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Update Mass Storage bootloader for Linux compatibility, and to reduce the compiled bootloader size. Linux appears to replace files with a cluster offset on the disk rather than re-using the same disk clusters (unlike Windows) so the file offset needs to be tracked and compensated for.

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This commit is contained in:
Dean Camera 2013-03-29 10:23:09 +00:00
parent 148b434228
commit 83d5c4729e
3 changed files with 133 additions and 94 deletions
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29
Bootloaders/MassStorage/Lib/VirtualFAT.h
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@ -121,6 +121,23 @@
#define FAT_ORDINAL_LAST_ENTRY (1 << 6)
//@}
/* Enums: */
enum
{
DISK_FILE_ENTRY_VolumeID = 0,
DISK_FILE_ENTRY_FirmwareLFN = 1,
DISK_FILE_ENTRY_FirmwareMSDOS = 2,
};
enum
{
DISK_BLOCK_BootBlock = 0,
DISK_BLOCK_FATBlock1 = 1,
DISK_BLOCK_FATBlock2 = 2,
DISK_BLOCK_RootFilesBlock = 3,
DISK_BLOCK_DataStartBlock = 4,
};
/* Type Definitions: */
/** FAT boot block structure definition, used to identify the core
* parameters of a FAT filesystem stored on a disk.
@ -213,13 +230,13 @@
static void UpdateFAT12ClusterEntry(uint8_t* const FATTable,
const uint16_t Index,
const uint16_t ChainEntry) AUX_BOOT_SECTION;
static void WriteVirtualBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
static void ReadVirtualBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
static void ReadWriteFirmwareFileBlock(const uint16_t BlockNumber,
uint8_t* BlockBuffer,
const bool Read) AUX_BOOT_SECTION;
#endif
void VirtualFAT_WriteBlocks(const uint16_t BlockAddress,
uint16_t TotalBlocks) AUX_BOOT_SECTION;
void VirtualFAT_WriteBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
void VirtualFAT_ReadBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
void VirtualFAT_ReadBlocks(const uint16_t BlockAddress,
uint16_t TotalBlocks) AUX_BOOT_SECTION;
#endif