161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
/*
|
|
* memory.c: PROM library functions for acquiring/using memory descriptors
|
|
* given to us from the ARCS firmware.
|
|
*
|
|
* Copyright (C) 1996 by David S. Miller
|
|
* Copyright (C) 1999, 2000, 2001 by Ralf Baechle
|
|
* Copyright (C) 1999, 2000 by Silicon Graphics, Inc.
|
|
*
|
|
* PROM library functions for acquiring/using memory descriptors given to us
|
|
* from the ARCS firmware. This is only used when CONFIG_ARC_MEMORY is set
|
|
* because on some machines like SGI IP27 the ARC memory configuration data
|
|
* completly bogus and alternate easier to use mechanisms are available.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/swap.h>
|
|
|
|
#include <asm/sgialib.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/bootinfo.h>
|
|
|
|
#undef DEBUG
|
|
|
|
/*
|
|
* For ARC firmware memory functions the unit of meassuring memory is always
|
|
* a 4k page of memory
|
|
*/
|
|
#define ARC_PAGE_SHIFT 12
|
|
|
|
struct linux_mdesc * __init ArcGetMemoryDescriptor(struct linux_mdesc *Current)
|
|
{
|
|
return (struct linux_mdesc *) ARC_CALL1(get_mdesc, Current);
|
|
}
|
|
|
|
#ifdef DEBUG /* convenient for debugging */
|
|
static char *arcs_mtypes[8] = {
|
|
"Exception Block",
|
|
"ARCS Romvec Page",
|
|
"Free/Contig RAM",
|
|
"Generic Free RAM",
|
|
"Bad Memory",
|
|
"Standalone Program Pages",
|
|
"ARCS Temp Storage Area",
|
|
"ARCS Permanent Storage Area"
|
|
};
|
|
|
|
static char *arc_mtypes[8] = {
|
|
"Exception Block",
|
|
"SystemParameterBlock",
|
|
"FreeMemory",
|
|
"Bad Memory",
|
|
"LoadedProgram",
|
|
"FirmwareTemporary",
|
|
"FirmwarePermanent",
|
|
"FreeContiguous"
|
|
};
|
|
#define mtypes(a) (prom_flags & PROM_FLAG_ARCS) ? arcs_mtypes[a.arcs] \
|
|
: arc_mtypes[a.arc]
|
|
#endif
|
|
|
|
static inline int memtype_classify_arcs(union linux_memtypes type)
|
|
{
|
|
switch (type.arcs) {
|
|
case arcs_fcontig:
|
|
case arcs_free:
|
|
return BOOT_MEM_RAM;
|
|
case arcs_atmp:
|
|
return BOOT_MEM_ROM_DATA;
|
|
case arcs_eblock:
|
|
case arcs_rvpage:
|
|
case arcs_bmem:
|
|
case arcs_prog:
|
|
case arcs_aperm:
|
|
return BOOT_MEM_RESERVED;
|
|
default:
|
|
BUG();
|
|
}
|
|
while(1); /* Nuke warning. */
|
|
}
|
|
|
|
static inline int memtype_classify_arc(union linux_memtypes type)
|
|
{
|
|
switch (type.arc) {
|
|
case arc_free:
|
|
case arc_fcontig:
|
|
return BOOT_MEM_RAM;
|
|
case arc_atmp:
|
|
return BOOT_MEM_ROM_DATA;
|
|
case arc_eblock:
|
|
case arc_rvpage:
|
|
case arc_bmem:
|
|
case arc_prog:
|
|
case arc_aperm:
|
|
return BOOT_MEM_RESERVED;
|
|
default:
|
|
BUG();
|
|
}
|
|
while(1); /* Nuke warning. */
|
|
}
|
|
|
|
static int __init prom_memtype_classify(union linux_memtypes type)
|
|
{
|
|
if (prom_flags & PROM_FLAG_ARCS) /* SGI is ``different'' ... */
|
|
return memtype_classify_arcs(type);
|
|
|
|
return memtype_classify_arc(type);
|
|
}
|
|
|
|
void __init prom_meminit(void)
|
|
{
|
|
struct linux_mdesc *p;
|
|
|
|
#ifdef DEBUG
|
|
int i = 0;
|
|
|
|
printk("ARCS MEMORY DESCRIPTOR dump:\n");
|
|
p = ArcGetMemoryDescriptor(PROM_NULL_MDESC);
|
|
while(p) {
|
|
printk("[%d,%p]: base<%08lx> pages<%08lx> type<%s>\n",
|
|
i, p, p->base, p->pages, mtypes(p->type));
|
|
p = ArcGetMemoryDescriptor(p);
|
|
i++;
|
|
}
|
|
#endif
|
|
|
|
p = PROM_NULL_MDESC;
|
|
while ((p = ArcGetMemoryDescriptor(p))) {
|
|
unsigned long base, size;
|
|
long type;
|
|
|
|
base = p->base << ARC_PAGE_SHIFT;
|
|
size = p->pages << ARC_PAGE_SHIFT;
|
|
type = prom_memtype_classify(p->type);
|
|
|
|
add_memory_region(base, size, type);
|
|
}
|
|
}
|
|
|
|
void __init prom_free_prom_memory(void)
|
|
{
|
|
unsigned long addr;
|
|
int i;
|
|
|
|
if (prom_flags & PROM_FLAG_DONT_FREE_TEMP)
|
|
return;
|
|
|
|
for (i = 0; i < boot_mem_map.nr_map; i++) {
|
|
if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
|
|
continue;
|
|
|
|
addr = boot_mem_map.map[i].addr;
|
|
free_init_pages("prom memory",
|
|
addr, addr + boot_mem_map.map[i].size);
|
|
}
|
|
}
|