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-rw-r--r--arch/arm/kernel/Makefile2
-rw-r--r--arch/arm/kernel/debug.S27
-rw-r--r--arch/arm/kernel/dma-isa.c67
-rw-r--r--arch/arm/kernel/dma.c119
-rw-r--r--arch/arm/kernel/entry-armv.S19
-rw-r--r--arch/arm/kernel/entry-common.S4
-rw-r--r--arch/arm/kernel/irq.c20
-rw-r--r--arch/arm/kernel/module.c73
-rw-r--r--arch/arm/kernel/process.c33
-rw-r--r--arch/arm/kernel/ptrace.c58
-rw-r--r--arch/arm/kernel/setup.c5
-rw-r--r--arch/arm/kernel/smp.c2
-rw-r--r--arch/arm/kernel/stacktrace.c88
-rw-r--r--arch/arm/kernel/stacktrace.h9
-rw-r--r--arch/arm/kernel/time.c21
-rw-r--r--arch/arm/kernel/traps.c44
-rw-r--r--arch/arm/kernel/unwind.c434
-rw-r--r--arch/arm/kernel/vmlinux.lds.S21
18 files changed, 879 insertions, 167 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 4305345987d..11a5197a221 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -29,12 +29,14 @@ obj-$(CONFIG_ATAGS_PROC) += atags.o
obj-$(CONFIG_OABI_COMPAT) += sys_oabi-compat.o
obj-$(CONFIG_ARM_THUMBEE) += thumbee.o
obj-$(CONFIG_KGDB) += kgdb.o
+obj-$(CONFIG_ARM_UNWIND) += unwind.o
obj-$(CONFIG_CRUNCH) += crunch.o crunch-bits.o
AFLAGS_crunch-bits.o := -Wa,-mcpu=ep9312
obj-$(CONFIG_CPU_XSCALE) += xscale-cp0.o
obj-$(CONFIG_CPU_XSC3) += xscale-cp0.o
+obj-$(CONFIG_CPU_MOHAWK) += xscale-cp0.o
obj-$(CONFIG_IWMMXT) += iwmmxt.o
AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt
diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S
index f53c5829054..b121b6053cc 100644
--- a/arch/arm/kernel/debug.S
+++ b/arch/arm/kernel/debug.S
@@ -49,6 +49,33 @@
1002:
.endm
+#elif defined(CONFIG_CPU_XSCALE)
+
+ .macro addruart, rx
+ .endm
+
+ .macro senduart, rd, rx
+ mcr p14, 0, \rd, c8, c0, 0
+ .endm
+
+ .macro busyuart, rd, rx
+1001:
+ mrc p14, 0, \rx, c14, c0, 0
+ tst \rx, #0x10000000
+ beq 1001b
+ .endm
+
+ .macro waituart, rd, rx
+ mov \rd, #0x10000000
+1001:
+ subs \rd, \rd, #1
+ bmi 1002f
+ mrc p14, 0, \rx, c14, c0, 0
+ tst \rx, #0x10000000
+ bne 1001b
+1002:
+ .endm
+
#else
.macro addruart, rx
diff --git a/arch/arm/kernel/dma-isa.c b/arch/arm/kernel/dma-isa.c
index 4a3a50495c6..0e88e46fc73 100644
--- a/arch/arm/kernel/dma-isa.c
+++ b/arch/arm/kernel/dma-isa.c
@@ -24,11 +24,6 @@
#include <asm/dma.h>
#include <asm/mach/dma.h>
-#define ISA_DMA_MODE_READ 0x44
-#define ISA_DMA_MODE_WRITE 0x48
-#define ISA_DMA_MODE_CASCADE 0xc0
-#define ISA_DMA_AUTOINIT 0x10
-
#define ISA_DMA_MASK 0
#define ISA_DMA_MODE 1
#define ISA_DMA_CLRFF 2
@@ -49,38 +44,35 @@ static unsigned int isa_dma_port[8][7] = {
{ 0xd4, 0xd6, 0xd8, 0x48a, 0x08a, 0xcc, 0xce }
};
-static int isa_get_dma_residue(dmach_t channel, dma_t *dma)
+static int isa_get_dma_residue(unsigned int chan, dma_t *dma)
{
