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Merge commit 'kumar/kumar-mmu'

This commit is contained in:
Benjamin Herrenschmidt 2008-10-02 16:11:49 +10:00
parent 9f5494b797 4ee7084eb1
commit c9b59da130
15 changed files with 216 additions and 47 deletions
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2
arch/powerpc/include/asm/highmem.h
View File

@ -84,7 +84,7 @@ static inline void *kmap_atomic_prot(struct page *page, enum km_type type, pgpro
#ifdef CONFIG_DEBUG_HIGHMEM
BUG_ON(!pte_none(*(kmap_pte-idx)));
#endif
set_pte_at(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot));
__set_pte_at(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot));
flush_tlb_page(NULL, vaddr);
return (void*) vaddr;

2
arch/powerpc/include/asm/io.h
View File

@ -711,7 +711,7 @@ static inline void * phys_to_virt(unsigned long address)
/*
* Change "struct page" to physical address.
*/
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#define page_to_phys(page) ((phys_addr_t)page_to_pfn(page) << PAGE_SHIFT)
/* We do NOT want virtual merging, it would put too much pressure on
* our iommu allocator. Instead, we want drivers to be smart enough

8
arch/powerpc/include/asm/page_32.h
View File

@ -13,10 +13,16 @@
#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
#endif
#ifdef CONFIG_PTE_64BIT
#define PTE_FLAGS_OFFSET 4 /* offset of PTE flags, in bytes */
#else
#define PTE_FLAGS_OFFSET 0
#endif
#ifndef __ASSEMBLY__
/*
* The basic type of a PTE - 64 bits for those CPUs with > 32 bit
* physical addressing. For now this just the IBM PPC440.
* physical addressing.
*/
#ifdef CONFIG_PTE_64BIT
typedef unsigned long long pte_basic_t;

