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nios2: change virt_to_phys to use physaddr_mask in global data 

As virt_to_phys() is used a lot in DMA transfer, change it
to use physaddr_mask in global data. This will save an "if"
statement and get a little faster.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Acked-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Thomas Chou 2015-10-27 09:02:17 +08:00
parent 1cda48f333
commit 2de4823dc0
3 changed files with 3 additions and 4 deletions
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1
arch/nios2/cpu/cpu.c
View File

@ -119,6 +119,7 @@ static int altera_nios2_probe(struct udevice *dev)
"altr,has-mmu", 0);
gd->arch.io_region_base = gd->arch.has_mmu ? 0xe0000000 : 0x80000000;
gd->arch.mem_region_base = gd->arch.has_mmu ? 0xc0000000 : 0x00000000;
gd->arch.physaddr_mask = gd->arch.has_mmu ? 0x1fffffff : 0x7fffffff;
return 0;
}

1
arch/nios2/include/asm/global_data.h
View File

@ -19,6 +19,7 @@ struct arch_global_data {
int has_mmu;
u32 io_region_base;
u32 mem_region_base;
u32 physaddr_mask;
};
#include <asm-generic/global_data.h>

5
arch/nios2/include/asm/io.h
View File

@ -44,10 +44,7 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
static inline phys_addr_t virt_to_phys(void * vaddr)
{
DECLARE_GLOBAL_DATA_PTR;
if (gd->arch.has_mmu)
return (phys_addr_t)vaddr & 0x1fffffff;
else
return (phys_addr_t)vaddr & 0x7fffffff;
return (phys_addr_t)vaddr & gd->arch.physaddr_mask;
}
static inline void *ioremap(unsigned long physaddr, unsigned long size)