- unsigned int io_port = isa_dma_port[channel][ISA_DMA_COUNT];
+ unsigned int io_port = isa_dma_port[chan][ISA_DMA_COUNT];
int count;
count = 1 + inb(io_port);
count |= inb(io_port) << 8;
- return channel < 4 ? count : (count << 1);
+ return chan < 4 ? count : (count << 1);
}
-static void isa_enable_dma(dmach_t channel, dma_t *dma)
+static void isa_enable_dma(unsigned int chan, dma_t *dma)
{
if (dma->invalid) {
unsigned long address, length;
unsigned int mode;
enum dma_data_direction direction;
- mode = channel & 3;
+ mode = (chan & 3) | dma->dma_mode;
switch (dma->dma_mode & DMA_MODE_MASK) {
case DMA_MODE_READ:
- mode |= ISA_DMA_MODE_READ;
direction = DMA_FROM_DEVICE;
break;
case DMA_MODE_WRITE:
- mode |= ISA_DMA_MODE_WRITE;
direction = DMA_TO_DEVICE;
break;
case DMA_MODE_CASCADE:
- mode |= ISA_DMA_MODE_CASCADE;
direction = DMA_BIDIRECTIONAL;
break;
@@ -105,34 +97,31 @@ static void isa_enable_dma(dmach_t channel, dma_t *dma)
address = dma->buf.dma_address;
length = dma->buf.length - 1;
- outb(address >> 16, isa_dma_port[channel][ISA_DMA_PGLO]);
- outb(address >> 24, isa_dma_port[channel][ISA_DMA_PGHI]);
+ outb(address >> 16, isa_dma_port[chan][ISA_DMA_PGLO]);
+ outb(address >> 24, isa_dma_port[chan][ISA_DMA_PGHI]);
- if (channel >= 4) {
+ if (chan >= 4) {
address >>= 1;
length >>= 1;
}
- outb(0, isa_dma_port[channel][ISA_DMA_CLRFF]);
-
- outb(address, isa_dma_port[channel][ISA_DMA_ADDR]);
- outb(address >> 8, isa_dma_port[channel][ISA_DMA_ADDR]);
+ outb(0, isa_dma_port[chan][ISA_DMA_CLRFF]);
- outb(length, isa_dma_port[channel][ISA_DMA_COUNT]);
- outb(length >> 8, isa_dma_port[channel][ISA_DMA_COUNT]);
+ outb(address, isa_dma_port[chan][ISA_DMA_ADDR]);
+ outb(address >> 8, isa_dma_port[chan][ISA_DMA_ADDR]);
- if (dma->dma_mode & DMA_AUTOINIT)
- mode |= ISA_DMA_AUTOINIT;
+ outb(length, isa_dma_port[chan][ISA_DMA_COUNT]);
+ outb(length >> 8, isa_dma_port[chan][ISA_DMA_COUNT]);
- outb(mode, isa_dma_port[channel][ISA_DMA_MODE]);
+ outb(mode, isa_dma_port[chan][ISA_DMA_MODE]);
dma->invalid = 0;
}
- outb(channel & 3, isa_dma_port[channel][ISA_DMA_MASK]);
+ outb(chan & 3, isa_dma_port[chan][ISA_DMA_MASK]);
}
-static void isa_disable_dma(dmach_t channel, dma_t *dma)
+static void isa_disable_dma(unsigned int chan, dma_t *dma)
{
- outb(channel | 4, isa_dma_port[channel][ISA_DMA_MASK]);
+ outb(chan | 4, isa_dma_port[chan][ISA_DMA_MASK]);
}
static struct dma_ops isa_dma_ops = {
@@ -160,7 +149,12 @@ static struct resource dma_resources[] = { {
.end = 0x048f
} };
-void __init isa_init_dma(dma_t *dma)
+static dma_t isa_dma[8];
+
+/*
+ * ISA DMA always starts at channel 0
+ */
+void __init isa_init_dma(void)
{
/*
* Try to autodetect presence of an ISA DMA controller.
