LXR qemu/hw/ppc/fdt.c

   1/*
   2 * QEMU PowerPC helper routines for the device tree.
   3 *
   4 * Copyright (C) 2016 IBM Corp.
   5 *
   6 * This code is licensed under the GPL version 2 or later. See the
   7 * COPYING file in the top-level directory.
   8 */
   9
  10#include "qemu/osdep.h"
  11#include "target/ppc/cpu.h"
  12#include "target/ppc/mmu-hash64.h"
  13
  14#include "hw/ppc/fdt.h"
  15
  16#if defined(TARGET_PPC64)
  17size_t ppc_create_page_sizes_prop(PowerPCCPU *cpu, uint32_t *prop,
  18                                  size_t maxsize)
  19{
  20    size_t maxcells = maxsize / sizeof(uint32_t);
  21    int i, j, count;
  22    uint32_t *p = prop;
  23
  24    for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) {
  25        PPCHash64SegmentPageSizes *sps = &cpu->hash64_opts->sps[i];
  26
  27        if (!sps->page_shift) {
  28            break;
  29        }
  30        for (count = 0; count < PPC_PAGE_SIZES_MAX_SZ; count++) {
  31            if (sps->enc[count].page_shift == 0) {
  32                break;
  33            }
  34        }
  35        if ((p - prop) >= (maxcells - 3 - count * 2)) {
  36            break;
  37        }
  38        *(p++) = cpu_to_be32(sps->page_shift);
  39        *(p++) = cpu_to_be32(sps->slb_enc);
  40        *(p++) = cpu_to_be32(count);
  41        for (j = 0; j < count; j++) {
  42            *(p++) = cpu_to_be32(sps->enc[j].page_shift);
  43            *(p++) = cpu_to_be32(sps->enc[j].pte_enc);
  44        }
  45    }
  46
  47    return (p - prop) * sizeof(uint32_t);
  48}
  49#endif
  50