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-rw-r--r--arch/arm/kernel/Makefile3
-rw-r--r--arch/arm/kernel/armksyms.c2
-rw-r--r--arch/arm/kernel/arthur.c2
-rw-r--r--arch/arm/kernel/asm-offsets.c18
-rw-r--r--arch/arm/kernel/atags.c83
-rw-r--r--arch/arm/kernel/calls.S6
-rw-r--r--arch/arm/kernel/ecard.c69
-rw-r--r--arch/arm/kernel/ecard.h13
-rw-r--r--arch/arm/kernel/entry-armv.S111
-rw-r--r--arch/arm/kernel/entry-common.S5
-rw-r--r--arch/arm/kernel/head-common.S7
-rw-r--r--arch/arm/kernel/init_task.c1
-rw-r--r--arch/arm/kernel/kprobes-decode.c2
-rw-r--r--arch/arm/kernel/kprobes.c2
-rw-r--r--arch/arm/kernel/process.c4
-rw-r--r--arch/arm/kernel/semaphore.c221
-rw-r--r--arch/arm/kernel/stacktrace.c34
-rw-r--r--arch/arm/kernel/sys_arm.c17
-rw-r--r--arch/arm/kernel/sys_oabi-compat.c24
-rw-r--r--arch/arm/kernel/thumbee.c81
-rw-r--r--arch/arm/kernel/time.c120
21 files changed, 329 insertions, 496 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 00d44c6fbfe..ad455ff5aeb 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -7,7 +7,7 @@ AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
# Object file lists.
obj-y := compat.o entry-armv.o entry-common.o irq.o \
- process.o ptrace.o semaphore.o setup.o signal.o \
+ process.o ptrace.o setup.o signal.o \
sys_arm.o stacktrace.o time.o traps.o
obj-$(CONFIG_ISA_DMA_API) += dma.o
@@ -22,6 +22,7 @@ obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
obj-$(CONFIG_KPROBES) += kprobes.o kprobes-decode.o
obj-$(CONFIG_ATAGS_PROC) += atags.o
obj-$(CONFIG_OABI_COMPAT) += sys_oabi-compat.o
+obj-$(CONFIG_ARM_THUMBEE) += thumbee.o
obj-$(CONFIG_CRUNCH) += crunch.o crunch-bits.o
AFLAGS_crunch-bits.o := -Wa,-mcpu=ep9312
diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c
index f73d62e8ab6..688b7b1ee41 100644
--- a/arch/arm/kernel/armksyms.c
+++ b/arch/arm/kernel/armksyms.c
@@ -179,3 +179,5 @@ EXPORT_SYMBOL(_find_next_zero_bit_be);
EXPORT_SYMBOL(_find_first_bit_be);
EXPORT_SYMBOL(_find_next_bit_be);
#endif
+
+EXPORT_SYMBOL(copy_page);
diff --git a/arch/arm/kernel/arthur.c b/arch/arm/kernel/arthur.c
index 0ee2e981963..321c5291d05 100644
--- a/arch/arm/kernel/arthur.c
+++ b/arch/arm/kernel/arthur.c
@@ -90,3 +90,5 @@ static void __exit arthur_exit(void)
module_init(arthur_init);
module_exit(arthur_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index 3278e713c32..4a881258bb1 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -16,6 +16,7 @@
#include <asm/thread_info.h>
#include <asm/memory.h>
#include <asm/procinfo.h>
+#include <linux/kbuild.h>
/*
* Make sure that the compiler and target are compatible.
@@ -35,13 +36,6 @@
#error Known good compilers: 3.3
#endif
-/* Use marker if you need to separate the values later */
-
-#define DEFINE(sym, val) \
- asm volatile("\n->" #sym " %0 " #val : : "i" (val))
-
-#define BLANK() asm volatile("\n->" : : )
-
int main(void)
{
DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
@@ -58,6 +52,9 @@ int main(void)
DEFINE(TI_TP_VALUE, offsetof(struct thread_info, tp_value));
DEFINE(TI_FPSTATE, offsetof(struct thread_info, fpstate));
DEFINE(TI_VFPSTATE, offsetof(struct thread_info, vfpstate));
+#ifdef CONFIG_ARM_THUMBEE
+ DEFINE(TI_THUMBEE_STATE, offsetof(struct thread_info, thumbee_state));
+#endif
#ifdef CONFIG_IWMMXT
DEFINE(TI_IWMMXT_STATE, offsetof(struct thread_info, fpstate.iwmmxt));
#endif
@@ -108,5 +105,12 @@ int main(void)
DEFINE(PROCINFO_INITFUNC, offsetof(struct proc_info_list, __cpu_flush));
DEFINE(PROCINFO_MM_MMUFLAGS, offsetof(struct proc_info_list, __cpu_mm_mmu_flags));
DEFINE(PROCINFO_IO_MMUFLAGS, offsetof(struct proc_info_list, __cpu_io_mmu_flags));
+ BLANK();
+#ifdef MULTI_DABORT
+ DEFINE(PROCESSOR_DABT_FUNC, offsetof(struct processor, _data_abort));
+#endif
+#ifdef MULTI_PABORT
+ DEFINE(PROCESSOR_PABT_FUNC, offsetof(struct processor, _prefetch_abort));
+#endif
return 0;
}
diff --git a/arch/arm/kernel/atags.c b/arch/arm/kernel/atags.c
index e2e934c3808..42a1a1415fa 100644
--- a/arch/arm/kernel/atags.c
+++ b/arch/arm/kernel/atags.c
@@ -1,5 +1,4 @@
#include <linux/slab.h>
-#include <linux/kexec.h>
#include <linux/proc_fs.h>
#include <asm/setup.h>
#include <asm/types.h>
@@ -7,9 +6,8 @@
struct buffer {
size_t size;
- char *data;
+ char data[];
};
-static struct buffer tags_buffer;
static int
read_buffer(char* page, char** start, off_t off, int count,
@@ -29,58 +27,57 @@ read_buffer(char* page, char** start, off_t off, int count,
return count;
}
-
-static int
-create_proc_entries(void)
-{
- struct proc_dir_entry* tags_entry;
-
- tags_entry = create_proc_read_entry("atags", 0400, &proc_root, read_buffer, &tags_buffer);
- if (!tags_entry)
- return -ENOMEM;
-
- return 0;
-}
-
-
-static char __initdata atags_copy_buf[KEXEC_BOOT_PARAMS_SIZE];
-static char __initdata *atags_copy;
+#define BOOT_PARAMS_SIZE 1536
+static char __initdata atags_copy[BOOT_PARAMS_SIZE];
void __init save_atags(const struct tag *tags)
{
- atags_copy = atags_copy_buf;
- memcpy(atags_copy, tags, KEXEC_BOOT_PARAMS_SIZE);
+ memcpy(atags_copy, tags, sizeof(atags_copy));
}
-
static int __init init_atags_procfs(void)
{
- struct tag *tag;
- int error;
+ /*
+ * This cannot go into save_atags() because kmalloc and proc don't work
+ * yet when it is called.
