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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / ppc / platforms / hdpu.c
blobb659d7b3d7477a8e9c520eac236b785a32637142
1
2 /*
3 * arch/ppc/platforms/hdpu_setup.c
4 *
5 * Board setup routines for the Sky Computers HDPU Compute Blade.
6 *
7 * Written by Brian Waite <waite@skycomputers.com>
8 *
9 * Based on code done by - Mark A. Greer <mgreer@mvista.com>
10 * Rabeeh Khoury - rabeeh@galileo.co.il
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 */
17
18 #include <linux/config.h>
19
20 #include <linux/pci.h>
21 #include <linux/delay.h>
22 #include <linux/irq.h>
23 #include <linux/ide.h>
24 #include <linux/seq_file.h>
25
26 #include <linux/initrd.h>
27 #include <linux/root_dev.h>
28 #include <linux/smp.h>
29
30 #include <asm/time.h>
31 #include <asm/machdep.h>
32 #include <asm/todc.h>
33 #include <asm/mv64x60.h>
34 #include <asm/ppcboot.h>
35 #include <platforms/hdpu.h>
36 #include <linux/mv643xx.h>
37 #include <linux/hdpu_features.h>
38 #include <linux/device.h>
39 #include <linux/mtd/physmap.h>
40
41 #define BOARD_VENDOR "Sky Computers"
42 #define BOARD_MACHINE "HDPU-CB-A"
43
44 bd_t ppcboot_bd;
45 int ppcboot_bd_valid = 0;
46
47 static mv64x60_handle_t bh;
48
49 extern char cmd_line[];
50
51 unsigned long hdpu_find_end_of_memory(void);
52 void hdpu_mpsc_progress(char *s, unsigned short hex);
53 void hdpu_heartbeat(void);
54
55 static void parse_bootinfo(unsigned long r3,
56 unsigned long r4, unsigned long r5,
57 unsigned long r6, unsigned long r7);
58 static void hdpu_set_l1pe(void);
59 static void hdpu_cpustate_set(unsigned char new_state);
60 #ifdef CONFIG_SMP
61 static spinlock_t timebase_lock = SPIN_LOCK_UNLOCKED;
62 static unsigned int timebase_upper = 0, timebase_lower = 0;
63 extern int smp_tb_synchronized;
64
65 void __devinit hdpu_tben_give(void);
66 void __devinit hdpu_tben_take(void);
67 #endif
68
69 static int __init
70 hdpu_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
71 {
72 struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
73
74 if (hose->index == 0) {
75 static char pci_irq_table[][4] = {
76 {HDPU_PCI_0_IRQ, 0, 0, 0},
77 {HDPU_PCI_0_IRQ, 0, 0, 0},
78 };
79
80 const long min_idsel = 1, max_idsel = 2, irqs_per_slot = 4;
81 return PCI_IRQ_TABLE_LOOKUP;
82 } else {
83 static char pci_irq_table[][4] = {
84 {HDPU_PCI_1_IRQ, 0, 0, 0},
85 };
86
87 const long min_idsel = 1, max_idsel = 1, irqs_per_slot = 4;
88 return PCI_IRQ_TABLE_LOOKUP;
89 }
90 }
91
92 static void __init hdpu_intr_setup(void)
93 {
94 mv64x60_write(&bh, MV64x60_GPP_IO_CNTL,
95 (1 | (1 << 2) | (1 << 3) | (1 << 4) | (1 << 5) |
96 (1 << 6) | (1 << 7) | (1 << 12) | (1 << 16) |
97 (1 << 18) | (1 << 19) | (1 << 20) | (1 << 21) |
98 (1 << 22) | (1 << 23) | (1 << 24) | (1 << 25) |
99 (1 << 26) | (1 << 27) | (1 << 28) | (1 << 29)));
100
101 /* XXXX Erranum FEr PCI-#8 */
102 mv64x60_clr_bits(&bh, MV64x60_PCI0_CMD, (1 << 5) | (1 << 9));
103 mv64x60_clr_bits(&bh, MV64x60_PCI1_CMD, (1 << 5) | (1 << 9));
104
105 /*
106 * Dismiss and then enable interrupt on GPP interrupt cause
107 * for CPU #0
108 */
109 mv64x60_write(&bh, MV64x60_GPP_INTR_CAUSE, ~((1 << 8) | (1 << 13)));
110 mv64x60_set_bits(&bh, MV64x60_GPP_INTR_MASK, (1 << 8) | (1 << 13));
111
112 /*
113 * Dismiss and then enable interrupt on CPU #0 high cause reg
114 * BIT25 summarizes GPP interrupts 8-15
115 */
116 mv64x60_set_bits(&bh, MV64360_IC_CPU0_INTR_MASK_HI, (1 << 25));
117 }
118
119 static void __init hdpu_setup_peripherals(void)
120 {
121 unsigned int val;
122
123 mv64x60_set_32bit_window(&bh, MV64x60_CPU2BOOT_WIN,
124 HDPU_EMB_FLASH_BASE, HDPU_EMB_FLASH_SIZE, 0);
125 bh.ci->enable_window_32bit(&bh, MV64x60_CPU2BOOT_WIN);
126
127 mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_0_WIN,
128 HDPU_TBEN_BASE, HDPU_TBEN_SIZE, 0);
129 bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_0_WIN);
130
131 mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_1_WIN,
132 HDPU_NEXUS_ID_BASE, HDPU_NEXUS_ID_SIZE, 0);
133 bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_1_WIN);
134
135 mv64x60_set_32bit_window(&bh, MV64x60_CPU2SRAM_WIN,
136 HDPU_INTERNAL_SRAM_BASE,
137 HDPU_INTERNAL_SRAM_SIZE, 0);
138 bh.ci->enable_window_32bit(&bh, MV64x60_CPU2SRAM_WIN);
139
140 bh.ci->disable_window_32bit(&bh, MV64x60_ENET2MEM_4_WIN);
141 mv64x60_set_32bit_window(&bh, MV64x60_ENET2MEM_4_WIN, 0, 0, 0);
142
143 mv64x60_clr_bits(&bh, MV64x60_PCI0_PCI_DECODE_CNTL, (1 << 3));
144 mv64x60_clr_bits(&bh, MV64x60_PCI1_PCI_DECODE_CNTL, (1 << 3));
145 mv64x60_clr_bits(&bh, MV64x60_TIMR_CNTR_0_3_CNTL,
146 ((1 << 0) | (1 << 8) | (1 << 16) | (1 << 24)));
147
148 /* Enable pipelining */
149 mv64x60_set_bits(&bh, MV64x60_CPU_CONFIG, (1 << 13));
150 /* Enable Snoop Pipelineing */
151 mv64x60_set_bits(&bh, MV64360_D_UNIT_CONTROL_HIGH, (1 << 24));
152
153 /*
154 * Change DRAM read buffer assignment.
