/* $Id: memory.c,v 1.5 1999/08/31 06:55:04 davem Exp $ * memory.c: Prom routine for acquiring various bits of information * about RAM on the machine, both virtual and physical. * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) */ #include #include #include #include /* This routine, for consistency, returns the ram parameters in the * V0 prom memory descriptor format. I choose this format because I * think it was the easiest to work with. I feel the religious * arguments now... ;) Also, I return the linked lists sorted to * prevent paging_init() upset stomach as I have not yet written * the pepto-bismol kernel module yet. */ struct linux_prom64_registers prom_reg_memlist[64]; struct linux_prom64_registers prom_reg_tmp[64]; struct linux_mlist_p1275 prom_phys_total[64]; struct linux_mlist_p1275 prom_prom_taken[64]; struct linux_mlist_p1275 prom_phys_avail[64]; struct linux_mlist_p1275 *prom_ptot_ptr = prom_phys_total; struct linux_mlist_p1275 *prom_ptak_ptr = prom_prom_taken; struct linux_mlist_p1275 *prom_pavl_ptr = prom_phys_avail; struct linux_mem_p1275 prom_memlist; /* Internal Prom library routine to sort a linux_mlist_p1275 memory * list. Used below in initialization. */ static void __init prom_sortmemlist(struct linux_mlist_p1275 *thislist) { int swapi = 0; int i, mitr; unsigned long tmpaddr, tmpsize; unsigned long lowest; for(i=0; thislist[i].theres_more != 0; i++) { lowest = thislist[i].start_adr; for(mitr = i+1; thislist[mitr-1].theres_more != 0; mitr++) if(thislist[mitr].start_adr < lowest) { lowest = thislist[mitr].start_adr; swapi = mitr; } if(lowest == thislist[i].start_adr) continue; tmpaddr = thislist[swapi].start_adr; tmpsize = thislist[swapi].num_bytes; for(mitr = swapi; mitr > i; mitr--) { thislist[mitr].start_adr = thislist[mitr-1].start_adr; thislist[mitr].num_bytes = thislist[mitr-1].num_bytes; } thislist[i].start_adr = tmpaddr; thislist[i].num_bytes = tmpsize; } } /* Initialize the memory lists based upon the prom version. */ void __init prom_meminit(void) { int node = 0; unsigned int iter, num_regs; node = prom_finddevice("/memory"); num_regs = prom_getproperty(node, "available", (char *) prom_reg_memlist, sizeof(prom_reg_memlist)); num_regs = (num_regs/sizeof(struct linux_prom64_registers)); for(iter=0; iter