1*4882a593Smuzhiyun #ifndef _LINUX_UNALIGNED_GENERIC_H 2*4882a593Smuzhiyun #define _LINUX_UNALIGNED_GENERIC_H 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun /* 5*4882a593Smuzhiyun * Cause a link-time error if we try an unaligned access other than 6*4882a593Smuzhiyun * 1,2,4 or 8 bytes long 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun extern void __bad_unaligned_access_size(void); 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \ 11*4882a593Smuzhiyun __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \ 12*4882a593Smuzhiyun __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \ 13*4882a593Smuzhiyun __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \ 14*4882a593Smuzhiyun __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \ 15*4882a593Smuzhiyun __bad_unaligned_access_size())))); \ 16*4882a593Smuzhiyun })) 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \ 19*4882a593Smuzhiyun __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \ 20*4882a593Smuzhiyun __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \ 21*4882a593Smuzhiyun __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \ 22*4882a593Smuzhiyun __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \ 23*4882a593Smuzhiyun __bad_unaligned_access_size())))); \ 24*4882a593Smuzhiyun })) 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #define __put_unaligned_le(val, ptr) ({ \ 27*4882a593Smuzhiyun void *__gu_p = (ptr); \ 28*4882a593Smuzhiyun switch (sizeof(*(ptr))) { \ 29*4882a593Smuzhiyun case 1: \ 30*4882a593Smuzhiyun *(u8 *)__gu_p = (__force u8)(val); \ 31*4882a593Smuzhiyun break; \ 32*4882a593Smuzhiyun case 2: \ 33*4882a593Smuzhiyun put_unaligned_le16((__force u16)(val), __gu_p); \ 34*4882a593Smuzhiyun break; \ 35*4882a593Smuzhiyun case 4: \ 36*4882a593Smuzhiyun put_unaligned_le32((__force u32)(val), __gu_p); \ 37*4882a593Smuzhiyun break; \ 38*4882a593Smuzhiyun case 8: \ 39*4882a593Smuzhiyun put_unaligned_le64((__force u64)(val), __gu_p); \ 40*4882a593Smuzhiyun break; \ 41*4882a593Smuzhiyun default: \ 42*4882a593Smuzhiyun __bad_unaligned_access_size(); \ 43*4882a593Smuzhiyun break; \ 44*4882a593Smuzhiyun } \ 45*4882a593Smuzhiyun (void)0; }) 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun #define __put_unaligned_be(val, ptr) ({ \ 48*4882a593Smuzhiyun void *__gu_p = (ptr); \ 49*4882a593Smuzhiyun switch (sizeof(*(ptr))) { \ 50*4882a593Smuzhiyun case 1: \ 51*4882a593Smuzhiyun *(u8 *)__gu_p = (__force u8)(val); \ 52*4882a593Smuzhiyun break; \ 53*4882a593Smuzhiyun case 2: \ 54*4882a593Smuzhiyun put_unaligned_be16((__force u16)(val), __gu_p); \ 55*4882a593Smuzhiyun break; \ 56*4882a593Smuzhiyun case 4: \ 57*4882a593Smuzhiyun put_unaligned_be32((__force u32)(val), __gu_p); \ 58*4882a593Smuzhiyun break; \ 59*4882a593Smuzhiyun case 8: \ 60*4882a593Smuzhiyun put_unaligned_be64((__force u64)(val), __gu_p); \ 61*4882a593Smuzhiyun break; \ 62*4882a593Smuzhiyun default: \ 63*4882a593Smuzhiyun __bad_unaligned_access_size(); \ 64*4882a593Smuzhiyun break; \ 65*4882a593Smuzhiyun } \ 66*4882a593Smuzhiyun (void)0; }) 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun #endif /* _LINUX_UNALIGNED_GENERIC_H */ 69