mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 09:48:16 +00:00
9cc2323fee
This fixes the automatic lmb initialization and reservation for boards with more than one DRAM bank. This fixes the CVE-2018-18439 and -18440 fixes that only allowed to load files into the firs DRAM bank from fs and via tftp. Found-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
428 lines
10 KiB
C
428 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Procedures for maintaining information about logical memory blocks.
|
|
*
|
|
* Peter Bergner, IBM Corp. June 2001.
|
|
* Copyright (C) 2001 Peter Bergner.
|
|
*/
|
|
|
|
#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,
|
|
(unsigned long long)lmb->memory.region[i].base);
|
|
debug(" .size = 0x%llx\n",
|
|
(unsigned long long)lmb->memory.region[i].size);
|
|
}
|
|
|
|
debug("\n reserved.cnt = 0x%lx\n",
|
|
lmb->reserved.cnt);
|
|
debug(" reserved.size = 0x%llx\n",
|
|
(unsigned long long)lmb->reserved.size);
|
|
for (i = 0; i < lmb->reserved.cnt; i++) {
|
|
debug(" reserved.reg[0x%lx].base = 0x%llx\n", i,
|
|
(unsigned long long)lmb->reserved.region[i].base);
|
|
debug(" .size = 0x%llx\n",
|
|
(unsigned long long)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)
|
|
{
|
|
const phys_addr_t base1_end = base1 + size1 - 1;
|
|
const phys_addr_t base2_end = base2 + size2 - 1;
|
|
|
|
return ((base1 <= base2_end) && (base2 <= base1_end));
|
|
}
|
|
|
|
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)
|
|
{
|
|
lmb->memory.cnt = 0;
|
|
lmb->memory.size = 0;
|
|
lmb->reserved.cnt = 0;
|
|
lmb->reserved.size = 0;
|
|
}
|
|
|
|
static void lmb_reserve_common(struct lmb *lmb, void *fdt_blob)
|
|
{
|
|
arch_lmb_reserve(lmb);
|
|
board_lmb_reserve(lmb);
|
|
|
|
if (IMAGE_ENABLE_OF_LIBFDT && fdt_blob)
|
|
boot_fdt_add_mem_rsv_regions(lmb, fdt_blob);
|
|
}
|
|
|
|
/* Initialize the struct, add memory and call arch/board reserve functions */
|
|
void lmb_init_and_reserve(struct lmb *lmb, bd_t *bd, void *fdt_blob)
|
|
{
|
|
#ifdef CONFIG_NR_DRAM_BANKS
|
|
int i;
|
|
#endif
|
|
|
|
lmb_init(lmb);
|
|
#ifdef CONFIG_NR_DRAM_BANKS
|
|
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
|
|
if (bd->bi_dram[i].size) {
|
|
lmb_add(lmb, bd->bi_dram[i].start,
|
|
bd->bi_dram[i].size);
|
|
}
|
|
}
|
|
#else
|
|
if (bd->bi_memsize)
|
|
lmb_add(lmb, bd->bi_memstart, bd->bi_memsize);
|
|
#endif
|
|
lmb_reserve_common(lmb, fdt_blob);
|
|
}
|
|
|
|
/* Initialize the struct, add memory and call arch/board reserve functions */
|
|
void lmb_init_and_reserve_range(struct lmb *lmb, phys_addr_t base,
|
|
phys_size_t size, void *fdt_blob)
|
|
{
|
|
lmb_init(lmb);
|
|
lmb_add(lmb, base, size);
|
|
lmb_reserve_common(lmb, fdt_blob);
|
|
}
|
|
|
|
/* 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 == 0) {
|
|
rgn->region[0].base = base;
|
|
rgn->region[0].size = size;
|
|
rgn->cnt = 1;
|
|
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;
|
|
} else if (lmb_addrs_overlap(base, size, rgnbase, rgnsize)) {
|
|
/* regions overlap */
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
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 - 1;
|
|
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 - 1;
|
|
|
|
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 + 1;
|
|
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 + 1, 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);
|
|
}
|
|
|
|
phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align, phys_addr_t max_addr)
|
|
{
|
|
long i, rgn;
|
|
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) {
|
|
rgn = lmb_overlaps_region(&lmb->reserved, base, size);
|
|
if (rgn < 0) {
|
|
/* This area isn't reserved, take it */
|
|
if (lmb_add_region(&lmb->reserved, base,
|
|
size) < 0)
|
|
return 0;
|
|
return base;
|
|
}
|
|
res_base = lmb->reserved.region[rgn].base;
|
|
if (res_base < size)
|
|
break;
|
|
base = lmb_align_down(res_base - size, align);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Try to allocate a specific address range: must be in defined memory but not
|
|
* reserved
|
|
*/
|
|
phys_addr_t lmb_alloc_addr(struct lmb *lmb, phys_addr_t base, phys_size_t size)
|
|
{
|
|
long rgn;
|
|
|
|
/* Check if the requested address is in one of the memory regions */
|
|
rgn = lmb_overlaps_region(&lmb->memory, base, size);
|
|
if (rgn >= 0) {
|
|
/*
|
|
* Check if the requested end address is in the same memory
|
|
* region we found.
|
|
*/
|
|
if (lmb_addrs_overlap(lmb->memory.region[rgn].base,
|
|
lmb->memory.region[rgn].size,
|
|
base + size - 1, 1)) {
|
|
/* ok, reserve the memory */
|
|
if (lmb_reserve(lmb, base, size) >= 0)
|
|
return base;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Return number of bytes from a given address that are free */
|
|
phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr)
|
|
{
|
|
int i;
|
|
long rgn;
|
|
|
|
/* check if the requested address is in the memory regions */
|
|
rgn = lmb_overlaps_region(&lmb->memory, addr, 1);
|
|
if (rgn >= 0) {
|
|
for (i = 0; i < lmb->reserved.cnt; i++) {
|
|
if (addr < lmb->reserved.region[i].base) {
|
|
/* first reserved range > requested address */
|
|
return lmb->reserved.region[i].base - addr;
|
|
}
|
|
if (lmb->reserved.region[i].base +
|
|
lmb->reserved.region[i].size > addr) {
|
|
/* requested addr is in this reserved range */
|
|
return 0;
|
|
}
|
|
}
|
|
/* if we come here: no reserved ranges above requested addr */
|
|
return lmb->memory.region[lmb->memory.cnt - 1].base +
|
|
lmb->memory.region[lmb->memory.cnt - 1].size - addr;
|
|
}
|
|
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() */
|
|
}
|