34c8f6961f
Chunks are 256KB, so use constants for the size/shift/mask, rather than getting them from the msChunks struct. The iSeries debugger (??) might still need access to the values in the msChunks struct, so we keep them around for now, but set them from the constant values. Replace msChunks_entry typedef with regular u32. Simplify msChunks_alloc() to manipulate klimit directly, rather than via a parameter. Move msChunks_alloc() and msChunks into iSeries_setup.c, as that's where they're used. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
#ifndef _ABS_ADDR_H
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#define _ABS_ADDR_H
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#include <linux/config.h>
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/*
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* c 2001 PPC 64 Team, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/types.h>
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#include <asm/page.h>
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#include <asm/prom.h>
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#include <asm/lmb.h>
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struct msChunks {
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unsigned long num_chunks;
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unsigned long chunk_size;
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unsigned long chunk_shift;
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unsigned long chunk_mask;
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u32 *abs;
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};
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extern struct msChunks msChunks;
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#ifdef CONFIG_MSCHUNKS
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/* Chunks are 256 KB */
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#define MSCHUNKS_CHUNK_SHIFT (18)
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#define MSCHUNKS_CHUNK_SIZE (1UL << MSCHUNKS_CHUNK_SHIFT)
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#define MSCHUNKS_OFFSET_MASK (MSCHUNKS_CHUNK_SIZE - 1)
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static inline unsigned long chunk_to_addr(unsigned long chunk)
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{
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return chunk << MSCHUNKS_CHUNK_SHIFT;
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}
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static inline unsigned long addr_to_chunk(unsigned long addr)
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{
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return addr >> MSCHUNKS_CHUNK_SHIFT;
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}
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static inline unsigned long chunk_offset(unsigned long addr)
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{
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return addr & MSCHUNKS_OFFSET_MASK;
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}
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static inline unsigned long abs_chunk(unsigned long pchunk)
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{
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if (pchunk >= msChunks.num_chunks)
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return pchunk;
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return msChunks.abs[pchunk];
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}
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/* A macro so it can take pointers or unsigned long. */
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#define phys_to_abs(pa) \
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({ unsigned long _pa = (unsigned long)(pa); \
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chunk_to_addr(abs_chunk(addr_to_chunk(_pa))) + chunk_offset(_pa); \
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})
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static inline unsigned long
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physRpn_to_absRpn(unsigned long rpn)
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{
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unsigned long pa = rpn << PAGE_SHIFT;
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unsigned long aa = phys_to_abs(pa);
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return (aa >> PAGE_SHIFT);
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}
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/* A macro so it can take pointers or unsigned long. */
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#define abs_to_phys(aa) lmb_abs_to_phys((unsigned long)(aa))
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#else /* !CONFIG_MSCHUNKS */
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#define chunk_to_addr(chunk) ((unsigned long)(chunk))
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#define addr_to_chunk(addr) (addr)
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#define chunk_offset(addr) (0)
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#define abs_chunk(pchunk) (pchunk)
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#define phys_to_abs(pa) (pa)
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#define physRpn_to_absRpn(rpn) (rpn)
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#define abs_to_phys(aa) (aa)
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#endif /* !CONFIG_MSCHUNKS */
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/* Convenience macros */
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#define virt_to_abs(va) phys_to_abs(__pa(va))
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#define abs_to_virt(aa) __va(abs_to_phys(aa))
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#endif /* _ABS_ADDR_H */
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