59
arch/powerpc/include/asm/pgtable-ppc32.h
View File

@ -261,6 +261,7 @@ extern int icache_44x_need_flush;
#define _PAGE_HWEXEC 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 */
@ -276,6 +277,7 @@ extern int icache_44x_need_flush;
/* ERPN in a PTE never gets cleared, ignore it */
#define _PTE_NONE_MASK 0xffffffff00000000ULL
#define __HAVE_ARCH_PTE_SPECIAL
#elif defined(CONFIG_FSL_BOOKE)
/*
@ -305,6 +307,7 @@ extern int icache_44x_need_flush;
#define _PAGE_COHERENT 0x00100 /* H: M bit */
#define _PAGE_NO_CACHE 0x00200 /* H: I bit */
#define _PAGE_WRITETHRU 0x00400 /* H: W bit */
#define _PAGE_SPECIAL 0x00800 /* S: Special page */
#ifdef CONFIG_PTE_64BIT
/* ERPN in a PTE never gets cleared, ignore it */
@ -315,6 +318,8 @@ extern int icache_44x_need_flush;
#define _PMD_PRESENT_MASK (PAGE_MASK)
#define _PMD_BAD (~PAGE_MASK)
#define __HAVE_ARCH_PTE_SPECIAL
#elif defined(CONFIG_8xx)
/* Definitions for 8xx embedded chips. */
#define _PAGE_PRESENT 0x0001 /* Page is valid */
@ -362,8 +367,14 @@ extern int icache_44x_need_flush;
#define _PAGE_ACCESSED 0x100 /* R: page referenced */
#define _PAGE_EXEC 0x200 /* software: i-cache coherency required */
#define _PAGE_RW 0x400 /* software: user write access allowed */
#define _PAGE_SPECIAL 0x800 /* software: Special page */
#ifdef CONFIG_PTE_64BIT
/* We never clear the high word of the pte */
#define _PTE_NONE_MASK (0xffffffff00000000ULL | _PAGE_HASHPTE)
#else
#define _PTE_NONE_MASK _PAGE_HASHPTE
#endif
#define _PMD_PRESENT 0
#define _PMD_PRESENT_MASK (PAGE_MASK)
@ -372,6 +383,8 @@ extern int icache_44x_need_flush;
/* Hash table based platforms need atomic updates of the linux PTE */
#define PTE_ATOMIC_UPDATES 1
#define __HAVE_ARCH_PTE_SPECIAL
#endif
/*
@ -404,6 +417,9 @@ extern int icache_44x_need_flush;
#ifndef _PAGE_WRITETHRU
#define _PAGE_WRITETHRU 0
#endif
#ifndef _PAGE_SPECIAL
#define _PAGE_SPECIAL 0
#endif
#ifndef _PMD_PRESENT_MASK
#define _PMD_PRESENT_MASK _PMD_PRESENT
#endif
@ -517,7 +533,8 @@ extern unsigned long bad_call_to_PMD_PAGE_SIZE(void);
#define pte_none(pte) ((pte_val(pte) & ~_PTE_NONE_MASK) == 0)
#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
#define pte_clear(mm,addr,ptep) do { set_pte_at((mm), (addr), (ptep), __pte(0)); } while (0)
#define pte_clear(mm, addr, ptep) \
do { pte_update(ptep, ~_PAGE_HASHPTE, 0); } while (0)
#define pmd_none(pmd) (!pmd_val(pmd))
#define pmd_bad(pmd) (pmd_val(pmd) & _PMD_BAD)
@ -533,7 +550,7 @@ static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; }
static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
static inline int pte_special(pte_t pte) { return 0; }
static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; }
static inline void pte_uncache(pte_t pte) { pte_val(pte) |= _PAGE_NO_CACHE; }
static inline void pte_cache(pte_t pte) { pte_val(pte) &= ~_PAGE_NO_CACHE; }
@ -552,7 +569,7 @@ static inline pte_t pte_mkdirty(pte_t pte) {
static inline pte_t pte_mkyoung(pte_t pte) {
pte_val(pte) |= _PAGE_ACCESSED; return pte; }
static inline pte_t pte_mkspecial(pte_t pte) {
return pte; }
pte_val(pte) |= _PAGE_SPECIAL; return pte; }
static inline unsigned long pte_pgprot(pte_t pte)
{
return __pgprot(pte_val(pte)) & PAGE_PROT_BITS;
@ -575,6 +592,10 @@ extern int flush_hash_pages(unsigned context, unsigned long va,
extern void add_hash_page(unsigned context, unsigned long va,
unsigned long pmdval);
/* Flush an entry from the TLB/hash table */
extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
unsigned long address);
/*
* Atomic PTE updates.
*
@ -612,9 +633,6 @@ static inline unsigned long pte_update(pte_t *p,
return old;
}
#else /* CONFIG_PTE_64BIT */
/* TODO: Change that to only modify the low word and move set_pte_at()
* out of line
*/
static inline unsigned long long pte_update(pte_t *p,
unsigned long clr,
unsigned long set)
@ -652,14 +670,35 @@ static inline unsigned long long pte_update(pte_t *p,
* On machines which use an MMU hash table we avoid changing the
* _PAGE_HASHPTE bit.
*/
static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte)
{
#if (_PAGE_HASHPTE != 0) && defined(CONFIG_SMP) && !defined(CONFIG_PTE_64BIT)
pte_update(ptep, ~_PAGE_HASHPTE, pte_val(pte) & ~_PAGE_HASHPTE);
#elif defined(CONFIG_PTE_64BIT) && defined(CONFIG_SMP)
#if _PAGE_HASHPTE != 0
if (pte_val(*ptep) & _PAGE_HASHPTE)
flush_hash_entry(mm, ptep, addr);
#endif
__asm__ __volatile__("\
stw%U0%X0 %2,%0\n\
eieio\n\
stw%U0%X0 %L2,%1"
: "=m" (*ptep), "=m" (*((unsigned char *)ptep+4))
: "r" (pte) : "memory");
#else
*ptep = (*ptep & _PAGE_HASHPTE) | (pte & ~_PAGE_HASHPTE);
#endif
}
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte)
{
#if _PAGE_HASHPTE != 0
pte_update(ptep, ~_PAGE_HASHPTE, pte_val(pte) & ~_PAGE_HASHPTE);
#else
*ptep = pte;
#if defined(CONFIG_PTE_64BIT) && defined(CONFIG_SMP)
WARN_ON(pte_present(*ptep));
#endif
__set_pte_at(mm, addr, ptep, pte);
}
/*

