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 13 #include "hw/ppc/fdt.h" 14 15 #if defined(TARGET_PPC64) 16 size_t ppc_create_page_sizes_prop(CPUPPCState *env, uint32_t *prop, 17 size_t maxsize) 18 { 19 size_t maxcells = maxsize / sizeof(uint32_t); 20 int i, j, count; 21 uint32_t *p = prop; 22 23 for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) { 24 struct ppc_one_seg_page_size *sps = &env->sps.sps[i]; 25 26 if (!sps->page_shift) { 27 break; 28 } 29 for (count = 0; count < PPC_PAGE_SIZES_MAX_SZ; count++) { 30 if (sps->enc[count].page_shift == 0) { 31 break; 32 } 33 } 34 if ((p - prop) >= (maxcells - 3 - count * 2)) { 35 break; 36 } 37 *(p++) = cpu_to_be32(sps->page_shift); 38 *(p++) = cpu_to_be32(sps->slb_enc); 39 *(p++) = cpu_to_be32(count); 40 for (j = 0; j < count; j++) { 41 *(p++) = cpu_to_be32(sps->enc[j].page_shift); 42 *(p++) = cpu_to_be32(sps->enc[j].pte_enc); 43 } 44 } 45 46 return (p - prop) * sizeof(uint32_t); 47 } 48 #endif 49