sparc32: Move cache and TLB flushes over to method ops.

This eliminated most of the remaining users of btfixup.

There are some complications because of the special cases we
have for sun4d, leon, and some flavors of viking.

It was found that there are no cases where a flush_page_for_dma
method was not hooked up to something, so the "noflush" iommu
methods were removed.

Add some documentation to the viking_sun4d_smp_ops to describe exactly
the hardware bug which causes us to need special TLB flushing on
sun4d.

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 366 insertions, 217 deletions

diff --git a/arch/sparc/mm/btfixup.c b/arch/sparc/mm/btfixup.c
index 1b7aa565497e..dcbb7ffcc82e 100644
--- a/arch/sparc/mm/btfixup.c
+++ b/arch/sparc/mm/btfixup.c
@@ -38,7 +38,6 @@ static char insn_s[] __initdata = "Fixup s %p doesn't refer to an OR at %p[%08x]
 static char insn_h[] __initdata = "Fixup h %p doesn't refer to a SETHI at %p[%08x]\n";
 static char insn_a[] __initdata = "Fixup a %p doesn't refer to a SETHI nor OR at %p[%08x]\n";
 static char insn_i[] __initdata = "Fixup i %p doesn't refer to a valid instruction at %p[%08x]\n";
-static char fca_und[] __initdata = "flush_cache_all undefined in btfixup()\n";
 static char wrong_setaddr[] __initdata = "Garbled CALL/INT patch at %p[%08x,%08x,%08x]=%08x\n";
 
 #ifdef BTFIXUP_OPTIMIZE_OTHER
@@ -75,7 +74,6 @@ void __init btfixup(void)
 	unsigned insn;
 	unsigned *addr;
 	int fmangled = 0;
-	void (*flush_cacheall)(void);
 	
 	if (!visited) {
 		visited++;
@@ -311,13 +309,8 @@ void __init btfixup(void)
 			p = q + count;
 	}
 #ifdef CONFIG_SMP
-	flush_cacheall = (void (*)(void))BTFIXUPVAL_CALL(local_flush_cache_all);
+	local_ops->cache_all();
 #else
-	flush_cacheall = (void (*)(void))BTFIXUPVAL_CALL(flush_cache_all);
+	sparc32_cachetlb_ops->cache_all();
 #endif
-	if (!flush_cacheall) {
-		prom_printf(fca_und);
-		prom_halt();
-	}
-	(*flush_cacheall)();
 }
diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c
index c64f81e370aa..720bea2c7fdd 100644
--- a/arch/sparc/mm/iommu.c
+++ b/arch/sparc/mm/iommu.c
@@ -39,8 +39,6 @@
 
 /* srmmu.c */
 extern int viking_mxcc_present;
-BTFIXUPDEF_CALL(void, flush_page_for_dma, unsigned long)
-#define flush_page_for_dma(page) BTFIXUP_CALL(flush_page_for_dma)(page)
 extern int flush_page_for_dma_global;
 static int viking_flush;
 /* viking.S */
@@ -216,11 +214,6 @@ static u32 iommu_get_scsi_one(struct device *dev, char *vaddr, unsigned int len)
 	return busa + off;
 }
 
-static __u32 iommu_get_scsi_one_noflush(struct device *dev, char *vaddr, unsigned long len)
-{
-	return iommu_get_scsi_one(dev, vaddr, len);
-}
-
 static __u32 iommu_get_scsi_one_gflush(struct device *dev, char *vaddr, unsigned long len)
 {
 	flush_page_for_dma(0);
@@ -238,19 +231,6 @@ static __u32 iommu_get_scsi_one_pflush(struct device *dev, char *vaddr, unsigned
 	return iommu_get_scsi_one(dev, vaddr, len);
 }
 
-static void iommu_get_scsi_sgl_noflush(struct device *dev, struct scatterlist *sg, int sz)
-{
-	int n;
-
-	while (sz != 0) {
-		--sz;
-		n = (sg->length + sg->offset + PAGE_SIZE-1) >> PAGE_SHIFT;
-		sg->dma_address = iommu_get_one(dev, sg_page(sg), n) + sg->offset;
-		sg->dma_length = sg->length;
-		sg = sg_next(sg);
-	}
-}
-
 static void iommu_get_scsi_sgl_gflush(struct device *dev, struct scatterlist *sg, int sz)
 {
 	int n;
@@ -426,17 +406,6 @@ static void iommu_unmap_dma_area(struct device *dev, unsigned long busa, int len
 }
 #endif
 
