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MIPS: BCM63XX: Hook up plat_ioremap to intercept soc registers remapping.

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Internal SOC registers can be directly accessed, no need to waste a
TLB entry.

Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2890/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Maxime Bizon 2011-11-04 19:09:26 +01:00 committed by Ralf Baechle
parent 5611cc4572
commit 455a503f4c
1 changed files with 38 additions and 0 deletions
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38
arch/mips/include/asm/mach-bcm63xx/ioremap.h Normal file
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#ifndef BCM63XX_IOREMAP_H_
#define BCM63XX_IOREMAP_H_
#include <bcm63xx_cpu.h>
static inline phys_t fixup_bigphys_addr(phys_t phys_addr, phys_t size)
{
return phys_addr;
}
static inline int is_bcm63xx_internal_registers(phys_t offset)
{
switch (bcm63xx_get_cpu_id()) {
case BCM6338_CPU_ID:
case BCM6345_CPU_ID:
case BCM6348_CPU_ID:
case BCM6358_CPU_ID:
if (offset >= 0xfff00000)
return 1;
break;
}
return 0;
}
static inline void __iomem *plat_ioremap(phys_t offset, unsigned long size,
unsigned long flags)
{
if (is_bcm63xx_internal_registers(offset))
return (void __iomem *)offset;
return NULL;
}
static inline int plat_iounmap(const volatile void __iomem *addr)
{
return is_bcm63xx_internal_registers((unsigned long)addr);
}
#endif /* BCM63XX_IOREMAP_H_ */