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-rw-r--r--Source/Kernel/Devices/Floppy/FloppyController.class.cpp3
-rw-r--r--Source/Kernel/Devices/Floppy/FloppyDrive.class.cpp27
-rw-r--r--Source/Kernel/Devices/Floppy/FloppyDrive.class.h2
-rw-r--r--Source/Kernel/FileSystems/FAT/FATFS.class.cpp10
-rw-r--r--Source/Kernel/FileSystems/FAT/FATFS.class.h8
-rw-r--r--Source/Kernel/VFS/BlockCache.class.cpp89
-rw-r--r--Source/Kernel/VFS/BlockCache.class.h32
-rw-r--r--Source/Kernel/VFS/Part.ns.cpp2
-rw-r--r--Source/Kernel/VFS/Partition.class.cpp8
-rw-r--r--Source/Kernel/VFS/Partition.class.h2
-rw-r--r--Source/Kernel/VFS/VFS.ns.cpp1
11 files changed, 157 insertions, 27 deletions
diff --git a/Source/Kernel/Devices/Floppy/FloppyController.class.cpp b/Source/Kernel/Devices/Floppy/FloppyController.class.cpp
index db148d0..7201c5c 100644
--- a/Source/Kernel/Devices/Floppy/FloppyController.class.cpp
+++ b/Source/Kernel/Devices/Floppy/FloppyController.class.cpp
@@ -153,7 +153,6 @@ void FloppyController::setDOR() {
checkInterrupt(&st0, &cyl);
m_first = false;
}
- //PANIC("test");
}
void FloppyController::setActiveDrive(u8int drive) {
@@ -190,10 +189,10 @@ u8int FloppyController::readData() {
bool FloppyController::reset() {
outb(m_base + FR_DOR, 0x00); //Disable controller
m_first = true;
- setNoActiveDrive();
if (m_drives[0] != NULL) m_drives[0]->m_motorState = 0;
if (m_drives[1] != NULL) m_drives[1]->m_motorState = 0;
+ setNoActiveDrive();
for (int i = 0; i < 2; i++) {
if (m_drives[i] != NULL) {
diff --git a/Source/Kernel/Devices/Floppy/FloppyDrive.class.cpp b/Source/Kernel/Devices/Floppy/FloppyDrive.class.cpp
index 4036927..b7fd69b 100644
--- a/Source/Kernel/Devices/Floppy/FloppyDrive.class.cpp
+++ b/Source/Kernel/Devices/Floppy/FloppyDrive.class.cpp
@@ -92,7 +92,10 @@ bool FloppyDrive::calibrate() {
int st0, cyl = -1;
- if (!setMotorState(true)) return false;
+ if (!setMotorState(true)) {
+ *kvt << getName() << ": calibrate fail\n";
+ return false;
+ }
for (int i = 0; i < 10; i++) {
m_fdc->resetIrq();
@@ -138,18 +141,17 @@ bool FloppyDrive::killMotor() {
return true;
}
-bool FloppyDrive::seek(u32int cyli, s32int head) {
+bool FloppyDrive::seek(u32int cyli, s32int head, bool recursive) {
if (cyli >= m_cylinders) return false;
- m_fdc->setActiveDrive(m_driveNumber);
setMotorState(true); //Turn on motor
int st0, cyl = -1;
- for (u32int i = 0; i < 10; i++) {
+ for (u32int i = 0; i < (recursive ? 10 : 5); i++) {
m_fdc->resetIrq();
m_fdc->writeCmd(FC_SEEK);
- m_fdc->writeCmd(head << 2);
+ m_fdc->writeCmd(head << 2 | m_driveNumber);
m_fdc->writeCmd(cyl);
m_fdc->waitIrq();
@@ -160,20 +162,23 @@ bool FloppyDrive::seek(u32int cyli, s32int head) {
}
if (cyl == 0xFF or cyl == 0x00 or cyl == (int)cyli) { //0xFF for bochs, 0x00 for qemu :D
setMotorState(false);
- m_fdc->setNoActiveDrive();
return true;
}
}
- setMotorState(false);
- m_fdc->setNoActiveDrive();
- *kvt << getName() << ": seek fail\n";
