+/******************************************************************************
+ * kernel.c
+ *
+ * This file should contain architecture-independent bootstrap and low-level
+ * help routines. It's a bit x86/PC specific right now!
+ *
+ * Copyright (c) 2002-2003 K A Fraser
+ */
+
#include <stdarg.h>
#include <xeno/lib.h>
#include <xeno/errno.h>
#include <xeno/interrupt.h>
#include <xeno/compile.h>
#include <xeno/version.h>
+#include <xeno/netdevice.h>
#include <asm/io.h>
#include <asm/msr.h>
#include <asm/uaccess.h>
void init_serial(void);
void start_of_day(void);
-/* Command line options and variables. */
-unsigned int opt_console = 1;
-unsigned int opt_ser_baud = 9600; /* default baud for COM1 */
-unsigned int opt_dom0_mem = 16000; /* default kbytes for DOM0 */
-unsigned int opt_ne_base = 0; /* NE2k NICs cannot be probed */
+/* opt_console: If true, Xen sends logging to the VGA console. */
+int opt_console = 1;
+/* opt_ser_baud: Baud rate at which logging is sent to COM1. */
+unsigned int opt_ser_baud = 9600;
+/* opt_dom0_mem: Kilobytes of memory allocated to domain 0. */
+unsigned int opt_dom0_mem = 16000;
+/* opt_ifname: Name of physical network interface to use. */
unsigned char opt_ifname[10] = "eth0";
-int opt_noht=0, opt_noacpi=0, opt_nosmp=0, opt_watchdog=0;
-enum { OPT_IP, OPT_STR, OPT_UINT, OPT_BOOL };
+/* opt_noht: If true, Hyperthreading is ignored. */
+int opt_noht=0;
+/* opt_noacpi: If true, ACPI tables are not parsed. */
+int opt_noacpi=0;
+/* opt_nosmp: If true, secondary processors are ignored. */
+int opt_nosmp=0;
+/* opt_watchdog: If true, run a watchdog NMI on each processor. */
+int opt_watchdog=0;
+
static struct {
unsigned char *name;
- int type;
+ enum { OPT_IP, OPT_STR, OPT_UINT, OPT_BOOL } type;
void *var;
} opts[] = {
{ "console", OPT_UINT, &opt_console },
{ "ser_baud", OPT_UINT, &opt_ser_baud },
{ "dom0_mem", OPT_UINT, &opt_dom0_mem },
- { "ne_base", OPT_UINT, &opt_ne_base },
{ "ifname", OPT_STR, &opt_ifname },
{ "noht", OPT_BOOL, &opt_noht },
{ "noacpi", OPT_BOOL, &opt_noacpi },
{ "nosmp", OPT_BOOL, &opt_nosmp },
{ "watchdog", OPT_BOOL, &opt_watchdog },
- { NULL, 0, NULL }
+ { NULL, 0, NULL }
};
int i;
/*
- * Note that serial output cannot be done properly until
- * after command-line arguments have been parsed, and the required baud
- * rate is known. Any messages before that will be output using the
- * settings of the bootloader, for example. Maybe okay for error msgs...
+ * Note that serial output cannot be done properly until after
+ * command-line arguments have been parsed, and the required baud rate is
+ * known. Any messages before that will be output using the settings of
+ * the bootloader, for example.
*/
-#define early_error(args...) opt_console=1; init_vga(); cls(); printk(args)
if ( magic != MULTIBOOT_BOOTLOADER_MAGIC )
{
- early_error("Invalid magic number: 0x%x\n", (unsigned)magic);
- return;
- }
-
- /*
- * We require some kind of memory and module information.
- * The rest we can fake!
