---

yaml
---
r: 138577
b: refs/heads/master
c: 8d1cf34
h: refs/heads/master
i:
  138575: edade8d
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2a7d55fda58eb4e3652252d4f71222bd1ff90c5e
+refs/heads/master: 8d1cf34e7ad5c7738ce20d20bd7f002f562cb8b5

trunk/arch/powerpc/include/asm/fixmap.h

@@ -61,7 +61,7 @@ extern void __set_fixmap (enum fixed_addresses idx,
  * Some hardware wants to get fixmapped without caching.
  */
 #define set_fixmap_nocache(idx, phys) \
-		__set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
+		__set_fixmap(idx, phys, PAGE_KERNEL_NCG)
 
 #define clear_fixmap(idx) \
 		__set_fixmap(idx, 0, __pgprot(0))

trunk/arch/powerpc/include/asm/pgtable-ppc32.h

@@ -144,6 +144,13 @@ extern int icache_44x_need_flush;
 #define PMD_PAGE_SIZE(pmd)	bad_call_to_PMD_PAGE_SIZE()
 #endif
 
+#ifndef _PAGE_KERNEL_RO
+#define _PAGE_KERNEL_RO	0
+#endif
+#ifndef _PAGE_KERNEL_RW
+#define _PAGE_KERNEL_RW	(_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE)
+#endif
+
 #define _PAGE_HPTEFLAGS _PAGE_HASHPTE
 
 /* Location of the PFN in the PTE. Most platforms use the same as _PAGE_SHIFT
@@ -186,30 +193,25 @@ extern int icache_44x_need_flush;
 #else
 #define _PAGE_BASE	(_PAGE_PRESENT | _PAGE_ACCESSED)
 #endif
-#define _PAGE_BASE_NC	(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_NO_CACHE)
-
-#define _PAGE_WRENABLE	(_PAGE_RW | _PAGE_DIRTY | _PAGE_HWWRITE)
-#define _PAGE_KERNEL	(_PAGE_BASE | _PAGE_SHARED | _PAGE_WRENABLE)
-#define _PAGE_KERNEL_NC	(_PAGE_BASE_NC | _PAGE_SHARED | _PAGE_WRENABLE)
-
-#ifdef CONFIG_PPC_STD_MMU
-/* On standard PPC MMU, no user access implies kernel read/write access,
- * so to write-protect kernel memory we must turn on user access */
-#define _PAGE_KERNEL_RO	(_PAGE_BASE | _PAGE_SHARED | _PAGE_USER)
-#else
-#define _PAGE_KERNEL_RO	(_PAGE_BASE | _PAGE_SHARED)
-#endif
-
-#define _PAGE_IO	(_PAGE_KERNEL_NC | _PAGE_GUARDED)
-#define _PAGE_RAM	(_PAGE_KERNEL | _PAGE_HWEXEC)
+#define _PAGE_BASE_NC	(_PAGE_PRESENT | _PAGE_ACCESSED)
+
+/* Permission masks used for kernel mappings */
+#define PAGE_KERNEL	__pgprot(_PAGE_BASE | _PAGE_KERNEL_RW)
+#define PAGE_KERNEL_NC	__pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \
+				 _PAGE_NO_CACHE)
+#define PAGE_KERNEL_NCG	__pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \
+				 _PAGE_NO_CACHE | _PAGE_GUARDED)
+#define PAGE_KERNEL_X __pgprot(_PAGE_BASE | _PAGE_KERNEL_RW | _PAGE_EXEC)
+#define PAGE_KERNEL_RO __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO)
+#define PAGE_KERNEL_ROX __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO | _PAGE_EXEC)
 
 #if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) ||\
 	defined(CONFIG_KPROBES)
 /* We want the debuggers to be able to set breakpoints anywhere, so
  * don't write protect the kernel text */
-#define _PAGE_RAM_TEXT	_PAGE_RAM
+#define PAGE_KERNEL_TEXT	PAGE_KERNEL_X
 #else
-#define _PAGE_RAM_TEXT	(_PAGE_KERNEL_RO | _PAGE_HWEXEC)
+#define PAGE_KERNEL_TEXT	PAGE_KERNEL_ROX
 #endif
 
 #define PAGE_NONE	__pgprot(_PAGE_BASE)
@@ -220,9 +222,6 @@ extern int icache_44x_need_flush;
 #define PAGE_COPY	__pgprot(_PAGE_BASE | _PAGE_USER)
 #define PAGE_COPY_X	__pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC)
 
-#define PAGE_KERNEL		__pgprot(_PAGE_RAM)
-#define PAGE_KERNEL_NOCACHE	__pgprot(_PAGE_IO)
-
 /*
  * The PowerPC can only do execute protection on a segment (256MB) basis,
  * not on a page basis.  So we consider execute permission the same as read.