@@ -178,11 +172,11 @@ void __init isa_init_dma(dma_t *dma)
outb(0xaa, 0x00);
if (inb(0) == 0x55 && inb(0) == 0xaa) {
- int channel, i;
+ unsigned int chan, i;
- for (channel = 0; channel < 8; channel++) {
- dma[channel].d_ops = &isa_dma_ops;
- isa_disable_dma(channel, NULL);
+ for (chan = 0; chan < 8; chan++) {
+ isa_dma[chan].d_ops = &isa_dma_ops;
+ isa_disable_dma(chan, NULL);
}
outb(0x40, 0x0b);
@@ -217,5 +211,12 @@ void __init isa_init_dma(dma_t *dma)
for (i = 0; i < ARRAY_SIZE(dma_resources); i++)
request_resource(&ioport_resource, dma_resources + i);
+
+ for (chan = 0; chan < 8; chan++) {
+ int ret = isa_dma_add(chan, &isa_dma[chan]);
+ if (ret)
+ printk(KERN_ERR "ISADMA%u: unable to register: %d\n",
+ chan, ret);
+ }
}
}
diff --git a/arch/arm/kernel/dma.c b/arch/arm/kernel/dma.c
index d006085ed7e..7d5b9fb01e7 100644
--- a/arch/arm/kernel/dma.c
+++ b/arch/arm/kernel/dma.c
@@ -15,6 +15,7 @@
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
+#include <linux/scatterlist.h>
#include <asm/dma.h>
@@ -23,19 +24,40 @@
DEFINE_SPINLOCK(dma_spin_lock);
EXPORT_SYMBOL(dma_spin_lock);
-static dma_t dma_chan[MAX_DMA_CHANNELS];
+static dma_t *dma_chan[MAX_DMA_CHANNELS];
+
+static inline dma_t *dma_channel(unsigned int chan)
+{
+ if (chan >= MAX_DMA_CHANNELS)
+ return NULL;
+
+ return dma_chan[chan];
+}
+
+int __init isa_dma_add(unsigned int chan, dma_t *dma)
+{
+ if (!dma->d_ops)
+ return -EINVAL;
+
+ sg_init_table(&dma->buf, 1);
+
+ if (dma_chan[chan])
+ return -EBUSY;
+ dma_chan[chan] = dma;
+ return 0;
+}
/*
* Request DMA channel
*
* On certain platforms, we have to allocate an interrupt as well...
*/
-int request_dma(dmach_t channel, const char *device_id)
+int request_dma(unsigned int chan, const char *device_id)
{
- dma_t *dma = dma_chan + channel;
+ dma_t *dma = dma_channel(chan);
int ret;
- if (channel >= MAX_DMA_CHANNELS || !dma->d_ops)
+ if (!dma)
goto bad_dma;
if (xchg(&dma->lock, 1) != 0)
@@ -47,7 +69,7 @@ int request_dma(dmach_t channel, const char *device_id)
ret = 0;
if (dma->d_ops->request)
- ret = dma->d_ops->request(channel, dma);
+ ret = dma->d_ops->request(chan, dma);
if (ret)
xchg(&dma->lock, 0);
@@ -55,7 +77,7 @@ int request_dma(dmach_t channel, const char *device_id)
return ret;
bad_dma:
- printk(KERN_ERR "dma: trying to allocate DMA%d\n", channel);
+ printk(KERN_ERR "dma: trying to allocate DMA%d\n", chan);
return -EINVAL;
busy:
@@ -68,42 +90,42 @@ EXPORT_SYMBOL(request_dma);
*
* On certain platforms, we have to free interrupt as well...
*/
-void free_dma(dmach_t channel)
+void free_dma(unsigned int chan)
{
- dma_t *dma = dma_chan + channel;
+ dma_t *dma = dma_channel(chan);
- if (channel >= MAX_DMA_CHANNELS || !dma->d_ops)
+ if (!dma)
goto bad_dma;
if (dma->active) {
- printk(KERN_ERR "dma%d: freeing active DMA\n", channel);
- dma->d_ops->disable(channel, dma);
+ printk(KERN_ERR "dma%d: freeing active DMA\n", chan);
+ dma->d_ops->disable(chan, dma);
dma->active = 0;
}
if (xchg(&dma->lock, 0) != 0) {
if (dma->d_ops->free)
- dma->d_ops->free(channel, dma);
+ dma->d_ops->free(chan, dma);
return;
}
- printk(KERN_ERR "dma%d: trying to free free DMA\n", channel);
+ printk(KERN_ERR "dma%d: trying to free free DMA\n", chan);
return;
bad_dma:
- printk(KERN_ERR "dma: trying to free DMA%d\n", channel);
+ printk(KERN_ERR "dma: trying to free DMA%d\n", chan);
}
EXPORT_SYMBOL(free_dma);
/* Set DMA Scatter-Gather list
*/
-void set_dma_sg (dmach_t channel, struct scatterlist *sg, int nr_sg)
