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Diffstat (limited to 'tests/tcg/multiarch/system/memory.c')
| -rw-r--r-- | tests/tcg/multiarch/system/memory.c | 449 |
1 files changed, 449 insertions, 0 deletions
diff --git a/tests/tcg/multiarch/system/memory.c b/tests/tcg/multiarch/system/memory.c new file mode 100644 index 0000000000..dc1d8a98ff --- /dev/null +++ b/tests/tcg/multiarch/system/memory.c @@ -0,0 +1,449 @@ +/* + * Memory Test + * + * This is intended to test the softmmu code and ensure we properly + * behave across normal and unaligned accesses across several pages. + * We are not replicating memory tests for stuck bits and other + * hardware level failures but looking for issues with different size + * accesses when access is: + * + * - unaligned at various sizes (if -DCHECK_UNALIGNED set) + * - spanning a (softmmu) page + * - sign extension when loading + */ + +#include <inttypes.h> +#include <stdbool.h> +#include <minilib.h> + +#ifndef CHECK_UNALIGNED +# error "Target does not specify CHECK_UNALIGNED" +#endif + +#define PAGE_SIZE 4096 /* nominal 4k "pages" */ +#define TEST_SIZE (PAGE_SIZE * 4) /* 4 pages */ + +#define ARRAY_SIZE(x) ((sizeof(x) / sizeof((x)[0]))) + +__attribute__((aligned(PAGE_SIZE))) +static uint8_t test_data[TEST_SIZE]; + +typedef void (*init_ufn) (int offset); +typedef bool (*read_ufn) (int offset); +typedef bool (*read_sfn) (int offset, bool nf); + +static void pdot(int count) +{ + if (count % 128 == 0) { + ml_printf("."); + } +} + +/* + * Helper macros for shift/extract so we can keep our endian handling + * in one place. + */ +#define BYTE_SHIFT(b, pos) ((uint64_t)b << (pos * 8)) +#define BYTE_EXTRACT(b, pos) ((b >> (pos * 8)) & 0xff) + +/* + * Fill the data with ascending value bytes. + * + * Currently we only support Little Endian machines so write in + * ascending address order. When we read higher address bytes should + * either be zero or higher than the lower bytes. + */ + +static void init_test_data_u8(int unused_offset) +{ + uint8_t count = 0, *ptr = &test_data[0]; + int i; + (void)(unused_offset); + + ml_printf("Filling test area with u8:"); + for (i = 0; i < TEST_SIZE; i++) { + *ptr++ = count++; + pdot(i); + } + ml_printf("done\n"); +} + +/* + * Full the data with alternating positive and negative bytes. This + * should mean for reads larger than a byte all subsequent reads will + * stay either negative or positive. We never write 0. + */ + +static inline uint8_t get_byte(int index, bool neg) +{ + return neg ? (0xff << (index % 7)) : (0xff >> ((index % 6) + 1)); +} + +static void init_test_data_s8(bool neg_first) +{ + uint8_t top, bottom, *ptr = &test_data[0]; + int i; + + ml_printf("Filling test area with s8 pairs (%s):", + neg_first ? "neg first" : "pos first"); + for (i = 0; i < TEST_SIZE / 2; i++) { + *ptr++ = get_byte(i, neg_first); + *ptr++ = get_byte(i, !neg_first); + pdot(i); + } + ml_printf("done\n"); +} + +/* + * Zero the first few bytes of the test data in preparation for + * new offset values. + */ +static void reset_start_data(int offset) +{ + uint32_t *ptr = (uint32_t *) &test_data[0]; + int i; + for (i = 0; i < offset; i++) { + *ptr++ = 0; + } +} + +static void init_test_data_u16(int offset) +{ + uint8_t count = 0; + uint16_t word, *ptr = (uint16_t *) &test_data[offset]; + const int max = (TEST_SIZE - offset) / sizeof(word); + int i; + + ml_printf("Filling test area with u16 (offset %d, %p):", offset, ptr); + + reset_start_data(offset); + + for (i = 0; i < max; i++) { + uint8_t low = count++, high = count++; + word = BYTE_SHIFT(high, 1) | BYTE_SHIFT(low, 0); + *ptr++ = word; + pdot(i); + } + ml_printf("done @ %p\n", ptr); +} + +static void init_test_data_u32(int offset) +{ + uint8_t count = 0; + uint32_t word, *ptr = (uint32_t *) &test_data[offset]; + const int max = (TEST_SIZE - offset) / sizeof(word); + int i; + + ml_printf("Filling test area with u32 (offset %d, %p):", offset, ptr); + + reset_start_data(offset); + + for (i = 0; i < max; i++) { + uint8_t b4 = count++, b3 = count++; + uint8_t b2 = count++, b1 = count++; + word = BYTE_SHIFT(b1, 3) | BYTE_SHIFT(b2, 2) | BYTE_SHIFT(b3, 1) | b4; + *ptr++ = word; + pdot(i); + } + ml_printf("done @ %p\n", ptr); +} + +static void init_test_data_u64(int offset) +{ + uint8_t count = 0; + uint64_t word, *ptr = (uint64_t *) &test_data[offset]; + const int max = (TEST_SIZE - offset) / sizeof(word); + int i; + + ml_printf("Filling test area with u64 (offset %d, %p):", offset, ptr); + + reset_start_data(offset); + + for (i = 0; i < max; i++) { + uint8_t b8 = count++, b7 = count++; + uint8_t b6 = count++, b5 = count++; + uint8_t b4 = count++, b3 = count++; + uint8_t b2 = count++, b1 = count++; + word = BYTE_SHIFT(b1, 7) | BYTE_SHIFT(b2, 6) | BYTE_SHIFT(b3, 5) | + BYTE_SHIFT(b4, 4) | BYTE_SHIFT(b5, 3) | BYTE_SHIFT(b6, 2) | + BYTE_SHIFT(b7, 1) | b8; + *ptr++ = word; + pdot(i); + } + ml_printf("done @ %p\n", ptr); +} + +static bool read_test_data_u16(int offset) +{ + uint16_t word, *ptr = (uint16_t *)&test_data[offset]; + int i; + const int max = (TEST_SIZE - offset) / sizeof(word); + + ml_printf("Reading u16 from %#lx (offset %d):", ptr, offset); + + for (i = 0; i < max; i++) { + uint8_t high, low; + word = *ptr++; + high = (word >> 8) & 0xff; + low = word & 0xff; + if (high < low && high != 0) { + ml_printf("Error %d < %d\n", high, low); + return false; + } else { + pdot(i); + } + + } + ml_printf("done @ %p\n", ptr); + return true; +} + +static bool read_test_data_u32(int offset) +{ + uint32_t word, *ptr = (uint32_t *)&test_data[offset]; + int i; + const int max = (TEST_SIZE - offset) / sizeof(word); + + ml_printf("Reading u32 from %#lx (offset %d):", ptr, offset); + + for (i = 0; i < max; i++) { + uint8_t b1, b2, b3, b4; + word = *ptr++; + + b1 = word >> 24 & 0xff; + b2 = word >> 16 & 0xff; + b3 = word >> 8 & 0xff; + b4 = word & 0xff; + + if ((b1 < b2 && b1 != 0) || + (b2 < b3 && b2 != 0) || + (b3 < b4 && b3 != 0)) { + ml_printf("Error %d, %d, %d, %d", b1, b2, b3, b4); + return false; + } else { + pdot(i); + } + } + ml_printf("done @ %p\n", ptr); + return true; +} + +static bool read_test_data_u64(int offset) +{ + uint64_t word, *ptr = (uint64_t *)&test_data[offset]; + int i; + const int max = (TEST_SIZE - offset) / sizeof(word); + + ml_printf("Reading u64 from %#lx (offset %d):", ptr, offset); + + for (i = 0; i < max; i++) { + uint8_t b1, b2, b3, b4, b5, b6, b7, b8; + word = *ptr++; + + b1 = ((uint64_t) (word >> 56)) & 0xff; + b2 = ((uint64_t) (word >> 48)) & 0xff; + b3 = ((uint64_t) (word >> 40)) & 0xff; + b4 = (word >> 32) & 0xff; + b5 = (word >> 24) & 0xff; + b6 = (word >> 16) & 0xff; + b7 = (word >> 8) & 0xff; + b8 = (word >> 0) & 0xff; + + if ((b1 < b2 && b1 != 0) || + (b2 < b3 && b2 != 0) || + (b3 < b4 && b3 != 0) || + (b4 < b5 && b4 != 0) || + (b5 < b6 && b5 != 0) || + (b6 < b7 && b6 != 0) || + (b7 < b8 && b7 != 0)) { + ml_printf("Error %d, %d, %d, %d, %d, %d, %d, %d", + b1, b2, b3, b4, b5, b6, b7, b8); + return false; + } else { + pdot(i); + } + } + ml_printf("done @ %p\n", ptr); + return true; +} + +/* Read the test data and verify at various offsets */ +read_ufn read_ufns[] = { read_test_data_u16, + read_test_data_u32, + read_test_data_u64 }; + +bool do_unsigned_reads(void) +{ + int i; + bool