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powerpc/8xx: Don't set IMMR map anymore at boot

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Only early debug requires IMMR to be mapped early.

No need to set it up and pin it in assembly. Map it
through page tables at udbg init when necessary.

If CONFIG_PIN_TLB_IMMR is selected, pin it once we
don't need the 32 Mb pinned RAM anymore.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/13c1e8539fdf363d3146f4884e5c3c76c6c308b5.1589866984.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy
2020-05-19 05:49:14 +00:00
committed by Michael Ellerman
parent f76c8f6d25
commit 136a9a0f74
5 changed files with 35 additions and 27 deletions
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4
arch/powerpc/mm/mmu_decl.h
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@@ -182,6 +182,10 @@ static inline void mmu_mark_initmem_nx(void) { }
static inline void mmu_mark_rodata_ro(void) { }
#endif
#ifdef CONFIG_PPC_8xx
void __init mmu_mapin_immr(void);
#endif
#ifdef CONFIG_PPC_DEBUG_WX
void ptdump_check_wx(void);
#else