arch/ppc64/kernel/HvCall.c

   1 /*
   2  * HvCall.c
   3  * Copyright (C) 2001  Mike Corrigan IBM Corporation
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <asm/page.h>
  12 #include <asm/abs_addr.h>
  13 #include <asm/iSeries/HvCall.h>
  14 #include <asm/iSeries/HvCallSc.h>
  15 #include <asm/iSeries/HvTypes.h>
  16
  17
  18 void HvCall_writeLogBuffer(const void *buffer, u64 len)
  19 {
  20         struct HvLpBufferList hv_buf;
  21         u64 left_this_page;
  22         u64 cur = virt_to_abs(buffer);
  23
  24         while (len) {
  25                 hv_buf.addr = cur;
  26                 left_this_page = ((cur & PAGE_MASK) + PAGE_SIZE) - cur;
  27                 if (left_this_page > len)
  28                         left_this_page = len;
  29                 hv_buf.len = left_this_page;
  30                 len -= left_this_page;
  31                 HvCall2(HvCallBaseWriteLogBuffer,
  32                                 virt_to_abs(&hv_buf),
  33                                 left_this_page);
  34                 cur = (cur & PAGE_MASK) + PAGE_SIZE;
  35         }
  36 }