+ */
+ struct proc_dir_entry *tags_entry;
+ struct tag *tag = (struct tag *)atags_copy;
+ struct buffer *b;
+ size_t size;
- if (!atags_copy) {
- printk(KERN_WARNING "Exporting ATAGs: No saved tags found\n");
- return -EIO;
+ if (tag->hdr.tag != ATAG_CORE) {
+ printk(KERN_INFO "No ATAGs?");
+ return -EINVAL;
}
- for (tag = (struct tag *) atags_copy; tag->hdr.size; tag = tag_next(tag))
+ for (; tag->hdr.size; tag = tag_next(tag))
;
- tags_buffer.size = ((char *) tag - atags_copy) + sizeof(tag->hdr);
- tags_buffer.data = kmalloc(tags_buffer.size, GFP_KERNEL);
- if (tags_buffer.data == NULL)
- return -ENOMEM;
- memcpy(tags_buffer.data, atags_copy, tags_buffer.size);
-
- error = create_proc_entries();
- if (error) {
- printk(KERN_ERR "Exporting ATAGs: not enough memory\n");
- kfree(tags_buffer.data);
- tags_buffer.size = 0;
- tags_buffer.data = NULL;
- }
+ /* include the terminating ATAG_NONE */
+ size = (char *)tag - atags_copy + sizeof(struct tag_header);
- return error;
-}
+ WARN_ON(tag->hdr.tag != ATAG_NONE);
+
+ b = kmalloc(sizeof(*b) + size, GFP_KERNEL);
+ if (!b)
+ goto nomem;
+ b->size = size;
+ memcpy(b->data, atags_copy, size);
+
+ tags_entry = create_proc_read_entry("atags", 0400,
+ NULL, read_buffer, b);
+
+ if (!tags_entry)
+ goto nomem;
+
+ return 0;
+
+nomem:
+ kfree(b);
+ printk(KERN_ERR "Exporting ATAGs: not enough memory\n");
+
+ return -ENOMEM;
+}
arch_initcall(init_atags_procfs);
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index 283e14fff99..30a67a5a40a 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -336,7 +336,7 @@
CALL(sys_mknodat)
/* 325 */ CALL(sys_fchownat)
CALL(sys_futimesat)
- CALL(sys_fstatat64)
+ CALL(ABI(sys_fstatat64, sys_oabi_fstatat64))
CALL(sys_unlinkat)
CALL(sys_renameat)
/* 330 */ CALL(sys_linkat)
@@ -359,9 +359,11 @@
CALL(sys_kexec_load)
CALL(sys_utimensat)
CALL(sys_signalfd)
-/* 350 */ CALL(sys_ni_syscall)
+/* 350 */ CALL(sys_timerfd_create)
CALL(sys_eventfd)
CALL(sys_fallocate)
+ CALL(sys_timerfd_settime)
+ CALL(sys_timerfd_gettime)
#ifndef syscalls_counted
.equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
#define syscalls_counted
diff --git a/arch/arm/kernel/ecard.c b/arch/arm/kernel/ecard.c
index f56d48c451e..8bfd299bfe7 100644
--- a/arch/arm/kernel/ecard.c
+++ b/arch/arm/kernel/ecard.c
@@ -37,6 +37,7 @@
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/mutex.h>
@@ -679,7 +680,7 @@ static int __init ecard_probeirqhw(void)
#define IO_EC_MEMC8_BASE 0
#endif
-unsigned int __ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed)
+static unsigned int __ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed)
{
unsigned long address = 0;
int slot = ec->slot_no;
@@ -723,17 +724,14 @@ unsigned int __ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed)
return address;
}
-static int ecard_prints(char *buffer, ecard_t *ec)
+static int ecard_prints(struct seq_file *m, ecard_t *ec)
{
- char *start = buffer;
-
- buffer += sprintf(buffer, " %d: %s ", ec->slot_no,
- ec->easi ? "EASI" : " ");
+ seq_printf(m, " %d: %s ", ec->slot_no, ec->easi ? "EASI" : " ");
if (ec->cid.id == 0) {
struct in_chunk_dir incd;
- buffer += sprintf(buffer, "[%04X:%04X] ",
+ seq_printf(m, "[%04X:%04X] ",
ec->cid.manufacturer, ec->cid.product);
if (!ec->card_desc && ec->cid.cd &&
@@ -744,43 +742,43 @@ static int ecard_prints(char *buffer, ecard_t *ec)
strcpy((char *)ec->card_desc, incd.d.string);
}
- buffer += sprintf(buffer, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*");
