2 * Copyright (C) 1995 Linus Torvalds
3 * Adapted from 'alpha' version by Gary Thomas
4 * Modified by Cort Dougan (cort@cs.nmt.edu)
6 * Support for PReP (Motorola MTX/MVME)
7 * by Troy Benjegerdes (hozer@drgw.net)
11 * bootup setup stuff..
14 #include <linux/delay.h>
15 #include <linux/module.h>
16 #include <linux/errno.h>
17 #include <linux/sched.h>
18 #include <linux/kernel.h>
20 #include <linux/stddef.h>
21 #include <linux/unistd.h>
22 #include <linux/ptrace.h>
23 #include <linux/slab.h>
24 #include <linux/user.h>
25 #include <linux/a.out.h>
26 #include <linux/screen_info.h>
27 #include <linux/major.h>
28 #include <linux/interrupt.h>
29 #include <linux/reboot.h>
30 #include <linux/init.h>
31 #include <linux/initrd.h>
32 #include <linux/ioport.h>
33 #include <linux/console.h>
34 #include <linux/timex.h>
35 #include <linux/pci.h>
36 #include <linux/ide.h>
37 #include <linux/seq_file.h>
38 #include <linux/root_dev.h>
40 #include <asm/sections.h>
42 #include <asm/processor.h>
43 #include <asm/residual.h>
45 #include <asm/pgtable.h>
46 #include <asm/cache.h>
48 #include <asm/machdep.h>
49 #include <asm/mc146818rtc.h>
50 #include <asm/mk48t59.h>
51 #include <asm/prep_nvram.h>
52 #include <asm/raven.h>
55 #include <asm/mpc10x.h>
56 #include <asm/i8259.h>
57 #include <asm/open_pic.h>
58 #include <asm/pci-bridge.h>
61 /* prep registers for L2 */
62 #define CACHECRBA 0x80000823 /* Cache configuration register address */
63 #define L2CACHE_MASK 0x03 /* Mask for 2 L2 Cache bits */
64 #define L2CACHE_512KB 0x00 /* 512KB */
65 #define L2CACHE_256KB 0x01 /* 256KB */
66 #define L2CACHE_1MB 0x02 /* 1MB */
67 #define L2CACHE_NONE 0x03 /* NONE */
68 #define L2CACHE_PARITY 0x08 /* Mask for L2 Cache Parity Protected bit */
72 extern unsigned char prep_nvram_read_val(int addr);
73 extern void prep_nvram_write_val(int addr,
75 extern unsigned char rs_nvram_read_val(int addr);
76 extern void rs_nvram_write_val(int addr,
78 extern void ibm_prep_init(void);
80 extern void prep_find_bridges(void);
84 extern void prep_residual_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
85 extern void prep_sandalfoot_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
86 extern void prep_thinkpad_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
87 extern void prep_carolina_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
88 extern void prep_tiger1_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
91 #define cached_21 (((char *)(ppc_cached_irq_mask))[3])
92 #define cached_A1 (((char *)(ppc_cached_irq_mask))[2])
94 #ifdef CONFIG_SOUND_CS4232
95 long ppc_cs4232_dma, ppc_cs4232_dma2;
98 extern PTE *Hash, *Hash_end;
99 extern unsigned long Hash_size, Hash_mask;
100 extern int probingmem;
101 extern unsigned long loops_per_jiffy;
103 #ifdef CONFIG_SOUND_CS4232
104 EXPORT_SYMBOL(ppc_cs4232_dma);
105 EXPORT_SYMBOL(ppc_cs4232_dma2);
108 /* useful ISA ports */
109 #define PREP_SYSCTL 0x81c
110 /* present in the IBM reference design; possibly identical in Mot boxes: */
