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author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2015-12-01 09:06:38 +0530 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-12-14 15:19:09 +1100 |
commit | 17ed9e3192b2b29ad24ffe711fa4b71716ef3ff3 (patch) | |
tree | 8079fd57cf06ad4a5effe982a52c85443e6be456 /arch/powerpc/include/asm/pte-40x.h | |
parent | 1ca7212932862e348f2f9307f35bd309a7da82d8 (diff) | |
download | op-kernel-dev-17ed9e3192b2b29ad24ffe711fa4b71716ef3ff3.zip op-kernel-dev-17ed9e3192b2b29ad24ffe711fa4b71716ef3ff3.tar.gz |
powerpc/booke: Move nohash headers
Move the booke related headers below booke/32 or booke/64
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/pte-40x.h')
-rw-r--r-- | arch/powerpc/include/asm/pte-40x.h | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/arch/powerpc/include/asm/pte-40x.h b/arch/powerpc/include/asm/pte-40x.h deleted file mode 100644 index 486b1ef..0000000 --- a/arch/powerpc/include/asm/pte-40x.h +++ /dev/null @@ -1,64 +0,0 @@ -#ifndef _ASM_POWERPC_PTE_40x_H -#define _ASM_POWERPC_PTE_40x_H -#ifdef __KERNEL__ - -/* - * At present, all PowerPC 400-class processors share a similar TLB - * architecture. The instruction and data sides share a unified, - * 64-entry, fully-associative TLB which is maintained totally under - * software control. In addition, the instruction side has a - * hardware-managed, 4-entry, fully-associative TLB which serves as a - * first level to the shared TLB. These two TLBs are known as the UTLB - * and ITLB, respectively (see "mmu.h" for definitions). - * - * There are several potential gotchas here. The 40x hardware TLBLO - * field looks like this: - * - * 0 1 2 3 4 ... 18 19 20 21 22 23 24 25 26 27 28 29 30 31 - * RPN..................... 0 0 EX WR ZSEL....... W I M G - * - * Where possible we make the Linux PTE bits match up with this - * - * - bits 20 and 21 must be cleared, because we use 4k pages (40x can - * support down to 1k pages), this is done in the TLBMiss exception - * handler. - * - We use only zones 0 (for kernel pages) and 1 (for user pages) - * of the 16 available. Bit 24-26 of the TLB are cleared in the TLB - * miss handler. Bit 27 is PAGE_USER, thus selecting the correct - * zone. - * - PRESENT *must* be in the bottom two bits because swap cache - * entries use the top 30 bits. Because 40x doesn't support SMP - * anyway, M is irrelevant so we borrow it for PAGE_PRESENT. Bit 30 - * is cleared in the TLB miss handler before the TLB entry is loaded. - * - All other bits of the PTE are loaded into TLBLO without - * modification, leaving us only the bits 20, 21, 24, 25, 26, 30 for - * software PTE bits. We actually use use bits 21, 24, 25, and - * 30 respectively for the software bits: ACCESSED, DIRTY, RW, and - * PRESENT. - */ - -#define _PAGE_GUARDED 0x001 /* G: page is guarded from prefetch */ -#define _PAGE_PRESENT 0x002 /* software: PTE contains a translation */ -#define _PAGE_NO_CACHE 0x004 /* I: caching is inhibited */ -#define _PAGE_WRITETHRU 0x008 /* W: caching is write-through */ -#define _PAGE_USER 0x010 /* matches one of the zone permission bits */ -#define _PAGE_SPECIAL 0x020 /* software: Special page */ -#define _PAGE_RW 0x040 /* software: Writes permitted */ -#define _PAGE_DIRTY 0x080 /* software: dirty page */ -#define _PAGE_HWWRITE 0x100 /* hardware: Dirty & RW, set in exception */ -#define _PAGE_EXEC 0x200 /* hardware: EX permission */ -#define _PAGE_ACCESSED 0x400 /* software: R: page referenced */ - -#define _PMD_PRESENT 0x400 /* PMD points to page of PTEs */ -#define _PMD_BAD 0x802 -#define _PMD_SIZE 0x0e0 /* size field, != 0 for large-page PMD entry */ -#define _PMD_SIZE_4M 0x0c0 -#define _PMD_SIZE_16M 0x0e0 - -#define PMD_PAGE_SIZE(pmdval) (1024 << (((pmdval) & _PMD_SIZE) >> 4)) - -/* Until my rework is finished, 40x still needs atomic PTE updates */ -#define PTE_ATOMIC_UPDATES 1 - -#endif /* __KERNEL__ */ -#endif /* _ASM_POWERPC_PTE_40x_H */ |