/* * linux/drivers/block/ide.c Version 3.15 May 5, 1995 * * Copyright (C) 1994, 1995 Linus Torvalds & authors (see below) */ /* * This is the dual IDE interface driver, as evolved from hd.c. * It supports up to two IDE interfaces, on one or two IRQs (usually 14 & 15). * There can be up to two drives per interface, as per the ATA-2 spec. * * Primary i/f: ide0: major=3; (hda) minor=0, (hdb) minor=64 * Secondary i/f: ide1: major=22; (hdc or hd1a) minor=0, (hdd or hd1b) minor=64 * * From hd.c: * | * | It traverses the request-list, using interrupts to jump between functions. * | As nearly all functions can be called within interrupts, we may not sleep. * | Special care is recommended. Have Fun! * | * | modified by Drew Eckhardt to check nr of hd's from the CMOS. * | * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug * | in the early extended-partition checks and added DM partitions. * | * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI). * | * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads", * | and general streamlining by Mark Lord (mlord@bnr.ca). * * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by: * * Mark Lord (mlord@bnr.ca) (IDE Perf.Pkg) * Delman Lee (delman@mipg.upenn.edu) ("Mr. atdisk2") * Petri Mattila (ptjmatti@kruuna.helsinki.fi) (EIDE stuff) * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom) * * This was a rewrite of just about everything from hd.c, though some original * code is still sprinkled about. Think of it as a major evolution, with * inspiration from lots of linux users, esp. hamish@zot.apana.org.au * * Version 1.0 ALPHA initial code, primary i/f working okay * Version 1.1 ALPHA fixes for dual i/f * Version 1.2 ALPHA first serious attempt at sharing irqs * Version 1.3 BETA dual i/f on shared irq tested & working! * Version 1.4 BETA added auto probing for irq(s) * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms, * fixed hd.c coexistence bug, other minor stuff * Version 1.6 BETA fix link error when cd-rom not configured * Version 2.0 BETA lots of minor fixes; remove annoying messages; ... * Version 2.2 BETA fixed reset_drives; major overhaul of autoprobing * Version 2.3 BETA set DEFAULT_UNMASK_INTR to 0 again; cosmetic changes * Version 2.4 BETA added debounce on reading of drive status reg, * added config flags to remove unwanted features * Version 2.5 BETA fixed problem with leftover phantom IRQ after probe, * allow "set_geometry" even when in LBA (as per spec(?)), * assorted miscellaneous tweaks. * Version 2.6 BETA more config flag stuff, another probing tweak, * (not released) multmode now defaults to status quo from boot time, * moved >16heads check to init time, rearranged reset code * added HDIO_DRIVE_CMD, removed standby/xfermode stuff * hopefully fixed ATAPI probing code, added hdx=cdrom * Version 2.7 BETA fixed invocation of cdrom_setup() * Version 2.8 BETA fixed compile error for DISK_RECOVERY_TIME>0 * fixed incorrect drive selection in DO_DRIVE_CMD (Bug!) * Version 2.9 BETA more work on ATAPI CDROM recognition * (not released) changed init order so partition checks go in sequence * Version 3.0 BETA included ide-cd.c update from Steve with Mitsumi fixes * attempt to fix byte-swap problem with Mitsumi id_info * ensure drives on second i/f get initialized on boot * preliminary compile-time support for 32bit IDE i/f chips * added check_region() and snarf_region() to probes * Version 3.1 BETA ensure drives on *both* i/f get initialized on boot * fix byte-swap problem with Mitsumi id_info * changed ide_timermask into ide_timerbit * get rid of unexpected interrupts after probing * don't wait for READY_STAT on cdrom drives * Version 3.2 BETA Ooops.. mistakenly left VLB_32BIT_IDE on by default * new ide-cd.c from Scott * Version 3.3 BETA fix compiling with PROBE_FOR_IRQS==0 * (sent to Linus) tweak in do_probe() to fix Delman's DRDY problem * Version 3.4 BETA removed "444" debug message * (sent to Linus) * Version 3.5 correct the bios_cyl field if it's too small * (linux 1.1.76) (to help fdisk with brain-dead BIOSs) * Version 3.6 cosmetic corrections to comments and stuff * (linux 1.1.77) reorganise probing code to make it understandable * added halfway retry to probing for drive identification * added "hdx=noprobe" command line option * allow setting multmode even when identification fails * Version 3.7 move set_geometry=1 from do_identify() to ide_init() * increase DRQ_WAIT to eliminate nuisance messages * wait for DRQ_STAT instead of DATA_READY during probing * (courtesy of Gary Thomas gary@efland.UU.NET) * Version 3.8 fixed byte-swapping for confused Mitsumi cdrom drives * update of ide-cd.c from Scott, allows blocksize=1024 * cdrom probe fixes, inspired by jprang@uni-duisburg.de * Version 3.9 don't use LBA if lba_capacity looks funny * correct the drive capacity calculations * fix probing for old Seagates without HD_ALTSTATUS * fix byte-ordering for some NEC cdrom drives * Version 3.10 disable multiple mode by default; was causing trouble * Version 3.11 fix mis-identification of old WD disks as cdroms * Version 3,12 simplify logic for selecting initial mult_count * (fixes problems with buggy WD drives) * Version 3.13 remove excess "multiple mode disabled" messages * Version 3.14 fix ide_error() handling of BUSY_STAT * fix byte-swapped cdrom strings (again.. arghh!) * ignore INDEX bit when checking the ALTSTATUS reg * Version 3.15 add SINGLE_THREADED flag for use with dual-CMD i/f * ignore WRERR_STAT for non-write operations * added VLB_32BIT_IO support for DC-2000A & others, * (incl. some Promise chips), courtesy of Frank Gockel * * To do: * - special 32-bit controller-type detection & support * - figure out how to support oddball "intelligent" caching cards * - reverse-engineer 3/4 drive support on fancy "Promise" cards */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /***************************************************************************** * IDE driver configuration options (play with these as desired): */ #define REALLY_SLOW_IO /* most systems can safely undef this */ #include #undef REALLY_FAST_IO /* define if ide ports are perfect */ #define INITIAL_MULT_COUNT 0 /* use zero to disable block mode */ #ifndef VLB_32BIT_IDE /* 0 for safety, 1 for 32-bit chipset */ #define VLB_32BIT_IDE 0 /* Winbond 83759F, OPTi 82C621 */ #endif #ifndef NEED_VLB_SYNC /* for VLB_32BIT_IDE on some chipsets */ #define NEED_VLB_SYNC 1 /* 0=simpler, 1=DC-2000A,PROMISE,... */ #endif #ifndef DISK_RECOVERY_TIME /* min. delay between IO for hardware */ #define DISK_RECOVERY_TIME 0 /* that needs it. */ #endif #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */ #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */ #endif #ifndef SUPPORT_TWO_INTERFACES /* 1 to support one/two interfaces */ #define SUPPORT_TWO_INTERFACES 1 /* 0 for a smaller, faster kernel */ #endif #ifndef OPTIMIZE_IRQS /* 1 for slightly faster code */ #define OPTIMIZE_IRQS 1 /* 0 to reduce kernel size */ #endif #ifndef SINGLE_THREADED /* 1 for dual CMD interfaces */ #define SINGLE_THREADED 0 /* 0 for concurrent i/f operation */ #endif #ifndef SUPPORT_SHARING_IRQ /* 1 to allow two IDE i/f on one IRQ */ #define SUPPORT_SHARING_IRQ 1 /* 0 to reduce kernel size */ #endif #ifndef FANCY_STATUS_DUMPS /* 1 for human-readable drive errors */ #define FANCY_STATUS_DUMPS 1 /* 0 to reduce kernel size */ #endif #define PROBE_FOR_IRQS 1 /* 0 to force use of defaults below */ #define DEFAULT_IDE0_IRQ 14 /* in case irq-probe fails */ #define DEFAULT_IDE1_IRQ 15 /* in case irq-probe fails */ /* IDE_DRIVE_CMD is used to implement many features of the hdparm utility */ #define IDE_DRIVE_CMD 99 /* (magic) undef to reduce kernel size*/ /* * "No user-serviceable parts" beyond this point :) ****************************************************************************** */ /* * Need to change these elsewhere in the kernel (someday) */ #ifndef IDE0_TIMER #define IDE0_TIMER HD_TIMER #define IDE1_TIMER HD_TIMER2 #endif /* * Ensure that various configuration flags have compatible settings */ #ifdef REALLY_SLOW_IO #undef REALLY_FAST_IO #endif #ifdef CONFIG_BLK_DEV_HD #undef SUPPORT_TWO_INTERFACES #define SUPPORT_TWO_INTERFACES 0 #endif /* CONFIG_BLK_DEV_HD */ #if SUPPORT_TWO_INTERFACES #define HWIF hwif #define DEV_HWIF (dev->hwif) #if SINGLE_THREADED #undef SUPPORT_SHARING_IRQ #define SUPPORT_SHARING_IRQ 