mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 06:00:43 +00:00
346 lines
8.3 KiB
C
346 lines
8.3 KiB
C
/*
|
|
* Procedures for maintaining information about logical memory blocks.
|
|
*
|
|
* Peter Bergner, IBM Corp. June 2001.
|
|
* Copyright (C) 2001 Peter Bergner.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <lmb.h>
|
|
|
|
#define LMB_ALLOC_ANYWHERE 0
|
|
|
|
void lmb_dump_all(struct lmb *lmb)
|
|
{
|
|
#ifdef DEBUG
|
|
unsigned long i;
|
|
|
|
debug("lmb_dump_all:\n");
|
|
debug(" memory.cnt = 0x%lx\n", lmb->memory.cnt);
|
|
debug(" memory.size = 0x%llx\n",
|
|
(unsigned long long)lmb->memory.size);
|
|
for (i=0; i < lmb->memory.cnt ;i++) {
|
|
debug(" memory.reg[0x%lx].base = 0x%llx\n", i,
|
|
(long long unsigned)lmb->memory.region[i].base);
|
|
debug(" .size = 0x%llx\n",
|
|
(long long unsigned)lmb->memory.region[i].size);
|
|
}
|
|
|
|
debug("\n reserved.cnt = 0x%lx\n",
|
|
lmb->reserved.cnt);
|
|
debug(" reserved.size = 0x%llx\n",
|
|
(long long unsigned)lmb->reserved.size);
|
|
for (i=0; i < lmb->reserved.cnt ;i++) {
|
|
debug(" reserved.reg[0x%lx].base = 0x%llx\n", i,
|
|
(long long unsigned)lmb->reserved.region[i].base);
|
|
debug(" .size = 0x%llx\n",
|
|
(long long unsigned)lmb->reserved.region[i].size);
|
|
}
|
|
#endif /* DEBUG */
|
|
}
|
|
|
|
static long lmb_addrs_overlap(phys_addr_t base1,
|
|
phys_size_t size1, phys_addr_t base2, phys_size_t size2)
|
|
{
|
|
return ((base1 < (base2+size2)) && (base2 < (base1+size1)));
|
|
}
|
|
|
|
static long lmb_addrs_adjacent(phys_addr_t base1, phys_size_t size1,
|
|
phys_addr_t base2, phys_size_t size2)
|
|
{
|
|
if (base2 == base1 + size1)
|
|
return 1;
|
|
else if (base1 == base2 + size2)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static long lmb_regions_adjacent(struct lmb_region *rgn,
|
|
unsigned long r1, unsigned long r2)
|
|
{
|
|
phys_addr_t base1 = rgn->region[r1].base;
|
|
phys_size_t size1 = rgn->region[r1].size;
|
|
phys_addr_t base2 = rgn->region[r2].base;
|
|
phys_size_t size2 = rgn->region[r2].size;
|
|
|
|
return lmb_addrs_adjacent(base1, size1, base2, size2);
|
|
}
|
|
|
|
static void lmb_remove_region(struct lmb_region *rgn, unsigned long r)
|
|
{
|
|
unsigned long i;
|
|
|
|
for (i = r; i < rgn->cnt - 1; i++) {
|
|
rgn->region[i].base = rgn->region[i + 1].base;
|
|
rgn->region[i].size = rgn->region[i + 1].size;
|
|
}
|
|
rgn->cnt--;
|
|
}
|
|
|
|
/* Assumption: base addr of region 1 < base addr of region 2 */
|
|
static void lmb_coalesce_regions(struct lmb_region *rgn,
|
|
unsigned long r1, unsigned long r2)
|
|
{
|
|
rgn->region[r1].size += rgn->region[r2].size;
|
|
lmb_remove_region(rgn, r2);
|
|
}
|
|
|
|
void lmb_init(struct lmb *lmb)
|
|
{
|
|
/* Create a dummy zero size LMB which will get coalesced away later.
|
|
* This simplifies the lmb_add() code below...