155 * Assign read buffer 0 dedicated only for CPU,
156 * and the rest read buffer 1.
157 */
158 val = mv64x60_read(&bh, MV64360_SDRAM_CONFIG);
159 val = val & 0x03ffffff;
160 val = val | 0xf8000000;
161 mv64x60_write(&bh, MV64360_SDRAM_CONFIG, val);
162
163 /*
164 * Configure internal SRAM -
165 * Cache coherent write back, if CONFIG_MV64360_SRAM_CACHE_COHERENT set
166 * Parity enabled.
167 * Parity error propagation
168 * Arbitration not parked for CPU only
169 * Other bits are reserved.
170 */
171 #ifdef CONFIG_MV64360_SRAM_CACHE_COHERENT
172 mv64x60_write(&bh, MV64360_SRAM_CONFIG, 0x001600b2);
173 #else
174 mv64x60_write(&bh, MV64360_SRAM_CONFIG, 0x001600b0);
175 #endif
176
177 hdpu_intr_setup();
178 }
179
180 static void __init hdpu_setup_bridge(void)
181 {
182 struct mv64x60_setup_info si;
183 int i;
184
185 memset(&si, 0, sizeof(si));
186
187 si.phys_reg_base = HDPU_BRIDGE_REG_BASE;
188 si.pci_0.enable_bus = 1;
189 si.pci_0.pci_io.cpu_base = HDPU_PCI0_IO_START_PROC_ADDR;
190 si.pci_0.pci_io.pci_base_hi = 0;
191 si.pci_0.pci_io.pci_base_lo = HDPU_PCI0_IO_START_PCI_ADDR;
192 si.pci_0.pci_io.size = HDPU_PCI0_IO_SIZE;
193 si.pci_0.pci_io.swap = MV64x60_CPU2PCI_SWAP_NONE;
194 si.pci_0.pci_mem[0].cpu_base = HDPU_PCI0_MEM_START_PROC_ADDR;
195 si.pci_0.pci_mem[0].pci_base_hi = HDPU_PCI0_MEM_START_PCI_HI_ADDR;
196 si.pci_0.pci_mem[0].pci_base_lo = HDPU_PCI0_MEM_START_PCI_LO_ADDR;
197 si.pci_0.pci_mem[0].size = HDPU_PCI0_MEM_SIZE;
198 si.pci_0.pci_mem[0].swap = MV64x60_CPU2PCI_SWAP_NONE;
199 si.pci_0.pci_cmd_bits = 0;
200 si.pci_0.latency_timer = 0x80;
201
202 si.pci_1.enable_bus = 1;
203 si.pci_1.pci_io.cpu_base = HDPU_PCI1_IO_START_PROC_ADDR;
204 si.pci_1.pci_io.pci_base_hi = 0;
205 si.pci_1.pci_io.pci_base_lo = HDPU_PCI1_IO_START_PCI_ADDR;
206 si.pci_1.pci_io.size = HDPU_PCI1_IO_SIZE;
207 si.pci_1.pci_io.swap = MV64x60_CPU2PCI_SWAP_NONE;
208 si.pci_1.pci_mem[0].cpu_base = HDPU_PCI1_MEM_START_PROC_ADDR;
209 si.pci_1.pci_mem[0].pci_base_hi = HDPU_PCI1_MEM_START_PCI_HI_ADDR;
210 si.pci_1.pci_mem[0].pci_base_lo = HDPU_PCI1_MEM_START_PCI_LO_ADDR;
211 si.pci_1.pci_mem[0].size = HDPU_PCI1_MEM_SIZE;
212 si.pci_1.pci_mem[0].swap = MV64x60_CPU2PCI_SWAP_NONE;
213 si.pci_1.pci_cmd_bits = 0;
214 si.pci_1.latency_timer = 0x80;
215
216 for (i = 0; i < MV64x60_CPU2MEM_WINDOWS; i++) {
217 #if defined(CONFIG_NOT_COHERENT_CACHE)
218 si.cpu_prot_options[i] = 0;
219 si.enet_options[i] = MV64360_ENET2MEM_SNOOP_NONE;
220 si.mpsc_options[i] = MV64360_MPSC2MEM_SNOOP_NONE;
221 si.idma_options[i] = MV64360_IDMA2MEM_SNOOP_NONE;
222
223 si.pci_1.acc_cntl_options[i] =
224 MV64360_PCI_ACC_CNTL_SNOOP_NONE |
225 MV64360_PCI_ACC_CNTL_SWAP_NONE |
226 MV64360_PCI_ACC_CNTL_MBURST_128_BYTES |
227 MV64360_PCI_ACC_CNTL_RDSIZE_256_BYTES;
228
229 si.pci_0.acc_cntl_options[i] =
230 MV64360_PCI_ACC_CNTL_SNOOP_NONE |
231 MV64360_PCI_ACC_CNTL_SWAP_NONE |
