static paddr_t
getphysmem(u_long size)
{
struct memarr *pmemarr; /* physical memory regions */
int npmemarr; /* number of entries in pmemarr */
struct memarr *mp;
int i;
extern char start[]; /* top of stack (see srt0.S) */
/*
* Find the physical memory area that's in use by the boot loader.
* Our stack grows down from label `start'; assume we need no more
* than 16K of stack space.
* The top of the boot loader is the next 4MB boundary.
*/
if (pmap_extract((vaddr_t)start - (16*1024), &bstart) != 0)
return ((paddr_t)-1);
bend = roundup(bstart, 0x400000);
/*
* Get available physical memory from the prom.
*/
npmemarr = prom_makememarr(NULL, 0, MEMARR_AVAILPHYS);
pmemarr = alloc(npmemarr*sizeof(struct memarr));
if (pmemarr == NULL)
return ((paddr_t)-1);
npmemarr = prom_makememarr(pmemarr, npmemarr, MEMARR_AVAILPHYS);
/*
* Find a suitable loading address.
*/
for (mp = pmemarr, i = npmemarr; --i >= 0; mp++) {
paddr_t pa = (paddr_t)pmemarr[i].addr;
u_long len = (u_long)pmemarr[i].len;
/* Check whether it will fit in front of us */
if (pa < bstart && len >= size && (bstart - pa) >= size)
return (pa);
/* Skip the boot program memory */
if (pa < bend) {
if (len < bend - pa)
/* Not large enough */
continue;
/* Shrink this segment */
len -= bend - pa;
pa = bend;
}
/* Does it fit in the remainder of this segment? */
if (len >= size)
return (pa);
}
return ((paddr_t)-1);
}
static paddr_t
getphysmem(u_long size)
{
struct memarr *pmemarr; /* physical memory regions */
u_int npmemarr; /* number of entries in pmemarr */
struct memarr *mp;
int i;
#ifdef DEBUG
static int arrdpy;
#endif
/*
* Get available physical memory from the prom.
*/
npmemarr = prom_makememarr(NULL, 0, MEMARR_AVAILPHYS);
pmemarr = alloc(npmemarr*sizeof(struct memarr));
if (pmemarr == NULL)
return ((paddr_t)-1);
npmemarr = prom_makememarr(pmemarr, npmemarr, MEMARR_AVAILPHYS);
#ifdef DEBUG
if (arrdpy == 0) {
arrdpy = 1;
printf("Available physical memory:\n");
for (mp = pmemarr, i = (int)npmemarr; --i >= 0; mp++) {
uint64_t addr;
addr = pmemarr[i].addr_hi;
addr <<= 32;
addr |= pmemarr[i].addr_lo;
printf("%p at 0x%llx\n", pmemarr[i].len, addr);
}
}
#endif
/*
* Find a suitable loading address.
*/
for (mp = pmemarr, i = (int)npmemarr; --i >= 0; mp++) {
paddr_t pa;
u_long len;
/* Skip memory ranges the kernel can't use yet on sun4d */
if (pmemarr[i].addr_hi != 0)
continue;
pa = (paddr_t)pmemarr[i].addr_lo;
if (pa >= 0x80000000)
continue;
len = (u_long)pmemarr[i].len;
if (len >= 0x80000000)
len = 0x80000000;
if (pa + len > 0x80000000)
len = 0x80000000 - pa;
if (len < size)
continue;
/* Check whether it will fit in front of us */
if (pa < bstart && len >= size && (bstart - pa) >= size)
return (pa);
/* Skip the boot program memory */
if (pa < bend) {
if (len < bend - pa)
/* Not large enough */
continue;
/* Shrink this segment */
len -= bend - pa;
pa = bend;
}
/* Does it fit in the remainder of this segment? */
if (len >= size)
return (pa);
}
return ((paddr_t)-1);
}
