forked from Minki/linux
797b2c80e8
Just like commit 1419468ab5, let's save some TLB entries by making
ioremap() return pointers into the boot-time Kirkwood peripheral
iotable mapping whenever someone tries to ioremap any part of the Kirkwood
peripheral register space.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/*
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* arch/arm/mach-kirkwood/include/mach/io.h
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#ifndef __ASM_ARCH_IO_H
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#define __ASM_ARCH_IO_H
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#include "kirkwood.h"
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#define IO_SPACE_LIMIT 0xffffffff
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static inline void __iomem *__io(unsigned long addr)
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{
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return (void __iomem *)((addr - KIRKWOOD_PCIE_IO_PHYS_BASE)
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+ KIRKWOOD_PCIE_IO_VIRT_BASE);
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}
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static inline void __iomem *
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__arch_ioremap(unsigned long paddr, size_t size, unsigned int mtype)
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{
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void __iomem *retval;
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unsigned long offs = paddr - KIRKWOOD_REGS_PHYS_BASE;
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if (mtype == MT_DEVICE && size && offs < KIRKWOOD_REGS_SIZE &&
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size <= KIRKWOOD_REGS_SIZE && offs + size <= KIRKWOOD_REGS_SIZE) {
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retval = (void __iomem *)KIRKWOOD_REGS_VIRT_BASE + offs;
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} else {
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retval = __arm_ioremap(paddr, size, mtype);
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}
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return retval;
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}
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static inline void
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__arch_iounmap(void __iomem *addr)
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{
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if (addr < (void __iomem *)KIRKWOOD_REGS_VIRT_BASE ||
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addr >= (void __iomem *)(KIRKWOOD_REGS_VIRT_BASE + KIRKWOOD_REGS_SIZE))
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__iounmap(addr);
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}
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#define __arch_ioremap(p, s, m) __arch_ioremap(p, s, m)
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#define __arch_iounmap(a) __arch_iounmap(a)
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#define __io(a) __io(a)
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#define __mem_pci(a) (a)
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#endif
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