diff options
Diffstat (limited to 'sys/vm/vm_init.c')
| -rw-r--r-- | sys/vm/vm_init.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/sys/vm/vm_init.c b/sys/vm/vm_init.c index cec1997..1fbcb07 100644 --- a/sys/vm/vm_init.c +++ b/sys/vm/vm_init.c @@ -74,8 +74,12 @@ #include <sys/mutex.h> #include <sys/proc.h> #include <sys/systm.h> +#include <sys/bio.h> +#include <sys/buf.h> #include <vm/vm.h> +#include <vm/vm_param.h> +#include <vm/vm_kern.h> #include <vm/vm_object.h> #include <vm/vm_page.h> #include <vm/vm_map.h> @@ -119,3 +123,88 @@ vm_mem_init(dummy) pmap_init(avail_start, avail_end); vm_pager_init(); } + +void +vm_ksubmap_init(struct kva_md_info *kmi) +{ + vm_offset_t firstaddr; + caddr_t v; + vm_size_t size = 0; + int physmem_est; + vm_offset_t minaddr; + vm_offset_t maxaddr; + + /* + * Allocate space for system data structures. + * The first available kernel virtual address is in "v". + * As pages of kernel virtual memory are allocated, "v" is incremented. + * As pages of memory are allocated and cleared, + * "firstaddr" is incremented. + * An index into the kernel page table corresponding to the + * virtual memory address maintained in "v" is kept in "mapaddr". + */ + + /* + * Make two passes. The first pass calculates how much memory is + * needed and allocates it. The second pass assigns virtual + * addresses to the various data structures. + */ + firstaddr = 0; +again: + v = (caddr_t)firstaddr; + + v = kern_timeout_callwheel_alloc(v); + + /* + * Discount the physical memory larger than the size of kernel_map + * to avoid eating up all of KVA space. + */ + if (kernel_map->first_free == NULL) { + printf("Warning: no free entries in kernel_map.\n"); + physmem_est = physmem; + } else { + physmem_est = min(physmem, btoc(kernel_map->max_offset - + kernel_map->min_offset)); + } + + v = kern_vfs_bio_buffer_alloc(v, physmem_est); + + /* + * End of first pass, size has been calculated so allocate memory + */ + if (firstaddr == 0) { + size = (vm_size_t)((char *)v - firstaddr); + firstaddr = kmem_alloc(kernel_map, round_page(size)); + if (firstaddr == 0) + panic("startup: no room for tables"); + goto again; + } + + /* + * End of second pass, addresses have been assigned + */ + if ((vm_size_t)((char *)v - firstaddr) != size) + panic("startup: table size inconsistency"); + + clean_map = kmem_suballoc(kernel_map, &kmi->clean_sva, &kmi->clean_eva, + (nbuf*BKVASIZE) + (nswbuf*MAXPHYS) + pager_map_size); + buffer_map = kmem_suballoc(clean_map, &kmi->buffer_sva, + &kmi->buffer_eva, (nbuf*BKVASIZE)); + buffer_map->system_map = 1; + pager_map = kmem_suballoc(clean_map, &kmi->pager_sva, &kmi->pager_eva, + (nswbuf*MAXPHYS) + pager_map_size); + pager_map->system_map = 1; + exec_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, + (16*(ARG_MAX+(PAGE_SIZE*3)))); + + /* + * XXX: Mbuf system machine-specific initializations should + * go here, if anywhere. + */ + + /* + * Initialize the callouts we just allocated. + */ + kern_timeout_callwheel_init(); +} + |