7
arch/powerpc/include/asm/reg_booke.h
View File

@ -109,6 +109,7 @@
#define SPRN_EVPR 0x3D6 /* Exception Vector Prefix Register */
#define SPRN_L1CSR0 0x3F2 /* L1 Cache Control and Status Register 0 */
#define SPRN_L1CSR1 0x3F3 /* L1 Cache Control and Status Register 1 */
#define SPRN_MMUCSR0 0x3F4 /* MMU Control and Status Register 0 */
#define SPRN_PIT 0x3DB /* Programmable Interval Timer */
#define SPRN_BUCSR 0x3F5 /* Branch Unit Control and Status */
#define SPRN_L2CSR0 0x3F9 /* L2 Data Cache Control and Status Register 0 */
@ -410,6 +411,12 @@
#define L2CSR0_L2LOA 0x00000080 /* L2 Cache Lock Overflow Allocate */
#define L2CSR0_L2LO 0x00000020 /* L2 Cache Lock Overflow */
/* Bit definitions for MMUCSR0 */
#define MMUCSR0_TLB1FI 0x00000002 /* TLB1 Flash invalidate */
#define MMUCSR0_TLB0FI 0x00000004 /* TLB0 Flash invalidate */
#define MMUCSR0_TLB2FI 0x00000040 /* TLB2 Flash invalidate */
#define MMUCSR0_TLB3FI 0x00000020 /* TLB3 Flash invalidate */
/* Bit definitions for SGR. */
#define SGR_NORMAL 0 /* Speculative fetching allowed. */
#define SGR_GUARDED 1 /* Speculative fetching disallowed. */

13
arch/powerpc/include/asm/tlbflush.h
View File

@ -29,6 +29,9 @@
#include <linux/mm.h>
extern void _tlbie(unsigned long address, unsigned int pid);
extern void _tlbil_all(void);
extern void _tlbil_pid(unsigned int pid);
extern void _tlbil_va(unsigned long address, unsigned int pid);
#if defined(CONFIG_40x) || defined(CONFIG_8xx)
#define _tlbia() asm volatile ("tlbia; sync" : : : "memory")
@ -38,31 +41,31 @@ extern void _tlbia(void);
static inline void flush_tlb_mm(struct mm_struct *mm)
{
_tlbia();
_tlbil_pid(mm->context.id);
}
static inline void flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
_tlbie(vmaddr, vma ? vma->vm_mm->context.id : 0);
_tlbil_va(vmaddr, vma ? vma->vm_mm->context.id : 0);
}
static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
unsigned long vmaddr)
{
_tlbie(vmaddr, vma ? vma->vm_mm->context.id : 0);
flush_tlb_page(vma, vmaddr);
}
static inline void flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
_tlbia();
_tlbil_pid(vma->vm_mm->context.id);
}
static inline void flush_tlb_kernel_range(unsigned long start,
unsigned long end)
{
_tlbia();
_tlbil_pid(0);
}
#elif defined(CONFIG_PPC32)

1
arch/powerpc/kernel/asm-offsets.c
View File

@ -352,6 +352,7 @@ int main(void)
#endif
DEFINE(PGD_TABLE_SIZE, PGD_TABLE_SIZE);
DEFINE(PTE_SIZE, sizeof(pte_t));
#ifdef CONFIG_KVM
DEFINE(TLBE_BYTES, sizeof(struct tlbe));

