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powerpc: Untangle fixmap.h and pgtable.h and mmu.h

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fixmap.h need pgtable.h for [un]map_kernel_page()

pgtable.h need fixmap.h for FIXADDR_TOP.

Untangle the two files by moving FIXADDR_TOP into pgtable.h

Also move VIRT_IMMR_BASE to fixmap.h to avoid fixmap.h in mmu.h

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/5eba12392a018be28ad0a02ed844767b132589e7.1695659959.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy
2023-09-25 20:31:21 +02:00
committed by Michael Ellerman
parent da9554e0fe
commit d3e0179672
11 changed files with 29 additions and 15 deletions
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9
arch/powerpc/include/asm/book3s/32/pgtable.h
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@@ -170,7 +170,14 @@ void unmap_kernel_page(unsigned long va);
* value (for now) on others, from where we can start layout kernel
* virtual space that goes below PKMAP and FIXMAP
*/
#include <asm/fixmap.h>
#define FIXADDR_SIZE 0
#ifdef CONFIG_KASAN
#include <asm/kasan.h>
#define FIXADDR_TOP (KASAN_SHADOW_START - PAGE_SIZE)
#else
#define FIXADDR_TOP ((unsigned long)(-PAGE_SIZE))
#endif
/*
* ioremap_bot starts at that address. Early ioremaps move down from there,