1 #endif #else #undef SINGLE_THREADED #define SINGLE_THREADED 0 #undef OPTIMIZE_IRQS #define OPTIMIZE_IRQS 0 #undef SUPPORT_SHARING_IRQ #define SUPPORT_SHARING_IRQ 0 #ifdef CONFIG_BLK_DEV_HD #define HWIF 1 #else #define HWIF 0 #endif /* CONFIG_BLK_DEV_HD */ #define DEV_HWIF HWIF #endif /* SUPPORT_TWO_INTERFACES */ /* * Definitions for accessing IDE controller registers */ typedef unsigned char byte; /* used everywhere */ #define IDE_PORT(p,hwif) ((p)^((hwif)<<7)) /* IDE0: p^0x00 , IDE1: p^0x80 */ #ifdef REALLY_FAST_IO #define OUT_BYTE(b,p) outb((b),IDE_PORT(p,DEV_HWIF)) #define IN_BYTE(p,hwif) (byte)inb(IDE_PORT(p,hwif)) #else #define OUT_BYTE(b,p) outb_p((b),IDE_PORT(p,DEV_HWIF)) #define IN_BYTE(p,hwif) (byte)inb_p(IDE_PORT(p,hwif)) #endif /* REALLY_FAST_IO */ #if VLB_32BIT_IDE #define _OUT_SECTORS(b,n) outsl(IDE_PORT(HD_DATA,DEV_HWIF),(b),(n)<<7) #define _IN_SECTORS(b,n) insl(IDE_PORT(HD_DATA,DEV_HWIF),(b),(n)<<7) #if NEED_VLB_SYNC #define VLB_SYNC __asm__ __volatile__ ("pusha\n movl $0x01f2,%edx\n inb (%dx),%al\n inb (%dx),%al\n inb (%dx),%al\n popa\n") #define OUT_SECTORS(b,n) {cli(); VLB_SYNC; _OUT_SECTORS(b,n); if (dev->unmask) sti();} #define IN_SECTORS(b,n) {cli(); VLB_SYNC; _IN_SECTORS(b,n); if (dev->unmask) sti();} #else #define OUT_SECTORS(b,n) _OUT_SECTORS(b,n) #define IN_SECTORS(b,n) _IN_SECTORS(b,n) #endif /* NEED_VLB_SYNC */ #else #define OUT_SECTORS(b,n) outsw(IDE_PORT(HD_DATA,DEV_HWIF),(b),(n)<<8) #define IN_SECTORS(b,n) insw(IDE_PORT(HD_DATA,DEV_HWIF),(b),(n)<<8) #endif /* VLB_32BIT_IDE */ #define GET_ERR(hwif) IN_BYTE(HD_ERROR,hwif) #define GET_STAT(hwif) IN_BYTE(HD_STATUS,hwif) #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good)) #define BAD_R_STAT (BUSY_STAT | ERR_STAT) #define BAD_W_STAT (BUSY_STAT | ERR_STAT | WRERR_STAT) #define BAD_STAT (BAD_R_STAT | DRQ_STAT) #define DRIVE_READY (READY_STAT | SEEK_STAT) #define DATA_READY (DRIVE_READY | DRQ_STAT) /* * Some more useful definitions */ #define BIOS_SECTORS(dev) (dev->bios_head*dev->bios_sect*dev->bios_cyl) #define HD_NAME "hd" /* the same for both i/f; see also genhd.c */ #define PARTN_BITS 6 /* number of minor dev bits for partitions */ #define PARTN_MASK ((1< 0) static unsigned long ide_lastreq[] = {0,0}; /* completion time of last I/O */ #define SET_DISK_RECOVERY_TIMER ide_lastreq[DEV_HWIF] = read_timer(); static unsigned long read_timer(void) { unsigned long t, flags; int i; save_flags(flags); cli(); t = jiffies * 11932; outb_p(0, 0x43); i = inb_p(0x40); i |= inb(0x40) << 8; restore_flags(flags); return (t - i); } #else #define SET_DISK_RECOVERY_TIMER /* nothing */ #endif /* DISK_RECOVERY_TIME */ /* * The heart of the driver, referenced from lots of other routines: */ static void do_request (byte hwif); #define DO_REQUEST {SET_DISK_RECOVERY_TIMER do_request(DEV_HWIF);} /* * This is a macro rather than an inline to permit better gcc code. * Caller MUST do sti() before invoking WAIT_STAT() (for jiffies to work). * * This routine should get fixed to not hog the cpu during extra long waits.. * That could be done by busy-waiting for the first jiffy or two, and then * setting a timer to wake up at half second intervals thereafter, * until WAIT_WORSTCASE is achieved, before timing out. */ #define WAIT_STAT(dev,good,bad,timeout,msg,label) \ { \ byte stat; \ udelay(1); /* spec allows drive 400ns to assert "BUSY" */ \ if (GET_STAT(DEV_HWIF) & BUSY_STAT) { \ unsigned long timer = jiffies + timeout; \ do { \ if ((GET_STAT(DEV_HWIF) & BUSY_STAT) == 0) \ break; \ } while (timer > jiffies); \ } \ udelay(1); /* spec allows 400ns for status to stabilize */ \ if (!OK_STAT(stat=GET_STAT(DEV_HWIF), good, bad)) { \ ide_error(dev, msg " error", stat); \ goto label; \ } \ } /* * This should get invoked on every exit path from the driver. */ static inline void start_ide_timer (byte hwif) { if (ide_handler[HWIF] != NULL) { /* waiting for an irq? */ timer_table[ide_timer[HWIF]].expires = jiffies + WAIT_CMD; timer_active |= ide_timerbit[HWIF]; } } static void do_ide_reset (ide_dev_t *dev) { byte tmp; unsigned long timer, flags; save_flags(flags); sti(); for (tmp = 0; tmp < MAX_DRIVES; tmp++) { ide_dev_t *rdev = &ide_dev[DEV_HWIF][tmp]; rdev->special.b.set_geometry = 1; rdev->special.b.recalibrate = 1; rdev->special.b.set_multmode = 0; if (OK_TO_RESET_CONTROLLER) rdev->mult_count = 0; if (!rdev->keep_settings) { rdev->mult_req = 0; rdev->unmask = 0; } if (rdev->mult_req != rdev->mult_count) rdev->special.b.set_multmode = 1; } #if OK_TO_RESET_CONTROLLER cli(); OUT_BYTE(dev->ctl|6,HD_CMD); /* set nIEN, set SRST */ udelay(10); /* more than enough time */ OUT_BYTE(dev->ctl|2,HD_CMD); /* clear SRST */ udelay(10); /* more than enough time */ sti(); /* needed for jiffies */ for (timer = jiffies + WAIT_WORSTCASE; timer > jiffies;) { if ((GET_STAT(DEV_HWIF) & BUSY_STAT) == 0) break; } printk("%s: do_ide_reset: ", ide_name[DEV_HWIF]); /* ATAPI devices usually do *not* assert READY after a reset */ if (!OK_STAT(tmp=GET_STAT(DEV_HWIF), 0, BUSY_STAT)) { printk("timed-out, status=0x%02x\n", tmp); } else { if ((tmp = GET_ERR(DEV_HWIF)) == 1) printk("success\n"); else { printk("%s: ", ide_devname[DEV_HWIF][0]); switch (tmp & 0x7f) { case 1: printk("passed"); break; case 2: printk("formatter device error"); break; case 3: printk("sector buffer error"); break; case 4: printk("ECC circuitry error"); break; case 5: printk("controlling MPU error"); break; default:printk("error (0x%02x?)", tmp); } if (tmp & 0x80) printk("; %s: error", ide_devname[DEV_HWIF][1]); printk("\n"); } } #endif /* OK_TO_RESET_CONTROLLER */ restore_flags(flags); } /* * Clean up after success/failure of an explicit (ioctl) drive cmd */ static void end_drive_cmd (ide_dev_t *dev, byte stat, byte err) { unsigned long flags; struct request *rq = ide_cur_rq[DEV_HWIF]; byte *args = (byte *) rq->buffer; rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT); if (args) { args[0] = stat; args[1] = err; args[2] = IN_BYTE(HD_NSECTOR,DEV_HWIF); } save_flags(flags); cli(); up(rq->sem); ide_cur_rq[DEV_HWIF] = NULL; restore_flags(flags); } /* * Error reporting, in human readable form (luxurious, but a memory hog). */ static byte dump_status (byte hwif, const char *msg, byte stat) { unsigned long flags; byte err = 0; ide_dev_t *dev = ide_cur_dev[HWIF]; const char *name = dev ? dev->name : ide_name[HWIF]; save_flags (flags); sti(); printk("%s: %s: status=0x%02x", name, msg, stat); #if FANCY_STATUS_DUMPS if (dev && dev->type == disk) { printk(" { "); if (stat & BUSY_STAT) printk("Busy "); else { if (stat & READY_STAT) printk("DriveReady "); if (stat & WRERR_STAT) printk("WriteFault "); if (stat & SEEK_STAT) printk("SeekComplete "); if (stat & DRQ_STAT) printk("DataRequest "); if (stat & ECC_STAT) printk("CorrectedError "); if (stat & INDEX_STAT) printk("Index "); if (stat & ERR_STAT) printk("Error "); } printk("}"); } #endif /* FANCY_STATUS_DUMPS */ printk("\n"); if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) { err = GET_ERR(HWIF); printk("%s: %s: error=0x%02x", name, msg, err); #if FANCY_STATUS_DUMPS if (dev && dev->type == disk) { printk(" { "); if (err & BBD_ERR) printk("BadSector "); if (err & ECC_ERR) printk("UncorrectableError "); if (err & ID_ERR) printk("SectorIdNotFound "); if (err & ABRT_ERR) printk("DriveStatusError "); if (err & TRK0_ERR) printk("TrackZeroNotFound "); if (err & MARK_ERR) printk("AddrMarkNotFound "); printk("}"); if (err & (BBD_ERR|ECC_ERR|ID_ERR|MARK_ERR)) { byte cur = IN_BYTE(HD_CURRENT,HWIF); if (cur & 0x40) { /* using LBA? */ printk(", LBAsect=%ld", (unsigned long) ((cur&0xf)<<24) |(IN_BYTE(HD_HCYL,HWIF)<<16) |(IN_BYTE(HD_LCYL,HWIF)<<8) | IN_BYTE(HD_SECTOR,HWIF)); } else { printk(", CHS=%d/%d/%d", (IN_BYTE(HD_HCYL,HWIF)<<8) + IN_BYTE(HD_LCYL,HWIF), cur & 0xf, IN_BYTE(HD_SECTOR,HWIF)); } if (ide_cur_rq[HWIF]) printk(", sector=%ld", ide_cur_rq[HWIF]->sector); } } #endif /* FANCY_STATUS_DUMPS */ printk("\n"); } restore_flags (flags); return err; } /* * ide_error() takes action based on the error returned by the controller. */ #define ERROR_MAX 8 /* Max read/write errors per sector */ #define ERROR_RESET 3 /* Reset controller every 4th retry */ #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */ static void ide_error (ide_dev_t *dev, const char *msg, byte stat) { struct request *rq; byte err; err = dump_status(DEV_HWIF, msg, stat); if ((rq = ide_cur_rq[DEV_HWIF]) == NULL || dev == NULL) return; #ifdef IDE_DRIVE_CMD if (rq->cmd == IDE_DRIVE_CMD) { /* never retry an explicit DRIVE_CMD */ end_drive_cmd(dev, stat, err); return; } #endif /* IDE_DRIVE_CMD */ if (stat & BUSY_STAT) { /* other bits are useless when BUSY */ rq->errors |= ERROR_RESET; } else { if (dev->type == disk && (stat & ERR_STAT)) { /* err has different meaning on cdrom */ if (err & BBD_ERR) /* retries won't help this! */ rq->errors = ERROR_MAX; else if (err & TRK0_ERR) /* help it find track zero */ rq->errors |= ERROR_RECAL; } if ((stat & DRQ_STAT) && rq->cmd == READ) { int i = dev->mult_count ? dev->mult_count<<8 : 1<<8; while (i-- > 0) /* try to flush data */ (void) IN_BYTE(HD_DATA, dev->hwif); } } if (GET_STAT(dev->hwif) & (BUSY_STAT|DRQ_STAT)) rq->errors |= ERROR_RESET; /* Mmmm.. timing problem */ if (rq->errors >= ERROR_MAX) end_request(0, DEV_HWIF); else { if ((rq->errors & ERROR_RESET) == ERROR_RESET) do_ide_reset(dev); else if ((rq->errors & ERROR_RECAL) == ERROR_RECAL) dev->special.b.recalibrate = 1; ++rq->errors; } } static void read_intr (ide_dev_t *dev) { byte stat; int i; unsigned int msect, nsect; struct request *rq; if (!OK_STAT(stat=GET_STAT(DEV_HWIF),DATA_READY,BAD_R_STAT)) { sti(); ide_error(dev, "read_intr", stat); DO_REQUEST; return; } msect = dev->mult_count; read_next: rq = ide_cur_rq[DEV_HWIF]; if (msect) { if ((nsect = rq->current_nr_sectors) > msect) nsect = msect; msect -= nsect; } else nsect = 1; IN_SECTORS(rq->buffer,nsect); #ifdef DEBUG printk("%s: read: sectors(%ld-%ld), buffer=0x%08lx, remaining=%ld\n", dev->name, rq->sector, rq->sector+nsect-1, (unsigned long) rq->buffer+(nsect<<9), rq->nr_sectors-nsect); #endif rq->sector += nsect; rq->buffer += nsect<<9; rq->errors = 0; i = (rq->nr_sectors -= nsect); if ((rq->current_nr_sectors -= nsect) <= 0) end_request(1, DEV_HWIF); if (i > 0) { if (msect) goto read_next; ide_handler[DEV_HWIF] = &read_intr; return; } /* (void) GET_STAT(DEV_HWIF); */ /* hd.c did this */ DO_REQUEST; } static void write_intr (ide_dev_t *dev) { byte stat; int i; struct request *rq = ide_cur_rq[DEV_HWIF]; if (OK_STAT(stat=GET_STAT(DEV_HWIF),DRIVE_READY,BAD_W_STAT)) { #ifdef DEBUG printk("%s: write: sector %ld, buffer=0x%08lx, remaining=%ld\n", dev->name, rq->sector, (unsigned long) rq->buffer, rq->nr_sectors-1); #endif if ((rq->nr_sectors == 1) ^ ((stat & DRQ_STAT) != 0)) { rq->sector++; rq->buffer += 512; rq->errors = 0; i = --rq->nr_sectors; --rq->current_nr_sectors; if (rq->current_nr_sectors <= 0) end_request(1, DEV_HWIF); if (i > 0) { ide_handler[DEV_HWIF] = &write_intr; OUT_SECTORS(rq->buffer,1); return; } DO_REQUEST; return; } } sti(); ide_error(dev, "write_intr", stat); DO_REQUEST; } static void multwrite (ide_dev_t *dev) { struct request *rq = &ide_write_rq[DEV_HWIF]; unsigned int mcount = dev->mult_count; do { unsigned int nsect = rq->current_nr_sectors; if (nsect > mcount) nsect = mcount; mcount -= nsect; OUT_SECTORS(rq->buffer,nsect); #ifdef DEBUG printk("%s: multwrite: sector %ld, buffer=0x%08lx, count=%d, remaining=%ld\n", dev->name, rq->sector, (unsigned long) rq->buffer, nsect, rq->nr_sectors - nsect); #endif if ((rq->nr_sectors -= nsect) <= 0) break; if ((rq->current_nr_sectors -= nsect) == 0) { if ((rq->bh = rq->bh->b_reqnext) != NULL) { rq->current_nr_sectors = rq->bh->b_size>>9; rq->buffer = rq->bh->b_data; } else { panic("%s: buffer list corrupted\n", dev->name); break; } } else { rq->buffer += nsect << 9; } } while (mcount); } static void multwrite_intr (ide_dev_t *dev) { byte stat; int i; struct request *rq = &ide_write_rq[DEV_HWIF]; if (OK_STAT(stat=GET_STAT(DEV_HWIF),DRIVE_READY,BAD_W_STAT)) { if (stat & DRQ_STAT) { if (rq->nr_sectors) { if (dev->mult_count) multwrite(dev); ide_handler[DEV_HWIF] = &multwrite_intr; return; } } else { if (!rq->nr_sectors) { /* all done? */ rq = ide_cur_rq[DEV_HWIF]; for (i = rq->nr_sectors; i > 0;){ i -= rq->current_nr_sectors; end_request(1, DEV_HWIF); } DO_REQUEST; return; } } } sti(); ide_error(dev, "multwrite_intr", stat); DO_REQUEST; } /* * Issue a simple drive command * The drive must be selected beforehand. */ static inline void ide_cmd(ide_dev_t *dev, byte cmd, byte nsect, void (*handler)(ide_dev_t *dev)) { OUT_BYTE(dev->ctl,HD_CMD); OUT_BYTE(nsect,HD_NSECTOR); OUT_BYTE(cmd,HD_COMMAND); ide_handler[DEV_HWIF] = handler; } static void set_multmode_intr (ide_dev_t *dev) { byte stat = GET_STAT(DEV_HWIF); sti(); if (!OK_STAT(stat,READY_STAT,BAD_STAT)) { dev->mult_req = dev->mult_count = 0; dev->special.b.recalibrate = 1; (void) dump_status(DEV_HWIF, "set_multmode", stat); } else { if ((dev->mult_count = dev->mult_req)) printk (" %s: enabled %d-sector multiple mode\n", dev->name, dev->mult_count); else printk (" %s: disabled multiple mode\n", dev->name); } DO_REQUEST; } static void set_geometry_intr (ide_dev_t *dev) { byte stat = GET_STAT(DEV_HWIF); sti(); if (!OK_STAT(stat,READY_STAT,BAD_STAT)) ide_error(dev, "set_geometry_intr", stat); DO_REQUEST; } static void recal_intr (ide_dev_t *dev) { byte stat = GET_STAT(DEV_HWIF); sti(); if (!OK_STAT(stat,READY_STAT,BAD_STAT)) ide_error(dev, "recal_intr", stat); DO_REQUEST; } static void drive_cmd_intr (ide_dev_t *dev) { byte stat = GET_STAT(DEV_HWIF); sti(); if (!OK_STAT(stat,READY_STAT,BAD_STAT)) ide_error(dev, "drive_cmd", stat); /* calls end_drive_cmd() */ else end_drive_cmd (dev, stat, GET_ERR(DEV_HWIF)); DO_REQUEST; } static void timer_expiry (byte hwif) { unsigned long flags; save_flags(flags); cli(); if (ide_handler[HWIF] == NULL || (timer_active & ide_timerbit[HWIF])) { /* The drive must have responded just as the timer expired */ sti(); printk("%s: marginal timeout\n", ide_name[HWIF]); } else { ide_handler[HWIF] = NULL; disable_irq(ide_irq[HWIF]); #if SINGLE_THREADED if (single_threaded && ide_irq[HWIF] != ide_irq[HWIF^1]) disable_irq(ide_irq[HWIF^1]); #endif /* SINGLE_THREADED */ sti(); ide_error(ide_cur_dev[HWIF], "timeout", GET_STAT(HWIF)); do_request(HWIF); #if SUPPORT_SHARING_IRQ if (single_threaded) /* this line is indeed necessary */ hwif = current_hwif; #endif /* SUPPORT_SHARING_IRQ */ cli(); start_ide_timer(HWIF); enable_irq(ide_irq[HWIF]); #if SINGLE_THREADED if (single_threaded && ide_irq[HWIF] != ide_irq[HWIF^1]) enable_irq(ide_irq[HWIF^1]); #endif /* SINGLE_THREADED */ } restore_flags(flags); } static void ide0_timer_expiry (void) /* invoked from sched.c */ { timer_expiry (0); } static void ide1_timer_expiry (void) /* invoked from sched.c */ { timer_expiry (1); } static int do_special (ide_dev_t *dev) { special_t *s = &dev->special; #ifdef DEBUG printk("%s: do_special: 0x%02x\n", dev->name, s->all); #endif if (s->b.set_geometry) { s->b.set_geometry = 0; if (dev->type == disk) { OUT_BYTE(dev->sect,HD_SECTOR); OUT_BYTE(dev->cyl,HD_LCYL); OUT_BYTE(dev->cyl>>8,HD_HCYL); OUT_BYTE(((dev->head-1)|dev->select.all)&0xBF,HD_CURRENT); ide_cmd(dev, WIN_SPECIFY, dev->sect, &set_geometry_intr); } } else if (s->b.recalibrate) { s->b.recalibrate = 0; if (dev->type == disk) ide_cmd(dev,WIN_RESTORE,dev->sect,&recal_intr); } else if (s->b.set_multmode) { if (dev->type == disk) { if (dev->id && dev->mult_req > dev->id->max_multsect) dev->mult_req = dev->id->max_multsect; ide_cmd(dev,WIN_SETMULT,dev->mult_req,&set_multmode_intr); } else { dev->mult_req = 0; printk("%s: multmode not supported by this device\n", dev->name); } s->b.set_multmode = 0; } else { if (s->all) { printk("%s: bad special flag: 0x%02x\n", dev->name, s->all); s->all = 0; } } return (ide_handler[DEV_HWIF] == NULL) ? 