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From: "poorbeyond" <poorbeyond@163.com>
To: "Linux-ppc mail list" <linuxppc-embedded@ozlabs.org>
Subject: a question about mpc8xx linux
Date: Fri, 27 Jul 2007 21:11:19 +0800	[thread overview]
Message-ID: <200707272111187341027@163.com> (raw)

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my cpu is MPC860, use u-boot-1.1.4, linux-2.6.20.14

i use the "tftp 300000 uImage" command download kernel image,

then use the "bootm 300000" command boot the image.


i found the bootm cmd entered the /arch/ppc/kernel/head_8xx.s, stop at the instruction "rfi".
is it right? after the instruction, where does the code go normally ? what should i do now?

thanks

 .globl __start
__start:
 mr r31,r3   /* save parameters */
 mr r30,r4
 mr r29,r5
 mr r28,r6
 mr r27,r7

 /* We have to turn on the MMU right away so we get cache modes
  * set correctly.
  */
 bl initial_mmu

/* We now have the lower 8 Meg mapped into TLB entries, and the caches
 * ready to work.
 */

turn_on_mmu:
 mfmsr r0
 ori r0,r0,MSR_DR|MSR_IR
 mtspr SPRN_SRR1,r0
 lis r0,start_here@h
 ori r0,r0,start_here@l
 mtspr SPRN_SRR0,r0
 SYNC
 rfi    /* enables MMU */







poorbeyond
2007-07-27

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             reply	other threads:[~2007-07-27 13:11 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-07-27 13:11 poorbeyond [this message]
2007-07-27 17:53 ` a question about mpc8xx linux Scott Wood
2007-07-27 17:56   ` Scott Wood
2007-08-01 14:48 ` Barisa kisku

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