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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* CPU-specific functions needed by the Kernel-Debugger Interface (KDI). These
* functions are invoked directly by the kernel debugger (kmdb) while the system
* has been stopped, and as such must not use any kernel facilities that block
* or otherwise rely on forward progress by other parts of the kernel.
*
* These functions may also be called before unix`_start, and as such cannot
* use any kernel facilities that must be initialized as part of system start.
* An example of such a facility is drv_usecwait(), which relies on a parameter
* that is initialized by the unix module. As a result, drv_usecwait() may not
* be used by KDI functions.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/archsystm.h>
#include <sys/machsystm.h>
#include <sys/cpu_module.h>
#include <sys/xc_impl.h>
#include <sys/intreg.h>
#include <sys/kdi_impl.h>
/*
* We keep our own copies, used for cache flushing, because we can be called
* before cpu_fiximpl().
*/
static int kdi_dcache_size;
static int kdi_dcache_linesize;
static int kdi_icache_size;
static int kdi_icache_linesize;
/*
* Assembly support for SPARC64-VI modules in opl_olympus_asm.s
*/
extern int idsr_busy(void);
extern void init_mondo_nocheck(xcfunc_t *func, uint64_t arg1, uint64_t arg2);
extern void shipit(int, int);
extern void kdi_flush_idcache(int, int, int, int);
extern int kdi_get_stick(uint64_t *);
static void kdi_tickwait(clock_t);
static int
kdi_cpu_ready_iter(int (*cb)(int, void *), void *arg)
{
int rc, i;
for (rc = 0, i = 0; i < NCPU; i++) {
if (CPU_IN_SET(cpu_ready_set, i))
rc += cb(i, arg);
}
return (rc);
}
/*
* Sends a cross-call to a specified processor. The caller assumes
* responsibility for repetition of cross-calls, as appropriate (MARSA for
* debugging).
*/
static int
kdi_xc_one(int cpuid, void (*func)(uintptr_t, uintptr_t), uintptr_t arg1,
uintptr_t arg2)
{
uint64_t idsr;
uint64_t endtick, tick;
init_mondo_nocheck((xcfunc_t *)func, arg1, arg2);
shipit(cpuid, 0);
/* Spin for at most 1 second for checking */
endtick = gettick() + (uint64_t)sys_tick_freq;
idsr = getidsr();
if (idsr & IDSR_BUSY) {
do {
idsr = getidsr();
tick = gettick();
if (tick > endtick) {
return (KDI_XC_RES_BUSY);
}
} while (idsr & IDSR_BUSY);
}
kdi_tickwait(20000);
if (idsr & IDSR_NACK)
return (KDI_XC_RES_NACK);
else
return (KDI_XC_RES_OK);
}
static void
kdi_tickwait(clock_t nticks)
{
clock_t endtick = gettick() + nticks;
while (gettick() < endtick)
;
}
static void
kdi_cpu_init(int dcache_size, int dcache_linesize, int icache_size,
int icache_linesize)
{
kdi_dcache_size = dcache_size;
kdi_dcache_linesize = dcache_linesize;
kdi_icache_size = icache_size;
kdi_icache_linesize = icache_linesize;
}
/* used directly by kdi_read/write_phys */
void
kdi_flush_caches(void)
{
kdi_flush_idcache(kdi_dcache_size, kdi_dcache_linesize,
kdi_icache_size, kdi_icache_linesize);
}
void
cpu_kdi_init(kdi_t *kdi)
{
kdi->kdi_flush_caches = kdi_flush_caches;
kdi->mkdi_cpu_init = kdi_cpu_init;
kdi->mkdi_cpu_ready_iter = kdi_cpu_ready_iter;
kdi->mkdi_xc_one = kdi_xc_one;
kdi->mkdi_tickwait = kdi_tickwait;
kdi->mkdi_get_stick = kdi_get_stick;
}
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