4
arch/powerpc/kernel/head_32.S
View File

@ -369,13 +369,13 @@ i##n: \
DataAccess:
EXCEPTION_PROLOG
mfspr r10,SPRN_DSISR
stw r10,_DSISR(r11)
andis. r0,r10,0xa470 /* weird error? */
bne 1f /* if not, try to put a PTE */
mfspr r4,SPRN_DAR /* into the hash table */
rlwinm r3,r10,32-15,21,21 /* DSISR_STORE -> _PAGE_RW */
bl hash_page
1: stw r10,_DSISR(r11)
mr r5,r10
1: lwz r5,_DSISR(r11) /* get DSISR value */
mfspr r4,SPRN_DAR
EXC_XFER_EE_LITE(0x300, handle_page_fault)

2
arch/powerpc/kernel/head_fsl_booke.S
View File

@ -422,7 +422,6 @@ skpinv: addi r6,r6,1 /* Increment */
* r12 is pointer to the pte
*/
#ifdef CONFIG_PTE_64BIT
#define PTE_FLAGS_OFFSET 4
#define FIND_PTE \
rlwinm r12, r10, 13, 19, 29; /* Compute pgdir/pmd offset */ \
lwzx r11, r12, r11; /* Get pgd/pmd entry */ \
@ -431,7 +430,6 @@ skpinv: addi r6,r6,1 /* Increment */
rlwimi r12, r10, 23, 20, 28; /* Compute pte address */ \
lwz r11, 4(r12); /* Get pte entry */
#else
#define PTE_FLAGS_OFFSET 0
#define FIND_PTE \
rlwimi r11, r10, 12, 20, 29; /* Create L1 (pgdir/pmd) address */ \
lwz r11, 0(r11); /* Get L1 entry */ \

54
arch/powerpc/kernel/misc_32.S
View File

@ -274,6 +274,10 @@ _GLOBAL(real_writeb)
/*
* Flush MMU TLB
*/
#ifndef CONFIG_FSL_BOOKE
_GLOBAL(_tlbil_all)
_GLOBAL(_tlbil_pid)
#endif
_GLOBAL(_tlbia)
#if defined(CONFIG_40x)
sync /* Flush to memory before changing mapping */
@ -344,6 +348,9 @@ _GLOBAL(_tlbia)
/*
* Flush MMU TLB for a particular address
*/
#ifndef CONFIG_FSL_BOOKE
_GLOBAL(_tlbil_va)
#endif
_GLOBAL(_tlbie)
#if defined(CONFIG_40x)
/* We run the search with interrupts disabled because we have to change
@ -436,6 +443,53 @@ _GLOBAL(_tlbie)
#endif /* ! CONFIG_40x */
blr
#if defined(CONFIG_FSL_BOOKE)
/*
* Flush MMU TLB, but only on the local processor (no broadcast)
*/
_GLOBAL(_tlbil_all)
#define MMUCSR0_TLBFI (MMUCSR0_TLB0FI | MMUCSR0_TLB1FI | \
MMUCSR0_TLB2FI | MMUCSR0_TLB3FI)
li r3,(MMUCSR0_TLBFI)@l
mtspr SPRN_MMUCSR0, r3
1:
mfspr r3,SPRN_MMUCSR0
andi. r3,r3,MMUCSR0_TLBFI@l
bne 1b
blr
/*
* Flush MMU TLB for a particular process id, but only on the local processor
* (no broadcast)
*/
_GLOBAL(_tlbil_pid)
/* we currently do an invalidate all since we don't have per pid invalidate */
li r3,(MMUCSR0_TLBFI)@l
mtspr SPRN_MMUCSR0, r3
1:
mfspr r3,SPRN_MMUCSR0
andi. r3,r3,MMUCSR0_TLBFI@l
bne 1b
blr
/*
* Flush MMU TLB for a particular address, but only on the local processor
* (no broadcast)
*/
_GLOBAL(_tlbil_va)
slwi r4,r4,16
mtspr SPRN_MAS6,r4 /* assume AS=0 for now */
tlbsx 0,r3
mfspr r4,SPRN_MAS1 /* check valid */
andis. r3,r4,MAS1_VALID@h
beqlr
rlwinm r4,r4,0,1,31
mtspr SPRN_MAS1,r4
tlbwe
blr
#endif /* CONFIG_FSL_BOOKE */
/*
* Flush instruction cache.
* This is a no-op on the 601.

