X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fthreads%2Finit.c;h=81188e950c6e8825052c18003d3eeea761ae1435;hb=5c9e01777f46b56b671671ef3d305148f1aa0460;hp=f7702cd365e423ed44ff0ed2221c26c59bd687cc;hpb=8ca3547f6c4d6d01a76d3ce642a0c1bf884c4c2a;p=pintos-anon

diff --git a/src/threads/init.c b/src/threads/init.c
index f7702cd..81188e9 100644
--- a/src/threads/init.c
+++ b/src/threads/init.c
@@ -18,6 +18,7 @@
 #include "vga.h"
 #ifdef FILESYS
 #include "filesys.h"
+#include "disk.h"
 #endif
 
 /* Size of kernel static code and data, in 4 kB pages. */
@@ -32,6 +33,17 @@ void power_off (void);
 static void
 main_thread (void *aux UNUSED) 
 {
+  struct disk *hda;
+  disk_init ();
+  hda = disk_get (1);
+  if (hda != NULL) 
+    {
+      char buf[DISK_SECTOR_SIZE];
+      disk_read (hda, 0, buf);
+      //hex_dump (buf, sizeof buf);
+    }
+  else
+    printk ("no hda\n");
   thread_execute ("a.out");
 }
 
@@ -44,21 +56,21 @@ main (void)
   /* Clear out the BSS segment. */
   memset (&__bss_start, 0, &_end - &__bss_start);
 
+  /* Initialize components needed by printk() very early. */
   vga_init ();
   serial_init ();
+  printk ("Booting cnachos86...\n");
 
   /* Calculate how much RAM the kernel uses, and find out from
      the bootloader how much RAM this machine has. */
   kernel_pages = (&_end - &_text + 4095) / 4096;
-  ram_pages = *(uint32_t *) (0x7e00 - 8);
-
-  printk ("Initializing nachos-x86, %d kB RAM detected.\n",
-          ram_pages * 4);
+  ram_pages = *(uint32_t *) (0x7e00 - 6);
+  printk ("ram: detected %'d kB main memory.\n", ram_pages * 4);
 
   /* Memory from the end of the kernel through the end of memory
      is free.  Give it to the page allocator. */
-  palloc_init ((void *) (KERN_BASE + kernel_pages * NBPG),
-               (void *) (PHYS_BASE + ram_pages * NBPG));
+  palloc_init ((void *) (KERN_BASE + kernel_pages * PGSIZE),
+               (void *) (PHYS_BASE + ram_pages * PGSIZE));
   paging_init ();
   gdt_init ();
 
@@ -71,7 +83,6 @@ main (void)
 
 #ifdef FILESYS
   filesys_init (false);
-  filesys_self_test ();
 #endif
 
   thread_init ();
@@ -94,13 +105,13 @@ make_seg_desc (uint32_t base,
   uint32_t e0 = ((limit & 0xffff)             /* Limit 15:0. */
                  | (base << 16));             /* Base 15:0. */
   uint32_t e1 = (((base >> 16) & 0xff)        /* Base 23:16. */
-                 | ( system << 12)  /* 0=system, 1=code/data. */
-                 | ( type << 8)     /* Segment type. */
+                 | (system << 12)             /* 0=system, 1=code/data. */
+                 | (type << 8)                /* Segment type. */
                  | (dpl << 13)                /* Descriptor privilege. */
                  | (1 << 15)                  /* Present. */
                  | (limit & 0xf0000)          /* Limit 16:19. */
                  | (1 << 22)                  /* 32-bit segment. */
-                 | ( granularity << 23) /* Byte/page granularity. */
+                 | (granularity << 23)        /* Byte/page granularity. */
                  | (base & 0xff000000));      /* Base 31:24. */
   return e0 | ((uint64_t) e1 << 32);
 }
@@ -120,9 +131,10 @@ make_data_desc (int dpl)
 }
 
 static uint64_t
-make_tss_desc (uint32_t base)
+make_tss_desc (void *vaddr)
 {
-  return make_seg_desc (base, 0x67, SYS_SYSTEM, TYPE_TSS_32_A, 0, GRAN_BYTE);
+  return make_seg_desc ((uint32_t) vaddr,
+                        0x67, SYS_SYSTEM, TYPE_TSS_32_A, 0, GRAN_BYTE);
 }
 
 uint64_t gdt[SEL_CNT];
@@ -150,7 +162,7 @@ gdt_init (void)
   gdt[SEL_KDSEG / sizeof *gdt] = make_data_desc (0);
   gdt[SEL_UCSEG / sizeof *gdt] = make_code_desc (3);
   gdt[SEL_UDSEG / sizeof *gdt] = make_data_desc (3);
-  gdt[SEL_TSS / sizeof *gdt] = make_tss_desc (vtop (tss));
+  gdt[SEL_TSS / sizeof *gdt] = make_tss_desc (tss);
 
   /* Load GDTR, TR. */
   gdtr_operand = make_dtr_operand (sizeof gdt - 1, gdt);