trunk/arch/powerpc/include/asm/pgtable-ppc64.h

@@ -81,11 +81,6 @@
  */
 #include <asm/pte-hash64.h>
 
-/* To make some generic powerpc code happy */
-#ifndef _PAGE_HWEXEC
-#define _PAGE_HWEXEC		0
-#endif
-
 /* Some other useful definitions */
 #define PTE_RPN_MAX	(1UL << (64 - PTE_RPN_SHIFT))
 #define PTE_RPN_MASK	(~((1UL<<PTE_RPN_SHIFT)-1))
@@ -96,28 +91,44 @@
 #define _PAGE_CHG_MASK	(PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \
                          _PAGE_ACCESSED | _PAGE_SPECIAL)
 
+#define _PAGE_BASE_NC	(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_PSIZE)
+#define _PAGE_BASE	(_PAGE_BASE_NC | _PAGE_COHERENT)
 
 
-/* __pgprot defined in arch/powerpc/include/asm/page.h */
-#define PAGE_NONE	__pgprot(_PAGE_PRESENT | _PAGE_ACCESSED)
-
-#define PAGE_SHARED	__pgprot(_PAGE_BASE | _PAGE_RW | _PAGE_USER)
-#define PAGE_SHARED_X	__pgprot(_PAGE_BASE | _PAGE_RW | _PAGE_USER | _PAGE_EXEC)
+/* Permission masks used to generate the __P and __S table,
+ *
+ * Note:__pgprot is defined in arch/powerpc/include/asm/page.h
+ */
+#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_KERNEL	__pgprot(_PAGE_BASE | _PAGE_WRENABLE)
-#define PAGE_KERNEL_CI	__pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
-			       _PAGE_WRENABLE | _PAGE_NO_CACHE | _PAGE_GUARDED)
-#define PAGE_KERNEL_EXEC __pgprot(_PAGE_BASE | _PAGE_WRENABLE | _PAGE_EXEC)
 
-#define PAGE_AGP	__pgprot(_PAGE_BASE | _PAGE_WRENABLE | _PAGE_NO_CACHE)
-#define HAVE_PAGE_AGP
+/* Permission masks used for kernel mappings */
+#define PAGE_KERNEL	__pgprot(_PAGE_BASE | _PAGE_KERNEL_RW)
+#define PAGE_KERNEL_NC	__pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \
+				 _PAGE_NO_CACHE)
+#define PAGE_KERNEL_NCG	__pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \
+				 _PAGE_NO_CACHE | _PAGE_GUARDED)
+#define PAGE_KERNEL_X __pgprot(_PAGE_BASE | _PAGE_KERNEL_RW | _PAGE_EXEC)
+#define PAGE_KERNEL_RO __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO)
+#define PAGE_KERNEL_ROX __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO | _PAGE_EXEC)
+
+/* Protection bits for use by pte_pgprot() */
+#define PAGE_PROT_BITS	(_PAGE_GUARDED | _PAGE_COHERENT | \
+			 _PAGE_NO_CACHE | _PAGE_WRITETHRU |		\
+			 _PAGE_4K_PFN | _PAGE_USER | _PAGE_RW |		\
+			 _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_EXEC)
+
 
 /* We always have _PAGE_SPECIAL on 64 bit */
 #define __HAVE_ARCH_PTE_SPECIAL
 
+/* Make modules code happy. We don't set RO yet */
+#define PAGE_KERNEL_EXEC	PAGE_KERNEL_X
 
 /*
  * POWER4 and newer have per page execute protection, older chips can only
@@ -395,7 +406,8 @@ static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
 static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry)
 {
 	unsigned long bits = pte_val(entry) &
-		(_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC);
+		(_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW |
+		 _PAGE_EXEC | _PAGE_HWEXEC);
 	unsigned long old, tmp;
 
 	__asm__ __volatile__(

trunk/arch/powerpc/include/asm/pgtable.h

@@ -25,6 +25,10 @@ static inline void assert_pte_locked(struct mm_struct *mm, unsigned long addr)
 #  include <asm/pgtable-ppc32.h>
 #endif
 
+/* Special mapping for AGP */
+#define PAGE_AGP	(PAGE_KERNEL_NC)
+#define HAVE_PAGE_AGP
+
 #ifndef __ASSEMBLY__
 
 /* Insert a PTE, top-level function is out of line. It uses an inline

trunk/arch/powerpc/include/asm/pte-8xx.h

@@ -59,6 +59,9 @@
 /* Until my rework is finished, 8xx still needs atomic PTE updates */
 #define PTE_ATOMIC_UPDATES	1
 
+/* We need to add _PAGE_SHARED to kernel pages */
+#define _PAGE_KERNEL_RO	(_PAGE_SHARED)
+#define _PAGE_KERNEL_RW	(_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE)
 
