X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fx86%2Fboot%2Fcompressed%2Fmisc_32.c;h=52fc214546e9e0f3110778376dc03f5399187e8f;hb=818a08f8a5681d54532af8263099bb5561afa0c1;hp=b28505c544c9ca60306c5029326fb82b16ef4b95;hpb=541010e4b8921cd781ff02ae68028501457045b6;p=linux-2.6

diff --git a/arch/x86/boot/compressed/misc_32.c b/arch/x86/boot/compressed/misc_32.c
index b28505c544..52fc214546 100644
--- a/arch/x86/boot/compressed/misc_32.c
+++ b/arch/x86/boot/compressed/misc_32.c
@@ -1,7 +1,7 @@
 /*
  * misc.c
- * 
- * This is a collection of several routines from gzip-1.0.3 
+ *
+ * This is a collection of several routines from gzip-1.0.3
  * adapted for Linux.
  *
  * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
@@ -9,6 +9,11 @@
  * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
  */
 
+/*
+ * we have to be careful, because no indirections are allowed here, and
+ * paravirt_ops is a kind of one. As it will only run in baremetal anyway,
+ * we just keep it from happening
+ */
 #undef CONFIG_PARAVIRT
 #include <linux/linkage.h>
 #include <linux/vmalloc.h>
@@ -25,7 +30,7 @@
 
 /*
  * Getting to provable safe in place decompression is hard.
- * Worst case behaviours need to be analized.
+ * Worst case behaviours need to be analyzed.
  * Background information:
  *
  * The file layout is:
@@ -94,7 +99,7 @@
  * Adding 32768 instead of 32767 just makes for round numbers.
  * Adding the decompressor_size is necessary as it musht live after all
  * of the data as well.  Last I measured the decompressor is about 14K.
- * 10K of actuall data and 4K of bss.
+ * 10K of actual data and 4K of bss.
  *
  */
 
@@ -247,6 +252,9 @@ static void putstr(const char *s)
 	int x,y,pos;
 	char c;
 
+	if (RM_SCREEN_INFO.orig_video_mode == 0 && lines == 0 && cols == 0)
+		return;
+
 	x = RM_SCREEN_INFO.orig_x;
 	y = RM_SCREEN_INFO.orig_y;
 
@@ -258,7 +266,7 @@ static void putstr(const char *s)
 				y--;
 			}
 		} else {
-			vidmem [ ( x + cols * y ) * 2 ] = c;
+			vidmem [(x + cols * y) * 2] = c;
 			if ( ++x >= cols ) {
 				x = 0;
 				if ( ++y >= lines ) {
@@ -273,16 +281,16 @@ static void putstr(const char *s)
 	RM_SCREEN_INFO.orig_y = y;
 
 	pos = (x + cols * y) * 2;	/* Update cursor position */
-	outb_p(14, vidport);
-	outb_p(0xff & (pos >> 9), vidport+1);
-	outb_p(15, vidport);
-	outb_p(0xff & (pos >> 1), vidport+1);
+	outb(14, vidport);
+	outb(0xff & (pos >> 9), vidport+1);
+	outb(15, vidport);
+	outb(0xff & (pos >> 1), vidport+1);
 }
 
 static void* memset(void* s, int c, unsigned n)
 {
 	int i;
-	char *ss = (char*)s;
+	char *ss = s;
 
 	for (i=0;i<n;i++) ss[i] = c;
 	return s;
@@ -291,7 +299,8 @@ static void* memset(void* s, int c, unsigned n)
 static void* memcpy(void* dest, const void* src, unsigned n)
 {
 	int i;
-	char *d = (char *)dest, *s = (char *)src;
+	const char *s = src;
+	char *d = dest;
 
 	for (i=0;i<n;i++) d[i] = s[i];
 	return dest;
@@ -336,11 +345,13 @@ static void error(char *x)
 	putstr(x);
 	putstr("\n\n -- System halted");
 
-	while(1);	/* Halt */
+	while (1)
+		asm("hlt");
 }
 
 asmlinkage void decompress_kernel(void *rmode, unsigned long end,
-			uch *input_data, unsigned long input_len, uch *output)
+				  uch *input_data, unsigned long input_len,
+				  uch *output)
 {
 	real_mode = rmode;
 
@@ -355,10 +366,10 @@ asmlinkage void decompress_kernel(void *rmode, unsigned long end,
 	lines = RM_SCREEN_INFO.orig_video_lines;
 	cols = RM_SCREEN_INFO.orig_video_cols;
 
-	window = output;  	/* Output buffer (Normally at 1M) */
-	free_mem_ptr     = end;	/* Heap  */
+	window = output;		/* Output buffer (Normally at 1M) */
+	free_mem_ptr     = end;		/* Heap */
 	free_mem_end_ptr = end + HEAP_SIZE;
-	inbuf  = input_data;	/* Input buffer */
+	inbuf  = input_data;		/* Input buffer */
 	insize = input_len;
 	inptr  = 0;
 
@@ -372,8 +383,8 @@ asmlinkage void decompress_kernel(void *rmode, unsigned long end,
 #endif
 
 	makecrc();
-	putstr("Uncompressing Linux... ");
+	putstr("\nDecompressing Linux... ");
 	gunzip();
-	putstr("Ok, booting the kernel.\n");
+	putstr("done.\nBooting the kernel.\n");
 	return;
 }