Hello List,
i'm writing to you concerning 2.4 kernel boot parameters which are used by an
IBM NetVista Thin Client 2200 (alias NetStation 8363-EXX, alias N2200) on
startup.
By now i boot the N2200 with a patched 2.4.27 Kernel compiled with gcc-3.3.5
(based on a Debian-System). The Patch was delivered by the IBM toolkit
package NetVistaLTC.tar.gz and is attached to this message.
N2200 passes different Parameters to the Kernel, which i had partly identified
with the 2.4 Kernel Documentation (Documentation\kernel-parameters.txt).
Below is a list of all passed Parameters:
root=/dev/hda1 - Root Filesystem
V=1024x768 - (?Resolution?)
D=16 - ????
ip=192.168.0.200:0.0.0.0:192.168.0.1:255.255.255.0:localhost:eth0
- IP-Address specified in nfsroot.txt
load_ramdisk=1 - Ramdisk Support is enabled.
n1=1.2.3.4 - DNS entry
n2=0.0.0.0 - yet another DNS entry
pf=2 - The ParIDE subsystem is enabled.
vga=4 - Boot Loader Parameter (Display-Setting)
There are some Parameters in the list which i could not identify. Among these
is the Parameter D=16.
Does anyone know what kind of parameter this is, or where i do find
documentation about it?
Another one is that V=1024x768 Parameter. As of the nature of the passed value
to V, i thought of some kind of resoultion settings. But i did not found
anything to read about it. Can anyone give me a hint on this?
Thanks in advance.
Christian Schäfer
--- linux/init/main.c.orig Wed Jul 11 09:40:41 2001
+++ linux/init/main.c Wed Jul 11 09:41:09 2001
@@ -518,6 +518,18 @@
printk(linux_banner);
setup_arch(&command_line);
printk("Kernel command line: %s\n", saved_command_line);
+
+ if (strstr(command_line, "hda1"))
+ command_line = strstr(command_line, "root");
+
+ if ( strstr(command_line, "hda1") && strstr(command_line, "tty2") ) {
+ parse_options(strcat(" console=/dev/ttyS3,9600 ", command_line))
+;
+ } else {
+ parse_options(command_line);
+ }
+
+
parse_options(command_line);
trap_init();
init_IRQ();
@@ -750,9 +762,9 @@
while (pid != wait(&i));
if (MAJOR(real_root_dev) != RAMDISK_MAJOR
|| MINOR(real_root_dev) != 0) {
- error = change_root(real_root_dev,"/initrd");
+ error = change_root(real_root_dev,"/dev");
if (error)
- printk(KERN_ERR "Change root to /initrd: "
+ printk(KERN_ERR "Change root to /dev: "
"error %d\n",error);
}
}
--- linux/drivers/char/pc_keyb.c.orig Mon Jul 16 16:09:55 2001
+++ linux/drivers/char/pc_keyb.c Thu Jul 12 14:28:32 2001
@@ -448,6 +448,11 @@
unsigned char status = kbd_read_status();
unsigned int work = 10000;
+
+ if (status == 0xff)
+ return 0;
+
+
while ((--work > 0) && (status & KBD_STAT_OBF)) {
unsigned char scancode;
--- linux/arch/i386/kernel/head.S.orig Mon Jul 16 16:13:11 2001
+++ linux/arch/i386/kernel/head.S Mon Jul 16 16:14:26 2001
@@ -158,7 +158,10 @@
movl $512,%ecx
rep
stosl
- movl SYMBOL_NAME(empty_zero_page)+NEW_CL_POINTER,%esi
+/* NetVista */
+/* movl SYMBOL_NAME(empty_zero_page)+NEW_CL_POINTER,%esi */
+ movl $0x98000, %esi
+
andl %esi,%esi
jnz 2f # New command line protocol
cmpw $(OLD_CL_MAGIC),OLD_CL_MAGIC_ADDR
--- linux/Makefile.orig Wed Aug 15 12:37:45 2001
