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Fixed NOR extended cache zero base handling

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Co-authored-by: Codex <codex@openai.com>
This commit is contained in:
Frédéric Desbiens
2026-06-30 10:04:02 -04:00
co-authored by Codex
parent 3729d2f2c2
commit 6122a080be
6 changed files with 377 additions and 64 deletions
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common/src/lx_nor_flash_driver_block_erase.c
+24 -14
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@@ -9,6 +9,8 @@
* SPDX-License-Identifier: MIT
**************************************************************************/
// Some portions generated by Codex (GPT-5).
/**************************************************************************/
/**************************************************************************/
@@ -76,15 +78,19 @@ UINT status;
#ifndef LX_NOR_DISABLE_EXTENDED_CACHE
UINT i;
ULONG *block_start_address;
ULONG *block_end_address;
ULONG block_start_address;
ULONG block_end_address;
ULONG *cache_entry_start;
ULONG *cache_entry_end;
ULONG cache_entry_start_value;
ULONG cache_entry_end_value;
/* Calculate the block starting address. */
block_start_address = nor_flash -> lx_nor_flash_base_address + (block * nor_flash -> lx_nor_flash_words_per_block);
block_end_address = block_start_address + nor_flash -> lx_nor_flash_words_per_block;
/* Calculate the block starting address.
MISRA C:2012 Rule 11.4 deviation: NOR driver addresses may be logical
address tokens, including zero, so compare address values without
dereferencing them. */
block_start_address = (ULONG)(nor_flash -> lx_nor_flash_base_address) + (block * nor_flash -> lx_nor_flash_words_per_block * sizeof(ULONG));
block_end_address = block_start_address + (nor_flash -> lx_nor_flash_words_per_block * sizeof(ULONG));
/* Loop through the cache entries to see if there is a sector in cache. */
for (i = 0; i < nor_flash -> lx_nor_flash_extended_cache_entries; i++)
@@ -94,15 +100,21 @@ ULONG *cache_entry_end;
/* Determine the cache entry addresses. */
cache_entry_start = nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_sector_address;
cache_entry_end = cache_entry_start + LX_NOR_SECTOR_SIZE;
/* Determine if the flash address in in the cache entry. */
if ((cache_entry_start) && (block_start_address <= cache_entry_start) && (block_end_address > cache_entry_end))
/* Determine if the cache entry is in the block being erased. */
if (nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_valid)
{
cache_entry_start_value = (ULONG)cache_entry_start;
cache_entry_end_value = cache_entry_start_value + (LX_NOR_SECTOR_SIZE * sizeof(ULONG));
/* Yes, this cache entry is in the block to be erased so invalidate it. */
nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_sector_address = LX_NULL;
nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_access_count = 0;
if ((block_start_address <= cache_entry_start_value) && (block_end_address > cache_entry_end_value))
{
/* Yes, this cache entry is in the block to be erased so invalidate it. */
nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_sector_address = LX_NULL;
nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_access_count = 0;
nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_valid = LX_FALSE;
}
}
}
#endif
@@ -117,5 +129,3 @@ ULONG *cache_entry_end;
/* Return completion status. */
return(status);
}