*
* This is the "shell" of the ARMv7 processor support.
*/
+#include <linux/init.h>
#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>
#include "proc-macros.S"
-#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)
+#define TTB_NOS (1 << 5)
+#define TTB_IRGN_NC ((0 << 0) | (0 << 6))
+#define TTB_IRGN_WBWA ((0 << 0) | (1 << 6))
+#define TTB_IRGN_WT ((1 << 0) | (0 << 6))
+#define TTB_IRGN_WB ((1 << 0) | (1 << 6))
+
+#ifndef CONFIG_SMP
+/* PTWs cacheable, inner WB not shareable, outer WB not shareable */
+#define TTB_FLAGS TTB_IRGN_WB|TTB_RGN_OC_WB
+#define PMD_FLAGS PMD_SECT_WB
+#else
+/* PTWs cacheable, inner WBWA shareable, outer WBWA not shareable */
+#define TTB_FLAGS TTB_IRGN_WBWA|TTB_S|TTB_NOS|TTB_RGN_OC_WBWA
+#define PMD_FLAGS PMD_SECT_WBWA|PMD_SECT_S
+#endif
ENTRY(cpu_v7_proc_init)
mov pc, lr
+ENDPROC(cpu_v7_proc_init)
ENTRY(cpu_v7_proc_fin)
- mov pc, lr
+ stmfd sp!, {lr}
+ cpsid if @ disable interrupts
+ bl v7_flush_kern_cache_all
+ mrc p15, 0, r0, c1, c0, 0 @ ctrl register
+ bic r0, r0, #0x1000 @ ...i............
+ bic r0, r0, #0x0006 @ .............ca.
+ mcr p15, 0, r0, c1, c0, 0 @ disable caches
+ ldmfd sp!, {pc}
+ENDPROC(cpu_v7_proc_fin)
/*
* cpu_v7_reset(loc)
* to what would be the reset vector.
*
* - loc - location to jump to for soft reset
- *
- * It is assumed that:
*/
.align 5
ENTRY(cpu_v7_reset)
mov pc, r0
+ENDPROC(cpu_v7_reset)
/*
* cpu_v7_do_idle()
* 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
dsb
#endif
mov pc, lr
+ENDPROC(cpu_v7_dcache_clean_area)
/*
* cpu_v7_switch_mm(pgd_phys, tsk)
#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
+#ifdef CONFIG_ARM_ERRATA_430973
+ mcr p15, 0, r2, c7, c5, 6 @ flush BTAC/BTB
+#endif
mcr p15, 0, r2, c13, c0, 1 @ set reserved context ID
isb
1: mcr p15, 0, r0, c2, c0, 0 @ set TTB 0
isb
#endif
mov pc, lr
+ENDPROC(cpu_v7_switch_mm)
/*
* cpu_v7_set_pte_ext(ptep, pte)
* (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
+ ARM( str r1, [r0], #-2048 ) @ linux version
+ THUMB( str r1, [r0] ) @ linux version
+ THUMB( sub r0, r0, #2048 )
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
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"
.align
- .section ".text.init", #alloc, #execinstr
+ __INIT
/*
* __v7_setup
* - cache type register is implemented
*/
__v7_setup:
+#ifdef CONFIG_SMP
+ mrc p15, 0, r0, c1, c0, 1
+ tst r0, #(1 << 6) @ SMP/nAMP mode enabled?
+ orreq r0, r0, #(1 << 6) | (1 << 0) @ Enable SMP/nAMP mode and
+ mcreq p15, 0, r0, c1, c0, 1 @ TLB ops broadcasting
+#endif
adr r12, __v7_setup_stack @ the local stack
stmia r12, {r0-r5, r7, r9, r11, lr}
bl v7_flush_dcache_all
ldmia r12, {r0-r5, r7, r9, r11, lr}
- mov r10, #0
+
+ mrc p15, 0, r0, c0, c0, 0 @ read main ID register
+ and r10, r0, #0xff000000 @ ARM?