+++ linux/Makefile Wed Aug 15 12:37:50 2001
@@ -1,7 +1,7 @@
VERSION = 2
PATCHLEVEL = 4
SUBLEVEL = 5
-EXTRAVERSION =
+EXTRAVERSION = -IBM
KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
--- linux/fs/nfs/file.c.orig Tue May 22 11:26:06 2001
+++ linux/fs/nfs/file.c Sun Sep 23 22:14:56 2001
@@ -41,6 +41,10 @@
static int nfs_fsync(struct file *, struct dentry *dentry, int datasync);
static int nfs_file_release(struct inode *, struct file *);
+/* 2200's do not have RTC's so we will set the initial xid from the inode
+ of the first file we read from the nfs server */
+u32 xid_init = 0;
+
struct file_operations nfs_file_operations = {
read: nfs_file_read,
write: nfs_file_write,
@@ -101,6 +105,10 @@
struct dentry * dentry = file->f_dentry;
struct inode * inode = dentry->d_inode;
ssize_t result;
+
+ /* since 2200 doesn't have RTC, lets pull time from inode on nfs server */
+ if (xid_init == 0)
+ xid_init = ( ( inode->i_atime << 16 ) + (inode->i_atime & 0x0000ffff) );
dfprintk(VFS, "nfs: read(%s/%s, %lu@%lu)\n",
dentry->d_parent->d_name.name, dentry->d_name.name,
--- linux/net/sunrpc/xprt.c.orig Thu Apr 12 14:11:39 2001
+++ linux/net/sunrpc/xprt.c Sun Sep 23 22:28:17 2001
@@ -71,6 +71,9 @@
extern spinlock_t rpc_queue_lock;
+extern u32 xid_init;
+u32 xid_set = 0;
+
/*
* Local variables
*/
@@ -1383,6 +1386,13 @@
if (!xid)
xid = CURRENT_TIME << 12;
+ /* we reset the xid based on the time of the first file we read from
+ the nfs server since 2200's do not have a RTC. */
+ if (!xid_set && xid_init != 0) {
+ xid = xid_init;
+ xid_set = 1;
+ }
+
dprintk("RPC: %4d reserved req %p xid %08x\n", task->tk_pid, req, xid);
task->tk_status = 0;
req->rq_timeout = xprt->timeout;
@@ -1391,6 +1401,7 @@
req->rq_xid = xid++;
if (!xid)
xid++;
+
}
/*
--- linux/drivers/block/loop.c.orig Sat Oct 27 12:34:26 2001
+++ linux/drivers/block/loop.c Sat Oct 27 12:34:48 2001
@@ -74,7 +74,7 @@
#define MAJOR_NR LOOP_MAJOR
-static int max_loop = 8;
+static int max_loop = 32;
static struct loop_device *loop_dev;
static int *loop_sizes;
static int *loop_blksizes;
--- linux/arch/i386/kernel/setup.c.orig Sat Oct 27 12:37:28 2001
+++ linux/arch/i386/kernel/setup.c Sat Oct 27 12:37:36 2001
@@ -173,7 +173,7 @@
#define INITRD_START (*(unsigned long *) (PARAM+0x218))
#define INITRD_SIZE (*(unsigned long *) (PARAM+0x21c))
#define COMMAND_LINE ((char *) (PARAM+2048))
-#define COMMAND_LINE_SIZE 256
+#define COMMAND_LINE_SIZE 512
#define RAMDISK_IMAGE_START_MASK 0x07FF
#define RAMDISK_PROMPT_FLAG 0x8000
--- linux/drivers/block/ll_rw_blk.c.orig Fri Nov 30 11:25:41 2001
+++ linux/drivers/block/ll_rw_blk.c Fri Nov 30 11:24:00 2001
@@ -876,9 +876,9 @@
/* This may well happen - the kernel calls bread()
without checking the size of the device, e.g.,
when mounting a device. */
- printk(KERN_INFO
+ printk(KERN_DEBUG
"attempt to access beyond end of device\n");
- printk(KERN_INFO "%s: rw=%d, want=%ld, limit=%d\n",
+ printk(KERN_DEBUG "%s: rw=%d, want=%ld, limit=%d\n",
kdevname(bh->b_rdev), rw,
(sector + count)>>1,
blk_size[major][MINOR(bh->b_rdev)]);
