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authorMichael Ellerman <mpe@ellerman.id.au>2015-02-04 12:03:21 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2015-02-04 12:03:21 +1100
commita604c96eb07b2b65734a8aa0e9e8c1bfc435ee4f (patch)
treeb1fad9ec35f0282acddbf71f3885a0b6a85f399b /arch/powerpc/include
parent5c65670c9bfa3be1234d29f36b742897c0360ef3 (diff)
parent0dc294f717d41bfbafc746a7a96a7bc0f114c20c (diff)
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/scottwood/linux into next
Freescale updates from Scott: "Highlights include 8xx optimizations, some more work on datapath device tree content, e300 machine check support, t1040 corenet error reporting, and various cleanups and fixes."
Diffstat (limited to 'arch/powerpc/include')
-rw-r--r--arch/powerpc/include/asm/pci-bridge.h4
-rw-r--r--arch/powerpc/include/asm/pgtable-ppc32.h23
-rw-r--r--arch/powerpc/include/asm/pgtable.h7
-rw-r--r--arch/powerpc/include/asm/pte-8xx.h9
-rw-r--r--arch/powerpc/include/asm/pte-common.h25
5 files changed, 44 insertions, 24 deletions
diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 725247beebec..546d036fe925 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -119,6 +119,10 @@ extern void setup_indirect_pci(struct pci_controller* hose,
extern int indirect_read_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 *val);
+extern int __indirect_read_config(struct pci_controller *hose,
+ unsigned char bus_number, unsigned int devfn,
+ int offset, int len, u32 *val);
+
extern int indirect_write_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 val);
diff --git a/arch/powerpc/include/asm/pgtable-ppc32.h b/arch/powerpc/include/asm/pgtable-ppc32.h
index 234e07c47803..26ce0ab0a9e4 100644
--- a/arch/powerpc/include/asm/pgtable-ppc32.h
+++ b/arch/powerpc/include/asm/pgtable-ppc32.h
@@ -178,12 +178,11 @@ static inline unsigned long pte_update(pte_t *p,
andc %1,%0,%5\n\
or %1,%1,%6\n\
/* 0x200 == Extended encoding, bit 22 */ \
- /* Bit 22 has to be 1 if neither _PAGE_USER nor _PAGE_RW are set */ \
- rlwimi %1,%1,32-2,0x200\n /* get _PAGE_USER */ \
- rlwinm %3,%1,32-1,0x200\n /* get _PAGE_RW */ \
- or %1,%3,%1\n\
- xori %1,%1,0x200\n"
-" stwcx. %1,0,%4\n\
+ /* Bit 22 has to be 1 when _PAGE_USER is unset and _PAGE_RO is set */ \
+ rlwimi %1,%1,32-1,0x200\n /* get _PAGE_RO */ \
+ rlwinm %3,%1,32-2,0x200\n /* get _PAGE_USER */ \
+ andc %1,%1,%3\n\
+ stwcx. %1,0,%4\n\
bne- 1b"
: "=&r" (old), "=&r" (tmp), "=m" (*p), "=&r" (tmp2)
: "r" (p), "r" (clr), "r" (set), "m" (*p)
@@ -275,7 +274,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
{
- pte_update(ptep, (_PAGE_RW | _PAGE_HWWRITE), 0);
+ pte_update(ptep, (_PAGE_RW | _PAGE_HWWRITE), _PAGE_RO);
}
static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
@@ -286,9 +285,11 @@ static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry)
{
- unsigned long bits = pte_val(entry) &
+ unsigned long set = pte_val(entry) &
(_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC);
- pte_update(ptep, 0, bits);
+ unsigned long clr = ~pte_val(entry) & _PAGE_RO;
+
+ pte_update(ptep, clr, set);
}
#define __HAVE_ARCH_PTE_SAME
@@ -346,10 +347,14 @@ static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry)
#define pte_to_pgoff(pte) (pte_val(pte) >> 3)
#define pgoff_to_pte(off) ((pte_t) { ((off) << 3) | _PAGE_FILE })
+#ifndef CONFIG_PPC_4K_PAGES
+void pgtable_cache_init(void);
+#else
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
+#endif
extern int get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep,
pmd_t **pmdp);
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index a8805fee0df9..7e77f2ca5132 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -30,7 +30,8 @@ struct mm_struct;
#include <asm/tlbflush.h>
/* Generic accessors to PTE bits */
-static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; }
+static inline int pte_write(pte_t pte)
+{ return (pte_val(pte) & (_PAGE_RW | _PAGE_RO)) != _PAGE_RO; }
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; }
@@ -115,12 +116,14 @@ static inline unsigned long pte_pfn(pte_t pte) {
/* Generic modifiers for PTE bits */
static inline pte_t pte_wrprotect(pte_t pte) {
- pte_val(pte) &= ~(_PAGE_RW | _PAGE_HWWRITE); return pte; }
+ pte_val(pte) &= ~(_PAGE_RW | _PAGE_HWWRITE);
+ pte_val(pte) |= _PAGE_RO; return pte; }
static inline pte_t pte_mkclean(pte_t pte) {
pte_val(pte) &= ~(_PAGE_DIRTY | _PAGE_HWWRITE); return pte; }
static inline pte_t pte_mkold(pte_t pte) {
pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
static inline pte_t pte_mkwrite(pte_t pte) {
+ pte_val(pte) &= ~_PAGE_RO;
pte_val(pte) |= _PAGE_RW; return pte; }
static inline pte_t pte_mkdirty(pte_t pte) {
pte_val(pte) |= _PAGE_DIRTY; return pte; }
diff --git a/arch/powerpc/include/asm/pte-8xx.h b/arch/powerpc/include/asm/pte-8xx.h
index daa4616e61c4..eb6edb44f140 100644
--- a/arch/powerpc/include/asm/pte-8xx.h
+++ b/arch/powerpc/include/asm/pte-8xx.h
@@ -46,9 +46,9 @@
* require a TLB exception handler change. It is assumed unused bits
* are always zero.
