diff options
Diffstat (limited to 'arch/cris/kernel')
| -rw-r--r-- | arch/cris/kernel/Makefile | 4 | ||||
| -rw-r--r-- | arch/cris/kernel/asm-offsets.c | 59 | ||||
| -rw-r--r-- | arch/cris/kernel/crisksyms.c | 8 | ||||
| -rw-r--r-- | arch/cris/kernel/irq.c | 53 | ||||
| -rw-r--r-- | arch/cris/kernel/module.c | 48 | ||||
| -rw-r--r-- | arch/cris/kernel/process.c | 98 | ||||
| -rw-r--r-- | arch/cris/kernel/profile.c | 40 | ||||
| -rw-r--r-- | arch/cris/kernel/ptrace.c | 7 | ||||
| -rw-r--r-- | arch/cris/kernel/semaphore.c | 129 | ||||
| -rw-r--r-- | arch/cris/kernel/setup.c | 5 | ||||
| -rw-r--r-- | arch/cris/kernel/sys_cris.c | 144 | ||||
| -rw-r--r-- | arch/cris/kernel/time.c | 158 | ||||
| -rw-r--r-- | arch/cris/kernel/traps.c | 10 | ||||
| -rw-r--r-- | arch/cris/kernel/vmlinux.lds.S | 132 |
14 files changed, 250 insertions, 645 deletions
diff --git a/arch/cris/kernel/Makefile b/arch/cris/kernel/Makefile index c8e8ea57098..b45640b3e60 100644 --- a/arch/cris/kernel/Makefile +++ b/arch/cris/kernel/Makefile @@ -3,10 +3,10 @@ # Makefile for the linux kernel. # +CPPFLAGS_vmlinux.lds := -DDRAM_VIRTUAL_BASE=0x$(CONFIG_ETRAX_DRAM_VIRTUAL_BASE) extra-y := vmlinux.lds -obj-y := process.o traps.o irq.o ptrace.o setup.o \ - time.o sys_cris.o semaphore.o +obj-y := process.o traps.o irq.o ptrace.o setup.o time.o sys_cris.o obj-$(CONFIG_MODULES) += crisksyms.o obj-$(CONFIG_MODULES) += module.o diff --git a/arch/cris/kernel/asm-offsets.c b/arch/cris/kernel/asm-offsets.c new file mode 100644 index 00000000000..a5fd88d816a --- /dev/null +++ b/arch/cris/kernel/asm-offsets.c @@ -0,0 +1,59 @@ +#include <linux/kbuild.h> +#include <linux/sched.h> +#include <asm/thread_info.h> + +/* + * Generate definitions needed by assembly language modules. + * This code generates raw asm output which is post-processed to extract + * and format the required data. + */ + +#if !defined(CONFIG_ETRAX_ARCH_V10) && !defined(CONFIG_ETRAX_ARCH_V32) +#error One of ARCH v10 and ARCH v32 must be true! +#endif + +int main(void) +{ +#define ENTRY(entry) DEFINE(PT_ ## entry, offsetof(struct pt_regs, entry)) + ENTRY(orig_r10); + ENTRY(r13); + ENTRY(r12); + ENTRY(r11); + ENTRY(r10); + ENTRY(r9); +#ifdef CONFIG_ETRAX_ARCH_V32 + ENTRY(acr); + ENTRY(srs); +#endif + ENTRY(mof); +#ifdef CONFIG_ETRAX_ARCH_V10 + ENTRY(dccr); +#else + ENTRY(ccs); +#endif + ENTRY(srp); + BLANK(); +#undef ENTRY +#define ENTRY(entry) DEFINE(TI_ ## entry, offsetof(struct thread_info, entry)) + ENTRY(task); + ENTRY(flags); + ENTRY(preempt_count); + BLANK(); +#undef ENTRY +#define ENTRY(entry) DEFINE(THREAD_ ## entry, offsetof(struct thread_struct, entry)) + ENTRY(ksp); + ENTRY(usp); +#ifdef CONFIG_ETRAX_ARCH_V10 + ENTRY(dccr); +#else + ENTRY(ccs); +#endif + BLANK(); +#undef ENTRY +#define ENTRY(entry) DEFINE(TASK_ ## entry, offsetof(struct task_struct, entry)) + ENTRY(pid); + BLANK(); + DEFINE(LCLONE_VM, CLONE_VM); + DEFINE(LCLONE_UNTRACED, CLONE_UNTRACED); + return 0; +} diff --git a/arch/cris/kernel/crisksyms.c b/arch/cris/kernel/crisksyms.c index 62f0e752915..5868cee20eb 100644 --- a/arch/cris/kernel/crisksyms.c +++ b/arch/cris/kernel/crisksyms.c @@ -9,7 +9,6 @@ #include <linux/string.h> #include <linux/tty.h> -#include <asm/semaphore.h> #include <asm/processor.h> #include <asm/uaccess.h> #include <asm/checksum.h> @@ -31,7 +30,6 @@ extern void __negdi2(void); extern void iounmap(volatile void * __iomem); /* Platform dependent support */ -EXPORT_SYMBOL(kernel_thread); EXPORT_SYMBOL(get_cmos_time); EXPORT_SYMBOL(loops_per_usec); @@ -49,12 +47,6 @@ EXPORT_SYMBOL(__negdi2); EXPORT_SYMBOL(__ioremap); EXPORT_SYMBOL(iounmap); -/* Semaphore functions */ -EXPORT_SYMBOL(__up); -EXPORT_SYMBOL(__down); -EXPORT_SYMBOL(__down_interruptible); -EXPORT_SYMBOL(__down_trylock); - /* Userspace access functions */ EXPORT_SYMBOL(__copy_user_zeroing); EXPORT_SYMBOL(__copy_user); diff --git a/arch/cris/kernel/irq.c b/arch/cris/kernel/irq.c index 2dfac8c7909..dd0be5de55d 100644 --- a/arch/cris/kernel/irq.c +++ b/arch/cris/kernel/irq.c @@ -29,7 +29,6 @@ #include <linux/ioport.h> #include <linux/interrupt.h> #include <linux/timex.h> -#include <linux/slab.h> #include <linux/random.h> #include <linux/init.h> #include <linux/seq_file.h> @@ -37,56 +36,10 @@ #include <linux/spinlock.h> #include <asm/io.h> - -void ack_bad_irq(unsigned int irq) -{ - printk("unexpected IRQ trap at vector %02x\n", irq); -} - -int show_interrupts(struct seq_file *p, void *v) -{ - int i = *(loff_t *) v, j; - struct irqaction * action; - unsigned long flags; - - if (i == 0) { - seq_printf(p, " "); - for_each_online_cpu(j) - seq_printf(p, "CPU%d ",j); - seq_putc(p, '\n'); - } - - if (i < NR_IRQS) { - spin_lock_irqsave(&irq_desc[i].lock, flags); - action = irq_desc[i].action; - if (!action) - goto skip; - seq_printf(p, "%3d: ",i); -#ifndef CONFIG_SMP - seq_printf(p, "%10u ", kstat_irqs(i)); -#else - for_each_online_cpu(j) - seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); -#endif - seq_printf(p, " %14s", irq_desc[i].chip->typename); - seq_printf(p, " %s", action->name); - - for (action=action->next; action; action = action->next) - seq_printf(p, ", %s", action->name); - - seq_putc(p, '\n'); -skip: - spin_unlock_irqrestore(&irq_desc[i].lock, flags); - } - return 0; -} - +#include <arch/system.h> /* called by the assembler IRQ entry functions defined in irq.h * to dispatch the interrupts to registered handlers - * interrupts are disabled upon entry - depending on if the - * interrupt was registered with IRQF_DISABLED or not, interrupts - * are re-enabled or not. */ asmlinkage void do_IRQ(int irq, struct pt_regs * regs) @@ -99,8 +52,8 @@ asmlinkage void do_IRQ(int irq, struct pt_regs * regs) printk("do_IRQ: stack overflow: %lX\n", sp); show_stack(NULL, (unsigned long *)sp); } - __do_IRQ(irq); - irq_exit(); + generic_handle_irq(irq); + irq_exit(); set_irq_regs(old_regs); } diff --git a/arch/cris/kernel/module.c b/arch/cris/kernel/module.c index a187833febc..51123f985eb 100644 --- a/arch/cris/kernel/module.c +++ b/arch/cris/kernel/module.c @@ -21,6 +21,7 @@ #include <linux/fs.h> #include <linux/string.h> #include <linux/kernel.h> +#include <linux/slab.h> #if 0 #define DEBUGP printk @@ -29,47 +30,17 @@ #endif #ifdef CONFIG_ETRAX_KMALLOCED_MODULES -#define MALLOC_MODULE(size) kmalloc(size, GFP_KERNEL) -#define FREE_MODULE(region) kfree(region) -#else -#define MALLOC_MODULE(size) vmalloc_exec(size) -#define FREE_MODULE(region) vfree(region) -#endif - void *module_alloc(unsigned long size) { - if (size == 0) - return NULL; - return MALLOC_MODULE(size); + return kmalloc(size, GFP_KERNEL); } - /* Free memory returned from module_alloc */ void module_free(struct module *mod, void *module_region) { - FREE_MODULE(module_region); - /* FIXME: If module_region == mod->init_region, trim exception - table entries. */ -} - -/* We don't need anything special. */ -int module_frob_arch_sections(Elf_Ehdr *hdr, - Elf_Shdr *sechdrs, - char *secstrings, - struct module *mod) -{ - return 0; -} - -int apply_relocate(Elf32_Shdr *sechdrs, - const char *strtab, - unsigned int symindex, - unsigned int relsec, - struct module *me) -{ - printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name); - return -ENOEXEC; + kfree(module_region); } +#endif int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab, @@ -109,14 +80,3 @@ int apply_relocate_add(Elf32_Shdr *sechdrs, return 0; } - -int module_finalize(const Elf_Ehdr *hdr, - const Elf_Shdr *sechdrs, - struct module *me) -{ - return 0; -} - -void module_arch_cleanup(struct module *mod) -{ -} diff --git a/arch/cris/kernel/process.c b/arch/cris/kernel/process.c index ef2db8fd102..b78498eb079 100644 --- a/arch/cris/kernel/process.c +++ b/arch/cris/kernel/process.c @@ -12,14 +12,12 @@ * This file handles the architecture-dependent parts of process handling.. */ -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/pgtable.h> #include <asm/uaccess.h> #include <asm/irq.h> -#include <asm/system.h> #include <linux/module.h> #include <linux/spinlock.h> -#include <linux/fs_struct.h> #include <linux/init_task.h> #include <linux/sched.h> #include <linux/fs.h> @@ -27,106 +25,18 @@ #include <linux/elfcore.h> #include <linux/mqueue.h> #include <linux/reboot.h> +#include <linux/rcupdate.h> //#define DEBUG -/* - * Initial task structure. Make this a per-architecture thing, - * because different architectures tend to have different - * alignment requirements and potentially different initial - * setup. - */ - -static struct fs_struct init_fs = INIT_FS; -static struct files_struct init_files = INIT_FILES; -static struct signal_struct init_signals = INIT_SIGNALS(init_signals); -static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); -struct mm_struct init_mm = INIT_MM(init_mm); - -EXPORT_SYMBOL(init_mm); - -/* - * Initial thread structure. - * - * We need to make sure that this is 8192-byte aligned due to the - * way process stacks are handled. This is done by having a special - * "init_task" linker map entry.. - */ -union thread_union init_thread_union - __attribute__((__section__(".data.init_task"))) = - { INIT_THREAD_INFO(init_task) }; - -/* - * Initial task structure. - * - * All other task structs will be allocated on slabs in fork.c - */ -struct task_struct init_task = INIT_TASK(init_task); - -EXPORT_SYMBOL(init_task); - -/* - * The hlt_counter, disable_hlt and enable_hlt is just here as a hook if - * there would ever be a halt sequence (for power save when idle) with - * some largish delay when halting or resuming *and* a driver that can't - * afford that delay. The hlt_counter would then be checked before - * executing the halt sequence, and the driver marks the unhaltable - * region by enable_hlt/disable_hlt. - */ - -int cris_hlt_counter=0; - -void disable_hlt(void) -{ - cris_hlt_counter++; -} - -EXPORT_SYMBOL(disable_hlt); - -void enable_hlt(void) -{ - cris_hlt_counter--; -} - -EXPORT_SYMBOL(enable_hlt); - -/* - * The following aren't currently used. - */ -void (*pm_idle)(void); - extern void default_idle(void); void (*pm_power_off)(void); EXPORT_SYMBOL(pm_power_off); -/* - * The idle thread. There's no useful work to be - * done, so just try to conserve power and have a - * low exit latency (ie sit in a loop waiting for - * somebody to say that they'd like to reschedule) - */ - -void cpu_idle (void) +void arch_cpu_idle(void) { - /* endless idle loop with no priority at all */ - while (1) { - while (!need_resched()) { - void (*idle)(void); - /* - * Mark this as an RCU critical section so that - * synchronize_kernel() in the unload path waits - * for our completion. - */ - idle = pm_idle; - if (!idle) - idle = default_idle; - idle(); - } - preempt_enable_no_resched(); - schedule(); - preempt_disable(); - } + default_idle(); } void hard_reset_now (void); diff --git a/arch/cris/kernel/profile.c b/arch/cris/kernel/profile.c index aad0a9e5991..cd9f15b92f8 100644 --- a/arch/cris/kernel/profile.c +++ b/arch/cris/kernel/profile.c @@ -2,18 +2,18 @@ #include <linux/errno.h> #include <linux/kernel.h> #include <linux/proc_fs.h> +#include <linux/slab.h> #include <linux/types.h> #include <asm/ptrace.h> #include <asm/uaccess.h> #define SAMPLE_BUFFER_SIZE 8192 -static char* sample_buffer; -static char* sample_buffer_pos; +static char *sample_buffer; +static char *sample_buffer_pos; static int prof_running = 0; -void -cris_profile_sample(struct pt_regs* regs) +void cris_profile_sample(struct pt_regs *regs) { if (!prof_running) return; @@ -23,7 +23,7 @@ cris_profile_sample(struct pt_regs* regs) else *(unsigned int*)sample_buffer_pos = 0; - *(unsigned int*)(sample_buffer_pos + 4) = instruction_pointer(regs); + *(unsigned int *)(sample_buffer_pos + 4) = instruction_pointer(regs); sample_buffer_pos += 8; if (sample_buffer_pos == sample_buffer + SAMPLE_BUFFER_SIZE) @@ -35,19 +35,16 @@ read_cris_profile(struct file *file, char __user *buf, size_t count, loff_t *ppos) { unsigned