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https://github.com/brain-hackers/u-boot-brain
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test: add test for lib/lmb.c
Add basic tests for the lmb memory allocation code used to reserve and allocate memory during boot. Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Goldschmidt
Tom Rini
parent
9a9d66f5ef
commit
a01ae0c23f
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@ -3,3 +3,4 @@
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# (C) Copyright 2018
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# Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
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obj-y += hexdump.o
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obj-y += lmb.o
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297
test/lib/lmb.c
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297
test/lib/lmb.c
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2018 Simon Goldschmidt
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*/
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#include <common.h>
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#include <lmb.h>
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#include <dm/test.h>
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#include <test/ut.h>
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static int check_lmb(struct unit_test_state *uts, struct lmb *lmb,
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phys_addr_t ram_base, phys_size_t ram_size,
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unsigned long num_reserved,
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phys_addr_t base1, phys_size_t size1,
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phys_addr_t base2, phys_size_t size2,
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phys_addr_t base3, phys_size_t size3)
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{
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ut_asserteq(lmb->memory.cnt, 1);
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ut_asserteq(lmb->memory.region[0].base, ram_base);
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ut_asserteq(lmb->memory.region[0].size, ram_size);
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ut_asserteq(lmb->reserved.cnt, num_reserved);
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if (num_reserved > 0) {
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ut_asserteq(lmb->reserved.region[0].base, base1);
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ut_asserteq(lmb->reserved.region[0].size, size1);
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}
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if (num_reserved > 1) {
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ut_asserteq(lmb->reserved.region[1].base, base2);
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ut_asserteq(lmb->reserved.region[1].size, size2);
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}
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if (num_reserved > 2) {
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ut_asserteq(lmb->reserved.region[2].base, base3);
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ut_asserteq(lmb->reserved.region[2].size, size3);
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}
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return 0;
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}
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#define ASSERT_LMB(lmb, ram_base, ram_size, num_reserved, base1, size1, \
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base2, size2, base3, size3) \
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ut_assert(!check_lmb(uts, lmb, ram_base, ram_size, \
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num_reserved, base1, size1, base2, size2, base3, \
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size3))
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/*
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* Test helper function that reserves 64 KiB somewhere in the simulated RAM and
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* then does some alloc + free tests.
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*/
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static int test_multi_alloc(struct unit_test_state *uts,
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const phys_addr_t ram, const phys_size_t ram_size,
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const phys_addr_t alloc_64k_addr)
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{
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const phys_addr_t ram_end = ram + ram_size;
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const phys_addr_t alloc_64k_end = alloc_64k_addr + 0x10000;
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struct lmb lmb;
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long ret;
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phys_addr_t a, a2, b, b2, c, d;
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/* check for overflow */
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ut_assert(ram_end == 0 || ram_end > ram);
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ut_assert(alloc_64k_end > alloc_64k_addr);
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/* check input addresses + size */
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ut_assert(alloc_64k_addr >= ram + 8);
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ut_assert(alloc_64k_end <= ram_end - 8);
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lmb_init(&lmb);
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ret = lmb_add(&lmb, ram, ram_size);
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ut_asserteq(ret, 0);
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/* reserve 64KiB somewhere */
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ret = lmb_reserve(&lmb, alloc_64k_addr, 0x10000);
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ut_asserteq(ret, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 1, alloc_64k_addr, 0x10000,
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0, 0, 0, 0);
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/* allocate somewhere, should be at the end of RAM */
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a = lmb_alloc(&lmb, 4, 1);
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ut_asserteq(a, ram_end - 4);
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ASSERT_LMB(&lmb, ram, ram_size, 2, alloc_64k_addr, 0x10000,
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ram_end - 4, 4, 0, 0);
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/* alloc below end of reserved region -> below reserved region */
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b = lmb_alloc_base(&lmb, 4, 1, alloc_64k_end);
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ut_asserteq(b, alloc_64k_addr - 4);
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ASSERT_LMB(&lmb, ram, ram_size, 2,
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alloc_64k_addr - 4, 0x10000 + 4, ram_end - 4, 4, 0, 0);
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/* 2nd time */
