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36 lines
1.4 KiB
C
36 lines
1.4 KiB
C
// Copyright (c) 2023-2026 Chris (boreddevnl)
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// This software is released under the GNU General Public License v3.0. See LICENSE file for details.
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// This header needs to maintain in any file it is present in, as per the GPL license terms.
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#include <stdint.h>
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#include "limine.h"
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#include <stddef.h>
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static volatile struct limine_hhdm_request hhdm_request __attribute__((used, section(".requests"))) = {
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.id = LIMINE_HHDM_REQUEST,
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.revision = 0,
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.response = NULL
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};
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static volatile struct limine_kernel_address_request kernel_addr_request __attribute__((used, section(".requests"))) = {
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.id = LIMINE_KERNEL_ADDRESS_REQUEST,
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.revision = 0,
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.response = NULL
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};
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uint64_t hhdm_offset = 0;
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uint64_t kernel_phys_base = 0;
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uint64_t kernel_virt_base = 0;
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void platform_init(void) {
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if (hhdm_request.response) { hhdm_offset = hhdm_request.response->offset; }
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if (kernel_addr_request.response) {
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kernel_phys_base = kernel_addr_request.response->physical_base;
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kernel_virt_base = kernel_addr_request.response->virtual_base;
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}
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}
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uint64_t p2v(uint64_t phys) { return phys + hhdm_offset; }
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uint64_t v2p(uint64_t virt) {
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if (kernel_virt_base && virt >= kernel_virt_base) {
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return virt - kernel_virt_base + kernel_phys_base;
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}
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if (hhdm_offset && virt >= hhdm_offset) {
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return virt - hhdm_offset;
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}
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return virt;
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}
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