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Bahadir Balban
2008-01-13 13:53:52 +00:00
commit e2b791a3d8
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tasks/mm0/src/init.c Normal file
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/*
* Initialise the system.
*
* Copyright (C) 2007 Bahadir Balban
*/
#include <stdio.h>
#include <kdata.h>
#include <memory.h>
#include <mm/alloc_page.h>
#include <kmalloc/kmalloc.h>
#include <l4lib/arch/syscalls.h>
#include <task.h>
#include <shm.h>
void init_utcb(void)
{
struct task_ids ids;
void *utcb_page = alloc_page(1); /* Allocate a utcb page */
l4_getid(&ids);
l4_map(utcb_page, __L4_ARM_Utcb(), 1, MAP_USR_RW_FLAGS, ids.tid);
}
void init_mm(struct initdata *initdata)
{
/* Initialise the page and bank descriptors */
init_physmem(initdata, membank);
printf("%s: Initialised physmem.\n", __TASKNAME__);
/* Initialise the page allocator on first bank. */
init_page_allocator(membank[0].free, membank[0].end);
printf("%s: Initialised page allocator.\n", __TASKNAME__);
/* Initialise the zero page */
init_zero_page();
printf("%s: Initialised zero page.\n", __TASKNAME__);
init_utcb();
printf("%s: Initialised own utcb.\n", __TASKNAME__);
/* Initialise the pager's memory allocator */
kmalloc_init();
printf("%s: Initialised kmalloc.\n", __TASKNAME__);
shm_init();
printf("%s: Initialised shm structures.\n", __TASKNAME__);
/* Give the kernel some memory to use for its allocators */
l4_kmem_grant(__pfn(alloc_page(__pfn(SZ_1MB))), __pfn(SZ_1MB));
}
/* Create temporary run-time files in memory to test with mmap */
void init_boot_files(struct initdata *initdata)
{
struct bootdesc *bd = initdata->bootdesc;
int total_files = bd->total_images;
struct vm_file *memfile;
struct svc_image *img;
memfile = kzalloc(sizeof(struct vm_file) * total_files);
initdata->memfile = memfile;
BUG();
for (int i = BOOTDESC_IMAGE_START; i < total_files; i++) {
img = &bd->images[i];
/*
* I have left the i_addr as physical on purpose. The inode is
* not a readily usable memory address, its simply a unique key
* that represents that file. Here, we use the physical address
* of the memory file as that key. The pager must take action in
* order to make use of it.
*/
memfile[i].inode.i_addr = img->phys_start;
memfile[i].length = img->phys_end - img->phys_start;
memfile[i].pager = &default_file_pager;
INIT_LIST_HEAD(&memfile[i].page_cache_list);
}
}
void initialise(void)
{
request_initdata(&initdata);
init_mm(&initdata);
init_boot_files(&initdata);
// printf("INITTASK: Initialised mock-up bootfiles.\n");
init_pm(&initdata);
// printf("INITTASK: Initialised the memory/process manager.\n");
}