d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

MFi386: Restore cpu_reset proxy code to enable reset from ddb on an AP.

Browse Source
This commit is contained in:
Nate Lawson 2004-12-27 06:42:25 +00:00
parent 593fbddfba
commit 36bd442095
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=139345
1 changed files with 39 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
sys/amd64/amd64/vm_machdep.c
View File

@ -79,6 +79,11 @@ __FBSDID("$FreeBSD$");
#include <amd64/isa/isa.h>
static void cpu_reset_real(void);
#ifdef SMP
static void cpu_reset_proxy(void);
static u_int cpu_reset_proxyid;
static volatile u_int cpu_reset_proxy_active;
#endif
/*
* Finish a fork operation, with process p2 nearly set up.
@ -322,15 +327,26 @@ cpu_set_upcall_kse(struct thread *td, struct kse_upcall *ku)
td->td_frame->tf_rdi = (register_t)ku->ku_mailbox;
}
#ifdef SMP
static void
cpu_reset_proxy()
{
cpu_reset_proxy_active = 1;
while (cpu_reset_proxy_active == 1)
; /* Wait for other cpu to see that we've started */
stop_cpus((1<<cpu_reset_proxyid));
printf("cpu_reset_proxy: Stopped CPU %d\n", cpu_reset_proxyid);
DELAY(1000000);
cpu_reset_real();
}
#endif
/*
* Force reset the processor by invalidating the entire address space!
*/
void
cpu_reset()
{
#ifdef SMP
u_int map;
u_int cnt, map;
if (smp_active) {
map = PCPU_GET(other_cpus) & ~stopped_cpus;
@ -339,6 +355,25 @@ cpu_reset()
stop_cpus(map);
}
if (PCPU_GET(cpuid) != 0) {
cpu_reset_proxyid = PCPU_GET(cpuid);
cpustop_restartfunc = cpu_reset_proxy;
cpu_reset_proxy_active = 0;
printf("cpu_reset: Restarting BSP\n");
started_cpus = (1<<0); /* Restart CPU #0 */
cnt = 0;
while (cpu_reset_proxy_active == 0 && cnt < 10000000)
cnt++; /* Wait for BSP to announce restart */
if (cpu_reset_proxy_active == 0)
printf("cpu_reset: Failed to restart BSP\n");
enable_intr();
cpu_reset_proxy_active = 2;
while (1);
/* NOTREACHED */
}
DELAY(1000000);
}
#endif