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Alpha 8200: Redo console attachment to be more 'normal'. Make sure the

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halt function *stays* halted.
This commit is contained in:
Matt Jacob 2000-03-18 08:03:48 +00:00
parent d0366c9108
commit c7790ceee2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=58215
1 changed files with 59 additions and 66 deletions
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125
sys/alpha/alpha/prom.c
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@ -49,12 +49,7 @@
#include <machine/prom.h>
#include <machine/vmparam.h>
/* XXX this is to fake out the console routines, while booting. */
struct consdev promcons = { NULL, NULL, NULL, promcngetc, promcncheckc, promcnputc,
NULL, 0 /* makedev(97,0) */, CN_NORMAL };
struct rpb *hwrpb;
int alpha_console;
extern struct prom_vec prom_dispatch_v;
@ -100,6 +95,8 @@ init_prom_interface(rpb)
prom_dispatch_v.routine = c->crb_v_dispatch->entry_va;
}
static int alpha_console;
void
init_bootstrap_console()
{
@ -113,71 +110,12 @@ init_bootstrap_console()
prom_getenv(PROM_E_TTY_DEV, buf, 4);
alpha_console = buf[0] - '0';
#endif
/* XXX fake out the console routines, for now */
promcons.cn_dev = makedev(97, 0);
cn_tab = &promcons;
promcnattach(alpha_console);
}
static int enter_prom __P((void));
static void leave_prom __P((int));
#ifdef _PMAP_MAY_USE_PROM_CONSOLE
static void prom_cache_sync __P((void));
#endif
static int
enter_prom()
{
int s = splhigh();
pt_entry_t *lev1map;
if (!prom_mapped) {
#ifdef SIMOS
/*
* SimOS console uses floating point.
*/
if (curproc != fpcurproc) {
alpha_pal_wrfen(1);
if (fpcurproc)
savefpstate(&fpcurproc->p_addr->u_pcb.pcb_fp);
fpcurproc = curproc;
restorefpstate(&fpcurproc->p_addr->u_pcb.pcb_fp);
}
#endif
if (!pmap_uses_prom_console())
panic("enter_prom");
lev1map = rom_lev1map(); /* XXX */
saved_pte[0] = lev1map[0]; /* XXX */
lev1map[0] = rom_pte; /* XXX */
prom_cache_sync(); /* XXX */
}
return s;
}
static void
leave_prom __P((s))
int s;
{
pt_entry_t *lev1map;
if (!prom_mapped) {
if (!pmap_uses_prom_console())
panic("leave_prom");
lev1map = rom_lev1map(); /* XXX */
lev1map[0] = saved_pte[0]; /* XXX */
prom_cache_sync(); /* XXX */
}
splx(s);
}
static void
prom_cache_sync __P((void))
{
ALPHA_TBIA();
alpha_pal_imb();
}
/*
* promcnputc:
@ -250,6 +188,60 @@ promcncheckc(dev)
return (-1);
}
static int
enter_prom()
{
int s = splhigh();
pt_entry_t *lev1map;
if (!prom_mapped) {
#ifdef SIMOS
/*
* SimOS console uses floating point.
*/
if (curproc != fpcurproc) {
alpha_pal_wrfen(1);
if (fpcurproc)
savefpstate(&fpcurproc->p_addr->u_pcb.pcb_fp);
fpcurproc = curproc;
restorefpstate(&fpcurproc->p_addr->u_pcb.pcb_fp);
}
#endif
if (!pmap_uses_prom_console())
panic("enter_prom");
lev1map = rom_lev1map(); /* XXX */
saved_pte[0] = lev1map[0]; /* XXX */
lev1map[0] = rom_pte; /* XXX */
prom_cache_sync(); /* XXX */
}
return s;
}
static void
leave_prom __P((s))
int s;
{
pt_entry_t *lev1map;
if (!prom_mapped) {
if (!pmap_uses_prom_console())
panic("leave_prom");
lev1map = rom_lev1map(); /* XXX */
lev1map[0] = saved_pte[0]; /* XXX */
prom_cache_sync(); /* XXX */
}
splx(s);
}
static void
prom_cache_sync __P((void))
{
ALPHA_TBIA();
alpha_pal_imb();
}
int
prom_getenv(id, buf, len)
int id, len;
@ -297,7 +289,8 @@ prom_halt(halt)
/*
* Halt the machine.
*/
alpha_pal_halt();
for (;;)
alpha_pal_halt();
}
u_int64_t