482 lines
16 KiB
C
482 lines
16 KiB
C
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/**
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* Unit tests to verify the "unaligned load handler" in core/exception_vectors.S
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* that allows us to complete byte loads from unaligned memory, etc.
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*
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* Adapted from a test program in 'experiments' that did this.
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*/
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#include "testcase.h"
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#include "esp/rom.h"
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#include "esp/timer.h"
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#include "esp/uart.h"
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#include "espressif/esp_common.h"
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#include "xtensa_ops.h"
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#include "FreeRTOS.h"
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#include "task.h"
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#include "queue.h"
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#include "string.h"
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#include "strings.h"
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#include <malloc.h>
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#define TESTSTRING "O hai there! %d %d %d"
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static char dramtest[] = TESTSTRING;
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static const __attribute__((section(".iram1.notrodata")))
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char iramtest[] = TESTSTRING;
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static const __attribute__((section(".text.notrodata")))
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char iromtest[] = TESTSTRING;
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static const volatile __attribute__((section(".iram1.notliterals")))
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int16_t unsigned_shorts[] = { -3, -4, -5, -32767, 44 };
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static const __attribute__((section(".iram1.notrodata")))
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char sanity_test_data[] = {
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0x01, 0x55, 0x7e, 0x2a, 0x81, 0xd5, 0xfe, 0xaa
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};
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DEFINE_SOLO_TESTCASE(03_byte_load_verify_sections)
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#define PTR_IN_REGION(PTR, START, LEN) \
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((START <= (intptr_t)(PTR)) && ((intptr_t)(PTR) < (START+LEN)))
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/* Sanity check, ensure the addresses of the various test strings
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* are in the correct address space regions. */
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static void a_03_byte_load_verify_sections()
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{
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printf("dramtest addr %p\n", dramtest);
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TEST_ASSERT_MESSAGE(PTR_IN_REGION(dramtest, 0x3FFE8000, 0x14000),
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"dramtest should be in DRAM region");
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printf("iramtest addr %p\n", iramtest);
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TEST_ASSERT_MESSAGE(PTR_IN_REGION(iramtest, 0x40100000, 0x8000),
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"iramtest should be in IRAM region");
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printf("iromtest addr %p\n", iromtest);
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TEST_ASSERT_MESSAGE(PTR_IN_REGION(iromtest, 0x40202010, (0x100000 - 0x2010)),
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"iromtest sohuld be in IROM region");
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printf("unsigned_shorts addr %p\n", unsigned_shorts);
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TEST_ASSERT_MESSAGE(PTR_IN_REGION(unsigned_shorts, 0x40100000, 0x8000),
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"unsigned_shorts should be in IRAM region");
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printf("sanity_test_data addr %p\n", sanity_test_data);
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TEST_ASSERT_MESSAGE(PTR_IN_REGION(sanity_test_data, 0x40100000, 0x8000),
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"sanity_test_data should be in IRAM region");
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TEST_PASS();
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}
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/* test utility functions used for '03_byte_load_test_strings'
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returns the expected string result */
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typedef const char *(* test_with_fn_t)(const char *string);
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static char buf[64];
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static const char * test_memcpy_aligned(const char *string)
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{
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memcpy(buf, string, 16);
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return "O hai there! %d ";
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}
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static const char * test_memcpy_unaligned(const char *string)
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{
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memcpy(buf, string, 15);
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return "O hai there! %d";
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}
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static const char * test_memcpy_unaligned2(const char *string)
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{
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memcpy(buf, string+1, 15);
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return " hai there! %d ";
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}
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static const char * test_strcpy(const char *string)
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{
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strcpy(buf, string);
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return dramtest;
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}
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static const char * test_sprintf(const char *string)
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{
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sprintf(buf, string, 1, 2, 3);
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return "O hai there! 1 2 3";
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}
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static const char * test_sprintf_arg(const char *string)
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{
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sprintf(buf, "%s", string);
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return dramtest;
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}
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static const char * test_naive_strcpy(const char *string)
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{
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char *to = buf;
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while((*to++ = *string++))