111 #define PREP_IBM_SIMM_ID 0x803 /* SIMM size: 32 or 8 MiB */
112 #define PREP_IBM_SIMM_PRESENCE 0x804
113 #define PREP_IBM_EQUIPMENT 0x80c
114 #define PREP_IBM_L2INFO 0x80d
115 #define PREP_IBM_PM1 0x82a /* power management register 1 */
116 #define PREP_IBM_PLANAR 0x852 /* planar ID - identifies the motherboard */
117 #define PREP_IBM_DISP 0x8c0 /* 4-digit LED display */
119 /* Equipment Present Register masks: */
120 #define PREP_IBM_EQUIPMENT_RESERVED 0x80
121 #define PREP_IBM_EQUIPMENT_SCSIFUSE 0x40
122 #define PREP_IBM_EQUIPMENT_L2_COPYBACK 0x08
123 #define PREP_IBM_EQUIPMENT_L2_256 0x04
124 #define PREP_IBM_EQUIPMENT_CPU 0x02
125 #define PREP_IBM_EQUIPMENT_L2 0x01
127 /* planar ID values: */
128 /* Sandalfoot/Sandalbow (6015/7020) */
129 #define PREP_IBM_SANDALFOOT 0xfc
130 /* Woodfield, Thinkpad 850/860 (6042/7249) */
131 #define PREP_IBM_THINKPAD 0xff /* planar ID unimplemented */
132 /* PowerSeries 830/850 (6050/6070) */
133 #define PREP_IBM_CAROLINA_IDE_0 0xf0
134 #define PREP_IBM_CAROLINA_IDE_1 0xf1
135 #define PREP_IBM_CAROLINA_IDE_2 0xf2
136 #define PREP_IBM_CAROLINA_IDE_3 0xf3
138 #define PREP_IBM_CAROLINA_SCSI_0 0xf4
139 #define PREP_IBM_CAROLINA_SCSI_1 0xf5
140 #define PREP_IBM_CAROLINA_SCSI_2 0xf6
141 #define PREP_IBM_CAROLINA_SCSI_3 0xf7 /* missing from Carolina Tech Spec */
142 /* Tiger1 (7043-140) */
143 #define PREP_IBM_TIGER1_133 0xd1
144 #define PREP_IBM_TIGER1_166 0xd2
145 #define PREP_IBM_TIGER1_180 0xd3
146 #define PREP_IBM_TIGER1_xxx 0xd4 /* unknown, but probably exists */
147 #define PREP_IBM_TIGER1_333 0xd5 /* missing from Tiger Tech Spec */
150 * set Motherboard_map_name, Motherboard_map, Motherboard_routes.
151 * return 8259 edge/level masks.
153 void (*setup_ibm_pci)(char *irq_lo, char *irq_hi);
155 extern char *Motherboard_map_name; /* for use in *_cpuinfo */
158 * As found in the PReP reference implementation.
159 * Used by Thinkpad, Sandalfoot (6015/7020), and all Motorola PReP.
162 prep_gen_enable_l2(void)
164 outb(inb(PREP_SYSCTL) | 0x3, PREP_SYSCTL);
167 /* Used by Carolina and Tiger1 */
169 prep_carolina_enable_l2(void)
171 outb(inb(PREP_SYSCTL) | 0xc0, PREP_SYSCTL);
174 /* cpuinfo code common to all IBM PReP */
176 prep_ibm_cpuinfo(struct seq_file *m)
178 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
180 seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
182 seq_printf(m, "upgrade cpu\t: ");
183 if (equip_reg & PREP_IBM_EQUIPMENT_CPU) {
184 seq_printf(m, "not ");
186 seq_printf(m, "present\n");
188 /* print info about the SCSI fuse */
189 seq_printf(m, "scsi fuse\t: ");
190 if (equip_reg & PREP_IBM_EQUIPMENT_SCSIFUSE)
193 seq_printf(m, "bad");
196 /* print info about SIMMs */
197 if (have_residual_data) {
199 seq_printf(m, "simms\t\t: ");
200 for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
201 if (res->Memories[i].SIMMSize != 0)
202 seq_printf(m, "%d:%ldMiB ", i,
203 (res->Memories[i].SIMMSize > 1024) ?
