+++ /dev/null
-/*
- * arch/ubicom32/include/asm/ldsr.h
- * Ubicom32 LDSR interface definitions.
- *
- * (C) Copyright 2009, Ubicom, Inc.
- *
- * This file is part of the Ubicom32 Linux Kernel Port.
- *
- * The Ubicom32 Linux Kernel Port 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.
- *
- * The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not,
- * see <http://www.gnu.org/licenses/>.
- *
- * Ubicom32 implementation derived from (with many thanks):
- * arch/m68knommu
- * arch/blackfin
- * arch/parisc
- */
-#ifndef _ASM_UBICOM32_LDSR_H
-#define _ASM_UBICOM32_LDSR_H
-
-#include <asm/ubicom32-common.h>
-#include <asm/types.h>
-#include <asm/thread.h>
-
-extern unsigned int ldsr_soft_irq_mask;
-
-/*
- * ldsr_local_irq_is_disabled()
- * Test if interrupts are disabled for this thread?
- */
-static inline int ldsr_local_irq_is_disabled(void)
-{
- int ret;
- thread_t self = thread_get_self();
- unsigned int mask = (1 << self);
-
- asm volatile (
- " and.4 %0, scratchpad1, %1 \n\t"
- : "=r" (ret)
- : "d" (mask)
- : "cc"
- );
-
- /*
- * We return a simple 1 == disabled, 0 == enabled
- * losing which tid this is for, because Linux
- * can restore interrupts on a different thread.
- */
- return ret >> self;
-}
-
-/*
- * ldsr_local_irq_save()
- * Get the current interrupt state and disable interrupts.
- */
-static inline unsigned int ldsr_local_irq_save(void)
-{
- int ret;
- thread_t self = thread_get_self();
- unsigned int mask = (1 << self);
-
- /*
- * Ensure the compiler can not optimize out the code
- * (volatile) and that it does not "cache" values around
- * the interrupt state change (memory). This ensures
- * that interrupt changes are treated as a critical
- * section.
- */
- asm volatile (
- " and.4 %0, scratchpad1, %1 \n\t"
- " or.4 scratchpad1, scratchpad1, %1 \n\t"
- : "=&r" (ret)
- : "d" (mask)
- : "cc", "memory"
- );
-
- /*
- * We return a simple 1 == disabled, 0 == enabled
- * losing which tid this is for, because Linux
- * can restore interrupts on a different thread.
- */
- return ret >> self;
-}
-
-/*
- * ldsr_local_irq_restore()
- * Restore this cpu's interrupt enable/disable state.
- *
- * Note: flags is either 0 or 1.
- */
-static inline void ldsr_local_irq_restore(unsigned int flags)
-{
- unsigned int temp;
- thread_t self = thread_get_self();
- unsigned int mask = (1 << self);
- flags = (flags << self);
-
- /*
- * Ensure the compiler can not optimize out the code
- * (volatile) and that it does not "cache" values around
- * the interrupt state change (memory). This ensures
- * that interrupt changes are treated as a critical
- * section.
- *
- * Atomic change to our bit in scratchpad1 without
- * causing any temporary glitch in the value and
- * without effecting other values. Also this uses
- * no branches so no penalties.
- */
- asm volatile (
- " xor.4 %0, scratchpad1, %1 \n\t"
- " and.4 %0, %2, %0 \n\t"
- " xor.4 scratchpad1, scratchpad1, %0 \n\t"
- " move.4 int_set0, %3 \n\t"
- : "=&d"(temp)
- : "d"(flags), "r"(mask), "r"(ldsr_soft_irq_mask)
- : "cc", "memory"
- );
-}
-
-/*
- * ldsr_local_irq_disable_interrupt()
- * Disable ints for this thread.
- */
-static inline void ldsr_local_irq_disable(void)
-{
- unsigned int mask = (1 << thread_get_self());
-
- /*
- * Ensure the compiler can not optimize out the code
- * (volatile) and that it does not "cache" values around
- * the interrupt state change (memory). This ensures
- * that interrupt changes are treated as a critical
- * section.
- */
- asm volatile (
- " or.4 scratchpad1, scratchpad1, %0 \n\t"
- :
- : "d" (mask)
- : "cc", "memory"
- );
-}
-
-/*
- * ldsr_local_irq_enable_interrupt
- * Enable ints for this thread.
- */
-static inline void ldsr_local_irq_enable(void)
-{
- unsigned int mask = (1 << thread_get_self());
-
- /*
- * Ensure the compiler can not optimize out the code
- * (volatile) and that it does not "cache" values around
- * the interrupt state change (memory). This ensures
- * that interrupt changes are treated as a critical
- * section.
- */
- asm volatile (
- " and.4 scratchpad1, scratchpad1, %0 \n\t"
- " move.4 int_set0, %1 \n\t"
- :
- : "d" (~mask), "r" (ldsr_soft_irq_mask)
- : "cc", "memory"
- );
-}
-
-extern void ldsr_init(void);
-extern void ldsr_set_trap_irq(unsigned int irq);
-extern void ldsr_mask_vector(unsigned int vector);
-extern void ldsr_unmask_vector(unsigned int vector);
-extern void ldsr_enable_vector(unsigned int vector);
-extern void ldsr_disable_vector(unsigned int vector);
-extern thread_t ldsr_get_threadid(void);
-
-#endif /* _ASM_UBICOM32_LDSR_H */
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