 #endif /* __KERNEL__ */
 #endif /*  _ASM_POWERPC_PTE_8xx_H */

trunk/arch/powerpc/include/asm/pte-hash32.h

@@ -44,6 +44,5 @@
 /* Hash table based platforms need atomic updates of the linux PTE */
 #define PTE_ATOMIC_UPDATES	1
 
-
 #endif /* __KERNEL__ */
 #endif /*  _ASM_POWERPC_PTE_HASH32_H */

trunk/arch/powerpc/include/asm/pte-hash64-4k.h

@@ -8,9 +8,6 @@
 #define _PAGE_F_GIX     _PAGE_GROUP_IX
 #define _PAGE_SPECIAL	0x10000 /* software: special page */
 
-/* There is no 4K PFN hack on 4K pages */
-#define _PAGE_4K_PFN	0
-
 /* PTE flags to conserve for HPTE identification */
 #define _PAGE_HPTEFLAGS (_PAGE_BUSY | _PAGE_HASHPTE | \
 			 _PAGE_SECONDARY | _PAGE_GROUP_IX)

trunk/arch/powerpc/include/asm/pte-hash64.h

@@ -6,36 +6,41 @@
  * Common bits between 4K and 64K pages in a linux-style PTE.
  * These match the bits in the (hardware-defined) PowerPC PTE as closely
  * as possible. Additional bits may be defined in pgtable-hash64-*.h
+ *
+ * Note: We only support user read/write permissions. Supervisor always
+ * have full read/write to pages above PAGE_OFFSET (pages below that
+ * always use the user access permissions).
+ *
+ * We could create separate kernel read-only if we used the 3 PP bits
+ * combinations that newer processors provide but we currently don't.
  */
-#define _PAGE_PRESENT	0x0001 /* software: pte contains a translation */
-#define _PAGE_USER	0x0002 /* matches one of the PP bits */
-#define _PAGE_FILE	0x0002 /* (!present only) software: pte holds file offset */
-#define _PAGE_EXEC	0x0004 /* No execute on POWER4 and newer (we invert) */
-#define _PAGE_GUARDED	0x0008
-#define _PAGE_COHERENT	0x0010 /* M: enforce memory coherence (SMP systems) */
-#define _PAGE_NO_CACHE	0x0020 /* I: cache inhibit */
-#define _PAGE_WRITETHRU	0x0040 /* W: cache write-through */
-#define _PAGE_DIRTY	0x0080 /* C: page changed */
-#define _PAGE_ACCESSED	0x0100 /* R: page referenced */
-#define _PAGE_RW	0x0200 /* software: user write access allowed */
-#define _PAGE_BUSY	0x0800 /* software: PTE & hash are busy */
+#define _PAGE_PRESENT		0x0001 /* software: pte contains a translation */
+#define _PAGE_USER		0x0002 /* matches one of the PP bits */
+#define _PAGE_FILE		0x0002 /* (!present only) software: pte holds file offset */
+#define _PAGE_EXEC		0x0004 /* No execute on POWER4 and newer (we invert) */
+#define _PAGE_GUARDED		0x0008
+#define _PAGE_COHERENT		0x0010 /* M: enforce memory coherence (SMP systems) */
+#define _PAGE_NO_CACHE		0x0020 /* I: cache inhibit */
+#define _PAGE_WRITETHRU		0x0040 /* W: cache write-through */
+#define _PAGE_DIRTY		0x0080 /* C: page changed */
+#define _PAGE_ACCESSED		0x0100 /* R: page referenced */
+#define _PAGE_RW		0x0200 /* software: user write access allowed */
+#define _PAGE_BUSY		0x0800 /* software: PTE & hash are busy */
+
+/* No separate kernel read-only */
+#define _PAGE_KERNEL_RW		(_PAGE_RW | _PAGE_DIRTY) /* user access blocked by key */
+#define _PAGE_KERNEL_RO		 _PAGE_KERNEL_RW
 
 /* Strong Access Ordering */
-#define _PAGE_SAO	(_PAGE_WRITETHRU | _PAGE_NO_CACHE | _PAGE_COHERENT)
+#define _PAGE_SAO		(_PAGE_WRITETHRU | _PAGE_NO_CACHE | _PAGE_COHERENT)
 
-#define _PAGE_BASE	(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_COHERENT)
-
-#define _PAGE_WRENABLE	(_PAGE_RW | _PAGE_DIRTY)
+/* No page size encoding in the linux PTE */
+#define _PAGE_PSIZE		0
 