232 MV64360_PCI_ACC_CNTL_MBURST_128_BYTES |
233 MV64360_PCI_ACC_CNTL_RDSIZE_256_BYTES;
234
235 #else
236 si.cpu_prot_options[i] = 0;
237 si.enet_options[i] = MV64360_ENET2MEM_SNOOP_WB; /* errata */
238 si.mpsc_options[i] = MV64360_MPSC2MEM_SNOOP_WB; /* errata */
239 si.idma_options[i] = MV64360_IDMA2MEM_SNOOP_WB; /* errata */
240
241 si.pci_0.acc_cntl_options[i] =
242 MV64360_PCI_ACC_CNTL_SNOOP_WB |
243 MV64360_PCI_ACC_CNTL_SWAP_NONE |
244 MV64360_PCI_ACC_CNTL_MBURST_32_BYTES |
245 MV64360_PCI_ACC_CNTL_RDSIZE_256_BYTES;
246
247 si.pci_1.acc_cntl_options[i] =
248 MV64360_PCI_ACC_CNTL_SNOOP_WB |
249 MV64360_PCI_ACC_CNTL_SWAP_NONE |
250 MV64360_PCI_ACC_CNTL_MBURST_32_BYTES |
251 MV64360_PCI_ACC_CNTL_RDSIZE_256_BYTES;
252 #endif
253 }
254
255 hdpu_cpustate_set(CPUSTATE_KERNEL_MAJOR | CPUSTATE_KERNEL_INIT_PCI);
256
257 /* Lookup PCI host bridges */
258 mv64x60_init(&bh, &si);
259 pci_dram_offset = 0; /* System mem at same addr on PCI & cpu bus */
260 ppc_md.pci_swizzle = common_swizzle;
261 ppc_md.pci_map_irq = hdpu_map_irq;
262
263 mv64x60_set_bus(&bh, 0, 0);
264 bh.hose_a->first_busno = 0;
265 bh.hose_a->last_busno = 0xff;
266 bh.hose_a->last_busno = pciauto_bus_scan(bh.hose_a, 0);
267
268 bh.hose_b->first_busno = bh.hose_a->last_busno + 1;
269 mv64x60_set_bus(&bh, 1, bh.hose_b->first_busno);
270 bh.hose_b->last_busno = 0xff;
271 bh.hose_b->last_busno = pciauto_bus_scan(bh.hose_b,
272 bh.hose_b->first_busno);
273
274 ppc_md.pci_exclude_device = mv64x60_pci_exclude_device;
275
276 hdpu_cpustate_set(CPUSTATE_KERNEL_MAJOR | CPUSTATE_KERNEL_INIT_REG);
277 /*
278 * Enabling of PCI internal-vs-external arbitration
279 * is a platform- and errata-dependent decision.
280 */
281 return;
282 }
283
284 #if defined(CONFIG_SERIAL_MPSC_CONSOLE)
285 static void __init hdpu_early_serial_map(void)
286 {
287 #ifdef CONFIG_KGDB
288 static char first_time = 1;
289
290 #if defined(CONFIG_KGDB_TTYS0)
291 #define KGDB_PORT 0
292 #elif defined(CONFIG_KGDB_TTYS1)
293 #define KGDB_PORT 1
294 #else
295 #error "Invalid kgdb_tty port"
296 #endif
297
298 if (first_time) {
299 gt_early_mpsc_init(KGDB_PORT,
300 B9600 | CS8 | CREAD | HUPCL | CLOCAL);
301 first_time = 0;
302 }
303
304 return;
305 #endif
306 }
307 #endif
308
309 static void hdpu_init2(void)
310 {
311 return;
312 }
313
314 #if defined(CONFIG_MV643XX_ETH)
315 static void __init hdpu_fixup_eth_pdata(struct platform_device *pd)
316 {
317
318 struct mv643xx_eth_platform_data *eth_pd;
319 eth_pd = pd->dev.platform_data;
320
321 eth_pd->port_serial_control =
322 mv64x60_read(&bh, MV643XX_ETH_PORT_SERIAL_CONTROL_REG(pd->id) & ~1);
323
324 eth_pd->force_phy_addr = 1;
325 eth_pd->phy_addr = pd->id;
326 eth_pd->tx_queue_size = 400;
327 eth_pd->rx_queue_size = 800;
328 }
329 #endif
330
331 static void __init hdpu_fixup_mpsc_pdata(struct platform_device *pd)
332 {
