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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/powerpc/include/asm/pte-44x.h | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/include/asm/pte-44x.h')
-rw-r--r-- | ANDROID_3.4.5/arch/powerpc/include/asm/pte-44x.h | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/include/asm/pte-44x.h b/ANDROID_3.4.5/arch/powerpc/include/asm/pte-44x.h deleted file mode 100644 index 4192b9ba..00000000 --- a/ANDROID_3.4.5/arch/powerpc/include/asm/pte-44x.h +++ /dev/null @@ -1,102 +0,0 @@ -#ifndef _ASM_POWERPC_PTE_44x_H -#define _ASM_POWERPC_PTE_44x_H -#ifdef __KERNEL__ - -/* - * Definitions for PPC440 - * - * Because of the 3 word TLB entries to support 36-bit addressing, - * the attribute are difficult to map in such a fashion that they - * are easily loaded during exception processing. I decided to - * organize the entry so the ERPN is the only portion in the - * upper word of the PTE and the attribute bits below are packed - * in as sensibly as they can be in the area below a 4KB page size - * oriented RPN. This at least makes it easy to load the RPN and - * ERPN fields in the TLB. -Matt - * - * This isn't entirely true anymore, at least some bits are now - * easier to move into the TLB from the PTE. -BenH. - * - * Note that these bits preclude future use of a page size - * less than 4KB. - * - * - * PPC 440 core has following TLB attribute fields; - * - * TLB1: - * 0 1 2 3 4 ... 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 - * RPN................................. - - - - - - ERPN....... - * - * TLB2: - * 0 1 2 3 4 ... 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 - * - - - - - - U0 U1 U2 U3 W I M G E - UX UW UR SX SW SR - * - * Newer 440 cores (440x6 as used on AMCC 460EX/460GT) have additional - * TLB2 storage attibute fields. Those are: - * - * TLB2: - * 0...10 11 12 13 14 15 16...31 - * no change WL1 IL1I IL1D IL2I IL2D no change - * - * There are some constrains and options, to decide mapping software bits - * into TLB entry. - * - * - PRESENT *must* be in the bottom three bits because swap cache - * entries use the top 29 bits for TLB2. - * - * - FILE *must* be in the bottom three bits because swap cache - * entries use the top 29 bits for TLB2. - * - * - CACHE COHERENT bit (M) has no effect on original PPC440 cores, - * because it doesn't support SMP. However, some later 460 variants - * have -some- form of SMP support and so I keep the bit there for - * future use - * - * With the PPC 44x Linux implementation, the 0-11th LSBs of the PTE are used - * for memory protection related functions (see PTE structure in - * include/asm-ppc/mmu.h). The _PAGE_XXX definitions in this file map to the - * above bits. Note that the bit values are CPU specific, not architecture - * specific. - * - * The kernel PTE entry holds an arch-dependent swp_entry structure under - * certain situations. In other words, in such situations some portion of - * the PTE bits are used as a swp_entry. In the PPC implementation, the - * 3-24th LSB are shared with swp_entry, however the 0-2nd three LSB still - * hold protection values. That means the three protection bits are - * reserved for both PTE and SWAP entry at the most significant three - * LSBs. - * - * There are three protection bits available for SWAP entry: - * _PAGE_PRESENT - * _PAGE_FILE - * _PAGE_HASHPTE (if HW has) - * - * So those three bits have to be inside of 0-2nd LSB of PTE. - * - */ - -#define _PAGE_PRESENT 0x00000001 /* S: PTE valid */ -#define _PAGE_RW 0x00000002 /* S: Write permission */ -#define _PAGE_FILE 0x00000004 /* S: nonlinear file mapping */ -#define _PAGE_EXEC 0x00000004 /* H: Execute permission */ -#define _PAGE_ACCESSED 0x00000008 /* S: Page referenced */ -#define _PAGE_DIRTY 0x00000010 /* S: Page dirty */ -#define _PAGE_SPECIAL 0x00000020 /* S: Special page */ -#define _PAGE_USER 0x00000040 /* S: User page */ -#define _PAGE_ENDIAN 0x00000080 /* H: E bit */ -#define _PAGE_GUARDED 0x00000100 /* H: G bit */ -#define _PAGE_COHERENT 0x00000200 /* H: M bit */ -#define _PAGE_NO_CACHE 0x00000400 /* H: I bit */ -#define _PAGE_WRITETHRU 0x00000800 /* H: W bit */ - -/* TODO: Add large page lowmem mapping support */ -#define _PMD_PRESENT 0 -#define _PMD_PRESENT_MASK (PAGE_MASK) -#define _PMD_BAD (~PAGE_MASK) - -/* ERPN in a PTE never gets cleared, ignore it */ -#define _PTE_NONE_MASK 0xffffffff00000000ULL - - -#endif /* __KERNEL__ */ -#endif /* _ASM_POWERPC_PTE_44x_H */ |