cd3db0c4ca
The RMA (RMO is a misnomer) is a concept specific to ppc64 (in fact server ppc64 though I hijack it on embedded ppc64 for similar purposes) and represents the area of memory that can be accessed in real mode (aka with MMU off), or on embedded, from the exception vectors (which is bolted in the TLB) which pretty much boils down to the same thing. We take that out of the generic MEMBLOCK data structure and move it into arch/powerpc where it belongs, renaming it to "RMA" while at it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
158 lines
4.6 KiB
C
158 lines
4.6 KiB
C
#ifndef _ASM_POWERPC_MMU_H_
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#define _ASM_POWERPC_MMU_H_
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#ifdef __KERNEL__
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#include <linux/types.h>
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#include <asm/asm-compat.h>
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#include <asm/feature-fixups.h>
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/*
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* MMU features bit definitions
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*/
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/*
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* First half is MMU families
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*/
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#define MMU_FTR_HPTE_TABLE ASM_CONST(0x00000001)
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#define MMU_FTR_TYPE_8xx ASM_CONST(0x00000002)
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#define MMU_FTR_TYPE_40x ASM_CONST(0x00000004)
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#define MMU_FTR_TYPE_44x ASM_CONST(0x00000008)
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#define MMU_FTR_TYPE_FSL_E ASM_CONST(0x00000010)
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#define MMU_FTR_TYPE_3E ASM_CONST(0x00000020)
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#define MMU_FTR_TYPE_47x ASM_CONST(0x00000040)
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/*
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* This is individual features
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*/
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/* Enable use of high BAT registers */
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#define MMU_FTR_USE_HIGH_BATS ASM_CONST(0x00010000)
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/* Enable >32-bit physical addresses on 32-bit processor, only used
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* by CONFIG_6xx currently as BookE supports that from day 1
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*/
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#define MMU_FTR_BIG_PHYS ASM_CONST(0x00020000)
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/* Enable use of broadcast TLB invalidations. We don't always set it
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* on processors that support it due to other constraints with the
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* use of such invalidations
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*/
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#define MMU_FTR_USE_TLBIVAX_BCAST ASM_CONST(0x00040000)
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/* Enable use of tlbilx invalidate instructions.
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*/
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#define MMU_FTR_USE_TLBILX ASM_CONST(0x00080000)
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/* This indicates that the processor cannot handle multiple outstanding
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* broadcast tlbivax or tlbsync. This makes the code use a spinlock
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* around such invalidate forms.
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*/
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#define MMU_FTR_LOCK_BCAST_INVAL ASM_CONST(0x00100000)
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/* This indicates that the processor doesn't handle way selection
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* properly and needs SW to track and update the LRU state. This
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* is specific to an errata on e300c2/c3/c4 class parts
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*/
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#define MMU_FTR_NEED_DTLB_SW_LRU ASM_CONST(0x00200000)
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/* This indicates that the processor uses the ISA 2.06 server tlbie
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* mnemonics
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*/
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#define MMU_FTR_TLBIE_206 ASM_CONST(0x00400000)
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/* Enable use of TLB reservation. Processor should support tlbsrx.
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* instruction and MAS0[WQ].
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*/
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#define MMU_FTR_USE_TLBRSRV ASM_CONST(0x00800000)
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/* Use paired MAS registers (MAS7||MAS3, etc.)
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*/
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#define MMU_FTR_USE_PAIRED_MAS ASM_CONST(0x01000000)
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#ifndef __ASSEMBLY__
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#include <asm/cputable.h>
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static inline int mmu_has_feature(unsigned long feature)
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{
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return (cur_cpu_spec->mmu_features & feature);
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}
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extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup;
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/* MMU initialization (64-bit only fo now) */
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extern void early_init_mmu(void);
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extern void early_init_mmu_secondary(void);
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extern void setup_initial_memory_limit(phys_addr_t first_memblock_base,
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phys_addr_t first_memblock_size);
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#ifdef CONFIG_PPC64
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/* This is our real memory area size on ppc64 server, on embedded, we
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* make it match the size our of bolted TLB area
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*/
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extern u64 ppc64_rma_size;
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#endif /* CONFIG_PPC64 */
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#endif /* !__ASSEMBLY__ */
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/* The kernel use the constants below to index in the page sizes array.
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* The use of fixed constants for this purpose is better for performances
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* of the low level hash refill handlers.
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*
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* A non supported page size has a "shift" field set to 0
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*
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* Any new page size being implemented can get a new entry in here. Whether
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* the kernel will use it or not is a different matter though. The actual page
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* size used by hugetlbfs is not defined here and may be made variable
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*
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* Note: This array ended up being a false good idea as it's growing to the
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* point where I wonder if we should replace it with something different,
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* to think about, feedback welcome. --BenH.
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*/
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/* There are #define as they have to be used in assembly
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*
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* WARNING: If you change this list, make sure to update the array of
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* names currently in arch/powerpc/mm/hugetlbpage.c or bad things will
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* happen
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*/
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#define MMU_PAGE_4K 0
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#define MMU_PAGE_16K 1
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#define MMU_PAGE_64K 2
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#define MMU_PAGE_64K_AP 3 /* "Admixed pages" (hash64 only) */
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#define MMU_PAGE_256K 4
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#define MMU_PAGE_1M 5
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#define MMU_PAGE_8M 6
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#define MMU_PAGE_16M 7
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#define MMU_PAGE_256M 8
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#define MMU_PAGE_1G 9
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#define MMU_PAGE_16G 10
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#define MMU_PAGE_64G 11
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#define MMU_PAGE_COUNT 12
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#if defined(CONFIG_PPC_STD_MMU_64)
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/* 64-bit classic hash table MMU */
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# include <asm/mmu-hash64.h>
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#elif defined(CONFIG_PPC_STD_MMU_32)
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/* 32-bit classic hash table MMU */
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# include <asm/mmu-hash32.h>
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#elif defined(CONFIG_40x)
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/* 40x-style software loaded TLB */
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# include <asm/mmu-40x.h>
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#elif defined(CONFIG_44x)
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/* 44x-style software loaded TLB */
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# include <asm/mmu-44x.h>
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#elif defined(CONFIG_PPC_BOOK3E_MMU)
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/* Freescale Book-E software loaded TLB or Book-3e (ISA 2.06+) MMU */
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# include <asm/mmu-book3e.h>
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#elif defined (CONFIG_PPC_8xx)
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/* Motorola/Freescale 8xx software loaded TLB */
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# include <asm/mmu-8xx.h>
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#endif
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_MMU_H_ */
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