50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
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/*
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* QEMU PowerPC helper routines for the device tree.
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*
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* Copyright (C) 2016 IBM Corp.
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*
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* This code is licensed under the GPL version 2 or later. See the
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* COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "target-ppc/cpu.h"
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#include "hw/ppc/fdt.h"
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#if defined(TARGET_PPC64)
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size_t ppc_create_page_sizes_prop(CPUPPCState *env, uint32_t *prop,
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size_t maxsize)
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{
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size_t maxcells = maxsize / sizeof(uint32_t);
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int i, j, count;
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uint32_t *p = prop;
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for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) {
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struct ppc_one_seg_page_size *sps = &env->sps.sps[i];
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if (!sps->page_shift) {
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break;
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}
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for (count = 0; count < PPC_PAGE_SIZES_MAX_SZ; count++) {
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if (sps->enc[count].page_shift == 0) {
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break;
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}
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}
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if ((p - prop) >= (maxcells - 3 - count * 2)) {
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break;
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}
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*(p++) = cpu_to_be32(sps->page_shift);
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*(p++) = cpu_to_be32(sps->slb_enc);
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*(p++) = cpu_to_be32(count);
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for (j = 0; j < count; j++) {
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*(p++) = cpu_to_be32(sps->enc[j].page_shift);
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*(p++) = cpu_to_be32(sps->enc[j].pte_enc);
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}
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}
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return (p - prop) * sizeof(uint32_t);
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}
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#endif
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