1 : 0; } #ifdef CONFIG_BLK_DEV_IDECD static byte wait_stat (ide_dev_t *dev, byte good, byte bad, unsigned long timeout) { unsigned long flags; save_flags(flags); sti(); WAIT_STAT(dev, good, bad, timeout, "status", error); restore_flags(flags); return 0; error: restore_flags(flags); return 1; } #include "ide-cd.c" #endif /* CONFIG_BLK_DEV_IDECD */ static inline int do_rw_disk (ide_dev_t *dev, struct request *rq, unsigned long block) { OUT_BYTE(dev->ctl,HD_CMD); OUT_BYTE(rq->nr_sectors,HD_NSECTOR); if (dev->select.b.lba) { #ifdef DEBUG printk("%s: %sing: LBAsect=%ld, sectors=%ld, buffer=0x%08lx\n", dev->name, (rq->cmd==READ)?"read":"writ", block, rq->nr_sectors, (unsigned long) rq->buffer); #endif OUT_BYTE(block,HD_SECTOR); OUT_BYTE(block>>=8,HD_LCYL); OUT_BYTE(block>>=8,HD_HCYL); OUT_BYTE(((block>>8)&0x0f)|dev->select.all,HD_CURRENT); } else { unsigned int sect,head,cyl,track; track = block / dev->sect; sect = block % dev->sect + 1; OUT_BYTE(sect,HD_SECTOR); head = track % dev->head; cyl = track / dev->head; OUT_BYTE(cyl,HD_LCYL); OUT_BYTE(cyl>>8,HD_HCYL); OUT_BYTE(head|dev->select.all,HD_CURRENT); #ifdef DEBUG printk("%s: %sing: CHS=%d/%d/%d, sectors=%ld, buffer=0x%08lx\n", dev->name, (rq->cmd==READ)?"read":"writ", cyl, head, sect, rq->nr_sectors, (unsigned long) rq->buffer); #endif } if (rq->cmd == READ) { OUT_BYTE(dev->mult_count ? WIN_MULTREAD : WIN_READ, HD_COMMAND); ide_handler[DEV_HWIF] = &read_intr; return 0; } if (rq->cmd == WRITE) { OUT_BYTE(dev->wpcom,HD_PRECOMP); /* for ancient drives */ OUT_BYTE(dev->mult_count ? WIN_MULTWRITE : WIN_WRITE, HD_COMMAND); WAIT_STAT(dev, DATA_READY, BAD_W_STAT, WAIT_DRQ, "DRQ", error); if (!dev->unmask) cli(); if (dev->mult_count) { ide_write_rq[DEV_HWIF] = *rq; /* scratchpad */ multwrite(dev); ide_handler[DEV_HWIF] = &multwrite_intr; } else { OUT_SECTORS(rq->buffer,1); ide_handler[DEV_HWIF] = &write_intr; } return 0; } #ifdef IDE_DRIVE_CMD if (rq->cmd == IDE_DRIVE_CMD) { byte *args = rq->buffer; if (args) { OUT_BYTE(args[2],HD_FEATURE); ide_cmd(dev, args[0], args[1], &drive_cmd_intr); printk("%s: DRIVE_CMD cmd=0x%02x sc=0x%02x fr=0x%02x\n", dev->name, args[0], args[1], args[2]); return 0; } else { #ifdef DEBUG printk("%s: DRIVE_CMD (null)\n", dev->name); #endif end_drive_cmd(dev,GET_STAT(DEV_HWIF),GET_ERR(DEV_HWIF)); return 1; } } #endif /* IDE_DRIVE_CMD */ printk("%s: bad command: %d\n", dev->name, rq->cmd); end_request(0, DEV_HWIF); error: return 1; } /* * The driver enables interrupts as much as possible. In order to do this, * (a) the device-interrupt is always masked before entry, and * (b) the timeout-interrupt is always disabled before entry. * * Interrupts are still masked (by default) whenever we are exchanging * data/cmds with a drive, because some drives seem to have very poor * tolerance for latency during I/O. For devices which don't suffer from * this problem (most don't), the ide_dev[][].unmask flag can be set to permit * other interrupts during data/cmd transfers by using the "hdparm" utility. */ static void do_request (byte hwif) { unsigned int minor, drive; unsigned long block, blockend; struct request *rq; ide_dev_t *dev; repeat: sti(); #if SUPPORT_SHARING_IRQ current_hwif = hwif; /* used *only* when single_threaded==1 */ #endif /* SUPPORT_SHARING_IRQ */ if ((rq = ide_cur_rq[HWIF]) == NULL) { rq = blk_dev[ide_major[HWIF]].current_request; if ((rq == NULL) || (rq->dev < 0)) { #if SUPPORT_SHARING_IRQ if (single_threaded) { if (sharing_single_irq && (dev = ide_cur_dev[hwif])) /* disable irq */ OUT_BYTE(dev->ctl|2,HD_CMD); rq = blk_dev[ide_major[hwif^=1]].current_request; if ((rq != NULL) && (rq->dev >= 0)) goto repeat; } #endif /* SUPPORT_SHARING_IRQ */ return; } blk_dev[ide_major[HWIF]].current_request = rq->next; ide_cur_rq[HWIF] = rq; } #ifdef DEBUG printk("%s: do_request: current=0x%08lx\n",ide_name[HWIF],(unsigned long)rq); #endif minor = MINOR(rq->dev); drive = minor >> PARTN_BITS; ide_cur_dev[HWIF] = dev = &ide_dev[HWIF][drive]; if ((MAJOR(rq->dev) != ide_major[HWIF]) || (drive >= MAX_DRIVES)) { printk("%s: bad device number: 0x%04x\n", ide_name[HWIF], rq->dev); end_request(0, HWIF); goto repeat; } if (rq->bh && !rq->bh->b_lock) { printk("%s: block not locked\n", ide_name[HWIF]); end_request(0, HWIF); goto repeat; } block = rq->sector; blockend = block + rq->nr_sectors; if ((blockend < block) || (blockend > ide_hd[HWIF][minor].nr_sects)) { printk("%s: bad access: block=%ld, count=%ld\n", dev->name, block, rq->nr_sectors); end_request(0, HWIF); goto repeat; } block += ide_hd[HWIF][minor].start_sect; #if (DISK_RECOVERY_TIME > 0) while ((read_timer() - ide_lastreq[HWIF]) < DISK_RECOVERY_TIME); #endif OUT_BYTE(dev->select.all,HD_CURRENT); #ifdef CONFIG_BLK_DEV_IDECD WAIT_STAT(dev, (dev->type == cdrom) ? 0 : READY_STAT, BUSY_STAT|DRQ_STAT, WAIT_READY, "DRDY", repeat); #else WAIT_STAT(dev, READY_STAT, BUSY_STAT|DRQ_STAT, WAIT_READY, "DRDY", repeat); #endif /* CONFIG_BLK_DEV_IDECD */ if (!dev->special.all) { #ifdef CONFIG_BLK_DEV_IDECD if (dev->type == disk) { #endif /* CONFIG_BLK_DEV_IDECD */ if (do_rw_disk(dev, rq, block)) goto repeat; #ifdef CONFIG_BLK_DEV_IDECD } else { if (do_rw_cdrom(dev, block)) goto repeat; } #endif /* CONFIG_BLK_DEV_IDECD */ } else { if (do_special(dev)) goto repeat; } } /* * This is a macro rather than an inline function to * prevent gcc from over-optimizing accesses to current_hwif, * which may have a different value on exit from do_request(). */ #define DO_IDE_REQUEST(hwif) \ { \ if (ide_handler[hwif] == NULL) { \ disable_irq(ide_irq[hwif]); \ if (single_threaded && ide_irq[hwif] != ide_irq[hwif^1]) \ disable_irq(ide_irq[hwif^1]); \ do_request(hwif); \ cli(); \ start_ide_timer(hwif); \ enable_irq(ide_irq[hwif]); \ if (single_threaded && ide_irq[hwif] != ide_irq[hwif^1]) \ enable_irq(ide_irq[hwif^1]); \ } \ } #if SUPPORT_TWO_INTERFACES static void do_ide0_request (void) /* invoked with cli() */ { DO_IDE_REQUEST(0); } static void do_ide1_request (void) /* invoked with cli() */ { DO_IDE_REQUEST(1); } #else #define do_ide1_request do_ide0_request static void do_ide0_request (void) /* invoked with cli() */ { DO_IDE_REQUEST(HWIF); } #endif /* SUPPORT_TWO_INTERFACES */ #if SUPPORT_SHARING_IRQ static void do_shared_request (void) /* invoked with cli() */ { DO_IDE_REQUEST(current_hwif); } #endif /* SUPPORT_SHARING_IRQ */ /* * There's nothing really useful we can do with an unexpected interrupt, * other than reading the status register (to clear it), and logging it. * There should be no way that an irq can happen before we're ready for it, * so we needn't worry much about losing an "important" interrupt here. * * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the * drive enters "idle", "standby", or "sleep" mode, so if the status looks * "good", we just ignore the interrupt completely. */ static void unexpected_intr (byte hwif) { byte stat; if (!OK_STAT(stat=GET_STAT(HWIF), DRIVE_READY, BAD_STAT)) (void) dump_status(HWIF, "unexpected_intr", stat); #if SUPPORT_SHARING_IRQ if (single_threaded) { if (!OK_STAT(stat=GET_STAT(hwif^1), DRIVE_READY, BAD_STAT)) (void) dump_status(hwif^1, "unexpected_intr", stat); } #endif /* SUPPORT_SHARING_IRQ */ } /* * This is a macro rather than an inline function to * prevent gcc from over-optimizing accesses to current_hwif, * which may have a different value on exit from handler(). */ #define IDE_INTR(hwif) \ { \ ide_dev_t *dev; \ void (*handler)(ide_dev_t *); \ \ timer_active &= ~ide_timerbit[hwif]; \ if ((handler = ide_handler[hwif]) != NULL) { \ ide_handler[hwif] = NULL; \ dev = ide_cur_dev[hwif]; \ if (dev->unmask) \ sti(); \ handler(dev); \ } else \ unexpected_intr(hwif); \ cli(); \ } #if SINGLE_THREADED /* entry point for all interrupts when single_threaded==1 */ static void ide_seq_intr (int irq, struct pt_regs *regs) { byte hwif = (irq != ide_irq[0]); IDE_INTR(HWIF); start_ide_timer(current_hwif); } #endif /* SINGLE_THREADED */ #if OPTIMIZE_IRQS /* entry point for all interrupts on ide0 when single_threaded==0 */ static void ide0_intr (int irq, struct pt_regs *regs) { IDE_INTR(0); start_ide_timer(0); } /* entry point for all interrupts on ide1 when single_threaded==0 */ static void ide1_intr (int irq, struct pt_regs *regs) { IDE_INTR(1); start_ide_timer(1); } #else /* OPTIMIZE_IRQS */ #define ide0_intr ide_intr #define ide1_intr ide_intr /* entry point for all interrupts when single_threaded==0 */ static void ide_intr (int irq, struct pt_regs *regs) { #if SUPPORT_TWO_INTERFACES byte hwif = (irq != ide_irq[0]); #endif /* SUPPORT_TWO_INTERFACES */ IDE_INTR(HWIF); start_ide_timer(HWIF); } #endif /* OPTIMIZE_IRQS */ #if SUPPORT_SHARING_IRQ /* entry point for all interrupts on ide0/ide1 when sharing_single_irq==1 */ static void ide_shared_intr (int irq, struct pt_regs * regs) { IDE_INTR(current_hwif); start_ide_timer(current_hwif); } #endif /* SUPPORT_SHARING_IRQ */ static ide_dev_t *get_info_ptr (int i_rdev) { unsigned int drive = DEVICE_NR(i_rdev); ide_dev_t *dev; if (drive < MAX_DRIVES) { switch (MAJOR(i_rdev)) { case IDE0_MAJOR: dev = &ide_dev[0][drive]; if (dev->present) return dev; break; case IDE1_MAJOR: dev = &ide_dev[1][drive]; if (dev->present) return dev; break; } } return NULL; } static int ide_open(struct inode * inode, struct