Help with an MMIO register read function

[Carl Love]

I am trying to print the value of the debug bus signal routing
registers to debug a potential issue in the RTAS call.  There are a
number of MMIO addresses that I need to read and print.  I was given a
little code segment to start with (see the example in the code below).
Based on that I wrote a function to read the 64 bit MMIO registers.  The
issue that I have is the data is almost correct.  Here is the output:

Print the pass through registers
L2_debug_1 addr 0x500858, value = 600000000000000
CIU_DR1 addr 0x500958, value = 4
on_ramp_trace 0x509c98, value = 100000000
MBL Debug addr 0x50a010, value = 80000
SBI_PMCR (MFC0) 0x4003c8, value = 200000000
SBI_PMCR (MFC1) 0x4023c8, value = 200000000
SBI_PMCR (MFC2) 0x4043c8, value = 200000000
SBI_PMCR (MFC3) 0x4063c8, value = 200000000
SBI_PMCR (MFC4) 0x4083c8, value = 200000000
SBI_PMCR (MFC5) 0x40a3c8, value = 200000000
SBI_PMCR (MFC6) 0x40c3c8, value = 200000000
SBI_PMCR (MFC7) 0x40e3c8, value = 200000000

I expect the SBI values to be 0x2000000  not 0x200000000.  The L2 debug
value should be 0x6 not 0x600000000000000.  It seems like the bits are
there but shifted from where I would expect them to be.  Anyone have any
thoughts as to what is wrong? 

               Carl Love

static void dump_mmio_addr()
{
  // need to include io.h
  unsigned long *base;
  unsigned long temp1;
  unsigned offset;
  struct device_node *node;
  void __iomem *tmcu_regs;

  //  Example
  //  node = of_find_node_by_type(NULL, "cpu");
  //  base = (unsigned long *) get_property(node, "bp-base", NULL);
  //  tmcu_regs = ioremap(*base+0x509800, 0xB000);
  //  temp1 = readq(tmcu_regs + 0x0);


  printk("Print the pass through registers\n");

  node = of_find_node_by_type(NULL, "cpu");
  base = (unsigned long *) get_property(node, "bp-base", NULL);

  offset = 0x500858;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("L2_debug_1 addr 0x%x, value = %lx\n", offset, temp1);

  offset = 0x500958;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("CIU_DR1 addr 0x%x, value = %lx\n", offset, temp1);

  offset = 0x509c98;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("on_ramp_trace 0x%x, value = %lx\n", offset, temp1);

  offset = 0x50A010;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("MBL Debug addr 0x%x, value = %lx\n", offset, temp1);

  offset = 0x4003c8;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("SBI_PMCR (MFC0) 0x%x, value = %lx\n", offset, temp1);


  offset = 0x4023c8;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("SBI_PMCR (MFC1) 0x%x, value = %lx\n", offset, temp1);

  offset = 0x4043c8;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("SBI_PMCR (MFC2) 0x%x, value = %lx\n", offset, temp1);

  offset = 0x4063c8;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("SBI_PMCR (MFC3) 0x%x, value = %lx\n", offset, temp1);

  offset = 0x4083c8;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("SBI_PMCR (MFC4) 0x%x, value = %lx\n", offset, temp1);

  offset = 0x40A3c8;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("SBI_PMCR (MFC5) 0x%x, value = %lx\n", offset, temp1);

  offset = 0x40C3c8;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("SBI_PMCR (MFC6) 0x%x, value = %lx\n", offset, temp1);

  offset = 0x40E3c8;
  tmcu_regs = ioremap(*base+offset, 0xB000);
  temp1 = readq(tmcu_regs + 0x0);
  printk("SBI_PMCR (MFC7) 0x%x, value = %lx\n", offset, temp1);

}