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>
*/
#define ATOMIC_INIT(i) { (i) }
-
-#define atomic_read(v) ((v)->counter)
#define atomic_set(v, i) (((v)->counter) = i)
-static __inline__ void atomic_add(int i, atomic_t * v)
+#ifdef CONFIG_SMP
+
+#define atomic_read(v) __raw_uncached_fetch_asm(&(v)->counter)
+
+asmlinkage int __raw_uncached_fetch_asm(const volatile int *ptr);
+
+asmlinkage int __raw_atomic_update_asm(volatile int *ptr, int value);
+
+asmlinkage int __raw_atomic_clear_asm(volatile int *ptr, int value);
+
+asmlinkage int __raw_atomic_set_asm(volatile int *ptr, int value);
+
+asmlinkage int __raw_atomic_xor_asm(volatile int *ptr, int value);
+
+asmlinkage int __raw_atomic_test_asm(const volatile int *ptr, int value);
+
+static inline void atomic_add(int i, atomic_t *v)
+{
+ __raw_atomic_update_asm(&v->counter, i);
+}
+
+static inline void atomic_sub(int i, atomic_t *v)
+{
+ __raw_atomic_update_asm(&v->counter, -i);
+}
+
+static inline int atomic_add_return(int i, atomic_t *v)
+{
+ return __raw_atomic_update_asm(&v->counter, i);
+}
+
+static inline int atomic_sub_return(int i, atomic_t *v)
+{
+ return __raw_atomic_update_asm(&v->counter, -i);
+}
+
+static inline void atomic_inc(volatile atomic_t *v)
+{
+ __raw_atomic_update_asm(&v->counter, 1);
+}
+
+static inline void atomic_dec(volatile atomic_t *v)
+{
+ __raw_atomic_update_asm(&v->counter, -1);
+}
+
+static inline void atomic_clear_mask(int mask, atomic_t *v)
+{
+ __raw_atomic_clear_asm(&v->counter, mask);
+}
+
+static inline void atomic_set_mask(int mask, atomic_t *v)
+{
+ __raw_atomic_set_asm(&v->counter, mask);
+}
+
+static inline int atomic_test_mask(int mask, atomic_t *v)
+{
+ return __raw_atomic_test_asm(&v->counter, mask);
+}
+
+/* Atomic operations are already serializing */
+#define smp_mb__before_atomic_dec() barrier()
+#define smp_mb__after_atomic_dec() barrier()
+#define smp_mb__before_atomic_inc() barrier()
+#define smp_mb__after_atomic_inc() barrier()
+
+#else /* !CONFIG_SMP */
+
+#define atomic_read(v) ((v)->counter)
+
+static inline void atomic_add(int i, atomic_t *v)
{
long flags;
local_irq_restore(flags);
}
-static __inline__ void atomic_sub(int i, atomic_t * v)
+static inline void atomic_sub(int i, atomic_t *v)
{
long flags;
}
-static inline int atomic_add_return(int i, atomic_t * v)
+static inline int atomic_add_return(int i, atomic_t *v)
{
int __temp = 0;
long flags;
return __temp;
}
-#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
-static inline int atomic_sub_return(int i, atomic_t * v)
+static inline int atomic_sub_return(int i, atomic_t *v)
{
int __temp = 0;
long flags;
return __temp;
}
-static __inline__ void atomic_inc(volatile atomic_t * v)
+static inline void atomic_inc(volatile atomic_t *v)
{
long flags;
local_irq_restore(flags);
}
-#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
-#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
-
-#define atomic_add_unless(v, a, u) \
-({ \
- int c, old; \
- c = atomic_read(v); \
- while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
- c = old; \
- c != (u); \
-})
-#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
-
-static __inline__ void atomic_dec(volatile atomic_t * v)
+static inline void atomic_dec(volatile atomic_t *v)
{
long flags;
local_irq_restore(flags);
}
-static __inline__ void atomic_clear_mask(unsigned int mask, atomic_t * v)
+static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
{
long flags;
local_irq_restore(flags);
}
-static __inline__ void atomic_set_mask(unsigned int mask, atomic_t * v)
+static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
{
long flags;
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
+#endif /* !CONFIG_SMP */
+
+#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
#define atomic_dec_return(v) atomic_sub_return(1,(v))
#define atomic_inc_return(v) atomic_add_return(1,(v))
+#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
+#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
+
+#define atomic_add_unless(v, a, u) \
+({ \
+ int c, old; \
+ c = atomic_read(v); \
+ while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
+ c = old; \
+ c != (u); \
+})
+#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
+
/*
* atomic_inc_and_test - increment and test
* @v: pointer of type atomic_t
# define DMA_UNCACHED_REGION (0)
#endif
+extern void bfin_setup_caches(unsigned int cpu);
+extern void bfin_setup_cpudata(unsigned int cpu);
+
extern unsigned long get_cclk(void);
extern unsigned long get_sclk(void);
extern unsigned long sclk_to_usecs(unsigned long sclk);
/* init functions only */
extern int init_arch_irq(void);
-extern void bfin_icache_init(void);
-extern void bfin_dcache_init(void);
extern void init_exception_vectors(void);
extern void program_IAR(void);
#include <linux/compiler.h>
#include <asm/byteorder.h> /* swab32 */
-#include <asm/system.h> /* save_flags */
#ifdef __KERNEL__
#include <asm-generic/bitops/sched.h>
#include <asm-generic/bitops/ffz.h>
-static __inline__ void set_bit(int nr, volatile unsigned long *addr)
+#ifdef CONFIG_SMP
+
+#include <linux/linkage.h>
+
+asmlinkage int __raw_bit_set_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_clear_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_toggle_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_test_set_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_test_clear_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_test_toggle_asm(volatile unsigned long *addr, int nr);
+
+asmlinkage int __raw_bit_test_asm(const volatile unsigned long *addr, int nr);
+
+static inline void set_bit(int nr, volatile unsigned long *addr)
{
- int *a = (int *)addr;
- int mask;
- unsigned long flags;
+ volatile unsigned long *a = addr + (nr >> 5);
+ __raw_bit_set_asm(a, nr & 0x1f);
+}
- a += nr >> 5;
- mask = 1 << (nr & 0x1f);
- local_irq_save(flags);
- *a |= mask;
- local_irq_restore(flags);
+static inline void clear_bit(int nr, volatile unsigned long *addr)
+{
+ volatile unsigned long *a = addr + (nr >> 5);
+ __raw_bit_clear_asm(a, nr & 0x1f);
}
-static __inline__ void __set_bit(int nr, volatile unsigned long *addr)
+static inline void change_bit(int nr, volatile unsigned long *addr)
{
- int *a = (int *)addr;
- int mask;
+ volatile unsigned long *a = addr + (nr >> 5);
+ __raw_bit_toggle_asm(a, nr & 0x1f);
+}
- a += nr >> 5;
- mask = 1 << (nr & 0x1f);
- *a |= mask;
+static inline int test_bit(int nr, const volatile unsigned long *addr)
+{
+ volatile const unsigned long *a = addr + (nr >> 5);
+ return __raw_bit_test_asm(a, nr & 0x1f) != 0;
}
-/*
- * clear_bit() doesn't provide any barrier for the compiler.
