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-rw-r--r--sys/arch/mvme68k/mvme68k/pmap_bootstrap.c505
1 files changed, 48 insertions, 457 deletions
diff --git a/sys/arch/mvme68k/mvme68k/pmap_bootstrap.c b/sys/arch/mvme68k/mvme68k/pmap_bootstrap.c
index aabf3ea5cef..f8ae7787af2 100644
--- a/sys/arch/mvme68k/mvme68k/pmap_bootstrap.c
+++ b/sys/arch/mvme68k/mvme68k/pmap_bootstrap.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: pmap_bootstrap.c,v 1.14 2002/02/22 22:45:34 miod Exp $ */
+/* $OpenBSD: pmap_bootstrap.c,v 1.15 2002/02/23 04:58:28 miod Exp $ */
/*
* Copyright (c) 1995 Theo de Raadt
@@ -79,477 +79,68 @@
#include <uvm/uvm_extern.h>
-#define RELOC(v, t) *((t*)((u_int)&(v) + firstpa))
-
-extern char *etext;
-extern int Sysptsize;
-extern char *extiobase, *proc0paddr;
-extern st_entry_t *Sysseg;
-extern pt_entry_t *Sysptmap, *Sysmap;
-
-extern int maxmem, physmem;
-extern paddr_t avail_start, avail_end;
-extern vaddr_t virtual_avail, virtual_end;
-extern vsize_t mem_size;
-#ifdef M68K_MMU_HP
-extern int pmap_aliasmask;
-#endif
-
char *iiomapbase;
int iiomapsize;
#define ETHERPAGES 16
void *etherbuf;
int etherlen;
-#define MACHINE_IIOMAPSIZE RELOC(iiomapsize, int)
-#define MACHINE_INTIOBASE RELOC(iiomapbase, int)
-
-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:
- *
- * CADDR1, CADDR2: pmap zero/copy operations
- * vmmap: /dev/mem, crash dumps, parity error checking
- * ledbase: SPU LEDs
- * msgbufp: kernel message buffer
- */
-caddr_t CADDR1, CADDR2, vmmap;
-
-/*
- * Bootstrap the VM system.
- *
- * Called with MMU off so we must relocate all global references by `firstpa'
- * (don't call any functions here!) `nextpa' is the first available physical
- * memory address. Returns an updated first PA reflecting the memory we
- * have allocated. MMU is still off when we return.
- *
- * XXX assumes sizeof(u_int) == sizeof(pt_entry_t)
- * XXX a PIC compiler would make this much easier.
- */
-void
-pmap_bootstrap(nextpa, firstpa)
- paddr_t nextpa;
- paddr_t firstpa;
-{
- paddr_t kstpa, kptpa, iiopa, eiopa, kptmpa, lkptpa, p0upa;
- u_int nptpages, kstsize;
- st_entry_t protoste, *ste;
- pt_entry_t protopte, *pte, *epte;
-
- /*
- * Calculate important physical addresses:
- *
- * kstpa kernel segment table 1 page (020/030)
- * N pages (040/060)
- *
- * kptpa statically allocated
- * kernel PT pages Sysptsize+ pages
- *
- * iiopa internal IO space
- * PT pages MACHINE_IIOMAPSIZE pages
- *
- * eiopa external IO space
- * PT pages EIOMAPSIZE pages
- *
- * [ Sysptsize is the number of pages of PT, MACHINE_IIOMAPSIZE and
- * EIOMAPSIZE are the number of PTEs, hence we need to round
- * the total to a page boundary with IO maps at the end. ]
- *
- * kptmpa kernel PT map 1 page
- *
- * lkptpa last kernel PT page 1 page
- *
- * p0upa proc 0 u-area UPAGES pages
- *
- * The KVA corresponding to any of these PAs is:
- * (PA - firstpa + KERNBASE).