333
334 struct mpsc_pdata *pdata;
335
336 pdata = (struct mpsc_pdata *)pd->dev.platform_data;
337
338 pdata->max_idle = 40;
339 if (ppcboot_bd_valid)
340 pdata->default_baud = ppcboot_bd.bi_baudrate;
341 else
342 pdata->default_baud = HDPU_DEFAULT_BAUD;
343 pdata->brg_clk_src = HDPU_MPSC_CLK_SRC;
344 pdata->brg_clk_freq = HDPU_MPSC_CLK_FREQ;
345 }
346
347 #if defined(CONFIG_HDPU_FEATURES)
348 static void __init hdpu_fixup_cpustate_pdata(struct platform_device *pd)
349 {
350 struct platform_device *pds[1];
351 pds[0] = pd;
352 mv64x60_pd_fixup(&bh, pds, 1);
353 }
354 #endif
355
356 static int __init hdpu_platform_notify(struct device *dev)
357 {
358 static struct {
359 char *bus_id;
360 void ((*rtn) (struct platform_device * pdev));
361 } dev_map[] = {
362 {
363 MPSC_CTLR_NAME ".0", hdpu_fixup_mpsc_pdata},
364 #if defined(CONFIG_MV643XX_ETH)
365 {
366 MV643XX_ETH_NAME ".0", hdpu_fixup_eth_pdata},
367 #endif
368 #if defined(CONFIG_HDPU_FEATURES)
369 {
370 HDPU_CPUSTATE_NAME ".0", hdpu_fixup_cpustate_pdata},
371 #endif
372 };
373 struct platform_device *pdev;
374 int i;
375
376 if (dev && dev->bus_id)
377 for (i = 0; i < ARRAY_SIZE(dev_map); i++)
378 if (!strncmp(dev->bus_id, dev_map[i].bus_id,
379 BUS_ID_SIZE)) {
380
381 pdev = container_of(dev,
382 struct platform_device,
383 dev);
384 dev_map[i].rtn(pdev);
385 }
386
387 return 0;
388 }
389
390 static void __init hdpu_setup_arch(void)
391 {
392 if (ppc_md.progress)
393 ppc_md.progress("hdpu_setup_arch: enter", 0);
394 #ifdef CONFIG_BLK_DEV_INITRD
395 if (initrd_start)
396 ROOT_DEV = Root_RAM0;
397 else
398 #endif
399 #ifdef CONFIG_ROOT_NFS
400 ROOT_DEV = Root_NFS;
401 #else
402 ROOT_DEV = Root_SDA2;
403 #endif
404
405 ppc_md.heartbeat = hdpu_heartbeat;
406
407 ppc_md.heartbeat_reset = HZ;
408 ppc_md.heartbeat_count = 1;
409
410 if (ppc_md.progress)
411 ppc_md.progress("hdpu_setup_arch: Enabling L2 cache", 0);
412
413 /* Enable L1 Parity Bits */
414 hdpu_set_l1pe();
415
416 /* Enable L2 and L3 caches (if 745x) */
417 _set_L2CR(0x80080000);
418
419 if (ppc_md.progress)
420 ppc_md.progress("hdpu_setup_arch: enter", 0);
421
422 hdpu_setup_bridge();
423
424 hdpu_setup_peripherals();
425
426 #ifdef CONFIG_SERIAL_MPSC_CONSOLE
427 hdpu_early_serial_map();
428 #endif
429
430 printk("SKY HDPU Compute Blade \n");
431
432 if (ppc_md.progress)
433 ppc_md.progress("hdpu_setup_arch: exit", 0);
434
435 hdpu_cpustate_set(CPUSTATE_KERNEL_MAJOR | CPUSTATE_KERNEL_OK);
436 return;
437 }
438 static void __init hdpu_init_irq(void)
439 {
440 mv64360_init_irq();
441 }
442
443 static void __init hdpu_set_l1pe()
444 {
445 unsigned long ictrl;
446 asm volatile ("mfspr %0, 1011":"=r" (ictrl):);
447 ictrl |= ICTRL_EICE | ICTRL_EDC | ICTRL_EICP;
448 asm volatile ("mtspr 1011, %0"::"r" (ictrl));
449 }
450
451 /*
452 * Set BAT 1 to map 0xf1000000 to end of physical memory space.
