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Commit 8d927391 authored by Milton Miller's avatar Milton Miller Committed by Paul Mackerras
Browse files

[PATCH] ppc64: Consolidate early console and PPCDBG code 



Consolidate the early console and PPCDBG code in udbg.c

Signed-off-by: default avatarMilton Miller <miltonm@bga.com>
Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 188d2ce7

arch/ppc64/kernel/setup.c

+1 −31
Original line number Diff line number Diff line
@@ -108,7 +108,6 @@ int boot_cpuid = 0; 
int boot_cpuid_phys = 0;

dev_t boot_dev;

u64 ppc64_pft_size;

u64 ppc64_debug_switch;



struct ppc64_caches ppc64_caches;

EXPORT_SYMBOL_GPL(ppc64_caches);
@@ -154,34 +153,6 @@ struct screen_info screen_info = { 
	.orig_video_points = 16

};



/*

 * Initialize the PPCDBG state.  Called before relocation has been enabled.

 */

void __init ppcdbg_initialize(void)

{

	ppc64_debug_switch = PPC_DEBUG_DEFAULT; /* | PPCDBG_BUSWALK | */

	/* PPCDBG_PHBINIT | PPCDBG_MM | PPCDBG_MMINIT | PPCDBG_TCEINIT | PPCDBG_TCE */;

}



/*

 * Early boot console based on udbg

 */

static struct console udbg_console = {

	.name	= "udbg",

	.write	= udbg_console_write,

	.flags	= CON_PRINTBUFFER,

	.index	= -1,

};

static int early_console_initialized;



void __init disable_early_printk(void)

{

	if (!early_console_initialized)

		return;

	unregister_console(&udbg_console);

	early_console_initialized = 0;

}



#if defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP)



static int smt_enabled_cmdline;
@@ -630,8 +601,7 @@ void __init setup_system(void) 
	/*

	 * Register early console

	 */

	early_console_initialized = 1;

	register_console(&udbg_console);

	register_early_udbg_console();



	/* Save unparsed command line copy for /proc/cmdline */

	strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);

arch/ppc64/kernel/udbg.c

+46 −5
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <linux/config.h>

#include <linux/types.h>

#include <linux/sched.h>

#include <linux/console.h>

#include <asm/ppcdebug.h>

#include <asm/processor.h>
@@ -21,6 +22,7 @@ void (*udbg_putc)(unsigned char c); 
unsigned char (*udbg_getc)(void);

int (*udbg_getc_poll)(void);



/* udbg library, used by xmon et al */

void udbg_puts(const char *s)

{

	if (udbg_putc) {
@@ -75,11 +77,6 @@ int udbg_read(char *buf, int buflen) 
	return i;

}



void udbg_console_write(struct console *con, const char *s, unsigned int n)

{

	udbg_write(s, n);

}



#define UDBG_BUFSIZE 256

void udbg_printf(const char *fmt, ...)

{
@@ -92,6 +89,10 @@ void udbg_printf(const char *fmt, ...) 
	va_end(args);

}



/* PPCDBG stuff */



u64 ppc64_debug_switch;



/* Special print used by PPCDBG() macro */

void udbg_ppcdbg(unsigned long debug_flags, const char *fmt, ...)

{
@@ -131,3 +132,43 @@ unsigned long udbg_ifdebug(unsigned long flags) 
{

	return (flags & ppc64_debug_switch);

}



/*

 * Initialize the PPCDBG state.  Called before relocation has been enabled.

 */

void __init ppcdbg_initialize(void)

{

	ppc64_debug_switch = PPC_DEBUG_DEFAULT; /* | PPCDBG_BUSWALK | */

	/* PPCDBG_PHBINIT | PPCDBG_MM | PPCDBG_MMINIT | PPCDBG_TCEINIT | PPCDBG_TCE */;

}



/*

 * Early boot console based on udbg

 */

static void udbg_console_write(struct console *con, const char *s,

		unsigned int n)

{

	udbg_write(s, n);

}



static struct console udbg_console = {

	.name	= "udbg",

	.write	= udbg_console_write,

	.flags	= CON_PRINTBUFFER,

	.index	= -1,

};



void __init disable_early_printk(void)

{

	unregister_console(&udbg_console);

}



/* called by setup_system */

void register_early_udbg_console(void)

{

	register_console(&udbg_console);

}



#if 0   /* if you want to use this as a regular output console */

console_initcall(register_udbg_console);

#endif

include/asm-ppc64/udbg.h

+3 −3
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
#define __UDBG_HDR



#include <linux/compiler.h>

#include <linux/init.h>



/*

 * c 2001 PPC 64 Team, IBM Corp
@@ -20,12 +21,11 @@ extern void udbg_puts(const char *s); 
extern int udbg_write(const char *s, int n);

extern int udbg_read(char *buf, int buflen);



struct console;

extern void udbg_console_write(struct console *con, const char *s, unsigned int n);

extern void register_early_udbg_console(void);

extern void udbg_printf(const char *fmt, ...);

extern void udbg_ppcdbg(unsigned long flags, const char *fmt, ...);

extern unsigned long udbg_ifdebug(unsigned long flags);



extern void __init ppcdbg_initialize(void);



extern void udbg_init_uart(void __iomem *comport, unsigned int speed);

#endif