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Code Issues Releases Activity

Close a window of time during early boot in which an interrupt would

Browse Source 
cause a panic.

Reported and tested (in another version) by: Jamey Wood <Jamey.Wood@Sun.COM>
This commit is contained in:
Thomas Moestl 2002-01-02 18:21:16 +00:00
parent 7065a2fdeb
commit 477609fb13
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=88822
1 changed files with 18 additions and 18 deletions
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36
sys/sparc64/sparc64/machdep.c
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@ -181,7 +181,6 @@ cpu_startup(void *arg)
bufinit();
vm_pager_bufferinit();
intr_init();
tick_start(clock, tick_hardclock);
EVENTHANDLER_REGISTER(shutdown_final, sparc64_shutdown_final, NULL,
@ -277,18 +276,8 @@ sparc64_init(caddr_t mdp, ofw_vec_t *vec)
*/
tick_stop();
/*
* Force trap level 1 and take over the trap table.
*/
wrpr(tl, 0, 1);
wrpr(tba, tl0_base, 0);
/*
* Map and initialize the message buffer (after setting trap table).
*/
for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off);
msgbufinit(msgbufp, MSGBUF_SIZE);
/* Initialize the interrupt tables. */
intr_init();
proc_linkup(&proc0);
/*
@ -296,6 +285,7 @@ sparc64_init(caddr_t mdp, ofw_vec_t *vec)
*/
proc0uarea = (struct user *)uarea0;
proc0kstack = (vm_offset_t)kstack0;
proc0.p_md.md_utrap = NULL;
proc0.p_uarea = proc0uarea;
proc0.p_stats = &proc0.p_uarea->u_stats;
thread0 = &proc0.p_thread;
@ -307,12 +297,15 @@ sparc64_init(caddr_t mdp, ofw_vec_t *vec)
LIST_INIT(&thread0->td_contested);
/*
* Setup preloaded globals.
* Force trap level 1 and take over the trap table.
*/
ps = rdpr(pstate);
wrpr(pstate, ps, PSTATE_IE);
wrpr(tl, 0, 1);
wrpr(tba, tl0_base, 0);
/*
* Setup preloaded globals.
* Normal %g7 points to the per-cpu data structure.
*/
__asm __volatile("mov %0, %%g7" : : "r" (&__pcpu));
@ -322,7 +315,7 @@ sparc64_init(caddr_t mdp, ofw_vec_t *vec)
* globals, %g6 points to the current thread's pcb, and %g7 points
* to the per-cpu data structure.
*/
wrpr(pstate, ps, PSTATE_AG);
wrpr(pstate, ps, PSTATE_AG | PSTATE_IE);
__asm __volatile("mov %0, %%g5" : : "r"
(&__pcpu.pc_alt_stack[ALT_STACK_SIZE - 1]));
__asm __volatile("mov %0, %%g6" : : "r" (thread0->td_pcb));
@ -332,7 +325,7 @@ sparc64_init(caddr_t mdp, ofw_vec_t *vec)
* Interrupt %g6 points to a per-cpu interrupt queue, %g7 points to
* the interrupt vector table.
*/
wrpr(pstate, ps, PSTATE_IG);
wrpr(pstate, ps, PSTATE_IG | PSTATE_IE);
__asm __volatile("mov %0, %%g6" : : "r" (&__pcpu.pc_iq));
__asm __volatile("mov %0, %%g7" : : "r" (&intr_vectors));
@ -340,11 +333,18 @@ sparc64_init(caddr_t mdp, ofw_vec_t *vec)
* MMU %g7 points to the user tsb. Initialize it to something sane
* here to catch invalid use.
*/
wrpr(pstate, ps, PSTATE_MG);
wrpr(pstate, ps, PSTATE_MG | PSTATE_IE);
__asm __volatile("mov %%g0, %%g7" : :);
wrpr(pstate, ps, 0);
/*
* Map and initialize the message buffer (after setting trap table).
*/
for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off);
msgbufinit(msgbufp, MSGBUF_SIZE);
/*
* Initialize curthread so that mutexes work.
*/