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41 /*****************************************************************************/
44 * @file xpseudo_asm_gcc.h
46 * This header file contains macros for using inline assembler code. It is
47 * written specifically for the GNU compiler.
50 * MODIFICATION HISTORY:
52 * Ver Who Date Changes
53 * ----- -------- -------- -----------------------------------------------
54 * 1.00a ecm/sdm 10/28/09 First release
57 ******************************************************************************/
59 #ifndef XPSEUDO_ASM_GCC_H /* prevent circular inclusions */
60 #define XPSEUDO_ASM_GCC_H /* by using protection macros */
62 /***************************** Include Files ********************************/
66 #endif /* __cplusplus */
68 /************************** Constant Definitions ****************************/
70 /**************************** Type Definitions ******************************/
72 /***************** Macros (Inline Functions) Definitions ********************/
74 /* necessary for pre-processor */
75 #define stringify(s) tostring(s)
76 #define tostring(s) #s
78 /* pseudo assembler instructions */
79 #define mfcpsr() ({unsigned int rval; \
80 __asm__ __volatile__(\
87 #define mtcpsr(v) __asm__ __volatile__(\
92 #define cpsiei() __asm__ __volatile__("cpsie i\n")
93 #define cpsidi() __asm__ __volatile__("cpsid i\n")
95 #define cpsief() __asm__ __volatile__("cpsie f\n")
96 #define cpsidf() __asm__ __volatile__("cpsid f\n")
100 #define mtgpr(rn, v) __asm__ __volatile__(\
101 "mov r" stringify(rn) ", %0 \n"\
105 #define mfgpr(rn) ({unsigned int rval; \
106 __asm__ __volatile__(\
107 "mov %0,r" stringify(rn) "\n"\
113 /* memory synchronization operations */
115 /* Instruction Synchronization Barrier */
116 #define isb() __asm__ __volatile__ ("isb" : : : "memory")
118 /* Data Synchronization Barrier */
119 #define dsb() __asm__ __volatile__ ("dsb" : : : "memory")
121 /* Data Memory Barrier */
122 #define dmb() __asm__ __volatile__ ("dmb" : : : "memory")
125 /* Memory Operations */
126 #define ldr(adr) ({unsigned long rval; \
127 __asm__ __volatile__(\
129 : "=r" (rval) : "r" (adr)\
134 #define ldrb(adr) ({unsigned char rval; \
135 __asm__ __volatile__(\
137 : "=r" (rval) : "r" (adr)\
142 #define str(adr, val) __asm__ __volatile__(\
144 : : "r" (val), "r" (adr)\
147 #define strb(adr, val) __asm__ __volatile__(\
149 : : "r" (val), "r" (adr)\
152 /* Count leading zeroes (clz) */
153 #define clz(arg) ({unsigned char rval; \
154 __asm__ __volatile__(\
156 : "=r" (rval) : "r" (arg)\
161 /* CP15 operations */
162 #define mtcp(rn, v) __asm__ __volatile__(\
167 #define mfcp(rn) ({unsigned int rval; \
168 __asm__ __volatile__(\
175 /************************** Variable Definitions ****************************/
177 /************************** Function Prototypes *****************************/
181 #endif /* __cplusplus */
183 #endif /* XPSEUDO_ASM_GCC_H */