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powerpc: Minor cleanups of kernel virt address space definitions

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Make FIXADDR_TOP a compile time constant and cleanup a
couple of definitions relative to the layout of the kernel
address space on ppc32. We also print out that layout at
boot time for debugging purposes.

This is a pre-requisite for properly fixing non-coherent
DMA allocactions.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
2009-05-27 13:44:50 +10:00
parent b16e7766d6
commit f637a49e50
5 changed files with 37 additions and 12 deletions
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8
arch/powerpc/mm/init_32.c
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@@ -168,12 +168,8 @@ void __init MMU_init(void)
ppc_md.progress("MMU:mapin", 0x301);
mapin_ram();
#ifdef CONFIG_HIGHMEM
ioremap_base = PKMAP_BASE;
#else
ioremap_base = 0xfe000000UL; /* for now, could be 0xfffff000 */
#endif /* CONFIG_HIGHMEM */
ioremap_bot = ioremap_base;
/* Initialize early top-down ioremap allocator */
ioremap_bot = IOREMAP_TOP;
/* Map in I/O resources */
if (ppc_md.progress)