- return false;
+ if (recursive) {
+ setMotorState(false);
+ *kvt << getName() << ": seek fail\n";
+ return false;
+ } else {
+ calibrate();
+ return seek(cyli, head, true);
+ }
}
bool FloppyDrive::doTrack(u32int cyl, u8int dir) {
+ m_fdc->setActiveDrive(m_driveNumber);
if (!seek(cyl, 0)) return false;
if (!seek(cyl, 1)) return false;
- m_fdc->setActiveDrive(m_driveNumber);
u8int cmd, flags = 0xC0;
switch (dir) {
diff --git a/Source/Kernel/Devices/Floppy/FloppyDrive.class.h b/Source/Kernel/Devices/Floppy/FloppyDrive.class.h
index 75926ea..73229b1 100644
--- a/Source/Kernel/Devices/Floppy/FloppyDrive.class.h
+++ b/Source/Kernel/Devices/Floppy/FloppyDrive.class.h
@@ -22,7 +22,7 @@ class FloppyDrive : public BlockDevice {
bool calibrate();
bool setMotorState(bool on);
bool killMotor();
- bool seek(u32int cyli, s32int head);
+ bool seek(u32int cyli, s32int head, bool recursive = false);
bool doTrack(u32int cyl, u8int dir);
public:
diff --git a/Source/Kernel/FileSystems/FAT/FATFS.class.cpp b/Source/Kernel/FileSystems/FAT/FATFS.class.cpp
index e4cb40c..35c18eb 100644
--- a/Source/Kernel/FileSystems/FAT/FATFS.class.cpp
+++ b/Source/Kernel/FileSystems/FAT/FATFS.class.cpp
@@ -25,7 +25,7 @@ FileSystem* FATFS::mount(Partition* p, DirectoryNode* mountpoint, bool readwrite
if (bs.s.extBS_16.boot_signature != 0x28 and bs.s.extBS_16.boot_signature != 0x29
and bs.s.extBS_32.boot_signature != 0x28 and bs.s.extBS_32.boot_signature != 0x29) return 0;
// *** DO SOME CALCULATIONS ***
- FATFS* fs = new FATFS();
+ FATFS* fs = new FATFS(p);
fs->m_fatSize = (bs.s.table_size_16 == 0 ? bs.s.extBS_32.table_size_32 : bs.s.table_size_16);
fs->m_totalSectors = (bs.s.total_sectors_16 == 0 ? bs.s.total_sectors_32 : bs.s.total_sectors_16);
fs->m_rootDirSectors = ((bs.s.root_entry_count * 32) + (bs.s.bytes_per_sector - 1)) / bs.s.bytes_per_sector;
@@ -42,7 +42,6 @@ FileSystem* FATFS::mount(Partition* p, DirectoryNode* mountpoint, bool readwrite
}
fs->m_readOnly = true;
fs->m_bs = bs.s;
- fs->m_part = p;
// *** CREATE ROOT DIRECTORY NODE ***
fs->m_rootNode = new FATDirectoryNode("/", fs, mountpoint);
FIRSTCLUS(fs->m_rootNode) = 2;
@@ -52,6 +51,7 @@ FileSystem* FATFS::mount(Partition* p, DirectoryNode* mountpoint, bool readwrite
delete fs;
return 0;
}
+ fs->m_fatCache.init(fs->m_fatType == 12 ? 8 : (fs->m_fatType == 16 ? 20 : 40));
if (mountpoint != 0) mountpoint->mount(fs->m_rootNode);
VFS::registerFilesystem(fs);
*kvt << "Detected a FAT" << (s64int)fs->m_fatType << " filesystem.\n" <<
@@ -69,7 +69,7 @@ u32int FATFS::nextCluster(u32int cluster) {
u32int fat_offset = cluster + (cluster / 2);
u32int fat_sector = m_bs.reserved_sector_count + (fat_offset / m_part->getBlockSize());
u32int ent_offset = fat_offset % m_part->getBlockSize();
- m_part->readBlocks(fat_sector, 1, fat_table);
+ m_fatCache.readBlocks(fat_sector, 1, fat_table);
u16int tblval = *(u16int*)&fat_table[ent_offset];
