7 files changed, 105 insertions, 29 deletions

diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index fbb47daf2459..0c229551eead 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -4,7 +4,7 @@
 # create a compressed vmlinux image from the original vmlinux
 #
 
-targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma vmlinux.bin.lzo head_$(BITS).o misc.o piggy.o
+targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma vmlinux.bin.lzo head_$(BITS).o misc.o string.o cmdline.o early_serial_console.o piggy.o
 
 KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
 KBUILD_CFLAGS += -fno-strict-aliasing -fPIC
@@ -23,7 +23,7 @@ LDFLAGS_vmlinux := -T
 
 hostprogs-y     := mkpiggy
 
-$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/piggy.o FORCE
+$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/string.o $(obj)/cmdline.o $(obj)/early_serial_console.o $(obj)/piggy.o FORCE
         $(call if_changed,ld)
         @:
 
diff --git a/arch/x86/boot/compressed/cmdline.c b/arch/x86/boot/compressed/cmdline.c
new file mode 100644
index 000000000000..cb62f786990d
--- /dev/null
+++ b/arch/x86/boot/compressed/cmdline.c
@@ -0,0 +1,21 @@
+#include "misc.h"
+
+static unsigned long fs;
+static inline void set_fs(unsigned long seg)
+{
+        fs = seg << 4;  /* shift it back */
+}
+typedef unsigned long addr_t;
+static inline char rdfs8(addr_t addr)
+{
+        return *((char *)(fs + addr));
+}
+#include "../cmdline.c"
+int cmdline_find_option(const char *option, char *buffer, int bufsize)
+{
+        return __cmdline_find_option(real_mode->hdr.cmd_line_ptr, option, buffer, bufsize);
+}
+int cmdline_find_option_bool(const char *option)
+{
+        return __cmdline_find_option_bool(real_mode->hdr.cmd_line_ptr, option);
+}
diff --git a/arch/x86/boot/compressed/early_serial_console.c b/arch/x86/boot/compressed/early_serial_console.c
new file mode 100644
index 000000000000..261e81fb9582
--- /dev/null
+++ b/arch/x86/boot/compressed/early_serial_console.c
@@ -0,0 +1,5 @@
+#include "misc.h"
+
+int early_serial_base;
+
+#include "../early_serial_console.c"
diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index 51e240779a44..8f7bef8e9fff 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -9,23 +9,7 @@
  * 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
-#ifdef CONFIG_X86_32
-#define _ASM_X86_DESC_H 1
-#endif
-
-#include <linux/linkage.h>
-#include <linux/screen_info.h>
-#include <linux/elf.h>
-#include <linux/io.h>
-#include <asm/page.h>
-#include <asm/boot.h>
-#include <asm/bootparam.h>
+#include "misc.h"
 
 /* WARNING!!
  * This code is compiled with -fPIC and it is relocated dynamically
@@ -123,15 +107,13 @@ static void error(char *m);
 /*
  * This is set up by the setup-routine at boot-time
  */
-static struct boot_params *real_mode;           /* Pointer to real-mode data */
+struct boot_params *real_mode;          /* Pointer to real-mode data */
 static int quiet;
+static int debug;
 
 void *memset(void *s, int c, size_t n);
 void *memcpy(void *dest, const void *src, size_t n);
 
-static void __putstr(int, const char *);
-#define putstr(__x)  __putstr(0, __x)
-
 #ifdef CONFIG_X86_64
 #define memptr long
 #else
@@ -170,7 +152,21 @@ static void scroll(void)
                 vidmem[i] = ' ';
 }
 
