X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/bb793d5c6918efee6a86de442463a7c9aaa4ecdd..b91be0033265b5b6bd716bd39cb0971da41906c4:/lunaix-os/arch/i386/hhk.c?ds=sidebyside

diff --git a/lunaix-os/arch/i386/hhk.c b/lunaix-os/arch/i386/hhk.c
deleted file mode 100644
index 4250f79..0000000
--- a/lunaix-os/arch/i386/hhk.c
+++ /dev/null
@@ -1,148 +0,0 @@
-#include <arch/x86/boot/multiboot.h>
-#include <arch/x86/idt.h>
-#include <lunaix/common.h>
-#include <lunaix/mm/page.h>
-
-#define PT_ADDR(ptd, pt_index) ((ptd_t*)ptd + (pt_index + 1) * 1024)
-#define SET_PDE(ptd, pde_index, pde) *((ptd_t*)ptd + pde_index) = pde;
-#define SET_PTE(ptd, pt_index, pte_index, pte)                                 \
-    *(PT_ADDR(ptd, pt_index) + pte_index) = pte;
-#define sym_val(sym) (ptr_t)(&sym)
-
-#define KERNEL_PAGE_COUNT                                                      \
-    ((sym_val(__kernel_end) - sym_val(__kernel_start) + 0x1000 - 1) >> 12);
-#define HHK_PAGE_COUNT ((sym_val(__init_hhk_end) - 0x100000 + 0x1000 - 1) >> 12)
-
-// use table #1
-#define PG_TABLE_IDENTITY 0
-
-// use table #2-8
-// hence the max size of kernel is 8MiB
-#define PG_TABLE_KERNEL 1
-
-// use table #9
-#define PG_TABLE_STACK 8
-
-// Provided by linker (see linker.ld)
-extern u8_t __kernel_start;
-extern u8_t __kernel_end;
-extern u8_t __ktext_start;
-extern u8_t __ktext_end;
-
-extern u8_t __init_hhk_end;
-extern u8_t _k_stack;
-
-void
-_init_page(x86_page_table* ptd)
-{
-    ptd->entry[0] = NEW_L1_ENTRY(PG_PREM_RW, (ptd_t*)ptd + PG_MAX_ENTRIES);
-
-    // 对低1MiB空间进行对等映射（Identity
-    // mapping），也包括了我们的VGA，方便内核操作。
-    x86_page_table* id_pt =
-      (x86_page_table*)GET_PG_ADDR(ptd->entry[PG_TABLE_IDENTITY]);
-
-    for (u32_t i = 0; i < 256; i++) {
-        id_pt->entry[i] = NEW_L2_ENTRY(PG_PREM_RW, (i << PG_SIZE_BITS));
-    }
-
-    // 对等映射我们的hhk_init，这样一来，当分页与地址转换开启后，我们依然能够照常执行最终的
-    // jmp 指令来跳转至
-    //  内核的入口点
-    for (u32_t i = 0; i < HHK_PAGE_COUNT; i++) {
-        id_pt->entry[256 + i] =
-          NEW_L2_ENTRY(PG_PREM_RW, 0x100000 + (i << PG_SIZE_BITS));
-    }
-
-    // --- 将内核重映射至高半区 ---
-
-    // 这里是一些计算，主要是计算应当映射进的 页目录 与 页表 的条目索引（Entry
-    // Index）
-    u32_t kernel_pde_index = L1_INDEX(sym_val(__kernel_start));
-    u32_t kernel_pte_index = L2_INDEX(sym_val(__kernel_start));
-    u32_t kernel_pg_counts = KERNEL_PAGE_COUNT;
-
-    // 将内核所需要的页表注册进页目录
-    //  当然，就现在而言，我们的内核只占用不到50个页（每个页表包含1024个页）
-    //  这里分配了3个页表（12MiB），未雨绸缪。
-    for (u32_t i = 0; i < PG_TABLE_STACK - PG_TABLE_KERNEL; i++) {
-        ptd->entry[kernel_pde_index + i] =
-          NEW_L1_ENTRY(PG_PREM_RW, PT_ADDR(ptd, PG_TABLE_KERNEL + i));
-    }
-
-    // 首先，检查内核的大小是否可以fit进我们这几个表（12MiB）
-    if (kernel_pg_counts >
-        (PG_TABLE_STACK - PG_TABLE_KERNEL) * PG_MAX_ENTRIES) {
-        // ERROR: require more pages
-        //  here should do something else other than head into blocking
-        asm("ud2");
-    }
-
-    // 计算内核.text段的物理地址
-    ptr_t kernel_pm = V2P(&__kernel_start);
-    ptr_t ktext_start = V2P(&__ktext_start);
-    ptr_t ktext_end = V2P(&ktext_end);
-
-    // 重映射内核至高半区地址（>=0xC0000000）
-    for (u32_t i = 0; i < kernel_pg_counts; i++) {
-        ptr_t paddr = kernel_pm + (i << PG_SIZE_BITS);
-        u32_t flags = PG_PREM_RW;
-
-        if (paddr >= ktext_start && paddr <= ktext_end) {
-            flags = PG_PREM_R;
-        }
-
-        SET_PTE(ptd,
-                PG_TABLE_KERNEL,
-                kernel_pte_index + i,
-                NEW_L2_ENTRY(flags, paddr))
-    }
-
-    // 最后一个entry用于循环映射
-    ptd->entry[PG_MAX_ENTRIES - 1] = NEW_L1_ENTRY(T_SELF_REF_PERM, ptd);
-}
-
-u32_t
-__save_subset(u8_t* destination, u8_t* base, unsigned int size)
-{
-    unsigned int i = 0;
-    for (; i < size; i++) {
-        *(destination + i) = *(base + i);
-    }
-    return i;
-}
-
-void
-_save_multiboot_info(multiboot_info_t* info, u8_t* destination)
-{
-    u32_t current = 0;
-    u8_t* info_b = (u8_t*)info;
-    for (; current < sizeof(multiboot_info_t); current++) {
-        *(destination + current) = *(info_b + current);
-    }
-
-    ((multiboot_info_t*)destination)->mmap_addr = (ptr_t)destination + current;
-    current += __save_subset(
-      destination + current, (u8_t*)info->mmap_addr, info->mmap_length);
-
-    if (present(info->flags, MULTIBOOT_INFO_DRIVE_INFO)) {
-        ((multiboot_info_t*)destination)->drives_addr =
-          (ptr_t)destination + current;
-        current += __save_subset(
-          destination + current, (u8_t*)info->drives_addr, info->drives_length);
-    }
-}
-
-void
-_hhk_init(x86_page_table* ptd, u32_t kpg_size)
-{
-
-    // 初始化 kpg 全为0
-    //      P.s. 真没想到GRUB会在这里留下一堆垃圾！ 老子的页表全乱套了！
-    u8_t* kpg = (u8_t*)ptd;
-    for (u32_t i = 0; i < kpg_size; i++) {
-        *(kpg + i) = 0;
-    }
-
-    _init_page(ptd);
-}
\ No newline at end of file