Mercurial > sarpn
diff arch/io.c @ 12:40af39d064fa
Refactor the arch code
Note: the code, as it is now, does not run even though it compiles
| author | Josef 'Jeff' Sipek <jeffpc@josefsipek.net> |
|---|---|
| date | Thu, 07 Apr 2011 22:07:20 -0400 |
| parents | 0451ffa1c3a0 |
| children | c75be274ce23 |
line wrap: on
line diff
--- a/arch/io.c Wed Apr 06 17:11:34 2011 -0400 +++ b/arch/io.c Thu Apr 07 22:07:20 2011 -0400 @@ -1,420 +1,12 @@ -/* - * Tables taken from Linux's arch/s390/kernel/ebcdic.c - */ - -/* - * ASCII (IBM PC 437) -> EBCDIC 037 - */ -static u8 ascii2ebcdic_table[256] = -{ - /*00 NUL SOH STX ETX EOT ENQ ACK BEL */ - 0x00, 0x01, 0x02, 0x03, 0x37, 0x2D, 0x2E, 0x2F, - /*08 BS HT LF VT FF CR SO SI */ - /* ->NL */ - 0x16, 0x05, 0x15, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, - /*10 DLE DC1 DC2 DC3 DC4 NAK SYN ETB */ - 0x10, 0x11, 0x12, 0x13, 0x3C, 0x3D, 0x32, 0x26, - /*18 CAN EM SUB ESC FS GS RS US */ - /* ->IGS ->IRS ->IUS */ - 0x18, 0x19, 0x3F, 0x27, 0x22, 0x1D, 0x1E, 0x1F, - /*20 SP ! " # $ % & ' */ - 0x40, 0x5A, 0x7F, 0x7B, 0x5B, 0x6C, 0x50, 0x7D, - /*28 ( ) * + , - . / */ - 0x4D, 0x5D, 0x5C, 0x4E, 0x6B, 0x60, 0x4B, 0x61, - /*30 0 1 2 3 4 5 6 7 */ - 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, - /*38 8 9 : ; < = > ? */ - 0xF8, 0xF9, 0x7A, 0x5E, 0x4C, 0x7E, 0x6E, 0x6F, - /*40 @ A B C D E F G */ - 0x7C, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, - /*48 H I J K L M N O */ - 0xC8, 0xC9, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, - /*50 P Q R S T U V W */ - 0xD7, 0xD8, 0xD9, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, - /*58 X Y Z [ \ ] ^ _ */ - 0xE7, 0xE8, 0xE9, 0xBA, 0xE0, 0xBB, 0xB0, 0x6D, - /*60 ` a b c d e f g */ - 0x79, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, - /*68 h i j k l m n o */ - 0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, - /*70 p q r s t u v w */ - 0x97, 0x98, 0x99, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, - /*78 x y z { | } ~ DL */ - 0xA7, 0xA8, 0xA9, 0xC0, 0x4F, 0xD0, 0xA1, 0x07, - /*80*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*88*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*90*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*98*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*A0*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*A8*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*B0*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*B8*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*C0*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*C8*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*D0*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*D8*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*E0 sz */ - 0x3F, 0x59, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*E8*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*F0*/ - 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, - /*F8*/ - 0x90, 0x3F, 0x3F, 0x3F, 0x3F, 0xEA, 0x3F, 0xFF -}; - -/* - * EBCDIC 037 -> ASCII (IBM PC 437) - */ -u8 ebcdic2ascii_table[256] = -{ - /* 0x00 NUL SOH STX ETX *SEL HT *RNL DEL */ - 0x00, 0x01, 0x02, 0x03, 0x07, 0x09, 0x07, 0x7F, - /* 0x08 -GE -SPS -RPT VT FF CR SO SI */ - 0x07, 0x07, 0x07, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, - /* 0x10 DLE DC1 DC2 DC3 -RES -NL BS -POC - -ENP ->LF */ - 0x10, 0x11, 0x12, 0x13, 0x07, 0x0A, 0x08, 0x07, - /* 0x18 CAN EM -UBS -CU1 -IFS -IGS -IRS -ITB - -IUS */ - 0x18, 0x19, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, - /* 0x20 -DS -SOS FS -WUS -BYP LF ETB ESC - -INP */ - 0x07, 0x07, 0x1C, 0x07, 0x07, 0x0A, 0x17, 0x1B, - /* 0x28 -SA -SFE -SM -CSP -MFA ENQ ACK BEL - -SW */ - 0x07, 0x07, 0x07, 0x07, 0x07, 0x05, 0x06, 0x07, - /* 0x30 ---- ---- SYN -IR -PP -TRN -NBS EOT */ - 0x07, 0x07, 0x16, 0x07, 0x07, 0x07, 0x07, 0x04, - /* 0x38 -SBS -IT -RFF -CU3 DC4 NAK ---- SUB */ - 0x07, 0x07, 0x07, 0x07, 0x14, 0x15, 0x07, 0x1A, - /* 0x40 SP RSP ä ---- */ - 0x20, 0xFF, 0x83, 0x84, 0x85, 0xA0, 0x07, 0x86, - /* 0x48 . < ( + | */ - 0x87, 0xA4, 0x9B, 0x2E, 0x3C, 0x28, 0x2B, 0x7C, - /* 0x50 & ---- */ - 0x26, 0x82, 0x88, 0x89, 0x8A, 0xA1, 0x8C, 0x07, - /* 0x58 ß ! $ * ) ; */ - 0x8D, 0xE1, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0xAA, - /* 0x60 - / ---- Ä ---- ---- ---- */ - 0x2D, 0x2F, 0x07, 0x8E, 0x07, 0x07, 0x07, 0x8F, - /* 0x68 ---- , % _ > ? */ - 0x80, 0xA5, 0x07, 0x2C, 0x25, 0x5F, 0x3E, 0x3F, - /* 0x70 ---- ---- ---- ---- ---- ---- ---- */ - 0x07, 0x90, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, - /* 0x78 * ` : # @ ' = " */ - 0x70, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22, - /* 0x80 * a b c d e f g */ - 0x07, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, - /* 0x88 h i ---- ---- ---- */ - 0x68, 0x69, 0xAE, 0xAF, 0x07, 0x07, 0x07, 0xF1, - /* 0x90 ° j k l m n o p */ - 0xF8, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, - /* 0x98 q r ---- ---- */ - 0x71, 0x72, 0xA6, 0xA7, 0x91, 0x07, 0x92, 0x07, - /* 0xA0 ~ s t u v w x */ - 0xE6, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, - /* 0xA8 y z ---- ---- ---- ---- */ - 0x79, 0x7A, 0xAD, 0xAB, 0x07, 0x07, 0x07, 0x07, - /* 0xB0 ^ ---- § ---- */ - 0x5E, 0x9C, 0x9D, 0xFA, 0x07, 0x07, 0x07, 0xAC, - /* 0xB8 ---- [ ] ---- ---- ---- ---- */ - 0xAB, 0x07, 0x5B, 0x5D, 0x07, 0x07, 0x07, 0x07, - /* 0xC0 { A B C D E F G */ - 0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, - /* 0xC8 H I ---- ö ---- */ - 0x48, 0x49, 0x07, 0x93, 0x94, 0x95, 0xA2, 0x07, - /* 0xD0 } J K L M N O P */ - 0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, - /* 0xD8 Q R ---- ü */ - 0x51, 0x52, 0x07, 0x96, 0x81, 0x97, 0xA3, 0x98, - /* 0xE0 \ S T U V W X */ - 0x5C, 0xF6, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, - /* 0xE8 Y Z ---- Ö ---- ---- ---- */ - 0x59, 0x5A, 0xFD, 0x07, 0x99, 0x07, 0x07, 0x07, - /* 0xF0 0 1 2 3 4 5 6 7 */ - 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, - /* 0xF8 8 9 ---- ---- Ü ---- ---- ---- */ - 0x38, 0x39, 0x07, 0x07, 0x9A, 0x07, 0x07, 0x07 -}; - -/* - * Generic translate buffer function. - */ -static inline void __translate(u8 *buf, int len, const u8 *table) -{ - asm volatile( - " sr %%r0,%%r0\n" /* test byte = 0 */ - " la %%r2,0(%0)\n" /* buffer */ - " lr %%r3,%2\n" /* length */ - " la %%r4,0(%1)\n" /* table */ - " tre %%r2,%%r4\n" - : /* output */ - : /* input */ - "a" (buf), - "a" (table), - "d" (len) - : /* clobbered */ - "cc", "r0", "r2", "r3", "r4" - ); -} - -#define ascii2ebcdic(buf, len) \ - __translate((buf), (len), ascii2ebcdic_table) -#define ebcdic2ascii(buf, len) \ - __translate((buf), (len), ebcdic2ascii_table) +#include "channel.h" +#include <die.h> /* console I/O functions */ -#define CON_LEN 132 -#define CON_DEV 0x0009 - -struct pmcw { - /* word 0 */ - u32 interrupt_param; /* Interruption Parameter */ - - /* word 1*/ - u8 __zero1:2, - isc:3, /* I/O-Interruption-Subclass Code */ - __zero2:3; - u8 e:1, /* Enabled */ - lm:2, /* Limit Mode */ - mm:2, /* Measurement-Mode Enable */ - d:1, /* Multipath Mode */ - t:1, /* Timing Facility */ - v:1; /* Device Number Valid */ - u16 dev_num; /* Device Number */ - - /* word 2 */ - u8 lpm; /* Logical-Path Mask */ - u8 pnom; /* Path-Not-Operational Mask */ - u8 lpum; /* Last-Path-Used Mask */ - u8 pim; /* Path-Installed Mask */ - - /* word 3 */ - u16 mbi; /* Measurement-Block Index */ - u8 pom; /* Path-Operational Mask */ - u8 pam; /* Path-Available Mask */ - - /* word 4 & 5 */ - u8 chpid[8]; /* Channel-Path Identifiers */ - - /* word 6 */ - u16 __zero3; - u16 __zero4:13, - f:1, /* Measurement Block Format Control */ - x:1, /* Extended Measurement Word Mode Enable */ - s:1; /* Concurrent Sense */ -}; - -struct scsw { - /* word 0 */ - u16 key:4, /* Subchannel key */ - s:1, /* Suspend control */ - l:1, /* ESW format */ - cc:2, /* Deferred condition code */ - f:1, /* Format */ - p:1, /* Prefetch */ - i:1, /* Initial-status interruption control */ - a:1, /* Address-limit-checking control */ - u:1, /* Supress-suspended interruption */ - z:1, /* Zero condition code */ - e:1, /* Extended control */ - n:1; /* Path no operational */ - u16 __zero:1, - fc:3, /* Function control */ - ac:7, /* Activity control */ - sc:5; /* Status control */ - - /* word 1 */ - u32 addr; /* CCW Address */ - - /* word 2 */ - u8 dev_status; /* Device status */ - u8 sch_status; /* Subchannel status */ - u16 count; /* Count */ -} __attribute__((packed)); - -struct schib { - struct pmcw pmcw; /* Path Management Control Word */ - struct scsw scsw; /* Subchannel Status Word */ - u32 measure_block_1; - u32 measure_block_2; - u32 model_dep_area; -} __attribute__((packed,aligned(4))); - -struct orb { - /* word 0 */ - u32 param; /* Interruption Parameter */ - - /* word 1 */ - u8 key:4, /* Subchannel Key */ - s:1, /* Suspend */ - c:1, /* Streaming-Mode Control */ - m:1, /* Modification Control */ - y:1; /* Synchronization Control */ - u8 f:1, /* Format Control */ - p:1, /* Prefetch Control */ - i:1, /* Initial-Status-Interruption Control */ - a:1, /* Address-Limit-Checking control */ - u:1, /* Suppress-Suspend-Interruption Control */ - __zero1:1, - h:1, /* Format-2-IDAW Control */ - t:1; /* 2K-IDAW Control */ - u8 lpm; /* Logical-Path Mask */ - u8 l:1, /* Incorrect-Length-Suppression Mode */ - d:1, /* Modified-CCW-Indirect-Data-Addressing Control */ - __zero2:5, - x:1; /* ORB-Extension Control */ - - /* word 2 */ - u32 addr; /* Channel-Program Address */ - - /* word 3 */ - u8 css_prio; /* Channel-Subsystem Priority */ - u8 __reserved1; - u8 cu_prio; /* Control-Unit Priority */ - u8 __reserved2; - - /* word 4 - 7 */ - u32 __reserved3; - u32 __reserved4; - u32 __reserved5; - u32 __reserved6; -} __attribute__((packed,aligned(4))); - -struct ccw { - u8 cmd; /* Command code */ - u8 flags; /* Flags */ - u16 count; /* Count */ - u32 addr; /* Data Address */ -} __attribute__((packed,aligned(8))); - -struct psw { - u8 _zero0:1, - r:1, /* PER Mask (R) */ - _zero1:3, - t:1, /* DAT