|
|
*/
|
|
lmb->memory.region[0].base = 0;
|
|
lmb->memory.region[0].size = 0;
|
|
lmb->memory.cnt = 1;
|
|
lmb->memory.size = 0;
|
|
|
|
/* Ditto. */
|
|
lmb->reserved.region[0].base = 0;
|
|
lmb->reserved.region[0].size = 0;
|
|
lmb->reserved.cnt = 1;
|
|
lmb->reserved.size = 0;
|
|
}
|
|
|
|
/* This routine called with relocation disabled. */
|
|
static long lmb_add_region(struct lmb_region *rgn, phys_addr_t base, phys_size_t size)
|
|
{
|
|
unsigned long coalesced = 0;
|
|
long adjacent, i;
|
|
|
|
if ((rgn->cnt == 1) && (rgn->region[0].size == 0)) {
|
|
rgn->region[0].base = base;
|
|
rgn->region[0].size = size;
|
|
return 0;
|
|
}
|
|
|
|
/* First try and coalesce this LMB with another. */
|
|
for (i=0; i < rgn->cnt; i++) {
|
|
phys_addr_t rgnbase = rgn->region[i].base;
|
|
phys_size_t rgnsize = rgn->region[i].size;
|
|
|
|
if ((rgnbase == base) && (rgnsize == size))
|
|
/* Already have this region, so we're done */
|
|
return 0;
|
|
|
|
adjacent = lmb_addrs_adjacent(base,size,rgnbase,rgnsize);
|
|
if ( adjacent > 0 ) {
|
|
rgn->region[i].base -= size;
|
|
rgn->region[i].size += size;
|
|
coalesced++;
|
|
break;
|
|
}
|
|
else if ( adjacent < 0 ) {
|
|
rgn->region[i].size += size;
|
|
coalesced++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ((i < rgn->cnt-1) && lmb_regions_adjacent(rgn, i, i+1) ) {
|
|
lmb_coalesce_regions(rgn, i, i+1);
|
|
coalesced++;
|
|
}
|
|
|
|
if (coalesced)
|
|
return coalesced;
|
|
if (rgn->cnt >= MAX_LMB_REGIONS)
|
|
return -1;
|
|
|
|
/* Couldn't coalesce the LMB, so add it to the sorted table. */
|
|
for (i = rgn->cnt-1; i >= 0; i--) {
|
|
if (base < rgn->region[i].base) {
|
|
rgn->region[i+1].base = rgn->region[i].base;
|
|
rgn->region[i+1].size = rgn->region[i].size;
|
|
} else {
|
|
rgn->region[i+1].base = base;
|
|
rgn->region[i+1].size = size;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (base < rgn->region[0].base) {
|
|
rgn->region[0].base = base;
|
|
rgn->region[0].size = size;
|
|
}
|
|
|
|
rgn->cnt++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* This routine may be called with relocation disabled. */
|
|
long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size)
|
|
{
|
|
struct lmb_region *_rgn = &(lmb->memory);
|
|
|
|
return lmb_add_region(_rgn, base, size);
|
|
}
|
|
|
|
long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size)
|
|
{
|
|
struct lmb_region *rgn = &(lmb->reserved);
|
|
phys_addr_t rgnbegin, rgnend;
|
|
phys_addr_t end = base + size;
|
|
int i;
|
|
|
|
rgnbegin = rgnend = 0; /* supress gcc warnings */
|
|
|
|
/* Find the region where (base, size) belongs to */
|
|
for (i=0; i < rgn->cnt; i++) {
|
|
rgnbegin = rgn->region[i].base;
|
|
rgnend = rgnbegin + rgn->region[i].size;
|
|
|
|
if ((rgnbegin <= base) && (end <= rgnend))
|
|
break;
|
|
}
|
|
|
|
/* Didn't find the region */
|
|
if (i == rgn->cnt)
|
|
return -1;
|
|
|
|
/* Check to see if we are removing entire region */
|
|
if ((rgnbegin == base) && (rgnend == end)) {
|
|
lmb_remove_region(rgn, i);
|
|
return 0;
|
|
}
|
|
|
|
/* Check to see if region is matching at the front */
|
|
if (rgnbegin == base) {
|
|
rgn->region[i].base = end;
|
|
rgn->region[i].size -= size;
|
|
return 0;
|
|
}
|
|
|
|
/* Check to see if the region is matching at the end */
|
|
if (rgnend == end) {
|
|
rgn->region[i].size -= size;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We need to split the entry - adjust the current one to the
|
|
* beginging of the hole and add the region after hole.
