Mercurial > hvf > hvf-old
annotate cp/drivers/console.c @ 618:535aec703236
cp: define a FIXME macro that leaves a sclp message
There are far too many fixmes in the code. Sadly, the compiler simply
discards them. This usually isn't an issue until one accidentally hits a
"weird" bug which just turns out to be an unhandled (but documented) case in
another part of the code. Using a macro instead of a comment will let the
compiler string-ify the text, and then at runtime use SCLP to print it out.
This will immediatelly point at problem areas. So, keep an eye on SCLP from
now on :)
Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
| author | Josef 'Jeff' Sipek <jeffpc@josefsipek.net> |
|---|---|
| date | Tue, 13 Dec 2011 22:20:50 -0500 |
| parents | 6b1f2cc66681 |
| children |
| rev | line source |
|---|---|
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1 /* |
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2 * (C) Copyright 2007-2011 Josef 'Jeff' Sipek <jeffpc@josefsipek.net> |
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3 * |
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4 * This file is released under the GPLv2. See the COPYING file for more |
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5 * details. |
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6 */ |
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7 |
| 415 | 8 #include <console.h> |
| 9 #include <slab.h> | |
| 10 #include <sched.h> | |
| 11 #include <directory.h> | |
| 12 #include <vsprintf.h> | |
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13 #include <spool.h> |
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14 #include <buddy.h> |
| 415 | 15 |
| 16 /* | |
| 17 * List of all consoles on the system | |
| 18 */ | |
| 19 static LIST_HEAD(consoles); | |
| 20 static spinlock_t consoles_lock = SPIN_LOCK_UNLOCKED; | |
| 21 | |
| 22 static void do_issue_read(struct console *con, struct io_op *ioop, struct ccw *ccws) | |
| 23 { | |
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24 int ret; |
| 415 | 25 |
| 26 atomic_dec(&con->dev->attention); | |
| 27 | |
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28 /* clear the buffer to allow strlen on the result */ |
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29 memset(con->bigbuf, 0, CONSOLE_LINE_LEN+1); |
| 415 | 30 |
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31 ccws[0].addr = ADDR31(con->bigbuf); |
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32 ccws[0].count = CONSOLE_LINE_LEN; |
| 415 | 33 ccws[0].cmd = 0x0a; |
| 34 ccws[0].flags = CCW_FLAG_SLI; | |
| 35 | |
| 36 memset(&ioop->orb, 0, sizeof(struct orb)); | |
| 37 ioop->orb.lpm = 0xff; | |
| 38 ioop->orb.addr = ADDR31(ccws); | |
| 39 ioop->orb.f = 1; | |
| 40 | |
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41 ioop->handler = NULL; |
| 415 | 42 ioop->dtor = NULL; |
| 43 | |
| 44 submit_io(con->dev, ioop, CAN_SLEEP); | |
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45 |
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46 ret = spool_append_rec(con->rlines, con->bigbuf, |
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47 strnlen((char*)con->bigbuf, CONSOLE_LINE_LEN)); |
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48 BUG_ON(ret); |
| 415 | 49 } |
| 50 | |
| 51 /** | |
| 52 * console_flusher - iterates over a console's buffers and initiates the IO | |
| 53 */ | |
| 54 static int console_flusher(void *data) | |
| 55 { | |
| 56 struct console *con = data; | |
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57 u8 *buf; |
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58 u16 len; |
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59 u16 left; |
| 415 | 60 |
| 61 /* needed for the IO */ | |
| 62 struct io_op ioop; | |
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63 struct ccw ccws[PAGE_SIZE/CONSOLE_LINE_LEN]; |
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64 int i; |
| 415 | 65 |
| 66 for(;;) { | |
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67 FIXME("this should be a sub-unless-zero"); |
| 415 | 68 if (atomic_read(&con->dev->attention)) |
| 69 do_issue_read(con, &ioop, ccws); | |
| 70 | |
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71 buf = con->bigbuf; |
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72 left = PAGE_SIZE; |
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73 |
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74 for(i=0; left >= CONSOLE_LINE_LEN; i++) { |
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75 len = CONSOLE_LINE_LEN; |
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76 if (spool_grab_rec(con->wlines, buf, &len)) |
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77 break; |
| 415 | 78 |
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79 ccws[i].addr = ADDR31(buf); |
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80 ccws[i].count = len; |
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81 ccws[i].cmd = 0x01; /* write */ |
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82 ccws[i].flags = CCW_FLAG_CC | CCW_FLAG_SLI; |