file * filp) { ide_dev_t *dev; unsigned long flags; if ((dev = get_info_ptr(inode->i_rdev)) == NULL) return -ENODEV; save_flags(flags); cli(); while (dev->busy) sleep_on(&dev->wqueue); dev->usage++; restore_flags(flags); #ifdef CONFIG_BLK_DEV_IDECD if (dev->type == cdrom) return cdrom_open (inode, filp, dev); #endif /* CONFIG_BLK_DEV_IDECD */ return 0; } /* * Releasing a block device means we sync() it, so that it can safely * be forgotten about... */ static void ide_release(struct inode * inode, struct file * file) { ide_dev_t *dev; if ((dev = get_info_ptr(inode->i_rdev)) != NULL) { sync_dev(inode->i_rdev); dev->usage--; #ifdef CONFIG_BLK_DEV_IDECD if (dev->type == cdrom) cdrom_release (inode, file, dev); #endif /* CONFIG_BLK_DEV_IDECD */ } } /* * This routine is called to flush all partitions and partition tables * for a changed disk, and then re-read the new partition table. * If we are revalidating a disk because of a media change, then we * enter with usage == 0. If we are using an ioctl, we automatically have * usage == 1 (we need an open channel to use an ioctl :-), so this * is our limit. */ static int revalidate_disk(int i_rdev) { unsigned int i, major, start, drive = DEVICE_NR(i_rdev); ide_dev_t *dev; struct gendisk *gd; long flags; if ((dev = get_info_ptr(i_rdev)) == NULL) return -ENODEV; save_flags(flags); cli(); if (dev->busy || (dev->usage > 1)) { restore_flags(flags); return -EBUSY; }; dev->busy = 1; restore_flags(flags); gd = &ide_gendisk[DEV_HWIF]; major = ide_major[DEV_HWIF] << 8; start = drive << PARTN_BITS; for (i = 0; i < (1<part[minor].start_sect = 0; gd->part[minor].nr_sects = 0; }; gd->part[start].nr_sects = ide_capacity[DEV_HWIF][drive]; resetup_one_dev(gd, drive); dev->busy = 0; wake_up(&dev->wqueue); return 0; } #ifdef IDE_DRIVE_CMD /* * This function issues a specific IDE drive command onto the * tail of the request queue, and waits for it to be completed. * If arg is NULL, it goes through all the motions, * but without actually sending a command to the drive. */ static int do_drive_cmd(int dev, char *args) { unsigned long flags; unsigned int major = MAJOR(dev); struct request rq, *cur_rq; struct blk_dev_struct *bdev; struct semaphore sem = MUTEX_LOCKED; /* build up a special request, and add it to the queue */ rq.buffer = args; rq.cmd = IDE_DRIVE_CMD; rq.errors = 0; rq.sector = 0; rq.nr_sectors = 0; rq.current_nr_sectors = 0; rq.sem = &sem; rq.bh = NULL; rq.bhtail = NULL; rq.next = NULL; rq.dev = dev; bdev = &blk_dev[major]; save_flags(flags); cli(); cur_rq = bdev->current_request; if (cur_rq == NULL) { /* empty request list? */ bdev->current_request = &rq; /* service ours immediately */ bdev->request_fn(); } else { while (cur_rq->next != NULL) /* find end of request list */ cur_rq = cur_rq->next; cur_rq->next = &rq; /* add rq to the end */ } down(&sem); /* wait for it to be serviced */ restore_flags(flags); return rq.errors ? -EIO : 0; /* return -EIO if errors */ } #endif /* IDE_DRIVE_CMD */ static int write_fs_long (unsigned long useraddr, long value) { int err; if (NULL == (long *)useraddr) return -EINVAL; if ((err = verify_area(VERIFY_WRITE, (long *)useraddr, sizeof(long)))) return err; put_fs_long((unsigned)value, (long *) useraddr); return 0; } static int ide_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { struct hd_geometry *loc = (struct hd_geometry *) arg; int err; ide_dev_t *dev; unsigned long flags; if (!inode || !inode->i_rdev) return -EINVAL; if ((dev = get_info_ptr(inode->i_rdev)) == NULL) return -ENODEV; switch (cmd) { case HDIO_GETGEO: if (!loc || dev->type != disk) return -EINVAL; err = verify_area(VERIFY_WRITE, loc, sizeof(*loc)); if (err) return err; put_fs_byte(dev->bios_head, (char *) &loc->heads); put_fs_byte(dev->bios_sect, (char *) &loc->sectors); put_fs_word(dev->bios_cyl, (short *) &loc->cylinders); put_fs_long((unsigned)ide_hd[DEV_HWIF][MINOR(inode->i_rdev)].start_sect, (long *) &loc->start); return 0; case BLKFLSBUF: if(!suser()) return -EACCES; fsync_dev(inode->i_rdev); invalidate_buffers(inode->i_rdev); return 0; case BLKRASET: if(!suser()) return -EACCES; if(arg > 0xff) return -EINVAL; read_ahead[MAJOR(inode->i_rdev)] = arg; return 0; case BLKRAGET: return write_fs_long(arg, read_ahead[MAJOR(inode->i_rdev)]); case BLKGETSIZE: /* Return device size */ return write_fs_long(arg, ide_hd[DEV_HWIF][MINOR(inode->i_rdev)].nr_sects); case BLKRRPART: /* Re-read partition tables */ return revalidate_disk(inode->i_rdev); case HDIO_GET_KEEPSETTINGS: return write_fs_long(arg, dev->keep_settings); case HDIO_GET_UNMASKINTR: return write_fs_long(arg, dev->unmask); case HDIO_GET_MULTCOUNT: return write_fs_long(arg, dev->mult_count); case HDIO_GET_IDENTITY: if (!arg || (MINOR(inode->i_rdev) & PARTN_MASK)) return -EINVAL; if (dev->id == NULL) return -ENOMSG; err = verify_area(VERIFY_WRITE, (char *)arg, sizeof(*dev->id)); if (err) return err; memcpy_tofs((char *)arg, (char *)dev->id, sizeof(*dev->id)); return 0; case HDIO_SET_KEEPSETTINGS: if (!suser()) return -EACCES; if ((arg > 1) || (MINOR(inode->i_rdev) & PARTN_MASK)) return -EINVAL; save_flags(flags); cli(); dev->keep_settings = arg; restore_flags(flags); return 0; case HDIO_SET_UNMASKINTR: if (!suser()) return -EACCES; if ((arg > 1) || (MINOR(inode->i_rdev) & PARTN_MASK)) return -EINVAL; save_flags(flags); cli(); dev->unmask = arg; restore_flags(flags); return 0; case HDIO_SET_MULTCOUNT: if (!suser()) return -EACCES; if (MINOR(inode->i_rdev) & PARTN_MASK) return -EINVAL; if ((dev->id != NULL) && (arg > dev->id->max_multsect)) return -EINVAL; save_flags(flags); cli(); if (dev->special.b.set_multmode) { restore_flags(flags); return -EBUSY; } dev->mult_req = arg; dev->special.b.set_multmode = 1; restore_flags(flags); #ifdef IDE_DRIVE_CMD do_drive_cmd (inode->i_rdev, NULL); return (dev->mult_count == arg) ? 0 : -EIO; #else return 0; #endif /* IDE_DRIVE_CMD */ #ifdef IDE_DRIVE_CMD case HDIO_DRIVE_CMD: { unsigned long args; if (NULL == (long *) arg) err = do_drive_cmd(inode->i_rdev,NULL); else { if (!(err = verify_area(VERIFY_WRITE,(long *)arg,sizeof(long)))) { args = get_fs_long((long *)arg); err = do_drive_cmd(inode->i_rdev,(char *)&args); put_fs_long(args,(long *)arg); } } return err; } #endif /* IDE_DRIVE_CMD */ RO_IOCTLS(inode->i_rdev, arg); default: #ifdef CONFIG_BLK_DEV_IDECD if (dev->type == cdrom) return ide_cdrom_ioctl(dev, inode, file, cmd, arg); #endif /* CONFIG_BLK_DEV_IDECD */ return -EPERM; } } #ifdef CONFIG_BLK_DEV_IDECD static int ide_check_media_change (dev_t full_dev) { ide_dev_t *dev; if ((dev = get_info_ptr(full_dev)) == NULL) return -ENODEV; if (dev->type != cdrom) return 0; return cdrom_check_media_change (dev); } #endif /* CONFIG_BLK_DEV_IDECD */ static void fixstring (byte *s, int bytecount, int byteswap) { byte *p, *end = &s[bytecount &= ~1]; /* bytecount must be even */ if (byteswap) { /* convert from big-endian to little-endian */ for (p = end ; p != s;) { unsigned short *pp = (unsigned short *) (p -= 2); *pp = (*pp >> 8) | (*pp << 8); } } p = s; /* strip leading blanks */ while (s != end && *s == ' ') ++s; /* compress internal blanks and strip trailing blanks */ while (s != end && *s) { if (*s++ != ' ' || (s != end && *s && *s != ' ')) *p++ = *(s-1); } /* wipe out trailing garbage */ while (p != end) *p++ = '\0'; } static int lba_capacity_is_ok (struct hd_driveid *id) /* * Returns: 1 if lba_capacity looks sensible * 0 otherwise */ { unsigned long lba_sects = id->lba_capacity; unsigned long chs_sects = id->cyls * id->heads * id->sectors; unsigned long _10_percent = chs_sects / 10; /* perform a rough sanity check on lba_sects: within 10% is "okay" */ if ((lba_sects - chs_sects) < _10_percent) return 1; /* lba_capacity is good */ /* some drives have the word order reversed */ lba_sects = (lba_sects << 16) | (lba_sects >> 16); if ((lba_sects - chs_sects) < _10_percent) { id->lba_capacity = lba_sects; /* fix it */ return 1; /* lba_capacity is (now) good */ } return 0; /* lba_capacity value is bad */ } static unsigned long probe_mem_start; /* used by drive/irq probing routines */ static void do_identify (ide_dev_t *dev, byte cmd) { int bswap; struct hd_driveid *id; unsigned long capacity, check; id = dev->id = (struct hd_driveid *) probe_mem_start; /* kmalloc() */ probe_mem_start += 512; IN_SECTORS(id,1); /* read 512 bytes of id info */ sti(); /* * WIN_IDENTIFY returns