-static const struct sparc32_dma_ops iommu_dma_noflush_ops = {
-	.get_scsi_one		= iommu_get_scsi_one_noflush,
-	.get_scsi_sgl		= iommu_get_scsi_sgl_noflush,
-	.release_scsi_one	= iommu_release_scsi_one,
-	.release_scsi_sgl	= iommu_release_scsi_sgl,
-#ifdef CONFIG_SBUS
-	.map_dma_area		= iommu_map_dma_area,
-	.unmap_dma_area		= iommu_unmap_dma_area,
-#endif
-};
-
 static const struct sparc32_dma_ops iommu_dma_gflush_ops = {
 	.get_scsi_one		= iommu_get_scsi_one_gflush,
 	.get_scsi_sgl		= iommu_get_scsi_sgl_gflush,
@@ -461,12 +430,7 @@ static const struct sparc32_dma_ops iommu_dma_pflush_ops = {
 
 void __init ld_mmu_iommu(void)
 {
-	viking_flush = (BTFIXUPVAL_CALL(flush_page_for_dma) == (unsigned long)viking_flush_page);
-
-	if (!BTFIXUPVAL_CALL(flush_page_for_dma)) {
-		/* IO coherent chip */
-		sparc32_dma_ops = &iommu_dma_noflush_ops;
-	} else if (flush_page_for_dma_global) {
+	if (flush_page_for_dma_global) {
 		/* flush_page_for_dma flushes everything, no matter of what page is it */
 		sparc32_dma_ops = &iommu_dma_gflush_ops;
 	} else {
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index dc398e5c71a4..cba05fa3fbc7 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -65,24 +65,20 @@ extern unsigned long last_valid_pfn;
 
 static pgd_t *srmmu_swapper_pg_dir;
 
+const struct sparc32_cachetlb_ops *sparc32_cachetlb_ops;
+
 #ifdef CONFIG_SMP
+const struct sparc32_cachetlb_ops *local_ops;
+
 #define FLUSH_BEGIN(mm)
 #define FLUSH_END
 #else
-#define FLUSH_BEGIN(mm) if((mm)->context != NO_CONTEXT) {
+#define FLUSH_BEGIN(mm) if ((mm)->context != NO_CONTEXT) {
 #define FLUSH_END	}
 #endif
 
-BTFIXUPDEF_CALL(void, flush_page_for_dma, unsigned long)
-#define flush_page_for_dma(page) BTFIXUP_CALL(flush_page_for_dma)(page)
-
 int flush_page_for_dma_global = 1;
 
-#ifdef CONFIG_SMP
-BTFIXUPDEF_CALL(void, local_flush_page_for_dma, unsigned long)
-#define local_flush_page_for_dma(page) BTFIXUP_CALL(local_flush_page_for_dma)(page)
-#endif
-
 char *srmmu_name;
 
 ctxd_t *srmmu_ctx_table_phys;
@@ -1126,7 +1122,7 @@ void __init srmmu_paging_init(void)
 	srmmu_set_ctable_ptr((unsigned long)srmmu_ctx_table_phys);
 #ifdef CONFIG_SMP
 	/* Stop from hanging here... */
-	local_flush_tlb_all();
+	local_ops->tlb_all();
 #else
 	flush_tlb_all();
 #endif
@@ -1284,6 +1280,20 @@ static void __cpuinit poke_hypersparc(void)
 	clear = srmmu_get_fstatus();
 }
 
+static const struct sparc32_cachetlb_ops hypersparc_ops = {
+	.cache_all	= hypersparc_flush_cache_all,
+	.cache_mm	= hypersparc_flush_cache_mm,
+	.cache_page	= hypersparc_flush_cache_page,
+	.cache_range	= hypersparc_flush_cache_range,
+	.tlb_all	= hypersparc_flush_tlb_all,
+	.tlb_mm		= hypersparc_flush_tlb_mm,
+	.tlb_page	= hypersparc_flush_tlb_page,
+	.tlb_range	= hypersparc_flush_tlb_range,
+	.page_to_ram	= hypersparc_flush_page_to_ram,
+	.sig_insns	= hypersparc_flush_sig_insns,
+	.page_for_dma	= hypersparc_flush_page_for_dma,
+};
+
 static void __init init_hypersparc(void)
 {
 	srmmu_name = "ROSS HyperSparc";
@@ -1292,21 +1302,7 @@ static void __init init_hypersparc(void)
 	init_vac_layout();
 
 	is_hypersparc = 1;
-
-	BTFIXUPSET_CALL(flush_cache_all, hypersparc_flush_cache_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_mm, hypersparc_flush_cache_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_range, hypersparc_flush_cache_range, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_page, hypersparc_flush_cache_page, BTFIXUPCALL_NORM);
-
-	BTFIXUPSET_CALL(flush_tlb_all, hypersparc_flush_tlb_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_mm, hypersparc_flush_tlb_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_range, hypersparc_flush_tlb_range, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_page, hypersparc_flush_tlb_page, BTFIXUPCALL_NORM);
-
-	BTFIXUPSET_CALL(__flush_page_to_ram, hypersparc_flush_page_to_ram, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_sig_insns, hypersparc_flush_sig_insns, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_page_for_dma, hypersparc_flush_page_for_dma, BTFIXUPCALL_NOP);
-
+	sparc32_cachetlb_ops = &hypersparc_ops;
 
 	poke_srmmu = poke_hypersparc;
 
