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// SPDX-License-Identifier: GPL-2.0-or-later
#include "alloc_helpers_api.h"
/*
* A simple test that tries to allocate a memory region above a specified,
* aligned address:
*
* +
* | +-----------+ |
* | | rgn | |
* +----------+-----------+---------+
* ^
* |
* Aligned min_addr
*
* Expect to allocate a cleared region at the minimal memory address.
*/
static int alloc_from_simple_generic_check(void)
{
struct memblock_region *rgn = &memblock.reserved.regions[0];
void *allocated_ptr = NULL;
char *b;
phys_addr_t size = SZ_16;
phys_addr_t min_addr;
setup_memblock();
min_addr = memblock_end_of_DRAM() - SMP_CACHE_BYTES;
allocated_ptr = memblock_alloc_from(size, SMP_CACHE_BYTES, min_addr);
b = (char *)allocated_ptr;
assert(allocated_ptr);
assert(*b == 0);
assert(rgn->size == size);
assert(rgn->base == min_addr);
assert(memblock.reserved.cnt == 1);
assert(memblock.reserved.total_size == size);
return 0;
}
/*
* A test that tries to allocate a memory region above a certain address.
* The minimal address here is not aligned:
*
* + +
* | + +---------+ |
* | | | rgn | |
* +------+------+---------+------------+
* ^ ^------.
* | |
* min_addr Aligned address
* boundary
*
* Expect to allocate a cleared region at the closest aligned memory address.
*/
static int alloc_from_misaligned_generic_check(void)
{
struct memblock_region *rgn = &memblock.reserved.regions[0];
void *allocated_ptr = NULL;
char *b;
phys_addr_t size = SZ_32;
phys_addr_t min_addr;
setup_memblock();
/* A misaligned address */
min_addr = memblock_end_of_DRAM() - (SMP_CACHE_BYTES * 2 - 1);
allocated_ptr = memblock_alloc_from(size, SMP_CACHE_BYTES, min_addr);
b = (char *)allocated_ptr;
assert(allocated_ptr);
assert(*b == 0);
assert(rgn->size == size);
assert(rgn->base == memblock_end_of_DRAM() - SMP_CACHE_BYTES);
assert(memblock.reserved.cnt == 1);
assert(memblock.reserved.total_size == size);
return 0;
}
/*
* A test that tries to allocate a memory region above an address that is too
* close to the end of the memory:
*
* + +
* | +--------+---+ |
* | | rgn + | |
* +-----------+--------+---+------+
* ^ ^
* | |
* | min_addr
* |
* Aligned address
* boundary
*
* Expect to prioritize granting memory over satisfying the minimal address
* requirement.
*/
static int alloc_from_top_down_high_addr_check(void)
{
struct memblock_region *rgn = &memblock.reserved.regions[0];
void *allocated_ptr = NULL;
phys_addr_t size = SZ_32;
phys_addr_t min_addr;
setup_memblock();
/* The address is too close to the end of the memory */
min_addr = memblock_end_of_DRAM() - SZ_16;
allocated_ptr = memblock_alloc_from(size, SMP_CACHE_BYTES, min_addr);
assert(allocated_ptr);
assert(rgn->size == size);
assert(rgn->base == memblock_end_of_DRAM() - SMP_CACHE_BYTES);
assert(memblock.reserved.cnt == 1);
assert(memblock.reserved.total_size == size);
return 0;
}
/*
* A test that tries to allocate a memory region when there is no space
* available above the minimal address above a certain address:
*
* +
* | +---------+-------------|
* | | rgn | |
* +--------+---------+-------------+
* ^
* |
* min_addr
*
* Expect to prioritize granting memory over satisfying the minimal address
* requirement and to allocate next to the previously reserved region. The
* regions get merged into one.
*/
static int alloc_from_top_down_no_space_above_check(void)
{
struct memblock_region *rgn = &memblock.reserved.regions[0];
void *allocated_ptr = NULL;
phys_addr_t r1_size = SZ_64;
phys_addr_t r2_size = SZ_2;
phys_addr_t total_size = r1_size + r2_size;
phys_addr_t min_addr;
setup_memblock();
min_addr = memblock_end_of_DRAM() - SMP_CACHE_BYTES * 2;
/* No space above this address */
memblock_reserve(min_addr, r2_size);
allocated_ptr = memblock_alloc_from(r1_size, SMP_CACHE_BYTES, min_addr);
assert(allocated_ptr);
assert(rgn->base == min_addr - r1_size);
assert(rgn->size == total_size);
assert(memblock.reserved.cnt == 1);
assert(memblock.reserved.total_size == total_size);
return 0;
}
/*
* A test that tries to allocate a memory region with a minimal address below
* the start address of the available memory. As the allocation is top-down,
* first reserve a region that will force allocation near the start.
* Expect successful allocation and merge of both regions.
