| #ifndef _ASM_IA64_UNALIGNED_H |
| #define _ASM_IA64_UNALIGNED_H |
| |
| #include <linux/types.h> |
| |
| /* |
| * The main single-value unaligned transfer routines. Derived from |
| * the Linux/Alpha version. |
| * |
| * Copyright (C) 1998, 1999 Hewlett-Packard Co |
| * Copyright (C) 1998, 1999 David Mosberger-Tang <davidm@hpl.hp.com> |
| */ |
| #define get_unaligned(ptr) \ |
| ((__typeof__(*(ptr)))ia64_get_unaligned((ptr), sizeof(*(ptr)))) |
| |
| #define put_unaligned(x,ptr) \ |
| ia64_put_unaligned((unsigned long)(x), (ptr), sizeof(*(ptr))) |
| |
| /* |
| * EGCS 1.1 knows about arbitrary unaligned loads. Define some |
| * packed structures to talk about such things with. |
| */ |
| struct __una_u64 { __u64 x __attribute__((packed)); }; |
| struct __una_u32 { __u32 x __attribute__((packed)); }; |
| struct __una_u16 { __u16 x __attribute__((packed)); }; |
| |
| static inline unsigned long |
| __uldq (const unsigned long * r11) |
| { |
| const struct __una_u64 *ptr = (const struct __una_u64 *) r11; |
| return ptr->x; |
| } |
| |
| static inline unsigned long |
| __uldl (const unsigned int * r11) |
| { |
| const struct __una_u32 *ptr = (const struct __una_u32 *) r11; |
| return ptr->x; |
| } |
| |
| static inline unsigned long |
| __uldw (const unsigned short * r11) |
| { |
| const struct __una_u16 *ptr = (const struct __una_u16 *) r11; |
| return ptr->x; |
| } |
| |
| static inline void |
| __ustq (unsigned long r5, unsigned long * r11) |
| { |
| struct __una_u64 *ptr = (struct __una_u64 *) r11; |
| ptr->x = r5; |
| } |
| |
| static inline void |
| __ustl (unsigned long r5, unsigned int * r11) |
| { |
| struct __una_u32 *ptr = (struct __una_u32 *) r11; |
| ptr->x = r5; |
| } |
| |
| static inline void |
| __ustw (unsigned long r5, unsigned short * r11) |
| { |
| struct __una_u16 *ptr = (struct __una_u16 *) r11; |
| ptr->x = r5; |
| } |
| |
| |
| /* |
| * This function doesn't actually exist. The idea is that when |
| * someone uses the macros below with an unsupported size (datatype), |
| * the linker will alert us to the problem via an unresolved reference |
| * error. |
| */ |
| extern unsigned long ia64_bad_unaligned_access_length (void); |
| |
| #define ia64_get_unaligned(_ptr,size) \ |
| ({ \ |
| const void *ptr = (_ptr); \ |
| unsigned long val; \ |
| \ |
| switch (size) { \ |
| case 1: \ |
| val = *(const unsigned char *) ptr; \ |
| break; \ |
| case 2: \ |
| val = __uldw((const unsigned short *)ptr); \ |
| break; \ |
| case 4: \ |
| val = __uldl((const unsigned int *)ptr); \ |
| break; \ |
| case 8: \ |
| val = __uldq((const unsigned long *)ptr); \ |
| break; \ |
| default: \ |
| val = ia64_bad_unaligned_access_length(); \ |
| } \ |
| val; \ |
| }) |
| |
| #define ia64_put_unaligned(_val,_ptr,size) \ |
| do { \ |
| const void *ptr = (_ptr); \ |
| unsigned long val = (_val); \ |
| \ |
| switch (size) { \ |
| case 1: \ |
| *(unsigned char *)ptr = (val); \ |
| break; \ |
| case 2: \ |
| __ustw(val, (unsigned short *)ptr); \ |
| break; \ |
| case 4: \ |
| __ustl(val, (unsigned int *)ptr); \ |
| break; \ |
| case 8: \ |
| __ustq(val, (unsigned long *)ptr); \ |
| break; \ |
| default: \ |
| ia64_bad_unaligned_access_length(); \ |
| } \ |
| } while (0) |
| |
| #endif /* _ASM_IA64_UNALIGNED_H */ |