- */
-#define smp_mb__before_clear_bit() barrier()
-#define smp_mb__after_clear_bit() barrier()
+static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
+{
+ volatile unsigned long *a = addr + (nr >> 5);
+ return __raw_bit_test_set_asm(a, nr & 0x1f);
+}
-static __inline__ void clear_bit(int nr, volatile unsigned long *addr)
+static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
+{
+ volatile unsigned long *a = addr + (nr >> 5);
+ return __raw_bit_test_clear_asm(a, nr & 0x1f);
+}
+
+static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
+{
+ volatile unsigned long *a = addr + (nr >> 5);
+ return __raw_bit_test_toggle_asm(a, nr & 0x1f);
+}
+
+#else /* !CONFIG_SMP */
+
+#include <asm/system.h> /* save_flags */
+
+static inline void set_bit(int nr, volatile unsigned long *addr)
{
int *a = (int *)addr;
int mask;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
local_irq_save(flags);
- *a &= ~mask;
+ *a |= mask;
local_irq_restore(flags);
}
-static __inline__ void __clear_bit(int nr, volatile unsigned long *addr)
+static inline void clear_bit(int nr, volatile unsigned long *addr)
{
int *a = (int *)addr;
int mask;
-
+ unsigned long flags;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
+ local_irq_save(flags);
*a &= ~mask;
+ local_irq_restore(flags);
}
-static __inline__ void change_bit(int nr, volatile unsigned long *addr)
+static inline void change_bit(int nr, volatile unsigned long *addr)
{
int mask, flags;
unsigned long *ADDR = (unsigned long *)addr;
local_irq_restore(flags);
}
-static __inline__ void __change_bit(int nr, volatile unsigned long *addr)
-{
- int mask;
- unsigned long *ADDR = (unsigned long *)addr;
-
- ADDR += nr >> 5;
- mask = 1 << (nr & 31);
- *ADDR ^= mask;
-}
-
-static __inline__ int test_and_set_bit(int nr, void *addr)
+static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
{
int mask, retval;
volatile unsigned int *a = (volatile unsigned int *)addr;
return retval;
}
-static __inline__ int __test_and_set_bit(int nr, volatile unsigned long *addr)
+static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
{
int mask, retval;
volatile unsigned int *a = (volatile unsigned int *)addr;
+ unsigned long flags;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
+ local_irq_save(flags);
retval = (mask & *a) != 0;
- *a |= mask;
+ *a &= ~mask;
+ local_irq_restore(flags);
+
return retval;
}
-static __inline__ int test_and_clear_bit(int nr, volatile unsigned long *addr)
+static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
{
int mask, retval;
volatile unsigned int *a = (volatile unsigned int *)addr;
mask = 1 << (nr & 0x1f);
local_irq_save(flags);
retval = (mask & *a) != 0;
- *a &= ~mask;
+ *a ^= mask;
local_irq_restore(flags);
-
return retval;
}
-static __inline__ int __test_and_clear_bit(int nr, volatile unsigned long *addr)
+#endif /* CONFIG_SMP */
+
+/*
+ * clear_bit() doesn't provide any barrier for the compiler.
+ */
+#define smp_mb__before_clear_bit() barrier()
+#define smp_mb__after_clear_bit() barrier()
+
+static inline void __set_bit(int nr, volatile unsigned long *addr)
+{
+ int *a = (int *)addr;
+ int mask;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ *a |= mask;
+}
+
+static inline void __clear_bit(int nr, volatile unsigned long *addr)
+{
+ int *a = (int *)addr;
+ int mask;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ *a &= ~mask;
+}
+
+static inline void __change_bit(int nr, volatile unsigned long *addr)
+{
+ int mask;
+ unsigned long *ADDR = (unsigned long *)addr;
+
+ ADDR += nr >> 5;
+ mask = 1 << (nr & 31);
+ *ADDR ^= mask;
+}
+
+static inline int __test_and_set_bit(int nr, volatile unsigned long *addr)
{
int mask, retval;
volatile unsigned int *a = (volatile unsigned int *)addr;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
retval = (mask & *a) != 0;
- *a &= ~mask;
+ *a |= mask;
return retval;
}
-static __inline__ int test_and_change_bit(int nr, volatile unsigned long *addr)
+static inline int __test_and_clear_bit(int nr, volatile unsigned long *addr)
{
int mask, retval;
volatile unsigned int *a = (volatile unsigned int *)addr;
- unsigned long flags;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
- local_irq_save(flags);
retval = (mask & *a) != 0;
- *a ^= mask;
- local_irq_restore(flags);
+ *a &= ~mask;
return retval;
}
-static __inline__ int __test_and_change_bit(int nr,
+static inline int __test_and_change_bit(int nr,
volatile unsigned long *addr)
{
int mask, retval;
return retval;
}
-/*
- * This routine doesn't need to be atomic.
- */
-static __inline__ int __constant_test_bit(int nr, const void *addr)
-{
- return ((1UL << (nr & 31)) &
- (((const volatile unsigned int *)addr)[nr >> 5])) != 0;
-}
-
-static __inline__ int __test_bit(int nr, const void *addr)
+static inline int __test_bit(int nr, const void *addr)
{
int *a = (int *)addr;
int mask;
return ((mask & *a) != 0);
}
-#define test_bit(nr,addr) \
-(__builtin_constant_p(nr) ? \
- __constant_test_bit((nr),(addr)) : \
- __test_bit((nr),(addr)))
+#ifndef CONFIG_SMP
+/*
+ * This routine doesn't need irq save and restore ops in UP
+ * context.
+ */
+static inline int test_bit(int nr, const void *addr)
+{
+ return __test_bit(nr, addr);
+}
+#endif
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/hweight.h>
#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
#define SMP_CACHE_BYTES L1_CACHE_BYTES
+#ifdef CONFIG_SMP
+#define __cacheline_aligned
+#else
+#define ____cacheline_aligned
+
/*
* Put cacheline_aliged data to L1 data memory
*/
__section__(".data_l1.cacheline_aligned")))
#endif
+#endif
+
/*
* largest L1 which this arch supports
*/
#define L1_CACHE_SHIFT_MAX 5
+#if defined(CONFIG_SMP) && \
+ !defined(CONFIG_BFIN_CACHE_COHERENT) && \
+ defined(CONFIG_BFIN_DCACHE)
+#define __ARCH_SYNC_CORE_DCACHE
+#ifndef __ASSEMBLY__
+asmlinkage void __raw_smp_mark_barrier_asm(void);
+asmlinkage void __raw_smp_check_barrier_asm(void);
+
+static inline void smp_mark_barrier(void)
+{
+ __raw_smp_mark_barrier_asm();
+}
+static inline void smp_check_barrier(void)
+{
+ __raw_smp_check_barrier_asm();
+}
+
+void resync_core_dcache(void);
+#endif
+#endif
+
+
#endif
extern void blackfin_dcache_flush_range(unsigned long start_address, unsigned long end_address);
extern void blackfin_dcache_invalidate_range(unsigned long start_address, unsigned long end_address);
extern void blackfin_dflush_page(void *page);
+extern void blackfin_invalidate_entire_dcache(void);
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
#define flush_cache_vmap(start, end) do { } while (0)
#define flush_cache_vunmap(start, end) do { } while (0)
+#ifdef CONFIG_SMP
+#define flush_icache_range_others(start, end) \
+ smp_icache_flush_range_others((start), (end))
+#else
+#define flush_icache_range_others(start, end) do { } while (0)
+#endif
+
static inline void flush_icache_range(unsigned start, unsigned end)
{
#if defined(CONFIG_BFIN_DCACHE) && defined(CONFIG_BFIN_ICACHE)
# if defined(CONFIG_BFIN_WT)
blackfin_icache_flush_range((start), (end));
+ flush_icache_range_others(start, end);
# else
blackfin_icache_dcache_flush_range((start), (end));
# endif
# if defined(CONFIG_BFIN_ICACHE)
blackfin_icache_flush_range((start), (end));
+ flush_icache_range_others(start, end);
# endif
# if defined(CONFIG_BFIN_DCACHE)
blackfin_dcache_flush_range((start), (end));
#endif
}
-#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
-do { memcpy(dst, src, len); \
- flush_icache_range ((unsigned) (dst), (unsigned) (dst) + (len)); \
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+do { memcpy(dst, src, len); \
+ flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
+ flush_icache_range_others((unsigned long) (dst), (unsigned long) (dst) + (len));\
} while (0)
+
#define copy_from_user_page(vma, page, vaddr, dst, src, len) memcpy(dst, src, len)
#if defined(CONFIG_BFIN_DCACHE)
# define flush_dcache_page(page) blackfin_dflush_page(page_address(page))
#else
# define flush_dcache_range(start,end) do { } while (0)
-# define flush_dcache_page(page) do { } while (0)
+# define flush_dcache_page(page) do { } while (0)
#endif
extern unsigned long reserved_mem_dcache_on;
RETI = [sp++];
RETS = [sp++];
+#ifdef CONFIG_SMP
+ GET_PDA(p0, r0);
+ r0 = [p0 + PDA_IRQFLAGS];
+#else
p0.h = _irq_flags;
p0.l = _irq_flags;
r0 = [p0];
+#endif
sti r0;
sp += 4; /* Skip Reserved */
SYSCFG = [sp++];
csync;
.endm
-
--- /dev/null
+/*
+ * File: arch/blackfin/include/asm/cpu.h.