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c = lmb_alloc(&lmb, 4, 1);
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ut_asserteq(c, ram_end - 8);
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ASSERT_LMB(&lmb, ram, ram_size, 2,
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alloc_64k_addr - 4, 0x10000 + 4, ram_end - 8, 8, 0, 0);
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d = lmb_alloc_base(&lmb, 4, 1, alloc_64k_end);
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ut_asserteq(d, alloc_64k_addr - 8);
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ASSERT_LMB(&lmb, ram, ram_size, 2,
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alloc_64k_addr - 8, 0x10000 + 8, ram_end - 8, 8, 0, 0);
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ret = lmb_free(&lmb, a, 4);
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ut_asserteq(ret, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 2,
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alloc_64k_addr - 8, 0x10000 + 8, ram_end - 8, 4, 0, 0);
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/* allocate again to ensure we get the same address */
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a2 = lmb_alloc(&lmb, 4, 1);
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ut_asserteq(a, a2);
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ASSERT_LMB(&lmb, ram, ram_size, 2,
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alloc_64k_addr - 8, 0x10000 + 8, ram_end - 8, 8, 0, 0);
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ret = lmb_free(&lmb, a2, 4);
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ut_asserteq(ret, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 2,
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alloc_64k_addr - 8, 0x10000 + 8, ram_end - 8, 4, 0, 0);
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ret = lmb_free(&lmb, b, 4);
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ut_asserteq(ret, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 3,
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alloc_64k_addr - 8, 4, alloc_64k_addr, 0x10000,
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ram_end - 8, 4);
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/* allocate again to ensure we get the same address */
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b2 = lmb_alloc_base(&lmb, 4, 1, alloc_64k_end);
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ut_asserteq(b, b2);
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ASSERT_LMB(&lmb, ram, ram_size, 2,
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alloc_64k_addr - 8, 0x10000 + 8, ram_end - 8, 4, 0, 0);
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ret = lmb_free(&lmb, b2, 4);
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ut_asserteq(ret, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 3,
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alloc_64k_addr - 8, 4, alloc_64k_addr, 0x10000,
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ram_end - 8, 4);
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ret = lmb_free(&lmb, c, 4);
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ut_asserteq(ret, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 2,
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alloc_64k_addr - 8, 4, alloc_64k_addr, 0x10000, 0, 0);
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ret = lmb_free(&lmb, d, 4);
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ut_asserteq(ret, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 1, alloc_64k_addr, 0x10000,
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0, 0, 0, 0);
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return 0;
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}
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static int test_multi_alloc_512mb(struct unit_test_state *uts,
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const phys_addr_t ram)
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{
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return test_multi_alloc(uts, ram, 0x20000000, ram + 0x10000000);
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}
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/* Create a memory region with one reserved region and allocate */
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static int lib_test_lmb_simple(struct unit_test_state *uts)
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{
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/* simulate 512 MiB RAM beginning at 1GiB */
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return test_multi_alloc_512mb(uts, 0x40000000);
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}
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DM_TEST(lib_test_lmb_simple, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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/* Simulate 512 MiB RAM, allocate some blocks that fit/don't fit */
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static int test_bigblock(struct unit_test_state *uts, const phys_addr_t ram)
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{
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const phys_size_t ram_size = 0x20000000;
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const phys_size_t big_block_size = 0x10000000;
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const phys_addr_t ram_end = ram + ram_size;
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const phys_addr_t alloc_64k_addr = ram + 0x10000000;
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struct lmb lmb;
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long ret;
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phys_addr_t a, b;
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/* check for overflow */
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ut_assert(ram_end == 0 || ram_end > ram);
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lmb_init(&lmb);
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ret = lmb_add(&lmb, ram, ram_size);
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ut_asserteq(ret, 0);
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/* reserve 64KiB in the middle of RAM */
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ret = lmb_reserve(&lmb, alloc_64k_addr, 0x10000);
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ut_asserteq(ret, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 1, alloc_64k_addr, 0x10000,
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0, 0, 0, 0);
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/* allocate a big block, should be below reserved */
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a = lmb_alloc(&lmb, big_block_size, 1);
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ut_asserteq(a, ram);
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ASSERT_LMB(&lmb, ram, ram_size, 1, a,
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big_block_size + 0x10000, 0, 0, 0, 0);
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/* allocate 2nd big block */
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/* This should fail, printing an error */
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b = lmb_alloc(&lmb, big_block_size, 1);
