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sh: Support fixed 32-bit PMB mappings from bootloader.

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This provides a method for supporting fixed PMB mappings inherited from
the bootloader, as an alternative to the dynamic PMB mapping currently
used by the kernel. In the future these methods will be combined.

P1/P2 area is handled like a regular 29-bit physical address, and local
bus device are assigned P3 area addresses.

Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Yoshihiro Shimoda
2009-03-10 15:49:54 +09:00
committed by Paul Mundt
parent a29b99ecce
commit 2f47f44790
9 changed files with 106 additions and 19 deletions
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4
arch/sh/include/asm/io.h
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@ -238,7 +238,7 @@ extern void onchip_unmap(unsigned long vaddr);
static inline void __iomem *
__ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
{
#ifdef CONFIG_SUPERH32
#if defined(CONFIG_SUPERH32) && !defined(CONFIG_PMB_FIXED)
unsigned long last_addr = offset + size - 1;
#endif
void __iomem *ret;
@ -247,7 +247,7 @@ __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
if (ret)
return ret;
#ifdef CONFIG_SUPERH32
#if defined(CONFIG_SUPERH32) && !defined(CONFIG_PMB_FIXED)
/*
* For P1 and P2 space this is trivial, as everything is already
* mapped. Uncached access for P1 addresses are done through P2.