void
dvma_init()
{
vm_offset_t segmap_addr;
/*
* Create phys_map covering the entire DVMA space,
* then allocate the segment pool from that. The
* remainder will be used as the DVMA page pool.
*/
phys_map = uvm_map_create(pmap_kernel(),
DVMA_MAP_BASE, DVMA_MAP_END, 1);
if (phys_map == NULL)
panic("unable to create DVMA map");
/*
* Reserve the DVMA space used for segment remapping.
* The remainder of phys_map is used for DVMA scratch
* memory pages (i.e. driver control blocks, etc.)
*/
segmap_addr = uvm_km_valloc_wait(phys_map, dvma_segmap_size);
if (segmap_addr != DVMA_MAP_BASE)
panic("dvma_init: unable to allocate DVMA segments");
/*
* Create the VM pool used for mapping whole segments
* into DVMA space for the purpose of data transfer.
*/
rminit(dvma_segmap, dvma_segmap_size, segmap_addr,
"dvma_segmap", NUM_DVMA_SEGS);
}
/*
* uvm_km_suballoc: allocate a submap in the kernel map. once a submap
* is allocated all references to that area of VM must go through it. this
* allows the locking of VAs in kernel_map to be broken up into regions.
*
* => if `fixed' is true, *min specifies where the region described
* by the submap must start
* => if submap is non NULL we use that as the submap, otherwise we
* alloc a new map
*/
struct vm_map *
uvm_km_suballoc(struct vm_map *map, vaddr_t *min, vaddr_t *max, vsize_t size,
int flags, boolean_t fixed, struct vm_map *submap)
{
int mapflags = UVM_FLAG_NOMERGE | (fixed ? UVM_FLAG_FIXED : 0);
size = round_page(size); /* round up to pagesize */
/*
* first allocate a blank spot in the parent map
*/
if (uvm_map(map, min, size, NULL, UVM_UNKNOWN_OFFSET, 0,
UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_NONE,
UVM_ADV_RANDOM, mapflags)) != 0) {
panic("uvm_km_suballoc: unable to allocate space in parent map");
}
/*
* set VM bounds (min is filled in by uvm_map)
*/
*max = *min + size;
/*
* add references to pmap and create or init the submap
*/
pmap_reference(vm_map_pmap(map));
if (submap == NULL) {
submap = uvm_map_create(vm_map_pmap(map), *min, *max, flags);
if (submap == NULL)
panic("uvm_km_suballoc: unable to create submap");
} else {
uvm_map_setup(submap, *min, *max, flags);
submap->pmap = vm_map_pmap(map);
}
/*
* now let uvm_map_submap plug in it...
*/
if (uvm_map_submap(map, *min, *max, submap) != 0)
panic("uvm_km_suballoc: submap allocation failed");
return(submap);
}
void
dvma_init(void)
{
vaddr_t segmap_addr;
/*
* Create phys_map covering the entire DVMA space,
* then allocate the segment pool from that. The
* remainder will be used as the DVMA page pool.
*
* Note that no INTRSAFE is needed here because the
* dvma_extent manages things handled in interrupt
* context.
*/
phys_map = uvm_map_create(pmap_kernel(),
DVMA_MAP_BASE, DVMA_MAP_END, 0);
if (phys_map == NULL)
panic("unable to create DVMA map");
/*
* Reserve the DVMA space used for segment remapping.
* The remainder of phys_map is used for DVMA scratch
* memory pages (i.e. driver control blocks, etc.)
*/
segmap_addr = uvm_km_alloc(phys_map, dvma_segmap_size, 0,
UVM_KMF_VAONLY | UVM_KMF_WAITVA);
if (segmap_addr != DVMA_MAP_BASE)
panic("dvma_init: unable to allocate DVMA segments");
/*
* Create the VM pool used for mapping whole segments
* into DVMA space for the purpose of data transfer.
*/
dvma_extent = extent_create("dvma", segmap_addr,
segmap_addr + (dvma_segmap_size - 1), M_DEVBUF,
NULL, 0, EX_NOCOALESCE|EX_NOWAIT);
}
/*
* Machine-dependent startup code
*/
void
cpu_startup()
{
caddr_t v;
int sz;
#ifdef DEBUG
extern int pmapdebug;
int opmapdebug = pmapdebug;
#endif
vaddr_t minaddr, maxaddr;
extern struct user *proc0paddr;
#ifdef DEBUG
pmapdebug = 0;
#endif
if (CPU_ISSUN4M) {
extern int stackgap_random;
stackgap_random = STACKGAP_RANDOM_SUN4M;
}
/*
* fix message buffer mapping, note phys addr of msgbuf is 0
*/
pmap_map(MSGBUF_VA, 0, MSGBUFSIZE, VM_PROT_READ|VM_PROT_WRITE);
initmsgbuf((caddr_t)(MSGBUF_VA + (CPU_ISSUN4 ? 4096 : 0)), MSGBUFSIZE);
proc0.p_addr = proc0paddr;
/*
* Good {morning,afternoon,evening,night}.
*/
printf(version);
/*identifycpu();*/
printf("real mem = %u (%uMB)\n", ptoa(physmem),
ptoa(physmem)/1024/1024);
/*
* Find out how much space we need, allocate it,
* and then give everything true virtual addresses.
*/
sz = (int)allocsys((caddr_t)0);
if ((v = (caddr_t)uvm_km_alloc(kernel_map, round_page(sz))) == 0)
panic("startup: no room for tables");
if (allocsys(v) - v != sz)
panic("startup: table size inconsistency");
/*
* Determine how many buffers to allocate.
