path: root/arch/sh/include/asm/mmu.h
diff options
authorPaul Mundt <lethal@linux-sh.org>2010-01-13 18:31:48 +0900
committerPaul Mundt <lethal@linux-sh.org>2010-01-13 18:31:48 +0900
commita0ab36689a36e583b6e736f1c99ac8c9aebdad59 (patch)
tree3efc6236d7ec0b5dbeeb311b8cd923c8e1e7f88c /arch/sh/include/asm/mmu.h
parentsh: PVR detection for 2nd cut SH7786. (diff)
sh: fixed PMB mode refactoring.
This introduces some much overdue chainsawing of the fixed PMB support. fixed PMB was introduced initially to work around the fact that dynamic PMB mode was relatively broken, though they were never intended to converge. The main areas where there are differences are whether the system is booted in 29-bit mode or 32-bit mode, and whether legacy mappings are to be preserved. Any system booting in true 32-bit mode will not care about legacy mappings, so these are roughly decoupled. Regardless of the entry point, PMB and 32BIT are directly related as far as the kernel is concerned, so we also switch back to having one select the other. With legacy mappings iterated through and applied in the initialization path it's now possible to finally merge the two implementations and permit dynamic remapping overtop of remaining entries regardless of whether boot mappings are crafted by hand or inherited from the boot loader. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/include/asm/mmu.h')
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/sh/include/asm/mmu.h b/arch/sh/include/asm/mmu.h
index c7426ad9926e..4b0882bf5183 100644
--- a/arch/sh/include/asm/mmu.h
+++ b/arch/sh/include/asm/mmu.h
@@ -65,11 +65,29 @@ struct pmb_entry {
struct pmb_entry *link;
+#ifdef CONFIG_PMB
/* arch/sh/mm/pmb.c */
long pmb_remap(unsigned long virt, unsigned long phys,
unsigned long size, unsigned long flags);
void pmb_unmap(unsigned long addr);
int pmb_init(void);
+static inline long pmb_remap(unsigned long virt, unsigned long phys,
+ unsigned long size, unsigned long flags)
+ return -EINVAL
+static inline void pmb_unmap(unsigned long addr)
+static inline int pmb_init(void)
+ return -ENODEV;
+#endif /* CONFIG_PMB */
#endif /* __ASSEMBLY__ */
#endif /* __MMU_H */