if (cluster & 1) val = tblval >> 4;
else val = tblval & 0x0FFF;
@@ -78,7 +78,7 @@ u32int FATFS::nextCluster(u32int cluster) {
u32int fat_offset = cluster * 2;
u32int fat_sector = m_bs.reserved_sector_count + (fat_offset / m_part->getBlockSize());
u32int ent_offset = fat_offset % m_part->getBlockSize();
- m_part->readBlocks(fat_sector, 1, fat_table);
+ m_fatCache.readBlocks(fat_sector, 1, fat_table);
u16int tblval = *(u16int*)&fat_table[ent_offset];
val = tblval;
if (tblval >= 0xFFF7) val = 0;
@@ -86,7 +86,7 @@ u32int FATFS::nextCluster(u32int cluster) {
u32int fat_offset = cluster * 4;
u32int fat_sector = m_bs.reserved_sector_count + (fat_offset / m_part->getBlockSize());
u32int ent_offset = fat_offset % m_part->getBlockSize();
- m_part->readBlocks(fat_sector, 1, fat_table);
+ m_fatCache.readBlocks(fat_sector, 1, fat_table);
val = *(u32int*)&fat_table[ent_offset] & 0x0FFFFFFF;
if (val >= 0x0FFFFFF7) val = 0;
}
diff --git a/Source/Kernel/FileSystems/FAT/FATFS.class.h b/Source/Kernel/FileSystems/FAT/FATFS.class.h
index 251b2a8..fbefc02 100644
--- a/Source/Kernel/FileSystems/FAT/FATFS.class.h
+++ b/Source/Kernel/FileSystems/FAT/FATFS.class.h
@@ -3,6 +3,7 @@
#include <VFS/FileSystem.proto.h>
#include <VFS/Part.ns.h>
+#include <VFS/BlockCache.class.h>
struct fat_extBS_32_t { //Extended boot sector for FAT32
unsigned int table_size_32;
@@ -88,9 +89,6 @@ struct fat_dir_entry_t {
class FATFS : public FileSystem {
private:
- FATFS() {}
- ~FATFS() {}
-
fat_BS_t m_bs;
bool m_readOnly;
u32int m_fatSize; //Size of one FAT, in sectors
@@ -101,10 +99,14 @@ class FATFS : public FileSystem {
u32int m_clusterSize; //size of a cluster in bytes
u32int m_fatType; //12, 16 or 32
Partition* m_part;
+ BlockCache<Partition> m_fatCache;
u32int nextCluster(u32int cluster); //Get the next cluster number in the chain (0 = EOF)
bool readCluster(u32int cluster, u8int* data); //Read the content of a cluster to a buffer
+ ~FATFS() {}
+ FATFS(Partition* p) : m_part(p), m_fatCache(p) {}
+
public:
static FileSystem* mount(Partition* p, DirectoryNode* mountpoint, bool readwrite = false);
diff --git a/Source/Kernel/VFS/BlockCache.class.cpp b/Source/Kernel/VFS/BlockCache.class.cpp
new file mode 100644
index 0000000..458faf6
--- /dev/null
+++ b/Source/Kernel/VFS/BlockCache.class.cpp
@@ -0,0 +1,89 @@
+#include <DeviceManager/Time.ns.h>
+
+template <typename T>
+BlockCache<T>::BlockCache(T* dev) {
+ m_dev = dev;
+ m_count = 0;
+}
+
+template <typename T>
+BlockCache<T>::~BlockCache() {
+ sync();
+ m_count = 0;
+ delete m_cache;
+ delete m_cacheInfo;
+}
+
+template <typename T>
+void BlockCache<T>::sync() {
+ for (u32int i = 0; i < m_count; i++) {
+ if (m_cacheInfo[i].dirty) m_dev->writeBlocks(m_cacheInfo[i].id, 1, m_cache + (i * m_dev->getBlockSize()));
+ }
+}
+
+template <typename T>
+void BlockCache<T>::init(u32int count) {
+ m_count = count;
+ m_cacheInfo = new cached_block_t[count];
