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
This commit is contained in:
Linus Torvalds
commit
442ee5a942
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@ -220,8 +220,9 @@ config NEED_MACH_MEMORY_H
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be avoided when possible.
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config PHYS_OFFSET
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hex "Physical address of main memory"
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hex "Physical address of main memory" if MMU
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depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
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default DRAM_BASE if !MMU
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help
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Please provide the physical address corresponding to the
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location of main memory in your system.
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@ -30,14 +30,15 @@ enum unwind_reason_code {
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};
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struct unwind_idx {
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unsigned long addr;
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unsigned long addr_offset;
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unsigned long insn;
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};
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struct unwind_table {
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struct list_head list;
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struct unwind_idx *start;
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struct unwind_idx *stop;
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const struct unwind_idx *start;
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const struct unwind_idx *origin;
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const struct unwind_idx *stop;
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unsigned long begin_addr;
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unsigned long end_addr;
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};
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@ -49,15 +50,6 @@ extern struct unwind_table *unwind_table_add(unsigned long start,
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extern void unwind_table_del(struct unwind_table *tab);
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extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk);
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#ifdef CONFIG_ARM_UNWIND
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extern int __init unwind_init(void);
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#else
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static inline int __init unwind_init(void)
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{
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return 0;
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}
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#endif
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#endif /* !__ASSEMBLY__ */
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#ifdef CONFIG_ARM_UNWIND
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@ -640,6 +640,9 @@ static struct platform_device_id armpmu_plat_device_ids[] = {
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static int __devinit armpmu_device_probe(struct platform_device *pdev)
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{
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if (!cpu_pmu)
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return -ENODEV;
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cpu_pmu->plat_device = pdev;
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return 0;
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}
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@ -895,8 +895,6 @@ void __init setup_arch(char **cmdline_p)
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{
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struct machine_desc *mdesc;
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unwind_init();
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setup_processor();
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mdesc = setup_machine_fdt(__atags_pointer);
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if (!mdesc)
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@ -904,6 +902,12 @@ void __init setup_arch(char **cmdline_p)
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machine_desc = mdesc;
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machine_name = mdesc->name;
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#ifdef CONFIG_ZONE_DMA
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if (mdesc->dma_zone_size) {
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extern unsigned long arm_dma_zone_size;
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arm_dma_zone_size = mdesc->dma_zone_size;
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}
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#endif
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if (mdesc->soft_reboot)
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reboot_setup("s");
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@ -934,12 +938,6 @@ void __init setup_arch(char **cmdline_p)
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tcm_init();
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#ifdef CONFIG_ZONE_DMA
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if (mdesc->dma_zone_size) {
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extern unsigned long arm_dma_zone_size;
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arm_dma_zone_size = mdesc->dma_zone_size;
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}
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#endif
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#ifdef CONFIG_MULTI_IRQ_HANDLER
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handle_arch_irq = mdesc->handle_irq;
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#endif
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@ -67,7 +67,7 @@ EXPORT_SYMBOL(__aeabi_unwind_cpp_pr2);
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struct unwind_ctrl_block {
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unsigned long vrs[16]; /* virtual register set */
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unsigned long *insn; /* pointer to the current instructions word */
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const unsigned long *insn; /* pointer to the current instructions word */
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int entries; /* number of entries left to interpret */
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int byte; /* current byte number in the instructions word */
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};
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@ -83,8 +83,9 @@ enum regs {
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PC = 15
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};
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extern struct unwind_idx __start_unwind_idx[];
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extern struct unwind_idx __stop_unwind_idx[];
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extern const struct unwind_idx __start_unwind_idx[];
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static const struct unwind_idx *__origin_unwind_idx;
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extern const struct unwind_idx __stop_unwind_idx[];
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static DEFINE_SPINLOCK(unwind_lock);
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static LIST_HEAD(unwind_tables);
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@ -98,45 +99,99 @@ static LIST_HEAD(unwind_tables);
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})
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/*
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* Binary search in the unwind index. The entries entries are
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* Binary search in the unwind index. The entries are
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* guaranteed to be sorted in ascending order by the linker.
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*
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* start = first entry
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* origin = first entry with positive offset (or stop if there is no such entry)
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* stop - 1 = last entry
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*/
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static struct unwind_idx *search_index(unsigned long addr,
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struct unwind_idx *first,
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struct unwind_idx *last)
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static const struct unwind_idx *search_index(unsigned long addr,
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const struct unwind_idx *start,
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const struct unwind_idx *origin,
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const struct unwind_idx *stop)
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{
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pr_debug("%s(%08lx, %p, %p)\n", __func__, addr, first, last);
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unsigned long addr_prel31;
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if (addr < first->addr) {
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pr_warning("unwind: Unknown symbol address %08lx\n", addr);
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return NULL;
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} else if (addr >= last->addr)
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return last;
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pr_debug("%s(%08lx, %p, %p, %p)\n",
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__func__, addr, start, origin, stop);
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while (first < last - 1) {
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struct unwind_idx *mid = first + ((last - first + 1) >> 1);
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/*
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* only search in the section with the matching sign. This way the
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* prel31 numbers can be compared as unsigned longs.