@@ -1352,25 +1348,24 @@ static void __cpuinit poke_cypress(void)
 	srmmu_set_mmureg(mreg);
 }
 
+static const struct sparc32_cachetlb_ops cypress_ops = {
+	.cache_all	= cypress_flush_cache_all,
+	.cache_mm	= cypress_flush_cache_mm,
+	.cache_page	= cypress_flush_cache_page,
+	.cache_range	= cypress_flush_cache_range,
+	.tlb_all	= cypress_flush_tlb_all,
+	.tlb_mm		= cypress_flush_tlb_mm,
+	.tlb_page	= cypress_flush_tlb_page,
+	.tlb_range	= cypress_flush_tlb_range,
+	.page_to_ram	= cypress_flush_page_to_ram,
+	.sig_insns	= cypress_flush_sig_insns,
+	.page_for_dma	= cypress_flush_page_for_dma,
+};
+
 static void __init init_cypress_common(void)
 {
 	init_vac_layout();
-
-	BTFIXUPSET_CALL(flush_cache_all, cypress_flush_cache_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_mm, cypress_flush_cache_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_range, cypress_flush_cache_range, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_page, cypress_flush_cache_page, BTFIXUPCALL_NORM);
-
-	BTFIXUPSET_CALL(flush_tlb_all, cypress_flush_tlb_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_mm, cypress_flush_tlb_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_page, cypress_flush_tlb_page, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_range, cypress_flush_tlb_range, BTFIXUPCALL_NORM);
-
-
-	BTFIXUPSET_CALL(__flush_page_to_ram, cypress_flush_page_to_ram, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_sig_insns, cypress_flush_sig_insns, BTFIXUPCALL_NOP);
-	BTFIXUPSET_CALL(flush_page_for_dma, cypress_flush_page_for_dma, BTFIXUPCALL_NOP);
-
+	sparc32_cachetlb_ops = &cypress_ops;
 	poke_srmmu = poke_cypress;
 }
 
@@ -1421,6 +1416,20 @@ static void __cpuinit poke_swift(void)
 	srmmu_set_mmureg(mreg);
 }
 
+static const struct sparc32_cachetlb_ops swift_ops = {
+	.cache_all	= swift_flush_cache_all,
+	.cache_mm	= swift_flush_cache_mm,
+	.cache_page	= swift_flush_cache_page,
+	.cache_range	= swift_flush_cache_range,
+	.tlb_all	= swift_flush_tlb_all,
+	.tlb_mm		= swift_flush_tlb_mm,
+	.tlb_page	= swift_flush_tlb_page,
+	.tlb_range	= swift_flush_tlb_range,
+	.page_to_ram	= swift_flush_page_to_ram,
+	.sig_insns	= swift_flush_sig_insns,
+	.page_for_dma	= swift_flush_page_for_dma,
+};
+
 #define SWIFT_MASKID_ADDR  0x10003018
 static void __init init_swift(void)
 {
@@ -1471,21 +1480,7 @@ static void __init init_swift(void)
 		break;
 	}
 
-	BTFIXUPSET_CALL(flush_cache_all, swift_flush_cache_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_mm, swift_flush_cache_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_page, swift_flush_cache_page, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_range, swift_flush_cache_range, BTFIXUPCALL_NORM);
-
-
-	BTFIXUPSET_CALL(flush_tlb_all, swift_flush_tlb_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_mm, swift_flush_tlb_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_page, swift_flush_tlb_page, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_range, swift_flush_tlb_range, BTFIXUPCALL_NORM);
-
-	BTFIXUPSET_CALL(__flush_page_to_ram, swift_flush_page_to_ram, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_sig_insns, swift_flush_sig_insns, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_page_for_dma, swift_flush_page_for_dma, BTFIXUPCALL_NORM);
-
+	sparc32_cachetlb_ops = &swift_ops;
 	flush_page_for_dma_global = 0;
 
