I am reading the boot code in arch/powerpc/kernel/head_fsl_booke.S for MPC8572( dual e500 core). The second core will encounter the following code:
319 #ifdef CONFIG_SMP 320 /* Check to see if we're the second processor, and jump 321 * to the secondary_start code if so 322 */ 323 mfspr r24,SPRN_PIR 324 cmpwi r24,0 325 bne __secondary_start 326 #endif And jump to __secondary_start -> call_setup_cpu, source code in call_setup_cpu as the following: 112 _GLOBAL(call_setup_cpu) 113 addis r4,r3,[EMAIL PROTECTED] 114 addi r4,r4,[EMAIL PROTECTED] 115 lwz r4,0(r4) 116 add r4,r4,r3 117 lwz r5,CPU_SPEC_SETUP(r4) 118 cmpwi 0,r5,0 119 add r5,r5,r3 120 beqlr 121 mtctr r5 122 bctr here it seems cur_cpu_spec here is not a valid value since cur_cpu_spec will only be set in identify_cpu() [ arch/powerpc/kernel/cputable.c: 1301] later. So what is my mistake? Who responsible for initialize cur_cpu_spec variable for second core?? Thanks MK -- www.skyeye.org _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