+ * Author: Philippe Gerum <rpm@xenomai.org>
+ *
+ * Copyright 2007 Analog Devices Inc.
+ *
+ * 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
+ */
+
+#ifndef __ASM_BLACKFIN_CPU_H
+#define __ASM_BLACKFIN_CPU_H
+
+#include <linux/percpu.h>
+
+struct task_struct;
+
+struct blackfin_cpudata {
+ struct cpu cpu;
+ struct task_struct *idle;
+ unsigned long cclk;
+ unsigned int imemctl;
+ unsigned int dmemctl;
+ unsigned long loops_per_jiffy;
+ unsigned long dcache_invld_count;
+};
+
+DECLARE_PER_CPU(struct blackfin_cpudata, cpu_data);
+
+#endif
};
/* A pointer to the structure in memory. */
-#define L1_SCRATCH_TASK_INFO ((struct l1_scratch_task_info *)L1_SCRATCH_START)
+#define L1_SCRATCH_TASK_INFO ((struct l1_scratch_task_info *)\
+ get_l1_scratch_start())
#endif
--- /dev/null
+/*
+ * include/asm-generic/mutex-dec.h
+ *
+ * Generic implementation of the mutex fastpath, based on atomic
+ * decrement/increment.
+ */
+#ifndef _ASM_GENERIC_MUTEX_DEC_H
+#define _ASM_GENERIC_MUTEX_DEC_H
+
+/**
+ * __mutex_fastpath_lock - try to take the lock by moving the count
+ * from 1 to a 0 value
+ * @count: pointer of type atomic_t
+ * @fail_fn: function to call if the original value was not 1
+ *
+ * Change the count from 1 to a value lower than 1, and call <fail_fn> if
+ * it wasn't 1 originally. This function MUST leave the value lower than
+ * 1 even when the "1" assertion wasn't true.
+ */
+static inline void
+__mutex_fastpath_lock(atomic_t *count, fastcall void (*fail_fn)(atomic_t *))
+{
+ if (unlikely(atomic_dec_return(count) < 0))
+ fail_fn(count);
+ else
+ smp_mb();
+}
+
+/**
+ * __mutex_fastpath_lock_retval - try to take the lock by moving the count
+ * from 1 to a 0 value
+ * @count: pointer of type atomic_t
+ * @fail_fn: function to call if the original value was not 1
+ *
+ * Change the count from 1 to a value lower than 1, and call <fail_fn> if
+ * it wasn't 1 originally. This function returns 0 if the fastpath succeeds,
+ * or anything the slow path function returns.
+ */
+static inline int
+__mutex_fastpath_lock_retval(atomic_t *count, fastcall int (*fail_fn)(atomic_t *))
+{
+ if (unlikely(atomic_dec_return(count) < 0))
+ return fail_fn(count);
+ else {
+ smp_mb();
+ return 0;
+ }
+}
+
+/**
+ * __mutex_fastpath_unlock - try to promote the count from 0 to 1
+ * @count: pointer of type atomic_t
+ * @fail_fn: function to call if the original value was not 0
+ *
+ * Try to promote the count from 0 to 1. If it wasn't 0, call <fail_fn>.
+ * In the failure case, this function is allowed to either set the value to
+ * 1, or to set it to a value lower than 1.
+ *
+ * If the implementation sets it to a value of lower than 1, then the
+ * __mutex_slowpath_needs_to_unlock() macro needs to return 1, it needs
+ * to return 0 otherwise.
+ */
+static inline void
+__mutex_fastpath_unlock(atomic_t *count, fastcall void (*fail_fn)(atomic_t *))
+{
+ smp_mb();
+ if (unlikely(atomic_inc_return(count) <= 0))
+ fail_fn(count);
+}
+
+#define __mutex_slowpath_needs_to_unlock() 1
+
+/**
+ * __mutex_fastpath_trylock - try to acquire the mutex, without waiting
+ *
+ * @count: pointer of type atomic_t
+ * @fail_fn: fallback function
+ *
+ * Change the count from 1 to a value lower than 1, and return 0 (failure)
+ * if it wasn't 1 originally, or return 1 (success) otherwise. This function
+ * MUST leave the value lower than 1 even when the "1" assertion wasn't true.
+ * Additionally, if the value was < 0 originally, this function must not leave
+ * it to 0 on failure.
+ *
+ * If the architecture has no effective trylock variant, it should call the
+ * <fail_fn> spinlock-based trylock variant unconditionally.
+ */
+static inline int
+__mutex_fastpath_trylock(atomic_t *count, int (*fail_fn)(atomic_t *))
+{
+ /*
+ * We have two variants here. The cmpxchg based one is the best one
+ * because it never induce a false contention state. It is included
+ * here because architectures using the inc/dec algorithms over the
+ * xchg ones are much more likely to support cmpxchg natively.
+ *
+ * If not we fall back to the spinlock based variant - that is
+ * just as efficient (and simpler) as a 'destructive' probing of
+ * the mutex state would be.
+ */
+#ifdef __HAVE_ARCH_CMPXCHG
+ if (likely(atomic_cmpxchg(count, 1, 0) == 1)) {
+ smp_mb();
+ return 1;
+ }
+ return 0;
+#else
+ return fail_fn(count);
+#endif
+}
+
+#endif
* implementation. (see asm-generic/mutex-xchg.h for details)
*/
+#ifndef _ASM_MUTEX_H
+#define _ASM_MUTEX_H
+
+#ifndef CONFIG_SMP
#include <asm-generic/mutex-dec.h>
+#else
+
+static inline void
+__mutex_fastpath_lock(atomic_t *count, void (*fail_fn)(atomic_t *))
+{
+ if (unlikely(atomic_dec_return(count) < 0))
+ fail_fn(count);
+ else
+ smp_mb();
+}
+
+static inline int
+__mutex_fastpath_lock_retval(atomic_t *count, int (*fail_fn)(atomic_t *))
+{
+ if (unlikely(atomic_dec_return(count) < 0))
+ return fail_fn(count);
+ else {
+ smp_mb();
+ return 0;
+ }
+}
+
+static inline void
+__mutex_fastpath_unlock(atomic_t *count, void (*fail_fn)(atomic_t *))
+{
+ smp_mb();
+ if (unlikely(atomic_inc_return(count) <= 0))
+ fail_fn(count);
+}
+
+#define __mutex_slowpath_needs_to_unlock() 1
+
+static inline int
+__mutex_fastpath_trylock(atomic_t *count, int (*fail_fn)(atomic_t *))
+{
+ /*
+ * We have two variants here. The cmpxchg based one is the best one
+ * because it never induce a false contention state. It is included
+ * here because architectures using the inc/dec algorithms over the
+ * xchg ones are much more likely to support cmpxchg natively.
