m68k: early parameter support

Add early parameter support and convert current users to it.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 23 insertions, 18 deletions

diff --git a/arch/m68k/atari/config.c b/arch/m68k/atari/config.c
index b10e7addae5c..e40e5dcaa347 100644
--- a/arch/m68k/atari/config.c
+++ b/arch/m68k/atari/config.c
@@ -69,9 +69,6 @@ extern int atari_tt_hwclk (int, struct rtc_time *);
 extern int atari_mste_set_clock_mmss (unsigned long);
 extern int atari_tt_set_clock_mmss (unsigned long);
 
-/* atari specific debug functions (in debug.c) */
-extern void atari_debug_init(void);
-
 
 /* ++roman: This is a more elaborate test for an SCC chip, since the plain
  * Medusa board generates DTACK at the SCC's standard addresses, but a SCC
@@ -137,15 +134,18 @@ int __init atari_parse_bootinfo(const struct bi_record *record)
 
 
 /* Parse the Atari-specific switches= option. */
-void __init atari_switches_setup(const char *str, unsigned len)
+static int __init atari_switches_setup(char *str)
 {
-        char switches[len+1];
+        char switches[strlen(str) + 1];
         char *p;
         int ovsc_shift;
         char *args = switches;
 
+        if (!MACH_IS_ATARI)
+                return 0;
+
         /* copy string to local array, strsep works destructively... */
-        strlcpy(switches, str, sizeof(switches));
+        strcpy(switches, str);
         atari_switches = 0;
 
         /* parse the options */
@@ -170,8 +170,11 @@ void __init atari_switches_setup(const char *str, unsigned len)
                         atari_switches |= ATARI_SWITCH_SND7 << ovsc_shift;
                 }
         }
+        return 0;
 }
 
+early_param("switches", atari_switches_setup);
+
 
     /*
      *  Setup the Atari configuration info
@@ -183,8 +186,6 @@ void __init config_atari(void)
 
         memset(&atari_hw_present, 0, sizeof(atari_hw_present));
 
-        atari_debug_init();
-
         /* Change size of I/O space from 64KB to 4GB. */
         ioport_resource.end  = 0xFFFFFFFF;
 
diff --git a/arch/m68k/atari/debug.c b/arch/m68k/atari/debug.c
index 66983fe87509..fbeed8c8ecbc 100644
--- a/arch/m68k/atari/debug.c
+++ b/arch/m68k/atari/debug.c
@@ -19,8 +19,6 @@
 #include <asm/atarihw.h>
 #include <asm/atariints.h>
 
-extern char m68k_debug_device[];
-
 /* Flag that Modem1 port is already initialized and used */
 int atari_MFP_init_done;
 /* Flag that Modem1 port is already initialized and used */
@@ -305,26 +303,28 @@ void atari_init_midi_port(int cflag)
                      ACIA_RHTID : ACIA_RLTID);
 }
 
-void __init atari_debug_init(void)
+static int __init atari_debug_setup(char *arg)
 {
-        if (!strcmp(m68k_debug_device, "ser")) {
+        if (!MACH_IS_ATARI)
+                return 0;
+
+        if (!strcmp(arg, "ser"))
                 /* defaults to ser2 for a Falcon and ser1 otherwise */
-                strcpy(m68k_debug_device, MACH_IS_FALCON ? "ser2" : "ser1");
-        }
+                arg = MACH_IS_FALCON ? "ser2" : "ser1";
 
-        if (!strcmp(m68k_debug_device, "ser1")) {
+        if (!strcmp(arg, "ser1")) {
                 /* ST-MFP Modem1 serial port */
                 atari_init_mfp_port(B9600|CS8);
                 atari_console_driver.write = atari_mfp_console_write;
-        } else if (!strcmp(m68k_debug_device, "ser2")) {
+        } else if (!strcmp(arg, "ser2")) {
                 /* SCC Modem2 serial port */
                 atari_init_scc_port(B9600|CS8);
                 atari_console_driver.write = atari_scc_console_write;
-        } else if (!strcmp(m68k_debug_device, "midi")) {
+        } else if (!strcmp(arg, "midi")) {
                 /* MIDI port */
                 atari_init_midi_port(B9600|CS8);
                 atari_console_driver.write = atari_midi_console_write;
-        } else if (!strcmp(m68k_debug_device, "par")) {
+        } else if (!strcmp(arg, "par")) {
                 /* parallel printer */
                 atari_turnoff_irq(IRQ_MFP_BUSY); /* avoid ints */
                 sound_ym.rd_data_reg_sel = 7;   /* select mixer control */
@@ -337,4 +337,8 @@ void __init atari_debug_init(void)
         }
         if (atari_console_driver.write)
                 register_console(&atari_console_driver);
+
+        return 0;
 }
+
+early_param("debug", atari_debug_setup);