204 res->Memories[i].SIMMSize>>20 :
205 res->Memories[i].SIMMSize);
212 prep_gen_cpuinfo(struct seq_file *m)
219 prep_sandalfoot_cpuinfo(struct seq_file *m)
221 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
225 /* report amount and type of L2 cache present */
226 seq_printf(m, "L2 cache\t: ");
227 if (equip_reg & PREP_IBM_EQUIPMENT_L2) {
228 seq_printf(m, "not present");
230 if (equip_reg & PREP_IBM_EQUIPMENT_L2_256)
231 seq_printf(m, "256KiB");
233 seq_printf(m, "unknown size");
235 if (equip_reg & PREP_IBM_EQUIPMENT_L2_COPYBACK)
236 seq_printf(m, ", copy-back");
238 seq_printf(m, ", write-through");
246 prep_thinkpad_cpuinfo(struct seq_file *m)
248 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
249 char *cpubus_speed, *pci_speed;
253 /* report amount and type of L2 cache present */
254 seq_printf(m, "l2 cache\t: ");
255 if ((equip_reg & 0x1) == 0) {
256 switch ((equip_reg & 0xc) >> 2) {
258 seq_printf(m, "128KiB look-aside 2-way write-through\n");
261 seq_printf(m, "512KiB look-aside direct-mapped write-back\n");
264 seq_printf(m, "256KiB look-aside 2-way write-through\n");
267 seq_printf(m, "256KiB look-aside direct-mapped write-back\n");
271 seq_printf(m, "not present\n");
274 /* report bus speeds because we can */
275 if ((equip_reg & 0x80) == 0) {
276 switch ((equip_reg & 0x30) >> 4) {
286 cpubus_speed = "unknown";
287 pci_speed = "unknown";
291 switch ((equip_reg & 0x30) >> 4) {
305 cpubus_speed = "unknown";
306 pci_speed = "unknown";
310 seq_printf(m, "60x bus\t\t: %sMHz\n", cpubus_speed);
311 seq_printf(m, "pci bus\t\t: %sMHz\n", pci_speed);
317 prep_carolina_cpuinfo(struct seq_file *m)
319 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
323 /* report amount and type of L2 cache present */
324 seq_printf(m, "l2 cache\t: ");
325 if ((equip_reg & 0x1) == 0) {
326 unsigned int l2_reg = inb(PREP_IBM_L2INFO);
329 if ((l2_reg & 0x60) == 0)
330 seq_printf(m, "256KiB");
331 else if ((l2_reg & 0x60) == 0x20)
332 seq_printf(m, "512KiB");
334 seq_printf(m, "unknown size");
337 if ((l2_reg & 0x3) == 0)
338 seq_printf(m, ", async");
339 else if ((l2_reg & 0x3) == 1)
340 seq_printf(m, ", sync");
342 seq_printf(m, ", unknown type");
346 seq_printf(m, "not present\n");
353 prep_tiger1_cpuinfo(struct seq_file *m)
355 unsigned int l2_reg = inb(PREP_IBM_L2INFO);
359 /* report amount and type of L2 cache present */
360 seq_printf(m, "l2 cache\t: ");
361 if ((l2_reg & 0xf) == 0xf) {
362 seq_printf(m, "not present\n");
365 seq_printf(m, "async, ");
367 seq_printf(m, "sync burst, ");
370 seq_printf(m, "parity, ");
372 seq_printf(m, "no parity, ");
374 switch (l2_reg & 0x3) {
376 seq_printf(m, "256KiB\n");
379 seq_printf(m, "512KiB\n");
382 seq_printf(m, "1MiB\n");
385 seq_printf(m, "unknown size\n");
394 /* Used by all Motorola PReP */
396 prep_mot_cpuinfo(struct seq_file *m)
398 unsigned int cachew = *((unsigned char *)CACHECRBA);
400 seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
402 /* report amount and type of L2 cache present */
403 seq_printf(m, "l2 cache\t: ");
404 switch (cachew & L2CACHE_MASK) {
406 seq_printf(m, "512KiB");
409 seq_printf(m, "256KiB");
412 seq_printf(m, "1MiB");
415 seq_printf(m, "none\n");
419 seq_printf(m, "%x\n", cachew);
422 seq_printf(m, ", parity %s",
423 (cachew & L2CACHE_PARITY)? "enabled" : "disabled");
425 seq_printf(m, " SRAM:");
427 switch ( ((cachew & 0xf0) >> 4) & ~(0x3) ) {
428 case 1: seq_printf(m, "synchronous, parity, flow-through\n");
430 case 2: seq_printf(m, "asynchronous, no parity\n");
432 case 3: seq_printf(m, "asynchronous, parity\n");
434 default:seq_printf(m, "synchronous, pipelined, no parity\n");
439 /* print info about SIMMs */
440 if (have_residual_data) {
442 seq_printf(m, "simms\t\t: ");
443 for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
444 if (res->Memories[i].SIMMSize != 0)
445 seq_printf(m, "%d:%ldM ", i,
446 (res->Memories[i].SIMMSize > 1024) ?