long p = *ppos; + ssize_t ret; - if (p > SAMPLE_BUFFER_SIZE) - return 0; + ret = simple_read_from_buffer(buf, count, ppos, sample_buffer, + SAMPLE_BUFFER_SIZE); + if (ret < 0) + return ret; - if (p + count > SAMPLE_BUFFER_SIZE) - count = SAMPLE_BUFFER_SIZE - p; - if (copy_to_user(buf, sample_buffer + p,count)) - return -EFAULT; + memset(sample_buffer + p, 0, ret); - memset(sample_buffer + p, 0, count); - *ppos += count; - - return count; + return ret; } static ssize_t @@ -56,15 +53,16 @@ write_cris_profile(struct file *file, const char __user *buf, { sample_buffer_pos = sample_buffer; memset(sample_buffer, 0, SAMPLE_BUFFER_SIZE); + return count < SAMPLE_BUFFER_SIZE ? count : SAMPLE_BUFFER_SIZE; } static const struct file_operations cris_proc_profile_operations = { .read = read_cris_profile, .write = write_cris_profile, + .llseek = default_llseek, }; -static int -__init init_cris_profile(void) +static int __init init_cris_profile(void) { struct proc_dir_entry *entry; @@ -75,14 +73,14 @@ __init init_cris_profile(void) sample_buffer_pos = sample_buffer; - entry = create_proc_entry("system_profile", S_IWUSR | S_IRUGO, NULL); + entry = proc_create("system_profile", S_IWUSR | S_IRUGO, NULL, + &cris_proc_profile_operations); if (entry) { - entry->proc_fops = &cris_proc_profile_operations; - entry->size = SAMPLE_BUFFER_SIZE; + proc_set_size(entry, SAMPLE_BUFFER_SIZE); } prof_running = 1; return 0; } - __initcall(init_cris_profile); + diff --git a/arch/cris/kernel/ptrace.c b/arch/cris/kernel/ptrace.c index b326023baab..58d44ee1a71 100644 --- a/arch/cris/kernel/ptrace.c +++ b/arch/cris/kernel/ptrace.c @@ -16,11 +16,11 @@ #include <linux/errno.h> #include <linux/ptrace.h> #include <linux/user.h> +#include <linux/tracehook.h> #include <asm/uaccess.h> #include <asm/page.h> #include <asm/pgtable.h> -#include <asm/system.h> #include <asm/processor.h> @@ -36,4 +36,9 @@ void do_notify_resume(int canrestart, struct pt_regs *regs, /* deal with pending signal delivery */ if (thread_info_flags & _TIF_SIGPENDING) do_signal(canrestart,regs); + + if (thread_info_flags & _TIF_NOTIFY_RESUME) { + clear_thread_flag(TIF_NOTIFY_RESUME); + tracehook_notify_resume(regs); + } } diff --git a/arch/cris/kernel/semaphore.c b/arch/cris/kernel/semaphore.c deleted file mode 100644 index f137a439041..00000000000 --- a/arch/cris/kernel/semaphore.c +++ /dev/null @@ -1,129 +0,0 @@ -/* - * Generic semaphore code. Buyer beware. Do your own - * specific changes in <asm/semaphore-helper.h> - */ - -#include <linux/sched.h> -#include <asm/semaphore-helper.h> - -/* - * Semaphores are implemented using a two-way counter: - * The "count" variable is decremented for each process - * that tries to sleep, while the "waking" variable is - * incremented when the "up()" code goes to wake up waiting - * processes. - * - * Notably, the inline "up()" and "down()" functions can - * efficiently test if they need to do any extra work (up - * needs to do something only if count was negative before - * the increment operation. - * - * waking_non_zero() (from asm/semaphore.h) must execute - * atomically. - * - * When __up() is called, the count was negative before - * incrementing it, and we need to wake up somebody. - * - * This routine adds one to the count of processes that need to - * wake up and exit. ALL waiting processes actually wake up but - * only the one that gets to the "waking" field first will gate - * through and acquire the semaphore. The others will go back - * to sleep. - * - * Note that these functions are only called when there is - * contention on the lock, and as such all this is the - * "non-critical" part of the whole semaphore business. The - * critical part is the inline stuff in <asm/semaphore.h> - * where we want to avoid any extra jumps and calls. - */ -void __up(struct semaphore *sem) -{ - wake_one_more(sem); - wake_up(&sem->wait); -} - -/* - * Perform the "down" function. Return zero for semaphore acquired, - * return negative