+void set_dma_sg (unsigned int chan, struct scatterlist *sg, int nr_sg)
{
- dma_t *dma = dma_chan + channel;
+ dma_t *dma = dma_channel(chan);
if (dma->active)
printk(KERN_ERR "dma%d: altering DMA SG while "
- "DMA active\n", channel);
+ "DMA active\n", chan);
dma->sg = sg;
dma->sgcount = nr_sg;
@@ -115,13 +137,13 @@ EXPORT_SYMBOL(set_dma_sg);
*
* Copy address to the structure, and set the invalid bit
*/
-void __set_dma_addr (dmach_t channel, void *addr)
+void __set_dma_addr (unsigned int chan, void *addr)
{
- dma_t *dma = dma_chan + channel;
+ dma_t *dma = dma_channel(chan);
if (dma->active)
printk(KERN_ERR "dma%d: altering DMA address while "
- "DMA active\n", channel);
+ "DMA active\n", chan);
dma->sg = NULL;
dma->addr = addr;
@@ -133,13 +155,13 @@ EXPORT_SYMBOL(__set_dma_addr);
*
* Copy address to the structure, and set the invalid bit
*/
-void set_dma_count (dmach_t channel, unsigned long count)
+void set_dma_count (unsigned int chan, unsigned long count)
{
- dma_t *dma = dma_chan + channel;
+ dma_t *dma = dma_channel(chan);
if (dma->active)
printk(KERN_ERR "dma%d: altering DMA count while "
- "DMA active\n", channel);
+ "DMA active\n", chan);
dma->sg = NULL;
dma->count = count;
@@ -149,13 +171,13 @@ EXPORT_SYMBOL(set_dma_count);
/* Set DMA direction mode
*/
-void set_dma_mode (dmach_t channel, dmamode_t mode)
+void set_dma_mode (unsigned int chan, unsigned int mode)
{
- dma_t *dma = dma_chan + channel;
+ dma_t *dma = dma_channel(chan);
if (dma->active)
printk(KERN_ERR "dma%d: altering DMA mode while "
- "DMA active\n", channel);
+ "DMA active\n", chan);
dma->dma_mode = mode;
dma->invalid = 1;
@@ -164,42 +186,42 @@ EXPORT_SYMBOL(set_dma_mode);
/* Enable DMA channel
*/
-void enable_dma (dmach_t channel)
+void enable_dma (unsigned int chan)
{
- dma_t *dma = dma_chan + channel;
+ dma_t *dma = dma_channel(chan);
if (!dma->lock)
goto free_dma;
if (dma->active == 0) {
dma->active = 1;
- dma->d_ops->enable(channel, dma);
+ dma->d_ops->enable(chan, dma);
}
return;
free_dma:
- printk(KERN_ERR "dma%d: trying to enable free DMA\n", channel);
+ printk(KERN_ERR "dma%d: trying to enable free DMA\n", chan);
BUG();
}
EXPORT_SYMBOL(enable_dma);
/* Disable DMA channel
*/
-void disable_dma (dmach_t channel)
+void disable_dma (unsigned int chan)
{
- dma_t *dma = dma_chan + channel;
+ dma_t *dma = dma_channel(chan);
if (!dma->lock)
goto free_dma;
if (dma->active == 1) {
dma->active = 0;
- dma->d_ops->disable(channel, dma);
+ dma->d_ops->disable(chan, dma);
}
return;
free_dma:
- printk(KERN_ERR "dma%d: trying to disable free DMA\n", channel);
+ printk(KERN_ERR "dma%d: trying to disable free DMA\n", chan);
BUG();
}
EXPORT_SYMBOL(disable_dma);
@@ -207,45 +229,38 @@ EXPORT_SYMBOL(disable_dma);
/*
* Is the specified DMA channel active?
*/
-int dma_channel_active(dmach_t channel)
+int dma_channel_active(unsigned int chan)
{
- return dma_chan[channel].active;
+ dma_t *dma = dma_channel(chan);
+ return dma->active;
}
EXPORT_SYMBOL(dma_channel_active);
-void set_dma_page(dmach_t channel, char pagenr)
+void set_dma_page(unsigned int chan, char pagenr)
{
- printk(KERN_ERR "dma%d: trying to set_dma_page\n", channel);
+ printk(KERN_ERR "dma%d: trying to set_dma_page\n", chan);
}
EXPORT_SYMBOL(set_dma_page);
-void set_dma_speed(dmach_t channel, int cycle_ns)
+void set_dma_speed(unsigned int chan, int cycle_ns)
{
- dma_t *dma = dma_chan + channel;
+ dma_t *dma = dma_channel(chan);
int ret = 0;