447 res->Memories[i].SIMMSize>>20 :
448 res->Memories[i].SIMMSize);
457 prep_restart(char *cmd)
459 #define PREP_SP92 0x92 /* Special Port 92 */
460 local_irq_disable(); /* no interrupts */
462 /* set exception prefix high - to the prom */
463 _nmask_and_or_msr(0, MSR_IP);
465 /* make sure bit 0 (reset) is a 0 */
466 outb( inb(PREP_SP92) & ~1L , PREP_SP92);
467 /* signal a reset to system control port A - soft reset */
468 outb( inb(PREP_SP92) | 1 , PREP_SP92);
478 local_irq_disable(); /* no interrupts */
480 /* set exception prefix high - to the prom */
481 _nmask_and_or_msr(0, MSR_IP);
487 /* Carrera is the power manager in the Thinkpads. Unfortunately not much is
488 * known about it, so we can't power down.
491 prep_carrera_poweroff(void)
497 * On most IBM PReP's, power management is handled by a Signetics 87c750
498 * behind the Utah component on the ISA bus. To access the 750 you must write
499 * a series of nibbles to port 0x82a (decoded by the Utah). This is described
500 * somewhat in the IBM Carolina Technical Specification.
504 utah_sig87c750_setbit(unsigned int bytenum, unsigned int bitnum, int value)
507 * byte1: 0 0 0 1 0 d a5 a4
508 * byte2: 0 0 0 1 a3 a2 a1 a0
510 * d = the bit's value, enabled or disabled
511 * (a5 a4 a3) = the byte number, minus 20
512 * (a2 a1 a0) = the bit number
514 * example: set the 5th bit of byte 21 (21.5)
515 * a5 a4 a3 = 001 (byte 1)
516 * a2 a1 a0 = 101 (bit 5)
518 * byte1 = 0001 0100 (0x14)
519 * byte2 = 0001 1101 (0x1d)
521 unsigned char byte1=0x10, byte2=0x10;
523 /* the 750's '20.0' is accessed as '0.0' through Utah (which adds 20) */
526 byte1 |= (!!value) << 2; /* set d */
527 byte1 |= (bytenum >> 1) & 0x3; /* set a5, a4 */
529 byte2 |= (bytenum & 0x1) << 3; /* set a3 */
530 byte2 |= bitnum & 0x7; /* set a2, a1, a0 */
532 outb(byte1, PREP_IBM_PM1); /* first nibble */
534 udelay(100); /* important: let controller recover */
536 outb(byte2, PREP_IBM_PM1); /* second nibble */
538 udelay(100); /* important: let controller recover */
542 prep_sig750_poweroff(void)
544 /* tweak the power manager found in most IBM PRePs (except Thinkpads) */
547 /* set exception prefix high - to the prom */
548 _nmask_and_or_msr(0, MSR_IP);
550 utah_sig87c750_setbit(21, 5, 1); /* set bit 21.5, "PMEXEC_OFF" */
557 prep_show_percpuinfo(struct seq_file *m, int i)
559 /* PREP's without residual data will give incorrect values here */
560 seq_printf(m, "clock\t\t: ");
561 if (have_residual_data)
562 seq_printf(m, "%ldMHz\n",
563 (res->VitalProductData.ProcessorHz > 1024) ?
564 res->VitalProductData.ProcessorHz / 1000000 :
565 res->VitalProductData.ProcessorHz);
567 seq_printf(m, "???\n");
572 #ifdef CONFIG_SOUND_CS4232
573 static long __init masktoint(unsigned int i)
582 * ppc_cs4232_dma and ppc_cs4232_dma2 are used in include/asm/dma.h
583 * to distinguish sound dma-channels from others. This is because
584 * blocksize on 16 bit dma-channels 5,6,7 is 128k, but
585 * the cs4232.c uses 64k like on 8 bit dma-channels 0,1,2,3
588 static void __init prep_init_sound(void)
590 PPC_DEVICE *audiodevice = NULL;
593 * Get the needed resource information from residual data.
