PROBEswift_flush_tlb_all_out:	retl	 nop	.globl	swift_flush_tlb_pageswift_flush_tlb_page:	ld	[%o0 + 0x00], %o0	/* XXX vma->vm_mm GROSS XXX */	mov	SRMMU_CTX_REG, %g1	ld	[%o0 + AOFF_mm_context], %o3	andn	%o1, (PAGE_SIZE - 1), %o1#ifndef CONFIG_SMP	cmp	%o3, -1	be	swift_flush_tlb_page_out	 nop#endif#if 1	mov	0x400, %o1	sta	%g0, [%o1] ASI_M_FLUSH_PROBE	#else	lda	[%g1] ASI_M_MMUREGS, %g5	sta	%o3, [%g1] ASI_M_MMUREGS	sta	%g0, [%o1] ASI_M_FLUSH_PAGE	/* rem. virt. cache. prot. */	sta	%g0, [%o1] ASI_M_FLUSH_PROBE	sta	%g5, [%g1] ASI_M_MMUREGS#endifswift_flush_tlb_page_out:	retl	 nop