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

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

arch/arm/Kconfig

+2 −1
Original line number Diff line number Diff line
@@ -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.

arch/arm/include/asm/unwind.h

+4 −12
Original line number Diff line number Diff line
@@ -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

arch/arm/kernel/perf_event.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

}

arch/arm/kernel/setup.c

+6 −8
Original line number Diff line number Diff line
@@ -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

arch/arm/kernel/unwind.c

+84 −45
Original line number Diff line number Diff line
@@ -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;



	while (start < stop - 1) {

		const struct unwind_idx *mid = start + ((stop - start) >> 1);



	if (addr < first->addr) {

		/*

		 * 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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