1 files changed, 95 insertions, 171 deletions

diff --git a/arch/sh/mm/ioremap_64.c b/arch/sh/mm/ioremap_64.c
index 31e1bb5effbe..828c8597219d 100644
--- a/arch/sh/mm/ioremap_64.c
+++ b/arch/sh/mm/ioremap_64.c
@@ -20,6 +20,7 @@
 #include <linux/io.h>
 #include <linux/bootmem.h>
 #include <linux/proc_fs.h>
+#include <linux/slab.h>
 #include <asm/page.h>
 #include <asm/pgalloc.h>
 #include <asm/addrspace.h>
@@ -27,88 +28,17 @@
 #include <asm/tlbflush.h>
 #include <asm/mmu.h>
 
-static void shmedia_mapioaddr(unsigned long, unsigned long);
-static unsigned long shmedia_ioremap(struct resource *, u32, int);
-
-/*
- * Generic mapping function (not visible outside):
- */
-
-/*
- * Remap an arbitrary physical address space into the kernel virtual
- * address space. Needed when the kernel wants to access high addresses
- * directly.
- *
- * NOTE! We need to allow non-page-aligned mappings too: we will obviously
- * 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 * addr;
-        struct vm_struct * area;
-        unsigned long offset, last_addr;
-        pgprot_t pgprot;
-
-        /* Don't allow wraparound or zero size */
-        last_addr = phys_addr + size - 1;
-        if (!size || last_addr < phys_addr)
-                return NULL;
-
-        pgprot = __pgprot(_PAGE_PRESENT  | _PAGE_READ   |
-                          _PAGE_WRITE    | _PAGE_DIRTY  |
-                          _PAGE_ACCESSED | _PAGE_SHARED | flags);
-
-        /*
-         * Mappings have to be page-aligned
-         */
-        offset = phys_addr & ~PAGE_MASK;
-        phys_addr &= PAGE_MASK;
-        size = PAGE_ALIGN(last_addr + 1) - phys_addr;
-
-        /*
-         * Ok, go for it..
-         */
-        area = get_vm_area(size, VM_IOREMAP);
-        if (!area)
-                return NULL;
-        pr_debug("Get vm_area returns %p addr %p\n", area, area->addr);
-        area->phys_addr = phys_addr;
-        addr = area->addr;
-        if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
-                               phys_addr, pgprot)) {
-                vunmap(addr);
-                return NULL;
-        }
-        return (void *) (offset + (char *)addr);
-}
-EXPORT_SYMBOL(__ioremap);
-
-void __iounmap(void *addr)
-{
-        struct vm_struct *area;
-
-        vfree((void *) (PAGE_MASK & (unsigned long) addr));
-        area = remove_vm_area((void *) (PAGE_MASK & (unsigned long) addr));
-        if (!area) {
-                printk(KERN_ERR "iounmap: bad address %p\n", addr);
-                return;
-        }
-
-        kfree(area);
-}
-EXPORT_SYMBOL(__iounmap);
-
 static struct resource shmedia_iomap = {
         .name   = "shmedia_iomap",
         .start  = IOBASE_VADDR + PAGE_SIZE,
         .end    = IOBASE_END - 1,
 };
 
-static void shmedia_mapioaddr(unsigned long pa, unsigned long va);
+static void shmedia_mapioaddr(unsigned long pa, unsigned long va,
+                              unsigned long flags);
 static void shmedia_unmapioaddr(unsigned long vaddr);
-static unsigned long shmedia_ioremap(struct resource *res, u32 pa, int sz);
+static void __iomem *shmedia_ioremap(struct resource *res, u32 pa,
+                                     int sz, unsigned long flags);
 
 /*
  * We have the same problem as the SPARC, so lets have the same comment:
@@ -130,18 +60,18 @@ static struct xresource xresv[XNRES];
 
 static struct xresource *xres_alloc(void)
 {
-        struct xresource *xrp;
-        int n;
-
-        xrp = xresv;
-        for (n = 0; n < XNRES; n++) {
-                if (xrp->xflag == 0) {
-                        xrp->xflag = 1;
-                        return xrp;
-                }
-                xrp++;
-        }
-        return NULL;
+        struct xresource *xrp;
+        int n;
+
+        xrp = xresv;
+        for (n = 0; n < XNRES; n++) {
+                if (xrp->xflag == 0) {
+                        xrp->xflag = 1;
+                        return xrp;
+                }
+                xrp++;
+        }
+        return NULL;
 }
 
 static void xres_free(struct xresource *xrp)
@@ -161,76 +91,71 @@ static struct resource *shmedia_find_resource(struct resource *root,
         return NULL;
 }
 