if (dma->d_ops->setspeed)
- ret = dma->d_ops->setspeed(channel, dma, cycle_ns);
+ ret = dma->d_ops->setspeed(chan, dma, cycle_ns);
dma->speed = ret;
}
EXPORT_SYMBOL(set_dma_speed);
-int get_dma_residue(dmach_t channel)
+int get_dma_residue(unsigned int chan)
{
- dma_t *dma = dma_chan + channel;
+ dma_t *dma = dma_channel(chan);
int ret = 0;
if (dma->d_ops->residue)
- ret = dma->d_ops->residue(channel, dma);
+ ret = dma->d_ops->residue(chan, dma);
return ret;
}
EXPORT_SYMBOL(get_dma_residue);
-
-static int __init init_dma(void)
-{
- arch_dma_init(dma_chan);
- return 0;
-}
-
-core_initcall(init_dma);
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 85040cfeb5e..d662a2f1fd8 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -20,6 +20,7 @@
#include <asm/vfpmacros.h>
#include <mach/entry-macro.S>
#include <asm/thread_notify.h>
+#include <asm/unwind.h>
#include "entry-header.S"
@@ -123,6 +124,8 @@ ENDPROC(__und_invalid)
#endif
.macro svc_entry, stack_hole=0
+ UNWIND(.fnstart )
+ UNWIND(.save {r0 - pc} )
sub sp, sp, #(S_FRAME_SIZE + \stack_hole)
SPFIX( tst sp, #4 )
SPFIX( bicne sp, sp, #4 )
@@ -196,6 +199,7 @@ __dabt_svc:
ldr r0, [sp, #S_PSR]
msr spsr_cxsf, r0
ldmia sp, {r0 - pc}^ @ load r0 - pc, cpsr
+ UNWIND(.fnend )
ENDPROC(__dabt_svc)
.align 5
@@ -228,6 +232,7 @@ __irq_svc:
bleq trace_hardirqs_on
#endif
ldmia sp, {r0 - pc}^ @ load r0 - pc, cpsr
+ UNWIND(.fnend )
ENDPROC(__irq_svc)
.ltorg
@@ -278,6 +283,7 @@ __und_svc:
ldr lr, [sp, #S_PSR] @ Get SVC cpsr
msr spsr_cxsf, lr
ldmia sp, {r0 - pc}^ @ Restore SVC registers
+ UNWIND(.fnend )
ENDPROC(__und_svc)
.align 5
@@ -320,6 +326,7 @@ __pabt_svc:
ldr r0, [sp, #S_PSR]
msr spsr_cxsf, r0
ldmia sp, {r0 - pc}^ @ load r0 - pc, cpsr
+ UNWIND(.fnend )
ENDPROC(__pabt_svc)
.align 5
@@ -343,6 +350,8 @@ ENDPROC(__pabt_svc)
#endif
.macro usr_entry
+ UNWIND(.fnstart )
+ UNWIND(.cantunwind ) @ don't unwind the user space
sub sp, sp, #S_FRAME_SIZE
stmib sp, {r1 - r12}
@@ -420,6 +429,7 @@ __dabt_usr:
mov r2, sp
adr lr, ret_from_exception
b do_DataAbort
+ UNWIND(.fnend )
ENDPROC(__dabt_usr)
.align 5
@@ -450,6 +460,7 @@ __irq_usr:
mov why, #0
b ret_to_user
+ UNWIND(.fnend )
ENDPROC(__irq_usr)
.ltorg
@@ -484,6 +495,7 @@ __und_usr:
#else
b __und_usr_unknown
#endif
+ UNWIND(.fnend )
ENDPROC(__und_usr)
@
@@ -671,14 +683,18 @@ __pabt_usr:
enable_irq @ Enable interrupts
mov r1, sp @ regs
bl do_PrefetchAbort @ call abort handler
+ UNWIND(.fnend )
/* fall through */
/*
* This is the return code to user mode for abort handlers
*/
ENTRY(ret_from_exception)
+ UNWIND(.fnstart )
+ UNWIND(.cantunwind )
get_thread_info tsk
mov why, #0
b ret_to_user
+ UNWIND(.fnend )
ENDPROC(__pabt_usr)
ENDPROC(ret_from_exception)
@@ -688,6 +704,8 @@ ENDPROC(ret_from_exception)
* previous and next are guaranteed not to be the same.
*/
ENTRY(__switch_to)
+ UNWIND(.fnstart )
+ UNWIND(.cantunwind )
add ip, r1, #TI_CPU_SAVE
ldr r3, [r2, #TI_TP_VALUE]
stmia ip!, {r4 - sl, fp, sp, lr} @ Store most regs on stack
@@ -717,6 +735,7 @@ ENTRY(__switch_to)
bl atomic_notifier_call_chain
mov r0, r5
ldmia r4, {r4 - sl, fp, sp, pc} @ Load all regs saved previously
+ UNWIND(.fnend )
ENDPROC(__switch_to)
__INIT
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 159d0416f27..b55cb033180 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -11,6 +11,7 @@
#include <asm/unistd.h>
#include <asm/ftrace.h>
#include <mach/entry-macro.S>
+#include <asm/unwind.h>
#include "entry-header.S"
@@ -22,6 +23,8 @@
* stack.
