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<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>Hi,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>I am a newbie to uboot and I am trying
to port uboot onto a Rattler board (MPC8280). <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>I am using Wiretap CCS to debug the
uboot.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>After I run the code, it always gets a
system reset (found by attaching the wiretap). The cause of this system reset
is the following:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>
“‘gd->dp_alloc_base = CPM_DATAONLY_BASE;”. This is the
line 1 in commproc.c, after executing this line, uboot gets a system reset
. <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>For your reference I am attaching the
complete code of m8260_cpm_reset() function:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>cpu/mpc8260/commproc.c<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>m8260_cpm_reset(void)<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>{<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'> DECLARE_GLOBAL_DATA_PTR;<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'> volatile
immap_t *immr = (immap_t *)CFG_IMMR;<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'> volatile
ulong count;<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'> /*
Reclaim the DP memory for our use.
*/<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><b><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399;font-weight:bold'>1</span></font></b><font
color="#333399"><span style='color:#333399'> gd->dp_alloc_base
= CPM_DATAONLY_BASE;<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><b><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399;font-weight:bold'>2</span></font></b><font
color="#333399"><span style='color:#333399'> gd->dp_alloc_top
= gd->dp_alloc_base + CPM_DATAONLY_SIZE;<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'> /*
Reset CPM
*/<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><b><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399;font-weight:bold'>3</span></font></b><font
color="#333399"><span style='color:#333399'> immr->im_cpm.cp_cpcr
= CPM_CR_RST;<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>…<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>}<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>IMMR address for the Rattler board is
0xFF000000.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>CPM_DATAONLY_BASE is 128 (in
cpm_8260.h).<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>CPM_DATAONLY_SIZE is (8 * 1024) -
CPM_DATAONLY_BASE (in cpm_8260.h).<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>CPM_CR_RST is 0x80000000 (in cpm_8260.h).<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>Regards,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'>Ajit Kumar<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color="#333399" face="Courier New"><span
style='font-size:10.0pt;color:#333399'><o:p> </o:p></span></font></p>
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