- */
- if (RELOC(mmutype, int) <= MMU_68040)
- kstsize = MAXKL2SIZE / (NPTEPG/SG4_LEV2SIZE);
- else
- kstsize = 1;
- kstpa = nextpa;
- nextpa += kstsize * NBPG;
- kptpa = nextpa;
- nptpages = RELOC(Sysptsize, int) +
- (MACHINE_IIOMAPSIZE + EIOMAPSIZE + NPTEPG - 1) / NPTEPG;
- nextpa += nptpages * NBPG;
- eiopa = nextpa - EIOMAPSIZE * sizeof(pt_entry_t);
- iiopa = eiopa - MACHINE_IIOMAPSIZE * sizeof(pt_entry_t);
- kptmpa = nextpa;
- nextpa += NBPG;
- lkptpa = nextpa;
- nextpa += NBPG;
- p0upa = nextpa;
- nextpa += USPACE;
+extern char *extiobase;
+extern int maxmem;
- RELOC(etherbuf, void *) = (void *)nextpa;
- nextpa += ETHERPAGES * NBPG;
+#define RELOC(v, t) *((t*)((u_int)&(v) + firstpa))
+#define PA2VA(v, t) *((t*)((u_int)&(v)))
- /*
- * Initialize segment table and kernel page table map.
- *
- * On 68030s and earlier MMUs the two are identical except for
- * the valid bits so both are initialized with essentially the
- * same values. On the 680[46]0, which have a mandatory 3-level
- * structure, the segment table holds the level 1 table and part
- * (or all) of the level 2 table and hence is considerably
- * different. Here the first level consists of 128 descriptors
- * (512 bytes) each mapping 32mb of address space. Each of these
- * points to blocks of 128 second level descriptors (512 bytes)
- * each mapping 256kb. Note that there may be additional "segment
- * table" pages depending on how large MAXKL2SIZE is.
- *
- * Portions of the last segment of KVA space (0xFFF00000 -
- * 0xFFFFFFFF) are mapped for a couple of purposes. 0xFFF00000
- * for UPAGES is used for mapping the current process u-area
- * (u + kernel stack). The very last page (0xFFFFF000) is mapped
- * to the last physical page of RAM to give us a region in which
- * PA == VA. We use the first part of this page for enabling
- * and disabling mapping. The last part of this page also contains
- * info left by the boot ROM.
- *
- * XXX cramming two levels of mapping into the single "segment"
- * table on the 68040 is intended as a temporary hack to get things
- * working. The 224mb of address space that this allows will most
- * likely be insufficient in the future (at least for the kernel).
- */
- if (RELOC(mmutype, int) <= MMU_68040) {
- int num;
+#define MACHINE_IIOMAPSIZE RELOC(iiomapsize, int)
+#define MACHINE_INTIOBASE RELOC(iiomapbase, int)
+#define MACHINE_EIOMAPSIZE EIOMAPSIZE
- /*
- * First invalidate the entire "segment table" pages
- * (levels 1 and 2 have the same "invalid" value).
- */
- pte = (u_int *)kstpa;
- epte = &pte[kstsize * NPTEPG];
- while (pte < epte)
- *pte++ = SG_NV;
- /*
- * Initialize level 2 descriptors (which immediately
- * follow the level 1 table). We need:
- * NPTEPG / SG4_LEV3SIZE
- * level 2 descriptors to map each of the nptpages+1
- * pages of PTEs. Note that we set the "used" bit
- * now to save the HW the expense of doing it.
- */
- num = (nptpages + 1) * (NPTEPG / SG4_LEV3SIZE);
- pte = &((u_int *)kstpa)[SG4_LEV1SIZE];
- epte = &pte[num];
- protoste = kptpa | SG_U | SG_RW | SG_V;
- while (pte < epte) {
- *pte++ = protoste;
- protoste += (SG4_LEV3SIZE * sizeof(st_entry_t));
- }
- /*
- * Initialize level 1 descriptors. We need:
- * roundup(num, SG4_LEV2SIZE) / SG4_LEV2SIZE
- * level 1 descriptors to map the `num' level 2's.
- */
- pte = (u_int *)kstpa;
- epte = &pte[roundup(num, SG4_LEV2SIZE) / SG4_LEV2SIZE];
- protoste = (u_int)&pte[SG4_LEV1SIZE] | SG_U | SG_RW | SG_V;
- while (pte < epte) {
- *pte++ = protoste;
- protoste += (SG4_LEV2SIZE * sizeof(st_entry_t));
- }
- /*
- * Initialize the final level 1 descriptor to map the last
- * block of level 2 descriptors.
