Merge bk://kernel.bkbits.net/davem/sparc-2.5

into home.transmeta.com:/home/torvalds/v2.5/linux

4 files changed, 55 insertions, 8 deletions

diff --git a/include/asm-sparc/bitext.h b/include/asm-sparc/bitext.h
new file mode 100644
index 000000000000..88b1518834a8
--- /dev/null
+++ b/include/asm-sparc/bitext.h
@@ -0,0 +1,24 @@
+/*
+ * bitext.h: Bit string operations on the sparc, specific to architecture.
+ *
+ * Copyright 2002 Pete Zaitcev <zaitcev@yahoo.com>
+ */
+
+#ifndef _SPARC_BITEXT_H
+#define _SPARC_BITEXT_H
+
+#include <linux/smp_lock.h>
+
+struct bit_map {
+	spinlock_t lock;
+	unsigned long *map;
+	int size;
+	int used;
+	int last_off;
+};
+
+extern int bit_map_string_get(struct bit_map *t, int len, int align);
+extern void bit_map_clear(struct bit_map *t, int offset, int len);
+extern void bit_map_init(struct bit_map *t, unsigned long *map, int size);
+
+#endif /* defined(_SPARC_BITEXT_H) */
diff --git a/include/asm-sparc/iommu.h b/include/asm-sparc/iommu.h
index cf1d5b794833..8171362d56b9 100644
--- a/include/asm-sparc/iommu.h
+++ b/include/asm-sparc/iommu.h
@@ -6,6 +6,7 @@
 #define _SPARC_IOMMU_H
 
 #include <asm/page.h>
+#include <asm/bitext.h>
 
 /* The iommu handles all virtual to physical address translations
  * that occur between the SBUS and physical memory.  Access by
@@ -100,11 +101,11 @@ struct iommu_regs {
 struct iommu_struct {
 	struct iommu_regs *regs;
 	iopte_t *page_table;
-	iopte_t *lowest;     /* to speed up searches... */
-	unsigned long plow;
 	/* For convenience */
 	unsigned long start; /* First managed virtual address */
 	unsigned long end;   /* Last managed virtual address */
+
+	struct bit_map usemap;
 };
 
 extern __inline__ void iommu_invalidate(struct iommu_regs *regs)
@@ -112,9 +113,9 @@ extern __inline__ void iommu_invalidate(struct iommu_regs *regs)
 	regs->tlbflush = 0;
 }
 
-extern __inline__ void iommu_invalidate_page(struct iommu_regs *regs, unsigned long page)
+extern __inline__ void iommu_invalidate_page(struct iommu_regs *regs, unsigned long ba)
 {
-	regs->pageflush = (page & PAGE_MASK);
+	regs->pageflush = (ba & PAGE_MASK);
 }
 
 #endif /* !(_SPARC_IOMMU_H) */
diff --git a/include/asm-sparc/pgtable.h b/include/asm-sparc/pgtable.h
index c25c0d4f7461..137421b5bdc4 100644
--- a/include/asm-sparc/pgtable.h
+++ b/include/asm-sparc/pgtable.h
@@ -27,6 +27,7 @@
 #ifndef __ASSEMBLY__
 
 struct vm_area_struct;
+struct page;
 
 extern void load_mmu(void);
 extern unsigned long calc_highpages(void);
@@ -51,15 +52,30 @@ BTFIXUPDEF_CALL(void,  mmu_release_scsi_sgl, struct scatterlist *, int, struct s
 
 /*
  * mmu_map/unmap are provided by iommu/iounit; Invalid to call on IIep.
+ *
+ * The mmu_map_dma_area establishes two mappings in one go.
+ * These mappings point to pages normally mapped at 'va' (linear address).
+ * First mapping is for CPU visible address at 'a', uncached.
+ * This is an alias, but it works because it is an uncached mapping.
+ * Second mapping is for device visible address, or "bus" address.
+ * The bus address is returned at '*pba'.
+ *
+ * These functions seem distinct, but are hard to split. On sun4c,
+ * at least for now, 'a' is equal to bus address, and retured in *pba.
+ * On sun4m, page attributes depend on the CPU type, so we have to
+ * know if we are mapping RAM or I/O, so it has to be an additional argument
+ * to a separate mapping function for CPU visible mappings.
  */
-BTFIXUPDEF_CALL(void,  mmu_map_dma_area, unsigned long va, __u32 addr, int len)
-BTFIXUPDEF_CALL(unsigned long /*phys*/, mmu_translate_dvma, unsigned long busa)
+BTFIXUPDEF_CALL(int,  mmu_map_dma_area, dma_addr_t *, unsigned long, unsigned long, int len)
+BTFIXUPDEF_CALL(struct page *, mmu_translate_dvma, unsigned long busa)
 BTFIXUPDEF_CALL(void,  mmu_unmap_dma_area, unsigned long busa, int len)
 
-#define mmu_map_dma_area(va, ba,len) BTFIXUP_CALL(mmu_map_dma_area)(va,ba,len)
+#define mmu_map_dma_area(pba,va,a,len) BTFIXUP_CALL(mmu_map_dma_area)(pba,va,a,len)
 #define mmu_unmap_dma_area(ba,len) BTFIXUP_CALL(mmu_unmap_dma_area)(ba,len)
 #define mmu_translate_dvma(ba)     BTFIXUP_CALL(mmu_translate_dvma)(ba)
 
+/*
+ */
 BTFIXUPDEF_SIMM13(pmd_shift)
 BTFIXUPDEF_SETHI(pmd_size)
 BTFIXUPDEF_SETHI(pmd_mask)
@@ -377,6 +393,12 @@ BTFIXUPDEF_CALL(void, update_mmu_cache, struct vm_area_struct *, unsigned long,
 
 #define update_mmu_cache(vma,addr,pte) BTFIXUP_CALL(update_mmu_cache)(vma,addr,pte)
 
+BTFIXUPDEF_CALL(void, sparc_mapiorange, unsigned int, unsigned long,
+    unsigned long, unsigned int)
+BTFIXUPDEF_CALL(void, sparc_unmapiorange, unsigned long, unsigned int)
+#define sparc_mapiorange(bus,pa,va,len) BTFIXUP_CALL(sparc_mapiorange)(bus,pa,va,len)
+#define sparc_unmapiorange(va,len) BTFIXUP_CALL(sparc_unmapiorange)(va,len)
+
 extern int invalid_segment;
 
 /* Encode and de-code a swap entry */
diff --git a/include/asm-sparc/sbus.h b/include/asm-sparc/sbus.h
index bf09706e88ea..075c98e2bc56 100644
--- a/include/asm-sparc/sbus.h
+++ b/include/asm-sparc/sbus.h
@@ -10,7 +10,7 @@
 #include <linux/ioport.h>
 
 #include <asm/oplib.h>
-#include <asm/iommu.h>
+/* #include <asm/iommu.h> */ /* Unused since we use opaque iommu (|io-unit) */
 #include <asm/scatterlist.h>
 
 /* We scan which devices are on the SBus using the PROM node device