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;
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return dramtest;
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}
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static const char * test_naive_strcpy_a0(const char *string)
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{
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asm volatile (
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" mov a8, %0 \n"
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" mov a9, %1 \n"
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"tns_loop%=: l8ui a0, a9, 0 \n"
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" addi.n a9, a9, 1 \n"
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" s8i a0, a8, 0 \n"
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" addi.n a8, a8, 1 \n"
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" bnez a0, tns_loop%=\n"
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: : "r" (buf), "r" (string) : "a0", "a8", "a9");
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return dramtest;
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}
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static const char * test_naive_strcpy_a2(const char *string)
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{
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asm volatile (
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" mov a8, %0 \n"
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" mov a9, %1 \n"
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"tns_loop%=: l8ui a2, a9, 0 \n"
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" addi.n a9, a9, 1 \n"
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" s8i a2, a8, 0 \n"
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" addi.n a8, a8, 1 \n"
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" bnez a2, tns_loop%=\n"
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: : "r" (buf), "r" (string) : "a2", "a8", "a9");
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return dramtest;
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}
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static const char * test_naive_strcpy_a3(const char *string)
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{
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asm volatile (
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" mov a8, %0 \n"
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" mov a9, %1 \n"
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"tns_loop%=: l8ui a3, a9, 0 \n"
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" addi.n a9, a9, 1 \n"
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" s8i a3, a8, 0 \n"
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" addi.n a8, a8, 1 \n"
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" bnez a3, tns_loop%=\n"
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: : "r" (buf), "r" (string) : "a3", "a8", "a9");
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return TESTSTRING;
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}
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static const char * test_naive_strcpy_a4(const char *string)
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{
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asm volatile (
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" mov a8, %0 \n"
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" mov a9, %1 \n"
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"tns_loop%=: l8ui a4, a9, 0 \n"
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" addi.n a9, a9, 1 \n"
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" s8i a4, a8, 0 \n"
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" addi.n a8, a8, 1 \n"
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" bnez a4, tns_loop%=\n"
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: : "r" (buf), "r" (string) : "a4", "a8", "a9");
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return TESTSTRING;
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}
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static const char * test_naive_strcpy_a5(const char *string)
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{
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asm volatile (
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" mov a8, %0 \n"
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" mov a9, %1 \n"
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"tns_loop%=: l8ui a5, a9, 0 \n"
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" addi.n a9, a9, 1 \n"
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" s8i a5, a8, 0 \n"
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" addi.n a8, a8, 1 \n"
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" bnez a5, tns_loop%=\n"
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: : "r" (buf), "r" (string) : "a5", "a8", "a9");
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return TESTSTRING;
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}
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static const char * test_naive_strcpy_a6(const char *string)
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{
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asm volatile (
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" mov a8, %0 \n"
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" mov a9, %1 \n"
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"tns_loop%=: l8ui a6, a9, 0 \n"
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" addi.n a9, a9, 1 \n"
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" s8i a6, a8, 0 \n"
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" addi.n a8, a8, 1 \n"
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" bnez a6, tns_loop%=\n"
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: : "r" (buf), "r" (string) : "a6", "a8", "a9");
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return TESTSTRING;
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}
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static const char * test_noop(const char *string)
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{
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buf[0] = 0;
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return "";
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}
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static uint32_t IRAM inner_string_test(const char *string, test_with_fn_t testfn, const char *testfn_label, uint32_t nullvalue, bool evict_cache)
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{
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printf(" .. against %30s: ", testfn_label);
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vPortEnterCritical();
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uint32_t before;
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RSR(before, CCOUNT);
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const int TEST_REPEATS = 1000;
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for(int i = 0; i < TEST_REPEATS; i++) {
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memset(buf, 0, sizeof(buf));
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const char *expected = testfn(string);
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TEST_ASSERT_EQUAL_STRING_MESSAGE(expected, buf, testfn_label);
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if(evict_cache) {
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Cache_Read_Disable();
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Cache_Read_Enable(0,0,1);
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}
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}
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uint32_t after;
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RSR(after, CCOUNT);