for signalled out of the function. - * - * If called from __down, the return is ignored and the wait loop is - * not interruptible. This means that a task waiting on a semaphore - * using "down()" cannot be killed until someone does an "up()" on - * the semaphore. - * - * If called from __down_interruptible, the return value gets checked - * upon return. If the return value is negative then the task continues - * with the negative value in the return register (it can be tested by - * the caller). - * - * Either form may be used in conjunction with "up()". - * - */ - -#define DOWN_VAR \ - struct task_struct *tsk = current; \ - wait_queue_t wait; \ - init_waitqueue_entry(&wait, tsk); - -#define DOWN_HEAD(task_state) \ - \ - \ - tsk->state = (task_state); \ - add_wait_queue(&sem->wait, &wait); \ - \ - /* \ - * Ok, we're set up. sem->count is known to be less than zero \ - * so we must wait. \ - * \ - * We can let go the lock for purposes of waiting. \ - * We re-acquire it after awaking so as to protect \ - * all semaphore operations. \ - * \ - * If "up()" is called before we call waking_non_zero() then \ - * we will catch it right away. If it is called later then \ - * we will have to go through a wakeup cycle to catch it. \ - * \ - * Multiple waiters contend for the semaphore lock to see \ - * who gets to gate through and who has to wait some more. \ - */ \ - for (;;) { - -#define DOWN_TAIL(task_state) \ - tsk->state = (task_state); \ - } \ - tsk->state = TASK_RUNNING; \ - remove_wait_queue(&sem->wait, &wait); - -void __sched __down(struct semaphore * sem) -{ - DOWN_VAR - DOWN_HEAD(TASK_UNINTERRUPTIBLE) - if (waking_non_zero(sem)) - break; - schedule(); - DOWN_TAIL(TASK_UNINTERRUPTIBLE) -} - -int __sched __down_interruptible(struct semaphore * sem) -{ - int ret = 0; - DOWN_VAR - DOWN_HEAD(TASK_INTERRUPTIBLE) - - ret = waking_non_zero_interruptible(sem, tsk); - if (ret) - { - if (ret == 1) - /* ret != 0 only if we get interrupted -arca */ - ret = 0; - break; - } - schedule(); - DOWN_TAIL(TASK_INTERRUPTIBLE) - return ret; -} - -int __down_trylock(struct semaphore * sem) -{ - return waking_non_zero_trylock(sem); -} diff --git a/arch/cris/kernel/setup.c b/arch/cris/kernel/setup.c index 04d48dd91dd..905b70ea993 100644 --- a/arch/cris/kernel/setup.c +++ b/arch/cris/kernel/setup.c @@ -20,6 +20,7 @@ #include <linux/pfn.h> #include <linux/cpu.h> #include <asm/setup.h> +#include <arch/system.h> /* * Setup options @@ -164,9 +165,10 @@ void __init setup_arch(char **cmdline_p) strcpy(init_utsname()->machine, cris_machine_name); } +#ifdef CONFIG_PROC_FS static void *c_start(struct seq_file *m, loff_t *pos) { - return *pos < NR_CPUS ? (void *)(int)(*pos + 1): NULL; + return *pos < nr_cpu_ids ? (void *)(int)(*pos + 1) : NULL; } static void *c_next(struct seq_file *m, void *v, loff_t *pos) @@ -187,6 +189,7 @@ const struct seq_operations cpuinfo_op = { .stop = c_stop, .show = show_cpuinfo, }; +#endif /* CONFIG_PROC_FS */ static int __init topology_init(void) { diff --git a/arch/cris/kernel/sys_cris.c b/arch/cris/kernel/sys_cris.c index 8b9984197ed..7aa036ec78f 100644 --- a/arch/cris/kernel/sys_cris.c +++ b/arch/cris/kernel/sys_cris.c @@ -15,7 +15,6 @@ #include <linux/mm.h> #include <linux/fs.h> #include <linux/smp.h> -#include <linux/smp_lock.h> #include <linux/sem.h> #include <linux/msg.h> #include <linux/shm.h> @@ -27,149 +26,10 @@ #include <asm/uaccess.h> #include <asm/segment.h> -/* - * sys_pipe() is the normal C calling standard for creating - * a pipe. It's not the way Unix traditionally does this, though. - */ -asmlinkage int sys_pipe(unsigned long __user * fildes) -{ - int fd[2]; - int error; - - lock_kernel(); - error = do_pipe(fd); - unlock_kernel(); - if (!error) { - if (copy_to_user(fildes, fd, 2*sizeof(int))) - error = -EFAULT; - } - return error; -} - -/* common code for old and new mmaps */ -static inline long -do_mmap2(unsigned long addr, unsigned long len, unsigned long prot, - unsigned long flags, unsigned long fd, unsigned long pgoff) -{ - int error = -EBADF; - struct file * file = NULL; - - flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); - if (!