- */
- if ( (mbi->flags & 9) != 9 )
- {
- early_error("Bad flags passed by bootloader: 0x%x\n", (unsigned)mbi->flags);
- return;
+ init_vga();
+ cls();
+ printk("Invalid magic number: 0x%x\n", (unsigned)magic);
+ for ( ; ; ) ;
}
- if ( mbi->mods_count == 0 )
- {
- early_error("Require at least one module!\n");
- return;
- }
-
- /* Are mmap_* valid? */
-#if 0
- if ( (mbi->flags & (1<<6)) )
- {
- memory_map_t *mmap = (memory_map_t *)mbi->mmap_addr;
- struct e820entry *e820 = E820_MAP;
-
- while ( (unsigned long)mmap < (mbi->mmap_addr + mbi->mmap_length) )
- {
- e820->addr_lo = mmap->base_addr_low;
- e820->addr_hi = mmap->base_addr_high;
- e820->size_lo = mmap->length_low;
- e820->size_hi = mmap->length_high;
- e820->type = mmap->type;
- e820++;
- mmap = (memory_map_t *)
- ((unsigned long)mmap + mmap->size + sizeof (mmap->size));
- }
- }
-#endif
-
- mod = (module_t *)__va(mbi->mods_addr);
-
/* Parse the command line. */
cmdline = (unsigned char *)(mbi->cmdline ? __va(mbi->cmdline) : NULL);
if ( cmdline != NULL )
}
}
-#undef early_error
-
+ init_serial();
init_vga();
cls();
- /* INITIALISE SERIAL LINE (printk will work okay from here on). */
- init_serial();
-
printk(XEN_BANNER);
printk(" http://www.cl.cam.ac.uk/netos/xen\n");
printk(" University of Cambridge Computer Laboratory\n\n");
XEN_COMPILE_BY, XEN_COMPILE_DOMAIN,
XEN_COMPILER, XEN_COMPILE_DATE);
+ /* We require memory and module information. */
+ if ( (mbi->flags & 9) != 9 )
+ {
+ printk("FATAL ERROR: Bad flags passed by bootloader: 0x%x\n",
+ (unsigned)mbi->flags);
+ for ( ; ; ) ;
+ }
+
+ if ( mbi->mods_count == 0 )
+ {
+ printk("Require at least one Multiboot module!\n");
+ for ( ; ; ) ;
+ }
+
memcpy(&idle0_task_union, &first_task_struct, sizeof(first_task_struct));
max_page = (mbi->mem_upper+1024) >> (PAGE_SHIFT - 10);
if ( new_dom == NULL ) panic("Error creating domain 0\n");
/*
- * We're going to setup domain0 using the module(s) that we stashed safely
- * above our MAX_DIRECTMAP_ADDRESS in boot/Boot.S The second module, if
+ * We're going to setup domain0 using the module(s) that we stashed safely
+ * above our MAX_DIRECTMAP_ADDRESS in boot/Boot.S The second module, if
* present, is an initrd ramdisk
*/
+ mod = (module_t *)__va(mbi->mods_addr);
if ( setup_guestos(new_dom,
&dom0_params, 1,
(char *)MAX_DIRECTMAP_ADDRESS,
wake_up(new_dom);
cpu_idle();
-}
+}
+#ifdef CONFIG_OUTPUT_SERIAL
+
#define SERIAL_BASE 0x3f8
#define RX_BUF 0
#define TX_HOLD 0
void init_serial(void)
{
-#ifdef CONFIG_OUTPUT_SERIAL
/* 'opt_ser_baud' baud, no parity, 1 stop bit, 8 data bits. */
outb(0x83, SERIAL_BASE+DATA_FORMAT);
outb(115200/opt_ser_baud, SERIAL_BASE+DIVISOR_LO);
/* No interrupts. */
outb(0x00, SERIAL_BASE+INT_ENABLE);
-#endif
}
void putchar_serial(unsigned char c)
{
-#ifdef CONFIG_OUTPUT_SERIAL
if ( c == '\n' ) putchar_serial('\r');
while ( !(inb(SERIAL_BASE+LINE_STATUS)&(1<<5)) ) barrier();
outb(c, SERIAL_BASE+TX_HOLD);
-#endif
}
+#else
+
+void init_serial(void) {}
+void putchar_serial(unsigned char c) {}
+
+#endif
+
+
+#ifdef CONFIG_OUTPUT_CONSOLE
/* VGA text (mode 3) definitions. */
#define COLUMNS 80
/* This is actually code from vgaHWRestore in an old version of XFree86 :-) */
void init_vga(void)
{
-#ifdef CONFIG_OUTPUT_CONSOLE
