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resync with mvme68k

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This commit is contained in:
dbj 2001-04-02 05:28:38 +00:00
parent 315c0a92f9
commit 403a09df61
1 changed files with 51 additions and 33 deletions
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84
sys/arch/next68k/next68k/pmap_bootstrap.c
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@ -1,11 +1,10 @@
/* $NetBSD: pmap_bootstrap.c,v 1.8 2001/03/31 09:05:21 dbj Exp $ */
/* $NetBSD: pmap_bootstrap.c,v 1.9 2001/04/02 05:28:38 dbj Exp $ */
/*
* This file was taken from mvme68k/mvme68k/pmap_bootstrap.c
* should probably be re-synced when needed.
* Darrin B Jewell <jewell@mit.edu> Fri Aug 28 03:22:07 1998
* original cvs id:
* NetBSD: pmap_bootstrap.c,v 1.10 1998/08/22 10:55:35 scw Exp
* cvs id of source for the most recent syncing:
* NetBSD: pmap_bootstrap.c,v 1.15 2000/11/20 19:35:30 scw Exp
*/
@ -61,7 +60,7 @@
#define RELOC(v, t) *((t*)((u_int)&(v) + firstpa))
extern char *kernel_text, *etext;
extern char *etext;
extern int Sysptsize;
extern char *proc0paddr;
extern st_entry_t *Sysseg;
@ -75,10 +74,13 @@ extern phys_ram_seg_t mem_clusters[];
extern int mem_cluster_cnt;
extern paddr_t msgbufpa;
extern int protection_codes[];
#ifdef HAVEVAC
#ifdef M68K_MMU_HP
extern int pmap_aliasmask;
#endif
void pmap_bootstrap __P((paddr_t, paddr_t));
/*
* Special purpose kernel virtual addresses, used for mapping
* physical pages for a variety of temporary or permanent purposes:
@ -89,9 +91,6 @@ extern int pmap_aliasmask;
*/
caddr_t CADDR1, CADDR2, vmmap;
extern caddr_t msgbufaddr;
#ifdef MAP_LEDATABUF
extern void *ledatabuf; /* XXXCDC */
#endif
/*
* Bootstrap the VM system.
@ -156,9 +155,11 @@ pmap_bootstrap(nextpa, firstpa)
* The KVA corresponding to any of these PAs is:
* (PA - firstpa + KERNBASE).
*/
#if defined(M68040) || defined(M68060)
if (RELOC(mmutype, int) == MMU_68040)
kstsize = MAXKL2SIZE / (NPTEPG/SG4_LEV2SIZE);
else
#endif
kstsize = 1;
kstpa = nextpa;
nextpa += kstsize * NBPG;
@ -181,12 +182,6 @@ pmap_bootstrap(nextpa, firstpa)
nextpa += NBPG;
p0upa = nextpa;
nextpa += USPACE;
#ifdef MAP_LEDATABUF
{ /* XXXCDC */
ledatabuf = (void *)nextpa;
nextpa += 4 * NBPG;
} /* XXXCDC */
#endif
/*
* Clear all PTEs to zero
@ -222,6 +217,7 @@ pmap_bootstrap(nextpa, firstpa)
* working. The 224mb of address space that this allows will most
* likely be insufficient in the future (at least for the kernel).
*/
#if defined(M68040) || defined(M68060)
if (RELOC(mmutype, int) == MMU_68040) {
int num;
@ -289,9 +285,21 @@ pmap_bootstrap(nextpa, firstpa)
*pte++ = protopte;
protopte += NBPG;
}
pte = &((u_int *)kptmpa)[NPTEPG-1];
/*
* Invalidate all but the last remaining entry.
*/
epte = &((u_int *)kptmpa)[NPTEPG-1];
while (pte < epte) {
*pte++ = PG_NV;
}
/*
* Initialize the last to point to the page
* table page allocated earlier.