+ seq_printf(m, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*");
} else
- buffer += sprintf(buffer, "Simple card %d\n", ec->cid.id);
+ seq_printf(m, "Simple card %d\n", ec->cid.id);
- return buffer - start;
+ return 0;
}
-static int get_ecard_dev_info(char *buf, char **start, off_t pos, int count)
+static int ecard_devices_proc_show(struct seq_file *m, void *v)
{
ecard_t *ec = cards;
- off_t at = 0;
- int len, cnt;
-
- cnt = 0;
- while (ec && count > cnt) {
- len = ecard_prints(buf, ec);
- at += len;
- if (at >= pos) {
- if (!*start) {
- *start = buf + (pos - (at - len));
- cnt = at - pos;
- } else
- cnt += len;
- buf += len;
- }
+
+ while (ec) {
+ ecard_prints(m, ec);
ec = ec->next;
}
- return (count > cnt) ? cnt : count;
+ return 0;
}
+static int ecard_devices_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, ecard_devices_proc_show, NULL);
+}
+
+static const struct file_operations bus_ecard_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = ecard_devices_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
static struct proc_dir_entry *proc_bus_ecard_dir = NULL;
static void ecard_proc_init(void)
{
- proc_bus_ecard_dir = proc_mkdir("ecard", proc_bus);
- create_proc_info_entry("devices", 0, proc_bus_ecard_dir,
- get_ecard_dev_info);
+ proc_bus_ecard_dir = proc_mkdir("bus/ecard", NULL);
+ proc_create("devices", 0, proc_bus_ecard_dir, &bus_ecard_proc_fops);
}
#define ec_set_resource(ec,nr,st,sz) \
@@ -1004,7 +1002,7 @@ ecard_probe(int slot, card_type_t type)
}
rc = -ENODEV;
- if ((ec->podaddr = ecard_address(ec, type, ECARD_SYNC)) == 0)
+ if ((ec->podaddr = __ecard_address(ec, type, ECARD_SYNC)) == 0)
goto nodev;
cid.r_zero = 1;
@@ -1143,10 +1141,10 @@ static int ecard_drv_probe(struct device *dev)
id = ecard_match_device(drv->id_table, ec);
- ecard_claim(ec);
+ ec->claimed = 1;
ret = drv->probe(ec, id);
if (ret)
- ecard_release(ec);
+ ec->claimed = 0;
return ret;
}
@@ -1156,7 +1154,7 @@ static int ecard_drv_remove(struct device *dev)
struct ecard_driver *drv = ECARD_DRV(dev->driver);
drv->remove(ec);
- ecard_release(ec);
+ ec->claimed = 0;
/*
* Restore the default operations. We ensure that the
@@ -1184,7 +1182,7 @@ static void ecard_drv_shutdown(struct device *dev)
if (dev->driver) {
if (drv->shutdown)
drv->shutdown(ec);
- ecard_release(ec);
+ ec->claimed = 0;
}
/*
@@ -1241,7 +1239,6 @@ static int ecard_bus_init(void)
postcore_initcall(ecard_bus_init);
EXPORT_SYMBOL(ecard_readchunk);
-EXPORT_SYMBOL(__ecard_address);
EXPORT_SYMBOL(ecard_register_driver);
EXPORT_SYMBOL(ecard_remove_driver);
EXPORT_SYMBOL(ecard_bus_type);
diff --git a/arch/arm/kernel/ecard.h b/arch/arm/kernel/ecard.h
index d7c2dacf935..4642d436be2 100644
--- a/arch/arm/kernel/ecard.h
+++ b/arch/arm/kernel/ecard.h
@@ -54,3 +54,16 @@ struct ex_chunk_dir {
#define c_len(x) ((x)->r_len[0]|((x)->r_len[1]<<8)|((x)->r_len[2]<<16))
#define c_start(x) ((x)->r_start)
};
+
+typedef enum ecard_type { /* Cards address space */
+ ECARD_IOC,
+ ECARD_MEMC,
+ ECARD_EASI
+} card_type_t;
+
+typedef enum { /* Speed for ECARD_IOC space */
+ ECARD_SLOW = 0,
+ ECARD_MEDIUM = 1,
+ ECARD_FAST = 2,
+ ECARD_SYNC = 3
+} card_speed_t;
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index a46d5b45676..7dca225752c 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -166,12 +166,12 @@ __dabt_svc:
@ The abort handler must return the aborted address in r0, and
@ the fault status register in r1. r9 must be preserved.
