1 /* 2 * =========================================================================== 3 * CPU-version-specific defines 4 * =========================================================================== 5 */ 6 7 /* 8 * Macro for "LDR PC,xxx", which is not allowed pre-ARMv5. Essentially a 9 * one-way branch. 10 * 11 * May modify IP. Does not modify LR. 12 */ 13 .macro LDR_PC source 14 ldr ip, \source 15 bx ip 16 .endm 17 18 /* 19 * Macro for "MOV LR,PC / LDR PC,xxx", which is not allowed pre-ARMv5. 20 * Jump to subroutine. 21 * 22 * May modify IP and LR. 23 */ 24 .macro LDR_PC_LR source 25 ldr ip, \source 26 mov lr, pc 27 bx ip 28 .endm 29 30 /* 31 * Macro for "LDMFD SP!,{...regs...,PC}". 32 * 33 * May modify IP and LR. 34 */ 35 .macro LDMFD_PC regs 36 ldmfd sp!, {\regs,lr} 37 bx lr 38 .endm 39 40 /* 41 * Macro for data memory barrier; not meaningful pre-ARMv6K. 42 */ 43 .macro SMP_DMB 44 .endm 45
