#include <stdint.h>
-
-#include <lunaix/constants.h>
-#include <lunaix/tty/tty.h>
-
-#include <lunaix/mm/page.h>
-#include <lunaix/mm/pmm.h>
#include <lunaix/mm/vmm.h>
-
+#include <lunaix/mm/kalloc.h>
#include <hal/cpu.h>
-
-#include <arch/x86/boot/multiboot.h>
-#include <arch/x86/gdt.h>
-#include <arch/x86/idt.h>
-
#include <libc/stdio.h>
+#include <lunaix/spike.h>
-extern void __kernel_start;
-extern void __kernel_end;
-extern void __init_hhk_end;
+extern uint8_t __kernel_start;
void
-_kernel_init(multiboot_info_t* mb_info)
+_kernel_main()
{
- _init_idt();
-
- multiboot_memory_map_t* map = (multiboot_memory_map_t*)mb_info->mmap_addr;
-
- // TODO: 内核初始化
- // (v) 根据memory map初始化内存管理器
- // (v) 分配新的栈空间
- // 调整映射：
- // ( ) + 映射 memory map （APCI，APIC，IO映射） （以后）
- // (v) + 释放 hhk_init 所占据的空间
-
- // 初始化物理内存管理器
- pmm_init(MEM_1MB + mb_info->mem_upper << 10);
- vmm_init();
- tty_init(VGA_BUFFER_PADDR);
-
- tty_set_theme(VGA_COLOR_GREEN, VGA_COLOR_BLACK);
-
- printf("[KERNEL] Initializing Memory ...\n");
- unsigned int map_size =
- mb_info->mmap_length / sizeof(multiboot_memory_map_t);
- printf("[MM] Mem: %d KiB, Extended Mem: %d KiB\n",
- mb_info->mem_lower,
- mb_info->mem_upper);
-
- // 按照 Memory map 标识可用的物理页
- for (unsigned int i = 0; i < map_size; i++) {
- multiboot_memory_map_t mmap = map[i];
- printf("[MM] Base: 0x%x, len: %u KiB, type: %u\n",
- map[i].addr_low,
- map[i].len_low >> 10,
- map[i].type);
- if (mmap.type == MULTIBOOT_MEMORY_AVAILABLE) {
- // 整数向上取整除法
- uintptr_t pg = map[i].addr_low + 0x0fffU;
- pmm_mark_chunk_free(pg >> 12, map[i].len_low >> 12);
- printf("[MM] Freed %u pages start from 0x%x\n",
- map[i].len_low >> 12,
- pg & ~0x0fffU);
- }
- }
-
- // 将内核占据的页设为已占用
- size_t pg_count = (uintptr_t)(&__kernel_end - &__kernel_start) >> 12;
- pmm_mark_chunk_occupied(V2P(&__kernel_start) >> 12, pg_count);
- printf("[MM] Allocated %d pages for kernel.\n", pg_count);
-
-
- size_t hhk_init_pg_count = ((uintptr_t)(&__init_hhk_end)) >> 12;
- printf("[MM] Releaseing %d pages from 0x0.\n", hhk_init_pg_count);
+ char buf[64];
+
+ printf("Hello higher half kernel world!\nWe are now running in virtual "
+ "address space!\n\n");
+
+ cpu_get_brand(buf);
+ printf("CPU: %s\n\n", buf);
- // 清除 hhk_init 与前1MiB的映射
- // 从这里开始，到新的vga缓存地址设置前，不能够进行任何的打印操作
- for (size_t i = 0; i < hhk_init_pg_count; i++) {
- vmm_unmap_page((i << 12));
- }
+ void* k_start = vmm_v2p(&__kernel_start);
+ printf("The kernel's base address mapping: %p->%p\n", &__kernel_start, k_start);
- size_t vga_buf_pgs = VGA_BUFFER_SIZE >> 12;
+ // test malloc & free
- // 首先，标记VGA部分为已占用
- pmm_mark_chunk_occupied(VGA_BUFFER_PADDR >> 12, vga_buf_pgs);
+ uint8_t** arr = (uint8_t**) lxmalloc(10 * sizeof(uint8_t*));
- // 重映射VGA文本缓冲区（以后会变成显存，i.e., framebuffer）
- for (size_t i = 0; i < vga_buf_pgs; i++)
+ for (size_t i = 0; i < 10; i++)
{
- vmm_map_page(VGA_BUFFER_VADDR + (i << 12), VGA_BUFFER_PADDR + (i << 12), PG_PREM_RW, PG_PREM_RW);
+ arr[i] = (uint8_t*) lxmalloc((i + 1) * 2);
}
-
- // 更新VGA缓冲区位置至虚拟地址
- tty_set_buffer(VGA_BUFFER_VADDR);
- printf("[MM] Mapped VGA to %p.\n", VGA_BUFFER_VADDR);
- // 为内核创建一个专属栈空间。
- for (size_t i = 0; i < (K_STACK_SIZE >> 12); i++) {
- vmm_alloc_page(K_STACK_START + (i << 12), PG_PREM_RW, PG_PREM_RW);
+ for (size_t i = 0; i < 10; i++)
+ {
+ lxfree(arr[i]);
}
- printf("[MM] Allocated %d pages for stack start at %p\n", K_STACK_SIZE>>12, K_STACK_START);
- printf("[KERNEL] Done!\n\n");
-}
+ uint8_t* big_ = lxmalloc(8192);
+ big_[0] = 123;
+ big_[1] = 23;
+ big_[2] = 3;
-void
-_kernel_main()
-{
- char* buf[64];
+ printf("%u, %u, %u", big_[0], big_[1], big_[2]);
- printf("Hello higher half kernel world!\nWe are now running in virtual "
- "address space!\n\n");
-
- cpu_get_brand(buf);
- printf("CPU: %s\n\n", buf);
+ // good free
+ lxfree(arr);
+ lxfree(big_);
- uintptr_t k_start = vmm_v2p(&__kernel_start);
- printf("The kernel's base address mapping: %p->%p\n", &__kernel_start, k_start);
- // __asm__("int $0\n");
+ // uint8_t* bad1 = lxmalloc(123);
+ // void* bad2 = lxmalloc(1);
+
+ // *((uint32_t*)(bad1 - 4)) = 0xc2343312UL;
+
+ // // bad free
+ // lxfree(bad1);
+ // lxfree(bad2 - 2);
}
\ No newline at end of file
git://scm.lunaixsky.com / lunaix-os.git / blobdiff