- */
- ste = &((u_int *)kstpa)[SG4_LEV1SIZE-1];
- pte = &((u_int *)kstpa)[kstsize*NPTEPG - SG4_LEV2SIZE];
- *ste = (u_int)pte | SG_U | SG_RW | SG_V;
- /*
- * Now initialize the final portion of that block of
- * descriptors to map the "last PT page".
- */
- pte = &((u_int *)kstpa)[kstsize*NPTEPG - NPTEPG/SG4_LEV3SIZE];
- epte = &pte[NPTEPG/SG4_LEV3SIZE];
- protoste = lkptpa | SG_U | SG_RW | SG_V;
- while (pte < epte) {
- *pte++ = protoste;
- protoste += (SG4_LEV3SIZE * sizeof(st_entry_t));
- }
- /*
- * Initialize Sysptmap
- */
- pte = (u_int *)kptmpa;
- epte = &pte[nptpages+1];
- protopte = kptpa | PG_RW | PG_CI | PG_V | PG_U;
- while (pte < epte) {
- *pte++ = protopte;
- protopte += NBPG;
- }
- /*
- * Invalidate all but the last remaining entry.
- */
- epte = &((u_int *)kptmpa)[NPTEPG-1];
- while (pte < epte) {
- *pte++ = PG_NV | PG_U;
- }
- /*
- * Initialize the last to point to the page
- * table page allocated earlier.
- */
- *pte = lkptpa | PG_RW | PG_CI | PG_V | PG_U;
- } else {
- /*
- * Map the page table pages in both the HW segment table
- * and the software Sysptmap. Note that Sysptmap is also
- * considered a PT page hence the +1.
- */
- ste = (u_int *)kstpa;
- pte = (u_int *)kptmpa;
- epte = &pte[nptpages+1];
- protoste = kptpa | SG_RW | SG_V;
- protopte = kptpa | PG_RW | PG_CI | PG_V;
- while (pte < epte) {
- *ste++ = protoste;
- *pte++ = protopte;
- protoste += NBPG;
- protopte += NBPG;
- }
- /*
- * Invalidate all but the last remaining entries in both.
- */
- epte = &((u_int *)kptmpa)[NPTEPG-1];
- while (pte < epte) {
- *ste++ = SG_NV;
- *pte++ = PG_NV;
- }
- /*
- * Initialize the last to point to point to the page
- * table page allocated earlier.
- */
- *ste = lkptpa | SG_RW | SG_V;
- *pte = lkptpa | PG_RW | PG_CI | PG_V;
- }
- /*
- * Invalidate all but the final entry in the last kernel PT page
- * (u-area PTEs will be validated later). The final entry maps
- * the last page of physical memory.
- */
- pte = (u_int *)lkptpa;
- epte = &pte[NPTEPG-1];
- while (pte < epte)
- *pte++ = PG_NV;
-#ifdef MAXADDR
- /*
- * Temporary double-map for machines with physmem at the end of
- * memory
- */
- *pte = MAXADDR | PG_RW | PG_CI | PG_V | PG_U;
-#endif
- /*
- * Initialize kernel page table.
- * Start by invalidating the `nptpages' that we have allocated.
- */
- pte = (u_int *)kptpa;
- epte = &pte[nptpages * NPTEPG];
- while (pte < epte)
- *pte++ = PG_NV | PG_U;
+#define PMAP_MD_LOCALS /* nothing */
- /*
- * Validate PTEs for kernel text (RO). The first page
- * of kernel text remains invalid; see locore.s
- */
- pte = &((u_int *)kptpa)[m68k_btop(KERNBASE)];
- epte = &pte[m68k_btop(trunc_page((vaddr_t)&etext))];
-#if defined(KGDB) || defined(DDB)
- protopte = firstpa | PG_RW | PG_V | PG_U; /* XXX RW for now */
-#else
- protopte = firstpa | PG_RO | PG_V | PG_U;
-#endif
- *pte++ = firstpa | PG_NV; /* make *NULL fail in the kernel */
- protopte += NBPG;
- 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
- * u-area and page table allocated below (RW).