3
arch/powerpc/kernel/ppc_ksyms.c
View File

@ -119,6 +119,9 @@ EXPORT_SYMBOL(flush_instruction_cache);
EXPORT_SYMBOL(flush_tlb_kernel_range);
EXPORT_SYMBOL(flush_tlb_page);
EXPORT_SYMBOL(_tlbie);
#if defined(CONFIG_4xx) || defined(CONFIG_8xx) || defined(CONFIG_FSL_BOOKE)
EXPORT_SYMBOL(_tlbil_va);
#endif
#endif
EXPORT_SYMBOL(__flush_icache_range);
EXPORT_SYMBOL(flush_dcache_range);

86
arch/powerpc/mm/hash_low_32.S
View File

@ -75,7 +75,7 @@ _GLOBAL(hash_page_sync)
* Returns to the caller if the access is illegal or there is no
* mapping for the address. Otherwise it places an appropriate PTE
* in the hash table and returns from the exception.
* Uses r0, r3 - r8, ctr, lr.
* Uses r0, r3 - r8, r10, ctr, lr.
*/
.text
_GLOBAL(hash_page)
@ -106,9 +106,15 @@ _GLOBAL(hash_page)
addi r5,r5,swapper_pg_dir@l /* kernel page table */
rlwimi r3,r9,32-12,29,29 /* MSR_PR -> _PAGE_USER */
112: add r5,r5,r7 /* convert to phys addr */
#ifndef CONFIG_PTE_64BIT
rlwimi r5,r4,12,20,29 /* insert top 10 bits of address */
lwz r8,0(r5) /* get pmd entry */
rlwinm. r8,r8,0,0,19 /* extract address of pte page */
#else
rlwinm r8,r4,13,19,29 /* Compute pgdir/pmd offset */
lwzx r8,r8,r5 /* Get L1 entry */
rlwinm. r8,r8,0,0,20 /* extract pt base address */
#endif
#ifdef CONFIG_SMP
beq- hash_page_out /* return if no mapping */
#else
@ -118,7 +124,11 @@ _GLOBAL(hash_page)
to the address following the rfi. */
beqlr-
#endif
#ifndef CONFIG_PTE_64BIT
rlwimi r8,r4,22,20,29 /* insert next 10 bits of address */
#else
rlwimi r8,r4,23,20,28 /* compute pte address */
#endif
rlwinm r0,r3,32-3,24,24 /* _PAGE_RW access -> _PAGE_DIRTY */
ori r0,r0,_PAGE_ACCESSED|_PAGE_HASHPTE
@ -127,9 +137,15 @@ _GLOBAL(hash_page)
* because almost always, there won't be a permission violation
* and there won't already be an HPTE, and thus we will have
* to update the PTE to set _PAGE_HASHPTE. -- paulus.
*
* If PTE_64BIT is set, the low word is the flags word; use that
* word for locking since it contains all the interesting bits.
*/
#if (PTE_FLAGS_OFFSET != 0)
addi r8,r8,PTE_FLAGS_OFFSET
#endif
retry:
lwarx r6,0,r8 /* get linux-style pte */
lwarx r6,0,r8 /* get linux-style pte, flag word */
andc. r5,r3,r6 /* check access & ~permission */
#ifdef CONFIG_SMP
bne- hash_page_out /* return if access not permitted */
@ -137,6 +153,15 @@ retry:
bnelr-
#endif
or r5,r0,r6 /* set accessed/dirty bits */
#ifdef CONFIG_PTE_64BIT
#ifdef CONFIG_SMP
subf r10,r6,r8 /* create false data dependency */
subi r10,r10,PTE_FLAGS_OFFSET
lwzx r10,r6,r10 /* Get upper PTE word */
#else
lwz r10,-PTE_FLAGS_OFFSET(r8)
#endif /* CONFIG_SMP */
#endif /* CONFIG_PTE_64BIT */
stwcx. r5,0,r8 /* attempt to update PTE */
bne- retry /* retry if someone got there first */
@ -203,9 +228,9 @@ _GLOBAL(add_hash_page)
* we can't take a hash table miss (assuming the code is
* covered by a BAT). -- paulus
*/
mfmsr r10
mfmsr r9
SYNC
rlwinm r0,r10,0,17,15 /* clear bit 16 (MSR_EE) */
rlwinm r0,r9,0,17,15 /* clear bit 16 (MSR_EE) */
rlwinm r0,r0,0,28,26 /* clear MSR_DR */
mtmsr r0
SYNC_601
@ -214,14 +239,14 @@ _GLOBAL(add_hash_page)
tophys(r7,0)
#ifdef CONFIG_SMP
addis r9,r7,mmu_hash_lock@ha