+ for (u32int i = 0; i < m_count; i++) {
+ m_cacheInfo[i].id = 0;
+ m_cacheInfo[i].lastuse = 0;
+ m_cacheInfo[i].dirty = false;
+ }
+ m_cache = (u8int*)Mem::alloc(m_count * m_dev->getBlockSize());
+}
+
+template <typename T>
+bool BlockCache<T>::setCache(u64int block, u8int* data, bool dirty) {
+ u32int best = 0;
+ for (u32int i = 0; i < m_count; i++) {
+ if (m_cacheInfo[i].id == block) {
+ best = i;
+ break;
+ }
+ if (m_cacheInfo[i].lastuse < m_cacheInfo[best].lastuse) best = i;
+ }
+ if (best >= m_count) return false;
+ if (m_cacheInfo[best].dirty && (m_cacheInfo[best].id != block or !dirty))
+ m_dev->writeBlocks(m_cacheInfo[best].id, 1, m_cache + (best * m_dev->getBlockSize()));
+ m_cacheInfo[best].id = block;
+ m_cacheInfo[best].lastuse = Time::uptime();
+ m_cacheInfo[best].dirty = dirty;
+ memcpy(m_cache + (best * m_dev->getBlockSize()), data, m_dev->getBlockSize());
+ return true;
+}
+
+template <typename T>
+bool BlockCache<T>::getCache(u64int block, u8int* data) {
+ for (u32int i = 0; i < m_count; i++) {
+ if (m_cacheInfo[i].id == block && m_cacheInfo[i].lastuse != 0) {
+ m_cacheInfo[i].lastuse = Time::uptime();
+ memcpy(data, m_cache + (i * m_dev->getBlockSize()), m_dev->getBlockSize());
+ return true;
+ }
+ }
+ return false;
+}
+
+template <typename T>
+bool BlockCache<T>::readBlocks(u64int startblock, u32int count, u8int* data) {
+ if (count == 1) {
+ if (getCache(startblock, data)) return true;
+ if (!m_dev->readBlocks(startblock, count, data)) return false;
+ setCache(startblock, data);
+ return true;
+ } else {
+ return m_dev->readBlocks(startblock, count, data);
+ }
+}
+
+template <typename T>
+bool BlockCache<T>::writeBlocks(u64int startblock, u32int count, u8int* data) {
+ if (m_dev->readOnly()) return false;
+ if (count == 1) {
+ if (!setCache(startblock, data, true)) return m_dev->writeBlocks(startblock, count, data);
+ return true;
+ } else {
+ return m_dev->writeBlocks(startblock, count, data);
+ }
+}
diff --git a/Source/Kernel/VFS/BlockCache.class.h b/Source/Kernel/VFS/BlockCache.class.h
new file mode 100644
index 0000000..0b26180
--- /dev/null
+++ b/Source/Kernel/VFS/BlockCache.class.h
@@ -0,0 +1,32 @@
+#ifndef DEF_BLOCKCACHE_CLASS_H
+#define DEF_BLOCKCACHE_CLASS_H
+
+template <typename T>
+class BlockCache {
+ private:
+ T* m_dev;
+ u32int m_count;
+ struct cached_block_t {
+ u64int id;
+ u32int lastuse;
+ bool dirty;
+ } *m_cacheInfo;
+ u8int* m_cache;
+
+ void sync();
+ bool setCache(u64int block, u8int* data, bool dirty = false);
+ bool getCache(u64int block, u8int* data);
+
+ public:
+ BlockCache(T* dev);
+ ~BlockCache();
+ void init(u32int count);
+
+ bool readBlocks(u64int startblock, u32int count, u8int* data);
+ bool writeBlocks(u64int startblock, u32int count, u8int* data);
+
+};
+
+#include "BlockCache.class.cpp"
+
+#endif
diff --git a/Source/Kernel/VFS/Part.ns.cpp b/Source/Kernel/VFS/Part.ns.cpp
index 1bd6a8e..9ead6b5 100644