ok = true; + + for (i = 0; i < ARRAY_SIZE(read_ufns) && ok; i++) { +#if CHECK_UNALIGNED + int off; + for (off = 0; off < 8 && ok; off++) { + ok = read_ufns[i](off); + } +#else + ok = read_ufns[i](0); +#endif + } + + return ok; +} + +static bool do_unsigned_test(init_ufn fn) +{ +#if CHECK_UNALIGNED + bool ok = true; + int i; + for (i = 0; i < 8 && ok; i++) { + fn(i); + ok = do_unsigned_reads(); + } +#else + fn(0); + return do_unsigned_reads(); +#endif +} + +/* + * We need to ensure signed data is read into a larger data type to + * ensure that sign extension is working properly. + */ + +static bool read_test_data_s8(int offset, bool neg_first) +{ + int8_t *ptr = (int8_t *)&test_data[offset]; + int i; + const int max = (TEST_SIZE - offset) / 2; + + ml_printf("Reading s8 pairs from %#lx (offset %d):", ptr, offset); + + for (i = 0; i < max; i++) { + int16_t first, second; + bool ok; + first = *ptr++; + second = *ptr++; + + if (neg_first && first < 0 && second > 0) { + pdot(i); + } else if (!neg_first && first > 0 && second < 0) { + pdot(i); + } else { + ml_printf("Error %d %c %d\n", first, neg_first ? '<' : '>', second); + return false; + } + } + ml_printf("done @ %p\n", ptr); + return true; +} + +static bool read_test_data_s16(int offset, bool neg_first) +{ + int16_t *ptr = (int16_t *)&test_data[offset]; + int i; + const int max = (TEST_SIZE - offset) / (sizeof(*ptr)); + + ml_printf("Reading s16 from %#lx (offset %d, %s):", ptr, + offset, neg_first ? "neg" : "pos"); + + for (i = 0; i < max; i++) { + int32_t data = *ptr++; + + if (neg_first && data < 0) { + pdot(i); + } else if (data > 0) { + pdot(i); + } else { + ml_printf("Error %d %c 0\n", data, neg_first ? '<' : '>'); + return false; + } + } + ml_printf("done @ %p\n", ptr); + return true; +} + +static bool read_test_data_s32(int offset, bool neg_first) +{ + int32_t *ptr = (int32_t *)&test_data[offset]; + int i; + const int max = (TEST_SIZE - offset) / (sizeof(int32_t)); + + ml_printf("Reading s32 from %#lx (offset %d, %s):", + ptr, offset, neg_first ? "neg" : "pos"); + + for (i = 0; i < max; i++) { + int64_t data = *ptr++; + + if (neg_first && data < 0) { + pdot(i); + } else if (data > 0) { + pdot(i); + } else { + ml_printf("Error %d %c 0\n", data, neg_first ? '<' : '>'); + return false; + } + } + ml_printf("done @ %p\n", ptr); + return true; +} + +/* + * Read the test data and verify at various offsets + * + * For everything except bytes all our reads should be either positive + * or negative depending on what offset we are reading from. Currently + * we only handle LE systems. + */ +read_sfn read_sfns[] = { read_test_data_s8, + read_test_data_s16, + read_test_data_s32 }; + +bool do_signed_reads(bool neg_first) +{ + int i; + bool ok = true; + + for (i = 0; i < ARRAY_SIZE(read_sfns) && ok; i++) { +#if CHECK_UNALIGNED + int off; + for (off = 0; off < 8 && ok; off++) { + bool nf = i == 0 ? neg_first ^ (off & 1) : !(neg_first ^ (off & 1)); + ok = read_sfns[i](off, nf); + } +#else + ok = read_sfns[i](0, i == 0 ? neg_first : !neg_first); +#endif + } + + return ok; +} + +init_ufn init_ufns[] = { init_test_data_u8, + init_test_data_u16, + init_test_data_u32, + init_test_data_u64 }; + +int main(void) +{ + int i; + bool ok = true; + + /* Run through the unsigned tests first */ + for (i = 0; i < ARRAY_SIZE(init_ufns) && ok; i++) { + ok = do_unsigned_test(init_ufns[i]); + } + + if (ok) { + init_test_data_s8(false); + ok = do_signed_reads(false); + } + + if (ok) { + init_test_data_s8(true); + ok = do_signed_reads(true); + } + + ml_printf("Test complete: %s\n", ok ? "PASSED" : "FAILED"); + return ok ? 0 : -1; +} |