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Commit 91eebf40 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar
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x86: style cleanup of ioremap code 

Fix the coding style before going further.
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 1aaf74e9
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Showing with 70 additions and 75 deletions
arch/x86/mm/ioremap_32.c
View file @ 91eebf40
/*
* arch/i386/mm/ioremap.c
*
* Re-map IO memory to kernel address space so that we can access it.
* This is needed for high PCI addresses that aren't mapped in the
* 640k-1MB IO memory area on PC's
......@@ -21,10 +19,6 @@
#define ISA_START_ADDRESS 0xa0000
#define ISA_END_ADDRESS 0x100000
/*
* 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
......@@ -34,10 +28,11 @@
* have to convert them into an offset in a page-aligned mapping, but the
* caller shouldn't need to know that small detail.
*/
void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
unsigned long flags)
{
void __iomem * addr;
struct vm_struct * area;
void __iomem *addr;
struct vm_struct *area;
unsigned long offset, last_addr;
pgprot_t prot;
......@@ -61,9 +56,10 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
t_addr = __va(phys_addr);
t_end = t_addr + (size - 1);
for(page = virt_to_page(t_addr); page <= virt_to_page(t_end); page++)
if(!PageReserved(page))
for (page = virt_to_page(t_addr);
page <= virt_to_page(t_end); page++)
if (!PageReserved(page))
return NULL;
}
......@@ -85,7 +81,7 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
area->phys_addr = phys_addr;
addr = (void __iomem *) area->addr;
if (ioremap_page_range((unsigned long) addr,
(unsigned long) addr + size, phys_addr, prot)) {
(unsigned long) addr + size, phys_addr, prot)) {
vunmap((void __force *) addr);
return NULL;
}
......@@ -102,31 +98,31 @@ EXPORT_SYMBOL(__ioremap);
* make bus memory CPU accessible via the readb/readw/readl/writeb/
* writew/writel functions and the other mmio helpers. The returned
* address is not guaranteed to be usable directly as a virtual
* address.
* address.
*
* This version of ioremap ensures that the memory is marked uncachable
* on the CPU as well as honouring existing caching rules from things like
* the PCI bus. Note that there are other caches and buffers on many
* the PCI bus. Note that there are other caches and buffers on many
* busses. In particular driver authors should read up on PCI writes
*
* It's useful if some control registers are in such an area and
* write combining or read caching is not desirable:
*
*
* Must be freed with iounmap.
*/
void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size)
void __iomem *ioremap_nocache(unsigned long phys_addr, unsigned long size)
{
unsigned long last_addr;
void __iomem *p = __ioremap(phys_addr, size, _PAGE_PCD | _PAGE_PWT);
if (!p)
return p;
if (!p)
return p;
/* Guaranteed to be > phys_addr, as per __ioremap() */
last_addr = phys_addr + size - 1;
if (last_addr < virt_to_phys(high_memory) - 1) {
struct page *ppage = virt_to_page(__va(phys_addr));
struct page *ppage = virt_to_page(__va(phys_addr));
unsigned long npages;
phys_addr &= PAGE_MASK;
......@@ -135,18 +131,18 @@ void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size)
last_addr = PAGE_ALIGN(last_addr);
/* .. but that's ok, because modulo-2**n arithmetic will make
* the page-aligned "last - first" come out right.
*/
* the page-aligned "last - first" come out right.
*/
npages = (last_addr - phys_addr) >> PAGE_SHIFT;
if (change_page_attr(ppage, npages, PAGE_KERNEL_NOCACHE) < 0) {
iounmap(p);
if (change_page_attr(ppage, npages, PAGE_KERNEL_NOCACHE) < 0) {
iounmap(p);
p = NULL;
}
global_flush_tlb();
}
return p;
return p;
}
EXPORT_SYMBOL(ioremap_nocache);
......@@ -169,10 +165,11 @@ void iounmap(volatile void __iomem *addr)
* of ISA space. So handle that here.