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vPortExitCritical();
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uint32_t instructions = (after-before)/TEST_REPEATS - nullvalue;
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printf("%5d instructions\r\n", instructions);
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return instructions;
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}
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static void string_test(const char *string, char *label, bool evict_cache)
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{
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printf("Testing %s (%p) '%s'\r\n", label, string, string);
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printf("Formats as: '");
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printf(string, 1, 2, 3);
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printf("'\r\n");
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uint32_t nullvalue = inner_string_test(string, test_noop, "null op", 0, evict_cache);
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inner_string_test(string, test_memcpy_aligned, "memcpy - aligned len", nullvalue, evict_cache);
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inner_string_test(string, test_memcpy_unaligned, "memcpy - unaligned len", nullvalue, evict_cache);
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inner_string_test(string, test_memcpy_unaligned2, "memcpy - unaligned start&len", nullvalue, evict_cache);
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inner_string_test(string, test_strcpy, "strcpy", nullvalue, evict_cache);
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inner_string_test(string, test_naive_strcpy, "naive strcpy", nullvalue, evict_cache);
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inner_string_test(string, test_naive_strcpy_a0, "naive strcpy (a0)", nullvalue, evict_cache);
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inner_string_test(string, test_naive_strcpy_a2, "naive strcpy (a2)", nullvalue, evict_cache);
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inner_string_test(string, test_naive_strcpy_a3, "naive strcpy (a3)", nullvalue, evict_cache);
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inner_string_test(string, test_naive_strcpy_a4, "naive strcpy (a4)", nullvalue, evict_cache);
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inner_string_test(string, test_naive_strcpy_a5, "naive strcpy (a5)", nullvalue, evict_cache);
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inner_string_test(string, test_naive_strcpy_a6, "naive strcpy (a6)", nullvalue, evict_cache);
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inner_string_test(string, test_sprintf, "sprintf", nullvalue, evict_cache);
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inner_string_test(string, test_sprintf_arg, "sprintf format arg", nullvalue, evict_cache);
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}
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DEFINE_SOLO_TESTCASE(03_byte_load_test_strings)
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/* Test various operations on strings in various regions */
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static void a_03_byte_load_test_strings()
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{
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string_test(dramtest, "DRAM", 0);
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string_test(iramtest, "IRAM", 0);
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string_test(iromtest, "Cached flash", 0);
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string_test(iromtest, "'Uncached' flash", 1);
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TEST_PASS();
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}
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static volatile bool frc1_ran;
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static volatile bool frc1_finished;
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static volatile char frc1_buf[80];
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DEFINE_SOLO_TESTCASE(03_byte_load_test_isr)
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static void frc1_interrupt_handler(void)
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{
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frc1_ran = true;
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timer_set_run(FRC1, false);
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strcpy((char *)frc1_buf, iramtest);
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frc1_finished = true;
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}
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/* Verify that the unaligned loader can run inside an ISR */
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static void a_03_byte_load_test_isr()
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{
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printf("Testing behaviour inside ISRs...\r\n");
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timer_set_interrupts(FRC1, false);
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timer_set_run(FRC1, false);
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_xt_isr_attach(INUM_TIMER_FRC1, frc1_interrupt_handler);
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timer_set_frequency(FRC1, 1000);
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timer_set_interrupts(FRC1, true);
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timer_set_run(FRC1, true);
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sdk_os_delay_us(2000);
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if(!frc1_ran)
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TEST_FAIL_MESSAGE("ERROR: FRC1 timer exception never fired.\r\n");
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else if(!frc1_finished)
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TEST_FAIL_MESSAGE("ERROR: FRC1 timer exception never finished.\r\n");
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else if(strcmp((char *)frc1_buf, iramtest))
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TEST_FAIL_MESSAGE("ERROR: FRC1 strcpy from IRAM failed.\r\n");
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else
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TEST_PASS();
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}
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DEFINE_SOLO_TESTCASE(03_byte_load_test_sign_extension)
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static void a_03_byte_load_test_sign_extension()
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{
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/* this step seems to be necessary so the compiler will actually generate l16si */
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int16_t *shorts_p = (int16_t *)unsigned_shorts;
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if(shorts_p[0] == -3 && shorts_p[1] == -4 && shorts_p[2] == -5 && shorts_p[3] == -32767 && shorts_p[4] == 44)
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{
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TEST_PASS();
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} else {
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sprintf(buf, "l16si sign extension failed. Got values %d %d %d %d %d\r\n", shorts_p[0], shorts_p[1], shorts_p[2], shorts_p[3], shorts_p[4]);
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TEST_FAIL_MESSAGE(buf);
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}
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}
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/* test that running unaligned loads in a running FreeRTOS system doesn't break things
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The following tests run inside a FreeRTOS task, after everything else.