+ *
+ * If not we fall back to the spinlock based variant - that is
+ * just as efficient (and simpler) as a 'destructive' probing of
+ * the mutex state would be.
+ */
+#ifdef __HAVE_ARCH_CMPXCHG
+ if (likely(atomic_cmpxchg(count, 1, 0) == 1)) {
+ smp_mb();
+ return 1;
+ }
+ return 0;
+#else
+ return fail_fn(count);
+#endif
+}
+
+#endif
+
+#endif
--- /dev/null
+/*
+ * File: arch/blackfin/include/asm/pda.h
+ * Author: Philippe Gerum <rpm@xenomai.org>
+ *
+ * Copyright 2007 Analog Devices Inc.
+ *
+ * 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
+ */
+
+#ifndef _ASM_BLACKFIN_PDA_H
+#define _ASM_BLACKFIN_PDA_H
+
+#include <asm/mem_map.h>
+
+#ifndef __ASSEMBLY__
+
+struct blackfin_pda { /* Per-processor Data Area */
+ struct blackfin_pda *next;
+
+ unsigned long syscfg;
+#ifdef CONFIG_SMP
+ unsigned long imask; /* Current IMASK value */
+#endif
+
+ unsigned long *ipdt; /* Start of switchable I-CPLB table */
+ unsigned long *ipdt_swapcount; /* Number of swaps in ipdt */
+ unsigned long *dpdt; /* Start of switchable D-CPLB table */
+ unsigned long *dpdt_swapcount; /* Number of swaps in dpdt */
+
+ /*
+ * Single instructions can have multiple faults, which
+ * need to be handled by traps.c, in irq5. We store
+ * the exception cause to ensure we don't miss a
+ * double fault condition
+ */
+ unsigned long ex_iptr;
+ unsigned long ex_optr;
+ unsigned long ex_buf[4];
+ unsigned long ex_imask; /* Saved imask from exception */
+ unsigned long *ex_stack; /* Exception stack space */
+
+#ifdef ANOMALY_05000261
+ unsigned long last_cplb_fault_retx;
+#endif
+ unsigned long dcplb_fault_addr;
+ unsigned long icplb_fault_addr;
+ unsigned long retx;
+ unsigned long seqstat;
+};
+
+extern struct blackfin_pda cpu_pda[];
+
+void reserve_pda(void);
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_BLACKFIN_PDA_H */
#include <asm-generic/percpu.h>
-#endif /* __ARCH_BLACKFIN_PERCPU__ */
+#ifdef CONFIG_MODULES
+#define PERCPU_MODULE_RESERVE 8192
+#else
+#define PERCPU_MODULE_RESERVE 0
+#endif
+
+#define PERCPU_ENOUGH_ROOM \
+ (ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES) + \
+ PERCPU_MODULE_RESERVE)
+
+#endif /* __ARCH_BLACKFIN_PERCPU__ */
eip; })
#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
-#define cpu_relax() barrier()
+#define cpu_relax() smp_mb()
+
/* Get the Silicon Revision of the chip */
static inline uint32_t __pure bfin_revid(void)
static inline uint16_t __pure bfin_cpuid(void)
{
return (bfin_read_CHIPID() & CHIPID_FAMILY) >> 12;
+}
+static inline uint32_t __pure bfin_dspid(void)
+{
+ return bfin_read_DSPID();
}
static inline uint32_t __pure bfin_compiled_revid(void)
--- /dev/null
+#ifndef _ASM_BLACKFIN_RWLOCK_H
+#define _ASM_BLACKFIN_RWLOCK_H
+
+#define RW_LOCK_BIAS 0x01000000
+
+#endif
--- /dev/null
+/*
+ * File: arch/blackfin/include/asm/smp.h
+ * Author: Philippe Gerum <rpm@xenomai.org>
+ *
+ * Copyright 2007 Analog Devices Inc.
+ *
+ * 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
+ */
+
+#ifndef __ASM_BLACKFIN_SMP_H
+#define __ASM_BLACKFIN_SMP_H
+
+#include <linux/kernel.h>
+#include <linux/threads.h>
+#include <linux/cpumask.h>
+#include <linux/cache.h>
+#include <asm/blackfin.h>
+#include <mach/smp.h>
+
+#define raw_smp_processor_id() blackfin_core_id()
+
+struct corelock_slot {
+ int lock;
+};
+
+void smp_icache_flush_range_others(unsigned long start,
+ unsigned long end);
+
+#endif /* !__ASM_BLACKFIN_SMP_H */
#ifndef __BFIN_SPINLOCK_H
#define __BFIN_SPINLOCK_H
-#error blackfin architecture does not support SMP spin lock yet
+#include <asm/atomic.h>
-#endif
+asmlinkage int __raw_spin_is_locked_asm(volatile int *ptr);
+asmlinkage void __raw_spin_lock_asm(volatile int *ptr);
+asmlinkage int __raw_spin_trylock_asm(volatile int *ptr);
+asmlinkage void __raw_spin_unlock_asm(volatile int *ptr);
+asmlinkage void __raw_read_lock_asm(volatile int *ptr);
+asmlinkage int __raw_read_trylock_asm(volatile int *ptr);
+asmlinkage void __raw_read_unlock_asm(volatile int *ptr);
+asmlinkage void __raw_write_lock_asm(volatile int *ptr);
+asmlinkage int __raw_write_trylock_asm(volatile int *ptr);
+asmlinkage void __raw_write_unlock_asm(volatile int *ptr);
+
+static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
+{
+ return __raw_spin_is_locked_asm(&lock->lock);
+}
+
+static inline void __raw_spin_lock(raw_spinlock_t *lock)
+{
+ __raw_spin_lock_asm(&lock->lock);
+}
+
+#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
+
+static inline int __raw_spin_trylock(raw_spinlock_t *lock)
+{
+ return __raw_spin_trylock_asm(&lock->lock);
+}
+
+static inline void __raw_spin_unlock(raw_spinlock_t *lock)
+{
+ __raw_spin_unlock_asm(&lock->lock);
+}
+
+static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock)
+{
+ while (__raw_spin_is_locked(lock))
+ cpu_relax();
+}
+
+static inline int __raw_read_can_lock(raw_rwlock_t *rw)
+{
+ return __raw_uncached_fetch_asm(&rw->lock) > 0;
+}
+
+static inline int __raw_write_can_lock(raw_rwlock_t *rw)
+{
+ return __raw_uncached_fetch_asm(&rw->lock) == RW_LOCK_BIAS;
+}
+
+static inline void __raw_read_lock(raw_rwlock_t *rw)
+{
+ __raw_read_lock_asm(&rw->lock);
+}
+
+static inline int __raw_read_trylock(raw_rwlock_t *rw)
+{
+ return __raw_read_trylock_asm(&rw->lock);
+}
+
+static inline void __raw_read_unlock(raw_rwlock_t *rw)
+{
+ __raw_read_unlock_asm(&rw->lock);
+}
+
+static inline void __raw_write_lock(raw_rwlock_t *rw)
+{
+ __raw_write_lock_asm(&rw->lock);
+}
+
+static inline int __raw_write_trylock(raw_rwlock_t *rw)
