60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
#include "mango/types.h"
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#include <mango/memblock.h>
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#include <mango/printk.h>
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#include <mango/util.h>
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#include <arch/e820.h>
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void e820_scan(multiboot_memory_map_t *mmap, size_t len)
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{
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size_t mem_total = 0, mem_reserved = 0;
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multiboot_memory_map_t *entry = NULL;
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for (size_t i = 0; i < len; i += sizeof *entry) {
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entry = (void *)((char *)mmap + i);
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int reserved = 1;
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const char *type = "unknown";
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switch (entry->type) {
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case MULTIBOOT_MEMORY_AVAILABLE:
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type = "available";
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reserved = 0;
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break;
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case MULTIBOOT_MEMORY_RESERVED:
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type = "reserved";
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break;
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case MULTIBOOT_MEMORY_ACPI_RECLAIMABLE:
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type = "acpi";
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break;
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case MULTIBOOT_MEMORY_NVS:
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type = "nvs";
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break;
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case MULTIBOOT_MEMORY_BADRAM:
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type = "bad";
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break;
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default:
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break;
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}
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printk("e820: [mem 0x%016llx-0x%016llx] %s",
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entry->addr, entry->addr + entry->len - 1, type);
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memblock_add(entry->addr, entry->len);
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if (reserved) {
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memblock_reserve(entry->addr, entry->len);
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mem_reserved += entry->len;
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}
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mem_total += entry->len;
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}
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/* reserve a page at 0x8000 for use by the ACPI AP trampoline code */
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memblock_reserve(0x8000, 0x1000);
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char str_mem_total[64], str_mem_reserved[64];
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data_size_to_string(mem_total, str_mem_total, sizeof str_mem_total);
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data_size_to_string(mem_reserved, str_mem_reserved, sizeof str_mem_reserved);
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printk("e820: total memory: %s, hw reserved: %s", str_mem_total, str_mem_reserved);
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}
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