Reboot the machine when you hit escape. Wait, what?

[netwatch.git] / grubload / multiboot_c.c

diff --git a/grubload/multiboot_c.c b/grubload/multiboot_c.c
index 25522e26c7cdffe8a14945a0066ad247f9454554..990ffc65aecc045c0e45bab077da799b862d5812 100644 (file)
--- a/grubload/multiboot_c.c
+++ b/grubload/multiboot_c.c
@@ -1,4 +1,5 @@
 #include "console.h"
 #include "console.h"

+#include <io.h>

 
 extern char _binary_realmode_bin_start[];
 extern int _binary_realmode_bin_size;
 
 extern char _binary_realmode_bin_start[];
 extern int _binary_realmode_bin_size;


@@ -23,31 +24,62 @@ struct mod_info
 
 void c_start(unsigned int magic, struct mb_info *wee)
 {
 
 void c_start(unsigned int magic, struct mb_info *wee)
 {

-       unsigned short *grubptr = 0x7CFE;
+       unsigned short *grubptr = (unsigned short *)0x7CFE;
+       unsigned char smramc;

        int i;
        
        int i;
        

-       void (*realmode)() = 0x4000;
+       void (*realmode)() = (void (*)()) 0x4000;

        
        

-       puts("Magic is: ");
-       puthex(magic);
-       puts("\nMultiboot header is: ");
-       puthex(wee);
-       puts("\n");

        show_cursor();
        show_cursor();

+       puts("NetWatch loader\n");

        
        

-       puts("Grubptr is: ");
-       puthex(*grubptr);
-       puts("\n");
+       if (magic != 0x2BADB002)
+       {
+               puts("Bootloader was not multiboot compliant; cannot continue.\n");
+               while(1) asm("hlt");
+       }

        
        for (i = 0; i < wee->mod_cnt; i++)
        {
        
        for (i = 0; i < wee->mod_cnt; i++)
        {

-               puts("Module:\n");
+               puts("Module found:\n");

                puts("  Start: "); puthex(wee->mods[i].mod_start); puts("\n");
                puts("  Size: "); puthex(wee->mods[i].mod_end - wee->mods[i].mod_start); puts("\n");
                puts("  Name: "); puts(wee->mods[i].mod_string); puts("\n");
        }
 
                puts("  Start: "); puthex(wee->mods[i].mod_start); puts("\n");
                puts("  Size: "); puthex(wee->mods[i].mod_end - wee->mods[i].mod_start); puts("\n");
                puts("  Name: "); puts(wee->mods[i].mod_string); puts("\n");
        }
 

+       if (wee->mod_cnt != 1)
+       {
+               puts("Expected exactly one module; cannot continue.\n");
+               while(1) asm("hlt");
+       }
+
+       puts("Current USB state is: "); puthex(pci_read16(0, 31, 2, 0xC0)); puts(" "); puthex(pci_read16(0, 31, 4, 0xC0)); puts("\n");
+       puts("Current SMI state is: "); puthex(inl(0x830)); puts("\n");
+       puts("Current SMRAMC state is: "); puthex(pci_read8(0, 0, 0, 0x70)); puts("\n");
+       
+       outl(0x830, inl(0x830) & ~0x1); /* turn off SMIs */
+       
+       /* Try really hard to shut up USB_LEGKEY. */
+       pci_write16(0, 31, 2, 0xC0, pci_read16(0, 31, 2, 0xC0));
+       pci_write16(0, 31, 2, 0xC0, 0);
+       pci_write16(0, 31, 4, 0xC0, pci_read16(0, 31, 4, 0xC0));
+       pci_write16(0, 31, 4, 0xC0, 0);
+       smramc = pci_read8(0, 0, 0, 0x70);
+       pci_write8(0, 0, 0, 0x70, (smramc & 0xF0) | 0x04);
+       load_elf(wee->mods[0].mod_start, wee->mods[0].mod_end - wee->mods[0].mod_start);
+       pci_write8(0, 0, 0, 0x70, smramc);
+       outb(0x830, inb(0x830) | 0x41); /* turn on the SMIs we want */
+       
+       puts("Waiting for a bit before returning to real mode...");
+       for (i=0; i<0x500000; i++)
+       {
+               if ((i % 0x100000) == 0)
+                       puts(".");
+               inb(0x80);
+       }
+       puts("\n");
+

        puts("Now returning to real mode.\n");  
        memcpy(0x4000, _binary_realmode_bin_start, (int)&_binary_realmode_bin_size);
        puts("Now returning to real mode.\n");  
        memcpy(0x4000, _binary_realmode_bin_start, (int)&_binary_realmode_bin_size);

-       realmode();
+       realmode();     // goodbye!

 }
 }