diff options
Diffstat (limited to 'linux-core')
| -rw-r--r-- | linux-core/drmP.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h index d6de193d..2bfd4bef 100644 --- a/linux-core/drmP.h +++ b/linux-core/drmP.h @@ -33,6 +33,12 @@ #define _DRM_P_H_ #ifdef __KERNEL__ +#ifdef __alpha__ +/* add include of current.h so that "current" is defined + * before static inline funcs in wait.h. Doing this so we + * can build the DRM (part of PI DRI). 4/21/2000 S + B */ +#include <asm/current.h> +#endif /* __alpha__ */ #include <linux/config.h> #include <linux/module.h> #include <linux/kernel.h> @@ -47,6 +53,9 @@ #include <linux/sched.h> #include <linux/smp_lock.h> /* For (un)lock_kernel */ #include <linux/mm.h> +#ifdef __alpha__ +#include <asm/pgtable.h> /* For pte_wrprotect */ +#endif #include <asm/io.h> #include <asm/mman.h> #include <asm/uaccess.h> @@ -147,6 +156,71 @@ typedef struct wait_queue *wait_queue_head_t; #ifndef __HAVE_ARCH_CMPXCHG /* Include this here so that driver can be used with older kernels. */ +#if defined(__alpha__) +static __inline__ unsigned long +__cmpxchg_u32(volatile int *m, int old, int new) +{ + unsigned long prev, cmp; + + __asm__ __volatile__( + "1: ldl_l %0,%2\n" + " cmpeq %0,%3,%1\n" + " beq %1,2f\n" + " mov %4,%1\n" + " stl_c %1,%2\n" + " beq %1,3f\n" + "2: mb\n" + ".subsection 2\n" + "3: br 1b\n" + ".previous" + : "=&r"(prev), "=&r"(cmp), "=m"(*m) + : "r"((long) old), "r"(new), "m"(*m)); + + return prev; +} + +static __inline__ unsigned long +__cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new) +{ + unsigned long prev, cmp; + + __asm__ __volatile__( + "1: ldq_l %0,%2\n" + " cmpeq %0,%3,%1\n" + " beq %1,2f\n" + " mov %4,%1\n" + " stq_c %1,%2\n" + " beq %1,3f\n" + "2: mb\n" + ".subsection 2\n" + "3: br 1b\n" + ".previous" + : "=&r"(prev), "=&r"(cmp), "=m"(*m) + : "r"((long) old), "r"(new), "m"(*m)); + + return prev; +} + +static __inline__ unsigned long +__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) +{ + switch (size) { + case 4: + return __cmpxchg_u32(ptr, old, new); + case 8: + return __cmpxchg_u64(ptr, old, new); + } + return old; +} +#define cmpxchg(ptr,o,n) \ + ({ \ + __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _n_ = (n); \ + (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ + (unsigned long)_n_, sizeof(*(ptr))); \ + }) + +#elif __i386__ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) { @@ -177,6 +251,7 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, #define cmpxchg(ptr,o,n) \ ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o), \ (unsigned long)(n),sizeof(*(ptr)))) +#endif /* i386 & alpha */ #endif /* Macros to make printk easier */ |