addi r9,r9,mmu_hash_lock@l
10: lwarx r0,0,r9 /* take the mmu_hash_lock */
addis r6,r7,mmu_hash_lock@ha
addi r6,r6,mmu_hash_lock@l
10: lwarx r0,0,r6 /* take the mmu_hash_lock */
cmpi 0,r0,0
bne- 11f
stwcx. r8,0,r9
stwcx. r8,0,r6
beq+ 12f
11: lwz r0,0(r9)
11: lwz r0,0(r6)
cmpi 0,r0,0
beq 10b
b 11b
@ -234,10 +259,24 @@ _GLOBAL(add_hash_page)
* HPTE, so we just unlock and return.
*/
mr r8,r5
#ifndef CONFIG_PTE_64BIT
rlwimi r8,r4,22,20,29
#else
rlwimi r8,r4,23,20,28
addi r8,r8,PTE_FLAGS_OFFSET
#endif
1: lwarx r6,0,r8
andi. r0,r6,_PAGE_HASHPTE
bne 9f /* if HASHPTE already set, done */
#ifdef CONFIG_PTE_64BIT
#ifdef CONFIG_SMP
subf r10,r6,r8 /* create false data dependency */
subi r10,r10,PTE_FLAGS_OFFSET
lwzx r10,r6,r10 /* Get upper PTE word */
#else
lwz r10,-PTE_FLAGS_OFFSET(r8)
#endif /* CONFIG_SMP */
#endif /* CONFIG_PTE_64BIT */
ori r5,r6,_PAGE_HASHPTE
stwcx. r5,0,r8
bne- 1b
@ -246,13 +285,15 @@ _GLOBAL(add_hash_page)
9:
#ifdef CONFIG_SMP
addis r6,r7,mmu_hash_lock@ha
addi r6,r6,mmu_hash_lock@l
eieio
li r0,0
stw r0,0(r9) /* clear mmu_hash_lock */
stw r0,0(r6) /* clear mmu_hash_lock */
#endif
/* reenable interrupts and DR */
mtmsr r10
mtmsr r9
SYNC_601
isync
@ -267,7 +308,8 @@ _GLOBAL(add_hash_page)
* r5 contains the linux PTE, r6 contains the old value of the
* linux PTE (before setting _PAGE_HASHPTE) and r7 contains the
* offset to be added to addresses (0 if the MMU is on,
* -KERNELBASE if it is off).
* -KERNELBASE if it is off). r10 contains the upper half of
* the PTE if CONFIG_PTE_64BIT.
* On SMP, the caller should have the mmu_hash_lock held.
* We assume that the caller has (or will) set the _PAGE_HASHPTE
* bit in the linux PTE in memory. The value passed in r6 should
@ -313,6 +355,11 @@ _GLOBAL(create_hpte)
BEGIN_FTR_SECTION
ori r8,r8,_PAGE_COHERENT /* set M (coherence required) */
END_FTR_SECTION_IFSET(CPU_FTR_NEED_COHERENT)
#ifdef CONFIG_PTE_64BIT
/* Put the XPN bits into the PTE */
rlwimi r8,r10,8,20,22
rlwimi r8,r10,2,29,29
#endif
/* Construct the high word of the PPC-style PTE (r5) */
rlwinm r5,r3,7,1,24 /* put VSID in 0x7fffff80 bits */
@ -499,14 +546,18 @@ _GLOBAL(flush_hash_pages)
isync
/* First find a PTE in the range that has _PAGE_HASHPTE set */
#ifndef CONFIG_PTE_64BIT
rlwimi r5,r4,22,20,29
1: lwz r0,0(r5)
#else
rlwimi r5,r4,23,20,28
#endif
1: lwz r0,PTE_FLAGS_OFFSET(r5)
cmpwi cr1,r6,1
andi. r0,r0,_PAGE_HASHPTE
bne 2f
ble cr1,19f
addi r4,r4,0x1000
addi r5,r5,4
addi r5,r5,PTE_SIZE
addi r6,r6,-1
b 1b
@ -545,7 +596,10 @@ _GLOBAL(flush_hash_pages)
* already clear, we're done (for this pte). If not,
* clear it (atomically) and proceed. -- paulus.
*/
33: lwarx r8,0,r5 /* fetch the pte */
#if (PTE_FLAGS_OFFSET != 0)
addi r5,r5,PTE_FLAGS_OFFSET
#endif
33: lwarx r8,0,r5 /* fetch the pte flags word */
andi. r0,r8,_PAGE_HASHPTE
beq 8f /* done if HASHPTE is already clear */
rlwinm r8,r8,0,31,29 /* clear HASHPTE bit */
@ -590,7 +644,7 @@ _GLOBAL(flush_hash_patch_B)
8: ble cr1,9f /* if all ptes checked */
81: addi r6,r6,-1
addi r5,r5,4 /* advance to next pte */
addi r5,r5,PTE_SIZE
addi r4,r4,0x1000
lwz r0,0(r5) /* check next pte */
cmpwi cr1,r6,1

