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Orion: only map peripheral register space once
Save some TLB entries by making ioremap() return pointers into the boot-time Orion peripheral iotable mapping whenever someone tries to ioremap any part of the Orion peripheral register space. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Reviewed-by: Nicolas Pitre <nico@marvell.com> Reviewed-by: Tzachi Perelstein <tzachi@marvell.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Nicolas Pitre <nico@marvell.com>
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@ -16,11 +16,37 @@
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#define IO_SPACE_LIMIT 0xffffffff
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#define IO_SPACE_REMAP ORION_PCI_SYS_IO_BASE
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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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if (mtype == MT_DEVICE && size && paddr >= ORION_REGS_PHYS_BASE &&
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paddr + size <= ORION_REGS_PHYS_BASE + ORION_REGS_SIZE) {
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retval = (void __iomem *)ORION_REGS_VIRT_BASE +
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(paddr - ORION_REGS_PHYS_BASE);
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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 *)ORION_REGS_VIRT_BASE ||
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addr >= (void __iomem *)(ORION_REGS_VIRT_BASE + ORION_REGS_SIZE))
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__iounmap(addr);
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}
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static inline void __iomem *__io(unsigned long addr)
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{
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return (void __iomem *)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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