| 415 | 83 |
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84 left -= len; |
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85 buf += len; |
| 415 | 86 } |
| 87 | |
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88 if (!i) { |
| 415 | 89 schedule(); |
| 90 continue; | |
| 91 } | |
| 92 | |
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93 ccws[i-1].flags &= ~CCW_FLAG_CC; |
| 415 | 94 |
| 95 /* | |
| 96 * Now, set up the ORB and CCW | |
| 97 */ | |
| 98 memset(&ioop.orb, 0, sizeof(struct orb)); | |
| 99 ioop.orb.lpm = 0xff; | |
| 100 ioop.orb.addr = ADDR31(ccws); | |
| 101 ioop.orb.f = 1; /* format 1 CCW */ | |
| 102 | |
| 103 /* | |
| 104 * Set up the operation handler pointers, and start the IO | |
| 105 */ | |
| 106 ioop.handler = NULL; | |
| 107 ioop.dtor = NULL; | |
| 108 | |
| 109 submit_io(con->dev, &ioop, CAN_SLEEP); | |
| 110 } | |
| 111 | |
| 112 return 0; | |
| 113 } | |
| 114 | |
| 115 static void print_splash(struct console *con) | |
| 116 { | |
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117 struct logo_rec *rec; |
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118 struct logo *logo; |
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119 |
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120 list_for_each_entry(logo, &sysconf.logos, list) { |
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121 if (con->dev->type != logo->devtype) |
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122 continue; |
| 415 | 123 |
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124 FIXME("check the connection type"); |
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125 |
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126 list_for_each_entry(rec, &logo->lines, list) |
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127 con_printf(con, "%*.*s\n", CONFIG_LRECL, |
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128 CONFIG_LRECL, (char*) rec->data); |
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129 break; |
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130 } |
| 415 | 131 |
| 132 con_printf(con, "HVF VERSION " VERSION "\n\n"); | |
| 133 } | |
| 134 | |
| 135 struct console* start_oper_console(void) | |
| 136 { | |
| 137 struct device *dev; | |
| 138 | |
| 139 /* | |
| 140 * We only start the operator console | |
| 141 */ | |
| 142 | |
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143 dev = find_device_by_ccuu(sysconf.oper_con); |
| 415 | 144 BUG_ON(IS_ERR(dev)); |
| 145 | |
| 146 return console_enable(dev); | |
| 147 } | |
| 148 | |
| 149 void* console_enable(struct device *dev) | |
| 150 { | |
| 151 char name[TASK_NAME_LEN+1]; | |
| 152 struct console *con; | |
| 153 | |
| 154 con = find_console(dev); | |
| 155 if (!IS_ERR(con)) | |
| 156 return con; | |
| 157 | |
| 158 if (register_console(dev)) | |
| 159 return ERR_PTR(-ENOMEM); | |
| 160 | |
| 161 /* try again, this time, we should always find it! */ | |
| 162 con = find_console(dev); | |
| 163 if (IS_ERR(con)) | |
| 164 return con; | |
| 165 | |
| 166 atomic_inc(&con->dev->in_use); | |
| 167 | |
| 168 snprintf(name, TASK_NAME_LEN, "%05X-conflsh", con->dev->sch); | |
| 169 | |
| 170 create_task(name, console_flusher, con); | |
| 171 | |
| 172 print_splash(con); | |
| 173 | |
| 174 return con; | |
| 175 } | |
| 176 | |
| 177 int con_read_pending(struct console *con) | |
| 178 { | |
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179 return spool_nrecs(con->rlines); |
| 415 | 180 } |
| 181 | |
| 182 int con_read(struct console *con, u8 *buf, int size) | |
| 183 { | |
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184 u16 len = size; |
| 415 | 185 |
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186 if (spool_grab_rec(con->rlines, buf, &len)) |
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187 return -1; |
| 415 | 188 |
| 189 return len; | |
| 190 } | |
| 191 | |
| 192 int con_write(struct console *con, u8 *buf, int len) | |
| 193 { | |
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194 if (spool_append_rec(con->wlines, buf, len)) |
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195 return 0; |
| 415 | 196 |
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197 return len; |
| 415 | 198 } |
| 199 | |
| 200 void for_each_console(void (*f)(struct console *con)) | |
| 201 { | |
| 202 struct console *con; | |
| 203 | |
| 204 if (!f) | |
| 205 return; | |
| 206 | |
| 207 spin_lock(&consoles_lock); | |
| 208 list_for_each_entry(con, &consoles, consoles) | |
| 209 f(con); | |
| 210 spin_unlock(&consoles_lock); | |
| 211 } | |
| 212 | |
| 213 struct console* find_console(struct device *dev) | |
| 214 { | |
| 215 struct console *con; | |
| 216 | |
| 217 if (!dev) | |
| 218 return ERR_PTR(-ENOENT); | |
| 219 | |
| 220 spin_lock(&consoles_lock); | |
| 221 list_for_each_entry(con, &consoles, consoles) { | |
| 222 if (con->dev == dev) | |
| 223 goto found; | |
| 224 } | |
| 225 con = ERR_PTR(-ENOENT); | |
| 226 found: | |
| 227 spin_unlock(&consoles_lock); | |
| 228 return con; | |
| 229 } |