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4dad9a0489
The host-side tools the Nano 3G NAND driver and FTL were developed and tested with, so the evidence in those changes can be reproduced and the next chip can be added without rediscovering any of it: regdiff (register- write comparison against Apple's sequencer programs), ftltest (the host FTL test suite), chiptable.py, the FTL decode notes, and RESULTS.md, the measurements the earlier changes quote. Co-authored-by: Claude Opus 5 <noreply@anthropic.com> Change-Id: I321e06291ca393e18dbd5f71c2c6371fcda9a94d
62 lines
2 KiB
C
62 lines
2 KiB
C
/* The mount's chip checks: a row that is not validated mounts read-only,
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* a row whose reserved-block count does not match the VFL context is
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* refused, and so are unknown layouts and page sizes. */
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#include <stdio.h>
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#include <string.h>
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#include "nand-target.h"
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#include "ftl-target.h"
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#include "mock_nand.h"
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static int fails;
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static void check(const char *what, int ok)
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{
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printf("%s %s\n", ok ? "PASS" : "FAIL", what);
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if (!ok)
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fails++;
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}
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int main(int argc, char **argv)
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{
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static uint8_t buf[4 * NAND_PAGE_SIZE], orig[4 * NAND_PAGE_SIZE];
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const struct nand_geometry good = mock_geo;
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int rc;
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mock_open(argc > 1 ? argv[1] : "../n3g-dump");
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mock_geo.validated = false;
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check("unvalidated row mounts", ftl_init() == 0);
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check("... read-only", !ftl_hook_writeable());
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check("... reads", ftl_read(1000 * 1024, 4, orig) == 0);
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memset(buf, 0x5a, sizeof(buf));
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check("... refuses a write", ftl_write(1000 * 1024, 4, buf) != 0);
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check("... sync does nothing", ftl_sync() == 0);
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check("... no program or erase reached the NAND",
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mock_writes == 0 && mock_erases == 0);
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check("... data unchanged", ftl_read(1000 * 1024, 4, buf) == 0
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&& !memcmp(buf, orig, sizeof(buf)));
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mock_geo = good;
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mock_geo.vflspares = 90;
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rc = ftl_init();
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printf(" vflspares 90: %d\n", rc);
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check("one reserved block too many is refused", rc == -5);
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mock_geo.vflspares = 88;
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rc = ftl_init();
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printf(" vflspares 88: %d\n", rc);
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check("one reserved block too few is refused", rc == -5);
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mock_geo = good;
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mock_geo.layout = NAND_LAYOUT_UNKNOWN;
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check("an unknown layout is refused", ftl_init() == -4);
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mock_geo = good;
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mock_geo.pagesize = 8192;
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check("an unsupported page size is refused", ftl_init() == -4);
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mock_geo = good;
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check("the real row mounts writable",
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ftl_init() == 0 && ftl_hook_writeable());
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puts(fails ? "SOME FAILED" : "ALL PASS");
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return fails != 0;
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}
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