* We allocate bufcachepercent% of memory for buffer space.
*/
if (bufpages == 0)
bufpages = physmem * bufcachepercent / 100;
/* Restrict to at most 25% filled kvm */
if (bufpages >
(VM_MAX_KERNEL_ADDRESS-VM_MIN_KERNEL_ADDRESS) / PAGE_SIZE / 4)
bufpages = (VM_MAX_KERNEL_ADDRESS-VM_MIN_KERNEL_ADDRESS) /
PAGE_SIZE / 4;
/*
* Allocate a submap for exec arguments. This map effectively
* limits the number of processes exec'ing at any time.
*/
minaddr = vm_map_min(kernel_map);
exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);
/*
* Allocate a map for physio. Others use a submap of the kernel
* map, but we want one completely separate, even though it uses
* the same pmap.
*/
dvma_base = CPU_ISSUN4M ? DVMA4M_BASE : DVMA_BASE;
dvma_end = CPU_ISSUN4M ? DVMA4M_END : DVMA_END;
#if defined(SUN4M)
if (CPU_ISSUN4M) {
/*
* The DVMA space we want partially overrides kernel_map.
* Allocate it in kernel_map as well to prevent it from being
* used for other things.
*/
if (uvm_map(kernel_map, &dvma_base,
vm_map_max(kernel_map) - dvma_base,
NULL, UVM_UNKNOWN_OFFSET, 0,
UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
UVM_ADV_NORMAL, 0)))
panic("startup: can not steal dvma map");
}
#endif
phys_map = uvm_map_create(pmap_kernel(), dvma_base, dvma_end,
VM_MAP_INTRSAFE);
if (phys_map == NULL)
panic("unable to create DVMA map");
/*
* Allocate DVMA space and dump into a privately managed
* resource map for double mappings which is usable from
* interrupt contexts.
*/
if (uvm_km_valloc_wait(phys_map, (dvma_end-dvma_base)) != dvma_base)
panic("unable to allocate from DVMA map");
dvmamap_extent = extent_create("dvmamap", dvma_base, dvma_end,
M_DEVBUF, NULL, 0, EX_NOWAIT);
if (dvmamap_extent == 0)
panic("unable to allocate extent for dvma");
#ifdef DEBUG
pmapdebug = opmapdebug;
#endif
printf("avail mem = %lu (%luMB)\n", ptoa(uvmexp.free),
ptoa(uvmexp.free)/1024/1024);
/*
* Set up buffers, so they can be used to read disk labels.
*/
bufinit();
/* Early interrupt handlers initialization */
intr_init();
}
/*
* Machine-dependent startup code
*/
void
cpu_startup()
{
#ifdef DEBUG
extern int pmapdebug;
int opmapdebug = pmapdebug;
#endif
vaddr_t minaddr, maxaddr;
extern struct user *proc0paddr;
#ifdef DEBUG
pmapdebug = 0;
#endif
/*
* fix message buffer mapping
*/
pmap_map(MSGBUF_VA, MSGBUF_PA, MSGBUF_PA + MSGBUFSIZE, UVM_PROT_RW);
initmsgbuf((caddr_t)(MSGBUF_VA + (CPU_ISSUN4 ? 4096 : 0)), MSGBUFSIZE);
proc0.p_addr = proc0paddr;
/* I would print this earlier, but I want it in the message buffer */
if (kap_maskcheck() == 0) {
printf("WARNING: KAP M2C3 or earlier mask detected.\n"
"THE PROCESSOR IN THIS MACHINE SUFFERS FROM SEVERE HARDWARE ISSUES.\n"
"M2C3 PROCESSORS MAY RUN RELIABLY ENOUGH, OLDER WILL DEFINITELY NOT.\n\n");
}
/*
* Good {morning,afternoon,evening,night}.
*/
printf(version);
/*identifycpu();*/
printf("real mem = %d (%dMB)\n", ptoa(physmem),
ptoa(physmem) / 1024 / 1024);
/*
* Allocate a submap for exec arguments. This map effectively
* limits the number of processes exec'ing at any time.
*/
minaddr = vm_map_min(kernel_map);
exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);
/*
* Allocate a map for physio. Others use a submap of the kernel
* map, but we want one completely separate, even though it uses
* the same pmap.
*/
dvma_base = CPU_ISSUN4M ? DVMA4M_BASE : DVMA_BASE;
dvma_end = CPU_ISSUN4M ? DVMA4M_END : DVMA_END;
phys_map = uvm_map_create(pmap_kernel(), dvma_base, dvma_end,
VM_MAP_INTRSAFE);
if (phys_map == NULL)
panic("unable to create DVMA map");
/*
* Allocate DVMA space and dump into a privately managed
* resource map for double mappings which is usable from
* interrupt contexts.
*/
if (uvm_km_valloc_wait(phys_map, (dvma_end-dvma_base)) != dvma_base)
panic("unable to allocate from DVMA map");
dvmamap_extent = extent_create("dvmamap", dvma_base, dvma_end,
M_DEVBUF, NULL, 0, EX_NOWAIT);
if (dvmamap_extent == 0)
panic("unable to allocate extent for dvma");
#ifdef DEBUG
pmapdebug = opmapdebug;
#endif
printf("avail mem = %lu (%luMB)\n", ptoa(uvmexp.free),
ptoa(uvmexp.free) / 1024 / 1024);
/*
* Set up buffers, so they can be used to read disk labels.
*/
bufinit();
/* Early interrupt handlers initialization */
intr_init();
}