(flags & MAP_ANONYMOUS)) { - file = fget(fd); - if (!file) - goto out; - } - - down_write(¤t->mm->mmap_sem); - error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); - up_write(¤t->mm->mmap_sem); - - if (file) - fput(file); -out: - return error; -} - -asmlinkage unsigned long old_mmap(unsigned long __user *args) -{ - unsigned long buffer[6]; - int err = -EFAULT; - - if (copy_from_user(&buffer, args, sizeof(buffer))) - goto out; - - err = -EINVAL; - if (buffer[5] & ~PAGE_MASK) /* verify that offset is on page boundary */ - goto out; - - err = do_mmap2(buffer[0], buffer[1], buffer[2], buffer[3], - buffer[4], buffer[5] >> PAGE_SHIFT); -out: - return err; -} - asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long fd, unsigned long pgoff) { - return do_mmap2(addr, len, prot, flags, fd, pgoff); -} - -/* - * sys_ipc() is the de-multiplexer for the SysV IPC calls.. - * - * This is really horribly ugly. (same as arch/i386) - */ - -asmlinkage int sys_ipc (uint call, int first, int second, - int third, void __user *ptr, long fifth) -{ - int version, ret; - - version = call >> 16; /* hack for backward compatibility */ - call &= 0xffff; - - switch (call) { - case SEMOP: - return sys_semtimedop (first, (struct sembuf __user *)ptr, second, NULL); - case SEMTIMEDOP: - return sys_semtimedop(first, (struct sembuf __user *)ptr, second, - (const struct timespec __user *)fifth); - - case SEMGET: - return sys_semget (first, second, third); - case SEMCTL: { - union semun fourth; - if (!ptr) - return -EINVAL; - if (get_user(fourth.__pad, (void * __user *) ptr)) - return -EFAULT; - return sys_semctl (first, second, third, fourth); - } - - case MSGSND: - return sys_msgsnd (first, (struct msgbuf __user *) ptr, - second, third); - case MSGRCV: - switch (version) { - case 0: { - struct ipc_kludge tmp; - if (!ptr) - return -EINVAL; - - if (copy_from_user(&tmp, - (struct ipc_kludge __user *) ptr, - sizeof (tmp))) - return -EFAULT; - return sys_msgrcv (first, tmp.msgp, second, - tmp.msgtyp, third); - } - default: - return sys_msgrcv (first, - (struct msgbuf __user *) ptr, - second, fifth, third); - } - case MSGGET: - return sys_msgget ((key_t) first, second); - case MSGCTL: - return sys_msgctl (first, second, (struct msqid_ds __user *) ptr); - - case SHMAT: { - ulong raddr; - ret = do_shmat (first, (char __user *) ptr, second, &raddr); - if (ret) - return ret; - return put_user (raddr, (ulong __user *) third); - } - case SHMDT: - return sys_shmdt ((char __user *)ptr); - case SHMGET: - return sys_shmget (first, second, third); - case SHMCTL: - return sys_shmctl (first, second, - (struct shmid_ds __user *) ptr); - default: - return -ENOSYS; - } + /* bug(?): 8Kb pages here */ + return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); } diff --git a/arch/cris/kernel/time.c b/arch/cris/kernel/time.c index ff4c6aa75de..fe6acdabbc8 100644 --- a/arch/cris/kernel/time.c +++ b/arch/cris/kernel/time.c @@ -21,7 +21,6 @@ * */ -#include <asm/rtc.h> #include <linux/errno.h> #include <linux/module.h> #include <linux/param.h> @@ -32,169 +31,38 @@ #include <linux/profile.h> #include <linux/sched.h> /* just for sched_clock() - funny that */ -int have_rtc; /* used to remember if we have an RTC or not */; + +#define D(x) #define TICK_SIZE tick extern unsigned long loops_per_jiffy; /* init/main.c */ unsigned long loops_per_usec; -extern unsigned long do_slow_gettimeoffset(void); -static unsigned long (*do_gettimeoffset)(void) = do_slow_gettimeoffset; - -/* - * This version of gettimeofday has near microsecond resolution. - * - * Note: Division is quite slow on CRIS and do_gettimeofday is called - * rather often. Maybe we should do some kind of approximation here - * (a naive approximation would be to divide by 1024). - */ -void do_gettimeofday(struct