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[PATCH] powerpc: Early debugging support for iSeries
Connect iSeries up to the standard early debugging infrastructure. To actually use this you need to enable the iSeries early debugging in setup_64.c. Then after the messages are logged hit Ctrl-x Ctrl-x on your console to dump the Hypervisor console buffer. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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3 changed files with 26 additions and 10 deletions
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@ -75,22 +75,26 @@
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* but your kernel will not boot on anything else if you do so
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*/
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/* This one is for use on LPAR machines that support an HVC console
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* on vterm 0
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*/
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/* For use on LPAR machines that support an HVC console on vterm 0 */
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extern void udbg_init_debug_lpar(void);
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/* This one is for use on Apple G5 machines
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*/
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/* This one is for use on Apple G5 machines */
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extern void udbg_init_pmac_realmode(void);
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/* That's RTAS panel debug */
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extern void call_rtas_display_status_delay(unsigned char c);
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/* Here's maple real mode debug */
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extern void udbg_init_maple_realmode(void);
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/* For iSeries - hit Ctrl-x Ctrl-x to see the output */
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extern void udbg_init_iseries(void);
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#define EARLY_DEBUG_INIT() do {} while(0)
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#if 0
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#define EARLY_DEBUG_INIT() udbg_init_debug_lpar()
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#define EARLY_DEBUG_INIT() udbg_init_iseries()
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#define EARLY_DEBUG_INIT() udbg_init_maple_realmode()
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#define EARLY_DEBUG_INIT() udbg_init_pmac_realmode()
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#define EARLY_DEBUG_INIT() \
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@ -52,6 +52,7 @@
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#include <asm/iseries/mf.h>
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#include <asm/iseries/hv_lp_event.h>
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#include <asm/iseries/lpar_map.h>
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#include <asm/udbg.h>
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#include "naca.h"
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#include "setup.h"
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@ -62,10 +63,8 @@
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#include "call_sm.h"
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#include "call_hpt.h"
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extern void hvlog(char *fmt, ...);
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#ifdef DEBUG
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#define DBG(fmt...) hvlog(fmt)
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#define DBG(fmt...) udbg_printf(fmt)
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#else
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#define DBG(fmt...)
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#endif
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@ -984,3 +983,16 @@ static int __init early_parsemem(char *p)
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return 0;
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}
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early_param("mem", early_parsemem);
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static void hvputc(char c)
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{
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if (c == '\n')
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hvputc('\r');
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HvCall_writeLogBuffer(&c, 1);
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}
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void __init udbg_init_iseries(void)
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{
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udbg_putc = hvputc;
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}
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@ -131,7 +131,7 @@ static void initDataEvent(struct viocharlpevent *viochar, HvLpIndex lp);
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static struct tty_driver *viotty_driver;
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void hvlog(char *fmt, ...)
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static void hvlog(char *fmt, ...)
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{
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int i;
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unsigned long flags;
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@ -147,7 +147,7 @@ void hvlog(char *fmt, ...)
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spin_unlock_irqrestore(&consoleloglock, flags);
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}
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void hvlogOutput(const char *buf, int count)
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static void hvlogOutput(const char *buf, int count)
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{
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unsigned long flags;
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int begin;
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