*/
if (addr >= phys_to_virt(ISA_START_ADDRESS) &&
addr < phys_to_virt(ISA_END_ADDRESS))
addr < phys_to_virt(ISA_END_ADDRESS))
return;
addr = (volatile void __iomem *)(PAGE_MASK & (unsigned long __force)addr);
addr = (volatile void __iomem *)
(PAGE_MASK & (unsigned long __force)addr);
/* Use the vm area unlocked, assuming the caller
ensures there isn't another iounmap for the same address
......@@ -187,7 +184,7 @@ void iounmap(volatile void __iomem *addr)
read_unlock(&vmlist_lock);
if (!p) {
printk("iounmap: bad address %p\n", addr);
printk(KERN_ERR "iounmap: bad address %p\n", addr);
dump_stack();
return;
}
......@@ -198,12 +195,12 @@ void iounmap(volatile void __iomem *addr)
get_vm_area_size(p) >> PAGE_SHIFT,
PAGE_KERNEL);
global_flush_tlb();
}
}
/* Finally remove it */
o = remove_vm_area((void *)addr);
BUG_ON(p != o || o == NULL);
kfree(p);
kfree(p);
}
EXPORT_SYMBOL(iounmap);
......@@ -237,7 +234,7 @@ void __init early_ioremap_init(void)
unsigned long *pgd;
if (early_ioremap_debug)
printk("early_ioremap_init()\n");
printk(KERN_DEBUG "early_ioremap_init()\n");
pgd = early_ioremap_pgd(fix_to_virt(FIX_BTMAP_BEGIN));
*pgd = __pa(bm_pte) | _PAGE_TABLE;
......@@ -248,15 +245,16 @@ void __init early_ioremap_init(void)
*/
if (pgd != early_ioremap_pgd(fix_to_virt(FIX_BTMAP_END))) {
WARN_ON(1);
printk("pgd %p != %p\n",
pgd, early_ioremap_pgd(fix_to_virt(FIX_BTMAP_END)));
printk("fix_to_virt(FIX_BTMAP_BEGIN): %08lx\n",
fix_to_virt(FIX_BTMAP_BEGIN));
printk("fix_to_virt(FIX_BTMAP_END): %08lx\n",
fix_to_virt(FIX_BTMAP_END));
printk("FIX_BTMAP_END: %d\n", FIX_BTMAP_END);
printk("FIX_BTMAP_BEGIN: %d\n", FIX_BTMAP_BEGIN);
printk(KERN_WARNING "pgd %p != %p\n",
pgd, early_ioremap_pgd(fix_to_virt(FIX_BTMAP_END)));
printk(KERN_WARNING "fix_to_virt(FIX_BTMAP_BEGIN): %08lx\n",
fix_to_virt(FIX_BTMAP_BEGIN));
printk(KERN_WARNING "fix_to_virt(FIX_BTMAP_END): %08lx\n",
fix_to_virt(FIX_BTMAP_END));
printk(KERN_WARNING "FIX_BTMAP_END: %d\n", FIX_BTMAP_END);
printk(KERN_WARNING "FIX_BTMAP_BEGIN: %d\n",
FIX_BTMAP_BEGIN);
}
}
......@@ -265,7 +263,7 @@ void __init early_ioremap_clear(void)
unsigned long *pgd;
if (early_ioremap_debug)
printk("early_ioremap_clear()\n");
printk(KERN_DEBUG "early_ioremap_clear()\n");
pgd = early_ioremap_pgd(fix_to_virt(FIX_BTMAP_BEGIN));
*pgd = 0;
......@@ -331,10 +329,10 @@ static int __init check_early_ioremap_leak(void)
return 0;
printk(KERN_WARNING
"Debug warning: early ioremap leak of %d areas detected.\n",
early_ioremap_nested);
"Debug warning: early ioremap leak of %d areas detected.\n",
early_ioremap_nested);
printk(KERN_WARNING
"please boot with early_ioremap_debug and report the dmesg.\n");
"please boot with early_ioremap_debug and report the dmesg.\n");
WARN_ON(1);
return 1;
......@@ -351,8 +349,8 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
nesting = early_ioremap_nested;
if (early_ioremap_debug) {
printk("early_ioremap(%08lx, %08lx) [%d] => ",
phys_addr, size, nesting);
printk(KERN_DEBUG "early_ioremap(%08lx, %08lx) [%d] => ",
phys_addr, size, nesting);
dump_stack();
}
......@@ -398,7 +396,7 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
if (early_ioremap_debug)
printk(KERN_CONT "%08lx + %08lx\n", offset, fix_to_virt(idx0));
return (void*) (offset + fix_to_virt(idx0));
return (void *) (offset + fix_to_virt(idx0));
}
void __init early_iounmap(void *addr, unsigned long size)
......@@ -413,7 +411,8 @@ void __init early_iounmap(void *addr, unsigned long size)
WARN_ON(nesting < 0);
if (early_ioremap_debug) {
printk("early_iounmap(%p, %08lx) [%d]\n", addr, size, nesting);
printk(KERN_DEBUG "early_iounmap(%p, %08lx) [%d]\n", addr,
size, nesting);
dump_stack();
}
......
arch/x86/mm/ioremap_64.c
View file @ 91eebf40
/*
* arch/x86_64/mm/ioremap.c
*
* Re-map IO memory to kernel address space so that we can access it.
