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Cédric Le Goater3654fa92016-08-02 19:38:01 +02001/*
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"
Thomas Huthfcf5ef22016-10-11 08:56:52 +020011#include "target/ppc/cpu.h"
David Gibsonb07c59f2018-03-23 13:31:52 +110012#include "target/ppc/mmu-hash64.h"
Cédric Le Goater3654fa92016-08-02 19:38:01 +020013
14#include "hw/ppc/fdt.h"
15
16#if defined(TARGET_PPC64)
David Gibson644a2c92018-03-22 16:18:40 +110017size_t ppc_create_page_sizes_prop(PowerPCCPU *cpu, uint32_t *prop,
18 size_t maxsize)
Cédric Le Goater3654fa92016-08-02 19:38:01 +020019{
Cédric Le Goater3654fa92016-08-02 19:38:01 +020020 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++) {
David Gibsonb07c59f2018-03-23 13:31:52 +110025 PPCHash64SegmentPageSizes *sps = &cpu->hash64_opts->sps[i];
Cédric Le Goater3654fa92016-08-02 19:38:01 +020026
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