@
-#ifdef MULTI_ABORT
+#ifdef MULTI_DABORT
ldr r4, .LCprocfns
mov lr, pc
- ldr pc, [r4]
+ ldr pc, [r4, #PROCESSOR_DABT_FUNC]
#else
- bl CPU_ABORT_HANDLER
+ bl CPU_DABORT_HANDLER
#endif
@
@@ -209,14 +209,12 @@ __irq_svc:
irq_handler
#ifdef CONFIG_PREEMPT
+ str r8, [tsk, #TI_PREEMPT] @ restore preempt count
ldr r0, [tsk, #TI_FLAGS] @ get flags
+ teq r8, #0 @ if preempt count != 0
+ movne r0, #0 @ force flags to 0
tst r0, #_TIF_NEED_RESCHED
blne svc_preempt
-preempt_return:
- ldr r0, [tsk, #TI_PREEMPT] @ read preempt value
- str r8, [tsk, #TI_PREEMPT] @ restore preempt count
- teq r0, r7
- strne r0, [r0, -r0] @ bug()
#endif
ldr r0, [sp, #S_PSR] @ irqs are already disabled
msr spsr_cxsf, r0
@@ -230,19 +228,11 @@ preempt_return:
#ifdef CONFIG_PREEMPT
svc_preempt:
- teq r8, #0 @ was preempt count = 0
- ldreq r6, .LCirq_stat
- movne pc, lr @ no
- ldr r0, [r6, #4] @ local_irq_count
- ldr r1, [r6, #8] @ local_bh_count
- adds r0, r0, r1
- movne pc, lr
- mov r7, #0 @ preempt_schedule_irq
- str r7, [tsk, #TI_PREEMPT] @ expects preempt_count == 0
+ mov r8, lr
1: bl preempt_schedule_irq @ irq en/disable is done inside
ldr r0, [tsk, #TI_FLAGS] @ get new tasks TI_FLAGS
tst r0, #_TIF_NEED_RESCHED
- beq preempt_return @ go again
+ moveq pc, r8 @ go again
b 1b
#endif
@@ -293,7 +283,6 @@ __pabt_svc:
mrs r9, cpsr
tst r3, #PSR_I_BIT
biceq r9, r9, #PSR_I_BIT
- msr cpsr_c, r9
@
@ set args, then call main handler
@@ -301,7 +290,15 @@ __pabt_svc:
@ r0 - address of faulting instruction
@ r1 - pointer to registers on stack
@
- mov r0, r2 @ address (pc)
+#ifdef MULTI_PABORT
+ mov r0, r2 @ pass address of aborted instruction.
+ ldr r4, .LCprocfns
+ mov lr, pc
+ ldr pc, [r4, #PROCESSOR_PABT_FUNC]
+#else
+ CPU_PABORT_HANDLER(r0, r2)
+#endif
+ msr cpsr_c, r9 @ Maybe enable interrupts
mov r1, sp @ regs
bl do_PrefetchAbort @ call abort handler
@@ -320,16 +317,12 @@ __pabt_svc:
.align 5
.LCcralign:
.word cr_alignment
-#ifdef MULTI_ABORT
+#ifdef MULTI_DABORT
.LCprocfns:
.word processor
#endif
.LCfp:
.word fp_enter
-#ifdef CONFIG_PREEMPT
-.LCirq_stat:
- .word irq_stat
-#endif
/*
* User mode handlers
@@ -404,12 +397,12 @@ __dabt_usr:
@ The abort handler must return the aborted address in r0, and
@ the fault status register in r1.
@
-#ifdef MULTI_ABORT
+#ifdef MULTI_DABORT
ldr r4, .LCprocfns
mov lr, pc
- ldr pc, [r4]
+ ldr pc, [r4, #PROCESSOR_DABT_FUNC]
#else
- bl CPU_ABORT_HANDLER
+ bl CPU_DABORT_HANDLER
#endif
@
@@ -455,10 +448,6 @@ __irq_usr:
__und_usr:
usr_entry
- tst r3, #PSR_T_BIT @ Thumb mode?
- bne __und_usr_unknown @ ignore FP
- sub r4, r2, #4
-
@
@ fall through to the emulation code, which returns using r9 if
@ it has emulated the instruction, or the more conventional lr
@@ -468,7 +457,24 @@ __und_usr:
@
adr r9, ret_from_exception
adr lr, __und_usr_unknown
-1: ldrt r0, [r4]
+ tst r3, #PSR_T_BIT @ Thumb mode?
+ subeq r4, r2, #4 @ ARM instr at LR - 4
+ subne r4, r2, #2 @ Thumb instr at LR - 2
+1: ldreqt r0, [r4]
+ beq call_fpe
+ @ Thumb instruction
+#if __LINUX_ARM_ARCH__ >= 7
+2: ldrht r5, [r4], #2
+ and r0, r5, #0xf800 @ mask bits 111x x... .... ....
+ cmp r0, #0xe800 @ 32bit instruction if xx != 0
+ blo __und_usr_unknown
+3: ldrht r0, [r4]
+ add r2, r2, #2 @ r2 is PC + 2, make it PC + 4
+ orr r0, r0, r5, lsl #16
+#else
+ b __und_usr_unknown
+#endif
+
@
@ fallthrough to call_fpe
@
@@ -477,10 +483,14 @@ __und_usr:
* The out of line fixup for the ldrt above.
*/
.section .fixup, "ax"
-2: mov pc, r9
+4: mov pc, r9
.previous
.section __ex_table,"a"
- .long 1b, 2b
+ .long 1b, 4b
+#if __LINUX_ARM_ARCH__ >= 7
+ .long 2b, 4b
+ .long 3b, 4b
+#endif
.previous
/*
@@ -507,9 +517,16 @@ __und_usr:
* r10 = this threads thread_info structure.
* lr = unrecognised instruction return address
*/
+ @
+ @ Fall-through from Thumb-2 __und_usr
+ @
+#ifdef CONFIG_NEON
+ adr r6, .LCneon_thumb_opcodes
+ b 2f
+#endif
call_fpe:
#ifdef CONFIG_NEON
- adr r6, .LCneon_opcodes
+ adr r6, .LCneon_arm_opcodes
2:
ldr r7, [r6], #4 @ mask value
cmp r7, #0 @ end mask?