453 */
454 static __inline__ void hdpu_set_bat(void)
455 {
456 mb();
457 mtspr(SPRN_DBAT1U, 0xf10001fe);
458 mtspr(SPRN_DBAT1L, 0xf100002a);
459 mb();
460
461 return;
462 }
463
464 unsigned long __init hdpu_find_end_of_memory(void)
465 {
466 return mv64x60_get_mem_size(CONFIG_MV64X60_NEW_BASE,
467 MV64x60_TYPE_MV64360);
468 }
469
470 static void hdpu_reset_board(void)
471 {
472 volatile int infinite = 1;
473
474 hdpu_cpustate_set(CPUSTATE_KERNEL_MAJOR | CPUSTATE_KERNEL_RESET);
475
476 local_irq_disable();
477
478 /* Clear all the LEDs */
479 mv64x60_write(&bh, MV64x60_GPP_VALUE_CLR, ((1 << 4) |
480 (1 << 5) | (1 << 6)));
481
482 /* disable and invalidate the L2 cache */
483 _set_L2CR(0);
484 _set_L2CR(0x200000);
485
486 /* flush and disable L1 I/D cache */
487 __asm__ __volatile__
488 ("\n"
489 "mfspr 3,1008\n"
490 "ori 5,5,0xcc00\n"
491 "ori 4,3,0xc00\n"
492 "andc 5,3,5\n"
493 "sync\n"
494 "mtspr 1008,4\n"
495 "isync\n" "sync\n" "mtspr 1008,5\n" "isync\n" "sync\n");
496
497 /* Hit the reset bit */
498 mv64x60_write(&bh, MV64x60_GPP_VALUE_CLR, (1 << 3));
499
500 while (infinite)
501 infinite = infinite;
502
503 return;
504 }
505
506 static void hdpu_restart(char *cmd)
507 {
508 volatile ulong i = 10000000;
509
510 hdpu_reset_board();
511
512 while (i-- > 0) ;
513 panic("restart failed\n");
514 }
515
516 static void hdpu_halt(void)
517 {
518 local_irq_disable();
519
520 hdpu_cpustate_set(CPUSTATE_KERNEL_MAJOR | CPUSTATE_KERNEL_HALT);
521
522 /* Clear all the LEDs */
523 mv64x60_write(&bh, MV64x60_GPP_VALUE_CLR, ((1 << 4) | (1 << 5) |
524 (1 << 6)));
525 while (1) ;
526 /* NOTREACHED */
527 }
528
529 static void hdpu_power_off(void)
530 {
531 hdpu_halt();
532 /* NOTREACHED */
533 }
534
535 static int hdpu_show_cpuinfo(struct seq_file *m)
536 {
537 uint pvid;
538
539 pvid = mfspr(SPRN_PVR);
540 seq_printf(m, "vendor\t\t: Sky Computers\n");
541 seq_printf(m, "machine\t\t: HDPU Compute Blade\n");
542 seq_printf(m, "PVID\t\t: 0x%x, vendor: %s\n",
543 pvid, (pvid & (1 << 15) ? "IBM" : "Motorola"));
544
545 return 0;
546 }
547
548 static void __init hdpu_calibrate_decr(void)
549 {
550 ulong freq;
551
552 if (ppcboot_bd_valid)
553 freq = ppcboot_bd.bi_busfreq / 4;
554 else
555 freq = 133000000;
556
557 printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
558 freq / 1000000, freq % 1000000);
559
560 tb_ticks_per_jiffy = freq / HZ;
561 tb_to_us = mulhwu_scale_factor(freq, 1000000);
562
563 return;
564 }
565
566 static void parse_bootinfo(unsigned long r3,
567 unsigned long r4, unsigned long r5,
568 unsigned long r6, unsigned long r7)
569 {
570 bd_t *bd = NULL;
571 char *cmdline_start = NULL;
572 int cmdline_len = 0;
573
574 if (r3) {
575 if ((r3 & 0xf0000000) == 0)
576 r3 += KERNELBASE;
577 if ((r3 & 0xf0000000) == KERNELBASE) {
578 bd = (void *)r3;
579
580 memcpy(&ppcboot_bd, bd, sizeof(ppcboot_bd));
581 ppcboot_bd_valid = 1;
582 }
583 }
584 #ifdef CONFIG_BLK_DEV_INITRD
585 if (r4 && r5 && r5 > r4) {
586 if ((r4 & 0xf0000000) == 0)
587 r4 += KERNELBASE;
588 if ((r5 & 0xf0000000) == 0)
589 r5 += KERNELBASE;
590 if ((r4 & 0xf0000000) == KERNELBASE) {
591 initrd_start = r4;
592 initrd_end = r5;
593 initrd_below_start_ok = 1;
594 }
595 }
596 #endif /* CONFIG_BLK_DEV_INITRD */
597
598 if (r6 && r7 && r7 > r6) {
599 if ((r6 & 0xf0000000) == 0)
600 r6 += KERNELBASE;
601 if ((r7 & 0xf0000000) == 0)
602 r7 += KERNELBASE;
603 if ((r6 & 0xf0000000) == KERNELBASE) {
604 cmdline_start = (void *)r6;
605 cmdline_len = (r7 - r6);
606 strncpy(cmd_line, cmdline_start, cmdline_len);
607 }
608 }
609 }
610
611 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
612 static int hdpu_ide_check_region(ide_ioreg_t from, unsigned int extent)
613 {
614 return check_region(from, extent);
615 }
616
617 static void
618 hdpu_ide_request_region(ide_ioreg_t from, unsigned int extent, const char *name)
619 {
620 request_region(from, extent, name);
621 return;
622 }
623
624 static void hdpu_ide_release_region(ide_ioreg_t from, unsigned int extent)
625 {
626 release_region(from, extent);
627 return;
628 }
629
630 static void __init
631 hdpu_ide_pci_init_hwif_ports(hw_regs_t * hw, ide_ioreg_t data_port,
632 ide_ioreg_t ctrl_port, int *irq)
633 {
634 struct pci_dev *dev;
635
636 pci_for_each_dev(dev) {
637 if (((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) ||
638 ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID)) {
639 hw->irq = dev->irq;
640
641 if (irq != NULL) {
642 *irq = dev->irq;
643 }
644 }
645 }
646
647 return;
