[PATCH 22/27] score: create kernel files signal.c sys_score.c

From: Chen Liqin
Date: Tue Jun 09 2009 - 01:43:17 EST


Signed-off-by: Chen Liqin <liqin.chen@xxxxxxxxxxxxx>
---
arch/score/kernel/signal.c | 355
+++++++++++++++++++++++++++++++++++++++++
arch/score/kernel/sys_score.c | 179 +++++++++++++++++++++
arch/score/kernel/time.c | 150 +++++++++++++++++
3 files changed, 684 insertions(+), 0 deletions(-)
create mode 100644 arch/score/kernel/signal.c
create mode 100644 arch/score/kernel/sys_score.c
create mode 100644 arch/score/kernel/time.c

diff --git a/arch/score/kernel/signal.c b/arch/score/kernel/signal.c
new file mode 100644
index 0000000..b4ed1b3
--- /dev/null
+++ b/arch/score/kernel/signal.c
@@ -0,0 +1,355 @@
+/*
+ * arch/score/kernel/signal.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@xxxxxxxxxxxxx>
+ * Lennox Wu <lennox.wu@xxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/unistd.h>
+#include <linux/uaccess.h>
+#include <asm-generic/ucontext.h>
+
+#include <asm/cacheflush.h>
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+struct rt_sigframe {
+ u32 rs_ass[4]; /* argument save space */
+ u32 rs_code[2]; /* signal trampoline */
+ struct siginfo rs_info;
+ struct ucontext rs_uc;
+};
+
+int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
+{
+ int err = 0;
+ unsigned long reg;
+
+ reg = regs->cp0_epc; err |= __put_user(reg, &sc->sc_pc);
+ err |= __put_user(regs->cp0_psr, &sc->sc_psr);
+ err |= __put_user(regs->cp0_condition, &sc->sc_condition);
+
+
+#define save_gp_reg(i) { \
+ reg = regs->regs[i]; \
+ err |= __put_user(reg, &sc->sc_regs[i]); \
+} while (0)
+ save_gp_reg(0); save_gp_reg(1); save_gp_reg(2);
+ save_gp_reg(3); save_gp_reg(4); save_gp_reg(5);
+ save_gp_reg(6); save_gp_reg(7); save_gp_reg(8);
+ save_gp_reg(9); save_gp_reg(10); save_gp_reg(11);
+ save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
+ save_gp_reg(15); save_gp_reg(16); save_gp_reg(17);
+ save_gp_reg(18); save_gp_reg(19); save_gp_reg(20);
+ save_gp_reg(21); save_gp_reg(22); save_gp_reg(23);
+ save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
+ save_gp_reg(27); save_gp_reg(28); save_gp_reg(29);
+#undef save_gp_reg
+
+ reg = regs->ceh; err |= __put_user(reg, &sc->sc_mdceh);
+ reg = regs->cel; err |= __put_user(reg, &sc->sc_mdcel);
+ err |= __put_user(regs->cp0_ecr, &sc->sc_ecr);
+ err |= __put_user(regs->cp0_ema, &sc->sc_ema);
+
+ return err;
+}
+
+int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user
*sc)
+{
+ int err = 0;
+ u32 reg;
+
+ err |= __get_user(regs->cp0_epc, &sc->sc_pc);
+ err |= __get_user(regs->cp0_condition, &sc->sc_condition);
+
+ err |= __get_user(reg, &sc->sc_mdceh);
+ regs->ceh = (int) reg;
+ err |= __get_user(reg, &sc->sc_mdcel);
+ regs->cel = (int) reg;
+
+ err |= __get_user(reg, &sc->sc_psr);
+ regs->cp0_psr = (int) reg;
+ err |= __get_user(reg, &sc->sc_ecr);
+ regs->cp0_ecr = (int) reg;
+ err |= __get_user(reg, &sc->sc_ema);
+ regs->cp0_ema = (int) reg;
+
+#define restore_gp_reg(i) do { \
+ err |= __get_user(reg, &sc->sc_regs[i]); \
+ regs->regs[i] = reg; \
+} while (0)
+ restore_gp_reg(0); restore_gp_reg(1); restore_gp_reg(2);
+ restore_gp_reg(3); restore_gp_reg(4); restore_gp_reg(5);
+ restore_gp_reg(6); restore_gp_reg(7); restore_gp_reg(8);
+ restore_gp_reg(9); restore_gp_reg(10); restore_gp_reg(11);
+ restore_gp_reg(12); restore_gp_reg(13); restore_gp_reg(14);
+ restore_gp_reg(15); restore_gp_reg(16); restore_gp_reg(17);
+ restore_gp_reg(18); restore_gp_reg(19); restore_gp_reg(20);
+ restore_gp_reg(21); restore_gp_reg(22); restore_gp_reg(23);
+ restore_gp_reg(24); restore_gp_reg(25); restore_gp_reg(26);
+ restore_gp_reg(27); restore_gp_reg(28); restore_gp_reg(29);
+#undef restore_gp_reg
+
+ return err;
+}
+
+/*
+ * Determine which stack to use..