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ut_asserteq(b, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 1, a,
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big_block_size + 0x10000, 0, 0, 0, 0);
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ret = lmb_free(&lmb, a, big_block_size);
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ut_asserteq(ret, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 1, alloc_64k_addr, 0x10000,
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0, 0, 0, 0);
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/* allocate too big block */
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/* This should fail, printing an error */
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a = lmb_alloc(&lmb, ram_size, 1);
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ut_asserteq(a, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 1, alloc_64k_addr, 0x10000,
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0, 0, 0, 0);
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return 0;
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}
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static int lib_test_lmb_big(struct unit_test_state *uts)
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{
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return test_bigblock(uts, 0x40000000);
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}
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DM_TEST(lib_test_lmb_big, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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/* Simulate 512 MiB RAM, allocate a block without previous reservation */
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static int test_noreserved(struct unit_test_state *uts, const phys_addr_t ram)
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{
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const phys_size_t ram_size = 0x20000000;
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const phys_addr_t ram_end = ram + ram_size;
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struct lmb lmb;
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long ret;
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phys_addr_t a, b;
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/* check for overflow */
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ut_assert(ram_end == 0 || ram_end > ram);
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lmb_init(&lmb);
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ret = lmb_add(&lmb, ram, ram_size);
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ut_asserteq(ret, 0);
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/* allocate a block */
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a = lmb_alloc(&lmb, 4, 1);
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ut_assert(a != 0);
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/* and free it */
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ret = lmb_free(&lmb, a, 4);
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ut_asserteq(ret, 0);
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/* allocate a block with base*/
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b = lmb_alloc_base(&lmb, 4, 1, ram_end);
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ut_assert(a == b);
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/* and free it */
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ret = lmb_free(&lmb, b, 4);
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ut_asserteq(ret, 0);
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return 0;
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}
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static int lib_test_lmb_noreserved(struct unit_test_state *uts)
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{
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return test_noreserved(uts, 0x40000000);
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}
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DM_TEST(lib_test_lmb_noreserved, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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/*
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* Simulate a RAM that starts at 0 and allocate down to address 0, which must
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* fail as '0' means failure for the lmb_alloc functions.
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*/
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static int lib_test_lmb_at_0(struct unit_test_state *uts)
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{
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const phys_addr_t ram = 0;
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const phys_size_t ram_size = 0x20000000;
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struct lmb lmb;
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long ret;
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phys_addr_t a, b;
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lmb_init(&lmb);
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ret = lmb_add(&lmb, ram, ram_size);
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ut_asserteq(ret, 0);
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/* allocate nearly everything */
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a = lmb_alloc(&lmb, ram_size - 4, 1);
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ut_asserteq(a, ram + 4);
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ASSERT_LMB(&lmb, ram, ram_size, 1, a, ram_size - 4,
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0, 0, 0, 0);
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/* allocate the rest */
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/* This should fail as the allocated address would be 0 */
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b = lmb_alloc(&lmb, 4, 1);
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ut_asserteq(b, 0);
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/* check that this was an error by checking lmb */
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ASSERT_LMB(&lmb, ram, ram_size, 1, a, ram_size - 4,
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0, 0, 0, 0);
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/* check that this was an error by freeing b */
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ret = lmb_free(&lmb, b, 4);
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ut_asserteq(ret, -1);
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ASSERT_LMB(&lmb, ram, ram_size, 1, a, ram_size - 4,
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0, 0, 0, 0);
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ret = lmb_free(&lmb, a, ram_size - 4);
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ut_asserteq(ret, 0);
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ASSERT_LMB(&lmb, ram, ram_size, 0, 0, 0, 0, 0, 0, 0);
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return 0;
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}
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DM_TEST(lib_test_lmb_at_0, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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