diff options
Diffstat (limited to 'arch')
106 files changed, 2092 insertions, 961 deletions
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 0f23009170a..6ab6b337a91 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -172,7 +172,7 @@ not_angel: adr r0, LC0 ARM( ldmia r0, {r1, r2, r3, r4, r5, r6, r11, ip, sp}) THUMB( ldmia r0, {r1, r2, r3, r4, r5, r6, r11, ip} ) - THUMB( ldr sp, [r0, #28] ) + THUMB( ldr sp, [r0, #32] ) subs r0, r0, r1 @ calculate the delta offset @ if delta is zero, we are diff --git a/arch/arm/include/asm/highmem.h b/arch/arm/include/asm/highmem.h index 7f36d00600b..feb988a7ec3 100644 --- a/arch/arm/include/asm/highmem.h +++ b/arch/arm/include/asm/highmem.h @@ -11,7 +11,11 @@ #define kmap_prot PAGE_KERNEL -#define flush_cache_kmaps() flush_cache_all() +#define flush_cache_kmaps() \ + do { \ + if (cache_is_vivt()) \ + flush_cache_all(); \ + } while (0) extern pte_t *pkmap_page_table; @@ -21,11 +25,20 @@ extern void *kmap_high(struct page *page); extern void *kmap_high_get(struct page *page); extern void kunmap_high(struct page *page); +extern void *kmap_high_l1_vipt(struct page *page, pte_t *saved_pte); +extern void kunmap_high_l1_vipt(struct page *page, pte_t saved_pte); + +/* + * The following functions are already defined by <linux/highmem.h> + * when CONFIG_HIGHMEM is not set. + */ +#ifdef CONFIG_HIGHMEM extern void *kmap(struct page *page); extern void kunmap(struct page *page); extern void *kmap_atomic(struct page *page, enum km_type type); extern void kunmap_atomic(void *kvaddr, enum km_type type); extern void *kmap_atomic_pfn(unsigned long pfn, enum km_type type); extern struct page *kmap_atomic_to_page(const void *ptr); +#endif #endif diff --git a/arch/arm/include/asm/kmap_types.h b/arch/arm/include/asm/kmap_types.h index c019949a518..c4b2ea3fbe4 100644 --- a/arch/arm/include/asm/kmap_types.h +++ b/arch/arm/include/asm/kmap_types.h @@ -18,6 +18,7 @@ enum km_type { KM_IRQ1, KM_SOFTIRQ0, KM_SOFTIRQ1, + KM_L1_CACHE, KM_L2_CACHE, KM_TYPE_NR }; diff --git a/arch/arm/include/asm/ucontext.h b/arch/arm/include/asm/ucontext.h index bf65e9f4525..47f023aa849 100644 --- a/arch/arm/include/asm/ucontext.h +++ b/arch/arm/include/asm/ucontext.h @@ -59,23 +59,22 @@ struct iwmmxt_sigframe { #endif /* CONFIG_IWMMXT */ #ifdef CONFIG_VFP -#if __LINUX_ARM_ARCH__ < 6 -/* For ARM pre-v6, we use fstmiax and fldmiax. This adds one extra - * word after the registers, and a word of padding at the end for - * alignment. */ #define VFP_MAGIC 0x56465001 -#define VFP_STORAGE_SIZE 152 -#else -#define VFP_MAGIC 0x56465002 -#define VFP_STORAGE_SIZE 144 -#endif struct vfp_sigframe { unsigned long magic; unsigned long size; - union vfp_state storage; -}; + struct user_vfp ufp; + struct user_vfp_exc ufp_exc; +} __attribute__((__aligned__(8))); + +/* + * 8 byte for magic and size, 264 byte for ufp, 12 bytes for ufp_exc, + * 4 bytes padding. + */ +#define VFP_STORAGE_SIZE sizeof(struct vfp_sigframe) + #endif /* CONFIG_VFP */ /* @@ -91,7 +90,7 @@ struct aux_sigframe { #ifdef CONFIG_IWMMXT struct iwmmxt_sigframe iwmmxt; #endif -#if 0 && defined CONFIG_VFP /* Not yet saved. */ +#ifdef CONFIG_VFP struct vfp_sigframe vfp; #endif /* Something that isn't a valid magic number for any coprocessor. */ diff --git a/arch/arm/include/asm/user.h b/arch/arm/include/asm/user.h index df95e050f9d..05ac4b06876 100644 --- a/arch/arm/include/asm/user.h +++ b/arch/arm/include/asm/user.h @@ -83,11 +83,21 @@ struct user{ /* * User specific VFP registers. If only VFPv2 is present, registers 16 to 31 - * are ignored by the ptrace system call. + * are ignored by the ptrace system call and the signal handler. */ struct user_vfp { unsigned long long fpregs[32]; unsigned long fpscr; }; +/* + * VFP exception registers exposed to user space during signal delivery. + * Fields not relavant to the current VFP architecture are ignored. + */ +struct user_vfp_exc { + unsigned