648 }
649 #endif
650
651 void hdpu_heartbeat(void)
652 {
653 if (mv64x60_read(&bh, MV64x60_GPP_VALUE) & (1 << 5))
654 mv64x60_write(&bh, MV64x60_GPP_VALUE_CLR, (1 << 5));
655 else
656 mv64x60_write(&bh, MV64x60_GPP_VALUE_SET, (1 << 5));
657
658 ppc_md.heartbeat_count = ppc_md.heartbeat_reset;
659
660 }
661
662 static void __init hdpu_map_io(void)
663 {
664 io_block_mapping(0xf1000000, 0xf1000000, 0x20000, _PAGE_IO);
665 }
666
667 #ifdef CONFIG_SMP
668 char hdpu_smp0[] = "SMP Cpu #0";
669 char hdpu_smp1[] = "SMP Cpu #1";
670
671 static irqreturn_t hdpu_smp_cpu0_int_handler(int irq, void *dev_id,
672 struct pt_regs *regs)
673 {
674 volatile unsigned int doorbell;
675
676 doorbell = mv64x60_read(&bh, MV64360_CPU0_DOORBELL);
677
678 /* Ack the doorbell interrupts */
679 mv64x60_write(&bh, MV64360_CPU0_DOORBELL_CLR, doorbell);
680
681 if (doorbell & 1) {
682 smp_message_recv(0, regs);
683 }
684 if (doorbell & 2) {
685 smp_message_recv(1, regs);
686 }
687 if (doorbell & 4) {
688 smp_message_recv(2, regs);
689 }
690 if (doorbell & 8) {
691 smp_message_recv(3, regs);
692 }
693 return IRQ_HANDLED;
694 }
695
696 static irqreturn_t hdpu_smp_cpu1_int_handler(int irq, void *dev_id,
697 struct pt_regs *regs)
698 {
699 volatile unsigned int doorbell;
700
701 doorbell = mv64x60_read(&bh, MV64360_CPU1_DOORBELL);
702
703 /* Ack the doorbell interrupts */
704 mv64x60_write(&bh, MV64360_CPU1_DOORBELL_CLR, doorbell);
705
706 if (doorbell & 1) {
707 smp_message_recv(0, regs);
708 }
709 if (doorbell & 2) {
710 smp_message_recv(1, regs);
711 }
712 if (doorbell & 4) {
713 smp_message_recv(2, regs);
714 }
715 if (doorbell & 8) {
716 smp_message_recv(3, regs);
717 }
718 return IRQ_HANDLED;
719 }
720
721 static void smp_hdpu_CPU_two(void)
722 {
723 __asm__ __volatile__
724 ("\n"
725 "lis 3,0x0000\n"
726 "ori 3,3,0x00c0\n"
727 "mtspr 26, 3\n" "li 4,0\n" "mtspr 27,4\n" "rfi");
728
729 }
730
731 static int smp_hdpu_probe(void)
732 {
733 int *cpu_count_reg;
734 int num_cpus = 0;
735
736 cpu_count_reg = ioremap(HDPU_NEXUS_ID_BASE, HDPU_NEXUS_ID_SIZE);
737 if (cpu_count_reg) {
738 num_cpus = (*cpu_count_reg >> 20) & 0x3;
739 iounmap(cpu_count_reg);
740 }
741
742 /* Validate the bits in the CPLD. If we could not map the reg, return 2.
743 * If the register reported 0 or 3, return 2.
744 * Older CPLD revisions set these bits to all ones (val = 3).
745 */
746 if ((num_cpus < 1) || (num_cpus > 2)) {
747 printk
748 ("Unable to determine the number of processors %d . deafulting to 2.\n",
749 num_cpus);
750 num_cpus = 2;
751 }
752 return num_cpus;
753 }
754
755 static void
756 smp_hdpu_message_pass(int target, int msg, unsigned long data, int wait)
757 {
758 if (msg > 0x3) {
759 printk("SMP %d: smp_message_pass: unknown msg %d\n",
760 smp_processor_id(), msg);
761 return;
762 }
763 switch (target) {
764 case MSG_ALL:
765 mv64x60_write(&bh, MV64360_CPU0_DOORBELL, 1 << msg);
766 mv64x60_write(&bh, MV64360_CPU1_DOORBELL, 1 << msg);
767 break;
768 case MSG_ALL_BUT_SELF:
769 if (smp_processor_id())
770 mv64x60_write(&bh, MV64360_CPU0_DOORBELL, 1 << msg);
771 else
772 mv64x60_write(&bh, MV64360_CPU1_DOORBELL, 1 << msg);
773 break;
774 default:
775 if (target == 0)
776 mv64x60_write(&bh, MV64360_CPU0_DOORBELL, 1 << msg);
777 else
778 mv64x60_write(&bh, MV64360_CPU1_DOORBELL, 1 << msg);
779 break;
780 }
781 }
782
783 static void smp_hdpu_kick_cpu(int nr)
784 {
785 volatile unsigned int *bootaddr;
786
787 if (ppc_md.progress)
788 ppc_md.progress("smp_hdpu_kick_cpu", 0);
789
790 hdpu_cpustate_set(CPUSTATE_KERNEL_MAJOR | CPUSTATE_KERNEL_CPU1_KICK);
791
792 /* Disable BootCS. Must also reduce the windows size to zero. */
793 bh.ci->disable_window_32bit(&bh, MV64x60_CPU2BOOT_WIN);
794 mv64x60_set_32bit_window(&bh, MV64x60_CPU2BOOT_WIN, 0, 0, 0);
795
796 bootaddr = ioremap(HDPU_INTERNAL_SRAM_BASE, HDPU_INTERNAL_SRAM_SIZE);
797 if (!bootaddr) {
798 if (ppc_md.progress)
799 ppc_md.progress("smp_hdpu_kick_cpu: ioremap failed", 0);
800 return;
801 }
802
803 memcpy((void *)(bootaddr + 0x40), (void *)&smp_hdpu_CPU_two, 0x20);
804
805 /* map SRAM to 0xfff00000 */
806 bh.ci->disable_window_32bit(&bh, MV64x60_CPU2SRAM_WIN);
807
808 mv64x60_set_32bit_window(&bh, MV64x60_CPU2SRAM_WIN,
809 0xfff00000, HDPU_INTERNAL_SRAM_SIZE, 0);
810 bh.ci->enable_window_32bit(&bh, MV64x60_CPU2SRAM_WIN);
811
812 /* Enable CPU1 arbitration */
813 mv64x60_clr_bits(&bh, MV64x60_CPU_MASTER_CNTL, (1 << 9));
814
815 /*
816 * Wait 100mSecond until other CPU has reached __secondary_start.
