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/* SPDX-License-Identifier: GPL-3.0-or-later */
/* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
/**
* @file mem.c
* Generic memory handling, used both by physical and virtual memory.
*/
#include <apos/types.h>
#include <apos/mem.h>
#include <apos/vmem.h>
#include <libfdt.h>
size_t __mm_shifts[10];
size_t __mm_widths[10];
size_t __mm_sizes[10];
size_t __mm_page_shift;
size_t __mm_max_order;
void init_mem(size_t max_order, size_t bits[10], size_t page_shift)
{
__mm_max_order = max_order;
__mm_page_shift = page_shift;
__mm_shifts[0] = 0;
__mm_widths[0] = 1 << bits[0];
__mm_sizes[0] = 1 << __mm_page_shift;
for (size_t i = 1; i <= __mm_max_order; ++i) {
__mm_widths[i] = 1 << bits[i];
__mm_shifts[i] = __mm_shifts[i - 1] + bits[i - 1];
__mm_sizes[i] = 1UL << __mm_shifts[i] << __mm_page_shift;
}
}
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