-static unsigned long shmedia_alloc_io(unsigned long phys, unsigned long size,
-                                      const char *name)
+static void __iomem *shmedia_alloc_io(unsigned long phys, unsigned long size,
+                                      const char *name, unsigned long flags)
 {
-        static int printed_full = 0;
-        struct xresource *xres;
-        struct resource *res;
-        char *tack;
-        int tlen;
-
-        if (name == NULL) name = "???";
-
-        if ((xres = xres_alloc()) != 0) {
-                tack = xres->xname;
-                res = &xres->xres;
-        } else {
-                if (!printed_full) {
-                        printk("%s: done with statics, switching to kmalloc\n",
-                               __func__);
-                        printed_full = 1;
-                }
-                tlen = strlen(name);
-                tack = kmalloc(sizeof (struct resource) + tlen + 1, GFP_KERNEL);
-                if (!tack)
-                        return -ENOMEM;
-                memset(tack, 0, sizeof(struct resource));
-                res = (struct resource *) tack;
-                tack += sizeof (struct resource);
-        }
-
-        strncpy(tack, name, XNMLN);
-        tack[XNMLN] = 0;
-        res->name = tack;
-
-        return shmedia_ioremap(res, phys, size);
+        static int printed_full;
+        struct xresource *xres;
+        struct resource *res;
+        char *tack;
+        int tlen;
+
+        if (name == NULL)
+                name = "???";
+
+        xres = xres_alloc();
+        if (xres != 0) {
+                tack = xres->xname;
+                res = &xres->xres;
+        } else {
+                if (!printed_full) {
+                        printk(KERN_NOTICE "%s: done with statics, "
+                               "switching to kmalloc\n", __func__);
+                        printed_full = 1;
+                }
+                tlen = strlen(name);
+                tack = kmalloc(sizeof(struct resource) + tlen + 1, GFP_KERNEL);
+                if (!tack)
+                        return NULL;
+                memset(tack, 0, sizeof(struct resource));
+                res = (struct resource *) tack;
+                tack += sizeof(struct resource);
+        }
+
+        strncpy(tack, name, XNMLN);
+        tack[XNMLN] = 0;
+        res->name = tack;
+
+        return shmedia_ioremap(res, phys, size, flags);
 }
 
-static unsigned long shmedia_ioremap(struct resource *res, u32 pa, int sz)
+static void __iomem *shmedia_ioremap(struct resource *res, u32 pa, int sz,
+                                     unsigned long flags)
 {
-        unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK);
+        unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK);
         unsigned long round_sz = (offset + sz + PAGE_SIZE-1) & PAGE_MASK;
-        unsigned long va;
-        unsigned int psz;
+        unsigned long va;
+        unsigned int psz;
 
-        if (allocate_resource(&shmedia_iomap, res, round_sz,
+        if (allocate_resource(&shmedia_iomap, res, round_sz,
                               shmedia_iomap.start, shmedia_iomap.end,
                               PAGE_SIZE, NULL, NULL) != 0) {
-                panic("alloc_io_res(%s): cannot occupy\n",
-                    (res->name != NULL)? res->name: "???");
-        }
+                panic("alloc_io_res(%s): cannot occupy\n",
+                      (res->name != NULL) ? res->name : "???");
+        }
 
-        va = res->start;
-        pa &= PAGE_MASK;
+        va = res->start;
+        pa &= PAGE_MASK;
 
         psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE;
 
-        /* log at boot time ... */
-        printk("mapioaddr: %6s  [%2d page%s]  va 0x%08lx   pa 0x%08x\n",
-               ((res->name != NULL) ? res->name : "???"),
-               psz, psz == 1 ? " " : "s", va, pa);
-
-        for (psz = res->end - res->start + 1; psz != 0; psz -= PAGE_SIZE) {
-                shmedia_mapioaddr(pa, va);
-                va += PAGE_SIZE;
-                pa += PAGE_SIZE;
-        }
-
-        res->start += offset;
-        res->end = res->start + sz - 1;         /* not strictly necessary.. */
+        for (psz = res->end - res->start + 1; psz != 0; psz -= PAGE_SIZE) {
+                shmedia_mapioaddr(pa, va, flags);
+                va += PAGE_SIZE;
+                pa += PAGE_SIZE;
+        }
 
-        return res->start;
+        return (void __iomem *)(unsigned long)(res->start + offset);
 }
 
 static void shmedia_free_io(struct resource *res)
@@ -249,14 +174,12 @@ static void shmedia_free_io(struct resource *res)
 
 static __init_refok void *sh64_get_page(void)
 {
-        extern int after_bootmem;
         void *page;
 