- */
- epte = &((u_int *)kptpa)[m68k_btop(nextpa - firstpa)];
- protopte = (protopte & ~PG_PROT) | PG_RW | PG_U;
- /*
- * Enable copy-back caching of data pages on 040, and write-through
- * caching on 060
- */
- if (RELOC(mmutype, int) == MMU_68040)
- protopte |= PG_CCB;
- else if (RELOC(mmutype, int) == MMU_68060)
- protopte |= PG_CWT;
- while (pte < epte) {
- *pte++ = protopte;
- protopte += NBPG;
- }
+#define PMAP_MD_RELOC1() \
+do { \
+ RELOC(etherbuf, void *) = (void *)nextpa; \
+ nextpa += ETHERPAGES * NBPG; \
+} while (0)
- pte = &((u_int *)kptpa)[m68k_btop(etherbuf)];
- epte = pte + ETHERPAGES;
- while (pte < epte) {
- *pte = (*pte & ~PG_CMASK) | PG_CIS | PG_U;
- pte++;
- }
- RELOC(etherlen, int) = ETHERPAGES * NBPG;
+#define PMAP_MD_MAPIOSPACE() \
+do { \
+ pte = &((u_int *)kptpa)[m68k_btop(etherbuf)]; \
+ epte = pte + ETHERPAGES; \
+ while (pte < epte) { \
+ *pte = (*pte & ~PG_CMASK) | PG_CIS | PG_U; \
+ pte++; \
+ } \
+ RELOC(etherlen, int) = ETHERPAGES * NBPG; \
+} while (0)
/*
- * Finally, validate the internal IO space PTEs (RW+CI).
- * We do this here since on hp300 machines with the HP MMU, the
- * the MMU registers (also used, but to a lesser extent, on other
- * models) are mapped in this range and it would be nice to be able
- * to access them after the MMU is turned on.
- */
- pte = (u_int *)iiopa;
- epte = (u_int *)eiopa;
- protopte = MACHINE_INTIOBASE | PG_RW | PG_CI | PG_V | PG_U;
- while (pte < epte) {
- *pte++ = protopte;
- protopte += NBPG;
- }
-
- /*
- * Calculate important exported kernel virtual addresses
- */
- /*
- * Sysseg: base of kernel segment table
- */
- RELOC(Sysseg, st_entry_t *) =
- (st_entry_t *)(kstpa - firstpa);
- /*
- * Sysptmap: base of kernel page table map
- */
- RELOC(Sysptmap, pt_entry_t *) =
- (pt_entry_t *)(kptmpa - firstpa);
- /*
- * Sysmap: kernel page table (as mapped through Sysptmap)
- * Immediately follows `nptpages' of static kernel page table.
- */
- RELOC(Sysmap, pt_entry_t *) =
- (pt_entry_t *)m68k_ptob(nptpages * NPTEPG);
- /*
- * intiobase, intiolimit: base and end of internal (DIO) IO space.
+ * intiobase, intiolimit: base and end of internal IO space.
* MACHINE_IIOMAPSIZE pages prior to external IO space at end of
* static kernel page table.
- */
- RELOC(intiobase, char *) =
- (char *)m68k_ptob(nptpages*NPTEPG - (MACHINE_IIOMAPSIZE+EIOMAPSIZE));
- RELOC(intiolimit, char *) =
- (char *)m68k_ptob(nptpages*NPTEPG - EIOMAPSIZE);
- /*
- * extiobase: base of external (DIO-II) IO space.
- * EIOMAPSIZE pages at the end of the static kernel page table.
- */
- RELOC(extiobase, char *) =
- (char *)m68k_ptob(nptpages*NPTEPG - EIOMAPSIZE);
-
- /*
- * Setup u-area for process 0.
- */
- /*
- * Zero the u-area.
- * NOTE: `pte' and `epte' aren't PTEs here.
- */
- pte = (u_int *)p0upa;
- epte = (u_int *)(p0upa + USPACE);
- while (pte < epte)
- *pte++ = 0;
- /*
- * Remember the u-area address so it can be loaded in the
- * proc struct p_addr field later.
- */
- RELOC(proc0paddr, char *) = (char *)(p0upa - firstpa);
-
- /*
- * VM data structures are now initialized, set up data for
- * the pmap module.
- *
- * Note about avail_end: msgbuf is initialized just after
- * avail_end in machdep.c. Since the last page is used
- * for rebooting the system (code is copied there and
- * excution continues from copied code before the MMU
- * is disabled), the msgbuf will get trounced between
- * reboots if it's placed in the last physical page.
- * To work around this, we move avail_end back one more
- * page so the msgbuf can be preserved.