timeval *tv) +int set_rtc_mmss(unsigned long nowtime) { - unsigned long flags; - signed long usec, sec; - local_irq_save(flags); - usec = do_gettimeoffset(); - - /* - * If time_adjust is negative then NTP is slowing the clock - * so make sure not to go into next possible interval. - * Better to lose some accuracy than have time go backwards.. - */ - if (unlikely(time_adjust < 0) && usec > tickadj) - usec = tickadj; - - sec = xtime.tv_sec; - usec += xtime.tv_nsec / 1000; - local_irq_restore(flags); - - while (usec >= 1000000) { - usec -= 1000000; - sec++; - } - - tv->tv_sec = sec; - tv->tv_usec = usec; + D(printk(KERN_DEBUG "set_rtc_mmss(%lu)\n", nowtime)); + return 0; } -EXPORT_SYMBOL(do_gettimeofday); - -int do_settimeofday(struct timespec *tv) +/* grab the time from the RTC chip */ +unsigned long get_cmos_time(void) { - time_t wtm_sec, sec = tv->tv_sec; - long wtm_nsec, nsec = tv->tv_nsec; - - if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC) - return -EINVAL; - - write_seqlock_irq(&xtime_lock); - /* - * This is revolting. We need to set "xtime" correctly. However, the - * value in this location is the value at the most recent update of - * wall time. Discover what correction gettimeofday() would have - * made, and then undo it! - */ - nsec -= do_gettimeoffset() * NSEC_PER_USEC; - - wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec); - wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec); - - set_normalized_timespec(&xtime, sec, nsec); - set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec); - - ntp_clear(); - write_sequnlock_irq(&xtime_lock); - clock_was_set(); return 0; } -EXPORT_SYMBOL(do_settimeofday); - -/* - * BUG: This routine does not handle hour overflow properly; it just - * sets the minutes. Usually you'll only notice that after reboot! - */ - -int set_rtc_mmss(unsigned long nowtime) +int update_persistent_clock(struct timespec now) { - int retval = 0; - int real_seconds, real_minutes, cmos_minutes; - - printk(KERN_DEBUG "set_rtc_mmss(%lu)\n", nowtime); - - if(!have_rtc) - return 0; - - cmos_minutes = CMOS_READ(RTC_MINUTES); - BCD_TO_BIN(cmos_minutes); - - /* - * since we're only adjusting minutes and seconds, - * don't interfere with hour overflow. This avoids - * messing with unknown time zones but requires your - * RTC not to be off by more than 15 minutes - */ - real_seconds = nowtime % 60; - real_minutes = nowtime / 60; - if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1) - real_minutes += 30; /* correct for half hour time zone */ - real_minutes %= 60; - - if (abs(real_minutes - cmos_minutes) < 30) { - BIN_TO_BCD(real_seconds); - BIN_TO_BCD(real_minutes); - CMOS_WRITE(real_seconds,RTC_SECONDS); - CMOS_WRITE(real_minutes,RTC_MINUTES); - } else { - printk(KERN_WARNING - "set_rtc_mmss: can't update from %d to %d\n", - cmos_minutes, real_minutes); - retval = -1; - } - - return retval; + return set_rtc_mmss(now.tv_sec); } -/* grab the time from the RTC chip */ - -unsigned long -get_cmos_time(void) +void read_persistent_clock(struct timespec *ts) { - unsigned int year, mon, day, hour, min, sec; - - sec = CMOS_READ(RTC_SECONDS); - min = CMOS_READ(RTC_MINUTES); - hour = CMOS_READ(RTC_HOURS); - day = CMOS_READ(RTC_DAY_OF_MONTH); - mon = CMOS_READ(RTC_MONTH); - year = CMOS_READ(RTC_YEAR); - - BCD_TO_BIN(sec); - BCD_TO_BIN(min); - BCD_TO_BIN(hour); - BCD_TO_BIN(day); - BCD_TO_BIN(mon); - BCD_TO_BIN(year); - - if ((year += 1900) < 1970) - year += 100; - - return mktime(year, mon, day, hour, min, sec); + ts->tv_sec = 0; + ts->tv_nsec = 0; } -/* update xtime from the CMOS settings. used when /dev/rtc gets a SET_TIME. - * TODO: this doesn't reset the fancy NTP phase stuff as do_settimeofday does. - */ - -void -update_xtime_from_cmos(void) -{ - if(have_rtc) { - xtime.tv_sec = get_cmos_time(); - xtime.tv_nsec = 0; - } -} extern void cris_profile_sample(struct pt_regs* regs); @@ -213,7 +81,7 @@ cris_do_profile(struct pt_regs* regs) unsigned long long