817 * When it reaches, it is permittable to rever the SRAM mapping etc...
818 */
819 mdelay(100);
820 *(unsigned long *)KERNELBASE = nr;
821 asm volatile ("dcbf 0,%0"::"r" (KERNELBASE):"memory");
822
823 iounmap(bootaddr);
824
825 /* Set up window for internal sram (256KByte insize) */
826 bh.ci->disable_window_32bit(&bh, MV64x60_CPU2SRAM_WIN);
827 mv64x60_set_32bit_window(&bh, MV64x60_CPU2SRAM_WIN,
828 HDPU_INTERNAL_SRAM_BASE,
829 HDPU_INTERNAL_SRAM_SIZE, 0);
830 bh.ci->enable_window_32bit(&bh, MV64x60_CPU2SRAM_WIN);
831 /*
832 * Set up windows for embedded FLASH (using boot CS window).
833 */
834
835 bh.ci->disable_window_32bit(&bh, MV64x60_CPU2BOOT_WIN);
836 mv64x60_set_32bit_window(&bh, MV64x60_CPU2BOOT_WIN,
837 HDPU_EMB_FLASH_BASE, HDPU_EMB_FLASH_SIZE, 0);
838 bh.ci->enable_window_32bit(&bh, MV64x60_CPU2BOOT_WIN);
839 }
840
841 static void smp_hdpu_setup_cpu(int cpu_nr)
842 {
843 if (cpu_nr == 0) {
844 if (ppc_md.progress)
845 ppc_md.progress("smp_hdpu_setup_cpu 0", 0);
846 mv64x60_write(&bh, MV64360_CPU0_DOORBELL_CLR, 0xff);
847 mv64x60_write(&bh, MV64360_CPU0_DOORBELL_MASK, 0xff);
848 request_irq(60, hdpu_smp_cpu0_int_handler,
849 SA_INTERRUPT, hdpu_smp0, 0);
850 }
851
852 if (cpu_nr == 1) {
853 if (ppc_md.progress)
854 ppc_md.progress("smp_hdpu_setup_cpu 1", 0);
855
856 hdpu_cpustate_set(CPUSTATE_KERNEL_MAJOR |
857 CPUSTATE_KERNEL_CPU1_OK);
858
859 /* Enable L1 Parity Bits */
860 hdpu_set_l1pe();
861
862 /* Enable L2 cache */
863 _set_L2CR(0);
864 _set_L2CR(0x80080000);
865
866 mv64x60_write(&bh, MV64360_CPU1_DOORBELL_CLR, 0x0);
867 mv64x60_write(&bh, MV64360_CPU1_DOORBELL_MASK, 0xff);
868 request_irq(28, hdpu_smp_cpu1_int_handler,
869 SA_INTERRUPT, hdpu_smp1, 0);
870 }
871
872 }
873
874 void __devinit hdpu_tben_give()
875 {
876 volatile unsigned long *val = 0;
877
878 /* By writing 0 to the TBEN_BASE, the timebases is frozen */
879 val = ioremap(HDPU_TBEN_BASE, 4);
880 *val = 0;
881 mb();
882
883 spin_lock(&timebase_lock);
884 timebase_upper = get_tbu();
885 timebase_lower = get_tbl();
886 spin_unlock(&timebase_lock);
887
888 while (timebase_upper || timebase_lower)
889 barrier();
890
891 /* By writing 1 to the TBEN_BASE, the timebases is thawed */
892 *val = 1;
893 mb();
894
895 iounmap(val);
896
897 }
898
899 void __devinit hdpu_tben_take()
900 {
901 while (!(timebase_upper || timebase_lower))
902 barrier();
903
904 spin_lock(&timebase_lock);
905 set_tb(timebase_upper, timebase_lower);
906 timebase_upper = 0;
907 timebase_lower = 0;
908 spin_unlock(&timebase_lock);
909 }
910
911 static struct smp_ops_t hdpu_smp_ops = {
912 .message_pass = smp_hdpu_message_pass,
913 .probe = smp_hdpu_probe,
914 .kick_cpu = smp_hdpu_kick_cpu,
915 .setup_cpu = smp_hdpu_setup_cpu,
916 .give_timebase = hdpu_tben_give,
917 .take_timebase = hdpu_tben_take,
918 };
919 #endif /* CONFIG_SMP */
920
921 void __init
922 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
923 unsigned long r6, unsigned long r7)
924 {
925 parse_bootinfo(r3, r4, r5, r6, r7);
926
927 isa_mem_base = 0;
928
929 ppc_md.setup_arch = hdpu_setup_arch;
930 ppc_md.init = hdpu_init2;
931 ppc_md.show_cpuinfo = hdpu_show_cpuinfo;
932 ppc_md.init_IRQ = hdpu_init_irq;
933 ppc_md.get_irq = mv64360_get_irq;
934 ppc_md.restart = hdpu_restart;
935 ppc_md.power_off = hdpu_power_off;
936 ppc_md.halt = hdpu_halt;
937 ppc_md.find_end_of_memory = hdpu_find_end_of_memory;