|
|
*/
|
|
rgn->region[i].size = base - rgn->region[i].base;
|
|
return lmb_add_region(rgn, end, rgnend - end);
|
|
}
|
|
|
|
long lmb_reserve(struct lmb *lmb, phys_addr_t base, phys_size_t size)
|
|
{
|
|
struct lmb_region *_rgn = &(lmb->reserved);
|
|
|
|
return lmb_add_region(_rgn, base, size);
|
|
}
|
|
|
|
static long lmb_overlaps_region(struct lmb_region *rgn, phys_addr_t base,
|
|
phys_size_t size)
|
|
{
|
|
unsigned long i;
|
|
|
|
for (i=0; i < rgn->cnt; i++) {
|
|
phys_addr_t rgnbase = rgn->region[i].base;
|
|
phys_size_t rgnsize = rgn->region[i].size;
|
|
if ( lmb_addrs_overlap(base,size,rgnbase,rgnsize) ) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (i < rgn->cnt) ? i : -1;
|
|
}
|
|
|
|
phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align)
|
|
{
|
|
return lmb_alloc_base(lmb, size, align, LMB_ALLOC_ANYWHERE);
|
|
}
|
|
|
|
phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align, phys_addr_t max_addr)
|
|
{
|
|
phys_addr_t alloc;
|
|
|
|
alloc = __lmb_alloc_base(lmb, size, align, max_addr);
|
|
|
|
if (alloc == 0)
|
|
printf("ERROR: Failed to allocate 0x%lx bytes below 0x%lx.\n",
|
|
(ulong)size, (ulong)max_addr);
|
|
|
|
return alloc;
|
|
}
|
|
|
|
static phys_addr_t lmb_align_down(phys_addr_t addr, phys_size_t size)
|
|
{
|
|
return addr & ~(size - 1);
|
|
}
|
|
|
|
static phys_addr_t lmb_align_up(phys_addr_t addr, ulong size)
|
|
{
|
|
return (addr + (size - 1)) & ~(size - 1);
|
|
}
|
|
|
|
phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align, phys_addr_t max_addr)
|
|
{
|
|
long i, j;
|
|
phys_addr_t base = 0;
|
|
phys_addr_t res_base;
|
|
|
|
for (i = lmb->memory.cnt-1; i >= 0; i--) {
|
|
phys_addr_t lmbbase = lmb->memory.region[i].base;
|
|
phys_size_t lmbsize = lmb->memory.region[i].size;
|
|
|
|
if (lmbsize < size)
|
|
continue;
|
|
if (max_addr == LMB_ALLOC_ANYWHERE)
|
|
base = lmb_align_down(lmbbase + lmbsize - size, align);
|
|
else if (lmbbase < max_addr) {
|
|
base = lmbbase + lmbsize;
|
|
if (base < lmbbase)
|
|
base = -1;
|
|
base = min(base, max_addr);
|
|
base = lmb_align_down(base - size, align);
|
|
} else
|
|
continue;
|
|
|
|
while (base && lmbbase <= base) {
|
|
j = lmb_overlaps_region(&lmb->reserved, base, size);
|
|
if (j < 0) {
|
|
/* This area isn't reserved, take it */
|
|
if (lmb_add_region(&lmb->reserved, base,
|
|
lmb_align_up(size,
|
|
align)) < 0)
|
|
return 0;
|
|
return base;
|
|
}
|
|
res_base = lmb->reserved.region[j].base;
|
|
if (res_base < size)
|
|
break;
|
|
base = lmb_align_down(res_base - size, align);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < lmb->reserved.cnt; i++) {
|
|
phys_addr_t upper = lmb->reserved.region[i].base +
|
|
lmb->reserved.region[i].size - 1;
|
|
if ((addr >= lmb->reserved.region[i].base) && (addr <= upper))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
__weak void board_lmb_reserve(struct lmb *lmb)
|
|
{
|
|
/* please define platform specific board_lmb_reserve() */
|
|
}
|
|
|
|
__weak void arch_lmb_reserve(struct lmb *lmb)
|
|
{
|
|
/* please define platform specific arch_lmb_reserve() */
|
|
}
|