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*/
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if (addr < (unsigned long)start)
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/* negative offsets: [start; origin) */
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stop = origin;
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else
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/* positive offsets: [origin; stop) */
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start = origin;
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if (addr < mid->addr)
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last = mid;
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else
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first = mid;
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/* prel31 for address relavive to start */
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addr_prel31 = (addr - (unsigned long)start) & 0x7fffffff;
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while (start < stop - 1) {
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const struct unwind_idx *mid = start + ((stop - start) >> 1);
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/*
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* As addr_prel31 is relative to start an offset is needed to
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* make it relative to mid.
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*/
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if (addr_prel31 - ((unsigned long)mid - (unsigned long)start) <
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mid->addr_offset)
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stop = mid;
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else {
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/* keep addr_prel31 relative to start */
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addr_prel31 -= ((unsigned long)mid -
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(unsigned long)start);
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start = mid;
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}
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}
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return first;
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if (likely(start->addr_offset <= addr_prel31))
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return start;
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else {
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pr_warning("unwind: Unknown symbol address %08lx\n", addr);
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return NULL;
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}
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}
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static struct unwind_idx *unwind_find_idx(unsigned long addr)
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static const struct unwind_idx *unwind_find_origin(
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const struct unwind_idx *start, const struct unwind_idx *stop)
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{
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struct unwind_idx *idx = NULL;
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pr_debug("%s(%p, %p)\n", __func__, start, stop);
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while (start < stop - 1) {
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const struct unwind_idx *mid = start + ((stop - start) >> 1);
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if (mid->addr_offset >= 0x40000000)
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/* negative offset */
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start = mid;
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else
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/* positive offset */
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stop = mid;
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}
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pr_debug("%s -> %p\n", __func__, stop);
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return stop;
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}
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static const struct unwind_idx *unwind_find_idx(unsigned long addr)
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{
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const struct unwind_idx *idx = NULL;
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unsigned long flags;
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pr_debug("%s(%08lx)\n", __func__, addr);
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if (core_kernel_text(addr))
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if (core_kernel_text(addr)) {
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if (unlikely(!__origin_unwind_idx))
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__origin_unwind_idx =
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unwind_find_origin(__start_unwind_idx,
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__stop_unwind_idx);
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/* main unwind table */
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idx = search_index(addr, __start_unwind_idx,
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__stop_unwind_idx - 1);
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else {
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__origin_unwind_idx,
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__stop_unwind_idx);
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} else {
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/* module unwind tables */
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struct unwind_table *table;
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@ -145,7 +200,8 @@ static struct unwind_idx *unwind_find_idx(unsigned long addr)
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if (addr >= table->begin_addr &&
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addr < table->end_addr) {
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idx = search_index(addr, table->start,
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table->stop - 1);
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table->origin,
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table->stop);
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/* Move-to-front to exploit common traces */
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list_move(&table->list, &unwind_tables);
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break;
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@ -274,7 +330,7 @@ static int unwind_exec_insn(struct unwind_ctrl_block *ctrl)
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int unwind_frame(struct stackframe *frame)
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{
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unsigned long high, low;
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struct unwind_idx *idx;
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const struct unwind_idx *idx;
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struct unwind_ctrl_block ctrl;
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/* only go to a higher address on the stack */
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@ -399,7 +455,6 @@ struct unwind_table *unwind_table_add(unsigned long start, unsigned long size,
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unsigned long text_size)
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{
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unsigned long flags;
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struct unwind_idx *idx;
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struct unwind_table *tab = kmalloc(sizeof(*tab), GFP_KERNEL);
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pr_debug("%s(%08lx, %08lx, %08lx, %08lx)\n", __func__, start, size,
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@ -408,15 +463,12 @@ struct unwind_table *unwind_table_add(unsigned long start, unsigned long size,
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if (!tab)
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return tab;
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tab->start = (struct unwind_idx *)start;
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tab->stop = (struct unwind_idx *)(start + size);
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tab->start = (const struct unwind_idx *)start;
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tab->stop = (const struct unwind_idx *)(start + size);
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tab->origin = unwind_find_origin(tab->start, tab->stop);
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tab->begin_addr = text_addr;
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tab->end_addr = text_addr + text_size;
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/* Convert the symbol addresses to absolute values */
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for (idx = tab->start; idx < tab->stop; idx++)
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idx->addr = prel31_to_addr(&idx->addr);
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spin_lock_irqsave(&unwind_lock, flags);
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list_add_tail(&tab->list, &unwind_tables);
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spin_unlock_irqrestore(&unwind_lock, flags);
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@ -437,16 +489,3 @@ void unwind_table_del(struct unwind_table *tab)
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kfree(tab);
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}
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int __init unwind_init(void)
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{
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struct unwind_idx *idx;
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/* Convert the symbol addresses to absolute values */
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for (idx = __start_unwind_idx; idx < __stop_unwind_idx; idx++)
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idx->addr = prel31_to_addr(&idx->addr);
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pr_debug("unwind: ARM stack unwinding initialised\n");
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return 0;
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}
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