/* The following VGA state was saved from a chip in text mode 3. */
static unsigned char regs[] = {
/* Sequencer registers */
int i, j = 0;
volatile unsigned char tmp;
- if(opt_console) {
- tmp = inb(0x3da);
- outb(0x00, 0x3c0);
-
- for ( i = 0; i < 5; i++ )
+ if ( !opt_console )
+ return;
+
+ tmp = inb(0x3da);
+ outb(0x00, 0x3c0);
+
+ for ( i = 0; i < 5; i++ )
outw((regs[j++] << 8) | i, 0x3c4);
-
- /* Ensure CRTC registers 0-7 are unlocked by clearing bit 7 of CRTC[17]. */
- outw(((regs[5+17] & 0x7F) << 8) | 17, 0x3d4);
-
- for ( i = 0; i < 25; i++ )
+
+ /* Ensure CRTC registers 0-7 are unlocked by clearing bit 7 of CRTC[17]. */
+ outw(((regs[5+17] & 0x7F) << 8) | 17, 0x3d4);
+
+ for ( i = 0; i < 25; i++ )
outw((regs[j++] << 8) | i, 0x3d4);
-
- for ( i = 0; i < 9; i++ )
+
+ for ( i = 0; i < 9; i++ )
outw((regs[j++] << 8) | i, 0x3ce);
-
- for ( i = 0; i < 21; i++ )
- {
- tmp = inb(0x3da);
- outb(i, 0x3c0);
- outb(regs[j++], 0x3c0);
- }
-
- tmp = inb(0x3da);
- outb(0x20, 0x3c0);
+
+ for ( i = 0; i < 21; i++ )
+ {
+ tmp = inb(0x3da);
+ outb(i, 0x3c0);
+ outb(regs[j++], 0x3c0);
}
-#endif
+
+ tmp = inb(0x3da);
+ outb(0x20, 0x3c0);
}
/* Clear the screen and initialize VIDEO, XPOS and YPOS. */
void cls(void)
{
-#ifdef CONFIG_OUTPUT_CONSOLE
int i;
- if(opt_console) {
- video = (unsigned char *) VIDEO;
-
- for (i = 0; i < COLUMNS * LINES * 2; i++)
+ if ( !opt_console )
+ return;
+
+ video = (unsigned char *) VIDEO;
+
+ for (i = 0; i < COLUMNS * LINES * 2; i++)
*(video + i) = 0;
-
- xpos = 0;
- ypos = 0;
-
- outw(10+(1<<(5+8)), 0x3d4); /* cursor off */
+
+ xpos = 0;
+ ypos = 0;
+
+ outw(10+(1<<(5+8)), 0x3d4); /* cursor off */
+}
+
+
+static void put_newline(void)
+{
+ xpos = 0;
+ ypos++;
+
+ if (ypos >= LINES)
+ {
+ static char zeroarr[2*COLUMNS] = { 0 };
+ ypos = LINES-1;
+ memcpy((char*)video,
+ (char*)video + 2*COLUMNS, (LINES-1)*2*COLUMNS);
+ memcpy((char*)video + (LINES-1)*2*COLUMNS,
+ zeroarr, 2*COLUMNS);
}
-#endif
}
-/* Put the character C on the screen. */
-static void putchar (int c)
+void putchar_console(int c)
{
- if ( (c != '\n') && ((c < 32) || (c > 126)) ) return;
- putchar_serial(c);
-
-#ifdef CONFIG_OUTPUT_CONSOLE
- if(opt_console) {
- if (c == '\n')
- {
- newline:
- xpos = 0;
- ypos++;
- if (ypos >= LINES)
- {
- static char zeroarr[2*COLUMNS] = { 0 };
- ypos = LINES-1;
- memcpy((char*)video,
- (char*)video + 2*COLUMNS, (LINES-1)*2*COLUMNS);
- memcpy((char*)video + (LINES-1)*2*COLUMNS,
- zeroarr, 2*COLUMNS);
- }
- return;
- }
-
- *(video + (xpos + ypos * COLUMNS) * 2) = c & 0xFF;
- *(video + (xpos + ypos * COLUMNS) * 2 + 1) = ATTRIBUTE;
-
- xpos++;
- if (xpos >= COLUMNS)
- goto newline;
+ if ( !opt_console )
+ return;
+
+ if ( c == '\n' )
+ {
+ put_newline();
}
+ else
+ {
+ *(video + (xpos + ypos * COLUMNS) * 2) = c & 0xFF;
+ *(video + (xpos + ypos * COLUMNS) * 2 + 1) = ATTRIBUTE;
+
+ xpos++;
+ if (xpos >= COLUMNS)
+ put_newline();
+ }
+}
+
+#else
+
+void init_vga(void) {}
+void cls(void) {}
+void putchar_console(int c) {}
+
#endif
+
+
+static void putchar(int c)
+{
+ if ( (c != '\n') && ((c < 32) || (c > 126)) ) return;
+ putchar_serial(c);
+ putchar_console(c);
}
+
static inline void __putstr(const char *str)
{
while ( *str ) putchar(*str++);
}
+
void printf (const char *fmt, ...)
{
va_list args;
spin_unlock_irqrestore(&console_lock, flags);
}
+
void panic(const char *fmt, ...)
{
va_list args;
machine_restart(0);
}
+
/* No-op syscall. */
asmlinkage long sys_ni_syscall(void)
{
}
-
-/* XXX SMH: below is rather vile; pulled in to allow network console */
-
-extern int netif_rx(struct sk_buff *);
-
/*
* Function written by ek247. Exports console output from all domains upwards
* to domain0, by stuffing it into a fake network packet.
return(0);
}
+
void __out_of_line_bug(int line)
{
printk("kernel BUG in header file at line %d\n", line);
BUG();
for ( ; ; ) continue;
}
+
+
+/*
+ * GRAVEYARD
+ */
+#if 0
+ if ( (mbi->flags & (1<<6)) )
+ {
+ memory_map_t *mmap = (memory_map_t *)mbi->mmap_addr;
+ struct e820entry *e820 = E820_MAP;
+
+ while ( (unsigned long)mmap < (mbi->mmap_addr + mbi->mmap_length) )
+ {
+ e820->addr_lo = mmap->base_addr_low;
+ e820->addr_hi = mmap->base_addr_high;
+ e820->size_lo = mmap->length_low;
+ e820->size_hi = mmap->length_high;
+ e820->type = mmap->type;
+ e820++;
+ mmap = (memory_map_t *)
+ ((unsigned long)mmap + mmap->size + sizeof (mmap->size));
+ }
+ }
+#endif
+
-// <xeno/console.h> - Xen header file concerning console access
-// Copyright (c) 2003 James Scott, Intel Research Cambridge
+/******************************************************************************
+ * xeno/console.h
+ *
+ * Xen header file concerning console access.
+ *
+ * Copyright (c) 2003 James Scott, Intel Research Cambridge
+ */
+
+/*
+ * Ownership of console --- currently hardwired to dom0. This is used to see
+ * who gets the PS/2 keyboard/mouse events
+ */
-// ownership of console - current defaulting to dom0
-// this is currently used to see who gets the PS/2 keyboard/mouse events
#define CONSOLE_ISOWNER(p) (p->domain == 0)
-#define CONSOLE_OWNER find_domain_by_id(0)
+#define CONSOLE_OWNER (find_domain_by_id(0))
-// Xen output redirection (in common/kernel.c!)
-//
-// This is coarsely done right now -
-// a boot-time option for console output
-// a compile-time option for serial output
-//
-// Really, when starting up a guest os with console privilege, we should:
-// - reset the video to a known state
-// - stop sending characters (use global var opt_console)
-// - allow the guest os access to the video RAM area (instead of the coarse IOPL hack nowadays) and keyboard (see above)
-// Similarly, when stopping that guest os, we should:
-// - stop allowing the guest os access to video RAM
-// - reset the video to a known state
-// - start sending it console output again (if we so desire)
-//
-// resetting the video to a known state has not been explored yet
-// the notion of privileges for guest os's (e.g. console privilege) has not been explored yet
-// so this will do for now
+/*
+ * Xen output redirection (in common/kernel.c)
+ *
+ * This is coarsely done right now -
+ * - a boot-time option for console output
+ * - a compile-time option for serial output and console output
+ *
+ * Really, when starting up a guest os with console privilege, we should:
+ * - reset the video to a known state
+ * - stop sending characters (clear 'opt_console')
+ * - allow the guest os access to the video RAM area and keyboard
+ * Similarly, when stopping that guest os, we should:
+ * - stop allowing the guest os access to video RAM
+ * - reset the video to a known state
+ * - start sending it console output again (if we so desire)
+ *
+ * Resetting the video to a known state has not been explored yet, although
+ * Xen resets to a VGA text mode at start of day. Also, the notion of
+ * privileges for guest os's (e.g. console privilege) has not been explored
+ * yet, so this will do for now.
+ */
-#define CONFIG_OUTPUT_CONSOLE 1 // XXX You need to undef this
- // but see also opt_console
+#define CONFIG_OUTPUT_CONSOLE 1
#define CONFIG_OUTPUT_SERIAL 1
-extern unsigned int opt_console;
+extern int opt_console;
projects / xen.git / commitdiff