596 if (have_residual_data)
597 audiodevice = residual_find_device(~0, NULL,
598 MultimediaController, AudioController, -1, 0);
600 if (audiodevice != NULL) {
603 pkt = PnP_find_packet((unsigned char *)&res->DevicePnPHeap[audiodevice->AllocatedOffset],
606 ppc_cs4232_dma = masktoint(pkt->S5_Pack.DMAMask);
607 pkt = PnP_find_packet((unsigned char*)&res->DevicePnPHeap[audiodevice->AllocatedOffset],
610 ppc_cs4232_dma2 = masktoint(pkt->S5_Pack.DMAMask);
614 * These are the PReP specs' defaults for the cs4231. We use these
615 * as fallback incase we don't have residual data.
616 * At least the IBM Thinkpad 850 with IDE DMA Channels at 6 and 7
617 * will use the other values.
619 if (audiodevice == NULL) {
620 switch (_prep_type) {
623 ppc_cs4232_dma2 = -1;
632 * Find a way to push this information to the cs4232 driver
633 * Give it out with printk, when not in cmd_line?
634 * Append it to cmd_line and boot_command_line?
635 * Format is cs4232=io,irq,dma,dma2
638 #endif /* CONFIG_SOUND_CS4232 */
641 * Fill out screen_info according to the residual data. This allows us to use
647 #if (defined(CONFIG_FB_VGA16) || defined(CONFIG_FB_VGA16_MODULE) || \
648 defined(CONFIG_FB_VESA))
649 PPC_DEVICE *vgadev = NULL;
651 if (have_residual_data)
652 vgadev = residual_find_device(~0, NULL, DisplayController,
653 SVGAController, -1, 0);
655 if (vgadev != NULL) {
658 pkt = PnP_find_large_vendor_packet(
659 (unsigned char *)&res->DevicePnPHeap[vgadev->AllocatedOffset],
660 0x04, 0); /* 0x04 = Display Tag */
662 unsigned char *ptr = (unsigned char *)pkt;
666 screen_info.orig_video_isVGA = VIDEO_TYPE_VLFB;
668 screen_info.lfb_depth = ptr[4] * 8;
670 screen_info.lfb_width = swab16(*(short *)(ptr+6));
671 screen_info.lfb_height = swab16(*(short *)(ptr+8));
672 screen_info.lfb_linelength = swab16(*(short *)(ptr+10));
674 screen_info.lfb_base = swab32(*(long *)(ptr+12));
675 screen_info.lfb_size = swab32(*(long *)(ptr+20)) / 65536;
683 * Set DBAT 2 to access 0x80000000 so early progress messages will work
685 static __inline__ void
688 /* wait for all outstanding memory access to complete */
692 mtspr(SPRN_DBAT2U, 0x80001ffe);
693 mtspr(SPRN_DBAT2L, 0x8000002a);
695 /* wait for updates */
700 * IBM 3-digit status LED
702 static unsigned int ibm_statusled_base;
705 ibm_statusled_progress(char *s, unsigned short hex);
708 ibm_statusled_panic(struct notifier_block *dummy1, unsigned long dummy2,
711 ibm_statusled_progress(NULL, 0x505); /* SOS */
715 static struct notifier_block ibm_statusled_block = {
718 INT_MAX /* try to do it first */
722 ibm_statusled_progress(char *s, unsigned short hex)
724 static int notifier_installed;
726 * Progress uses 4 digits and we have only 3. So, we map 0xffff to
727 * 0xfff for display switch off. Out of range values are mapped to
728 * 0xeff, as I'm told 0xf00 and above are reserved for hardware codes.
729 * Install the panic notifier when the display is first switched off.