Mode (T) */ - io:1, /* I/O Mask (IO) */ - ex:1; /* External Mask (EX) */ - - u8 key:4, /* Key */ - _zero2:1, - m:1, /* Machine-Check Mask (M) */ - w:1, /* Wait State (W) */ - p:1; /* Problem State (P) */ - - u8 as:2, /* Address-Space Control (AS) */ - cc:2, /* Condition Code (CC) */ - prog_mask:4; /* Program Mask */ - - u8 _zero3:7, - ea:1; /* Extended Addressing (EA) */ - - u32 ba:1, /* Basic Addressing (BA) */ - _zero4:31; - - u64 ptr; -}; - -struct irb { - struct scsw scsw; /* Subchannel-Status */ - u32 w0a, w1a, w2a, w3a, w4a; - u32 w0b, w1b, w2b, w3b, w4b, w5b, w6b, w7b; - u32 w0c, w1c, w2c, w3c, w4c, w5c, w6c, w7c; -} __attribute__((packed,aligned(4))); - -static int init_cons; -static u32 consch; - static struct irb irb; static struct orb orb; static struct ccw ccw; -static inline int store_sch(u32 sch, struct schib *schib) -{ - int cc; - - asm volatile( - "lr %%r1,%2\n" - "stsch %1\n" - "ipm %0\n" - "srl %0,28\n" - : /* output */ - "=d" (cc), - "=Q" (*schib) - : /* input */ - "d" (sch) - : /* clobbered */ - "cc", "r1", "memory" - ); - - return cc; -} - -static inline int modify_sch(u32 sch, struct schib *schib) -{ - int cc; - - asm volatile( - "lr %%r1,%1\n" - "msch 0(%2)\n" - "ipm %0\n" - "srl %0,28\n" - : /* output */ - "=d" (cc) - : /* input */ - "d" (sch), - "a" (schib) - : /* clobbered */ - "cc", "r1" - ); - - return cc; -} - -static inline int start_sch(u32 sch, struct orb *orb) -{ - int cc; - - asm volatile( - " lr %%r1,%1\n" - " ssch 0(%2)\n" - " ipm %0\n" - " srl %0,28\n" - : /* output */ - "=d" (cc) - : /* input */ - "d" (sch), - "a" (orb) - : /* clobbered */ - "cc", "r1" - ); - - return cc; -} - -#define die() do { \ - asm volatile( \ - "SR %r1, %r1 # not used, but should be zero\n" \ - "SR %r3, %r3 # CPU Address\n" \ - "SIGP %r1, %r3, 0x05 # Signal, order 0x05\n" \ - ); \ - for(;;); \ - } while(0) - u32 find_dev(int devnum) { struct schib schib; @@ -452,8 +44,6 @@ die(); // found it - init_cons = 1; - consch = sch; // set up the IO interrupt handler psw.ea = 1; @@ -494,249 +84,3 @@ __builtin_memcpy(((void*) 0x1f0), &psw, sizeof(struct psw)); } - -static inline void wait_for_io_int() -{ - struct psw psw; - - __builtin_memset(&psw, 0, sizeof(struct psw)); - psw.io = 1; - psw.ea = 1; - psw.ba = 1; - psw.w = 1; - - asm volatile( - " larl %%r1,0f\n" - " stg %%r1,%0\n" - " lpswe %1\n" - "0:\n" - : /* output */ - "=m" (psw.ptr) - : /* input */ - "m" (psw) - : /* clobbered */ - "r1", "r2" - ); -} - -int putline(char *buf, int len) -{ - char data[CON_LEN]; - - if (!init_cons) - enable_cons(CON_DEV); - - if ((len <= 0) || (len > CON_LEN)) - return -1; - - __builtin_memcpy(data, buf, len); - ascii2ebcdic((u8*) data, len); - - ccw.cmd = 0x01; - ccw.flags = 0; - ccw.count = len; - ccw.addr = (u32) (u64) data; - - __builtin_memset(&orb, 0, sizeof(struct orb)); - orb.lpm = 0xff; - orb.addr = (u32) (u64) &ccw; - orb.f = 1; - - if (start_sch(consch, &orb)) - die(); - - wait_for_io_int(); - - return len; -} - -int getline(char *buf, int len) -{ - int i; - - if (!init_cons) - enable_cons(CON_DEV); - - if ((len <= 0) || (len > CON_LEN)) - return -1; - - wait_for_io_int(); - - __builtin_memset(buf, 0, len); - ccw.cmd = 0x0a; - ccw.flags = 0x20; - ccw.count = len; - ccw.addr = (u32) (u64) buf; - - __builtin_memset(&orb, 0, sizeof(struct