4
arch/powerpc/mm/pgtable_32.c
View File

@ -73,7 +73,7 @@ extern unsigned long p_mapped_by_tlbcam(unsigned long pa);
#endif /* HAVE_TLBCAM */
#ifdef CONFIG_PTE_64BIT
/* 44x uses an 8kB pgdir because it has 8-byte Linux PTEs. */
/* Some processors use an 8kB pgdir because they have 8-byte Linux PTEs. */
#define PGDIR_ORDER 1
#else
#define PGDIR_ORDER 0
@ -288,7 +288,7 @@ int map_page(unsigned long va, phys_addr_t pa, int flags)
}
/*
* Map in all of physical memory starting at KERNELBASE.
* Map in a big chunk of physical memory starting at KERNELBASE.
*/
void __init mapin_ram(void)
{

1
arch/powerpc/mm/tlb_32.c
View File

@ -45,6 +45,7 @@ void flush_hash_entry(struct mm_struct *mm, pte_t *ptep, unsigned long addr)
flush_hash_pages(mm->context.id, addr, ptephys, 1);
}
}
EXPORT_SYMBOL(flush_hash_entry);
/*
* Called by ptep_set_access_flags, must flush on CPUs for which the

17
arch/powerpc/platforms/Kconfig.cputype
View File

@ -50,6 +50,7 @@ config 44x
select PPC_UDBG_16550
select 4xx_SOC
select PPC_PCI_CHOICE
select PHYS_64BIT
config E200
bool "Freescale e200"
@ -128,18 +129,20 @@ config FSL_EMB_PERFMON
config PTE_64BIT
bool
depends on 44x || E500
default y if 44x
default y if E500 && PHYS_64BIT
depends on 44x || E500 || PPC_86xx
default y if PHYS_64BIT
config PHYS_64BIT
bool 'Large physical address support' if E500
depends on 44x || E500
bool 'Large physical address support' if E500 || PPC_86xx
depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
select RESOURCES_64BIT
default y if 44x
---help---
This option enables kernel support for larger than 32-bit physical
addresses. This features is not be available on all e500 cores.
addresses. This feature may not be available on all cores.
If you have more than 3.5GB of RAM or so, you also need to enable
SWIOTLB under Kernel Options for this to work. The actual number
is platform-dependent.
If in doubt, say N here.