733 if (!notifier_installed) {
734 ++notifier_installed;
735 atomic_notifier_chain_register(&panic_notifier_list,
736 &ibm_statusled_block);
744 outw(hex, ibm_statusled_base);
748 ibm_statusled_init(void)
751 * The IBM 3-digit LED display is specified in the residual data
752 * as an operator panel device, type "System Status LED". Find
753 * that device and determine its address. We validate all the
754 * other parameters on the off-chance another, similar device
757 if (have_residual_data) {
761 led = residual_find_device(~0, NULL, SystemPeripheral,
762 OperatorPanel, SystemStatusLED, 0);
766 pkt = PnP_find_packet((unsigned char *)
767 &res->DevicePnPHeap[led->AllocatedOffset], S8_Packet, 0);
771 if (pkt->S8_Pack.IOInfo != ISAAddr16bit)
773 if (*(unsigned short *)pkt->S8_Pack.RangeMin !=
774 *(unsigned short *)pkt->S8_Pack.RangeMax)
776 if (pkt->S8_Pack.IOAlign != 2)
778 if (pkt->S8_Pack.IONum != 2)
781 ibm_statusled_base = ld_le16((unsigned short *)
782 (pkt->S8_Pack.RangeMin));
783 ppc_md.progress = ibm_statusled_progress;
788 prep_setup_arch(void)
793 /* init to some ~sane value until calibrate_delay() runs */
794 loops_per_jiffy = 50000000;
796 /* Lookup PCI host bridges */
799 /* Set up floppy in PS/2 mode */
800 outb(0x09, SIO_CONFIG_RA);
801 reg = inb(SIO_CONFIG_RD);
802 reg = (reg & 0x3F) | 0x40;
803 outb(reg, SIO_CONFIG_RD);
804 outb(reg, SIO_CONFIG_RD); /* Have to write twice to change! */
806 switch ( _prep_type )
809 reg = inb(PREP_IBM_PLANAR);
810 printk(KERN_INFO "IBM planar ID: %02x", reg);
812 case PREP_IBM_SANDALFOOT:
813 prep_gen_enable_l2();
814 setup_ibm_pci = prep_sandalfoot_setup_pci;
815 ppc_md.power_off = prep_sig750_poweroff;
816 ppc_md.show_cpuinfo = prep_sandalfoot_cpuinfo;
818 case PREP_IBM_THINKPAD:
819 prep_gen_enable_l2();
820 setup_ibm_pci = prep_thinkpad_setup_pci;
821 ppc_md.power_off = prep_carrera_poweroff;
822 ppc_md.show_cpuinfo = prep_thinkpad_cpuinfo;
825 if (have_residual_data) {
826 prep_gen_enable_l2();
827 setup_ibm_pci = prep_residual_setup_pci;
828 ppc_md.power_off = prep_halt;
829 ppc_md.show_cpuinfo = prep_gen_cpuinfo;
833 printk(" - unknown! Assuming Carolina");
835 case PREP_IBM_CAROLINA_IDE_0:
836 case PREP_IBM_CAROLINA_IDE_1:
837 case PREP_IBM_CAROLINA_IDE_2:
838 case PREP_IBM_CAROLINA_IDE_3:
840 case PREP_IBM_CAROLINA_SCSI_0:
841 case PREP_IBM_CAROLINA_SCSI_1:
842 case PREP_IBM_CAROLINA_SCSI_2:
843 case PREP_IBM_CAROLINA_SCSI_3:
844 prep_carolina_enable_l2();
845 setup_ibm_pci = prep_carolina_setup_pci;
846 ppc_md.power_off = prep_sig750_poweroff;
847 ppc_md.show_cpuinfo = prep_carolina_cpuinfo;
849 case PREP_IBM_TIGER1_133:
850 case PREP_IBM_TIGER1_166:
851 case PREP_IBM_TIGER1_180:
852 case PREP_IBM_TIGER1_xxx:
853 case PREP_IBM_TIGER1_333:
854 prep_carolina_enable_l2();
855 setup_ibm_pci = prep_tiger1_setup_pci;
856 ppc_md.power_off = prep_sig750_poweroff;
857 ppc_md.show_cpuinfo = prep_tiger1_cpuinfo;
862 /* default root device */
864 ROOT_DEV = MKDEV(IDE0_MAJOR, 3);
866 ROOT_DEV = MKDEV(SCSI_DISK0_MAJOR, 3);
870 prep_gen_enable_l2();
871 ppc_md.power_off = prep_halt;
872 ppc_md.show_cpuinfo = prep_mot_cpuinfo;
874 #ifdef CONFIG_BLK_DEV_INITRD
876 ROOT_DEV = Root_RAM0;
879 #ifdef CONFIG_ROOT_NFS
882 ROOT_DEV = Root_SDA2;
887 /* Read in NVRAM data */
890 /* if no bootargs, look in NVRAM */
891 if ( cmd_line[0] == '\0' ) {
893 bootargs = prep_nvram_get_var("bootargs");
894 if (bootargs != NULL) {
895 strcpy(cmd_line, bootargs);
897 strcpy(boot_command_line, cmd_line);
901 #ifdef CONFIG_SOUND_CS4232
903 #endif /* CONFIG_SOUND_CS4232 */
907 switch (_prep_type) {
916 #ifdef CONFIG_VGA_CONSOLE
917 /* vgacon.c needs to know where we mapped IO memory in io_block_mapping() */
918 vgacon_remap_base = 0xf0000000;
919 conswitchp = &vga_con;
924 * First, see if we can get this information from the residual data.
