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synced 2024-10-30 12:03:52 -04:00
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
#include "multiboot.h"
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#include "paging.h"
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#include <kernelmq/info.h>
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#include <kernelmq/stdlib.h>
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// Defined in linker script
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extern char _kernel_offset;
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extern char _kernel_size;
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extern char _kernel_phys_base;
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extern char _kernel_virt_base;
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extern char _kernel_stack_top;
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static struct KernelMQ_Info kinfo;
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const struct KernelMQ_Info *init(unsigned long multiboot_magic, unsigned long multiboot_info_addr)
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{
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if (multiboot_magic != MULTIBOOT_MAGIC) {
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return 0;
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}
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kmemset(&kinfo, 0, sizeof(struct KernelMQ_Info));
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if (!multiboot_parse(&kinfo, multiboot_info_addr)) {
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return 0;
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}
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kinfo.kernel_offset = (unsigned long)&_kernel_offset;
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kinfo.kernel_size = (unsigned long)&_kernel_size;
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kinfo.kernel_phys_base = (unsigned long)&_kernel_phys_base;
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kinfo.kernel_virt_base = (unsigned long)&_kernel_virt_base;
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kinfo.kernel_phys_limit = kinfo.kernel_phys_base + kinfo.kernel_size - 1;
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kinfo.kernel_virt_limit = kinfo.kernel_virt_base + kinfo.kernel_size - 1;
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kinfo.kernel_and_modules_total_size = kinfo.kernel_size + kinfo.modules_total_size;
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kinfo.kernel_stack_top = (unsigned long)&_kernel_stack_top;
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paging_clear();
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paging_identity();
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/* kinfo.freepde_start = */ paging_mapkernel(&kinfo);
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paging_load();
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paging_enable();
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return &kinfo;
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}
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