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This commit is contained in:
Bahadir Balban
2008-01-13 13:53:52 +00:00
commit e2b791a3d8
789 changed files with 95825 additions and 0 deletions
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105
tasks/mm0/src/kdata.c Normal file
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/*
* Requesting system information from kernel during init.
*
* Copyright (C) 2007 Bahadir Balban
*/
#include <stdio.h>
#include <l4lib/arch/syscalls.h>
#include <kdata.h>
#include <string.h>
#include INC_API(kip.h)
#include <kmalloc/kmalloc.h>
/* Kernel data acquired during initialisation */
struct initdata initdata;
#define BOOTDESC_PREALLOC_SIZE 128
static char bootdesc_memory[BOOTDESC_PREALLOC_SIZE]; /* 128 bytes */
void print_bootdesc(struct bootdesc *bd)
{
for (int i = 0; i < bd->total_images; i++) {
printf("Task Image: %d\n", i);
printf("Name: %s\n", bd->images[i].name);
printf("Start: 0x%x\n", bd->images[i].phys_start);
printf("End: 0x%x\n", bd->images[i].phys_end);
}
}
void print_pfn_range(int pfn, int size)
{
unsigned int addr = pfn << PAGE_BITS;
unsigned int end = (pfn + size) << PAGE_BITS;
printf("Used: 0x%x - 0x%x\n", addr, end);
}
void print_page_map(struct page_bitmap *map)
{
unsigned int start_pfn = 0;
unsigned int total_used = 0;
int numpages = 0;
printf("Pages start at address 0x%x\n", map->pfn_start << PAGE_BITS);
printf("Pages end at address 0x%x\n", map->pfn_end << PAGE_BITS);
printf("The used page areas are:\n");
for (int i = 0; i < (PHYSMEM_TOTAL_PAGES >> 5); i++) {
for (int x = 0; x < WORD_BITS; x++) {
if (map->map[i] & (1 << x)) { /* A used page found? */
if (!start_pfn) /* First such page found? */
start_pfn = (WORD_BITS * i) + x;
total_used++;
numpages++; /* Increase number of pages */
} else { /* Either used pages ended or were never found */
if (start_pfn) { /* We had a used page */
/* Finished end of used range.
* Print and reset. */
print_pfn_range(start_pfn, numpages);
start_pfn = 0;
numpages = 0;
}
}
}
}
printf("Total of %d pages. %d Kbytes.\n", total_used, total_used << 2);
}
int request_initdata(struct initdata *initdata)
{
int err;
int bootdesc_size;
/* Read all used physical page information in a bitmap. */
if ((err = l4_kread(KDATA_PAGE_MAP, &initdata->page_map)) < 0) {
printf("L4_kdata_read() call failed. Could not complete"
"KDATA_PAGE_MAP request.\n");
goto error;
}
print_page_map(&initdata->page_map);
/* Read the boot descriptor size */
if ((err = l4_kread(KDATA_BOOTDESC_SIZE, &bootdesc_size)) < 0) {
printf("L4_kdata_read() call failed. Could not complete"
"KDATA_BOOTDESC_SIZE request.\n");
goto error;
}
if (bootdesc_size > BOOTDESC_PREALLOC_SIZE) {
printf("Insufficient preallocated memory for bootdesc. "
"Size too big.\n");
goto error;
}
/* Get preallocated bootdesc memory */
initdata->bootdesc = (struct bootdesc *)&bootdesc_memory;
/* Read the boot descriptor */
if ((err = l4_kread(KDATA_BOOTDESC, initdata->bootdesc)) < 0) {
printf("L4_kdata_read() call failed. Could not complete"
"KDATA_BOOTDESC request.\n");
goto error;
}
return 0;
error:
printf("FATAL: Inittask failed during initialisation. exiting.\n");
return err;
}