925 * This is important on some IBM PReP systems. If we cannot, we let the
926 * TODC code handle doing this.
929 prep_calibrate_decr(void)
931 if (have_residual_data) {
932 unsigned long freq, divisor = 4;
934 if ( res->VitalProductData.ProcessorBusHz ) {
935 freq = res->VitalProductData.ProcessorBusHz;
936 printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
937 (freq/divisor)/1000000,
938 (freq/divisor)%1000000);
939 tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000);
940 tb_ticks_per_jiffy = freq / HZ / divisor;
944 todc_calibrate_decr();
950 unsigned int pci_viddid, pci_did;
952 if (OpenPIC_Addr != NULL) {
953 openpic_init(NUM_8259_INTERRUPTS);
954 /* We have a cascade on OpenPIC IRQ 0, Linux IRQ 16 */
955 openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
959 if (have_residual_data) {
960 i8259_init(residual_isapic_addr(), 0);
964 /* If we have a Raven PCI bridge or a Hawk PCI bridge / Memory
965 * controller, we poll (as they have a different int-ack address). */
966 early_read_config_dword(NULL, 0, 0, PCI_VENDOR_ID, &pci_viddid);
967 pci_did = (pci_viddid & 0xffff0000) >> 16;
968 if (((pci_viddid & 0xffff) == PCI_VENDOR_ID_MOTOROLA)
969 && ((pci_did == PCI_DEVICE_ID_MOTOROLA_RAVEN)
970 || (pci_did == PCI_DEVICE_ID_MOTOROLA_HAWK)))
973 /* PCI interrupt ack address given in section 6.1.8 of the
974 * PReP specification. */
975 i8259_init(MPC10X_MAPA_PCI_INTACK_ADDR, 0);
978 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
983 prep_ide_default_irq(unsigned long base)
986 case 0x1f0: return 13;
987 case 0x170: return 13;
988 case 0x1e8: return 11;
989 case 0x168: return 10;
990 case 0xfff0: return 14; /* MCP(N)750 ide0 */
991 case 0xffe0: return 15; /* MCP(N)750 ide1 */
997 prep_ide_default_io_base(int index)
1000 case 0: return 0x1f0;
1001 case 1: return 0x170;
1002 case 2: return 0x1e8;
1003 case 3: return 0x168;
1011 /* PReP (MTX) support */
1013 smp_prep_probe(void)
1015 extern int mot_multi;
1018 openpic_request_IPIs();
1019 smp_hw_index[1] = 1;
1027 smp_prep_kick_cpu(int nr)
1029 *(unsigned long *)KERNELBASE = nr;
1030 asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
1031 printk("CPU1 released, waiting\n");
1035 smp_prep_setup_cpu(int cpu_nr)
1038 do_openpic_setup_cpu();
1041 static struct smp_ops_t prep_smp_ops = {
1042 smp_openpic_message_pass,
1046 .give_timebase = smp_generic_give_timebase,
1047 .take_timebase = smp_generic_take_timebase,
1049 #endif /* CONFIG_SMP */
1052 * Setup the bat mappings we're going to load that cover
1053 * the io areas. RAM was mapped by mapin_ram().
