snark13
8e389c03f8
Реализовать двухпанельный Commander от платформенного PoC до этапов P6-P20: EMM-каталог, сортировку и выбор, операции с файлами и деревьями, транзакционное копирование, метаданные, политику конфликтов и предварительную проверку свободного места. Добавить проектную документацию, HDD/MAME-сценарии и проверенные артефакты. Расширить libc операцией bank_write_page, исправлением режима O_RDONLY и связанными регрессионными проверками.
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/*
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* p1_emm.c — проверка выделения трёх EMM-страниц и доступа через W3.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <sprinter_mem.h>
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#include "p1_platform.h"
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#define P1_PAGE_SIZE 0x4000u
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#define P1_BLOCK 64u
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static uint8_t write_buf[P1_BLOCK];
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static uint8_t read_buf[P1_BLOCK];
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static void make_pattern(uint8_t page_index, uint8_t salt)
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{
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uint8_t i;
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for (i = 0; i < P1_BLOCK; i++) {
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write_buf[i] = (uint8_t)(salt ^ (uint8_t)(page_index * 0x41u + i));
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read_buf[i] = 0;
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}
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}
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static int check_region(uint8_t page, uint8_t page_index,
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uint16_t offset, uint8_t salt)
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{
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make_pattern(page_index, salt);
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bank_write(page, offset, write_buf, P1_BLOCK);
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bank_read(page, offset, read_buf, P1_BLOCK);
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if (memcmp(write_buf, read_buf, P1_BLOCK) != 0) {
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printf("Mismatch: logical=%u phys=%02X offset=%04X\n",
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(unsigned)page_index, (unsigned)page, (unsigned)offset);
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return -1;
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}
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return 0;
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}
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int p1_test_emm(void)
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{
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uint16_t total_before, free_before;
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uint16_t total_after, free_after;
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uint8_t block;
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uint8_t page[3];
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uint8_t i;
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int failed = 0;
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p1_heading("EMM: 3-page allocation and W3 access");
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errno = 0;
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mem_info(&total_before, &free_before);
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printf("Before: total=%u free=%u pages\n",
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(unsigned)total_before, (unsigned)free_before);
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block = mem_alloc_pages(3);
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if (block == 0) {
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printf("mem_alloc_pages(3) failed: errno=%d\n", errno);
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return -1;
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}
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printf("Block id: %u\n", (unsigned)block);
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for (i = 0; i < 3; i++) {
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page[i] = mem_get_page(block, i);
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printf(" logical %u -> physical %02X\n",
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(unsigned)i, (unsigned)page[i]);
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if (page[i] == 0) failed++;
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}
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if (page[0] == page[1] || page[0] == page[2] || page[1] == page[2]) {
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puts("Physical page numbers are not distinct.");
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failed++;
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}
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for (i = 0; i < 3; i++) {
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if (page[i] == 0) continue;
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if (check_region(page[i], i, 0, 0x5A) != 0) failed++;
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if (check_region(page[i], i,
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(uint16_t)(P1_PAGE_SIZE - P1_BLOCK), 0xA5) != 0) {
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failed++;
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}
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}
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mem_free_block(block);
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mem_info(&total_after, &free_after);
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printf("After : total=%u free=%u pages\n",
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(unsigned)total_after, (unsigned)free_after);
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if (total_before != total_after || free_before != free_after) {
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puts("EMM counters were not restored after free.");
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failed++;
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}
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printf("EMM checks failed: %u\n", (unsigned)failed);
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return failed ? -1 : 0;
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}
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