 	/*
@@ -1618,26 +1613,25 @@ static void __cpuinit poke_turbosparc(void)
 	srmmu_set_mmureg(mreg);
 }
 
+static const struct sparc32_cachetlb_ops turbosparc_ops = {
+	.cache_all	= turbosparc_flush_cache_all,
+	.cache_mm	= turbosparc_flush_cache_mm,
+	.cache_page	= turbosparc_flush_cache_page,
+	.cache_range	= turbosparc_flush_cache_range,
+	.tlb_all	= turbosparc_flush_tlb_all,
+	.tlb_mm		= turbosparc_flush_tlb_mm,
+	.tlb_page	= turbosparc_flush_tlb_page,
+	.tlb_range	= turbosparc_flush_tlb_range,
+	.page_to_ram	= turbosparc_flush_page_to_ram,
+	.sig_insns	= turbosparc_flush_sig_insns,
+	.page_for_dma	= turbosparc_flush_page_for_dma,
+};
+
 static void __init init_turbosparc(void)
 {
 	srmmu_name = "Fujitsu TurboSparc";
 	srmmu_modtype = TurboSparc;
-
-	BTFIXUPSET_CALL(flush_cache_all, turbosparc_flush_cache_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_mm, turbosparc_flush_cache_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_page, turbosparc_flush_cache_page, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_range, turbosparc_flush_cache_range, BTFIXUPCALL_NORM);
-
-	BTFIXUPSET_CALL(flush_tlb_all, turbosparc_flush_tlb_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_mm, turbosparc_flush_tlb_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_page, turbosparc_flush_tlb_page, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_range, turbosparc_flush_tlb_range, BTFIXUPCALL_NORM);
-
-	BTFIXUPSET_CALL(__flush_page_to_ram, turbosparc_flush_page_to_ram, BTFIXUPCALL_NORM);
-
-	BTFIXUPSET_CALL(flush_sig_insns, turbosparc_flush_sig_insns, BTFIXUPCALL_NOP);
-	BTFIXUPSET_CALL(flush_page_for_dma, turbosparc_flush_page_for_dma, BTFIXUPCALL_NORM);
-
+	sparc32_cachetlb_ops = &turbosparc_ops;
 	poke_srmmu = poke_turbosparc;
 }
 
@@ -1652,6 +1646,20 @@ static void __cpuinit poke_tsunami(void)
 	srmmu_set_mmureg(mreg);
 }
 
+static const struct sparc32_cachetlb_ops tsunami_ops = {
+	.cache_all	= tsunami_flush_cache_all,
+	.cache_mm	= tsunami_flush_cache_mm,
+	.cache_page	= tsunami_flush_cache_page,
+	.cache_range	= tsunami_flush_cache_range,
+	.tlb_all	= tsunami_flush_tlb_all,
+	.tlb_mm		= tsunami_flush_tlb_mm,
+	.tlb_page	= tsunami_flush_tlb_page,
+	.tlb_range	= tsunami_flush_tlb_range,
+	.page_to_ram	= tsunami_flush_page_to_ram,
+	.sig_insns	= tsunami_flush_sig_insns,
+	.page_for_dma	= tsunami_flush_page_for_dma,
+};
+
 static void __init init_tsunami(void)
 {
 	/*
@@ -1662,22 +1670,7 @@ static void __init init_tsunami(void)
 
 	srmmu_name = "TI Tsunami";
 	srmmu_modtype = Tsunami;
-
-	BTFIXUPSET_CALL(flush_cache_all, tsunami_flush_cache_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_mm, tsunami_flush_cache_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_page, tsunami_flush_cache_page, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_range, tsunami_flush_cache_range, BTFIXUPCALL_NORM);
-
-
-	BTFIXUPSET_CALL(flush_tlb_all, tsunami_flush_tlb_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_mm, tsunami_flush_tlb_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_page, tsunami_flush_tlb_page, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_range, tsunami_flush_tlb_range, BTFIXUPCALL_NORM);
-
-	BTFIXUPSET_CALL(__flush_page_to_ram, tsunami_flush_page_to_ram, BTFIXUPCALL_NOP);
-	BTFIXUPSET_CALL(flush_sig_insns, tsunami_flush_sig_insns, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_page_for_dma, tsunami_flush_page_for_dma, BTFIXUPCALL_NORM);
-
+	sparc32_cachetlb_ops = &tsunami_ops;
 	poke_srmmu = poke_tsunami;
 
 	tsunami_setup_blockops();
@@ -1688,7 +1681,7 @@ static void __cpuinit poke_viking(void)
 	unsigned long mreg = srmmu_get_mmureg();
 	static int smp_catch;
 
