feat: dynamic boot medium probing and mounting

[lunaix-os.git] / lunaix-os / kernel / proc0.c

diff --git a/lunaix-os/kernel/proc0.c b/lunaix-os/kernel/proc0.c
index a2102aeca029313b203bc7360b65060874650571..c38ad2bc2517f340c5f55f2d8a84cd2a892a5d8f 100644 (file)
--- a/lunaix-os/kernel/proc0.c
+++ b/lunaix-os/kernel/proc0.c
@@ -1,21 +1,36 @@
-#include <arch/x86/boot/multiboot.h>
+#include <lunaix/block.h>

 #include <lunaix/common.h>
 #include <lunaix/common.h>

-#include <lunaix/lunistd.h>
+#include <lunaix/foptions.h>
+#include <lunaix/fs.h>
+#include <lunaix/fs/probe_boot.h>
+#include <lunaix/fs/twifs.h>
+#include <lunaix/ld.h>
+#include <lunaix/lxconsole.h>
+#include <lunaix/mm/cake.h>
+#include <lunaix/mm/pmm.h>
+#include <lunaix/mm/valloc.h>

 #include <lunaix/mm/vmm.h>
 #include <lunaix/peripheral/ps2kbd.h>
 #include <lunaix/mm/vmm.h>
 #include <lunaix/peripheral/ps2kbd.h>

+#include <lunaix/peripheral/serial.h>

 #include <lunaix/spike.h>
 #include <lunaix/syscall.h>
 #include <lunaix/syslog.h>
 #include <lunaix/spike.h>
 #include <lunaix/syscall.h>
 #include <lunaix/syslog.h>

-#include <stddef.h>
+#include <lunaix/types.h>
+
+#include <sdbg/protocol.h>

 
 #include <hal/acpi/acpi.h>
 
 #include <hal/acpi/acpi.h>

+#include <hal/ahci/ahci.h>

 #include <hal/apic.h>
 #include <hal/ioapic.h>
 #include <hal/apic.h>
 #include <hal/ioapic.h>

+#include <hal/pci.h>
+#include <hal/rtc.h>

 
 

-LOG_MODULE("PROC0")
+#include <arch/x86/boot/multiboot.h>
+
+#include <klibc/string.h>

 
 

-extern void
-_lxinit_main(); /* lxinit.c */
+LOG_MODULE("PROC0")

 
 void
 init_platform();
 
 void
 init_platform();


@@ -23,6 +38,67 @@ init_platform();
 void
 lock_reserved_memory();
 
 void
 lock_reserved_memory();
 

+void
+unlock_reserved_memory();
+
+void
+__do_reserved_memory(int unlock);
+
+int
+mount_bootmedium()
+{
+    struct v_dnode* dnode;
+    int errno = 0;
+    struct device* dev = probe_boot_medium();
+    if (!dev) {
+        kprintf(KERROR "fail to acquire device. (%d)", errno);
+        return 0;
+    }
+
+    if ((errno = vfs_mount("/mnt/lunaix-os", "iso9660", dev, 0))) {
+        kprintf(KERROR "fail to mount boot medium. (%d)", errno);
+        return 0;
+    }
+
+    return 1;
+}
+
+int
+exec_initd()
+{
+    int errno = 0;
+    struct ld_param param;
+    char filename[] = "/mnt/lunaix-os/usr/init";
+
+    ld_create_param(&param, __current, VMS_SELF);
+
+    if ((errno = exec_load_byname(&param, filename, NULL, NULL))) {
+        goto fail;
+    }
+
+    // user space
+    asm volatile("movw %0, %%ax\n"
+                 "movw %%ax, %%es\n"
+                 "movw %%ax, %%ds\n"
+                 "movw %%ax, %%fs\n"
+                 "movw %%ax, %%gs\n"
+                 "pushl %0\n"
+                 "pushl %1\n"
+                 "pushl %2\n"
+                 "pushl %3\n"
+                 "retf" ::"i"(UDATA_SEG),
+                 "r"(param.info.stack_top),
+                 "i"(UCODE_SEG),
+                 "r"(param.info.entry)
+                 : "eax", "memory");
+
+    fail("should not reach");
+
+fail:
+    kprintf(KERROR "fail to load initd. (%d)", errno);
+    return 0;
+}
+