+ */
+void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
+ size_t frame_size)
+{
+ unsigned long sp;
+
+ /* Default to using normal stack */
+ sp = regs->regs[0];
+ sp -= 32;
+
+ /* This is the X/Open sanctioned signal stack switching. */
+ if ((ka->sa.sa_flags & SA_ONSTACK) && (!on_sig_stack(sp)))
+ sp = current->sas_ss_sp + current->sas_ss_size;
+
+ return (void *)((sp - frame_size) & ~7);
+}
+
+asmlinkage int score_sigaltstack(struct pt_regs *regs)
+{
+ const stack_t *uss = (const stack_t *) regs->regs[4];
+ stack_t *uoss = (stack_t *) regs->regs[5];
+ unsigned long usp = regs->regs[0];
+
+ return do_sigaltstack(uss, uoss, usp);
+}
+
+asmlinkage void score_rt_sigreturn(struct pt_regs *regs)
+{
+ struct rt_sigframe __user *frame;
+ sigset_t set;
+ stack_t st;
+ int sig;
+
+ frame = (struct rt_sigframe __user *) regs->regs[0];
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+ if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set)))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(&current->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ sig = restore_sigcontext(regs, &frame->rs_uc.uc_mcontext);
+ if (sig < 0)
+ goto badframe;
+ else if (sig)
+ force_sig(sig, current);
+
+ if (__copy_from_user(&st, &frame->rs_uc.uc_stack, sizeof(st)))
+ goto badframe;
+
+ /* It is more difficult to avoid calling this function than to
+ call it and ignore errors. */
+ do_sigaltstack((stack_t __user *)&st, NULL, regs->regs[0]);
+
+ __asm__ __volatile__(
+ "mv\tr0, %0\n\t"
+ "la\tr8, syscall_exit\n\t"
+ "br\tr8\n\t"
+ : : "r" (regs) : "r8");
+
+badframe:
+ force_sig(SIGSEGV, current);
+}
+
+int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
+ int signr, sigset_t *set, siginfo_t *info)
+{
+ struct rt_sigframe *frame;
+ int err = 0;
+
+ frame = get_sigframe(ka, regs, sizeof(*frame));
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ goto give_sigsegv;
+
+ /*
+ * Set up the return code ...
+ *
+ * li v0, __NR_rt_sigreturn
+ * syscall
+ */
+ err |= __put_user(0x87788000 + __NR_rt_sigreturn*2,
+ frame->rs_code + 0);
+ err |= __put_user(0x80008002, frame->rs_code + 1);
+ flush_cache_sigtramp((unsigned long) frame->rs_code);
+
+ err |= copy_siginfo_to_user(&frame->rs_info, info);
+ err |= __put_user(0, &frame->rs_uc.uc_flags);
+ err |= __put_user(0, &frame->rs_uc.uc_link);
+ err |= __put_user((void *)current->sas_ss_sp,
+ &frame->rs_uc.uc_stack.ss_sp);
+ err |= __put_user(sas_ss_flags(regs->regs[0]),
+ &frame->rs_uc.uc_stack.ss_flags);
+ err |= __put_user(current->sas_ss_size,
+ &frame->rs_uc.uc_stack.ss_size);
+ err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
+ err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set,
sizeof(*set));
+
+ if (err)
+ goto give_sigsegv;
+
+ regs->regs[0] = (unsigned long) frame;
+ regs->regs[3] = (unsigned long) frame->rs_code;
+ regs->regs[4] = signr;
+ regs->regs[5] = (unsigned long) &frame->rs_info;
+ regs->regs[6] = (unsigned long) &frame->rs_uc;
+ regs->regs[29] = (unsigned long) ka->sa.sa_handler;
+ regs->cp0_epc = (unsigned long) ka->sa.sa_handler;
+
+ return 0;
+
+give_sigsegv:
+ if (signr == SIGSEGV)
+ ka->sa.sa_handler = SIG_DFL;
+ force_sig(SIGSEGV, current);
+ return -EFAULT;
+}
+
+int handle_signal(unsigned long sig, siginfo_t *info,
+ struct k_sigaction *ka, sigset_t *oldset, struct pt_regs *regs)
+{
+ int ret;
+
+ if (regs->is_syscall) {
+ switch (regs->regs[4]) {
+ case ERESTART_RESTARTBLOCK:
+ case ERESTARTNOHAND:
+ regs->regs[4] = EINTR;
+ break;
+ case ERESTARTSYS:
+ if (!(ka->sa.sa_flags & SA_RESTART)) {
+ regs->regs[4] = EINTR;
+ break;
+ }
+ case ERESTARTNOINTR:
+ regs->regs[4] = regs->orig_r4;
+ regs->regs[7] = regs->orig_r7;
+ regs->cp0_epc -= 8;
+ }
+
+ regs->is_syscall = 0;
+ }
+
+ /*