-	if(viking_mxcc_present) {
+	if (viking_mxcc_present) {
 		unsigned long mxcc_control = mxcc_get_creg();
 
 		mxcc_control |= (MXCC_CTL_ECE | MXCC_CTL_PRE | MXCC_CTL_MCE);
@@ -1725,6 +1718,52 @@ static void __cpuinit poke_viking(void)
 	srmmu_set_mmureg(mreg);
 }
 
+static struct sparc32_cachetlb_ops viking_ops = {
+	.cache_all	= viking_flush_cache_all,
+	.cache_mm	= viking_flush_cache_mm,
+	.cache_page	= viking_flush_cache_page,
+	.cache_range	= viking_flush_cache_range,
+	.tlb_all	= viking_flush_tlb_all,
+	.tlb_mm		= viking_flush_tlb_mm,
+	.tlb_page	= viking_flush_tlb_page,
+	.tlb_range	= viking_flush_tlb_range,
+	.page_to_ram	= viking_flush_page_to_ram,
+	.sig_insns	= viking_flush_sig_insns,
+	.page_for_dma	= viking_flush_page_for_dma,
+};
+
+#ifdef CONFIG_SMP
+/* On sun4d the cpu broadcasts local TLB flushes, so we can just
+ * perform the local TLB flush and all the other cpus will see it.
+ * But, unfortunately, there is a bug in the sun4d XBUS backplane
+ * that requires that we add some synchronization to these flushes.
+ *
+ * The bug is that the fifo which keeps track of all the pending TLB
+ * broadcasts in the system is an entry or two too small, so if we
+ * have too many going at once we'll overflow that fifo and lose a TLB
+ * flush resulting in corruption.
+ *
+ * Our workaround is to take a global spinlock around the TLB flushes,
+ * which guarentees we won't ever have too many pending.  It's a big
+ * hammer, but a semaphore like system to make sure we only have N TLB
+ * flushes going at once will require SMP locking anyways so there's
+ * no real value in trying any harder than this.
+ */
+static struct sparc32_cachetlb_ops viking_sun4d_smp_ops = {
+	.cache_all	= viking_flush_cache_all,
+	.cache_mm	= viking_flush_cache_mm,
+	.cache_page	= viking_flush_cache_page,
+	.cache_range	= viking_flush_cache_range,
+	.tlb_all	= sun4dsmp_flush_tlb_all,
+	.tlb_mm		= sun4dsmp_flush_tlb_mm,
+	.tlb_page	= sun4dsmp_flush_tlb_page,
+	.tlb_range	= sun4dsmp_flush_tlb_range,
+	.page_to_ram	= viking_flush_page_to_ram,
+	.sig_insns	= viking_flush_sig_insns,
+	.page_for_dma	= viking_flush_page_for_dma,
+};
+#endif
+
 static void __init init_viking(void)
 {
 	unsigned long mreg = srmmu_get_mmureg();
@@ -1742,76 +1781,101 @@ static void __init init_viking(void)
 		 * This is only necessary because of the new way in
 		 * which we use the IOMMU.
 		 */
-		BTFIXUPSET_CALL(flush_page_for_dma, viking_flush_page, BTFIXUPCALL_NORM);
-
+		viking_ops.page_for_dma = viking_flush_page;
+#ifdef CONFIG_SMP
+		viking_sun4d_smp_ops.page_for_dma = viking_flush_page;
+#endif
 		flush_page_for_dma_global = 0;
 	} else {
 		srmmu_name = "TI Viking/MXCC";
 		viking_mxcc_present = 1;
-
 		srmmu_cache_pagetables = 1;
-
-		/* MXCC vikings lack the DMA snooping bug. */
-		BTFIXUPSET_CALL(flush_page_for_dma, viking_flush_page_for_dma, BTFIXUPCALL_NOP);
 	}
 
