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MIPS: move ioremap_prot und iounmap out of line

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Neither of these interfaces is anywhere near the fast path.  Move them
out of line and avoid exposing implementation details to the drivers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Christoph Hellwig
2020-04-16 17:00:10 +02:00
committed by Thomas Bogendoerfer
parent 8e487c153c
commit d257b8fe17
4 changed files with 49 additions and 107 deletions
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45
arch/mips/mm/ioremap.c
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@@ -17,6 +17,10 @@
#include <asm/cacheflush.h>
#include <asm/io.h>
#include <asm/tlbflush.h>
#include <ioremap.h>
#define IS_LOW512(addr) (!((phys_addr_t)(addr) & (phys_addr_t) ~0x1fffffffULL))
#define IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == CKSEG1)
static inline void remap_area_pte(pte_t * pte, unsigned long address,
phys_addr_t size, phys_addr_t phys_addr, unsigned long flags)
@@ -118,27 +122,25 @@ static int __ioremap_check_ram(unsigned long start_pfn, unsigned long nr_pages,
}
/*
* 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.
* ioremap_prot - map bus memory into CPU space
* @phys_addr: bus address of the memory
* @size: size of the resource to map
*
* 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.
* ioremap_prot gives the caller control over cache coherency attributes (CCA)
*/
#define IS_LOW512(addr) (!((phys_addr_t)(addr) & (phys_addr_t) ~0x1fffffffULL))
void __iomem * __ioremap(phys_addr_t phys_addr, phys_addr_t size, unsigned long flags)
void __iomem *ioremap_prot(phys_addr_t phys_addr, unsigned long size,
unsigned long prot_val)
{
unsigned long flags = prot_val & _CACHE_MASK;
unsigned long offset, pfn, last_pfn;
struct vm_struct * area;
struct vm_struct *area;
phys_addr_t last_addr;
void * addr;
void *addr;
void __iomem *cpu_addr;
cpu_addr = plat_ioremap(phys_addr, size, flags);
if (cpu_addr)
return cpu_addr;
phys_addr = fixup_bigphys_addr(phys_addr, size);
@@ -189,14 +191,13 @@ void __iomem * __ioremap(phys_addr_t phys_addr, phys_addr_t size, unsigned long
return (void __iomem *) (offset + (char *)addr);
}
EXPORT_SYMBOL(ioremap_prot);
#define IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == CKSEG1)
void __iounmap(const volatile void __iomem *addr)
void iounmap(const volatile void __iomem *addr)
{
struct vm_struct *p;
if (IS_KSEG1(addr))
if (plat_iounmap(addr) || IS_KSEG1(addr))
return;
p = remove_vm_area((void *) (PAGE_MASK & (unsigned long __force) addr));
@@ -205,6 +206,4 @@ void __iounmap(const volatile void __iomem *addr)
kfree(p);
}
EXPORT_SYMBOL(__ioremap);
EXPORT_SYMBOL(__iounmap);
EXPORT_SYMBOL(iounmap);