+{
+ return __raw_write_trylock_asm(&rw->lock);
+}
+
+static inline void __raw_write_unlock(raw_rwlock_t *rw)
+{
+ __raw_write_unlock_asm(&rw->lock);
+}
+
+#define _raw_spin_relax(lock) cpu_relax()
+#define _raw_read_relax(lock) cpu_relax()
+#define _raw_write_relax(lock) cpu_relax()
+
+#endif /* !__BFIN_SPINLOCK_H */
--- /dev/null
+#ifndef __ASM_SPINLOCK_TYPES_H
+#define __ASM_SPINLOCK_TYPES_H
+
+#ifndef __LINUX_SPINLOCK_TYPES_H
+# error "please don't include this file directly"
+#endif
+
+#include <asm/rwlock.h>
+
+typedef struct {
+ volatile unsigned int lock;
+} raw_spinlock_t;
+
+#define __RAW_SPIN_LOCK_UNLOCKED { 0 }
+
+typedef struct {
+ volatile unsigned int lock;
+} raw_rwlock_t;
+
+#define __RAW_RW_LOCK_UNLOCKED { RW_LOCK_BIAS }
+
+#endif
#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; \
# 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 \
#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];
(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)
(last) = resume (prev, next); \
} while (0)
-#endif /* _BLACKFIN_SYSTEM_H */
+#endif /* _BLACKFIN_SYSTEM_H */
obj-$(CONFIG_PM) += pm.o dpmc_modes.o
obj-$(CONFIG_CPU_FREQ) += cpufreq.o
obj-$(CONFIG_CPU_VOLTAGE) += dpmc.o
+obj-$(CONFIG_SMP) += smp.o
P1 = 1 << (PAGE_SHIFT - L1_CACHE_SHIFT);
jump .Ldfr;
ENDPROC(_blackfin_dflush_page)
+
+/* Invalidate the Entire Data cache by
+ * clearing DMC[1:0] bits
+ */
+ENTRY(_blackfin_invalidate_entire_dcache)
+ [--SP] = ( R7:5);
+
+ P0.L = LO(DMEM_CONTROL);
+ P0.H = HI(DMEM_CONTROL);
+ R7 = [P0];
+ R5 = R7; /* Save DMEM_CNTR */
+
+ /* Clear the DMC[1:0] bits, All valid bits in the data
+ * cache are set to the invalid state
+ */
+ BITCLR(R7,DMC0_P);
+ BITCLR(R7,DMC1_P);
+ CLI R6;
+ SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
+ .align 8;
+ [P0] = R7;
+ SSYNC;
+ STI R6;
+
+ /* Configures the data cache again */
+
+ CLI R6;
+ SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
+ .align 8;
+ [P0] = R5;
+ SSYNC;
+ STI R6;
+
+ ( R7:5) = [SP++];
+ RTS;
+ENDPROC(_blackfin_invalidate_entire_dcache)
#include <linux/init.h>
#include <linux/linkage.h>
#include <linux/unistd.h>
+#include <linux/threads.h>
#include <asm/blackfin.h>
#include <asm/errno.h>
#include <asm/fixed_code.h>
* handle it.
*/
P4 = R7; /* Store EXCAUSE */
- p5.l = _last_cplb_fault_retx;
- p5.h = _last_cplb_fault_retx;
- r7 = [p5];
+
+ GET_PDA(p5, r7);
+ r7 = [p5 + PDA_LFRETX];
r6 = retx;
- [p5] = r6;
+ [p5 + PDA_LFRETX] = r6;
cc = r6 == r7;
if !cc jump _bfin_return_from_exception;
/* fall through */
[p4] = p5;
csync;
+ GET_PDA(p5, r6);
#ifndef CONFIG_DEBUG_DOUBLEFAULT
+
/*
* Save these registers, as they are only valid in exception context
* (where we are now - as soon as we defer to IRQ5, they can change)
p4.l = lo(DCPLB_FAULT_ADDR);
p4.h = hi(DCPLB_FAULT_ADDR);
r7 = [p4];
- p5.h = _saved_dcplb_fault_addr;
- p5.l = _saved_dcplb_fault_addr;
- [p5] = r7;
+ [p5 + PDA_DCPLB] = r7;
- r7 = [p4 + (ICPLB_FAULT_ADDR - DCPLB_FAULT_ADDR)];
- p5.h = _saved_icplb_fault_addr;
- p5.l = _saved_icplb_fault_addr;
- [p5] = r7;
+ p4.l = lo(ICPLB_FAULT_ADDR);
+ p4.h = hi(ICPLB_FAULT_ADDR);
+ r6 = [p4];
+ [p5 + PDA_ICPLB] = r6;
r6 = retx;
- p4.l = _saved_retx;
- p4.h = _saved_retx;
- [p4] = r6;
+ [p5 + PDA_RETX] = r6;
#endif
r6 = SYSCFG;
- [p4 + 4] = r6;
+ [p5 + PDA_SYSCFG] = r6;
BITCLR(r6, 0);
SYSCFG = r6;
/* Disable all interrupts, but make sure level 5 is enabled so
* we can switch to that level. Save the old mask. */
cli r6;
- [p4 + 8] = r6;
+ [p5 + PDA_EXIMASK] = r6;
p4.l = lo(SAFE_USER_INSTRUCTION);
p4.h = hi(SAFE_USER_INSTRUCTION);
ENTRY(_exception_to_level5)
SAVE_ALL_SYS
- p4.l = _saved_retx;
- p4.h = _saved_retx;
- r6 = [p4];
+ GET_PDA(p4, r7); /* Fetch current PDA */
+ r6 = [p4 + PDA_RETX];
[sp + PT_PC] = r6;
- r6 = [p4 + 4];
+ r6 = [p4 + PDA_SYSCFG];
[sp + PT_SYSCFG] = r6;
/* Restore interrupt mask. We haven't pushed RETI, so this
* doesn't enable interrupts until we return from this handler. */
- r6 = [p4 + 8];
+ r6 = [p4 + PDA_EXIMASK];
sti r6;
/* Restore the hardware error vector. */
* scratch register (for want of a better option).
*/
EX_SCRATCH_REG = sp;
- sp.l = _exception_stack_top;
- sp.h = _exception_stack_top;
+ GET_PDA_SAFE(sp);
+ sp = [sp + PDA_EXSTACK]
/* Try to deal with syscalls quickly. */
[--sp] = ASTAT;
[--sp] = (R7:6,P5:4);
* but they are not very interesting, so don't save them
*/
+ GET_PDA(p5, r7);
p4.l = lo(DCPLB_FAULT_ADDR);
p4.h = hi(DCPLB_FAULT_ADDR);
r7 = [p4];
- p5.h = _saved_dcplb_fault_addr;
- p5.l = _saved_dcplb_fault_addr;
- [p5] = r7;
+ [p5 + PDA_DCPLB] = r7;
- r7 = [p4 + (ICPLB_FAULT_ADDR - DCPLB_FAULT_ADDR)];
- p5.h = _saved_icplb_fault_addr;
- p5.l = _saved_icplb_fault_addr;
- [p5] = r7;
+ p4.l = lo(ICPLB_FAULT_ADDR);
+ p4.h = hi(ICPLB_FAULT_ADDR);
+ r7 = [p4];
+ [p5 + PDA_ICPLB] = r7;
- p4.l = _saved_retx;
- p4.h = _saved_retx;
r6 = retx;
- [p4] = r6;
+ [p5 + PDA_RETX] = r6;
r7 = SEQSTAT; /* reason code is in bit 5:0 */
- p4.l = _saved_seqstat;
- p4.h = _saved_seqstat;
- [p4] = r7;
+ [p5 + PDA_SEQSTAT] = r7;
#else
r7 = SEQSTAT; /* reason code is in bit 5:0 */
#endif
p0 = sp;
r3 = SIZEOF_PTREGS / 4;
r4 = 0(x);
-0:
+.Lclear_regs:
[p0++] = r4;
r3 += -1;
cc = r3 == 0;
- if !cc jump 0b (bp);
+ if !cc jump .Lclear_regs (bp);
p0 = sp;
sp += -16;
call _do_execve;
SP += 16;
cc = r0 == 0;
- if ! cc jump 1f;
+ if ! cc jump .Lexecve_failed;
/* Success. Copy our temporary pt_regs to the top of the kernel
* stack and do a normal exception return.
