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-rw-r--r--include/asm-generic/atomic.h59
-rw-r--r--include/asm-generic/bitops/ext2-atomic-setbit.h11
-rw-r--r--include/asm-generic/bitops/ext2-atomic.h4
-rw-r--r--include/asm-generic/delay.h37
-rw-r--r--include/asm-generic/io.h9
-rw-r--r--include/asm-generic/iomap.h12
-rw-r--r--include/asm-generic/local.h2
-rw-r--r--include/asm-generic/local64.h2
-rw-r--r--include/asm-generic/system.h2
9 files changed, 120 insertions, 18 deletions
diff --git a/include/asm-generic/atomic.h b/include/asm-generic/atomic.h
index e994197f84b7..e37963c1df4d 100644
--- a/include/asm-generic/atomic.h
+++ b/include/asm-generic/atomic.h
@@ -1,5 +1,7 @@
/*
- * Generic C implementation of atomic counter operations
+ * Generic C implementation of atomic counter operations. Usable on
+ * UP systems only. Do not include in machine independent code.
+ *
* Originally implemented for MN10300.
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
@@ -14,7 +16,11 @@
#define __ASM_GENERIC_ATOMIC_H
#ifdef CONFIG_SMP
-#error not SMP safe
+/* Force people to define core atomics */
+# if !defined(atomic_add_return) || !defined(atomic_sub_return) || \
+ !defined(atomic_clear_mask) || !defined(atomic_set_mask)
+# error "SMP requires a little arch-specific magic"
+# endif
#endif
/*
@@ -32,7 +38,9 @@
*
* Atomically reads the value of @v.
*/
+#ifndef atomic_read
#define atomic_read(v) (*(volatile int *)&(v)->counter)
+#endif
/**
* atomic_set - set atomic variable
@@ -53,6 +61,7 @@
*
* Atomically adds @i to @v and returns the result
*/
+#ifndef atomic_add_return
static inline int atomic_add_return(int i, atomic_t *v)
{
unsigned long flags;
@@ -66,6 +75,7 @@ static inline int atomic_add_return(int i, atomic_t *v)
return temp;
}
+#endif
/**
* atomic_sub_return - subtract integer from atomic variable
@@ -74,6 +84,7 @@ static inline int atomic_add_return(int i, atomic_t *v)
*
* Atomically subtracts @i from @v and returns the result
*/
+#ifndef atomic_sub_return
static inline int atomic_sub_return(int i, atomic_t *v)
{
unsigned long flags;
@@ -87,6 +98,7 @@ static inline int atomic_sub_return(int i, atomic_t *v)
return temp;
}
+#endif
static inline int atomic_add_negative(int i, atomic_t *v)
{
@@ -117,8 +129,8 @@ static inline void atomic_dec(atomic_t *v)
#define atomic_inc_return(v) atomic_add_return(1, (v))
#define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0)
-#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
-#define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0)
+#define atomic_dec_and_test(v) (atomic_dec_return(v) == 0)
+#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
#define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v)))
#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))
@@ -129,26 +141,51 @@ static inline void atomic_dec(atomic_t *v)
#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
-static inline int atomic_add_unless(atomic_t *v, int a, int u)
+static inline int __atomic_add_unless(atomic_t *v, int a, int u)
{
int c, old;
c = atomic_read(v);
while (c != u && (old = atomic_cmpxchg(v, c, c + a)) != c)
c = old;
- return c != u;
+ return c;
}
-#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
-
-static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
+/**
+ * atomic_clear_mask - Atomically clear bits in atomic variable
+ * @mask: Mask of the bits to be cleared
+ * @v: pointer of type atomic_t
+ *
+ * Atomically clears the bits set in @mask from @v
+ */
+#ifndef atomic_clear_mask
+static inline void atomic_clear_mask(unsigned long mask, atomic_t *v)
{
unsigned long flags;
mask = ~mask;
raw_local_irq_save(flags); /* Don't trace it in a irqsoff handler */
- *addr &= mask;
+ v->counter &= mask;
raw_local_irq_restore(flags);
}
+#endif
+
+/**
+ * atomic_set_mask - Atomically set bits in atomic variable
+ * @mask: Mask of the bits to be set
+ * @v: pointer of type atomic_t
+ *
+ * Atomically sets the bits set in @mask in @v
+ */
+#ifndef atomic_set_mask
+static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
+{
+ unsigned long flags;
+
+ raw_local_irq_save(flags); /* Don't trace it in a irqsoff handler */
+ v->counter |= mask;
+ raw_local_irq_restore(flags);
+}
+#endif
/* Assume that atomic operations are already serializing */
#define smp_mb__before_atomic_dec() barrier()
@@ -156,7 +193,5 @@ static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
-#include <asm-generic/atomic-long.h>
-
#endif /* __KERNEL__ */
#endif /* __ASM_GENERIC_ATOMIC_H */
diff --git a/include/asm-generic/bitops/ext2-atomic-setbit.h b/include/asm-generic/bitops/ext2-atomic-setbit.h
new file mode 100644
index 000000000000..5a0997857b34
--- /dev/null
+++ b/include/asm-generic/bitops/ext2-atomic-setbit.h
@@ -0,0 +1,11 @@
+#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_
+#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_
+
+/*
+ * Atomic bitops based version of ext2 atomic bitops
+ */
+
+#define ext2_set_bit_atomic(l, nr, addr) test_and_set_bit_le(nr, addr)
+#define ext2_clear_bit_atomic(l, nr, addr) test_and_clear_bit_le(nr, addr)
+
+#endif /* _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_ */
diff --git a/include/asm-generic/bitops/ext2-atomic.h b/include/asm-generic/bitops/ext2-atomic.h
index ecf1c9d8a7cc..87f0f109d7f1 100644
--- a/include/asm-generic/bitops/ext2-atomic.h
+++ b/include/asm-generic/bitops/ext2-atomic.h
@@ -1,6 +1,10 @@
#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
+/*
+ * Spinlock based version of ext2 atomic bitops
+ */
+
#define ext2_set_bit_atomic(lock, nr, addr) \
({ \
int ret; \
diff --git a/include/asm-generic/delay.h b/include/asm-generic/delay.h
index 4586fec75ddb..0f79054ce7cd 100644
--- a/include/asm-generic/delay.h
+++ b/include/asm-generic/delay.h
@@ -1,9 +1,44 @@
#ifndef __ASM_GENERIC_DELAY_H
#define __ASM_GENERIC_DELAY_H
+/* Undefined functions to get compile-time errors */
+extern void __bad_udelay(void);
+extern void __bad_ndelay(void);
+
extern void __udelay(unsigned long usecs);
+extern void __ndelay(unsigned long nsecs);
+extern void __const_udelay(unsigned long xloops);
extern void __delay(unsigned long loops);
-#define udelay(n) __udelay(n)
+/*
+ * The weird n/20000 thing suppresses a "comparison is always false due to
+ * limited range of data type" warning with non-const 8-bit arguments.