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*/
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DEFINE_SOLO_TESTCASE(03_byte_load_test_system_interaction);
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static void task_load_test_system_interaction()
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{
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uint32_t start = xTaskGetTickCount();
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printf("Starting system/timer interaction test (takes approx 1 second)...\n");
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for(int i = 0; i < 5000; i++) {
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test_naive_strcpy_a0(iromtest);
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test_naive_strcpy_a2(iromtest);
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test_naive_strcpy_a3(iromtest);
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||
|
|
test_naive_strcpy_a4(iromtest);
|
||
|
|
test_naive_strcpy_a5(iromtest);
|
||
|
|
test_naive_strcpy_a6(iromtest);
|
||
|
|
/*
|
||
|
|
const volatile char *string = iromtest;
|
||
|
|
volatile char *to = dest;
|
||
|
|
while((*to++ = *string++))
|
||
|
|
;
|
||
|
|
*/
|
||
|
|
}
|
||
|
|
uint32_t ticks = xTaskGetTickCount() - start;
|
||
|
|
printf("Timer interaction test PASSED after %d ticks.\n", ticks);
|
||
|
|
TEST_PASS();
|
||
|
|
}
|
||
|
|
|
||
|
|
static void a_03_byte_load_test_system_interaction()
|
||
|
|
{
|
||
|
|
xTaskCreate(task_load_test_system_interaction, "interactionTask", 256, NULL, 2, NULL);
|
||
|
|
while(1) {
|
||
|
|
vTaskDelay(100);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* The following "sanity tests" are designed to try to execute every code path
|
||
|
|
* of the LoadStoreError handler, with a variety of offsets and data values
|
||
|
|
* designed to catch any mask/shift errors, sign-extension bugs, etc */
|
||
|
|
DEFINE_SOLO_TESTCASE(03_byte_load_test_sanity)
|
||
|
|
|
||
|
|
/* (Contrary to expectations, 'mov a15, a15' in Xtensa is not technically a
|
||
|
|
* no-op, but is officially "undefined and reserved for future use", so we need
|
||
|
|
* a special case in the case where reg == "a15" so we don't end up generating
|
||
|
|
* those opcodes. GCC is smart enough to optimize away the whole conditional
|
||
|
|
* and just insert the correct asm block, since `reg` is a static argument.) */
|
||
|
|
#define LOAD_VIA_REG(op, reg, addr, var) \
|
||
|
|
if (strcmp(reg, "a15")) { \
|
||
|
|
asm volatile ( \
|
||
|
|
"mov a15, " reg "\n\t" \
|
||
|
|
op " " reg ", %1, 0\n\t" \
|
||
|
|
"mov %0, " reg "\n\t" \
|
||
|
|
"mov " reg ", a15\n\t" \
|
||
|
|
: "=r" (var) : "r" (addr) : "a15" ); \
|
||
|
|
} else { \
|
||
|
|
asm volatile ( \
|
||
|
|
op " " reg ", %1, 0\n\t" \
|
||
|
|
"mov %0, " reg "\n\t" \
|
||
|
|
: "=r" (var) : "r" (addr) : "a15" ); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define TEST_LOAD(op, reg, addr, value) \
|
||
|
|
{ \
|
||
|
|
int32_t result; \
|
||
|
|
LOAD_VIA_REG(op, reg, addr, result); \
|
||
|
|
if (result != value) sanity_test_failed(op, reg, addr, value, result); \
|
||
|
|
}
|
||
|
|
|
||
|
|
static void sanity_test_failed(const char *testname, const char *reg, const void *addr, int32_t value, int32_t result) {
|
||
|
|
uint32_t actual_data = *(uint32_t *)((uint32_t)addr & 0xfffffffc);
|
||
|
|
sprintf(buf, "%s %s from %p (32-bit value: 0x%x): Expected 0x%08x (%d), got 0x%08x (%d)\n", testname, reg, addr, actual_data, value, value, result, result);
|
||
|
|
TEST_FAIL_MESSAGE(buf);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void sanity_test_l8ui(const void *addr, int32_t value) {
|
||
|
|