+ * Set up the stack frame
+ */
+ ret = setup_rt_frame(ka, regs, sig, oldset, info);
+
+ spin_lock_irq(&current->sighand->siglock);
+ sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
+ if (!(ka->sa.sa_flags & SA_NODEFER))
+ sigaddset(&current->blocked, sig);
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ return ret;
+}
+
+asmlinkage void do_signal(struct pt_regs *regs)
+{
+ struct k_sigaction ka;
+ sigset_t *oldset;
+ siginfo_t info;
+ int signr;
+
+ /*
+ * We want the common case to go fast, which is why we may in
certain
+ * cases get here from kernel mode. Just return without doing
anything
+ * if so.
+ */
+ if (!user_mode(regs))
+ return;
+
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else
+ oldset = &current->blocked;
+
+ signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+ if (signr > 0) {
+ /* Actually deliver the signal. */
+ if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
+ /*
+ * A signal was successfully delivered; the saved
+ * sigmask will have been stored in the signal
frame,
+ * and will be restored by sigreturn, so we can
simply
+ * clear the TIF_RESTORE_SIGMASK flag.
+ */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ }
+
+ return;
+ }
+
+ if (regs->is_syscall) {
+ if (regs->regs[4] == ERESTARTNOHAND ||
+ regs->regs[4] == ERESTARTSYS ||
+ regs->regs[4] == ERESTARTNOINTR) {
+ regs->regs[4] = regs->orig_r4;
+ regs->regs[7] = regs->orig_r7;
+ regs->cp0_epc -= 8;
+ }
+
+ if (regs->regs[4] == ERESTART_RESTARTBLOCK) {
+ regs->regs[27] = __NR_restart_syscall;
+ regs->regs[4] = regs->orig_r4;
+ regs->regs[7] = regs->orig_r7;
+ regs->cp0_epc -= 8;
+ }
+
+ regs->is_syscall = 0; /* Don't deal with this again. */
+ }
+
+ /*
+ * If there's no signal to deliver, we just put the saved sigmask
+ * back
+ */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+ }
+}
+
+/*
+ * notification of userspace execution resumption
+ * - triggered by the TIF_WORK_MASK flags
+ */
+asmlinkage void do_notify_resume(struct pt_regs *regs, void *unused,
+ __u32 thread_info_flags)
+{
+ /* deal with pending signal delivery */
+ if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+ do_signal(regs);
+}
diff --git a/arch/score/kernel/sys_score.c b/arch/score/kernel/sys_score.c
new file mode 100644
index 0000000..ed2bf67
--- /dev/null
+++ b/arch/score/kernel/sys_score.c
@@ -0,0 +1,179 @@
+/*
+ * arch/score/kernel/syscall.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@xxxxxxxxxxxxx>
+ * Lennox Wu <lennox.wu@xxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/mman.h>
+#include <linux/module.h>
+#include <linux/unistd.h>
+
+unsigned long shm_align_mask = PAGE_SIZE - 1;
+EXPORT_SYMBOL(shm_align_mask);
+
+asmlinkage unsigned long
+sys_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;
+
+ if (pgoff & (~PAGE_MASK >> 12))
+ return -EINVAL;
+
+ flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+ if (!(flags & MAP_ANONYMOUS)) {
+ file = fget(fd);
+ if (!file)
+ return error;
+ }
+
+ down_write(&current->mm->mmap_sem);
+ error = do_mmap_pgoff(file, addr, len, prot, flags,
+ pgoff >> (PAGE_SHIFT - 12));
+ up_write(&current->mm->mmap_sem);
+
+ if (file)
+ fput(file);
+
+ return error;
+}
+
+asmlinkage long sys_mmap(unsigned long addr, size_t len,
+ unsigned long prot, unsigned long flags,
+ unsigned long fd, off_t offset)
+{
+ int err = -EINVAL;
+
+ if (offset & ~PAGE_MASK) {
+ printk(KERN_INFO "no pagemask in mmap\r\n");
+ goto out;
+ }
+
+ err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+out:
+ return err;
+}
+
+asmlinkage long score_vfork(struct pt_regs *regs)
+{
+ return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->regs[0],
+ regs, 0, NULL, NULL);
+}
+
+/*
+ * Fork a new task - this creates a new program thread.
