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2.6. 异常中断处理<br />
/*<br />
*********************************************************************<br />
****<br />
*<br />
* Interrupt handling<br />
*<br />
*********************************************************************<br />
****<br />
@<br />
*/<br />
@ IRQ stack frame.<br />
@<br />
#define S_FRAME_SIZE 72<br />
#define S_OLD_R0 68<br />
#define S_PSR 64<br />
#define S_PC 60<br />
#define S_LR 56<br />
#define S_SP 52<br />
#define S_IP 48<br />
#define S_FP 44<br />
#define S_R10 40<br />
#define S_R9 36<br />
#define S_R8 32<br />
#define S_R7 28<br />
#define S_R6 24<br />
#define S_R5 20<br />
#define S_R4 16<br />
#define S_R3 12<br />
#define S_R2 8<br />
#define S_R1 4<br />
#define S_R0 0<br />
#define MODE_SVC 0x13<br />
#define I_BIT 0x80<br />
此处很简单,只是一些宏定义而已。<br />
后面用到的时候再解释。