little-endian info, * WIN_PIDENTIFY *usually* returns little-endian info. */ bswap = 1; if (cmd == WIN_PIDENTIFY) { if ((id->model[0] == 'N' && id->model[1] == 'E') || (id->model[0] == 'F' && id->model[1] == 'X')) bswap = 0; /* NEC and *some* Mitsumi units */ } /* Vertos drives may still be weird */ fixstring (id->model, sizeof(id->model), bswap); fixstring (id->fw_rev, sizeof(id->fw_rev), bswap); fixstring (id->serial_no, sizeof(id->serial_no), bswap); /* * Check for an ATAPI device */ if (cmd == WIN_PIDENTIFY) { #ifdef CONFIG_BLK_DEV_IDECD byte type = (id->config >> 8) & 0x0f; #endif /* CONFIG_BLK_DEV_IDECD */ printk("%s: %s, ATAPI,", dev->name, id->model); #ifdef CONFIG_BLK_DEV_IDECD if (type == 0 || type == 5) printk(" CDROM drive\n"); else printk(" UNKNOWN device\n"); dev->type = cdrom; /* until we do it "correctly" above */ dev->present = 1; #else printk(unsupported); #endif /* CONFIG_BLK_DEV_IDECD */ return; } dev->type = disk; /* Extract geometry if we did not already have one for the drive */ if (!dev->present) { dev->present = 1; dev->cyl = dev->bios_cyl = id->cyls; dev->head = dev->bios_head = id->heads; dev->sect = dev->bios_sect = id->sectors; } /* Handle logical geometry translation by the drive */ if ((id->field_valid & 1) && id->cur_cyls && id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { /* * Extract the physical drive geometry for our use. * Note that we purposely do *not* update the bios info. * This way, programs that use it (like fdisk) will * still have the same logical view as the BIOS does, * which keeps the partition table from being screwed. * * An exception to this is the cylinder count, * which we reexamine later on to correct for 1024 limitations. */ dev->cyl = id->cur_cyls; dev->head = id->cur_heads; dev->sect = id->cur_sectors; capacity = dev->cyl * dev->head * dev->sect; /* check for word-swapped "capacity" field in id information */ check = (id->cur_capacity0 << 16) | id->cur_capacity1; if (check == capacity) /* was it swapped? */ *((int *)&id->cur_capacity0) = capacity; /* fix it */ } /* Use physical geometry if what we have still makes no sense */ if ((!dev->head || dev->head > 16) && id->heads && id->heads <= 16) { dev->cyl = id->cyls; dev->head = id->heads; dev->sect = id->sectors; } /* Correct the number of cyls if the bios value is too small */ if (dev->sect == dev->bios_sect && dev->head == dev->bios_head) { if (dev->cyl > dev->bios_cyl) dev->bios_cyl = dev->cyl; } /* Determine capacity, and use LBA if the drive properly supports it */ if ((id->capability & 2) && lba_capacity_is_ok(id)) { dev->select.b.lba = 1; capacity = id->lba_capacity; } else { capacity = dev->cyl * dev->head * dev->sect; } ide_capacity[DEV_HWIF][dev->select.b.drive] = capacity; printk ("%s: %.40s, %ldMB w/%dKB Cache, %sCHS=%d/%d/%d", dev->name, id->model, capacity/2048L, id->buf_size/2, dev->select.b.lba ? "LBA, " : "", dev->bios_cyl, dev->bios_head, dev->bios_sect); dev->mult_count = 0; if (id->max_multsect) { dev->mult_req = INITIAL_MULT_COUNT; if (dev->mult_req > id->max_multsect) dev->mult_req = id->max_multsect; if (dev->mult_req || ((id->multsect_valid & 1) && id->multsect)) dev->special.b.set_multmode = 1; printk(", MaxMult=%d", id->max_multsect); } printk("\n"); } static void delay_10ms (void) { unsigned long timer = jiffies + 2; while (timer > jiffies); } static int try_to_identify (ide_dev_t *dev, byte cmd) /* * Returns: 0 device was identified * 1 device timed-out (no response to identify request) * 2 device aborted the command (refused to identify itself) */ { int hd_status, rc; unsigned long timeout; #if PROBE_FOR_IRQS int irqs = 0; static byte irq_probed[2] = {0,0}; #endif /* PROBE_FOR_IRQS */ OUT_BYTE(dev->ctl|2,HD_CMD); /* disable device irq */ #if PROBE_FOR_IRQS if (!irq_probed[DEV_HWIF]) { /* already probed for IRQ? */ irqs = probe_irq_on(); /* start monitoring irqs */ OUT_BYTE(dev->ctl,HD_CMD); /* enable device irq */ } #endif /* PROBE_FOR_IRQS */ delay_10ms(); /* take a deep breath */ if ((IN_BYTE(HD_ALTSTATUS,DEV_HWIF) ^ IN_BYTE(HD_STATUS,DEV_HWIF)) & ~INDEX_STAT) { hd_status = HD_STATUS; /* an ancient Seagate drive */ printk("%s: probing with STATUS instead of ALTSTATUS\n", dev->name); } else hd_status = HD_ALTSTATUS; /* use non-intrusive polling */ OUT_BYTE(cmd,HD_COMMAND); /* ask drive for ID */ timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; timeout += jiffies; do { if (jiffies > timeout) { #if PROBE_FOR_IRQS if (!irq_probed[DEV_HWIF]) (void) probe_irq_off(irqs); #endif /* PROBE_FOR_IRQS */ return 1; /* drive timed-out */ } delay_10ms(); /* give drive a breather */ } while (IN_BYTE(hd_status,DEV_HWIF) & BUSY_STAT); delay_10ms(); /* wait for IRQ and DRQ_STAT */ if (OK_STAT(GET_STAT(DEV_HWIF),DRQ_STAT,BAD_R_STAT)) { cli(); /* some systems need this */ do_identify(dev, cmd); /* drive returned ID */ rc = 0; /* success */ } else rc = 2; /* drive refused ID */ #if PROBE_FOR_IRQS if (!irq_probed[DEV_HWIF]) { irqs = probe_irq_off(irqs); /* get irq number */ if (irqs > 0) { irq_probed[DEV_HWIF] = 1; ide_irq[DEV_HWIF] = irqs; } else /* Mmmm.. multiple IRQs */ printk("%s: IRQ probe failed (%d)\n", dev->name, irqs); } #endif /* PROBE_FOR_IRQS */ return rc; } /* * This routine has the difficult job of finding a drive if it exists, * without getting hung up if it doesn't exist, without trampling on * ethernet cards, and without leaving any IRQs dangling to haunt us later. * * If a drive is "known" to exist (from CMOS or kernel parameters), * but does not respond right away, the probe will "hang in there" * for the maximum wait time (about 30 seconds), otherwise it will * exit much more quickly. */ static int do_probe (ide_dev_t *dev, byte cmd) /* * Returns: 0 device was identified * 1 device timed-out (no response to identify request) * 2 device aborted the command (refused to identify itself) * 3 bad status from device (possible for ATAPI drives) * 4 probe was not attempted */ { int rc; #ifdef CONFIG_BLK_DEV_IDECD if (dev->present) { /* avoid waiting for inappropriate probes */ if ((dev->type == disk) ^ (cmd == WIN_IDENTIFY)) return 4; } #endif /* CONFIG_BLK_DEV_IDECD */ #if DEBUG printk("probing for %s: present=%d, type=%s, probetype=%s\n", dev->name, dev->present, dev->type ? "cdrom":"disk", (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); #endif OUT_BYTE(dev->select.all,HD_CURRENT); /* select target drive */ delay_10ms(); /* wait for BUSY_STAT */ if (IN_BYTE(HD_CURRENT,DEV_HWIF) != dev->select.all && !dev->present) { OUT_BYTE(0xa0,HD_CURRENT); /* exit with drive0 selected */ return 3; /* no i/f present: avoid killing ethernet cards */ } if (OK_STAT(GET_STAT(DEV_HWIF),READY_STAT,BUSY_STAT) || dev->present || cmd == WIN_PIDENTIFY) { if ((rc = try_to_identify(dev, cmd))) /* send cmd and wait */ rc = try_to_identify(dev, cmd); /* failed: try again */ if (rc == 1) printk("%s: no response (status = 0x%02x)\n", dev->name, GET_STAT(DEV_HWIF)); OUT_BYTE(dev->ctl|2,HD_CMD); /* disable device irq */ delay_10ms(); (void) GET_STAT(DEV_HWIF); /* ensure drive irq is clear */ } else { rc = 3; /* not present or maybe ATAPI */ } if (dev->select.b.drive == 1) { OUT_BYTE(0xa0,HD_CURRENT); /* exit with drive0 selected */ delay_10ms(); OUT_BYTE(dev->ctl|2,HD_CMD); /* disable device irq */ delay_10ms(); (void) GET_STAT(DEV_HWIF); /* ensure drive irq is clear */ } return rc; } static byte probe_for_drive (ide_dev_t *dev) /* * Returns: 0 no device was found * 1 device was found (note: dev->present might still be 0) */ { if (dev->dont_probe) /* skip probing? */ return dev->present; if (do_probe(dev, WIN_IDENTIFY) >= 2) { /* if !(success || timed-out) */ #ifdef CONFIG_BLK_DEV_IDECD (void) do_probe(dev, WIN_PIDENTIFY); /* look for ATAPI device */ #endif /* CONFIG_BLK_DEV_IDECD */ } if (!dev->present) return 0; /* drive not found */ if (dev->id == NULL) { /* identification failed? */ if (dev->type == disk) { printk ("%s: non-IDE device, CHS=%d/%d/%d\n", dev->name, dev->cyl, dev->head, dev->sect); } #ifdef CONFIG_BLK_DEV_IDECD else if (dev->type == cdrom) { printk("%s: ATAPI cdrom (?)