+ * This is called indirectly via a small wrapper
+ */
+asmlinkage int
+score_fork(struct pt_regs *regs)
+{
+ return do_fork(SIGCHLD, regs->regs[0], regs, 0, NULL, NULL);
+}
+
+/*
+ * Clone a task - this clones the calling program thread.
+ * This is called indirectly via a small wrapper
+ */
+asmlinkage int
+score_clone(struct pt_regs *regs)
+{
+ unsigned long clone_flags;
+ unsigned long newsp;
+ int __user *parent_tidptr, *child_tidptr;
+
+ clone_flags = regs->regs[4];
+ newsp = regs->regs[5];
+ if (!newsp)
+ newsp = regs->regs[0];
+ parent_tidptr = (int __user *)regs->regs[6];
+
+ child_tidptr = NULL;
+ if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
+ int __user *__user *usp = (int __user *__user
*)regs->regs[0];
+
+ if (get_user(child_tidptr, &usp[4]))
+ return -EFAULT;
+ }
+
+ return do_fork(clone_flags, newsp, regs, 0,
+ parent_tidptr, child_tidptr);
+}
+
+/*
+ * sys_execve() executes a new program.
+ * This is called indirectly via a small wrapper
+ */
+asmlinkage int score_execve(struct pt_regs *regs)
+{
+ int error;
+ char *filename;
+
+ filename = getname((char *) (long) regs->regs[4]);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename))
+ return error;
+
+ error = do_execve(filename, (char **) (long) regs->regs[5],
+ (char **) (long) regs->regs[6], regs);
+
+ putname(filename);
+ return error;
+}
+
+/*
+ * If we ever come here the user sp is bad. Zap the process right away.
+ * Due to the bad stack signaling wouldn't work.
+ */
+asmlinkage void bad_stack(void)
+{
+ do_exit(SIGSEGV);
+}
+
+/*
+ * Do a system call from kernel instead of calling sys_execve so we
+ * end up with proper pt_regs.