@@ -526,6 +543,7 @@ call_fpe:
1:
#endif
tst r0, #0x08000000 @ only CDP/CPRT/LDC/STC have bit 27
+ tstne r0, #0x04000000 @ bit 26 set on both ARM and Thumb-2
#if defined(CONFIG_CPU_ARM610) || defined(CONFIG_CPU_ARM710)
and r8, r0, #0x0f000000 @ mask out op-code bits
teqne r8, #0x0f000000 @ SWI (ARM6/7 bug)?
@@ -577,7 +595,7 @@ call_fpe:
#ifdef CONFIG_NEON
.align 6
-.LCneon_opcodes:
+.LCneon_arm_opcodes:
.word 0xfe000000 @ mask
.word 0xf2000000 @ opcode
@@ -586,6 +604,16 @@ call_fpe:
.word 0x00000000 @ mask
.word 0x00000000 @ opcode
+
+.LCneon_thumb_opcodes:
+ .word 0xef000000 @ mask
+ .word 0xef000000 @ opcode
+
+ .word 0xff100000 @ mask
+ .word 0xf9000000 @ opcode
+
+ .word 0x00000000 @ mask
+ .word 0x00000000 @ opcode
#endif
do_fpe:
@@ -619,8 +647,15 @@ __und_usr_unknown:
__pabt_usr:
usr_entry
+#ifdef MULTI_PABORT
+ mov r0, r2 @ pass address of aborted instruction.
+ ldr r4, .LCprocfns
+ mov lr, pc
+ ldr pc, [r4, #PROCESSOR_PABT_FUNC]
+#else
+ CPU_PABORT_HANDLER(r0, r2)
+#endif
enable_irq @ Enable interrupts
- mov r0, r2 @ address (pc)
mov r1, sp @ regs
bl do_PrefetchAbort @ call abort handler
/* fall through */
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 6c90c50a9ee..597ed00a08d 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -352,6 +352,11 @@ sys_mmap2:
b do_mmap2
#endif
+ENTRY(pabort_ifar)
+ mrc p15, 0, r0, cr6, cr0, 2
+ENTRY(pabort_noifar)
+ mov pc, lr
+
#ifdef CONFIG_OABI_COMPAT
/*
diff --git a/arch/arm/kernel/head-common.S b/arch/arm/kernel/head-common.S
index 50f667febe2..7e9c00a8a41 100644
--- a/arch/arm/kernel/head-common.S
+++ b/arch/arm/kernel/head-common.S
@@ -75,8 +75,13 @@ __error_p:
#ifdef CONFIG_DEBUG_LL
adr r0, str_p1
bl printascii
+ mov r0, r9
+ bl printhex8
+ adr r0, str_p2
+ bl printascii
b __error
-str_p1: .asciz "\nError: unrecognized/unsupported processor variant.\n"
+str_p1: .asciz "\nError: unrecognized/unsupported processor variant (0x"
+str_p2: .asciz ").\n"
.align
#endif
diff --git a/arch/arm/kernel/init_task.c b/arch/arm/kernel/init_task.c
index bd4ef53bc6b..8b8c9d38a76 100644
--- a/arch/arm/kernel/init_task.c
+++ b/arch/arm/kernel/init_task.c
@@ -13,7 +13,6 @@
#include <asm/pgtable.h>
static struct fs_struct init_fs = INIT_FS;
-static struct files_struct init_files = INIT_FILES;
static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
struct mm_struct init_mm = INIT_MM(init_mm);
diff --git a/arch/arm/kernel/kprobes-decode.c b/arch/arm/kernel/kprobes-decode.c
index d51bc8b6055..b4565bb133c 100644
--- a/arch/arm/kernel/kprobes-decode.c
+++ b/arch/arm/kernel/kprobes-decode.c
@@ -1176,7 +1176,7 @@ space_cccc_001x(kprobe_opcode_t insn, struct arch_specific_insn *asi)
* *S (bit 20) updates condition codes
* ADC/SBC/RSC reads the C flag
*/
- insn &= 0xfff00ff0; /* Rn = r0, Rd = r0 */
+ insn &= 0xfff00fff; /* Rn = r0, Rd = r0 */
asi->insn[0] = insn;
asi->insn_handler = (insn & (1 << 20)) ? /* S-bit */
emulate_alu_imm_rwflags : emulate_alu_imm_rflags;
diff --git a/arch/arm/kernel/kprobes.c b/arch/arm/kernel/kprobes.c
index 13e371aad87..5593dd20721 100644
--- a/arch/arm/kernel/kprobes.c
+++ b/arch/arm/kernel/kprobes.c
@@ -66,7 +66,7 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
return -ENOMEM;
for (is = 0; is < MAX_INSN_SIZE; ++is)
p->ainsn.insn[is] = tmp_insn[is];
- flush_insns(&p->ainsn.insn, MAX_INSN_SIZE);
+ flush_insns(p->ainsn.insn, MAX_INSN_SIZE);
break;
case INSN_GOOD_NO_SLOT: /* instruction doesn't need insn slot */
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 46bf2ede612..199b3680118 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -133,10 +133,8 @@ static void default_idle(void)
cpu_relax();
else {
local_irq_disable();
- if (!need_resched()) {
- timer_dyn_reprogram();
+ if (!need_resched())
arch_idle();
- }
local_irq_enable();
}
}
diff --git a/arch/arm/kernel/semaphore.c b/arch/arm/kernel/semaphore.c
deleted file mode 100644
index 981fe5c6ccb..00000000000
--- a/arch/arm/kernel/semaphore.c
+++ /dev/null
@@ -1,221 +0,0 @@
-/*
- * ARM semaphore implementation, taken from
- *
- * i386 semaphore implementation.
