X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;ds=sidebyside;f=arch%2Farm%2Fmm%2Fproc-v7.S;h=d1ebec42521df417f97e0bb8d88acae060c17d85;hb=d98aac7592114241f378bc8d5b3e424cced7ded2;hp=b49f9a4c82c8e4375f8449bfed5f2527b36598c2;hpb=4a1fd556c1f1fbd6d9d6739efec042324732b697;p=safe%2Fjmp%2Flinux-2.6

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index b49f9a4..d1ebec4 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -12,7 +12,7 @@
 #include <linux/linkage.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
-#include <asm/elf.h>
+#include <asm/hwcap.h>
 #include <asm/pgtable-hwdef.h>
 #include <asm/pgtable.h>
 
@@ -20,14 +20,24 @@
 
 #define TTB_C		(1 << 0)
 #define TTB_S		(1 << 1)
+#define TTB_RGN_NC	(0 << 3)
+#define TTB_RGN_OC_WBWA	(1 << 3)
 #define TTB_RGN_OC_WT	(2 << 3)
 #define TTB_RGN_OC_WB	(3 << 3)
 
+#ifndef CONFIG_SMP
+#define TTB_FLAGS	TTB_C|TTB_RGN_OC_WB		@ mark PTWs cacheable, outer WB
+#else
+#define TTB_FLAGS	TTB_C|TTB_S|TTB_RGN_OC_WBWA	@ mark PTWs cacheable and shared, outer WBWA
+#endif
+
 ENTRY(cpu_v7_proc_init)
 	mov	pc, lr
+ENDPROC(cpu_v7_proc_init)
 
 ENTRY(cpu_v7_proc_fin)
 	mov	pc, lr
+ENDPROC(cpu_v7_proc_fin)
 
 /*
  *	cpu_v7_reset(loc)
@@ -43,6 +53,7 @@ ENTRY(cpu_v7_proc_fin)
 	.align	5
 ENTRY(cpu_v7_reset)
 	mov	pc, r0
+ENDPROC(cpu_v7_reset)
 
 /*
  *	cpu_v7_do_idle()
@@ -52,8 +63,10 @@ ENTRY(cpu_v7_reset)
  *	IRQs are already disabled.
  */
 ENTRY(cpu_v7_do_idle)
-	.long	0xe320f003			@ ARM V7 WFI instruction
+	dsb					@ WFI may enter a low-power mode
+	wfi
 	mov	pc, lr
+ENDPROC(cpu_v7_do_idle)
 
 ENTRY(cpu_v7_dcache_clean_area)
 #ifndef TLB_CAN_READ_FROM_L1_CACHE
@@ -65,6 +78,7 @@ ENTRY(cpu_v7_dcache_clean_area)
 	dsb
 #endif
 	mov	pc, lr
+ENDPROC(cpu_v7_dcache_clean_area)
 
 /*
  *	cpu_v7_switch_mm(pgd_phys, tsk)
@@ -80,7 +94,7 @@ ENTRY(cpu_v7_switch_mm)
 #ifdef CONFIG_MMU
 	mov	r2, #0
 	ldr	r1, [r1, #MM_CONTEXT_ID]	@ get mm->context.id
-	orr	r0, r0, #TTB_RGN_OC_WB		@ mark PTWs outer cacheable, WB
+	orr	r0, r0, #TTB_FLAGS
 	mcr	p15, 0, r2, c13, c0, 1		@ set reserved context ID
 	isb
 1:	mcr	p15, 0, r0, c2, c0, 0		@ set TTB 0
@@ -89,6 +103,7 @@ ENTRY(cpu_v7_switch_mm)
 	isb
 #endif
 	mov	pc, lr
+ENDPROC(cpu_v7_switch_mm)
 
 /*
  *	cpu_v7_set_pte_ext(ptep, pte)
@@ -99,26 +114,19 @@ ENTRY(cpu_v7_switch_mm)
  *		  (hardware version is stored at -1024 bytes)
  *	- pte   - PTE value to store
  *	- ext	- value for extended PTE bits
- *
- *	Permissions:
- *	  YUWD  APX AP1 AP0	SVC	User
- *	  0xxx   0   0   0	no acc	no acc
- *	  100x   1   0   1	r/o	no acc
- *	  10x0   1   0   1	r/o	no acc
- *	  1011   0   0   1	r/w	no acc
- *	  110x   0   1   0	r/w	r/o
- *	  11x0   0   1   0	r/w	r/o
- *	  1111   0   1   1	r/w	r/w
  */
 ENTRY(cpu_v7_set_pte_ext)
 #ifdef CONFIG_MMU
 	str	r1, [r0], #-2048		@ linux version
 
 	bic	r3, r1, #0x000003f0
-	bic	r3, r3, #0x00000003
+	bic	r3, r3, #PTE_TYPE_MASK
 	orr	r3, r3, r2
 	orr	r3, r3, #PTE_EXT_AP0 | 2
 