-	BTFIXUPSET_CALL(flush_cache_all, viking_flush_cache_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_mm, viking_flush_cache_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_page, viking_flush_cache_page, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_range, viking_flush_cache_range, BTFIXUPCALL_NORM);
-
+	sparc32_cachetlb_ops = (const struct sparc32_cachetlb_ops *)
+		&viking_ops;
 #ifdef CONFIG_SMP
-	if (sparc_cpu_model == sun4d) {
-		BTFIXUPSET_CALL(flush_tlb_all, sun4dsmp_flush_tlb_all, BTFIXUPCALL_NORM);
-		BTFIXUPSET_CALL(flush_tlb_mm, sun4dsmp_flush_tlb_mm, BTFIXUPCALL_NORM);
-		BTFIXUPSET_CALL(flush_tlb_page, sun4dsmp_flush_tlb_page, BTFIXUPCALL_NORM);
-		BTFIXUPSET_CALL(flush_tlb_range, sun4dsmp_flush_tlb_range, BTFIXUPCALL_NORM);
-	} else
+	if (sparc_cpu_model == sun4d)
+		sparc32_cachetlb_ops = (const struct sparc32_cachetlb_ops *)
+			&viking_sun4d_smp_ops;
 #endif
-	{
-		BTFIXUPSET_CALL(flush_tlb_all, viking_flush_tlb_all, BTFIXUPCALL_NORM);
-		BTFIXUPSET_CALL(flush_tlb_mm, viking_flush_tlb_mm, BTFIXUPCALL_NORM);
-		BTFIXUPSET_CALL(flush_tlb_page, viking_flush_tlb_page, BTFIXUPCALL_NORM);
-		BTFIXUPSET_CALL(flush_tlb_range, viking_flush_tlb_range, BTFIXUPCALL_NORM);
-	}
-
-	BTFIXUPSET_CALL(__flush_page_to_ram, viking_flush_page_to_ram, BTFIXUPCALL_NOP);
-	BTFIXUPSET_CALL(flush_sig_insns, viking_flush_sig_insns, BTFIXUPCALL_NOP);
 
 	poke_srmmu = poke_viking;
 }
 
 #ifdef CONFIG_SPARC_LEON
+static void leon_flush_cache_mm(struct mm_struct *mm)
+{
+	leon_flush_cache_all();
+}
 
-void __init poke_leonsparc(void)
+static void leon_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
 {
+	leon_flush_pcache_all(vma, page);
 }
 
-void __init init_leon(void)
+static void leon_flush_cache_range(struct vm_area_struct *vma,
+				   unsigned long start,
+				   unsigned long end)
 {
+	leon_flush_cache_all();
+}
 
-	srmmu_name = "LEON";
+static void leon_flush_tlb_mm(struct mm_struct *mm)
+{
+	leon_flush_tlb_all();
+}
+
+static void leon_flush_tlb_page(struct vm_area_struct *vma,
+				unsigned long page)
+{
+	leon_flush_tlb_all();
+}
 
-	BTFIXUPSET_CALL(flush_cache_all, leon_flush_cache_all,
-			BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_mm, leon_flush_cache_all,
-			BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_page, leon_flush_pcache_all,
-			BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_range, leon_flush_cache_all,
-			BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_page_for_dma, leon_flush_dcache_all,
-			BTFIXUPCALL_NORM);
-
-	BTFIXUPSET_CALL(flush_tlb_all, leon_flush_tlb_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_mm, leon_flush_tlb_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_page, leon_flush_tlb_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_tlb_range, leon_flush_tlb_all, BTFIXUPCALL_NORM);
-
-	BTFIXUPSET_CALL(__flush_page_to_ram, leon_flush_cache_all,
-			BTFIXUPCALL_NOP);
-	BTFIXUPSET_CALL(flush_sig_insns, leon_flush_cache_all, BTFIXUPCALL_NOP);
+static void leon_flush_tlb_range(struct vm_area_struct *vma,
+				 unsigned long start,
+				 unsigned long end)
+{
+	leon_flush_tlb_all();
+}
+
+static void leon_flush_page_to_ram(unsigned long page)
+{
+	leon_flush_cache_all();
+}
+
+static void leon_flush_sig_insns(struct mm_struct *mm, unsigned long page)
+{
+	leon_flush_cache_all();
+}
+
+static void leon_flush_page_for_dma(unsigned long page)
+{
+	leon_flush_dcache_all();
+}
+
+void __init poke_leonsparc(void)
+{
+}
+
+static const struct sparc32_cachetlb_ops leon_ops = {
+	.cache_all	= leon_flush_cache_all,
+	.cache_mm	= leon_flush_cache_mm,
+	.cache_page	= leon_flush_cache_page,
+	.cache_range	= leon_flush_cache_range,
+	.tlb_all	= leon_flush_tlb_all,
+	.tlb_mm		= leon_flush_tlb_mm,
+	.tlb_page	= leon_flush_tlb_page,
+	.tlb_range	= leon_flush_tlb_range,
+	.page_to_ram	= leon_flush_page_to_ram,
+	.sig_insns	= leon_flush_sig_insns,
+	.page_for_dma	= leon_flush_page_for_dma,
+};
 
