From 0fb849b9d743a20056f2418cd955e5c650658663 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Thu, 7 May 2009 18:10:27 +0900 Subject: sh: Integrate the SH-5 onchip_remap() more coherently. Presently this is special-cased for early initialization. While there are situations where these static early initializations are still necessary, with minor changes it is possible to use this for the regular ioremap implementation as well. This allows us to kill off the special-casing for the remap completely and to start tidying up all of the SH-5 special-casing in drivers. Signed-off-by: Paul Mundt --- arch/sh/mm/ioremap_64.c | 265 +++++++++++++++++------------------------------- 1 file changed, 94 insertions(+), 171 deletions(-) (limited to 'arch/sh/mm/ioremap_64.c') diff --git a/arch/sh/mm/ioremap_64.c b/arch/sh/mm/ioremap_64.c index 31e1bb5effb..2331229f812 100644 --- a/arch/sh/mm/ioremap_64.c +++ b/arch/sh/mm/ioremap_64.c @@ -27,88 +27,17 @@ #include #include -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 +59,18 @@ 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 +90,71 @@ 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 +173,12 @@ 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 (after_bootmem) + 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 +186,20 @@ 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 +213,7 @@ 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 +261,19 @@ 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 +284,7 @@ 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 +295,8 @@ 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 +308,10 @@ 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 +319,11 @@ 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); -- cgit v1.2.3 From 8fc40238b4ebf07cd11ca9707843338be22af72f Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Fri, 22 May 2009 14:21:03 +0900 Subject: sh: Prefer slab_is_available() over after_bootmem. This kills off after_bootmem and switches to using slab_is_available() instead. Presently the only place this is used is by the sh64 ioremap, and there's not much point in keeping the reference around otherwise. Signed-off-by: Paul Mundt --- arch/sh/mm/ioremap_64.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/sh/mm/ioremap_64.c') diff --git a/arch/sh/mm/ioremap_64.c b/arch/sh/mm/ioremap_64.c index 2331229f812..828c8597219 100644 --- a/arch/sh/mm/ioremap_64.c +++ b/arch/sh/mm/ioremap_64.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -175,7 +176,7 @@ static __init_refok void *sh64_get_page(void) { void *page; - if (after_bootmem) + if (slab_is_available()) page = (void *)get_zeroed_page(GFP_KERNEL); else page = alloc_bootmem_pages(PAGE_SIZE); -- cgit v1.2.3