long fpexc; + unsigned long fpinst; + unsigned long fpinst2; +}; + #endif /* _ARM_USER_H */ diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c index e7714f367eb..907d5a620bc 100644 --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -18,6 +18,7 @@ #include <asm/cacheflush.h> #include <asm/ucontext.h> #include <asm/unistd.h> +#include <asm/vfp.h> #include "ptrace.h" #include "signal.h" @@ -175,6 +176,90 @@ static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame) #endif +#ifdef CONFIG_VFP + +static int preserve_vfp_context(struct vfp_sigframe __user *frame) +{ + struct thread_info *thread = current_thread_info(); + struct vfp_hard_struct *h = &thread->vfpstate.hard; + const unsigned long magic = VFP_MAGIC; + const unsigned long size = VFP_STORAGE_SIZE; + int err = 0; + + vfp_sync_hwstate(thread); + __put_user_error(magic, &frame->magic, err); + __put_user_error(size, &frame->size, err); + + /* + * Copy the floating point registers. There can be unused + * registers see asm/hwcap.h for details. + */ + err |= __copy_to_user(&frame->ufp.fpregs, &h->fpregs, + sizeof(h->fpregs)); + /* + * Copy the status and control register. + */ + __put_user_error(h->fpscr, &frame->ufp.fpscr, err); + + /* + * Copy the exception registers. + */ + __put_user_error(h->fpexc, &frame->ufp_exc.fpexc, err); + __put_user_error(h->fpinst, &frame->ufp_exc.fpinst, err); + __put_user_error(h->fpinst2, &frame->ufp_exc.fpinst2, err); + + return err ? -EFAULT : 0; +} + +static int restore_vfp_context(struct vfp_sigframe __user *frame) +{ + struct thread_info *thread = current_thread_info(); + struct vfp_hard_struct *h = &thread->vfpstate.hard; + unsigned long magic; + unsigned long size; + unsigned long fpexc; + int err = 0; + + __get_user_error(magic, &frame->magic, err); + __get_user_error(size, &frame->size, err); + + if (err) + return -EFAULT; + if (magic != VFP_MAGIC || size != VFP_STORAGE_SIZE) + return -EINVAL; + + /* + * Copy the floating point registers. There can be unused + * registers see asm/hwcap.h for details. + */ + err |= __copy_from_user(&h->fpregs, &frame->ufp.fpregs, + sizeof(h->fpregs)); + /* + * Copy the status and control register. + */ + __get_user_error(h->fpscr, &frame->ufp.fpscr, err); + + /* + * Sanitise and restore the exception registers. + */ + __get_user_error(fpexc, &frame->ufp_exc.fpexc, err); + /* Ensure the VFP is enabled. */ + fpexc |= FPEXC_EN; + /* Ensure FPINST2 is invalid and the exception flag is cleared. */ + fpexc &= ~(FPEXC_EX | FPEXC_FP2V); + h->fpexc = fpexc; + + __get_user_error(h->fpinst, &frame->ufp_exc.fpinst, err); + __get_user_error(h->fpinst2, &frame->ufp_exc.fpinst2, err); + + if (!err) + vfp_flush_hwstate(thread); + + return err ? -EFAULT : 0; +} + +#endif + /* * Do a signal return; undo the signal stack. These are aligned to 64-bit. */ @@ -233,8 +318,8 @@ static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf) err |= restore_iwmmxt_context(&aux->iwmmxt); #endif #ifdef CONFIG_VFP -// if (err == 0) -// err |= vfp_restore_state(&sf->aux.vfp); + if (err == 0) + err |= restore_vfp_context(&aux->vfp); #endif return err; @@ -348,8 +433,8 @@ setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set) err |= preserve_iwmmxt_context(&aux->iwmmxt); #endif #ifdef CONFIG_VFP -// if (err == 0) -// err |= vfp_save_state(&sf->aux.vfp); + if (err == 0) + err |= preserve_vfp_context(&aux->vfp); #endif __put_user_error(0, &aux->end_magic, err); diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile index 027dd570dcc..d4004557532 100644 --- a/arch/arm/mach-at91/Makefile +++ b/arch/arm/mach-at91/Makefile @@ -16,8 +16,8 @@ obj-$(CONFIG_ARCH_AT91SAM9261) += at91sam9261.o at91sam926x_time.o at91sam9261_d obj-$(CONFIG_ARCH_AT91SAM9G10) += at91sam9261.o at91sam926x_time.o at91sam9261_devices.o sam9_smc.o obj-$(CONFIG_ARCH_AT91SAM9263) += at91sam9263.o at91sam926x_time.o at91sam9263_devices.o sam9_smc.o |