*/
p0 = fp;
r4 = [p0--];
r3 = SIZEOF_PTREGS / 4;
-0:
+.Lcopy_regs:
r4 = [p0--];
[p1--] = r4;
r3 += -1;
cc = r3 == 0;
- if ! cc jump 0b (bp);
+ if ! cc jump .Lcopy_regs (bp);
r0 = (KERNEL_STACK_SIZE - SIZEOF_PTREGS) (z);
p1 = r0;
RESTORE_CONTEXT;
rti;
-1:
+.Lexecve_failed:
unlink;
rts;
ENDPROC(_kernel_execve)
p1 = rets;
[sp + PT_RESERVED] = p1;
+#ifdef CONFIG_SMP
+ GET_PDA(p0, r0); /* Fetch current PDA (can't migrate to other CPU here) */
+ r0 = [p0 + PDA_IRQFLAGS];
+#else
p0.l = _irq_flags;
p0.h = _irq_flags;
r0 = [p0];
+#endif
sti r0;
r0 = sp;
.endr
END(_sys_call_table)
-#if ANOMALY_05000261
-/* Used by the assembly entry point to work around an anomaly. */
-_last_cplb_fault_retx:
- .long 0;
-#endif
-
#ifdef CONFIG_EXCEPTION_L1_SCRATCH
/* .section .l1.bss.scratch */
.set _exception_stack_top, L1_SCRATCH_START + L1_SCRATCH_LENGTH
#else
.bss
#endif
-_exception_stack:
- .rept 1024
+ENTRY(_exception_stack)
+ .rept 1024 * NR_CPUS
.long 0
.endr
_exception_stack_top:
#include <asm/blackfin.h>
#include <asm/thread_info.h>
#include <asm/trace.h>
+#include <asm/asm-offsets.h>
__INIT
* This happens here, since L1 gets clobbered
* below
*/
- p0.l = _saved_retx;
- p0.h = _saved_retx;
+ GET_PDA(p0, r0);
+ r7 = [p0 + PDA_RETX];
p1.l = _init_saved_retx;
p1.h = _init_saved_retx;
- r0 = [p0];
- [p1] = r0;
+ [p1] = r7;
- p0.l = _saved_dcplb_fault_addr;
- p0.h = _saved_dcplb_fault_addr;
+ r7 = [p0 + PDA_DCPLB];
p1.l = _init_saved_dcplb_fault_addr;
p1.h = _init_saved_dcplb_fault_addr;
- r0 = [p0];
- [p1] = r0;
+ [p1] = r7;
- p0.l = _saved_icplb_fault_addr;
- p0.h = _saved_icplb_fault_addr;
+ r7 = [p0 + PDA_ICPLB];
p1.l = _init_saved_icplb_fault_addr;
p1.h = _init_saved_icplb_fault_addr;
- r0 = [p0];
- [p1] = r0;
+ [p1] = r7;
- p0.l = _saved_seqstat;
- p0.h = _saved_seqstat;
+ r7 = [p0 + PDA_SEQSTAT];
p1.l = _init_saved_seqstat;
p1.h = _init_saved_seqstat;
- r0 = [p0];
- [p1] = r0;
+ [p1] = r7;
#endif
/* Initialize stack pointer */
sp = sp + p1;
usp = sp;
fp = sp;
+ sp += -12;
+ call _init_pda
+ sp += 12;
jump.l _start_kernel;
ENDPROC(_real_start)
* -
*/
+#ifndef CONFIG_SMP
/* Initialize this to an actual value to force it into the .data
* section so that we know it is properly initialized at entry into
* the kernel but before bss is initialized to zero (which is where
*/
unsigned long irq_flags = 0x1f;
EXPORT_SYMBOL(irq_flags);
+#endif
/* The number of spurious interrupts */
atomic_t num_spurious;
mask_bit = SIC_SYSIRQ(irq) % 32;
bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) &
~(1 << mask_bit));
+#ifdef CONFIG_SMP
+ bfin_write_SICB_IMASK(mask_bank, bfin_read_SICB_IMASK(mask_bank) &
+ ~(1 << mask_bit));
+#endif
#endif
}
mask_bit = SIC_SYSIRQ(irq) % 32;
bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) |
(1 << mask_bit));
+#ifdef CONFIG_SMP
+ bfin_write_SICB_IMASK(mask_bank, bfin_read_SICB_IMASK(mask_bank) |
+ (1 << mask_bit));
+#endif
#endif
}
#endif
};
-void __init init_exception_vectors(void)
+void __cpuinit init_exception_vectors(void)
{
/* cannot program in software:
* evt0 - emulation (jtag)
# ifdef CONFIG_BF54x
bfin_write_SIC_IMASK2(SIC_UNMASK_ALL);
# endif
+# ifdef CONFIG_SMP
+ bfin_write_SICB_IMASK0(SIC_UNMASK_ALL);
+ bfin_write_SICB_IMASK1(SIC_UNMASK_ALL);
+# endif
#else
bfin_write_SIC_IMASK(SIC_UNMASK_ALL);
#endif
break;
#endif
+#ifdef CONFIG_TICK_SOURCE_SYSTMR0
+ case IRQ_TIMER0:
+ set_irq_handler(irq, handle_percpu_irq);
+ break;
+#endif
+#ifdef CONFIG_SMP
+ case IRQ_SUPPLE_0:
+ case IRQ_SUPPLE_1:
+ set_irq_handler(irq, handle_percpu_irq);
+ break;
+#endif
default:
set_irq_handler(irq, handle_simple_irq);
break;
search_IAR();
/* Enable interrupts IVG7-15 */
- irq_flags = irq_flags | IMASK_IVG15 |
+ irq_flags |= IMASK_IVG15 |
IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 |
IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW;
|| defined(BF538_FAMILY) || defined(CONFIG_BF51x)
unsigned long sic_status[3];
- sic_status[0] = bfin_read_SIC_ISR0() & bfin_read_SIC_IMASK0();
- sic_status[1] = bfin_read_SIC_ISR1() & bfin_read_SIC_IMASK1();
+ if (smp_processor_id()) {
+#ifdef CONFIG_SMP
+ /* This will be optimized out in UP mode. */
+ sic_status[0] = bfin_read_SICB_ISR0() & bfin_read_SICB_IMASK0();
+ sic_status[1] = bfin_read_SICB_ISR1() & bfin_read_SICB_IMASK1();
+#endif
+ } else {
+ sic_status[0] = bfin_read_SIC_ISR0() & bfin_read_SIC_IMASK0();
+ sic_status[1] = bfin_read_SIC_ISR1() & bfin_read_SIC_IMASK1();
+ }
#ifdef CONFIG_BF54x
sic_status[2] = bfin_read_SIC_ISR2() & bfin_read_SIC_IMASK2();
#endif
--- /dev/null
+/*
+ * File: arch/blackfin/kernel/smp.c
+ * Author: Philippe Gerum <rpm@xenomai.org>
+ * IPI management based on arch/arm/kernel/smp.c.
+ *
+ * Copyright 2007 Analog Devices Inc.