sched_clock(void) { - return (unsigned long long)jiffies * (1000000000 / HZ) + + return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ) + get_ns_in_jiffie(); } diff --git a/arch/cris/kernel/traps.c b/arch/cris/kernel/traps.c index 541efbf0937..0ffda73734f 100644 --- a/arch/cris/kernel/traps.c +++ b/arch/cris/kernel/traps.c @@ -17,6 +17,7 @@ #include <asm/pgtable.h> #include <asm/uaccess.h> +#include <arch/system.h> extern void arch_enable_nmi(void); extern void stop_watchdog(void); @@ -146,13 +147,6 @@ show_stack(void) #endif void -dump_stack(void) -{ - show_stack(NULL, NULL); -} -EXPORT_SYMBOL(dump_stack); - -void set_nmi_handler(void (*handler)(struct pt_regs *)) { nmi_handler = handler; @@ -183,7 +177,7 @@ __initcall(oops_nmi_register); /* * This gets called from entry.S when the watchdog has bitten. Show something - * similiar to an Oops dump, and if the kernel is configured to be a nice + * similar to an Oops dump, and if the kernel is configured to be a nice * doggy, then halt instead of reboot. */ void diff --git a/arch/cris/kernel/vmlinux.lds.S b/arch/cris/kernel/vmlinux.lds.S new file mode 100644 index 00000000000..a68b983dcea --- /dev/null +++ b/arch/cris/kernel/vmlinux.lds.S @@ -0,0 +1,132 @@ +/* ld script to make the Linux/CRIS kernel + * Authors: Bjorn Wesen (bjornw@axis.com) + * + * It is VERY DANGEROUS to fiddle around with the symbols in this + * script. It is for example quite vital that all generated sections + * that are used are actually named here, otherwise the linker will + * put them at the end, where the init stuff is which is FREED after + * the kernel has booted. + */ + +#include <asm-generic/vmlinux.lds.h> +#include <asm/page.h> + +#ifdef CONFIG_ETRAX_VMEM_SIZE +#define __CONFIG_ETRAX_VMEM_SIZE CONFIG_ETRAX_VMEM_SIZE +#else +#define __CONFIG_ETRAX_VMEM_SIZE 0 +#endif + + +jiffies = jiffies_64; +SECTIONS +{ + . = DRAM_VIRTUAL_BASE; + dram_start = .; +#ifdef CONFIG_ETRAX_ARCH_V10 + ibr_start = .; +#else + ebp_start = .; + /* The boot section is only necessary until the VCS top */ + /* level testbench includes both flash and DRAM. */ + .boot : { *(.boot) } +#endif + + /* see head.S and pages reserved at the start */ + . = DRAM_VIRTUAL_BASE + 0x4000; + + _text = .; /* Text and read-only data. */ + text_start = .; /* Lots of aliases. */ + _stext = .; + __stext = .; + .text : { + TEXT_TEXT + SCHED_TEXT + LOCK_TEXT + *(.fixup) + *(.text.__*) + } + + _etext = . ; /* End of text section. */ + __etext = .; + + EXCEPTION_TABLE(4) + + _sdata = .; + RODATA + + . = ALIGN (4); + ___data_start = . ; + __Sdata = . ; + .data : { /* Data */ + CACHELINE_ALIGNED_DATA(32) + READ_MOSTLY_DATA(32) + DATA_DATA + } + __edata = . ; /* End of data section. */ + _edata = . ; + + INIT_TASK_DATA_SECTION(PAGE_SIZE) + + . = ALIGN(PAGE_SIZE); /* Init code and data. */ + __init_begin = .; + INIT_TEXT_SECTION(PAGE_SIZE) + .init.data : { INIT_DATA } + .init.setup : { INIT_SETUP(16) } + .initcall.init : { + INIT_CALLS + } + + .con_initcall.init : { + CON_INITCALL + } + SECURITY_INIT + + /* .exit.text is discarded at runtime, not link time, + * to deal with references from __bug_table + */ + .exit.text : { + EXIT_TEXT + } + .exit.data : { + EXIT_DATA + } + +#ifdef CONFIG_ETRAX_ARCH_V10 +#ifdef CONFIG_BLK_DEV_INITRD + .init.ramfs : { + __initramfs_start = .; + *(.init.ramfs) + __initramfs_end = .; + } +#endif +#endif + __vmlinux_end = .; /* Last address of the physical file. */ +#ifdef CONFIG_ETRAX_ARCH_V32 + PERCPU_SECTION(32) + + .init.ramfs : { + INIT_RAM_FS + } +#endif + + /* + * We fill to the next page, so we can discard all init + * pages without needing to consider what payload might be + * appended to the kernel image. + */ + . = ALIGN(PAGE_SIZE); + + __init_end = .; + + __data_end = . ; /* Move to _edata ? */ + BSS_SECTION(1, 1, 1) + + . = ALIGN (0x20); + _end = .; + __end = .; + + dram_end = dram_start + (CONFIG_ETRAX_DRAM_SIZE - __CONFIG_ETRAX_VMEM_SIZE)*1024*1024; + + DISCARDS +} |