+ */
+int kernel_execve(const char *filename, char *const argv[], char *const
envp[])
+{
+ register unsigned long __r4 asm("r4") = (unsigned long) filename;
+ register unsigned long __r5 asm("r5") = (unsigned long) argv;
+ register unsigned long __r6 asm("r6") = (unsigned long) envp;
+ register unsigned long __r7 asm("r7");
+
+ __asm__ volatile (" \n"
+ "ldi r27, %5 \n"
+ "syscall \n"
+ "mv %0, r4 \n"
+ "mv %1, r7 \n"
+ : "=&r" (__r4), "=r" (__r7)
+ : "r" (__r4), "r" (__r5), "r" (__r6), "i" (__NR_execve)
+ : "r8", "r9", "r10", "r11", "r22", "r23", "r24", "r25",
+ "r26", "r27", "memory");
+
+ if (__r7 == 0)
+ return __r4;
+
+ return -__r4;
+}
diff --git a/arch/score/kernel/time.c b/arch/score/kernel/time.c
new file mode 100644
index 0000000..45029eb
--- /dev/null
+++ b/arch/score/kernel/time.c
@@ -0,0 +1,150 @@
+/*
+ * arch/score/kernel/time.c
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@xxxxxxxxxxxxx>
+ * Lennox Wu <lennox.wu@xxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+
+#include <asm/scoreregs.h>
+
+irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evdev = dev_id;
+
+ /* clear timer interrupt flag */
+ __raw_writel(1, (void *)P_TIMER0_CPP_REG);
+ evdev->event_handler(evdev);
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction timer_irq = {
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_TIMER,
+ .mask = CPU_MASK_NONE,
+ .name = "timer",
+};
+
+static int comparator_next_event(unsigned long delta,
+ struct clock_event_device *evdev)
+{
+ unsigned long flags;
+
+ raw_local_irq_save(flags);
+
+ __raw_writel((TMR_M_PERIODIC | TMR_IE_ENABLE), (void
*)P_TIMER0_CTRL);
+ __raw_writel(delta, (void *)P_TIMER0_PRELOAD);
+ __raw_writel(__raw_readl((void *)P_TIMER0_CTRL) | TMR_ENABLE,
+ (void *)P_TIMER0_CTRL);
+
+ raw_local_irq_restore(flags);
+
+ return 0;
+}
+
+static void comparator_mode(enum clock_event_mode mode,
+ struct clock_event_device *evdev)
+{
+ unsigned long flags;
+
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ raw_local_irq_save(flags);
+ __raw_writel((TMR_M_PERIODIC | TMR_IE_ENABLE),
+ (void *)P_TIMER0_CTRL);
+ __raw_writel(SYSTEM_CLOCK/100, (void *)P_TIMER0_PRELOAD);
+ __raw_writel(__raw_readl((void *)P_TIMER0_CTRL) |
TMR_ENABLE,
+ (void *)P_TIMER0_CTRL);
+ raw_local_irq_restore(flags);
+ break;
+ case CLOCK_EVT_MODE_ONESHOT:
+ case CLOCK_EVT_MODE_RESUME:
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ break;
+ default:
+ BUG();
+ }
+}
+
+static struct clock_event_device comparator = {
+ .name = "avr32_comparator",
+ .features = CLOCK_EVT_FEAT_PERIODIC |
CLOCK_EVT_FEAT_ONESHOT,
+ .shift = 16,
+ .set_next_event = comparator_next_event,
+ .set_mode = comparator_mode,
+};
+
+static u32 score_tick_cnt;
+
+static cycle_t score_read_clk(struct clocksource *cs)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ score_tick_cnt += SYSTEM_CLOCK/100;
+ local_irq_restore(flags);
+
+ return score_tick_cnt;
+}
+
+static struct clocksource score_clk = {
+ .name = "timer",
+ .rating = 250,
+ .read = score_read_clk,
+ .shift = 20,
+ .mask = CLOCKSOURCE_MASK(32),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+void __init time_init(void)
+{
+ xtime.tv_sec = mktime(2009, 1, 1, 0, 0, 0);
+ xtime.tv_nsec = 0;
+
+ set_normalized_timespec(&wall_to_monotonic, -xtime.tv_sec,
+ -xtime.tv_nsec);
+
+ /* disable timer, timer interrupt enable */
+ __raw_writel((TMR_M_PERIODIC | TMR_IE_ENABLE), (void
*)P_TIMER0_CTRL);
+ __raw_writel(SYSTEM_CLOCK/100, (void *)P_TIMER0_PRELOAD); /* 10ms
*/
+
+ /* start timer */
+ __raw_writel(__raw_readl((void *)P_TIMER0_CTRL) | TMR_ENABLE,
+ (void *)P_TIMER0_CTRL);
+
+ score_clk.mult = clocksource_hz2mult(SYSTEM_CLOCK,
score_clk.shift);
+ clocksource_register(&score_clk);
+
+ /* setup COMPARE clockevent */
+ comparator.mult = div_sc(SYSTEM_CLOCK, NSEC_PER_SEC,
comparator.shift);
+ comparator.max_delta_ns = clockevent_delta2ns((u32)~0,
&comparator);
+ comparator.min_delta_ns = clockevent_delta2ns(50, &comparator) +
1;
+ comparator.cpumask = cpumask_of(0);
+
+ timer_irq.dev_id = &comparator;
+ setup_irq(IRQ_TIMER , &timer_irq);
+
+ clockevents_register_device(&comparator);
+}
--
1.6.2

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