+	tst	r1, #1 << 4
+	orrne	r3, r3, #PTE_EXT_TEX(1)
+
 	tst	r1, #L_PTE_WRITE
 	tstne	r1, #L_PTE_DIRTY
 	orreq	r3, r3, #PTE_EXT_APX
@@ -128,19 +136,18 @@ ENTRY(cpu_v7_set_pte_ext)
 	tstne	r3, #PTE_EXT_APX
 	bicne	r3, r3, #PTE_EXT_APX | PTE_EXT_AP0
 
-	tst	r1, #L_PTE_YOUNG
-	biceq	r3, r3, #PTE_EXT_APX | PTE_EXT_AP_MASK
-
 	tst	r1, #L_PTE_EXEC
 	orreq	r3, r3, #PTE_EXT_XN
 
-	tst	r1, #L_PTE_PRESENT
+	tst	r1, #L_PTE_YOUNG
+	tstne	r1, #L_PTE_PRESENT
 	moveq	r3, #0
 
 	str	r3, [r0]
 	mcr	p15, 0, r0, c7, c10, 1		@ flush_pte
 #endif
 	mov	pc, lr
+ENDPROC(cpu_v7_set_pte_ext)
 
 cpu_v7_name:
 	.ascii	"ARMv7 Processor"
@@ -164,6 +171,11 @@ cpu_v7_name:
  *	- cache type register is implemented
  */
 __v7_setup:
+#ifdef CONFIG_SMP
+	mrc	p15, 0, r0, c1, c0, 1		@ Enable SMP/nAMP mode
+	orr	r0, r0, #(0x1 << 6)
+	mcr	p15, 0, r0, c1, c0, 1
+#endif
 	adr	r12, __v7_setup_stack		@ the local stack
 	stmia	r12, {r0-r5, r7, r9, r11, lr}
 	bl	v7_flush_dcache_all
@@ -176,28 +188,32 @@ __v7_setup:
 #ifdef CONFIG_MMU
 	mcr	p15, 0, r10, c8, c7, 0		@ invalidate I + D TLBs
 	mcr	p15, 0, r10, c2, c0, 2		@ TTB control register
-	orr	r4, r4, #TTB_RGN_OC_WB		@ mark PTWs outer cacheable, WB
-	mcr	p15, 0, r4, c2, c0, 0		@ load TTB0
+	orr	r4, r4, #TTB_FLAGS
 	mcr	p15, 0, r4, c2, c0, 1		@ load TTB1
 	mov	r10, #0x1f			@ domains 0, 1 = manager
 	mcr	p15, 0, r10, c3, c0, 0		@ load domain access register
 #endif
+	ldr	r5, =0xff0aa1a8
+	ldr	r6, =0x40e040e0
+	mcr	p15, 0, r5, c10, c2, 0		@ write PRRR
+	mcr	p15, 0, r6, c10, c2, 1		@ write NMRR
 	adr	r5, v7_crval
 	ldmia	r5, {r5, r6}
    	mrc	p15, 0, r0, c1, c0, 0		@ read control register
 	bic	r0, r0, r5			@ clear bits them
 	orr	r0, r0, r6			@ set them
 	mov	pc, lr				@ return to head.S:__ret
+ENDPROC(__v7_setup)
 
-	/*
-	 *         V X F   I D LR
-	 * .... ...E PUI. .T.T 4RVI ZFRS BLDP WCAM
-	 * rrrr rrrx xxx0 0101 xxxx xxxx x111 xxxx < forced
-	 *         0 110       0011 1.00 .111 1101 < we want
+	/*   AT
+	 *  TFR   EV X F   I D LR
+	 * .EEE ..EE PUI. .T.T 4RVI ZFRS BLDP WCAM
+	 * rxxx rrxx xxx0 0101 xxxx xxxx x111 xxxx < forced
+	 *    1    0 110       0011 1.00 .111 1101 < we want
 	 */
 	.type	v7_crval, #object
 v7_crval:
-	crval	clear=0x0120c302, mmuset=0x00c0387d, ucset=0x00c0187c
+	crval	clear=0x0120c302, mmuset=0x10c0387d, ucset=0x00c0187c
 
 __v7_setup_stack:
 	.space	4 * 11				@ 11 registers