- *
- * (C) Copyright 1999 Linus Torvalds
- *
- * Modified for ARM by Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-
-#include <asm/semaphore.h>
-
-/*
- * Semaphores are implemented using a two-way counter:
- * The "count" variable is decremented for each process
- * that tries to acquire the semaphore, while the "sleeping"
- * variable is a count of such acquires.
- *
- * Notably, the inline "up()" and "down()" functions can
- * efficiently test if they need to do any extra work (up
- * needs to do something only if count was negative before
- * the increment operation.
- *
- * "sleeping" and the contention routine ordering is
- * protected by the semaphore spinlock.
- *
- * Note that these functions are only called when there is
- * contention on the lock, and as such all this is the
- * "non-critical" part of the whole semaphore business. The
- * critical part is the inline stuff in <asm/semaphore.h>
- * where we want to avoid any extra jumps and calls.
- */
-
-/*
- * Logic:
- * - only on a boundary condition do we need to care. When we go
- * from a negative count to a non-negative, we wake people up.
- * - when we go from a non-negative count to a negative do we
- * (a) synchronize with the "sleeper" count and (b) make sure
- * that we're on the wakeup list before we synchronize so that
- * we cannot lose wakeup events.
- */
-
-void __up(struct semaphore *sem)
-{
- wake_up(&sem->wait);
-}
-
-static DEFINE_SPINLOCK(semaphore_lock);
-
-void __sched __down(struct semaphore * sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- tsk->state = TASK_UNINTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- spin_lock_irq(&semaphore_lock);
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irq(&semaphore_lock);
-
- schedule();
- tsk->state = TASK_UNINTERRUPTIBLE;
- spin_lock_irq(&semaphore_lock);
- }
- spin_unlock_irq(&semaphore_lock);
- remove_wait_queue(&sem->wait, &wait);
- tsk->state = TASK_RUNNING;
- wake_up(&sem->wait);
-}
-
-int __sched __down_interruptible(struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- tsk->state = TASK_INTERRUPTIBLE;
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- spin_lock_irq(&semaphore_lock);
- sem->sleepers ++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * With signals pending, this turns into
- * the trylock failure case - we won't be
- * sleeping, and we* can't get the lock as
- * it has contention. Just correct the count
- * and exit.
- */
- if (signal_pending(current)) {
- retval = -EINTR;
- sem->sleepers = 0;
- atomic_add(sleepers, &sem->count);
- break;
- }
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock. The
- * "-1" is because we're still hoping to get
- * the lock.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irq(&semaphore_lock);
-
- schedule();
- tsk->state = TASK_INTERRUPTIBLE;
- spin_lock_irq(&semaphore_lock);
- }
- spin_unlock_irq(&semaphore_lock);
- tsk->state = TASK_RUNNING;
- remove_wait_queue(&sem->wait, &wait);
- wake_up(&sem->wait);
- return retval;
-}
-
-/*
- * Trylock failed - make sure we correct for
- * having decremented the count.
- *
- * We could have done the trylock with a
- * single "cmpxchg" without failure cases,
- * but then it wouldn't work on a 386.
- */
-int __down_trylock(struct semaphore * sem)
-{
- int sleepers;
- unsigned long flags;
-
- spin_lock_irqsave(&semaphore_lock, flags);
- sleepers = sem->sleepers + 1;
- sem->sleepers = 0;
-
- /*
- * Add "everybody else" and us into it. They aren't
- * playing, because we own the spinlock.
- */
- if (!atomic_add_negative(sleepers, &sem->count))
- wake_up(&sem->wait);
-
- spin_unlock_irqrestore(&semaphore_lock, flags);
- return 1;
-}
-
-/*
- * The semaphore operations have a special calling sequence that
- * allow us to do a simpler in-line version of them. These routines
- * need to convert that sequence back into the C sequence when
- * there is contention on the semaphore.
- *
- * ip contains the semaphore pointer on entry. Save the C-clobbered
- * registers (r0 to r3 and lr), but not ip, as we use it as a return
- * value in some cases..
- * To remain AAPCS compliant (64-bit stack align) we save r4 as well.