\n", dev->name); } #endif /* CONFIG_BLK_DEV_IDECD */ else { dev->present = 0; /* nuke it */ return 1; /* drive was found */ } } #ifdef CONFIG_BLK_DEV_IDECD if (dev->type == cdrom) cdrom_setup(dev); #endif /* CONFIG_BLK_DEV_IDECD */ if (dev->type == disk && !dev->select.b.lba) { if (!dev->head || dev->head > 16) { printk("%s: cannot handle disk with %d physical heads\n", dev->name, dev->head); dev->present = 0; } } return 1; /* drive was found */ } static void probe_for_drives (byte hwif) { ide_dev_t *devs = &ide_dev[HWIF][0]; /* for convenience */ if (check_region(IDE_PORT(HD_DATA,HWIF),8) || check_region(IDE_PORT(HD_CMD,HWIF),1)) { if (devs[0].present || devs[1].present) printk("ERROR: "); printk("%s: port(s) already in use\n", ide_name[HWIF]); devs[0].present = 0; devs[1].present = 0; } else { unsigned long flags; save_flags(flags); sti(); /* needed for jiffies and irq probing */ /* second drive should only exist if first drive was found */ if (probe_for_drive(&devs[0]) || devs[1].present) (void) probe_for_drive(&devs[1]); #if PROBE_FOR_IRQS (void) probe_irq_off(probe_irq_on()); /* clear dangling irqs */ #endif /* PROBE_FOR_IRQS */ if (devs[0].present || devs[1].present) { request_region(IDE_PORT(HD_DATA,HWIF),8,ide_name[HWIF]); request_region(IDE_PORT(HD_CMD,HWIF),1,ide_name[HWIF]); } restore_flags(flags); } } static int next_drive = 0; /* used by the ide_setup() routines below */ void ide_setup(char *str, int *ints) { ide_dev_t *dev; const char *p[] = {"cyls","heads","sects","wpcom","irq"}; int i, hwif, drive = next_drive++; #ifdef CONFIG_BLK_DEV_HD extern void hd_setup(char *, int *); if (drive < 2) { hd_setup (str, ints); return; } #endif /* CONFIG_BLK_DEV_HD */ hwif = (drive > 1); printk("%s: ", ide_name[hwif]); if (drive > 3) { printk("too many drives defined\n"); return; } drive = drive & 1; printk("%s: ", ide_devname[hwif][drive]); if (!SUPPORT_TWO_INTERFACES && hwif != HWIF) { printk(unsupported); return; } dev = &ide_dev[hwif][drive]; if (dev->present) printk("(redefined) "); if (ints[0] == 0) { if (!strcmp(str,"noprobe")) { printk("noprobe\n"); dev->dont_probe = 1; /* don't probe for this drive */ return; } #ifdef CONFIG_BLK_DEV_IDECD if (!strcmp(str,"cdrom")) { printk("cdrom\n"); dev->present = 1; /* force autoprobe to find it */ dev->type = cdrom; return; } #endif /* CONFIG_BLK_DEV_IDECD */ } if (ints[0] < 3 || ints[0] > 5) { printk("bad parms, expected: cyls,heads,sects[,wpcom[,irq]]\n"); } else { for (i=0; i++ < ints[0];) printk("%s=%d%c",p[i-1],ints[i],itype = disk; dev->cyl = dev->bios_cyl = ints[1]; dev->head = dev->bios_head = ints[2]; dev->ctl = (ints[2] > 8 ? 8 : 0); dev->sect = dev->bios_sect = ints[3]; dev->wpcom = (ints[0] >= 4) ? ints[4] : 0; if (ints[0] >= 5) ide_irq[HWIF] = ints[5]; ide_capacity[HWIF][drive] = BIOS_SECTORS(dev); dev->present = 1; } } void hda_setup(char *str, int *ints) { next_drive = 0; ide_setup (str, ints); } void hdb_setup(char *str, int *ints) { next_drive = 1; ide_setup (str, ints); } void hdc_setup(char *str, int *ints) { next_drive = 2; ide_setup (str, ints); } void hdd_setup(char *str, int *ints) { next_drive = 3; ide_setup (str, ints); } #ifndef CONFIG_BLK_DEV_HD /* * We query CMOS about hard disks : it could be that we have a SCSI/ESDI/etc * controller that is BIOS compatible with ST-506, and thus showing up in our * BIOS table, but not register compatible, and therefore not present in CMOS. * * Furthermore, we will assume that our ST-506 drives are the primary * drives in the system -- the ones reflected as drive 1 or 2. The first * drive is stored in the high nibble of CMOS byte 0x12, the second in the low * nibble. This will be either a 4 bit drive type or 0xf indicating use byte * 0x19 for an 8 bit type, drive 1, 0x1a for drive 2 in CMOS. A non-zero value * means we have an AT controller hard disk for that drive. */ extern struct drive_info_struct drive_info; static void probe_cmos_for_drives (void) { byte drive, cmos_disks, *BIOS = (byte *) &drive_info; outb_p(0x12,0x70); /* specify CMOS address 0x12 */ cmos_disks = inb_p(0x71); /* read the data from 0x12 */ /* Extract drive geometry from CMOS+BIOS if not already setup */ for (drive = 0; drive < MAX_DRIVES; drive++) { ide_dev_t *dev = &ide_dev[0][drive]; if ((cmos_disks & (0xf0 >> (drive*4))) && !dev->present) { dev->cyl = dev->bios_cyl = *(unsigned short *)BIOS; dev->head = dev->bios_head = * (BIOS+2); dev->sect = dev->bios_sect = * (BIOS+14); dev->wpcom = (*(unsigned short *)(BIOS+5))>>2; dev->ctl = *(BIOS+8); dev->wpcom = 0; dev->type = disk; dev->present = 1; ide_capacity[0][drive] = BIOS_SECTORS(dev); } BIOS += 16; } } #endif /* CONFIG_BLK_DEV_HD */ static void init_ide_data (byte hwif) { int drive; for (drive = 0; drive < (MAX_DRIVES<select.all = (drive<<4)|0xa0; dev->hwif = hwif; dev->unmask = 0; dev->busy = 0; dev->mult_count = 0; /* set by do_identify() */ dev->mult_req = 0; /* set by do_identify() */ dev->usage = 0; dev->id = NULL; dev->ctl = 0x08; dev->wqueue = NULL; dev->special.all = 0; dev->special.b.recalibrate = 1; dev->special.b.set_geometry = 1; dev->keep_settings = 0; ide_hd[hwif][drive<name = ide_devname[hwif][drive]; } } /* * This is the harddisk IRQ description. The SA_INTERRUPT in sa_flags * means we enter the IRQ-handler with interrupts disabled: this is bad for * interrupt latency, but anything else has led to problems on some * machines. We enable interrupts as much as we can safely do in most places. */ static byte setup_irq (byte hwif) { static byte rc = 0; unsigned long flags; const char *msg = "", *primary_secondary[] = {"primary", "secondary"}; void (*handler)(int, struct pt_regs *) = HWIF ? &ide1_intr : &ide0_intr; #if SUPPORT_SHARING_IRQ if (sharing_single_irq) { if (HWIF != 0 && !rc) { /* IRQ already allocated? */ msg = " (shared with ide0)"; goto done; } handler = &ide_shared_intr; } #if SINGLE_THREADED else if (single_threaded) { handler = &ide_seq_intr; if (HWIF != 0) msg = " (single-threaded with ide0)"; } #endif /* SINGLE_THREADED */ #endif /* SUPPORT_SHARING_IRQ */ save_flags(flags); cli(); if ((rc = request_irq(ide_irq[HWIF],handler,SA_INTERRUPT,ide_name[HWIF]))) msg = ": FAILED! unable to allocate IRQ"; restore_flags(flags); #if SUPPORT_SHARING_IRQ done: #endif /* SUPPORT_SHARING_IRQ */ printk("%s: %s interface on irq %d%s\n", ide_name[HWIF], primary_secondary[HWIF], ide_irq[HWIF], msg); return rc; } static void ide_geninit(byte hwif) { static int drive; for (drive = 0; drive < MAX_DRIVES; drive++) { ide_dev_t *dev = &ide_dev[HWIF][drive]; if (dev->present) { ide_hd[HWIF][drive<type == cdrom) ide_hd[HWIF][drive< 0;) { if (ide_gendisk[hwif].nr_real != 0 && !setup_irq(hwif)) { const char *name = ide_name[HWIF]; unsigned int major = ide_major[HWIF]; if (register_blkdev(major, name, &ide_fops)) { printk("%s: unable to get major number %d\n", name, major); } else { timer_table[ide_timer[HWIF]].fn = HWIF ? ide1_timer_expiry : ide0_timer_expiry; #if SUPPORT_SHARING_IRQ if (single_threaded) blk_dev[major].request_fn = &do_shared_request; else #endif /* SUPPORT_SHARING_IRQ */ blk_dev[major].request_fn = HWIF ? &do_ide1_request : &do_ide0_request; read_ahead[major] = 8; /* (4kB) */ ide_gendisk[HWIF].next = gendisk_head; gendisk_head = &ide_gendisk[HWIF]; } } } return mem_start; } A much more important factor in the social movement than those already mentioned was the ever-increasing influence of women. This probably stood at the lowest point to which it has ever fallen, during the classic age of Greek life and thought. In the history of Thucydides, so far as it forms a connected series of events, four times only during a period of nearly seventy years does a woman cross the scene. In each instance her apparition only lasts for a moment. In three of the four instances she is a queen or a princess, and belongs either to the half-barbarous kingdoms of northern Hellas or to wholly barbarous Thrace. In the one remaining instance208¡ª that of the woman who helps some of the trapped Thebans to make their escape from Plataea¡ªwhile her deed of mercy will live for ever, her name is for ever lost.319 But no sooner did philosophy abandon physics for ethics and religion than the importance of those subjects to women was perceived, first by Socrates, and after him by Xenophon and Plato. Women are said to have attended Plato¡¯s lectures disguised as men. Women formed part of the circle which gathered round Epicurus in his suburban retreat. Others aspired not only to learn but to teach. Ar¨ºt¨º, the daughter of Aristippus, handed on the Cyrenaic doctrine to her son, the younger Aristippus. Hipparchia, the wife of Crates the Cynic, earned a place among the representatives