* This is needed for high PCI addresses that aren't mapped in the
* 640k-1MB IO memory area on PC's
......@@ -33,9 +31,8 @@ EXPORT_SYMBOL(__phys_addr);
* Fix up the linear direct mapping of the kernel to avoid cache attribute
* conflicts.
*/
static int
ioremap_change_attr(unsigned long phys_addr, unsigned long size,
unsigned long flags)
static int ioremap_change_attr(unsigned long phys_addr, unsigned long size,
unsigned long flags)
{
int err = 0;
if (phys_addr + size - 1 < (end_pfn_map << PAGE_SHIFT)) {
......@@ -50,20 +47,18 @@ ioremap_change_attr(unsigned long phys_addr, unsigned long size,
if (!lookup_address(vaddr, &level))
return err;
/*
* Must use a address here and not struct page because the phys addr
* can be a in hole between nodes and not have an memmap entry.
* Must use a address here and not struct page because
* the phys addr can be a in hole between nodes and
* not have an memmap entry.
*/
err = change_page_attr_addr(vaddr,npages,MAKE_GLOBAL(__PAGE_KERNEL|flags));
err = change_page_attr_addr(vaddr,npages,
MAKE_GLOBAL(__PAGE_KERNEL|flags));
if (!err)
global_flush_tlb();
}
return err;
}
/*
* Generic mapping function
*/
/*
* Remap an arbitrary physical address space into the kernel virtual
* address space. Needed when the kernel wants to access high addresses
......@@ -73,10 +68,11 @@ ioremap_change_attr(unsigned long phys_addr, unsigned long size,
* have to convert them into an offset in a page-aligned mapping, but the
* caller shouldn't need to know that small detail.
*/
void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
unsigned long flags)
{
void * addr;
struct vm_struct * area;
void *addr;
struct vm_struct *area;
unsigned long offset, last_addr;
pgprot_t pgprot;
......@@ -130,20 +126,19 @@ EXPORT_SYMBOL(__ioremap);
* make bus memory CPU accessible via the readb/readw/readl/writeb/
* writew/writel functions and the other mmio helpers. The returned
* address is not guaranteed to be usable directly as a virtual
* address.
* address.
*
* This version of ioremap ensures that the memory is marked uncachable
* on the CPU as well as honouring existing caching rules from things like
* the PCI bus. Note that there are other caches and buffers on many
* the PCI bus. Note that there are other caches and buffers on many
* busses. In particular driver authors should read up on PCI writes
*
* It's useful if some control registers are in such an area and
* write combining or read caching is not desirable:
*
*
* Must be freed with iounmap.
*/
void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size)
void __iomem *ioremap_nocache(unsigned long phys_addr, unsigned long size)
{
return __ioremap(phys_addr, size, _PAGE_PCD | _PAGE_PWT);
}
......@@ -159,13 +154,14 @@ void iounmap(volatile void __iomem *addr)
{
struct vm_struct *p, *o;
if (addr <= high_memory)
return;
if (addr <= high_memory)
return;
if (addr >= phys_to_virt(ISA_START_ADDRESS) &&
addr < phys_to_virt(ISA_END_ADDRESS))
addr < phys_to_virt(ISA_END_ADDRESS))
return;
addr = (volatile void __iomem *)(PAGE_MASK & (unsigned long __force)addr);
addr = (volatile void __iomem *)
(PAGE_MASK & (unsigned long __force)addr);
/* Use the vm area unlocked, assuming the caller
ensures there isn't another iounmap for the same address
in parallel. Reuse of the virtual address is prevented by
......@@ -179,7 +175,7 @@ void iounmap(volatile void __iomem *addr)
read_unlock(&vmlist_lock);
if (!p) {
printk("iounmap: bad address %p\n", addr);
printk(KERN_ERR "iounmap: bad address %p\n", addr);
dump_stack();
return;
}
......@@ -191,7 +187,7 @@ void iounmap(volatile void __iomem *addr)
/* Finally remove it */
o = remove_vm_area((void *)addr);
BUG_ON(p != o || o == NULL);
kfree(p);
kfree(p);
}
EXPORT_SYMBOL(iounmap);
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