- */
-asm(" .section .sched.text,\"ax\",%progbits \n\
- .align 5 \n\
- .globl __down_failed \n\
-__down_failed: \n\
- stmfd sp!, {r0 - r4, lr} \n\
- mov r0, ip \n\
- bl __down \n\
- ldmfd sp!, {r0 - r4, pc} \n\
- \n\
- .align 5 \n\
- .globl __down_interruptible_failed \n\
-__down_interruptible_failed: \n\
- stmfd sp!, {r0 - r4, lr} \n\
- mov r0, ip \n\
- bl __down_interruptible \n\
- mov ip, r0 \n\
- ldmfd sp!, {r0 - r4, pc} \n\
- \n\
- .align 5 \n\
- .globl __down_trylock_failed \n\
-__down_trylock_failed: \n\
- stmfd sp!, {r0 - r4, lr} \n\
- mov r0, ip \n\
- bl __down_trylock \n\
- mov ip, r0 \n\
- ldmfd sp!, {r0 - r4, pc} \n\
- \n\
- .align 5 \n\
- .globl __up_wakeup \n\
-__up_wakeup: \n\
- stmfd sp!, {r0 - r4, lr} \n\
- mov r0, ip \n\
- bl __up \n\
- ldmfd sp!, {r0 - r4, pc} \n\
- ");
-
-EXPORT_SYMBOL(__down_failed);
-EXPORT_SYMBOL(__down_interruptible_failed);
-EXPORT_SYMBOL(__down_trylock_failed);
-EXPORT_SYMBOL(__up_wakeup);
diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c
index ae31deb2d06..90e0c35ae60 100644
--- a/arch/arm/kernel/stacktrace.c
+++ b/arch/arm/kernel/stacktrace.c
@@ -36,6 +36,7 @@ EXPORT_SYMBOL(walk_stackframe);
#ifdef CONFIG_STACKTRACE
struct stack_trace_data {
struct stack_trace *trace;
+ unsigned int no_sched_functions;
unsigned int skip;
};
@@ -43,27 +44,52 @@ static int save_trace(struct stackframe *frame, void *d)
{
struct stack_trace_data *data = d;
struct stack_trace *trace = data->trace;
+ unsigned long addr = frame->lr;
+ if (data->no_sched_functions && in_sched_functions(addr))
+ return 0;
if (data->skip) {
data->skip--;
return 0;
}
- trace->entries[trace->nr_entries++] = frame->lr;
+ trace->entries[trace->nr_entries++] = addr;
return trace->nr_entries >= trace->max_entries;
}
-void save_stack_trace(struct stack_trace *trace)
+void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
struct stack_trace_data data;
unsigned long fp, base;
data.trace = trace;
data.skip = trace->skip;
- base = (unsigned long)task_stack_page(current);
- asm("mov %0, fp" : "=r" (fp));
+ base = (unsigned long)task_stack_page(tsk);
+
+ if (tsk != current) {
+#ifdef CONFIG_SMP
+ /*
+ * What guarantees do we have here that 'tsk'
+ * is not running on another CPU?
+ */
+ BUG();
+#else
+ data.no_sched_functions = 1;
+ fp = thread_saved_fp(tsk);
+#endif
+ } else {
+ data.no_sched_functions = 0;
+ asm("mov %0, fp" : "=r" (fp));
+ }
walk_stackframe(fp, base, base + THREAD_SIZE, save_trace, &data);
+ if (trace->nr_entries < trace->max_entries)
+ trace->entries[trace->nr_entries++] = ULONG_MAX;
+}
+
+void save_stack_trace(struct stack_trace *trace)
+{
+ save_stack_trace_tsk(current, trace);
}
#endif
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index 9bd1870d980..0128687ba0f 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -34,23 +34,6 @@ extern unsigned long do_mremap(unsigned long addr, unsigned long old_len,
unsigned long new_len, unsigned long flags,
unsigned long new_addr);
-/*
- * sys_pipe() is the normal C calling standard for creating
- * a pipe. It's not the way unix traditionally does this, though.
- */
-asmlinkage int sys_pipe(unsigned long __user *fildes)
-{
- int fd[2];
- int error;
-
- error = do_pipe(fd);
- if (!error) {
- if (copy_to_user(fildes, fd, 2*sizeof(int)))
- error = -EFAULT;
- }
- return error;
-}
-
/* common code for old and new mmaps */
inline long do_mmap2(
unsigned long addr, unsigned long len,
diff --git a/arch/arm/kernel/sys_oabi-compat.c b/arch/arm/kernel/sys_oabi-compat.c
index e8b98046895..96ab5f52949 100644
--- a/arch/arm/kernel/sys_oabi-compat.c
+++ b/arch/arm/kernel/sys_oabi-compat.c
@@ -25,6 +25,7 @@
* sys_stat64:
* sys_lstat64:
* sys_fstat64:
+ * sys_fstatat64:
*
* struct stat64 has different sizes and some members are shifted
* Compatibility wrappers are needed for them and provided below.
@@ -169,6 +170,29 @@ asmlinkage long sys_oabi_fstat64(unsigned long fd,
return error;
}
+asmlinkage long sys_oabi_fstatat64(int dfd,
+ char __user *filename,
+ struct oldabi_stat64 __user *statbuf,
+ int flag)
+{
+ struct kstat stat;
+ int error = -EINVAL;
+
+ if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
+ goto out;
+
+ if (flag & AT_SYMLINK_NOFOLLOW)
+ error = vfs_lstat_fd(dfd, filename, &stat);
+ else
+ error = vfs_stat_fd(dfd, filename, &stat);
+
+ if (!error)
+ error = cp_oldabi_stat64(&stat, statbuf);
+
+out:
+ return error;
+}
+
struct oabi_flock64 {
short l_type;
short l_whence;
diff --git a/arch/arm/kernel/thumbee.c b/arch/arm/kernel/thumbee.c
new file mode 100644
index 00000000000..df3f6b7ebce
--- /dev/null
+++ b/arch/arm/kernel/thumbee.c
@@ -0,0 +1,81 @@
+/*
+ * arch/arm/kernel/thumbee.c
+ *