+void __init init_leon(void)
+{
+	srmmu_name = "LEON";
+	sparc32_cachetlb_ops = &leon_ops;
 	poke_srmmu = poke_leonsparc;
 
 	srmmu_cache_pagetables = 0;
@@ -1925,10 +1989,152 @@ static void __init get_srmmu_type(void)
 /* Local cross-calls. */
 static void smp_flush_page_for_dma(unsigned long page)
 {
-	xc1((smpfunc_t) BTFIXUP_CALL(local_flush_page_for_dma), page);
-	local_flush_page_for_dma(page);
+	xc1((smpfunc_t) local_ops->page_for_dma, page);
+	local_ops->page_for_dma(page);
+}
+
+static void smp_flush_cache_all(void)
+{
+	xc0((smpfunc_t) local_ops->cache_all);
+	local_ops->cache_all();
+}
+
+static void smp_flush_tlb_all(void)
+{
+	xc0((smpfunc_t) local_ops->tlb_all);
+	local_ops->tlb_all();
+}
+
+static void smp_flush_cache_mm(struct mm_struct *mm)
+{
+	if (mm->context != NO_CONTEXT) {
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask))
+			xc1((smpfunc_t) local_ops->cache_mm, (unsigned long) mm);
+		local_ops->cache_mm(mm);
+	}
+}
+
+static void smp_flush_tlb_mm(struct mm_struct *mm)
+{
+	if (mm->context != NO_CONTEXT) {
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask)) {
+			xc1((smpfunc_t) local_ops->tlb_mm, (unsigned long) mm);
+			if (atomic_read(&mm->mm_users) == 1 && current->active_mm == mm)
+				cpumask_copy(mm_cpumask(mm),
+					     cpumask_of(smp_processor_id()));
+		}
+		local_ops->tlb_mm(mm);
+	}
+}
+
+static void smp_flush_cache_range(struct vm_area_struct *vma,
+				  unsigned long start,
+				  unsigned long end)
+{
+	struct mm_struct *mm = vma->vm_mm;
+
+	if (mm->context != NO_CONTEXT) {
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask))
+			xc3((smpfunc_t) local_ops->cache_range,
+			    (unsigned long) vma, start, end);
+		local_ops->cache_range(vma, start, end);
+	}
+}
+
+static void smp_flush_tlb_range(struct vm_area_struct *vma,
+				unsigned long start,
+				unsigned long end)
+{
+	struct mm_struct *mm = vma->vm_mm;
+
+	if (mm->context != NO_CONTEXT) {
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask))
+			xc3((smpfunc_t) local_ops->tlb_range,
+			    (unsigned long) vma, start, end);
+		local_ops->tlb_range(vma, start, end);
+	}
 }
 
+static void smp_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
+{
+	struct mm_struct *mm = vma->vm_mm;
+
+	if (mm->context != NO_CONTEXT) {
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask))
+			xc2((smpfunc_t) local_ops->cache_page,
+			    (unsigned long) vma, page);
+		local_ops->cache_page(vma, page);
+	}
+}
+
+static void smp_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
+{
+	struct mm_struct *mm = vma->vm_mm;
+
+	if (mm->context != NO_CONTEXT) {
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask))
+			xc2((smpfunc_t) local_ops->tlb_page,
+			    (unsigned long) vma, page);
+		local_ops->tlb_page(vma, page);
+	}
+}
+
+static void smp_flush_page_to_ram(unsigned long page)
+{
+	/* Current theory is that those who call this are the one's
+	 * who have just dirtied their cache with the pages contents
+	 * in kernel space, therefore we only run this on local cpu.
+	 *
+	 * XXX This experiment failed, research further... -DaveM
+	 */
+#if 1
+	xc1((smpfunc_t) local_ops->page_to_ram, page);
+#endif
+	local_ops->page_to_ram(page);
+}
+
+static void smp_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
+{
+	cpumask_t cpu_mask;
+	cpumask_copy(&cpu_mask, mm_cpumask(mm));
+	cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+	if (!cpumask_empty(&cpu_mask))
+		xc2((smpfunc_t) local_ops->sig_insns,
+		    (unsigned long) mm, insn_addr);
+	local_ops->sig_insns(mm, insn_addr);
+}
+
+static struct sparc32_cachetlb_ops smp_cachetlb_ops = {
+	.cache_all	= smp_flush_cache_all,
+	.cache_mm	= smp_flush_cache_mm,
+	.cache_page	= smp_flush_cache_page,
+	.cache_range	= smp_flush_cache_range,
+	.tlb_all	= smp_flush_tlb_all,
+	.tlb_mm		= smp_flush_tlb_mm,
+	.tlb_page	= smp_flush_tlb_page,
+	.tlb_range	= smp_flush_tlb_range,
+	.page_to_ram	= smp_flush_page_to_ram,
+	.sig_insns	= smp_flush_sig_insns,
+	.page_for_dma	= smp_flush_page_for_dma,
+};
 #endif
 