*/
-#define _PAGE_RW 0x0400 /* lsb PP bits, inverted in HW */
+#define _PAGE_RO 0x0400 /* lsb PP bits */
#define _PAGE_USER 0x0800 /* msb PP bits */
-/* set when neither _PAGE_USER nor _PAGE_RW are set */
+/* set when _PAGE_USER is unset and _PAGE_RO is set */
#define _PAGE_KNLRO 0x0200
#define _PMD_PRESENT 0x0001
@@ -62,9 +62,8 @@
#define PTE_ATOMIC_UPDATES 1
/* We need to add _PAGE_SHARED to kernel pages */
-#define _PAGE_KERNEL_RO (_PAGE_SHARED | _PAGE_KNLRO)
-#define _PAGE_KERNEL_ROX (_PAGE_EXEC | _PAGE_KNLRO)
-#define _PAGE_KERNEL_RW (_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE)
+#define _PAGE_KERNEL_RO (_PAGE_SHARED | _PAGE_RO | _PAGE_KNLRO)
+#define _PAGE_KERNEL_ROX (_PAGE_EXEC | _PAGE_RO | _PAGE_KNLRO)
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_PTE_8xx_H */
diff --git a/arch/powerpc/include/asm/pte-common.h b/arch/powerpc/include/asm/pte-common.h
index e040c3595129..2aef9b7a0eb2 100644
--- a/arch/powerpc/include/asm/pte-common.h
+++ b/arch/powerpc/include/asm/pte-common.h
@@ -34,6 +34,12 @@
#ifndef _PAGE_PSIZE
#define _PAGE_PSIZE 0
#endif
+/* _PAGE_RO and _PAGE_RW shall not be defined at the same time */
+#ifndef _PAGE_RO
+#define _PAGE_RO 0
+#else
+#define _PAGE_RW 0
+#endif
#ifndef _PMD_PRESENT_MASK
#define _PMD_PRESENT_MASK _PMD_PRESENT
#endif
@@ -42,10 +48,10 @@
#define PMD_PAGE_SIZE(pmd) bad_call_to_PMD_PAGE_SIZE()
#endif
#ifndef _PAGE_KERNEL_RO
-#define _PAGE_KERNEL_RO 0
+#define _PAGE_KERNEL_RO (_PAGE_RO)
#endif
#ifndef _PAGE_KERNEL_ROX
-#define _PAGE_KERNEL_ROX (_PAGE_EXEC)
+#define _PAGE_KERNEL_ROX (_PAGE_EXEC | _PAGE_RO)
#endif
#ifndef _PAGE_KERNEL_RW
#define _PAGE_KERNEL_RW (_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE)
@@ -95,7 +101,7 @@ extern unsigned long bad_call_to_PMD_PAGE_SIZE(void);
/* Mask of bits returned by pte_pgprot() */
#define PAGE_PROT_BITS (_PAGE_GUARDED | _PAGE_COHERENT | _PAGE_NO_CACHE | \
_PAGE_WRITETHRU | _PAGE_ENDIAN | _PAGE_4K_PFN | \
- _PAGE_USER | _PAGE_ACCESSED | \
+ _PAGE_USER | _PAGE_ACCESSED | _PAGE_RO | \
_PAGE_RW | _PAGE_HWWRITE | _PAGE_DIRTY | _PAGE_EXEC)
#ifdef CONFIG_NUMA_BALANCING
@@ -128,11 +134,14 @@ extern unsigned long bad_call_to_PMD_PAGE_SIZE(void);
*/
#define PAGE_NONE __pgprot(_PAGE_BASE)
#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW)
-#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | _PAGE_EXEC)
-#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER)
-#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC)
-#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER)
-#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC)
+#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | \
+ _PAGE_EXEC)
+#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO)
+#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO | \
+ _PAGE_EXEC)
+#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO)
+#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RO | \
+ _PAGE_EXEC)
#define __P000 PAGE_NONE
#define __P001 PAGE_READONLY