release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/platforms/iseries/hvlog.c

   1 /*
   2  * Copyright (C) 2001  Mike Corrigan IBM Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  */
   9
  10 #include <asm/page.h>
  11 #include <asm/abs_addr.h>
  12 #include <asm/iseries/hv_call.h>
  13 #include <asm/iseries/hv_call_sc.h>
  14 #include <asm/iseries/hv_types.h>
  15
  16
  17 void HvCall_writeLogBuffer(const void *buffer, u64 len)
  18 {
  19         struct HvLpBufferList hv_buf;
  20         u64 left_this_page;
  21         u64 cur = virt_to_abs(buffer);
  22
  23         while (len) {
  24                 hv_buf.addr = cur;
  25                 left_this_page = ((cur & HW_PAGE_MASK) + HW_PAGE_SIZE) - cur;
  26                 if (left_this_page > len)
  27                         left_this_page = len;
  28                 hv_buf.len = left_this_page;
  29                 len -= left_this_page;
  30                 HvCall2(HvCallBaseWriteLogBuffer,
  31                                 virt_to_abs(&hv_buf),
  32                                 left_this_page);
  33                 cur = (cur & HW_PAGE_MASK) + HW_PAGE_SIZE;
  34         }
  35 }