some of the u-boot frameworks like ubi-fs and eth_gadget
uses atomic_* api's. So add atomic api's for mips.
This makes ubi-fs on nand work with mips platform.
Signed-off-by: Govindraj Raja <govindraj.r...@imgtec.com>
---
arch/mips/include/asm/atomic.h | 90 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 90 insertions(+)
create mode 100644 arch/mips/include/asm/atomic.h
diff --git a/arch/mips/include/asm/atomic.h b/arch/mips/include/asm/atomic.h
new file mode 100644
index 0000000..163e7e2
--- /dev/null
+++ b/arch/mips/include/asm/atomic.h
@@ -0,0 +1,90 @@
+/*
+ * Based on: linux/arch/mips/include/asm/atomic.h
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __ASM_MIPS_ATOMIC_H
+#define __ASM_MIPS_ATOMIC_H
+
+typedef struct { volatile int counter; } atomic_t;
+
+#define ATOMIC_INIT(i) { (i) }
+
+#include <asm/system.h>
+
+#define atomic_read(v) ((v)->counter)
+#define atomic_set(v, i) (((v)->counter) = (i))
+
+static inline void atomic_add(int i, volatile atomic_t *v)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ v->counter += i;
+ local_irq_restore(flags);
+}
+
+static inline void atomic_sub(int i, volatile atomic_t *v)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ v->counter -= i;
+ local_irq_restore(flags);
+}
+
+static inline void atomic_inc(volatile atomic_t *v)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ v->counter += 1;
+ local_irq_restore(flags);
+}
+
+static inline void atomic_dec(volatile atomic_t *v)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ v->counter -= 1;
+ local_irq_restore(flags);
+}
+
+static inline int atomic_dec_and_test(volatile atomic_t *v)
+{
+ unsigned long flags;
+ int val;
+
+ local_irq_save(flags);
+ val = v->counter;
+ v->counter = val -= 1;
+ local_irq_restore(flags);
+
+ return val == 0;
+}
+
+static inline int atomic_add_negative(int i, volatile atomic_t *v)
+{
+ unsigned long flags;
+ int val;
+
+ local_irq_save(flags);
+ val = v->counter;
+ v->counter = val += i;
+ local_irq_restore(flags);
+
+ return val < 0;
+}
+
+static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ *addr &= ~mask;
+ local_irq_restore(flags);
+}
+
+#endif /* __ASM_MIPS_ATOMIC_H */
--
1.9.1
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