- */
- RELOC(avail_start, paddr_t) = nextpa;
- RELOC(avail_end, paddr_t) = m68k_ptob(RELOC(maxmem, int)) -
- (round_page(MSGBUFSIZE) + m68k_ptob(1));
- RELOC(mem_size, vsize_t) = m68k_ptob(RELOC(physmem, int));
- RELOC(virtual_avail, vaddr_t) =
- VM_MIN_KERNEL_ADDRESS + (nextpa - firstpa);
- RELOC(virtual_end, vaddr_t) = VM_MAX_KERNEL_ADDRESS;
-
-#ifdef M68K_MMU_HP
- /*
- * Determine VA aliasing distance if any
- */
- if (RELOC(ectype, int) == EC_VIRT) {
- if (RELOC(machineid, int) == HP_320)
- RELOC(pmap_aliasmask, int) = 0x3fff; /* 16k */
- else if (RELOC(machineid, int) == HP_350)
- RELOC(pmap_aliasmask, int) = 0x7fff; /* 32k */
- }
-#endif
-
- /*
- * Kernel page/segment table allocated in locore,
- * just initialize pointers.
- */
- {
- struct pmap *kpm = &RELOC(kernel_pmap_store, struct pmap);
-
- kpm->pm_stab = RELOC(Sysseg, st_entry_t *);
- kpm->pm_ptab = RELOC(Sysmap, pt_entry_t *);
- simple_lock_init(&kpm->pm_lock);
- kpm->pm_count = 1;
- kpm->pm_stpa = (st_entry_t *)kstpa;
- /*
- * For the 040 and 060 we also initialize the free level 2
- * descriptor mask noting that we have used:
- * 0: level 1 table
- * 1 to `num': map page tables
- * MAXKL2SIZE-1: maps last-page page table
- */
- if (RELOC(mmutype, int) <= MMU_68040) {
- int num;
-
- kpm->pm_stfree = ~l2tobm(0);
- num = roundup((nptpages + 1) * (NPTEPG / SG4_LEV3SIZE),
- SG4_LEV2SIZE) / SG4_LEV2SIZE;
- while (num)
- kpm->pm_stfree &= ~l2tobm(num--);
- kpm->pm_stfree &= ~l2tobm(MAXKL2SIZE-1);
- for (num = MAXKL2SIZE;
- num < sizeof(kpm->pm_stfree)*NBBY;
- num++)
- kpm->pm_stfree &= ~l2tobm(num);
- }
- }
-
- /*
- * Allocate some fixed, special purpose kernel virtual addresses
- */
- {
- vaddr_t va = RELOC(virtual_avail, vaddr_t);
-
- RELOC(CADDR1, caddr_t) = (caddr_t)va;
- va += NBPG;
- RELOC(CADDR2, caddr_t) = (caddr_t)va;
- va += NBPG;
- RELOC(vmmap, caddr_t) = (caddr_t)va;
- va += NBPG;
- RELOC(msgbufp, struct msgbuf *) = (struct msgbuf *)va;
- va += MSGBUFSIZE;
- RELOC(virtual_avail, vaddr_t) = va;
- }
-}
+ * extiobase: base of external IO space.
+ * MACHINE_EIOMAPSIZE pages at the end of the static kernel page table.
+ */
+#define PMAP_MD_RELOC2() \
+do { \
+ RELOC(intiobase, char *) = \
+ (char *)m68k_ptob(nptpages * NPTEPG - \
+ (MACHINE_IIOMAPSIZE + MACHINE_EIOMAPSIZE)); \
+ RELOC(intiolimit, char *) = \
+ (char *)m68k_ptob(nptpages * NPTEPG - MACHINE_EIOMAPSIZE); \
+ RELOC(extiobase, char *) = \
+ (char *)m68k_ptob(nptpages * NPTEPG - MACHINE_EIOMAPSIZE); \
+} while (0)
+
+#define PMAP_MD_MEMSIZE() \
+do { \
+ RELOC(avail_end, paddr_t) = m68k_ptob(RELOC(maxmem, int)) - \
+ (round_page(MSGBUFSIZE) + m68k_ptob(1)); \
+} while (0)
+
+#define PMAP_MD_RELOC3() /* nothing */
+
+#include <m68k/m68k/pmap_bootstrap.c>
void
pmap_init_md()
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