of his school. But all these were exceptions; some of them belonged to the class of Hetaerae; and philosophy, although it might address itself to them, remained unaffected by their influence. The case was widely different in Rome, where women were far more highly honoured than in Greece;320 and even if the prominent part assigned to them in the legendary history of the city be a proof, among others, of its untrustworthiness, still that such stories should be thought worth inventing and preserving is an indirect proof of the extent to which feminine influence prevailed. With the loss of political liberty, their importance, as always happens at such a conjuncture, was considerably increased. Under a personal government there is far more scope for intrigue than where law is king; and as intriguers women are at least the209 equals of men. Moreover, they profited fully by the levelling tendencies of the age. One great service of the imperial jurisconsults was to remove some of the disabilities under which women formerly suffered. According to the old law, they were placed under male guardianship through their whole life, but this restraint was first reduced to a legal fiction by compelling the guardian to do what they wished, and at last it was entirely abolished. Their powers both of inheritance and bequest were extended; they frequently possessed immense wealth; and their wealth was sometimes expended for purposes of public munificence. Their social freedom seems to have been unlimited, and they formed combinations among themselves which probably served to increase their general influence.321 The old religions of Greece and Italy were essentially oracular. While inculcating the existence of supernatural beings, and prescribing the modes according to which such beings were to be worshipped, they paid most attention to the interpretation of the signs by which either future events in general, or the consequences of particular actions, were supposed to be divinely revealed. Of these intimations, some were given to the whole world, so that he who ran might read, others were reserved for certain favoured localities, and only communicated through the appointed ministers of the god. The Delphic oracle in particular enjoyed an enormous reputation both among Greeks and barbarians for guidance afforded under the latter conditions; and during a considerable period it may even be said to have directed the course of Hellenic civilisation. It was also under this form that supernatural religion suffered most injury from the great intellectual movement which followed the Persian wars. Men who had learned to study the constant sequences of Nature for themselves, and to shape their conduct according to fixed principles of prudence or of justice, either thought it irreverent to trouble the god about questions on which they were competent to form an opinion for themselves, or did not choose to place a well-considered scheme at the mercy of his possibly interested responses. That such a revolution occurred about the middle of the fifth century B.C., seems proved by the great change of tone in reference to this subject which one perceives on passing from Aeschylus to Sophocles. That anyone should question the veracity of an oracle is a supposition which never crosses the mind of the elder dramatist. A knowledge of augury counts among the greatest benefits222 conferred by Prometheus on mankind, and the Titan brings Zeus himself to terms by his acquaintance with the secrets of destiny. Sophocles, on the other hand, evidently has to deal with a sceptical generation, despising prophecies and needing to be warned of the fearful consequences brought about by neglecting their injunctions. The stranger had a pleasant, round face, with eyes that twinkled in spite of the creases around them that showed worry. No wonder he was worried, Sandy thought: having deserted the craft they had foiled in its attempt to get the gems, the man had returned from some short foray to discover his craft replaced by another. ¡°Thanks,¡± Dick retorted, without smiling. When they reached him, in the dying glow of the flashlight Dick trained on a body lying in a heap, they identified the man who had been warned by his gypsy fortune teller to ¡°look out for a hidden enemy.¡± He was lying at full length in the mould and leaves. "But that is sport," she answered carelessly. On the retirement of Townshend, Walpole reigned supreme and without a rival in the Cabinet. Henry Pelham was made Secretary at War; Compton Earl of Wilmington Privy Seal. He left foreign affairs chiefly to Stanhope, now Lord Harrington, and to the Duke of Newcastle, impressing on them by all means to avoid quarrels with foreign Powers, and maintain the blessings of peace. With all the faults of Walpole, this was the praise of his political system, which system, on the meeting of Parliament in the spring of 1731, was violently attacked by Wyndham and Pulteney, on the plea that we were making ruinous treaties, and sacrificing British interests, in order to benefit Hanover, the eternal millstone round the neck of England. Pulteney and Bolingbroke carried the same attack into the pages of The Craftsman, but they failed to move Walpole, or to shake his power. The English Government, instead of treating Wilkes with a dignified indifference, was weak enough to show how deeply it was touched by him, dismissed him from his commission of Colonel of the Buckinghamshire Militia, and treated Lord Temple as an abettor of his, by depriving him of the Lord-Lieutenancy of the same county, and striking his name from the list of Privy Councillors, giving the Lord-Lieutenancy to Dashwood, now Lord Le Despencer. "I tell you what I'll do," said the Deacon, after a little consideration. "I feel as if both Si and you kin stand a little more'n you had yesterday. I'll cook two to-day. We'll send a big cupful over to Capt. McGillicuddy. That'll leave us two for to-morrer. After that we'll have to trust to Providence." "Indeed you won't," said the Surgeon decisively. "You'll go straight home, and stay there until you are well. You won't be fit for duty for at least a month yet, if then. If you went out into camp now you would have a relapse, and be dead inside of a week. The country between here and Chattanooga is dotted with the graves of men who have been sent back to the front too soon." "Adone do wud that¡ªthough you sound more as if you wur in a black temper wud me than as if you pitied me." "Wot about this gal he's married?" "Don't come any further." "Davy, it 'ud be cruel of us to go and leave him." "Insolent priest!" interrupted De Boteler, "do you dare to justify what you have done? Now, by my faith, if you had with proper humility acknowledged your fault and sued for pardon¡ªpardon you should have had. But now, you leave this castle instantly. I will teach you that De Boteler will yet be master of his own house, and his own vassals. And here I swear (and the baron of Sudley uttered an imprecation) that, for your meddling knavery, no priest or monk shall ever again abide here. If the varlets want to shrieve, they can go to the Abbey; and if they want to hear mass, a priest can come from Winchcombe. But never shall another of your meddling fraternity abide at Sudley while Roland de Boteler is its lord." "My lord," said Edith, in her defence, "this woman has sworn falsely. The medicine I gave was a sovereign remedy, if given as I ordered. Ten drops would have saved the child's life; but the contents of the phial destroyed it. The words I uttered were prayers for the life of the child. My children, and all who know me, can bear witness that I have a custom of asking His blessing upon all I take in hand. I raised my eyes towards heaven, and muttered words; but, my lord, they were words of prayer¡ªand I looked up as I prayed, to the footstool of the Lord. But it is in vain to contend: the malice of the wicked will triumph, and Edith Holgrave, who even in thought never harmed one of God's creatures, must be sacrificed to cover the guilt, or hide the thoughtlessness of another." "Aye, Sir Treasurer, thou hast reason to sink thy head! Thy odious poll-tax has mingled vengeance¡ªnay, blood¡ªwith the cry of the bond." HoME¹ÅÒ»¼¶Ã«Æ¬Ãâ·Ñ¹Û¿´ ENTER NUMBET 0017
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