1059 io_block_mapping(0x80000000, PREP_ISA_IO_BASE, 0x10000000, _PAGE_IO);
1060 io_block_mapping(0xf0000000, PREP_ISA_MEM_BASE, 0x08000000, _PAGE_IO);
1064 prep_request_io(void)
1067 request_region(PREP_NVRAM_AS0, 0x8, "nvram");
1069 request_region(0x00,0x20,"dma1");
1070 request_region(0x40,0x20,"timer");
1071 request_region(0x80,0x10,"dma page reg");
1072 request_region(0xc0,0x20,"dma2");
1077 device_initcall(prep_request_io);
1080 prep_init(unsigned long r3, unsigned long r4, unsigned long r5,
1081 unsigned long r6, unsigned long r7)
1083 #ifdef CONFIG_PREP_RESIDUAL
1084 /* make a copy of residual data */
1086 memcpy((void *)res,(void *)(r3+KERNELBASE),
1091 isa_io_base = PREP_ISA_IO_BASE;
1092 isa_mem_base = PREP_ISA_MEM_BASE;
1093 pci_dram_offset = PREP_PCI_DRAM_OFFSET;
1094 ISA_DMA_THRESHOLD = 0x00ffffff;
1095 DMA_MODE_READ = 0x44;
1096 DMA_MODE_WRITE = 0x48;
1097 ppc_do_canonicalize_irqs = 1;
1099 /* figure out what kind of prep workstation we are */
1100 if (have_residual_data) {
1101 if ( !strncmp(res->VitalProductData.PrintableModel,"IBM",3) )
1102 _prep_type = _PREP_IBM;
1104 _prep_type = _PREP_Motorola;
1107 /* assume motorola if no residual (netboot?) */
1108 _prep_type = _PREP_Motorola;
1111 #ifdef CONFIG_PREP_RESIDUAL
1112 /* Switch off all residual data processing if the user requests it */
1113 if (strstr(cmd_line, "noresidual") != NULL)
1117 /* Initialise progress early to get maximum benefit */
1119 ibm_statusled_init();
1121 ppc_md.setup_arch = prep_setup_arch;
1122 ppc_md.show_percpuinfo = prep_show_percpuinfo;
1123 ppc_md.show_cpuinfo = NULL; /* set in prep_setup_arch() */
1124 ppc_md.init_IRQ = prep_init_IRQ;
1125 /* this gets changed later on if we have an OpenPIC -- Cort */
1126 ppc_md.get_irq = i8259_irq;
1128 ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
1130 ppc_md.restart = prep_restart;
1131 ppc_md.power_off = NULL; /* set in prep_setup_arch() */
1132 ppc_md.halt = prep_halt;
1134 ppc_md.nvram_read_val = prep_nvram_read_val;
1135 ppc_md.nvram_write_val = prep_nvram_write_val;
1137 ppc_md.time_init = todc_time_init;
1138 if (_prep_type == _PREP_IBM) {
1139 ppc_md.rtc_read_val = todc_mc146818_read_val;
1140 ppc_md.rtc_write_val = todc_mc146818_write_val;
1141 TODC_INIT(TODC_TYPE_MC146818, RTC_PORT(0), NULL, RTC_PORT(1),
1144 TODC_INIT(TODC_TYPE_MK48T59, PREP_NVRAM_AS0, PREP_NVRAM_AS1,
1145 PREP_NVRAM_DATA, 8);
1148 ppc_md.calibrate_decr = prep_calibrate_decr;
1149 ppc_md.set_rtc_time = todc_set_rtc_time;
1150 ppc_md.get_rtc_time = todc_get_rtc_time;
1152 ppc_md.setup_io_mappings = prep_map_io;
1154 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
1155 ppc_ide_md.default_irq = prep_ide_default_irq;
1156 ppc_ide_md.default_io_base = prep_ide_default_io_base;
1160 smp_ops = &prep_smp_ops;
1161 #endif /* CONFIG_SMP */