 /* Load up routines and constants for sun4m and sun4d mmu */
@@ -1942,44 +2148,30 @@ void __init load_mmu(void)
 
 #ifdef CONFIG_SMP
 	/* El switcheroo... */
+	local_ops = sparc32_cachetlb_ops;
 
-	BTFIXUPCOPY_CALL(local_flush_cache_all, flush_cache_all);
-	BTFIXUPCOPY_CALL(local_flush_cache_mm, flush_cache_mm);
-	BTFIXUPCOPY_CALL(local_flush_cache_range, flush_cache_range);
-	BTFIXUPCOPY_CALL(local_flush_cache_page, flush_cache_page);
-	BTFIXUPCOPY_CALL(local_flush_tlb_all, flush_tlb_all);
-	BTFIXUPCOPY_CALL(local_flush_tlb_mm, flush_tlb_mm);
-	BTFIXUPCOPY_CALL(local_flush_tlb_range, flush_tlb_range);
-	BTFIXUPCOPY_CALL(local_flush_tlb_page, flush_tlb_page);
-	BTFIXUPCOPY_CALL(local_flush_page_to_ram, __flush_page_to_ram);
-	BTFIXUPCOPY_CALL(local_flush_sig_insns, flush_sig_insns);
-	BTFIXUPCOPY_CALL(local_flush_page_for_dma, flush_page_for_dma);
-
-	BTFIXUPSET_CALL(flush_cache_all, smp_flush_cache_all, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_mm, smp_flush_cache_mm, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_range, smp_flush_cache_range, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_cache_page, smp_flush_cache_page, BTFIXUPCALL_NORM);
-	if (sparc_cpu_model != sun4d &&
-	    sparc_cpu_model != sparc_leon) {
-		BTFIXUPSET_CALL(flush_tlb_all, smp_flush_tlb_all, BTFIXUPCALL_NORM);
-		BTFIXUPSET_CALL(flush_tlb_mm, smp_flush_tlb_mm, BTFIXUPCALL_NORM);
-		BTFIXUPSET_CALL(flush_tlb_range, smp_flush_tlb_range, BTFIXUPCALL_NORM);
-		BTFIXUPSET_CALL(flush_tlb_page, smp_flush_tlb_page, BTFIXUPCALL_NORM);
+	if (sparc_cpu_model == sun4d || sparc_cpu_model == sparc_leon) {
+		smp_cachetlb_ops.tlb_all = local_ops->tlb_all;
+		smp_cachetlb_ops.tlb_mm = local_ops->tlb_mm;
+		smp_cachetlb_ops.tlb_range = local_ops->tlb_range;
+		smp_cachetlb_ops.tlb_page = local_ops->tlb_page;
 	}
-	BTFIXUPSET_CALL(__flush_page_to_ram, smp_flush_page_to_ram, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_sig_insns, smp_flush_sig_insns, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(flush_page_for_dma, smp_flush_page_for_dma, BTFIXUPCALL_NORM);
 
 	if (poke_srmmu == poke_viking) {
 		/* Avoid unnecessary cross calls. */
-		BTFIXUPCOPY_CALL(flush_cache_all, local_flush_cache_all);
-		BTFIXUPCOPY_CALL(flush_cache_mm, local_flush_cache_mm);
-		BTFIXUPCOPY_CALL(flush_cache_range, local_flush_cache_range);
-		BTFIXUPCOPY_CALL(flush_cache_page, local_flush_cache_page);
-		BTFIXUPCOPY_CALL(__flush_page_to_ram, local_flush_page_to_ram);
-		BTFIXUPCOPY_CALL(flush_sig_insns, local_flush_sig_insns);
-		BTFIXUPCOPY_CALL(flush_page_for_dma, local_flush_page_for_dma);
+		smp_cachetlb_ops.cache_all = local_ops->cache_all;
+		smp_cachetlb_ops.cache_mm = local_ops->cache_mm;
+		smp_cachetlb_ops.cache_range = local_ops->cache_range;
+		smp_cachetlb_ops.cache_page = local_ops->cache_page;
+
+		smp_cachetlb_ops.page_to_ram = local_ops->page_to_ram;
+		smp_cachetlb_ops.sig_insns = local_ops->sig_insns;
+		smp_cachetlb_ops.page_for_dma = local_ops->page_for_dma;
 	}
+
+	/* It really is const after this point. */
+	sparc32_cachetlb_ops = (const struct sparc32_cachetlb_ops *)
+		&smp_cachetlb_ops;
 #endif
 
 	if (sparc_cpu_model == sun4d)