*/
ret_fast_syscall:
+ UNWIND(.fnstart )
+ UNWIND(.cantunwind )
disable_irq @ disable interrupts
ldr r1, [tsk, #TI_FLAGS]
tst r1, #_TIF_WORK_MASK
@@ -38,6 +41,7 @@ ret_fast_syscall:
mov r0, r0
add sp, sp, #S_FRAME_SIZE - S_PC
movs pc, lr @ return & move spsr_svc into cpsr
+ UNWIND(.fnend )
/*
* Ok, we need to do extra processing, enter the slow path.
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 363db186cb9..6874c7dca75 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -76,7 +76,7 @@ int show_interrupts(struct seq_file *p, void *v)
seq_printf(p, "%3d: ", i);
for_each_present_cpu(cpu)
- seq_printf(p, "%10u ", kstat_cpu(cpu).irqs[i]);
+ seq_printf(p, "%10u ", kstat_irqs_cpu(i, cpu));
seq_printf(p, " %10s", irq_desc[i].chip->name ? : "-");
seq_printf(p, " %s", action->name);
for (action = action->next; action; action = action->next)
@@ -104,6 +104,11 @@ static struct irq_desc bad_irq_desc = {
.lock = __SPIN_LOCK_UNLOCKED(bad_irq_desc.lock),
};
+#ifdef CONFIG_CPUMASK_OFFSTACK
+/* We are not allocating bad_irq_desc.affinity or .pending_mask */
+#error "ARM architecture does not support CONFIG_CPUMASK_OFFSTACK."
+#endif
+
/*
* do_IRQ handles all hardware IRQ's. Decoded IRQs should not
* come via this function. Instead, they should provide their
@@ -161,7 +166,7 @@ void __init init_IRQ(void)
irq_desc[irq].status |= IRQ_NOREQUEST | IRQ_NOPROBE;
#ifdef CONFIG_SMP
- bad_irq_desc.affinity = CPU_MASK_ALL;
+ cpumask_setall(bad_irq_desc.affinity);
bad_irq_desc.cpu = smp_processor_id();
#endif
init_arch_irq();
@@ -191,15 +196,16 @@ void migrate_irqs(void)
struct irq_desc *desc = irq_desc + i;
if (desc->cpu == cpu) {
- unsigned int newcpu = any_online_cpu(desc->affinity);
-
- if (newcpu == NR_CPUS) {
+ unsigned int newcpu = cpumask_any_and(desc->affinity,
+ cpu_online_mask);
+ if (newcpu >= nr_cpu_ids) {
if (printk_ratelimit())
printk(KERN_INFO "IRQ%u no longer affine to CPU%u\n",
i, cpu);
- cpus_setall(desc->affinity);
- newcpu = any_online_cpu(desc->affinity);
+ cpumask_setall(desc->affinity);
+ newcpu = cpumask_any_and(desc->affinity,
+ cpu_online_mask);
}
route_irq(desc, i, newcpu);
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index dab48f27263..d1731e39b49 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -22,6 +22,7 @@
#include <asm/pgtable.h>
#include <asm/sections.h>
+#include <asm/unwind.h>
#ifdef CONFIG_XIP_KERNEL
/*
@@ -66,6 +67,24 @@ int module_frob_arch_sections(Elf_Ehdr *hdr,
char *secstrings,
struct module *mod)
{
+#ifdef CONFIG_ARM_UNWIND
+ Elf_Shdr *s, *sechdrs_end = sechdrs + hdr->e_shnum;
+
+ for (s = sechdrs; s < sechdrs_end; s++) {
+ if (strcmp(".ARM.exidx.init.text", secstrings + s->sh_name) == 0)
+ mod->arch.unw_sec_init = s;
+ else if (strcmp(".ARM.exidx.devinit.text", secstrings + s->sh_name) == 0)
+ mod->arch.unw_sec_devinit = s;
+ else if (strcmp(".ARM.exidx", secstrings + s->sh_name) == 0)
+ mod->arch.unw_sec_core = s;
+ else if (strcmp(".init.text", secstrings + s->sh_name) == 0)
+ mod->arch.sec_init_text = s;
+ else if (strcmp(".devinit.text", secstrings + s->sh_name) == 0)
+ mod->arch.sec_devinit_text = s;
+ else if (strcmp(".text", secstrings + s->sh_name) == 0)
+ mod->arch.sec_core_text = s;
+ }
+#endif
return 0;
}
@@ -104,6 +123,10 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
loc = dstsec->sh_addr + rel->r_offset;
switch (ELF32_R_TYPE(rel->r_info)) {
+ case R_ARM_NONE:
+ /* ignore */
+ break;
+
case R_ARM_ABS32:
*(u32 *)loc += sym->st_value;
break;
@@ -132,6 +155,20 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
*(u32 *)loc |= offset & 0x00ffffff;
break;
+ case R_ARM_V4BX:
+ /* Preserve Rm and the condition code. Alter
+ * other bits to re-code instruction as
+ * MOV PC,Rm.
