qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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fdt.c (1340B)

      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