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Blackfin arch: SMP supporting patchset: Blackfin header files and machine common code

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Blackfin dual core BF561 processor can support SMP like features.
https://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:smp-like

In this patch, we provide SMP extend to Blackfin header files
and machine common code

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Graf Yang
2009-01-07 23:14:39 +08:00
committed by Bryan Wu
parent c51b4488cd
commit 6b3087c64a
25 changed files with 1454 additions and 211 deletions
Download Patch File Download Diff File Expand all files Collapse all files

116
arch/blackfin/include/asm/system.h
View File

@ -37,20 +37,16 @@
#include <linux/linkage.h>
#include <linux/compiler.h>
#include <mach/anomaly.h>
#include <asm/pda.h>
#include <asm/processor.h>
/* Forward decl needed due to cdef inter dependencies */
static inline uint32_t __pure bfin_dspid(void);
#define blackfin_core_id() (bfin_dspid() & 0xff)
/*
* Interrupt configuring macros.
*/
extern unsigned long irq_flags;
#define local_irq_enable() \
__asm__ __volatile__( \
"sti %0;" \
: \
: "d" (irq_flags) \
)
#define local_irq_disable() \
do { \
int __tmp_dummy; \
@ -66,6 +62,18 @@ extern unsigned long irq_flags;
# define NOP_PAD_ANOMALY_05000244
#endif
#ifdef CONFIG_SMP
# define irq_flags cpu_pda[blackfin_core_id()].imask
#else
extern unsigned long irq_flags;
#endif
#define local_irq_enable() \
__asm__ __volatile__( \
"sti %0;" \
: \
: "d" (irq_flags) \
)
#define idle_with_irq_disabled() \
__asm__ __volatile__( \
NOP_PAD_ANOMALY_05000244 \
@ -129,22 +137,85 @@ extern unsigned long irq_flags;
#define rmb() asm volatile ("" : : :"memory")
#define wmb() asm volatile ("" : : :"memory")
#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
#define read_barrier_depends() do { } while(0)
#ifdef CONFIG_SMP
#define smp_mb() mb()
#define smp_rmb() rmb()
#define smp_wmb() wmb()
#define smp_read_barrier_depends() read_barrier_depends()
asmlinkage unsigned long __raw_xchg_1_asm(volatile void *ptr, unsigned long value);
asmlinkage unsigned long __raw_xchg_2_asm(volatile void *ptr, unsigned long value);
asmlinkage unsigned long __raw_xchg_4_asm(volatile void *ptr, unsigned long value);
asmlinkage unsigned long __raw_cmpxchg_1_asm(volatile void *ptr,
unsigned long new, unsigned long old);
asmlinkage unsigned long __raw_cmpxchg_2_asm(volatile void *ptr,
unsigned long new, unsigned long old);
asmlinkage unsigned long __raw_cmpxchg_4_asm(volatile void *ptr,
unsigned long new, unsigned long old);
#ifdef __ARCH_SYNC_CORE_DCACHE
# define smp_mb() do { barrier(); smp_check_barrier(); smp_mark_barrier(); } while (0)
# define smp_rmb() do { barrier(); smp_check_barrier(); } while (0)
# define smp_wmb() do { barrier(); smp_mark_barrier(); } while (0)
#else
# define smp_mb() barrier()
# define smp_rmb() barrier()
# define smp_wmb() barrier()
#endif
static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
int size)
{
unsigned long tmp;
switch (size) {
case 1:
tmp = __raw_xchg_1_asm(ptr, x);
break;
case 2:
tmp = __raw_xchg_2_asm(ptr, x);
break;
case 4:
tmp = __raw_xchg_4_asm(ptr, x);
break;
}
return tmp;
}
/*
* Atomic compare and exchange. Compare OLD with MEM, if identical,
* store NEW in MEM. Return the initial value in MEM. Success is
* indicated by comparing RETURN with OLD.
*/
static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
unsigned long new, int size)
{
unsigned long tmp;
switch (size) {
case 1:
tmp = __raw_cmpxchg_1_asm(ptr, new, old);
break;
case 2:
tmp = __raw_cmpxchg_2_asm(ptr, new, old);
break;
case 4:
tmp = __raw_cmpxchg_4_asm(ptr, new, old);
break;
}
return tmp;
}
#define cmpxchg(ptr, o, n) \
((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o), \
(unsigned long)(n), sizeof(*(ptr))))
#define smp_read_barrier_depends() smp_check_barrier()
#else /* !CONFIG_SMP */
#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
#define smp_read_barrier_depends() do { } while(0)
#endif
#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
struct __xchg_dummy {
unsigned long a[100];
@ -194,9 +265,12 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
(unsigned long)(n), sizeof(*(ptr))))
#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
#ifndef CONFIG_SMP
#include <asm-generic/cmpxchg.h>
#endif
#endif /* !CONFIG_SMP */
#define xchg(ptr, x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
#define tas(ptr) ((void)xchg((ptr), 1))
#define prepare_to_switch() do { } while(0)
@ -218,4 +292,4 @@ do { \
(last) = resume (prev, next); \
} while (0)
#endif /* _BLACKFIN_SYSTEM_H */
#endif /* _BLACKFIN_SYSTEM_H */