938 ppc_md.calibrate_decr = hdpu_calibrate_decr;
939 ppc_md.setup_io_mappings = hdpu_map_io;
940
941 bh.p_base = CONFIG_MV64X60_NEW_BASE;
942 bh.v_base = (unsigned long *)bh.p_base;
943
944 hdpu_set_bat();
945
946 #if defined(CONFIG_SERIAL_TEXT_DEBUG)
947 ppc_md.progress = hdpu_mpsc_progress; /* embedded UART */
948 mv64x60_progress_init(bh.p_base);
949 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
950
951 #ifdef CONFIG_SMP
952 ppc_md.smp_ops = &hdpu_smp_ops;
953 #endif /* CONFIG_SMP */
954
955 #if defined(CONFIG_SERIAL_MPSC) || defined(CONFIG_MV643XX_ETH)
956 platform_notify = hdpu_platform_notify;
957 #endif
958 return;
959 }
960
961 #if defined(CONFIG_SERIAL_TEXT_DEBUG) && defined(CONFIG_SERIAL_MPSC_CONSOLE)
962 /* SMP safe version of the serial text debug routine. Uses Semaphore 0 */
963 void hdpu_mpsc_progress(char *s, unsigned short hex)
964 {
965 while (mv64x60_read(&bh, MV64360_WHO_AM_I) !=
966 mv64x60_read(&bh, MV64360_SEMAPHORE_0)) {
967 }
968 mv64x60_mpsc_progress(s, hex);
969 mv64x60_write(&bh, MV64360_SEMAPHORE_0, 0xff);
970 }
971 #endif
972
973 static void hdpu_cpustate_set(unsigned char new_state)
974 {
975 unsigned int state = (new_state << 21);
976 mv64x60_write(&bh, MV64x60_GPP_VALUE_CLR, (0xff << 21));
977 mv64x60_write(&bh, MV64x60_GPP_VALUE_CLR, state);
978 }
979
980 #ifdef CONFIG_MTD_PHYSMAP
981 static struct mtd_partition hdpu_partitions[] = {
982 {
983 .name = "Root FS",
984 .size = 0x03400000,
985 .offset = 0,
986 .mask_flags = 0,
987 },{
988 .name = "User FS",
989 .size = 0x00800000,
990 .offset = 0x03400000,
991 .mask_flags = 0,
992 },{
993 .name = "Kernel Image",
994 .size = 0x002C0000,
995 .offset = 0x03C00000,
996 .mask_flags = 0,
997 },{
998 .name = "bootEnv",
999 .size = 0x00040000,
1000 .offset = 0x03EC0000,
1001 .mask_flags = 0,
1002 },{
1003 .name = "bootROM",
1004 .size = 0x00100000,
1005 .offset = 0x03F00000,
1006 .mask_flags = 0,
1007 }
1008 };
1009
1010 static int __init hdpu_setup_mtd(void)
1011 {
1012
1013 physmap_set_partitions(hdpu_partitions, 5);
1014 return 0;
1015 }
1016
1017 arch_initcall(hdpu_setup_mtd);
1018 #endif
1019
1020 #ifdef CONFIG_HDPU_FEATURES
1021
1022 static struct resource hdpu_cpustate_resources[] = {
1023 [0] = {
1024 .name = "addr base",
1025 .start = MV64x60_GPP_VALUE_SET,
1026 .end = MV64x60_GPP_VALUE_CLR + 1,
1027 .flags = IORESOURCE_MEM,
1028 },
1029 };
1030
1031 static struct resource hdpu_nexus_resources[] = {
1032 [0] = {
1033 .name = "nexus register",
1034 .start = HDPU_NEXUS_ID_BASE,
1035 .end = HDPU_NEXUS_ID_BASE + HDPU_NEXUS_ID_SIZE,
1036 .flags = IORESOURCE_MEM,
1037 },
1038 };
1039
1040 static struct platform_device hdpu_cpustate_device = {
1041 .name = HDPU_CPUSTATE_NAME,
1042 .id = 0,
1043 .num_resources = ARRAY_SIZE(hdpu_cpustate_resources),
1044 .resource = hdpu_cpustate_resources,
1045 };
1046
1047 static struct platform_device hdpu_nexus_device = {
1048 .name = HDPU_NEXUS_NAME,
1049 .id = 0,
1050 .num_resources = ARRAY_SIZE(hdpu_nexus_resources),
1051 .resource = hdpu_nexus_resources,
1052 };
1053
1054 static int __init hdpu_add_pds(void)
1055 {
1056 platform_device_register(&hdpu_cpustate_device);
1057 platform_device_register(&hdpu_nexus_device);
1058 return 0;
1059 }
1060
1061 arch_initcall(hdpu_add_pds);
1062 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree