Commit 442ee5a9 authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'fixes' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm

* 'fixes' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm:
  ARM: 7204/1: arch/arm/kernel/setup.c: initialize arm_dma_zone_size earlier
  ARM: 7185/1: perf: don't assign platform_device on unsupported CPUs
  ARM: 7187/1: fix unwinding for XIP kernels
  ARM: 7186/1: fix Kconfig issue with PHYS_OFFSET and !MMU
parents 13c07b02 9811ccdf
......@@ -220,8 +220,9 @@ config NEED_MACH_MEMORY_H
be avoided when possible.
config PHYS_OFFSET
hex "Physical address of main memory"
hex "Physical address of main memory" if MMU
depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
default DRAM_BASE if !MMU
help
Please provide the physical address corresponding to the
location of main memory in your system.
......
......@@ -30,14 +30,15 @@ enum unwind_reason_code {
};
struct unwind_idx {
unsigned long addr;
unsigned long addr_offset;
unsigned long insn;
};
struct unwind_table {
struct list_head list;
struct unwind_idx *start;
struct unwind_idx *stop;
const struct unwind_idx *start;
const struct unwind_idx *origin;
const struct unwind_idx *stop;
unsigned long begin_addr;
unsigned long end_addr;
};
......@@ -49,15 +50,6 @@ extern struct unwind_table *unwind_table_add(unsigned long start,
extern void unwind_table_del(struct unwind_table *tab);
extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk);
#ifdef CONFIG_ARM_UNWIND
extern int __init unwind_init(void);
#else
static inline int __init unwind_init(void)
{
return 0;
}
#endif
#endif /* !__ASSEMBLY__ */
#ifdef CONFIG_ARM_UNWIND
......
......@@ -640,6 +640,9 @@ static struct platform_device_id armpmu_plat_device_ids[] = {
static int __devinit armpmu_device_probe(struct platform_device *pdev)
{
if (!cpu_pmu)
return -ENODEV;
cpu_pmu->plat_device = pdev;
return 0;
}
......
......@@ -895,8 +895,6 @@ void __init setup_arch(char **cmdline_p)
{
struct machine_desc *mdesc;
unwind_init();
setup_processor();
mdesc = setup_machine_fdt(__atags_pointer);
if (!mdesc)
......@@ -904,6 +902,12 @@ void __init setup_arch(char **cmdline_p)
machine_desc = mdesc;
machine_name = mdesc->name;
#ifdef CONFIG_ZONE_DMA
if (mdesc->dma_zone_size) {
extern unsigned long arm_dma_zone_size;
arm_dma_zone_size = mdesc->dma_zone_size;
}
#endif
if (mdesc->soft_reboot)
reboot_setup("s");
......@@ -934,12 +938,6 @@ void __init setup_arch(char **cmdline_p)
tcm_init();
#ifdef CONFIG_ZONE_DMA
if (mdesc->dma_zone_size) {
extern unsigned long arm_dma_zone_size;
arm_dma_zone_size = mdesc->dma_zone_size;
}
#endif
#ifdef CONFIG_MULTI_IRQ_HANDLER
handle_arch_irq = mdesc->handle_irq;
#endif
......
......@@ -67,7 +67,7 @@ EXPORT_SYMBOL(__aeabi_unwind_cpp_pr2);
struct unwind_ctrl_block {
unsigned long vrs[16]; /* virtual register set */
unsigned long *insn; /* pointer to the current instructions word */
const unsigned long *insn; /* pointer to the current instructions word */
int entries; /* number of entries left to interpret */
int byte; /* current byte number in the instructions word */
};
......@@ -83,8 +83,9 @@ enum regs {
PC = 15
};
extern struct unwind_idx __start_unwind_idx[];
extern struct unwind_idx __stop_unwind_idx[];
extern const struct unwind_idx __start_unwind_idx[];
static const struct unwind_idx *__origin_unwind_idx;
extern const struct unwind_idx __stop_unwind_idx[];
static DEFINE_SPINLOCK(unwind_lock);
static LIST_HEAD(unwind_tables);
......@@ -98,45 +99,99 @@ static LIST_HEAD(unwind_tables);
})
/*
* Binary search in the unwind index. The entries entries are
* Binary search in the unwind index. The entries are
* guaranteed to be sorted in ascending order by the linker.
*
* start = first entry
* origin = first entry with positive offset (or stop if there is no such entry)
* stop - 1 = last entry
*/
static struct unwind_idx *search_index(unsigned long addr,
struct unwind_idx *first,
struct unwind_idx *last)
static const struct unwind_idx *search_index(unsigned long addr,
const struct unwind_idx *start,
const struct unwind_idx *origin,
const struct unwind_idx *stop)
{
pr_debug("%s(%08lx, %p, %p)\n", __func__, addr, first, last);
unsigned long addr_prel31;
pr_debug("%s(%08lx, %p, %p, %p)\n",
__func__, addr, start, origin, stop);
/*
* only search in the section with the matching sign. This way the
* prel31 numbers can be compared as unsigned longs.
*/
if (addr < (unsigned long)start)
/* negative offsets: [start; origin) */
stop = origin;
else
/* positive offsets: [origin; stop) */
start = origin;
/* prel31 for address relavive to start */
addr_prel31 = (addr - (unsigned long)start) & 0x7fffffff;
if (addr < first->addr) {
while (start < stop - 1) {
const struct unwind_idx *mid = start + ((stop - start) >> 1);
/*
* As addr_prel31 is relative to start an offset is needed to
* make it relative to mid.
*/
if (addr_prel31 - ((unsigned long)mid - (unsigned long)start) <
mid->addr_offset)
stop = mid;
else {
/* keep addr_prel31 relative to start */
addr_prel31 -= ((unsigned long)mid -
(unsigned long)start);
start = mid;
}
}
if (likely(start->addr_offset <= addr_prel31))
return start;
else {
pr_warning("unwind: Unknown symbol address %08lx\n", addr);
return NULL;
} else if (addr >= last->addr)
return last;
}
}
while (first < last - 1) {
struct unwind_idx *mid = first + ((last - first + 1) >> 1);
static const struct unwind_idx *unwind_find_origin(
const struct unwind_idx *start, const struct unwind_idx *stop)
{
pr_debug("%s(%p, %p)\n", __func__, start, stop);
while (start < stop - 1) {
const struct unwind_idx *mid = start + ((stop - start) >> 1);
if (addr < mid->addr)
last = mid;
if (mid->addr_offset >= 0x40000000)
/* negative offset */
start = mid;
else
first = mid;
/* positive offset */
stop = mid;
}
return first;
pr_debug("%s -> %p\n", __func__, stop);
return stop;
}
static struct unwind_idx *unwind_find_idx(unsigned long addr)
static const struct unwind_idx *unwind_find_idx(unsigned long addr)
{
struct unwind_idx *idx = NULL;
const struct unwind_idx *idx = NULL;
unsigned long flags;
pr_debug("%s(%08lx)\n", __func__, addr);
if (core_kernel_text(addr))
if (core_kernel_text(addr)) {
if (unlikely(!__origin_unwind_idx))
__origin_unwind_idx =
unwind_find_origin(__start_unwind_idx,
__stop_unwind_idx);
/* main unwind table */
idx = search_index(addr, __start_unwind_idx,
__stop_unwind_idx - 1);
else {
__origin_unwind_idx,
__stop_unwind_idx);
} else {
/* module unwind tables */
struct unwind_table *table;
......@@ -145,7 +200,8 @@ static struct unwind_idx *unwind_find_idx(unsigned long addr)
if (addr >= table->begin_addr &&
addr < table->end_addr) {
idx = search_index(addr, table->start,
table->stop - 1);
table->origin,
table->stop);
/* Move-to-front to exploit common traces */
list_move(&table->list, &unwind_tables);
break;
......@@ -274,7 +330,7 @@ static int unwind_exec_insn(struct unwind_ctrl_block *ctrl)
int unwind_frame(struct stackframe *frame)
{
unsigned long high, low;
struct unwind_idx *idx;
const struct unwind_idx *idx;
struct unwind_ctrl_block ctrl;
/* only go to a higher address on the stack */
......@@ -399,7 +455,6 @@ struct unwind_table *unwind_table_add(unsigned long start, unsigned long size,
unsigned long text_size)
{
unsigned long flags;
struct unwind_idx *idx;
struct unwind_table *tab = kmalloc(sizeof(*tab), GFP_KERNEL);
pr_debug("%s(%08lx, %08lx, %08lx, %08lx)\n", __func__, start, size,
......@@ -408,15 +463,12 @@ struct unwind_table *unwind_table_add(unsigned long start, unsigned long size,
if (!tab)
return tab;
tab->start = (struct unwind_idx *)start;
tab->stop = (struct unwind_idx *)(start + size);
tab->start = (const struct unwind_idx *)start;
tab->stop = (const struct unwind_idx *)(start + size);
tab->origin = unwind_find_origin(tab->start, tab->stop);
tab->begin_addr = text_addr;
tab->end_addr = text_addr + text_size;
/* Convert the symbol addresses to absolute values */
for (idx = tab->start; idx < tab->stop; idx++)
idx->addr = prel31_to_addr(&idx->addr);
spin_lock_irqsave(&unwind_lock, flags);
list_add_tail(&tab->list, &unwind_tables);
spin_unlock_irqrestore(&unwind_lock, flags);
......@@ -437,16 +489,3 @@ void unwind_table_del(struct unwind_table *tab)
kfree(tab);
}
int __init unwind_init(void)
{
struct unwind_idx *idx;
/* Convert the symbol addresses to absolute values */
for (idx = __start_unwind_idx; idx < __stop_unwind_idx; idx++)
idx->addr = prel31_to_addr(&idx->addr);
pr_debug("unwind: ARM stack unwinding initialised\n");
return 0;
}
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