diff options
Diffstat (limited to 'os/boot/rpcg/squeeze.h')
| -rw-r--r-- | os/boot/rpcg/squeeze.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/os/boot/rpcg/squeeze.h b/os/boot/rpcg/squeeze.h new file mode 100644 index 00000000..b06c1b79 --- /dev/null +++ b/os/boot/rpcg/squeeze.h @@ -0,0 +1,34 @@ + +/* + * squeezed file format: + * Sqhdr + * original Exec header + * two Squeeze tables + * squeezed segment + * unsqueezed segment, if any + */ +#define SQMAGIC (ulong)0xFEEF0F1E + +typedef struct Sqhdr Sqhdr; +struct Sqhdr { + uchar magic[4]; /* SQMAGIC */ + uchar text[4]; /* squeezed length of text (excluding tables) */ + uchar data[4]; /* squeezed length of data (excluding tables) */ + uchar asis[4]; /* length of unsqueezed segment */ + uchar toptxt[4]; /* value for 0 encoding in text */ + uchar topdat[4]; /* value for 0 encoding in data */ + uchar sum[4]; /* simple checksum of unsqueezed data */ + uchar flags[4]; +}; +#define SQHDRLEN (8*4) + +/* + * certain power instruction types are rearranged by sqz + * so as to move the variable part of the instruction word to the + * low order bits. note that the mapping is its own inverse. + */ +#define QREMAP(X)\ + switch((X)>>26){\ + case 19: case 31: case 59: case 63:\ + (X) = (((X) & 0xFC00F801) | (((X)>>15)&0x7FE) | (((X)&0x7FE)<<15));\ + } |