From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Wed, 10 Aug 2005 15:15:32 +0000 (+0100)
Subject: [ARM] Use #defined constants for manipulating v6 hardware PTE bits
X-Git-Tag: firefly_0821_release~42360^2~4
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1b9749e7f15bf2db19f5d201f88401c7517910b7;p=firefly-linux-kernel-4.4.55.git

[ARM] Use #defined constants for manipulating v6 hardware PTE bits

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S
index 352db98ee269..75e65522c8d2 100644
--- a/arch/arm/mm/proc-v6.S
+++ b/arch/arm/mm/proc-v6.S
@@ -111,12 +111,6 @@ ENTRY(cpu_v6_switch_mm)
 	mcr	p15, 0, r1, c13, c0, 1		@ set context ID
 	mov	pc, lr
 
-#define nG	(1 << 11)
-#define APX	(1 << 9)
-#define AP1	(1 << 5)
-#define AP0	(1 << 4)
-#define XN	(1 << 0)
-
 /*
  *	cpu_v6_set_pte(ptep, pte)
  *
@@ -141,22 +135,22 @@ ENTRY(cpu_v6_set_pte)
 
 	bic	r2, r1, #0x00000ff0
 	bic	r2, r2, #0x00000003
-	orr	r2, r2, #AP0 | 2
+	orr	r2, r2, #PTE_EXT_AP0 | 2
 
 	tst	r1, #L_PTE_WRITE
 	tstne	r1, #L_PTE_DIRTY
-	orreq	r2, r2, #APX
+	orreq	r2, r2, #PTE_EXT_APX
 
 	tst	r1, #L_PTE_USER
-	orrne	r2, r2, #AP1 | nG
-	tstne	r2, #APX
-	bicne	r2, r2, #APX | AP0
+	orrne	r2, r2, #PTE_EXT_AP1 | PTE_EXT_NG
+	tstne	r2, #PTE_EXT_APX
+	bicne	r2, r2, #PTE_EXT_APX | PTE_EXT_AP0
 
 	tst	r1, #L_PTE_YOUNG
-	biceq	r2, r2, #APX | AP1 | AP0
+	biceq	r2, r2, #PTE_EXT_APX | PTE_EXT_AP_MASK
 
 @	tst	r1, #L_PTE_EXEC
-@	orreq	r2, r2, #XN
+@	orreq	r2, r2, #PTE_EXT_XN
 
 	tst	r1, #L_PTE_PRESENT
 	moveq	r2, #0
diff --git a/include/asm-arm/pgtable.h b/include/asm-arm/pgtable.h
index a9892eb42a23..8bd4c0faf230 100644
--- a/include/asm-arm/pgtable.h
+++ b/include/asm-arm/pgtable.h
@@ -188,12 +188,18 @@ extern void __pgd_error(const char *file, int line, unsigned long val);
 /*
  *   - extended small page/tiny page
  */
+#define PTE_EXT_XN		(1 << 0)	/* v6 */
 #define PTE_EXT_AP_MASK		(3 << 4)
+#define PTE_EXT_AP0		(1 << 4)
+#define PTE_EXT_AP1		(2 << 4)
 #define PTE_EXT_AP_UNO_SRO	(0 << 4)
-#define PTE_EXT_AP_UNO_SRW	(1 << 4)
-#define PTE_EXT_AP_URO_SRW	(2 << 4)
-#define PTE_EXT_AP_URW_SRW	(3 << 4)
+#define PTE_EXT_AP_UNO_SRW	(PTE_EXT_AP0)
+#define PTE_EXT_AP_URO_SRW	(PTE_EXT_AP1)
+#define PTE_EXT_AP_URW_SRW	(PTE_EXT_AP1|PTE_EXT_AP0)
 #define PTE_EXT_TEX(x)		((x) << 6)	/* v5 */
+#define PTE_EXT_APX		(1 << 9)	/* v6 */
+#define PTE_EXT_SHARED		(1 << 10)	/* v6 */
+#define PTE_EXT_NG		(1 << 11)	/* v6 */
 
 /*
  *   - small page