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) |
17 | size_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 | |