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authorFinn Thain <fthain@telegraphics.com.au>2014-04-12 23:49:30 +1000
committerGeert Uytterhoeven <geert@linux-m68k.org>2014-05-28 10:11:53 +0200
commitc46f46d02c90959b82b99badfadc575081666aae (patch)
treeeef1f9bde612c02693fbd8042e4a57b89783ade8 /arch/m68k
parent7913ad1ad83409e7f9ed5758bb4324bf64c95a73 (diff)
downloadlinux-c46f46d02c90959b82b99badfadc575081666aae.tar.gz
m68k/mvme16x: Adopt common boot console
In a multi-platform kernel binary we only need one early console instance. The difficulty here is that the common early console is started by early_param(), whereas the MVME16x instance is started later by config_mvme16x(). That means some interrupt setup must be done earlier. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Tested-by: Stephen N Chivers <schivers@csc.com.au> [Geert] Tag debug_cons_write() with __ref to kill section mismatch warning Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/kernel/early_printk.c21
-rw-r--r--arch/m68k/kernel/head.S11
-rw-r--r--arch/m68k/mvme16x/config.c26
3 files changed, 25 insertions, 33 deletions
diff --git a/arch/m68k/kernel/early_printk.c b/arch/m68k/kernel/early_printk.c
index 919b8379454..ff9708d7192 100644
--- a/arch/m68k/kernel/early_printk.c
+++ b/arch/m68k/kernel/early_printk.c
@@ -12,12 +12,21 @@
#include <linux/string.h>
#include <asm/setup.h>
+extern void mvme16x_cons_write(struct console *co,
+ const char *str, unsigned count);
+
asmlinkage void __init debug_cons_nputs(const char *s, unsigned n);
-static void debug_cons_write(struct console *c,
- const char *s, unsigned n)
+static void __ref debug_cons_write(struct console *c,
+ const char *s, unsigned n)
{
- debug_cons_nputs(s, n);
+#if !(defined(CONFIG_SUN3) || defined(CONFIG_M68360) || \
+ defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE))
+ if (MACH_IS_MVME16x)
+ mvme16x_cons_write(c, s, n);
+ else
+ debug_cons_nputs(s, n);
+#endif
}
static struct console early_console_instance = {
@@ -29,10 +38,6 @@ static struct console early_console_instance = {
static int __init setup_early_printk(char *buf)
{
- /* MVME16x registers an early console after interrupt setup. */
- if (MACH_IS_MVME16x)
- return 0;
-
if (early_console || buf)
return 0;
@@ -52,7 +57,7 @@ early_param("earlyprintk", setup_early_printk);
static int __init unregister_early_console(void)
{
- if (!early_console)
+ if (!early_console || MACH_IS_MVME16x)
return 0;
return unregister_console(early_console);
diff --git a/arch/m68k/kernel/head.S b/arch/m68k/kernel/head.S
index a3cfada8836..b671f07aeb8 100644
--- a/arch/m68k/kernel/head.S
+++ b/arch/m68k/kernel/head.S
@@ -2936,6 +2936,15 @@ L(serial_init_not_mac):
2:
#endif
+#ifdef CONFIG_MVME16x
+ is_not_mvme16x(L(serial_init_not_mvme16x))
+ moveb #0x10,M167_PCSCCMICR
+ moveb #0x10,M167_PCSCCTICR
+ moveb #0x10,M167_PCSCCRICR
+ jra L(serial_init_done)
+L(serial_init_not_mvme16x):
+#endif
+
#ifdef CONFIG_APOLLO
/* We count on the PROM initializing SIO1 */
#endif
@@ -3768,7 +3777,9 @@ M167_CYIER = 0xfff45011
M167_CYLICR = 0xfff45026
M167_CYTEOIR = 0xfff45085
M167_CYTDR = 0xfff450f8
+M167_PCSCCMICR = 0xfff4201d
M167_PCSCCTICR = 0xfff4201e
+M167_PCSCCRICR = 0xfff4201f
M167_PCTPIACKR = 0xfff42025
#endif
diff --git a/arch/m68k/mvme16x/config.c b/arch/m68k/mvme16x/config.c
index eab7d342757..a53803cc66c 100644
--- a/arch/m68k/mvme16x/config.c
+++ b/arch/m68k/mvme16x/config.c
@@ -213,7 +213,7 @@ static void __init mvme16x_init_IRQ (void)
#define CySCRH (0x22)
#define CyTFTC (0x80)
-static void cons_write(struct console *co, const char *str, unsigned count)
+void mvme16x_cons_write(struct console *co, const char *str, unsigned count)
{
volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
volatile u_char sink;
@@ -268,20 +268,6 @@ static void cons_write(struct console *co, const char *str, unsigned count)
base_addr[CyIER] = ier;
}
-static struct console cons_info =
-{
- .name = "sercon",
- .write = cons_write,
- .flags = CON_PRINTBUFFER | CON_BOOT,
- .index = -1,
-};
-
-static void __init mvme16x_early_console(void)
-{
- register_console(&cons_info);
-
- printk(KERN_INFO "MVME16x: early console registered\n");
-}
#endif
void __init config_mvme16x(void)
@@ -336,16 +322,6 @@ void __init config_mvme16x(void)
else
{
mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
-
- /* Dont allow any interrupts from the CD2401 until the interrupt */
- /* handlers are installed */
-
- pcc2chip[PccSCCMICR] = 0x10;
- pcc2chip[PccSCCTICR] = 0x10;
- pcc2chip[PccSCCRICR] = 0x10;
-#ifdef CONFIG_EARLY_PRINTK
- mvme16x_early_console();
-#endif
}
}