orb)); - orb.lpm = 0xff; - orb.addr = (u32) (u64) &ccw; - orb.f = 1; - - if (start_sch(consch, &orb)) - die(); - - wait_for_io_int(); - - for(i=0; i<len; i++) - if (!buf[i]) - break; - - if (i) - ebcdic2ascii((u8*) buf, i); - - return i; -} - -#define FBA_BLK_SIZE 512 - -#define DASD_FBA_WRITE 0x41 -#define DASD_FBA_READ 0x42 -#define DASD_FBA_LOCATE_RECORD 0x43 -#define DASD_FBA_DEFINE_EXTENT 0x63 - -enum op_type { - WRITE = 0, - READ, -}; - -struct fba_DE_data { - u8 perm:2, /* Permissions on this extent */ - __zero0:2, - da:1, - diag:1, /* allow diagnose */ - __zero1:2; - u8 __zero3; - u16 blksize; /* Blocksize */ - u32 ext_loc; /* Extent locator */ - u32 ext_beg; /* logical number of block 0 in extent */ - u32 ext_end; /* logocal number of last block in extent */ -}; - -struct fba_LO_data { - u8 zero:4, - cmd:4; - u8 aux; - u16 count; - u32 blkno; -}; - -/* build a Define-Extent CCW */ -static void fba_define_extent(struct ccw *ccw, struct fba_DE_data *data, - enum op_type rw, u16 blksize, u32 blkno, u32 len) -{ - ccw->cmd = DASD_FBA_DEFINE_EXTENT; - ccw->count = 0x10; - ccw->addr = (u32) (u64) data; - - __builtin_memset(data, 0, sizeof(struct fba_DE_data)); - switch(rw) { - case WRITE: - data->perm = 0x00; - break; - case READ: - data->perm = 0x01; - break; - default: - die(); - break; - } - data->blksize = blksize; - data->ext_loc = blkno; - data->ext_end = len - 1; -} - -/* build a Locate-Record CCW */ -static void fba_locate_record(struct ccw *ccw, struct fba_LO_data *data, - enum op_type rw, u32 blkno, u32 len) -{ - ccw->cmd = DASD_FBA_LOCATE_RECORD; - ccw->count = 0x08; - ccw->addr = (u32) (u64) data; - - __builtin_memset(data, 0, sizeof(struct fba_LO_data)); - switch(rw) { - case WRITE: - data->cmd = 0x05; - break; - case READ: - data->cmd = 0x06; - break; - default: - die(); - break; - } - data->blkno = blkno; - data->count = len; -} - -/* build a Read or Write CCW */ -static void fba_readwrite(struct ccw *ccw, void *ptr, enum op_type rw, u32 len) -{ - if(len > 0xffff) - die(); - - switch(rw) { - case 0: - ccw->cmd = DASD_FBA_WRITE; - break; - case 1: - ccw->cmd = DASD_FBA_READ; - break; - default: - die(); - break; - } - - ccw->count = len; - ccw->addr = (u32) (u64) ptr; -} - -/** - * fba_read_blk - read a block from an FBA device - * @dev: device to read from - * @blkno: block number to read - * @ptr: buffer to fill - * @sync: synchronous I/O - */ -static int __fba_readwrite_blk(u32 dev, u32 blkno, void *ptr, enum op_type dir) -{ - struct ccw ccw[3]; - struct fba_DE_data defext; - struct fba_LO_data locate; - - __builtin_memset(&orb, 0, sizeof(struct orb)); - orb.lpm = 0xff; - orb.addr = (u32) (u64) ccw; - orb.f = 1; - - __builtin_memset(ccw, 0, sizeof(ccw)); - - /* Define-Extent */ - fba_define_extent(&ccw[0], &defext, dir, FBA_BLK_SIZE, blkno, 1); - ccw[0].flags |= 0x40; - - /* Locate */ - fba_locate_record(&ccw[1], &locate, dir, 0, 1); - ccw[1].flags |= 0x40; - - /* Read */ - fba_readwrite(&ccw[2], ptr, dir, FBA_BLK_SIZE); - - if (start_sch(dev, &orb)) - die(); - - wait_for_io_int(); - - return 0; -} - -int fba_read_blk(u32 dev, u32 blkno, void *ptr) -{ - return __fba_readwrite_blk(dev, blkno, ptr, READ); -} - -int fba_write_blk(u32 dev, u32 blkno, void *ptr) -{ - return __fba_readwrite_blk(dev, blkno, ptr, WRITE); -}