diff options
Diffstat (limited to 'sys/amd64/amd64/vm_machdep.c')
| -rw-r--r-- | sys/amd64/amd64/vm_machdep.c | 89 |
1 files changed, 88 insertions, 1 deletions
diff --git a/sys/amd64/amd64/vm_machdep.c b/sys/amd64/amd64/vm_machdep.c index 78f16ae..7e3b32a 100644 --- a/sys/amd64/amd64/vm_machdep.c +++ b/sys/amd64/amd64/vm_machdep.c @@ -38,7 +38,7 @@ * * from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91 * Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$ - * $Id: vm_machdep.c,v 1.105 1998/03/23 19:52:42 jlemon Exp $ + * $Id: vm_machdep.c,v 1.106 1998/05/16 14:44:11 kato Exp $ */ #include "npx.h" @@ -87,6 +87,13 @@ #include <i386/isa/isa.h> #endif +static void cpu_reset_real __P((void)); +#ifdef SMP +static void cpu_reset_proxy __P((void)); +static u_int cpu_reset_proxyid; +static volatile u_int cpu_reset_proxy_active; +#endif + #ifdef BOUNCE_BUFFERS static vm_offset_t vm_bounce_kva __P((int size, int waitok)); @@ -838,9 +845,89 @@ vunmapbuf(bp) /* * Force reset the processor by invalidating the entire address space! */ + +#ifdef SMP +static void +cpu_reset_proxy() +{ + u_int saved_mp_lock; + + cpu_reset_proxy_active = 1; + while (cpu_reset_proxy_active == 1) + ; /* Wait for other cpu to disable interupts */ + saved_mp_lock = mp_lock; + mp_lock = 1; + printf("cpu_reset_proxy: Grabbed mp lock for BSP\n"); + cpu_reset_proxy_active = 3; + while (cpu_reset_proxy_active == 3) + ; /* Wait for other cpu to enable interrupts */ + stop_cpus((1<<cpu_reset_proxyid)); + printf("cpu_reset_proxy: Stopped CPU %d\n", cpu_reset_proxyid); + DELAY(1000000); + cpu_reset_real(); +} +#endif + void cpu_reset() { +#ifdef SMP + if (smp_active == 0) { + cpu_reset_real(); + /* NOTREACHED */ + } else { + + u_int map; + int cnt; + printf("cpu_reset called on cpu#%d\n",cpuid); + + map = other_cpus & ~ stopped_cpus; + + if (map != 0) { + printf("cpu_reset: Stopping other CPUs\n"); + stop_cpus(map); /* Stop all other CPUs */ + } + + if (cpuid == 0) { + DELAY(1000000); + cpu_reset_real(); + /* NOTREACHED */ + } else { + /* We are not BSP (CPU #0) */ + + cpu_reset_proxyid = cpuid; + cpustop_restartfunc = cpu_reset_proxy; + 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"); + __asm __volatile("cli" : : : "memory"); + cpu_reset_proxy_active = 2; + cnt = 0; + while (cpu_reset_proxy_active == 2 && cnt < 10000000) + cnt++; /* Do nothing */ + if (cpu_reset_proxy_active == 2) { + printf("cpu_reset: BSP did not grab mp lock\n"); + cpu_reset_real(); /* XXX: Bogus ? */ + } + cpu_reset_proxy_active = 4; + __asm __volatile("sti" : : : "memory"); + while (1); + /* NOTREACHED */ + } + } +#else + cpu_reset_real(); +#endif +} + +static void +cpu_reset_real() +{ #ifdef PC98 /* |