 /**
  * @brief LunaixOS的零号进程，该进程永远为可执行。
  *
 /**
  * @brief LunaixOS的零号进程，该进程永远为可执行。
  *


@@ -35,11 +111,15 @@ void
 __proc0()
 {
     init_platform();
 __proc0()
 {
     init_platform();

-    if (!fork()) {
-        asm("jmp _lxinit_main");
-    }

 
 

-    asm("1: jmp 1b");
+    init_proc_user_space(__current);
+
+    if (!mount_bootmedium() || !exec_initd()) {
+        while (1) {
+            asm("hlt");
+        }
+        // should not reach
+    }

 }
 
 extern uint8_t __kernel_start;            /* link/linker.ld */
 }
 
 extern uint8_t __kernel_start;            /* link/linker.ld */


@@ -50,60 +130,109 @@ extern multiboot_info_t* _k_init_mb_info; /* k_init.c */
 void
 init_platform()
 {
 void
 init_platform()
 {

-    assert_msg(kalloc_init(), "Fail to initialize heap");
-
-    size_t hhk_init_pg_count = ((uintptr_t)(&__init_hhk_end)) >> PG_SIZE_BITS;
-    kprintf(KINFO "[MM] Releaseing %d pages from 0x0.\n", hhk_init_pg_count);
-
-    // Fuck it, I will no longer bother this little 1MiB
-    // I just release 4 pages for my APIC & IOAPIC remappings
-    for (size_t i = 0; i < 3; i++) {
-        vmm_unmap_page(KERNEL_PID, (void*)(i << PG_SIZE_BITS));
-    }
+    kprintf(KINFO "\033[11;0mLunaixOS (gcc v%s, %s)\033[39;49m\n",
+            __VERSION__,
+            __TIME__);

 
     // 锁定所有系统预留页（内存映射IO，ACPI之类的），并且进行1:1映射
     lock_reserved_memory();
 
 
     // 锁定所有系统预留页（内存映射IO，ACPI之类的），并且进行1:1映射
     lock_reserved_memory();
 

+    // firmware

     acpi_init(_k_init_mb_info);
     acpi_init(_k_init_mb_info);

-    uintptr_t ioapic_addr = acpi_get_context()->madt.ioapic->ioapic_addr;
-    pmm_mark_page_occupied(
-      KERNEL_PID, FLOOR(__APIC_BASE_PADDR, PG_SIZE_BITS), 0);
-    pmm_mark_page_occupied(KERNEL_PID, FLOOR(ioapic_addr, PG_SIZE_BITS), 0);
-
-    vmm_set_mapping(KERNEL_PID, APIC_BASE_VADDR, __APIC_BASE_PADDR, PG_PREM_RW);
-    vmm_set_mapping(KERNEL_PID, IOAPIC_BASE_VADDR, ioapic_addr, PG_PREM_RW);

 
 

+    // die

     apic_init();
     ioapic_init();
     apic_init();
     ioapic_init();

+
+    // debugger
+    serial_init();
+    sdbg_init();
+
+    // timers & clock
+    rtc_init();

     timer_init(SYS_TIMER_FREQUENCY_HZ);
     clock_init();
     timer_init(SYS_TIMER_FREQUENCY_HZ);
     clock_init();

+
+    // peripherals & chipset features

     ps2_kbd_init();
     ps2_kbd_init();

+    block_init();
+    ahci_init();
+
+    pci_init();

 
 

-    syscall_install();
+    // console
+    console_start_flushing();
+    console_flush();

 
 