--- a/Source/Kernel/VFS/Part.ns.cpp
+++ b/Source/Kernel/VFS/Part.ns.cpp
@@ -57,7 +57,7 @@ u32int getDeviceID(BlockDevice* dev) {
}
BlockDevice* dev(String _class, u32int idx) {
- if (_class.empty()) _class = "block";
+ if (_class.empty()) return devices[idx];
for (u32int i = 0; i < devices.size(); i++) {
String devclass = devices[i]->getClass();
if (devclass == _class or (devclass.size() > _class.size() and devclass.substr(0, _class.size()) == _class)) {
diff --git a/Source/Kernel/VFS/Partition.class.cpp b/Source/Kernel/VFS/Partition.class.cpp
index b62f33c..1476b14 100644
--- a/Source/Kernel/VFS/Partition.class.cpp
+++ b/Source/Kernel/VFS/Partition.class.cpp
@@ -2,21 +2,23 @@
using namespace CMem; //For memcpy
-Partition::Partition(BlockDevice* dev, u8int partnumber, u64int startblock, u64int blockcount) {
+Partition::Partition(BlockDevice* dev, u8int partnumber, u64int startblock, u64int blockcount)
+: m_cache(dev) {
m_device = dev;
m_partnumber = partnumber;
m_startblock = startblock;
m_blockcount = blockcount;
+ m_cache.init(10 + (m_device->blocks() / 1000 > 100 ? 100 : m_device->blocks() / 1000));
}
bool Partition::readBlocks(u64int startblock, u32int count, u8int *data) {
if (startblock + count > m_startblock + m_blockcount) return false;
- return m_device->readBlocks(startblock - m_startblock, count, data);
+ return m_cache.readBlocks(startblock - m_startblock, count, data);
}
bool Partition::writeBlocks(u64int startblock, u32int count, u8int *data) {
if (startblock + count > m_startblock + m_blockcount) return false;
- return m_device->writeBlocks(startblock - m_startblock, count, data);
+ return m_cache.writeBlocks(startblock - m_startblock, count, data);
}
bool Partition::read(u64int start, u32int length, u8int *data) {
diff --git a/Source/Kernel/VFS/Partition.class.h b/Source/Kernel/VFS/Partition.class.h
index 8df1c4f..f511074 100644
--- a/Source/Kernel/VFS/Partition.class.h
+++ b/Source/Kernel/VFS/Partition.class.h
@@ -2,10 +2,12 @@
#define DEF_PARTITION_CLASS_H
#include <Devices/BlockDevice.proto.h>
+#include <VFS/BlockCache.class.h>
class Partition {
private:
BlockDevice* m_device;
+ BlockCache<BlockDevice> m_cache;
u64int m_startblock, m_blockcount;
u8int m_partnumber; //Partition number in partition table of device
diff --git a/Source/Kernel/VFS/VFS.ns.cpp b/Source/Kernel/VFS/VFS.ns.cpp
index 6a5fe4e..3b59c5a 100644
--- a/Source/Kernel/VFS/VFS.ns.cpp
+++ b/Source/Kernel/VFS/VFS.ns.cpp
@@ -90,7 +90,6 @@ bool mount(String str, VirtualTerminal* vt, multiboot_info_t *mbd) {
*vt << "Syntax: <mountpoint>:[<dev_class>]:<dev_id>:<part_id>[:<fs_type>[:[ro|rw]]]\n";
return false;
}
- if (fs[1] == "") fs[1] = "block";
if (fs.size() < 5) fs.push("");
if (fs.size() < 6) fs.push("ro"); //By default, mount file systems read-only
BlockDevice* d = Part::dev(fs[1], fs[2].toInt());
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 17:52:17 +0000