+ */
+ *(u32 *)loc &= 0xf000000f;
+ *(u32 *)loc |= 0x01a0f000;
+ break;
+
+ case R_ARM_PREL31:
+ offset = *(u32 *)loc + sym->st_value - loc;
+ *(u32 *)loc = offset & 0x7fffffff;
+ break;
+
default:
printk(KERN_ERR "%s: unknown relocation: %u\n",
module->name, ELF32_R_TYPE(rel->r_info));
@@ -150,14 +187,50 @@ apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
return -ENOEXEC;
}
+#ifdef CONFIG_ARM_UNWIND
+static void register_unwind_tables(struct module *mod)
+{
+ if (mod->arch.unw_sec_init && mod->arch.sec_init_text)
+ mod->arch.unwind_init =
+ unwind_table_add(mod->arch.unw_sec_init->sh_addr,
+ mod->arch.unw_sec_init->sh_size,
+ mod->arch.sec_init_text->sh_addr,
+ mod->arch.sec_init_text->sh_size);
+ if (mod->arch.unw_sec_devinit && mod->arch.sec_devinit_text)
+ mod->arch.unwind_devinit =
+ unwind_table_add(mod->arch.unw_sec_devinit->sh_addr,
+ mod->arch.unw_sec_devinit->sh_size,
+ mod->arch.sec_devinit_text->sh_addr,
+ mod->arch.sec_devinit_text->sh_size);
+ if (mod->arch.unw_sec_core && mod->arch.sec_core_text)
+ mod->arch.unwind_core =
+ unwind_table_add(mod->arch.unw_sec_core->sh_addr,
+ mod->arch.unw_sec_core->sh_size,
+ mod->arch.sec_core_text->sh_addr,
+ mod->arch.sec_core_text->sh_size);
+}
+
+static void unregister_unwind_tables(struct module *mod)
+{
+ unwind_table_del(mod->arch.unwind_init);
+ unwind_table_del(mod->arch.unwind_devinit);
+ unwind_table_del(mod->arch.unwind_core);
+}
+#else
+static inline void register_unwind_tables(struct module *mod) { }
+static inline void unregister_unwind_tables(struct module *mod) { }
+#endif
+
int
module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
struct module *module)
{
+ register_unwind_tables(module);
return 0;
}
void
module_arch_cleanup(struct module *mod)
{
+ unregister_unwind_tables(mod);
}
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index d3ea6fa8952..c3265a2e7cd 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -34,6 +34,7 @@
#include <asm/processor.h>
#include <asm/system.h>
#include <asm/thread_notify.h>
+#include <asm/stacktrace.h>
#include <asm/mach/time.h>
static const char *processor_modes[] = {
@@ -82,7 +83,7 @@ static int __init hlt_setup(char *__unused)
__setup("nohlt", nohlt_setup);
__setup("hlt", hlt_setup);
-void arm_machine_restart(char mode)
+void arm_machine_restart(char mode, const char *cmd)
{
/*
* Clean and disable cache, and turn off interrupts
@@ -99,7 +100,7 @@ void arm_machine_restart(char mode)
/*
* Now call the architecture specific reboot code.
*/
- arch_reset(mode);
+ arch_reset(mode, cmd);
/*
* Whoops - the architecture was unable to reboot.