-        if (after_bootmem) {
-                page = (void *)get_zeroed_page(GFP_ATOMIC);
-        } else {
+        if (slab_is_available())
+                page = (void *)get_zeroed_page(GFP_KERNEL);
+        else
                 page = alloc_bootmem_pages(PAGE_SIZE);
-        }
 
         if (!page || ((unsigned long)page & ~PAGE_MASK))
                 panic("sh64_get_page: Out of memory already?\n");
@@ -264,17 +187,20 @@ static __init_refok void *sh64_get_page(void)
         return page;
 }
 
-static void shmedia_mapioaddr(unsigned long pa, unsigned long va)
+static void shmedia_mapioaddr(unsigned long pa, unsigned long va,
+                              unsigned long flags)
 {
         pgd_t *pgdp;
         pud_t *pudp;
         pmd_t *pmdp;
         pte_t *ptep, pte;
         pgprot_t prot;
-        unsigned long flags = 1; /* 1 = CB0-1 device */
 
         pr_debug("shmedia_mapiopage pa %08lx va %08lx\n",  pa, va);
 
+        if (!flags)
+                flags = 1; /* 1 = CB0-1 device */
+
         pgdp = pgd_offset_k(va);
         if (pgd_none(*pgdp) || !pgd_present(*pgdp)) {
                 pudp = (pud_t *)sh64_get_page();
@@ -288,7 +214,7 @@ static void shmedia_mapioaddr(unsigned long pa, unsigned long va)
         }
 
         pmdp = pmd_offset(pudp, va);
-        if (pmd_none(*pmdp) || !pmd_present(*pmdp) ) {
+        if (pmd_none(*pmdp) || !pmd_present(*pmdp)) {
                 ptep = (pte_t *)sh64_get_page();
                 set_pmd(pmdp, __pmd((unsigned long)ptep + _PAGE_TABLE));
         }
@@ -336,17 +262,19 @@ static void shmedia_unmapioaddr(unsigned long vaddr)
         pte_clear(&init_mm, vaddr, ptep);
 }
 
-unsigned long onchip_remap(unsigned long phys, unsigned long size, const char *name)
+void __iomem *__ioremap(unsigned long offset, unsigned long size,
+                        unsigned long flags)
 {
-        if (size < PAGE_SIZE)
-                size = PAGE_SIZE;
+        char name[14];
 
-        return shmedia_alloc_io(phys, size, name);
+        sprintf(name, "phys_%08x", (u32)offset);
+        return shmedia_alloc_io(offset, size, name, flags);
 }
-EXPORT_SYMBOL(onchip_remap);
+EXPORT_SYMBOL(__ioremap);
 
-void onchip_unmap(unsigned long vaddr)
+void __iounmap(void __iomem *virtual)
 {
+        unsigned long vaddr = (unsigned long)virtual & PAGE_MASK;
         struct resource *res;
         unsigned int psz;
 
@@ -357,10 +285,7 @@ void onchip_unmap(unsigned long vaddr)
                 return;
         }
 
-        psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE;
-
-        printk(KERN_DEBUG "unmapioaddr: %6s  [%2d page%s] freed\n",
-               res->name, psz, psz == 1 ? " " : "s");
+        psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE;
 
         shmedia_free_io(res);
 
@@ -371,9 +296,8 @@ void onchip_unmap(unsigned long vaddr)
                 kfree(res);
         }
 }
-EXPORT_SYMBOL(onchip_unmap);
+EXPORT_SYMBOL(__iounmap);
 
-#ifdef CONFIG_PROC_FS
 static int
 ioremap_proc_info(char *buf, char **start, off_t fpos, int length, int *eof,
                   void *data)
@@ -385,7 +309,10 @@ ioremap_proc_info(char *buf, char **start, off_t fpos, int length, int *eof,
         for (r = ((struct resource *)data)->child; r != NULL; r = r->sibling) {
                 if (p + 32 >= e)        /* Better than nothing */
                         break;
-                if ((nm = r->name) == 0) nm = "???";
+                nm = r->name;
+                if (nm == NULL)
+                        nm = "???";
+
                 p += sprintf(p, "%08lx-%08lx: %s\n",
                              (unsigned long)r->start,
                              (unsigned long)r->end, nm);
@@ -393,14 +320,11 @@ ioremap_proc_info(char *buf, char **start, off_t fpos, int length, int *eof,
 
         return p-buf;
 }
-#endif /* CONFIG_PROC_FS */
 
 static int __init register_proc_onchip(void)
 {
-#ifdef CONFIG_PROC_FS
-        create_proc_read_entry("io_map",0,0, ioremap_proc_info, &shmedia_iomap);
-#endif
+        create_proc_read_entry("io_map", 0, 0, ioremap_proc_info,
+                               &shmedia_iomap);
         return 0;
 }
-
-__initcall(register_proc_onchip);
+late_initcall(register_proc_onchip);