diff options
author | Robert Morris <[email protected]> | 2019-06-11 09:57:14 -0400 |
---|---|---|
committer | Robert Morris <[email protected]> | 2019-06-11 09:57:14 -0400 |
commit | 5753553213df8f9de851adb68377db43faecb91f (patch) | |
tree | 3b629ff54897fca414146677532cb459a2ed11ba /ramdisk.c | |
parent | 91ba81110acd3163f7de3580b677eece0c57f5e7 (diff) | |
download | xv6-labs-5753553213df8f9de851adb68377db43faecb91f.tar.gz xv6-labs-5753553213df8f9de851adb68377db43faecb91f.tar.bz2 xv6-labs-5753553213df8f9de851adb68377db43faecb91f.zip |
separate source into kernel/ user/ mkfs/
Diffstat (limited to 'ramdisk.c')
-rw-r--r-- | ramdisk.c | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/ramdisk.c b/ramdisk.c deleted file mode 100644 index 9901294..0000000 --- a/ramdisk.c +++ /dev/null @@ -1,45 +0,0 @@ -// -// ramdisk that uses the disk image loaded by qemu -rdinit fs.img -// - -#include "types.h" -#include "riscv.h" -#include "defs.h" -#include "param.h" -#include "memlayout.h" -#include "spinlock.h" -#include "sleeplock.h" -#include "fs.h" -#include "buf.h" - -void -ramdiskinit(void) -{ -} - -// If B_DIRTY is set, write buf to disk, clear B_DIRTY, set B_VALID. -// Else if B_VALID is not set, read buf from disk, set B_VALID. -void -ramdiskrw(struct buf *b) -{ - if(!holdingsleep(&b->lock)) - panic("ramdiskrw: buf not locked"); - if((b->flags & (B_VALID|B_DIRTY)) == B_VALID) - panic("ramdiskrw: nothing to do"); - - if(b->blockno >= FSSIZE) - panic("ramdiskrw: blockno too big"); - - uint64 diskaddr = b->blockno * BSIZE; - char *addr = (char *)RAMDISK + diskaddr; - - if(b->flags & B_DIRTY){ - // write - memmove(addr, b->data, BSIZE); - b->flags &= ~B_DIRTY; - } else { - // read - memmove(b->data, addr, BSIZE); - b->flags |= B_VALID; - } -} |