*/
static int alloc_from_top_down_min_addr_cap_check(void)
{
struct memblock_region *rgn = &memblock.reserved.regions[0];
void *allocated_ptr = NULL;
phys_addr_t r1_size = SZ_64;
phys_addr_t min_addr;
phys_addr_t start_addr;
setup_memblock();
start_addr = (phys_addr_t)memblock_start_of_DRAM();
min_addr = start_addr - SMP_CACHE_BYTES * 3;
memblock_reserve(start_addr + r1_size, MEM_SIZE - r1_size);
allocated_ptr = memblock_alloc_from(r1_size, SMP_CACHE_BYTES, min_addr);
assert(allocated_ptr);
assert(rgn->base == start_addr);
assert(rgn->size == MEM_SIZE);
assert(memblock.reserved.cnt == 1);
assert(memblock.reserved.total_size == MEM_SIZE);
return 0;
}
/*
* A test that tries to allocate a memory region above an address that is too
* close to the end of the memory:
*
* +
* |-----------+ + |
* | rgn | | |
* +-----------+--------------+-----+
* ^ ^
* | |
* Aligned address min_addr
* boundary
*
* Expect to prioritize granting memory over satisfying the minimal address
* requirement. Allocation happens at beginning of the available memory.
*/
static int alloc_from_bottom_up_high_addr_check(void)
{
struct memblock_region *rgn = &memblock.reserved.regions[0];
void *allocated_ptr = NULL;
phys_addr_t size = SZ_32;
phys_addr_t min_addr;
setup_memblock();
/* The address is too close to the end of the memory */
min_addr = memblock_end_of_DRAM() - SZ_8;
allocated_ptr = memblock_alloc_from(size, SMP_CACHE_BYTES, min_addr);
assert(allocated_ptr);
assert(rgn->size == size);
assert(rgn->base == memblock_start_of_DRAM());
assert(memblock.reserved.cnt == 1);
assert(memblock.reserved.total_size == size);
return 0;
}
/*
* A test that tries to allocate a memory region when there is no space
* available above the minimal address above a certain address:
*
* +
* |-----------+ +-------------------|
* | rgn | | |
* +-----------+----+-------------------+
* ^
* |
* min_addr
*
* Expect to prioritize granting memory over satisfying the minimal address
* requirement and to allocate at the beginning of the available memory.
*/
static int alloc_from_bottom_up_no_space_above_check(void)
{
struct memblock_region *rgn = &memblock.reserved.regions[0];
void *allocated_ptr = NULL;
phys_addr_t r1_size = SZ_64;
phys_addr_t min_addr;
phys_addr_t r2_size;
setup_memblock();
min_addr = memblock_start_of_DRAM() + SZ_128;
r2_size = memblock_end_of_DRAM() - min_addr;
/* No space above this address */
memblock_reserve(min_addr - SMP_CACHE_BYTES, r2_size);
allocated_ptr = memblock_alloc_from(r1_size, SMP_CACHE_BYTES, min_addr);
assert(allocated_ptr);
assert(rgn->base == memblock_start_of_DRAM());
assert(rgn->size == r1_size);
assert(memblock.reserved.cnt == 2);
assert(memblock.reserved.total_size == r1_size + r2_size);
return 0;
}
/*
* A test that tries to allocate a memory region with a minimal address below
* the start address of the available memory. Expect to allocate a region
* at the beginning of the available memory.
*/
static int alloc_from_bottom_up_min_addr_cap_check(void)
{
struct memblock_region *rgn = &memblock.reserved.regions[0];
void *allocated_ptr = NULL;
phys_addr_t r1_size = SZ_64;
phys_addr_t min_addr;
phys_addr_t start_addr;
setup_memblock();
start_addr = (phys_addr_t)memblock_start_of_DRAM();
min_addr = start_addr - SMP_CACHE_BYTES * 3;
allocated_ptr = memblock_alloc_from(r1_size, SMP_CACHE_BYTES, min_addr);
assert(allocated_ptr);
assert(rgn->base == start_addr);
assert(rgn->size == r1_size);
assert(memblock.reserved.cnt == 1);
assert(memblock.reserved.total_size == r1_size);
return 0;
}
/* Test case wrappers */
static int alloc_from_simple_check(void)
{
memblock_set_bottom_up(false);
alloc_from_simple_generic_check();
memblock_set_bottom_up(true);
alloc_from_simple_generic_check();
return 0;
}
static int alloc_from_misaligned_check(void)
{
memblock_set_bottom_up(false);
alloc_from_misaligned_generic_check();
memblock_set_bottom_up(true);
alloc_from_misaligned_generic_check();
return 0;
}
static int alloc_from_high_addr_check(void)
{
memblock_set_bottom_up(false);
alloc_from_top_down_high_addr_check();
memblock_set_bottom_up(true);
alloc_from_bottom_up_high_addr_check();
return 0;
}
static int alloc_from_no_space_above_check(void)
{
memblock_set_bottom_up(false);
alloc_from_top_down_no_space_above_check();
memblock_set_bottom_up(true);
alloc_from_bottom_up_no_space_above_check();
return 0;
}
static int alloc_from_min_addr_cap_check(void)
{
memblock_set_bottom_up(false);
alloc_from_top_down_min_addr_cap_check();
memblock_set_bottom_up(true);
alloc_from_bottom_up_min_addr_cap_check();
return 0;
}
int memblock_alloc_helpers_checks(void)
{
reset_memblock_attributes();
dummy_physical_memory_init();
alloc_from_simple_check();
alloc_from_misaligned_check();
alloc_from_high_addr_check();
alloc_from_no_space_above_check();
alloc_from_min_addr_cap_check();
dummy_physical_memory_cleanup();
return 0;
}
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