+ *
+ * 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/module.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/cache.h>
+#include <linux/profile.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/cpu.h>
+#include <linux/smp.h>
+#include <linux/seq_file.h>
+#include <linux/irq.h>
+#include <asm/atomic.h>
+#include <asm/cacheflush.h>
+#include <asm/mmu_context.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/processor.h>
+#include <asm/ptrace.h>
+#include <asm/cpu.h>
+#include <linux/err.h>
+
+struct corelock_slot corelock __attribute__ ((__section__(".l2.bss")));
+
+void __cpuinitdata *init_retx_coreb, *init_saved_retx_coreb,
+ *init_saved_seqstat_coreb, *init_saved_icplb_fault_addr_coreb,
+ *init_saved_dcplb_fault_addr_coreb;
+
+cpumask_t cpu_possible_map;
+EXPORT_SYMBOL(cpu_possible_map);
+
+cpumask_t cpu_online_map;
+EXPORT_SYMBOL(cpu_online_map);
+
+#define BFIN_IPI_RESCHEDULE 0
+#define BFIN_IPI_CALL_FUNC 1
+#define BFIN_IPI_CPU_STOP 2
+
+struct blackfin_flush_data {
+ unsigned long start;
+ unsigned long end;
+};
+
+void *secondary_stack;
+
+
+struct smp_call_struct {
+ void (*func)(void *info);
+ void *info;
+ int wait;
+ cpumask_t pending;
+ cpumask_t waitmask;
+};
+
+static struct blackfin_flush_data smp_flush_data;
+
+static DEFINE_SPINLOCK(stop_lock);
+
+struct ipi_message {
+ struct list_head list;
+ unsigned long type;
+ struct smp_call_struct call_struct;
+};
+
+struct ipi_message_queue {
+ struct list_head head;
+ spinlock_t lock;
+ unsigned long count;
+};
+
+static DEFINE_PER_CPU(struct ipi_message_queue, ipi_msg_queue);
+
+static void ipi_cpu_stop(unsigned int cpu)
+{
+ spin_lock(&stop_lock);
+ printk(KERN_CRIT "CPU%u: stopping\n", cpu);
+ dump_stack();
+ spin_unlock(&stop_lock);
+
+ cpu_clear(cpu, cpu_online_map);
+
+ local_irq_disable();
+
+ while (1)
+ SSYNC();
+}
+
+static void ipi_flush_icache(void *info)
+{
+ struct blackfin_flush_data *fdata = info;
+
+ /* Invalidate the memory holding the bounds of the flushed region. */
+ blackfin_dcache_invalidate_range((unsigned long)fdata,
+ (unsigned long)fdata + sizeof(*fdata));
+
+ blackfin_icache_flush_range(fdata->start, fdata->end);
+}
+
+static void ipi_call_function(unsigned int cpu, struct ipi_message *msg)
+{
+ int wait;
+ void (*func)(void *info);
+ void *info;
+ func = msg->call_struct.func;
+ info = msg->call_struct.info;
+ wait = msg->call_struct.wait;
+ cpu_clear(cpu, msg->call_struct.pending);
+ func(info);
+ if (wait)
+ cpu_clear(cpu, msg->call_struct.waitmask);
+ else
+ kfree(msg);
+}
+
+static irqreturn_t ipi_handler(int irq, void *dev_instance)
+{
+ struct ipi_message *msg, *mg;
+ struct ipi_message_queue *msg_queue;
+ unsigned int cpu = smp_processor_id();
+
+ platform_clear_ipi(cpu);
+
+ msg_queue = &__get_cpu_var(ipi_msg_queue);
+ msg_queue->count++;
+
+ spin_lock(&msg_queue->lock);
+ list_for_each_entry_safe(msg, mg, &msg_queue->head, list) {
+ list_del(&msg->list);
+ switch (msg->type) {
+ case BFIN_IPI_RESCHEDULE:
+ /* That's the easiest one; leave it to
+ * return_from_int. */
+ kfree(msg);
+ break;
+ case BFIN_IPI_CALL_FUNC:
+ ipi_call_function(cpu, msg);
+ break;
+ case BFIN_IPI_CPU_STOP:
+ ipi_cpu_stop(cpu);
+ kfree(msg);
+ break;
+ default:
+ printk(KERN_CRIT "CPU%u: Unknown IPI message \
+ 0x%lx\n", cpu, msg->type);
+ kfree(msg);
+ break;
+ }
+ }
+ spin_unlock(&msg_queue->lock);
+ return IRQ_HANDLED;
+}
+
+static void ipi_queue_init(void)
+{
+ unsigned int cpu;
+ struct ipi_message_queue *msg_queue;
+ for_each_possible_cpu(cpu) {
+ msg_queue = &per_cpu(ipi_msg_queue, cpu);
+ INIT_LIST_HEAD(&msg_queue->head);
+ spin_lock_init(&msg_queue->lock);
+ msg_queue->count = 0;
+ }
+}
+
+int smp_call_function(void (*func)(void *info), void *info, int wait)
+{
+ unsigned int cpu;
+ cpumask_t callmap;
+ unsigned long flags;
+ struct ipi_message_queue *msg_queue;
+ struct ipi_message *msg;
+
+ callmap = cpu_online_map;
+ cpu_clear(smp_processor_id(), callmap);
+ if (cpus_empty(callmap))
+ return 0;
+
+ msg = kmalloc(sizeof(*msg), GFP_ATOMIC);
+ INIT_LIST_HEAD(&msg->list);
+ msg->call_struct.func = func;
+ msg->call_struct.info = info;
+ msg->call_struct.wait = wait;
+ msg->call_struct.pending = callmap;
+ msg->call_struct.waitmask = callmap;
+ msg->type = BFIN_IPI_CALL_FUNC;
+
+ for_each_cpu_mask(cpu, callmap) {
+ msg_queue = &per_cpu(ipi_msg_queue, cpu);
+ spin_lock_irqsave(&msg_queue->lock, flags);
+ list_add(&msg->list, &msg_queue->head);
+ spin_unlock_irqrestore(&msg_queue->lock, flags);
+ platform_send_ipi_cpu(cpu);
+ }
+ if (wait) {
+ while (!cpus_empty(msg->call_struct.waitmask))
+ blackfin_dcache_invalidate_range(
+ (unsigned long)(&msg->call_struct.waitmask),
+ (unsigned long)(&msg->call_struct.waitmask));
+ kfree(msg);
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(smp_call_function);
+
+int smp_call_function_single(int cpuid, void (*func) (void *info), void *info,
+ int wait)
+{
+ unsigned int cpu = cpuid;
+ cpumask_t callmap;
+ unsigned long flags;
+ struct ipi_message_queue *msg_queue;
+ struct ipi_message *msg;
+
+ if (cpu_is_offline(cpu))
+ return 0;
+ cpus_clear(callmap);
+ cpu_set(cpu, callmap);
+
+ msg = kmalloc(sizeof(*msg), GFP_ATOMIC);
+ INIT_LIST_HEAD(&msg->list);
+ msg->call_struct.func = func;
+ msg->call_struct.info = info;
+ msg->call_struct.wait = wait;
+ msg->call_struct.pending = callmap;
+ msg->call_struct.waitmask = callmap;
+ msg->type = BFIN_IPI_CALL_FUNC;
+
+ msg_queue = &per_cpu(ipi_msg_queue, cpu);
+ spin_lock_irqsave(&msg_queue->lock, flags);
+ list_add(&msg->list, &msg_queue->head);
+ spin_unlock_irqrestore(&msg_queue->lock, flags);
+ platform_send_ipi_cpu(cpu);
+
+ if (wait) {