-static void __putstr(int error, const char *s)
+#define XMTRDY          0x20
+
+#define TXR             0       /*  Transmit register (WRITE) */
+#define LSR             5       /*  Line Status               */
+static void serial_putchar(int ch)
+{
+        unsigned timeout = 0xffff;
+
+        while ((inb(early_serial_base + LSR) & XMTRDY) == 0 && --timeout)
+                cpu_relax();
+
+        outb(ch, early_serial_base + TXR);
+}
+
+void __putstr(int error, const char *s)
 {
         int x, y, pos;
         char c;
@@ -179,6 +175,14 @@ static void __putstr(int error, const char *s)
         if (!error)
                 return;
 #endif
+        if (early_serial_base) {
+                const char *str = s;
+                while (*str) {
+                        if (*str == '\n')
+                                serial_putchar('\r');
+                        serial_putchar(*str++);
+                }
+        }
 
         if (real_mode->screen_info.orig_video_mode == 0 &&
             lines == 0 && cols == 0)
@@ -305,8 +309,10 @@ asmlinkage void decompress_kernel(void *rmode, memptr heap,
 {
         real_mode = rmode;
 
-        if (real_mode->hdr.loadflags & QUIET_FLAG)
+        if (cmdline_find_option_bool("quiet"))
                 quiet = 1;
+        if (cmdline_find_option_bool("debug"))
+                debug = 1;
 
         if (real_mode->screen_info.orig_video_mode == 7) {
                 vidmem = (char *) 0xb0000;
@@ -319,6 +325,10 @@ asmlinkage void decompress_kernel(void *rmode, memptr heap,
         lines = real_mode->screen_info.orig_video_lines;
         cols = real_mode->screen_info.orig_video_cols;
 
+        console_init();
+        if (debug)
+                putstr("early console in decompress_kernel\n");
+
         free_mem_ptr     = heap;        /* Heap */
         free_mem_end_ptr = heap + BOOT_HEAP_SIZE;
 
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
new file mode 100644
index 000000000000..a267849ac1c9
--- /dev/null
+++ b/arch/x86/boot/compressed/misc.h
@@ -0,0 +1,38 @@
+#ifndef BOOT_COMPRESSED_MISC_H
+#define BOOT_COMPRESSED_MISC_H
+
+/*
+ * 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
+#ifdef CONFIG_X86_32
+#define _ASM_X86_DESC_H 1
+#endif
+
+#include <linux/linkage.h>
+#include <linux/screen_info.h>
+#include <linux/elf.h>
+#include <linux/io.h>
+#include <asm/page.h>
+#include <asm/boot.h>
+#include <asm/bootparam.h>
+
+#define BOOT_BOOT_H
+
+/* misc.c */
+extern struct boot_params *real_mode;           /* Pointer to real-mode data */
+void __putstr(int error, const char *s);
+#define putstr(__x)  __putstr(0, __x)
+#define puts(__x)  __putstr(0, __x)
+
+/* cmdline.c */
+int cmdline_find_option(const char *option, char *buffer, int bufsize);
+int cmdline_find_option_bool(const char *option);
+
+/* early_serial_console.c */
+extern int early_serial_base;
+void console_init(void);
+
+#endif
diff --git a/arch/x86/boot/compressed/string.c b/arch/x86/boot/compressed/string.c
new file mode 100644
index 000000000000..7995c6a49509
--- /dev/null
+++ b/arch/x86/boot/compressed/string.c
@@ -0,0 +1,4 @@
+#include "misc.h"
+
+#include "../isdigit.h"
+#include "../string.c"
diff --git a/arch/x86/boot/main.c b/arch/x86/boot/main.c
index 4ef1a33e8572..40358c8905be 100644
--- a/arch/x86/boot/main.c
+++ b/arch/x86/boot/main.c
@@ -132,6 +132,8 @@ void main(void)
 
         /* Initialize the early-boot console */
         console_init();
+        if (cmdline_find_option_bool("debug"))
+                puts("early console in setup code\n");
 
         /* End of heap check */
         init_heap();
@@ -171,10 +173,6 @@ void main(void)
         /* Set the video mode */
         set_video();
 
-        /* Parse command line for 'quiet' and pass it to decompressor. */
-        if (cmdline_find_option_bool("quiet"))
-                boot_params.hdr.loadflags |= QUIET_FLAG;
-
         /* Do the last things and invoke protected mode */
         go_to_protected_mode();
 }