 /* PTEIDX nibble */
 #define _PTEIDX_SECONDARY	0x8
 #define _PTEIDX_GROUP_IX	0x7
 
-#define PAGE_PROT_BITS	(_PAGE_GUARDED | _PAGE_COHERENT | \
-			 _PAGE_NO_CACHE | _PAGE_WRITETHRU |		\
-			 _PAGE_4K_PFN | _PAGE_RW | _PAGE_USER |		\
-			 _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_EXEC)
-
 
 #ifdef CONFIG_PPC_64K_PAGES
 #include <asm/pte-hash64-64k.h>

trunk/arch/powerpc/mm/fsl_booke_mmu.c

@@ -162,7 +162,7 @@ unsigned long __init mmu_mapin_ram(void)
 	phys_addr_t phys = memstart_addr;
 
 	while (cam[tlbcam_index] && tlbcam_index < ARRAY_SIZE(cam)) {
-		settlbcam(tlbcam_index, virt, phys, cam[tlbcam_index], _PAGE_KERNEL, 0);
+		settlbcam(tlbcam_index, virt, phys, cam[tlbcam_index], PAGE_KERNEL_X, 0);
 		virt += cam[tlbcam_index];
 		phys += cam[tlbcam_index];
 		tlbcam_index++;

trunk/arch/powerpc/mm/pgtable_32.c

@@ -164,7 +164,7 @@ __ioremap_caller(phys_addr_t addr, unsigned long size, unsigned long flags,
 
 	/* Make sure we have the base flags */
 	if ((flags & _PAGE_PRESENT) == 0)
-		flags |= _PAGE_KERNEL;
+		flags |= PAGE_KERNEL;
 
 	/* Non-cacheable page cannot be coherent */
 	if (flags & _PAGE_NO_CACHE)
@@ -296,7 +296,7 @@ void __init mapin_ram(void)
 	p = memstart_addr + s;
 	for (; s < total_lowmem; s += PAGE_SIZE) {
 		ktext = ((char *) v >= _stext && (char *) v < etext);
-		f = ktext ?_PAGE_RAM_TEXT : _PAGE_RAM;
+		f = ktext ? PAGE_KERNEL_TEXT : PAGE_KERNEL;
 		map_page(v, p, f);
 #ifdef CONFIG_PPC_STD_MMU_32
 		if (ktext)

trunk/arch/powerpc/mm/ppc_mmu_32.c

@@ -74,9 +74,6 @@ unsigned long p_mapped_by_bats(phys_addr_t pa)
 
 unsigned long __init mmu_mapin_ram(void)
 {
-#ifdef CONFIG_POWER4
-	return 0;
-#else
 	unsigned long tot, bl, done;
 	unsigned long max_size = (256<<20);
 
@@ -95,20 +92,19 @@ unsigned long __init mmu_mapin_ram(void)
 			break;
 	}
 
-	setbat(2, PAGE_OFFSET, 0, bl, _PAGE_RAM);
+	setbat(2, PAGE_OFFSET, 0, bl, PAGE_KERNEL_X);
 	done = (unsigned long)bat_addrs[2].limit - PAGE_OFFSET + 1;
 	if ((done < tot) && !bat_addrs[3].limit) {
 		/* use BAT3 to cover a bit more */
 		tot -= done;
 		for (bl = 128<<10; bl < max_size; bl <<= 1)
 			if (bl * 2 > tot)
 				break;
-		setbat(3, PAGE_OFFSET+done, done, bl, _PAGE_RAM);
+		setbat(3, PAGE_OFFSET+done, done, bl, PAGE_KERNEL_X);
 		done = (unsigned long)bat_addrs[3].limit - PAGE_OFFSET + 1;
 	}
 
 	return done;
-#endif
 }
 
 /*
@@ -136,9 +132,7 @@ void __init setbat(int index, unsigned long virt, phys_addr_t phys,
 		wimgxpp |= (flags & _PAGE_RW)? BPP_RW: BPP_RX;
 		bat[1].batu = virt | (bl << 2) | 2; /* Vs=1, Vp=0 */
 		bat[1].batl = BAT_PHYS_ADDR(phys) | wimgxpp;
-#ifndef CONFIG_KGDB /* want user access for breakpoints */
 		if (flags & _PAGE_USER)
-#endif
 			bat[1].batu |= 1; 	/* Vp = 1 */
 		if (flags & _PAGE_GUARDED) {
 			/* G bit must be zero in IBATs */

trunk/arch/powerpc/sysdev/cpm_common.c

@@ -56,7 +56,7 @@ void __init udbg_init_cpm(void)
 {
 	if (cpm_udbg_txdesc) {
 #ifdef CONFIG_CPM2
-		setbat(1, 0xf0000000, 0xf0000000, 1024*1024, _PAGE_IO);
+		setbat(1, 0xf0000000, 0xf0000000, 1024*1024, PAGE_KERNEL_NCG);
 #endif
 		udbg_putc = udbg_putc_cpm;
 	}