+ while (!cpus_empty(msg->call_struct.waitmask))
+ blackfin_dcache_invalidate_range(
+ (unsigned long)(&msg->call_struct.waitmask),
+ (unsigned long)(&msg->call_struct.waitmask));
+ kfree(msg);
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(smp_call_function_single);
+
+void smp_send_reschedule(int cpu)
+{
+ unsigned long flags;
+ struct ipi_message_queue *msg_queue;
+ struct ipi_message *msg;
+
+ if (cpu_is_offline(cpu))
+ return;
+
+ msg = kmalloc(sizeof(*msg), GFP_ATOMIC);
+ memset(msg, 0, sizeof(msg));
+ INIT_LIST_HEAD(&msg->list);
+ msg->type = BFIN_IPI_RESCHEDULE;
+
+ msg_queue = &per_cpu(ipi_msg_queue, cpu);
+ spin_lock_irqsave(&msg_queue->lock, flags);
+ list_add(&msg->list, &msg_queue->head);
+ spin_unlock_irqrestore(&msg_queue->lock, flags);
+ platform_send_ipi_cpu(cpu);
+
+ return;
+}
+
+void smp_send_stop(void)
+{
+ unsigned int cpu;
+ cpumask_t callmap;
+ unsigned long flags;
+ struct ipi_message_queue *msg_queue;
+ struct ipi_message *msg;
+
+ callmap = cpu_online_map;
+ cpu_clear(smp_processor_id(), callmap);
+ if (cpus_empty(callmap))
+ return;
+
+ msg = kmalloc(sizeof(*msg), GFP_ATOMIC);
+ memset(msg, 0, sizeof(msg));
+ INIT_LIST_HEAD(&msg->list);
+ msg->type = BFIN_IPI_CPU_STOP;
+
+ for_each_cpu_mask(cpu, callmap) {
+ msg_queue = &per_cpu(ipi_msg_queue, cpu);
+ spin_lock_irqsave(&msg_queue->lock, flags);
+ list_add(&msg->list, &msg_queue->head);
+ spin_unlock_irqrestore(&msg_queue->lock, flags);
+ platform_send_ipi_cpu(cpu);
+ }
+ return;
+}
+
+int __cpuinit __cpu_up(unsigned int cpu)
+{
+ struct task_struct *idle;
+ int ret;
+
+ idle = fork_idle(cpu);
+ if (IS_ERR(idle)) {
+ printk(KERN_ERR "CPU%u: fork() failed\n", cpu);
+ return PTR_ERR(idle);
+ }
+
+ secondary_stack = task_stack_page(idle) + THREAD_SIZE;
+ smp_wmb();
+
+ ret = platform_boot_secondary(cpu, idle);
+
+ if (ret) {
+ cpu_clear(cpu, cpu_present_map);
+ printk(KERN_CRIT "CPU%u: processor failed to boot (%d)\n", cpu, ret);
+ free_task(idle);
+ } else
+ cpu_set(cpu, cpu_online_map);
+
+ secondary_stack = NULL;
+
+ return ret;
+}
+
+static void __cpuinit setup_secondary(unsigned int cpu)
+{
+#ifndef CONFIG_TICK_SOURCE_SYSTMR0
+ struct irq_desc *timer_desc;
+#endif
+ unsigned long ilat;
+
+ bfin_write_IMASK(0);
+ CSYNC();
+ ilat = bfin_read_ILAT();
+ CSYNC();
+ bfin_write_ILAT(ilat);
+ CSYNC();
+
+ /* Reserve the PDA space for the secondary CPU. */
+ reserve_pda();
+
+ /* Enable interrupt levels IVG7-15. IARs have been already
+ * programmed by the boot CPU. */
+ irq_flags |= IMASK_IVG15 |
+ IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 |
+ IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW;
+
+#ifdef CONFIG_TICK_SOURCE_SYSTMR0
+ /* Power down the core timer, just to play safe. */
+ bfin_write_TCNTL(0);
+
+ /* system timer0 has been setup by CoreA. */
+#else
+ timer_desc = irq_desc + IRQ_CORETMR;
+ setup_core_timer();
+ timer_desc->chip->enable(IRQ_CORETMR);
+#endif
+}
+
+void __cpuinit secondary_start_kernel(void)
+{
+ unsigned int cpu = smp_processor_id();
+ struct mm_struct *mm = &init_mm;
+
+ if (_bfin_swrst & SWRST_DBL_FAULT_B) {
+ printk(KERN_EMERG "CoreB Recovering from DOUBLE FAULT event\n");
+#ifdef CONFIG_DEBUG_DOUBLEFAULT
+ printk(KERN_EMERG " While handling exception (EXCAUSE = 0x%x) at %pF\n",
+ (int)init_saved_seqstat_coreb & SEQSTAT_EXCAUSE, init_saved_retx_coreb);
+ printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %pF\n", init_saved_dcplb_fault_addr_coreb);
+ printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %pF\n", init_saved_icplb_fault_addr_coreb);
+#endif
+ printk(KERN_NOTICE " The instruction at %pF caused a double exception\n",
+ init_retx_coreb);
+ }
+
+ /*
+ * We want the D-cache to be enabled early, in case the atomic
+ * support code emulates cache coherence (see
+ * __ARCH_SYNC_CORE_DCACHE).
+ */
+ init_exception_vectors();
+
+ bfin_setup_caches(cpu);
+
+ local_irq_disable();
+
+ /* Attach the new idle task to the global mm. */
+ atomic_inc(&mm->mm_users);
+ atomic_inc(&mm->mm_count);
+ current->active_mm = mm;
+ BUG_ON(current->mm); /* Can't be, but better be safe than sorry. */
+
+ preempt_disable();
+
+ setup_secondary(cpu);
+
+ local_irq_enable();
+
+ platform_secondary_init(cpu);
+
+ cpu_idle();
+}
+
+void __init smp_prepare_boot_cpu(void)
+{
+}
+
+void __init smp_prepare_cpus(unsigned int max_cpus)
+{
+ platform_prepare_cpus(max_cpus);
+ ipi_queue_init();
+ platform_request_ipi(&ipi_handler);
+}
+
+void __init smp_cpus_done(unsigned int max_cpus)
+{
+ unsigned long bogosum = 0;
+ unsigned int cpu;
+
+ for_each_online_cpu(cpu)
+ bogosum += per_cpu(cpu_data, cpu).loops_per_jiffy;
+
+ printk(KERN_INFO "SMP: Total of %d processors activated "
+ "(%lu.%02lu BogoMIPS).\n",
+ num_online_cpus(),
+ bogosum / (500000/HZ),
+ (bogosum / (5000/HZ)) % 100);
+}
+
+void smp_icache_flush_range_others(unsigned long start, unsigned long end)
+{
+ smp_flush_data.start = start;
+ smp_flush_data.end = end;
+
+ if (smp_call_function(&ipi_flush_icache, &smp_flush_data, 1))
+ printk(KERN_WARNING "SMP: failed to run I-cache flush request on other CPUs\n");
+}
+EXPORT_SYMBOL_GPL(smp_icache_flush_range_others);
+
+#ifdef __ARCH_SYNC_CORE_DCACHE
+unsigned long barrier_mask __attribute__ ((__section__(".l2.bss")));
+
+void resync_core_dcache(void)
+{
+ unsigned int cpu = get_cpu();
+ blackfin_invalidate_entire_dcache();
+ ++per_cpu(cpu_data, cpu).dcache_invld_count;
+ put_cpu();
+}
+EXPORT_SYMBOL(resync_core_dcache);
+#endif
mutex_init(&pfmon_lock);
- dspid = bfin_read_DSPID();
+ dspid = bfin_dspid();
printk(KERN_INFO "Oprofile got the cpu id is 0x%x. \n", dspid);
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff