[PATCH] CRIS update: mm

Memory management patches.

* SMP support.
* Non-executable stack (on v32).
* 4-level page tables.
* Added simple Thread Local Storage support.

Signed-off-by: Mikael Starvik <starvik@axis.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/cris/mm/ioremap.c

@@ -14,9 +14,10 @@
 #include <asm/pgalloc.h>
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
+#include <asm/arch/memmap.h>
 
 extern inline void remap_area_pte(pte_t * pte, unsigned long address, unsigned long size,
-	unsigned long phys_addr, unsigned long flags)
+	unsigned long phys_addr, pgprot_t prot)
 {
 	unsigned long end;
 
@@ -31,9 +32,7 @@ extern inline void remap_area_pte(pte_t * pte, unsigned long address, unsigned l
 			printk("remap_area_pte: page already exists\n");
 			BUG();
 		}
-		set_pte(pte, mk_pte_phys(phys_addr, __pgprot(_PAGE_PRESENT | __READABLE | 
-							     __WRITEABLE | _PAGE_GLOBAL |
-							     _PAGE_KERNEL | flags)));
+		set_pte(pte, mk_pte_phys(phys_addr, prot));
 		address += PAGE_SIZE;
 		phys_addr += PAGE_SIZE;
 		pte++;
@@ -41,7 +40,7 @@ extern inline void remap_area_pte(pte_t * pte, unsigned long address, unsigned l
 }
 
 static inline int remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size,
-	unsigned long phys_addr, unsigned long flags)
+	unsigned long phys_addr, pgprot_t prot)
 {
 	unsigned long end;
 
@@ -56,7 +55,7 @@ static inline int remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned lo
 		pte_t * pte = pte_alloc_kernel(&init_mm, pmd, address);
 		if (!pte)
 			return -ENOMEM;
-		remap_area_pte(pte, address, end - address, address + phys_addr, flags);
+		remap_area_pte(pte, address, end - address, address + phys_addr, prot);
 		address = (address + PMD_SIZE) & PMD_MASK;
 		pmd++;
 	} while (address && (address < end));
@@ -64,7 +63,7 @@ static inline int remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned lo
 }
 
 static int remap_area_pages(unsigned long address, unsigned long phys_addr,
-				 unsigned long size, unsigned long flags)
+				 unsigned long size, pgprot_t prot)
 {
 	int error;
 	pgd_t * dir;
@@ -77,13 +76,19 @@ static int remap_area_pages(unsigned long address, unsigned long phys_addr,
 		BUG();
 	spin_lock(&init_mm.page_table_lock);
 	do {
+		pud_t *pud;
 		pmd_t *pmd;
-		pmd = pmd_alloc(&init_mm, dir, address);
+
 		error = -ENOMEM;
+		pud = pud_alloc(&init_mm, dir, address);
+		if (!pud)
+			break;
+		pmd = pmd_alloc(&init_mm, pud, address);
+
 		if (!pmd)
 			break;
 		if (remap_area_pmd(pmd, address, end - address,
-				   phys_addr + address, flags))
+				   phys_addr + address, prot))
 			break;
 		error = 0;
 		address = (address + PGDIR_SIZE) & PGDIR_MASK;
@@ -107,9 +112,9 @@ static int remap_area_pages(unsigned long address, unsigned long phys_addr,
  * have to convert them into an offset in a page-aligned mapping, but the
  * caller shouldn't need to know that small detail.
  */
-void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
+void __iomem * __ioremap_prot(unsigned long phys_addr, unsigned long size, pgprot_t prot)
 {
-	void * addr;
+	void __iomem * addr;
 	struct vm_struct * area;
 	unsigned long offset, last_addr;
 
@@ -131,15 +136,36 @@ void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flag
 	area = get_vm_area(size, VM_IOREMAP);
 	if (!area)
 		return NULL;
-	addr = area->addr;
-	if (remap_area_pages((unsigned long) addr, phys_addr, size, flags)) {
-		vfree(addr);
+	addr = (void __iomem *)area->addr;
+	if (remap_area_pages((unsigned long) addr, phys_addr, size, prot)) {
+		vfree((void __force *)addr);
 		return NULL;
 	}
-	return (void *) (offset + (char *)addr);
+	return (void __iomem *) (offset + (char __iomem *)addr);
 }
 
-void iounmap(void *addr)
+void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
+{
+	return __ioremap_prot(phys_addr, size,
+		              __pgprot(_PAGE_PRESENT | __READABLE |
+				       __WRITEABLE | _PAGE_GLOBAL |
+				       _PAGE_KERNEL | flags));
+}
+
+/**
+ * ioremap_nocache     -   map bus memory into CPU space
+ * @offset:    bus address of the memory
+ * @size:      size of the resource to map
+ *
+ * Must be freed with iounmap.
+ */
+
+void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size)
+{
+        return __ioremap(phys_addr | MEM_NON_CACHEABLE, size, 0);
+}
+
+void iounmap(volatile void __iomem *addr)
 {
 	if (addr > high_memory)
 		return vfree((void *) (PAGE_MASK & (unsigned long) addr));