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sh: Prepare for dynamic PMB support

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To allow the MMU to be switched between 29bit and 32bit mode at runtime
some constants need to swapped for functions that return a runtime
value.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Matt Fleming
2009-10-06 21:22:25 +00:00
committed by Paul Mundt
parent 8bd642b17b
commit 1f69b6af91
7 changed files with 43 additions and 10 deletions
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26
arch/sh/include/asm/pgtable.h
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@@ -75,13 +75,31 @@ static inline unsigned long long neff_sign_extend(unsigned long val)
#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
#define FIRST_USER_ADDRESS 0
#ifdef CONFIG_32BIT
#define PHYS_ADDR_MASK 0xffffffff
#define PHYS_ADDR_MASK29 0x1fffffff
#define PHYS_ADDR_MASK32 0xffffffff
#ifdef CONFIG_PMB
static inline unsigned long phys_addr_mask(void)
{
/* Is the MMU in 29bit mode? */
if (__in_29bit_mode())
return PHYS_ADDR_MASK29;
return PHYS_ADDR_MASK32;
}
#elif CONFIG_32BIT
static inline unsigned long phys_addr_mask(void)
{
return PHYS_ADDR_MASK32;
}
#else
#define PHYS_ADDR_MASK 0x1fffffff
static inline unsigned long phys_addr_mask(void)
{
return PHYS_ADDR_MASK29;
}
#endif
#define PTE_PHYS_MASK (PHYS_ADDR_MASK & PAGE_MASK)
#define PTE_PHYS_MASK (phys_addr_mask() & PAGE_MASK)
#define PTE_FLAGS_MASK (~(PTE_PHYS_MASK) << PAGE_SHIFT)
#ifdef CONFIG_SUPERH32