diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-ppc64/abs_addr.h |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-ppc64/abs_addr.h')
-rw-r--r-- | include/asm-ppc64/abs_addr.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/include/asm-ppc64/abs_addr.h b/include/asm-ppc64/abs_addr.h new file mode 100644 index 00000000000..6d4e8e78705 --- /dev/null +++ b/include/asm-ppc64/abs_addr.h @@ -0,0 +1,108 @@ +#ifndef _ABS_ADDR_H +#define _ABS_ADDR_H + +#include <linux/config.h> + +/* + * c 2001 PPC 64 Team, IBM Corp + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <asm/types.h> +#include <asm/page.h> +#include <asm/prom.h> +#include <asm/lmb.h> + +typedef u32 msChunks_entry; +struct msChunks { + unsigned long num_chunks; + unsigned long chunk_size; + unsigned long chunk_shift; + unsigned long chunk_mask; + msChunks_entry *abs; +}; + +extern struct msChunks msChunks; + +extern unsigned long msChunks_alloc(unsigned long, unsigned long, unsigned long); +extern unsigned long reloc_offset(void); + +#ifdef CONFIG_MSCHUNKS + +static inline unsigned long +chunk_to_addr(unsigned long chunk) +{ + unsigned long offset = reloc_offset(); + struct msChunks *_msChunks = PTRRELOC(&msChunks); + + return chunk << _msChunks->chunk_shift; +} + +static inline unsigned long +addr_to_chunk(unsigned long addr) +{ + unsigned long offset = reloc_offset(); + struct msChunks *_msChunks = PTRRELOC(&msChunks); + + return addr >> _msChunks->chunk_shift; +} + +static inline unsigned long +chunk_offset(unsigned long addr) +{ + unsigned long offset = reloc_offset(); + struct msChunks *_msChunks = PTRRELOC(&msChunks); + + return addr & _msChunks->chunk_mask; +} + +static inline unsigned long +abs_chunk(unsigned long pchunk) +{ + unsigned long offset = reloc_offset(); + struct msChunks *_msChunks = PTRRELOC(&msChunks); + if ( pchunk >= _msChunks->num_chunks ) { + return pchunk; + } + return PTRRELOC(_msChunks->abs)[pchunk]; +} + +/* A macro so it can take pointers or unsigned long. */ +#define phys_to_abs(pa) \ + ({ unsigned long _pa = (unsigned long)(pa); \ + chunk_to_addr(abs_chunk(addr_to_chunk(_pa))) + chunk_offset(_pa); \ + }) + +static inline unsigned long +physRpn_to_absRpn(unsigned long rpn) +{ + unsigned long pa = rpn << PAGE_SHIFT; + unsigned long aa = phys_to_abs(pa); + return (aa >> PAGE_SHIFT); +} + +/* A macro so it can take pointers or unsigned long. */ +#define abs_to_phys(aa) lmb_abs_to_phys((unsigned long)(aa)) + +#else /* !CONFIG_MSCHUNKS */ + +#define chunk_to_addr(chunk) ((unsigned long)(chunk)) +#define addr_to_chunk(addr) (addr) +#define chunk_offset(addr) (0) +#define abs_chunk(pchunk) (pchunk) + +#define phys_to_abs(pa) (pa) +#define physRpn_to_absRpn(rpn) (rpn) +#define abs_to_phys(aa) (aa) + +#endif /* !CONFIG_MSCHUNKS */ + +/* Convenience macros */ +#define virt_to_abs(va) phys_to_abs(__pa(va)) +#define abs_to_virt(aa) __va(abs_to_phys(aa)) + +#endif /* _ABS_ADDR_H */ |