@@ -119,7 +120,7 @@ EXPORT_SYMBOL(pm_idle);
void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);
-void (*arm_pm_restart)(char str) = arm_machine_restart;
+void (*arm_pm_restart)(char str, const char *cmd) = arm_machine_restart;
EXPORT_SYMBOL_GPL(arm_pm_restart);
@@ -194,9 +195,9 @@ void machine_power_off(void)
pm_power_off();
}
-void machine_restart(char * __unused)
+void machine_restart(char *cmd)
{
- arm_pm_restart(reboot_mode);
+ arm_pm_restart(reboot_mode, cmd);
}
void __show_regs(struct pt_regs *regs)
@@ -300,7 +301,7 @@ void release_thread(struct task_struct *dead_task)
asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
int
-copy_thread(int nr, unsigned long clone_flags, unsigned long stack_start,
+copy_thread(unsigned long clone_flags, unsigned long stack_start,
unsigned long stk_sz, struct task_struct *p, struct pt_regs *regs)
{
struct thread_info *thread = task_thread_info(p);
@@ -372,23 +373,21 @@ EXPORT_SYMBOL(kernel_thread);
unsigned long get_wchan(struct task_struct *p)
{
- unsigned long fp, lr;
- unsigned long stack_start, stack_end;
+ struct stackframe frame;
int count = 0;
if (!p || p == current || p->state == TASK_RUNNING)
return 0;
- stack_start = (unsigned long)end_of_stack(p);
- stack_end = (unsigned long)task_stack_page(p) + THREAD_SIZE;
-
- fp = thread_saved_fp(p);
+ frame.fp = thread_saved_fp(p);
+ frame.sp = thread_saved_sp(p);
+ frame.lr = 0; /* recovered from the stack */
+ frame.pc = thread_saved_pc(p);
do {
- if (fp < stack_start || fp > stack_end)
+ int ret = unwind_frame(&frame);
+ if (ret < 0)
return 0;
- lr = ((unsigned long *)fp)[-1];
- if (!in_sched_functions(lr))
- return lr;
- fp = *(unsigned long *) (fp - 12);
+ if (!in_sched_functions(frame.pc))
+ return frame.pc;
} while (count ++ < 16);
return 0;
}
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index df653ea5925..89882a1d018 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -653,6 +653,54 @@ static int ptrace_setcrunchregs(struct task_struct *tsk, void __user *ufp)
}
#endif
+#ifdef CONFIG_VFP
+/*
+ * Get the child VFP state.
+ */
+static int ptrace_getvfpregs(struct task_struct *tsk, void __user *data)
+{
+ struct thread_info *thread = task_thread_info(tsk);
+ union vfp_state *vfp = &thread->vfpstate;
+ struct user_vfp __user *ufp = data;
+
+ vfp_sync_state(thread);
+
+ /* copy the floating point registers */
+ if (copy_to_user(&ufp->fpregs, &vfp->hard.fpregs,
+ sizeof(vfp->hard.fpregs)))
+ return -EFAULT;
+
+ /* copy the status and control register */
+ if (put_user(vfp->hard.fpscr, &ufp->fpscr))
+ return -EFAULT;
+
+ return 0;
+}
+
+/*
+ * Set the child VFP state.
+ */
+static int ptrace_setvfpregs(struct task_struct *tsk, void __user *data)
+{
+ struct thread_info *thread = task_thread_info(tsk);
+ union vfp_state *vfp = &thread->vfpstate;
+ struct user_vfp __user *ufp = data;
+
+ vfp_sync_state(thread);
+
+ /* copy the floating point registers */
+ if (copy_from_user(&vfp->hard.fpregs, &ufp->fpregs,
+ sizeof(vfp->hard.fpregs)))
+ return -EFAULT;
+
+ /* copy the status and control register */
+ if (get_user(vfp->hard.fpscr, &ufp->fpscr))
+ return -EFAULT;
+
+ return 0;
+}
+#endif
+
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
int ret;
@@ -775,6 +823,16 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
#endif
+#ifdef CONFIG_VFP
+ case PTRACE_GETVFPREGS:
+ ret = ptrace_getvfpregs(child, (void __user *)data);
+ break;
+
+ case PTRACE_SETVFPREGS:
+ ret = ptrace_setvfpregs(child, (void __user *)data);
+ break;
+#endif
+
default:
ret = ptrace_request(child, request, addr, data);
break;
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 68d6494c038..bc5e4128f9f 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -40,6 +40,7 @@
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#include <asm/traps.h>
+#include <asm/unwind.h>
#include "compat.h"
#include "atags.h"
@@ -685,6 +686,8 @@ void __init setup_arch(char **cmdline_p)
struct machine_desc *mdesc;
char *from = default_command_line;
+ unwind_init();
+
setup_processor();
mdesc = setup_machine(machine_arch_type);
machine_name = mdesc->name;
@@ -780,6 +783,8 @@ static const char *hwcap_str[] = {
"crunch",
"thumbee",
"neon",
+ "vfpv3",
+ "vfpv3d16",
NULL
};
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 55fa7ff96a3..7801aac3c04 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -93,6 +93,7 @@ int __cpuinit __cpu_up(unsigned int cpu)
pmd = pmd_offset(pgd + pgd_index(PHYS_OFFSET), PHYS_OFFSET);
*pmd = __pmd((PHYS_OFFSET & PGDIR_MASK) |
PMD_TYPE_SECT | PMD_SECT_AP_WRITE);