+ */
+
+/* 0x10c7 is 2**32 / 1000000 (rounded up) */
+#define udelay(n) \
+ ({ \
+ if (__builtin_constant_p(n)) { \
+ if ((n) / 20000 >= 1) \
+ __bad_udelay(); \
+ else \
+ __const_udelay((n) * 0x10c7ul); \
+ } else { \
+ __udelay(n); \
+ } \
+ })
+
+/* 0x5 is 2**32 / 1000000000 (rounded up) */
+#define ndelay(n) \
+ ({ \
+ if (__builtin_constant_p(n)) { \
+ if ((n) / 20000 >= 1) \
+ __bad_ndelay(); \
+ else \
+ __const_udelay((n) * 5ul); \
+ } else { \
+ __ndelay(n); \
+ } \
+ })
#endif /* __ASM_GENERIC_DELAY_H */
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index e0ffa3ddb02a..912088773a69 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -307,7 +307,11 @@ static inline void *phys_to_virt(unsigned long address)
/*
* Change "struct page" to physical address.
+ *
+ * This implementation is for the no-MMU case only... if you have an MMU
+ * you'll need to provide your own definitions.
*/
+#ifndef CONFIG_MMU
static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
{
return (void __iomem*) (unsigned long)offset;
@@ -326,7 +330,9 @@ static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
static inline void iounmap(void *addr)
{
}
+#endif /* CONFIG_MMU */
+#ifdef CONFIG_HAS_IOPORT
#ifndef CONFIG_GENERIC_IOMAP
static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
{
@@ -340,9 +346,10 @@ static inline void ioport_unmap(void __iomem *p)
extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
extern void ioport_unmap(void __iomem *p);
#endif /* CONFIG_GENERIC_IOMAP */
+#endif /* CONFIG_HAS_IOPORT */
#define xlate_dev_kmem_ptr(p) p
-#define xlate_dev_mem_ptr(p) ((void *) (p))
+#define xlate_dev_mem_ptr(p) __va(p)
#ifndef virt_to_bus
static inline unsigned long virt_to_bus(volatile void *address)
diff --git a/include/asm-generic/iomap.h b/include/asm-generic/iomap.h
index 76b0cc5637f8..98dcd76ce836 100644
--- a/include/asm-generic/iomap.h
+++ b/include/asm-generic/iomap.h
@@ -56,17 +56,29 @@ extern void iowrite8_rep(void __iomem *port, const void *buf, unsigned long coun
extern void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count);
extern void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count);
+#ifdef CONFIG_HAS_IOPORT
/* Create a virtual mapping cookie for an IO port range */
extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
extern void ioport_unmap(void __iomem *);
+#endif
#ifndef ARCH_HAS_IOREMAP_WC
#define ioremap_wc ioremap_nocache
#endif
+#ifdef CONFIG_PCI
/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
struct pci_dev;
extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
+#else
+struct pci_dev;
+static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
+{
+ return NULL;
+}
+static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
+{ }
+#endif
#endif
diff --git a/include/asm-generic/local.h b/include/asm-generic/local.h
index c8a5d68541d7..9ceb03b4f466 100644
--- a/include/asm-generic/local.h
+++ b/include/asm-generic/local.h
@@ -2,7 +2,7 @@
#define _ASM_GENERIC_LOCAL_H
#include <linux/percpu.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
#include <asm/types.h>
/*
diff --git a/include/asm-generic/local64.h b/include/asm-generic/local64.h
index 02ac760c1a8b..5980002b8b7b 100644
--- a/include/asm-generic/local64.h
+++ b/include/asm-generic/local64.h
@@ -55,7 +55,7 @@ typedef struct {
#else /* BITS_PER_LONG != 64 */
-#include <asm/atomic.h>
+#include <linux/atomic.h>
/* Don't use typedef: don't want them to be mixed with atomic_t's. */
typedef struct {
diff --git a/include/asm-generic/system.h b/include/asm-generic/system.h
index 4b0b9cbbfae5..215efa74f5a2 100644
--- a/include/asm-generic/system.h
+++ b/include/asm-generic/system.h
@@ -14,7 +14,6 @@
#ifndef __ASM_GENERIC_SYSTEM_H
#define __ASM_GENERIC_SYSTEM_H
-#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#include <linux/types.h>
@@ -139,5 +138,4 @@ unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
#endif /* !__ASSEMBLY__ */
-#endif /* __KERNEL__ */
#endif /* __ASM_GENERIC_SYSTEM_H */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.