-    for (size_t i = 256; i < hhk_init_pg_count; i++) {
-        vmm_unmap_page(KERNEL_PID, (void*)(i << PG_SIZE_BITS));
+    // expose cake allocator states to vfs
+    cake_export();
+
+    unlock_reserved_memory();
+
+    // clean up
+    for (size_t i = 0; i < (uintptr_t)(&__init_hhk_end); i += PG_SIZE) {
+        vmm_del_mapping(VMS_SELF, (void*)i);
+        pmm_free_page(KERNEL_PID, (void*)i);

     }
 }
 
 void
 lock_reserved_memory()
     }
 }
 
 void
 lock_reserved_memory()

+{
+    __do_reserved_memory(0);
+}
+
+void
+unlock_reserved_memory()
+{
+    __do_reserved_memory(1);
+}
+
+void
+__do_reserved_memory(int unlock)

 {
     multiboot_memory_map_t* mmaps = _k_init_mb_info->mmap_addr;
     size_t map_size =
       _k_init_mb_info->mmap_length / sizeof(multiboot_memory_map_t);
 {
     multiboot_memory_map_t* mmaps = _k_init_mb_info->mmap_addr;
     size_t map_size =
       _k_init_mb_info->mmap_length / sizeof(multiboot_memory_map_t);

+    // v_mapping mapping;

     for (unsigned int i = 0; i < map_size; i++) {
         multiboot_memory_map_t mmap = mmaps[i];
     for (unsigned int i = 0; i < map_size; i++) {
         multiboot_memory_map_t mmap = mmaps[i];

-        if (mmap.type == MULTIBOOT_MEMORY_AVAILABLE) {
+        uint8_t* pa = PG_ALIGN(mmap.addr_low);
+        if (mmap.type == MULTIBOOT_MEMORY_AVAILABLE || pa <= MEM_4MB) {
+            // Don't fuck up our kernel code or any free area!

             continue;
         }
             continue;
         }

-        uint8_t* pa = PG_ALIGN(mmap.addr_low);

         size_t pg_num = CEIL(mmap.len_low, PG_SIZE_BITS);
         size_t pg_num = CEIL(mmap.len_low, PG_SIZE_BITS);

-        for (size_t j = 0; j < pg_num; j++) {
-            vmm_set_mapping(KERNEL_PID,
-                            (pa + (j << PG_SIZE_BITS)),
-                            (pa + (j << PG_SIZE_BITS)),
-                            PG_PREM_R);
+        size_t j = 0;
+        if (!unlock) {
+            kprintf("mem: freeze: %p..%p type=%x\n",
+                    pa,
+                    pa + pg_num * PG_SIZE,
+                    mmap.type);
+            for (; j < pg_num; j++) {
+                uintptr_t _pa = pa + (j << PG_SIZE_BITS);
+                if (_pa >= KERNEL_MM_BASE) {
+                    // Don't fuck up our kernel space!
+                    break;
+                }
+                vmm_set_mapping(VMS_SELF, _pa, _pa, PG_PREM_R, VMAP_NULL);
+                pmm_mark_page_occupied(
+                  KERNEL_PID, _pa >> PG_SIZE_BITS, PP_FGLOCKED);
+            }
+            // Save the progress for later unmapping.
+            mmaps[i].len_low = j * PG_SIZE;
+        } else {
+            kprintf("mem: reclaim: %p..%p type=%x\n",
+                    pa,
+                    pa + pg_num * PG_SIZE,
+                    mmap.type);
+            for (; j < pg_num; j++) {
+                uintptr_t _pa = pa + (j << PG_SIZE_BITS);
+                vmm_del_mapping(VMS_SELF, _pa);
+                if (mmap.type == MULTIBOOT_MEMORY_ACPI_RECLAIMABLE) {
+                    pmm_mark_page_free(_pa >> PG_SIZE_BITS);
+                }
+            }

         }
     }
 }
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         }
     }
 }
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