+ * Copyright (C) 2008 ARM Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/thread_notify.h>
+
+/*
+ * Access to the ThumbEE Handler Base register
+ */
+static inline unsigned long teehbr_read()
+{
+ unsigned long v;
+ asm("mrc p14, 6, %0, c1, c0, 0\n" : "=r" (v));
+ return v;
+}
+
+static inline void teehbr_write(unsigned long v)
+{
+ asm("mcr p14, 6, %0, c1, c0, 0\n" : : "r" (v));
+}
+
+static int thumbee_notifier(struct notifier_block *self, unsigned long cmd, void *t)
+{
+ struct thread_info *thread = t;
+
+ switch (cmd) {
+ case THREAD_NOTIFY_FLUSH:
+ thread->thumbee_state = 0;
+ break;
+ case THREAD_NOTIFY_SWITCH:
+ current_thread_info()->thumbee_state = teehbr_read();
+ teehbr_write(thread->thumbee_state);
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block thumbee_notifier_block = {
+ .notifier_call = thumbee_notifier,
+};
+
+static int __init thumbee_init(void)
+{
+ unsigned long pfr0;
+ unsigned int cpu_arch = cpu_architecture();
+
+ if (cpu_arch < CPU_ARCH_ARMv7)
+ return 0;
+
+ /* processor feature register 0 */
+ asm("mrc p15, 0, %0, c0, c1, 0\n" : "=r" (pfr0));
+ if ((pfr0 & 0x0000f000) != 0x00001000)
+ return 0;
+
+ printk(KERN_INFO "ThumbEE CPU extension supported.\n");
+ elf_hwcap |= HWCAP_THUMBEE;
+ thread_register_notifier(&thumbee_notifier_block);
+
+ return 0;
+}
+
+late_initcall(thumbee_init);
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index b5867eca1d0..cc5145b28e7 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -365,108 +365,6 @@ static struct sysdev_class timer_sysclass = {
.resume = timer_resume,
};
-#ifdef CONFIG_NO_IDLE_HZ
-static int timer_dyn_tick_enable(void)
-{
- struct dyn_tick_timer *dyn_tick = system_timer->dyn_tick;
- unsigned long flags;
- int ret = -ENODEV;
-
- if (dyn_tick) {
- spin_lock_irqsave(&dyn_tick->lock, flags);
- ret = 0;
- if (!(dyn_tick->state & DYN_TICK_ENABLED)) {
- ret = dyn_tick->enable();
-
- if (ret == 0)
- dyn_tick->state |= DYN_TICK_ENABLED;
- }
- spin_unlock_irqrestore(&dyn_tick->lock, flags);
- }
-
- return ret;
-}
-
-static int timer_dyn_tick_disable(void)
-{
- struct dyn_tick_timer *dyn_tick = system_timer->dyn_tick;
- unsigned long flags;
- int ret = -ENODEV;
-
- if (dyn_tick) {
- spin_lock_irqsave(&dyn_tick->lock, flags);
- ret = 0;
- if (dyn_tick->state & DYN_TICK_ENABLED) {
- ret = dyn_tick->disable();
-
- if (ret == 0)
- dyn_tick->state &= ~DYN_TICK_ENABLED;
- }
- spin_unlock_irqrestore(&dyn_tick->lock, flags);
- }
-
- return ret;
-}
-
-/*
- * Reprogram the system timer for at least the calculated time interval.
- * This function should be called from the idle thread with IRQs disabled,
- * immediately before sleeping.
- */
-void timer_dyn_reprogram(void)
-{
- struct dyn_tick_timer *dyn_tick = system_timer->dyn_tick;
- unsigned long next, seq, flags;
-
- if (!dyn_tick)
- return;
-
- spin_lock_irqsave(&dyn_tick->lock, flags);
- if (dyn_tick->state & DYN_TICK_ENABLED) {
- next = next_timer_interrupt();
- do {
- seq = read_seqbegin(&xtime_lock);
- dyn_tick->reprogram(next - jiffies);
- } while (read_seqretry(&xtime_lock, seq));
- }
- spin_unlock_irqrestore(&dyn_tick->lock, flags);
-}
-
-static ssize_t timer_show_dyn_tick(struct sys_device *dev, char *buf)
-{
- return sprintf(buf, "%i\n",
- (system_timer->dyn_tick->state & DYN_TICK_ENABLED) >> 1);
-}
-
-static ssize_t timer_set_dyn_tick(struct sys_device *dev, const char *buf,
- size_t count)
-{
- unsigned int enable = simple_strtoul(buf, NULL, 2);
-
- if (enable)
- timer_dyn_tick_enable();
- else
- timer_dyn_tick_disable();
-
- return count;
-}
-static SYSDEV_ATTR(dyn_tick, 0644, timer_show_dyn_tick, timer_set_dyn_tick);
-
-/*
- * dyntick=enable|disable
- */
-static char dyntick_str[4] __initdata = "";
-
-static int __init dyntick_setup(char *str)
-{
- if (str)
- strlcpy(dyntick_str, str, sizeof(dyntick_str));
- return 1;
-}
-
-__setup("dyntick=", dyntick_setup);
-#endif
-
static int __init timer_init_sysfs(void)
{
int ret = sysdev_class_register(&timer_sysclass);
@@ -475,19 +373,6 @@ static int __init timer_init_sysfs(void)
ret = sysdev_register(&system_timer->dev);
}
-#ifdef CONFIG_NO_IDLE_HZ
- if (ret == 0 && system_timer->dyn_tick) {
- ret = sysdev_create_file(&system_timer->dev, &attr_dyn_tick);
-
- /*
- * Turn on dynamic tick after calibrate delay
- * for correct bogomips
- */
- if (ret == 0 && dyntick_str[0] == 'e')
- ret = timer_dyn_tick_enable();
- }
-#endif
-
return ret;
}
@@ -500,10 +385,5 @@ void __init time_init(void)
system_timer->offset = dummy_gettimeoffset;
#endif
system_timer->init();
-
-#ifdef CONFIG_NO_IDLE_HZ
- if (system_timer->dyn_tick)
- spin_lock_init(&system_timer->dyn_tick->lock);
-#endif
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-31 20:56:07 +0000