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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>
This commit is contained in:
Finn Thain 2014-04-12 23:49:30 +10:00 committed by Geert Uytterhoeven
parent 7913ad1ad8
commit c46f46d02c
3 changed files with 25 additions and 33 deletions
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21
arch/m68k/kernel/early_printk.c
View File

@ -12,12 +12,21 @@
#include <linux/string.h> #include <linux/string.h>
#include <asm/setup.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); asmlinkage void __init debug_cons_nputs(const char *s, unsigned n);
static void debug_cons_write(struct console *c, static void __ref debug_cons_write(struct console *c,
const char *s, unsigned n) 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 = { static struct console early_console_instance = {
@ -29,10 +38,6 @@ static struct console early_console_instance = {
static int __init setup_early_printk(char *buf) 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) if (early_console || buf)
return 0; return 0;
@ -52,7 +57,7 @@ early_param("earlyprintk", setup_early_printk);
static int __init unregister_early_console(void) static int __init unregister_early_console(void)
{ {
if (!early_console) if (!early_console || MACH_IS_MVME16x)
return 0; return 0;
return unregister_console(early_console); return unregister_console(early_console);

11
arch/m68k/kernel/head.S
View File

@ -2936,6 +2936,15 @@ L(serial_init_not_mac):
2: 2:
#endif #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 #ifdef CONFIG_APOLLO
/* We count on the PROM initializing SIO1 */ /* We count on the PROM initializing SIO1 */
#endif #endif
@ -3768,7 +3777,9 @@ M167_CYIER = 0xfff45011
M167_CYLICR = 0xfff45026 M167_CYLICR = 0xfff45026
M167_CYTEOIR = 0xfff45085 M167_CYTEOIR = 0xfff45085
M167_CYTDR = 0xfff450f8 M167_CYTDR = 0xfff450f8
M167_PCSCCMICR = 0xfff4201d
M167_PCSCCTICR = 0xfff4201e M167_PCSCCTICR = 0xfff4201e
M167_PCSCCRICR = 0xfff4201f
M167_PCTPIACKR = 0xfff42025 M167_PCTPIACKR = 0xfff42025
#endif #endif

26
arch/m68k/mvme16x/config.c
View File

@ -213,7 +213,7 @@ static void __init mvme16x_init_IRQ (void)
#define CySCRH (0x22) #define CySCRH (0x22)
#define CyTFTC (0x80) #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 unsigned char *base_addr = (u_char *)CD2401_ADDR;
volatile u_char sink; volatile u_char sink;
@ -268,20 +268,6 @@ static void cons_write(struct console *co, const char *str, unsigned count)
base_addr[CyIER] = ier; 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 #endif
void __init config_mvme16x(void) void __init config_mvme16x(void)
@ -336,16 +322,6 @@ void __init config_mvme16x(void)
else else
{ {
mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401; 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
} }
} }