*/
*pte = lkptpa | PG_RW | PG_CI | PG_V;
} else {
} else
#endif /* M68040 || M68060 */
{
/*
* Map the page table pages in both the HW segment table
* and the software Sysptmap. Note that Sysptmap is also
@ -345,21 +353,22 @@ pmap_bootstrap(nextpa, firstpa)
while (pte < epte)
*pte++ = PG_NV;
/*
* Validate PTEs for kernel text (RO)
* Validate PTEs for kernel text (RO). The first page
* of kernel text remains invalid; see locore.s
*/
pte = &((u_int *)kptpa)[m68k_btop(KERNBASE)];
pte = &((u_int *)kptpa)[m68k_btop(KERNBASE + NBPG)];
epte = &pte[m68k_btop(m68k_trunc_page(&etext))];
protopte = firstpa | PG_RO | PG_V;
protopte = (firstpa + NBPG) | PG_RO | PG_V;
while (pte < epte) {
*pte++ = protopte;
protopte += NBPG;
}
/*
* Validate PTEs for kernel data/bss, dynamic data allocated
* by us so far (nextpa - firstpa bytes), and pages for proc0
* by us so far (kstpa - firstpa bytes), and pages for proc0
* u-area and page table allocated below (RW).
*/
epte = &((u_int *)kptpa)[m68k_btop(nextpa - firstpa)];
epte = &((u_int *)kptpa)[m68k_btop(kstpa - firstpa)];
protopte = (protopte & ~PG_PROT) | PG_RW;
/*
* Enable copy-back caching of data pages
@ -370,16 +379,21 @@ pmap_bootstrap(nextpa, firstpa)
*pte++ = protopte;
protopte += NBPG;
}
#ifdef MAP_LEDATABUF
{ /* XXXCDC -- uncache lebuf */
u_int *lepte = &((u_int *)kptpa)[m68k_btop(ledatabuf)];
lepte[0] = lepte[0] | PG_CI;
lepte[1] = lepte[1] | PG_CI;
lepte[2] = lepte[2] | PG_CI;
lepte[3] = lepte[3] | PG_CI;
} /* XXXCDC yuck */
#endif
/*
* map the kernel segment table cache invalidated for
* these machines (for the 68040 not strictly necessary, but
* recommended by Motorola; for the 68060 mandatory)
*/
epte = &((u_int *)kptpa)[m68k_btop(nextpa - firstpa)];
protopte = (protopte & ~PG_PROT) | PG_RW;
if (RELOC(mmutype, int) == MMU_68040) {
protopte &= ~PG_CCB;
protopte |= PG_CIN;
}
while (pte < epte) {
*pte++ = protopte;
protopte += NBPG;
}
/*
* Finally, validate the internal IO space PTEs (RW+CI).
* We do this here since the 320/350 MMU registers (also
@ -534,7 +548,9 @@ pmap_bootstrap(nextpa, firstpa)
/*
* Reserve space at the end of on-board RAM for the message
* buffer. We force it into on-board RAM because VME RAM
* isn't cached by the hardware (s-l-o-w).
* gets cleared very early on in locore.s (to initialise
* parity on boards that need it). This would clobber the
* messages from a previous running NetBSD system.
*/
RELOC(phys_seg_list[0].ps_end, paddr_t) -=
m68k_round_page(MSGBUFSIZE);
@ -587,6 +603,7 @@ pmap_bootstrap(nextpa, firstpa)
simple_lock_init(&kpm->pm_lock);
kpm->pm_count = 1;
kpm->pm_stpa = (st_entry_t *)kstpa;
#if defined(M68040) || defined(M68060)
/*
* For the 040 we also initialize the free level 2
* descriptor mask noting that we have used:
@ -608,6 +625,7 @@ pmap_bootstrap(nextpa, firstpa)
num++)
kpm->pm_stfree &= ~l2tobm(num);
}
#endif
}
/*