TEST_LOAD("l8ui", "a0", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a1", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a2", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a3", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a4", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a5", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a6", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a7", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a8", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a9", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a10", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a11", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a12", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a13", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a14", addr, value);
|
||
|
|
TEST_LOAD("l8ui", "a15", addr, value);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void sanity_test_l16ui(const void *addr, int32_t value) {
|
||
|
|
TEST_LOAD("l16ui", "a0", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a1", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a2", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a3", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a4", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a5", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a6", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a7", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a8", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a9", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a10", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a11", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a12", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a13", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a14", addr, value);
|
||
|
|
TEST_LOAD("l16ui", "a15", addr, value);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void sanity_test_l16si(const void *addr, int32_t value) {
|
||
|
|
TEST_LOAD("l16si", "a0", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a1", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a2", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a3", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a4", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a5", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a6", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a7", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a8", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a9", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a10", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a11", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a12", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a13", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a14", addr, value);
|
||
|
|
TEST_LOAD("l16si", "a15", addr, value);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void a_03_byte_load_test_sanity(void) {
|
||
|
|
printf("== Performing sanity tests (sanity_test_data @ %p)...\n", sanity_test_data);
|
||
|
|
|
||
|
|
sanity_test_l8ui(sanity_test_data + 0, 0x01);
|
||
|
|
sanity_test_l8ui(sanity_test_data + 1, 0x55);
|
||
|
|
sanity_test_l8ui(sanity_test_data + 2, 0x7e);
|
||
|
|
sanity_test_l8ui(sanity_test_data + 3, 0x2a);
|
||
|
|
sanity_test_l8ui(sanity_test_data + 4, 0x81);
|
||
|
|
sanity_test_l8ui(sanity_test_data + 5, 0xd5);
|
||
|
|
sanity_test_l8ui(sanity_test_data + 6, 0xfe);
|
||
|
|
sanity_test_l8ui(sanity_test_data + 7, 0xaa);
|
||
|
|
|
||
|
|
sanity_test_l16ui(sanity_test_data + 0, 0x5501);
|
||
|
|
sanity_test_l16ui(sanity_test_data + 2, 0x2a7e);
|
||
|
|
sanity_test_l16ui(sanity_test_data + 4, 0xd581);
|
||
|
|
sanity_test_l16ui(sanity_test_data + 6, 0xaafe);
|
||
|
|
|
||
|
|
sanity_test_l16si(sanity_test_data + 0, 0x5501);
|
||
|
|
sanity_test_l16si(sanity_test_data + 2, 0x2a7e);
|
||
|
|
sanity_test_l16si(sanity_test_data + 4, -10879);
|
||
|
|
sanity_test_l16si(sanity_test_data + 6, -21762);
|
||
|
|
|
||
|
|
printf("== Sanity tests completed.\n");
|
||
|
|
TEST_PASS();
|
||
|
|
}
|