static errval_t copy_bios_mem(void) {
errval_t err = SYS_ERR_OK;
// Get a copy of the VBE BIOS before ACPI touches it
struct capref bioscap;
err = mm_alloc_range(&pci_mm_physaddr, BIOS_BITS, 0,
1UL << BIOS_BITS, &bioscap, NULL);
assert(err_is_ok(err));
void *origbios;
struct vregion *origbios_vregion;
err = vspace_map_one_frame(&origbios, 1 << BIOS_BITS, bioscap,
NULL, &origbios_vregion);
assert(err_is_ok(err));
err = frame_alloc(&biosmem, 1 << BIOS_BITS, NULL);
assert(err_is_ok(err));
void *newbios;
struct vregion *newbios_vregion;
err = vspace_map_one_frame(&newbios, 1 << BIOS_BITS, biosmem,
NULL, &newbios_vregion);
assert(err_is_ok(err));
memcpy(newbios, origbios, 1 << BIOS_BITS);
// Unmap both vspace regions again
vregion_destroy(origbios_vregion);
vregion_destroy(newbios_vregion);
// TODO: Implement mm_free()
return err;
}
errval_t memserv_alloc(struct capref *ret, uint8_t bits, genpaddr_t minbase,
genpaddr_t maxlimit)
{
errval_t err;
assert(bits >= MINSIZEBITS);
/* refill slot allocator if needed */
err = slot_prealloc_refill(mm_ram.slot_alloc_inst);
assert(err_is_ok(err));
/* refill slab allocator if needed */
size_t freecount = slab_freecount(&mm_ram.slabs);
while (!refilling && (freecount <= MINSPARENODES)) {
refilling = true;
struct capref frame;
err = msa.a.alloc(&msa.a, &frame);
assert(err_is_ok(err));
size_t retsize;
err = frame_create(frame, BASE_PAGE_SIZE * 8, &retsize);
assert(err_is_ok(err));
assert(retsize % BASE_PAGE_SIZE == 0);
assert(retsize >= BASE_PAGE_SIZE);
void *buf;
err = paging_map_frame(get_current_paging_state(), &buf, retsize, frame, NULL, NULL);
if (err_is_fail(err)) {
DEBUG_ERR(err, "paging_map_frame failed");
assert(buf);
}
slab_grow(&mm_ram.slabs, buf, retsize);
freecount = slab_freecount(&mm_ram.slabs);
}
if (freecount > MINSPARENODES) {
refilling = false;
}
if(maxlimit == 0) {
err = mm_alloc(&mm_ram, bits, ret, NULL);
} else {
err = mm_alloc_range(&mm_ram, bits, minbase, maxlimit, ret, NULL);
}
if (err_is_fail(err)) {
debug_printf("in mem_serv:mymm_alloc(bits=%"PRIu8", minbase=%"PRIxGENPADDR
", maxlimit=%"PRIxGENPADDR")\n", bits, minbase, maxlimit);
DEBUG_ERR(err, "mem_serv:mymm_alloc");
}
return err;
}
static errval_t mymm_alloc(struct capref *ret, uint8_t bits, genpaddr_t minbase,
genpaddr_t maxlimit)
{
errval_t err;
assert(bits >= MINSIZEBITS);
if(maxlimit == 0) {
err = mm_alloc(&mm_ram, bits, ret, NULL);
} else {
err = mm_alloc_range(&mm_ram, bits, minbase, maxlimit, ret, NULL);
}
return err;
}
int cdi_alloc_phys_mem(size_t size, void** vaddr, void** paddr)
{ LOG
cdi_check_init(-1);
cdi_check_arg(vaddr, != NULL, -1);
cdi_check_arg(paddr, != NULL, -1);
size_t pages = NUM_PAGES(size);
if (!pages)
return -1;
paddr_t phys = mm_alloc_range(pages);
if (paddr == NO_PAGE)
return -1;
vaddr_t virt = km_alloc_addr(phys, PE_PRESENT | PE_READWRITE, size);
if (!virt)
return -1;
*vaddr = virt;
*paddr = phys;
return 0;
}