+ teq r10, #0x41000000
+ bne 2f
+ and r5, r0, #0x00f00000 @ variant
+ and r6, r0, #0x0000000f @ revision
+ orr r0, r6, r5, lsr #20-4 @ combine variant and revision
+
+#ifdef CONFIG_ARM_ERRATA_430973
+ teq r5, #0x00100000 @ only present in r1p*
+ mrceq p15, 0, r10, c1, c0, 1 @ read aux control register
+ orreq r10, r10, #(1 << 6) @ set IBE to 1
+ mcreq p15, 0, r10, c1, c0, 1 @ write aux control register
+#endif
+#ifdef CONFIG_ARM_ERRATA_458693
+ teq r0, #0x20 @ only present in r2p0
+ mrceq p15, 0, r10, c1, c0, 1 @ read aux control register
+ orreq r10, r10, #(1 << 5) @ set L1NEON to 1
+ orreq r10, r10, #(1 << 9) @ set PLDNOP to 1
+ mcreq p15, 0, r10, c1, c0, 1 @ write aux control register
+#endif
+#ifdef CONFIG_ARM_ERRATA_460075
+ teq r0, #0x20 @ only present in r2p0
+ mrceq p15, 1, r10, c9, c0, 2 @ read L2 cache aux ctrl register
+ tsteq r10, #1 << 22
+ orreq r10, r10, #(1 << 22) @ set the Write Allocate disable bit
+ mcreq p15, 1, r10, c9, c0, 2 @ write the L2 cache aux ctrl register
+#endif
+
+2: mov r10, #0
#ifdef HARVARD_CACHE
mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate
#endif
#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
+ /*
+ * Memory region attributes with SCTLR.TRE=1
+ *
+ * n = TEX[0],C,B
+ * TR = PRRR[2n+1:2n] - memory type
+ * IR = NMRR[2n+1:2n] - inner cacheable property
+ * OR = NMRR[2n+17:2n+16] - outer cacheable property
+ *
+ * n TR IR OR
+ * UNCACHED 000 00
+ * BUFFERABLE 001 10 00 00
+ * WRITETHROUGH 010 10 10 10
+ * WRITEBACK 011 10 11 11
+ * reserved 110
+ * WRITEALLOC 111 10 01 01
+ * DEV_SHARED 100 01
+ * DEV_NONSHARED 100 01
+ * DEV_WC 001 10
+ * DEV_CACHED 011 10
+ *
+ * Other attributes:
+ *
+ * DS0 = PRRR[16] = 0 - device shareable property
+ * DS1 = PRRR[17] = 1 - device shareable property
+ * NS0 = PRRR[18] = 0 - normal shareable property
+ * NS1 = PRRR[19] = 1 - normal shareable property
+ * NOS = PRRR[24+n] = 1 - not outer shareable
+ */
+ ldr r5, =0xff0a81a8 @ PRRR
+ ldr r6, =0x40e040e0 @ NMRR
+ mcr p15, 0, r5, c10, c2, 0 @ write PRRR
+ mcr p15, 0, r6, c10, c2, 1 @ write NMRR
#endif
adr r5, v7_crval
ldmia r5, {r5, r6}
+#ifdef CONFIG_CPU_ENDIAN_BE8
+ orr r6, r6, #1 << 25 @ big-endian page tables
+#endif
mrc p15, 0, r0, c1, c0, 0 @ read control register
bic r0, r0, r5 @ clear bits them
orr r0, r0, r6 @ set them
+ THUMB( orr r0, r0, #1 << 30 ) @ Thumb exceptions
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 S
+ * .EEE ..EE PUI. .T.T 4RVI ZWRS BLDP WCAM
+ * rxxx rrxx xxx0 0101 xxxx xxxx x111 xxxx < forced
+ * 1 0 110 0011 1100 .111 1101 < we want
*/
.type v7_crval, #object
v7_crval:
- crval clear=0x0120c302, mmuset=0x00c0387d, ucset=0x00c0187c
+ crval clear=0x0120c302, mmuset=0x10c03c7d, ucset=0x00c01c7c
__v7_setup_stack:
.space 4 * 11 @ 11 registers
.type v7_processor_functions, #object
ENTRY(v7_processor_functions)
.word v7_early_abort
+ .word v7_pabort
.word cpu_v7_proc_init
.word cpu_v7_proc_fin
.word cpu_v7_reset
.word cpu_v7_dcache_clean_area
.word cpu_v7_switch_mm
.word cpu_v7_set_pte_ext
- .word pabort_ifar
.size v7_processor_functions, . - v7_processor_functions
.type cpu_arch_name, #object
.long 0x000f0000 @ Required ID value
.long 0x000f0000 @ Mask for ID
.long PMD_TYPE_SECT | \
- PMD_SECT_BUFFERABLE | \
- PMD_SECT_CACHEABLE | \
PMD_SECT_AP_WRITE | \
- PMD_SECT_AP_READ
+ PMD_SECT_AP_READ | \
+ PMD_FLAGS
.long PMD_TYPE_SECT | \
PMD_SECT_XN | \
PMD_SECT_AP_WRITE | \
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff