2 * Copyright (c) 2000 Mike Corrigan <mikejc@us.ibm.com>
3 * Copyright (c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
5 * Module name: iSeries_setup.c
8 * Architecture- / platform-specific boot-time initialization code for
9 * the IBM iSeries LPAR. Adapted from original code by Grant Erickson and
10 * code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
21 #include <linux/config.h>
22 #include <linux/init.h>
23 #include <linux/threads.h>
24 #include <linux/smp.h>
25 #include <linux/param.h>
26 #include <linux/string.h>
27 #include <linux/bootmem.h>
28 #include <linux/initrd.h>
29 #include <linux/seq_file.h>
30 #include <linux/kdev_t.h>
31 #include <linux/major.h>
32 #include <linux/root_dev.h>
34 #include <asm/processor.h>
35 #include <asm/machdep.h>
38 #include <asm/pgtable.h>
39 #include <asm/mmu_context.h>
40 #include <asm/cputable.h>
41 #include <asm/sections.h>
42 #include <asm/iommu.h>
45 #include "iSeries_setup.h"
48 #include <asm/cache.h>
49 #include <asm/sections.h>
50 #include <asm/iSeries/LparData.h>
51 #include <asm/iSeries/HvCallHpt.h>
52 #include <asm/iSeries/HvLpConfig.h>
53 #include <asm/iSeries/HvCallEvent.h>
54 #include <asm/iSeries/HvCallSm.h>
55 #include <asm/iSeries/HvCallXm.h>
56 #include <asm/iSeries/ItLpQueue.h>
57 #include <asm/iSeries/IoHriMainStore.h>
58 #include <asm/iSeries/iSeries_proc.h>
59 #include <asm/iSeries/mf.h>
60 #include <asm/iSeries/HvLpEvent.h>
61 #include <asm/iSeries/iSeries_irq.h>
63 extern void hvlog(char *fmt, ...);
66 #define DBG(fmt...) hvlog(fmt)
71 /* Function Prototypes */
72 extern void ppcdbg_initialize(void);
74 static void build_iSeries_Memory_Map(void);
75 static void setup_iSeries_cache_sizes(void);
76 static void iSeries_bolt_kernel(unsigned long saddr, unsigned long eaddr);
77 extern void iSeries_pci_final_fixup(void);
79 /* Global Variables */
80 static unsigned long procFreqHz;
81 static unsigned long procFreqMhz;
82 static unsigned long procFreqMhzHundreths;
84 static unsigned long tbFreqHz;
85 static unsigned long tbFreqMhz;
86 static unsigned long tbFreqMhzHundreths;
88 int piranha_simulator;
90 extern int rd_size; /* Defined in drivers/block/rd.c */
91 extern unsigned long klimit;
92 extern unsigned long embedded_sysmap_start;
93 extern unsigned long embedded_sysmap_end;
95 extern unsigned long iSeries_recal_tb;
96 extern unsigned long iSeries_recal_titan;
98 static int mf_initialized;
101 unsigned long absStart;
102 unsigned long absEnd;
103 unsigned long logicalStart;
104 unsigned long logicalEnd;
108 * Process the main store vpd to determine where the holes in memory are
109 * and return the number of physical blocks and fill in the array of
112 static unsigned long iSeries_process_Condor_mainstore_vpd(
113 struct MemoryBlock *mb_array, unsigned long max_entries)
115 unsigned long holeFirstChunk, holeSizeChunks;
116 unsigned long numMemoryBlocks = 1;
117 struct IoHriMainStoreSegment4 *msVpd =
118 (struct IoHriMainStoreSegment4 *)xMsVpd;
119 unsigned long holeStart = msVpd->nonInterleavedBlocksStartAdr;
120 unsigned long holeEnd = msVpd->nonInterleavedBlocksEndAdr;
121 unsigned long holeSize = holeEnd - holeStart;
123 printk("Mainstore_VPD: Condor\n");
125 * Determine if absolute memory has any
126 * holes so that we can interpret the
127 * access map we get back from the hypervisor
130 mb_array[0].logicalStart = 0;
131 mb_array[0].logicalEnd = 0x100000000;
132 mb_array[0].absStart = 0;
133 mb_array[0].absEnd = 0x100000000;
137 holeStart = holeStart & 0x000fffffffffffff;
138 holeStart = addr_to_chunk(holeStart);
139 holeFirstChunk = holeStart;
140 holeSize = addr_to_chunk(holeSize);
141 holeSizeChunks = holeSize;
142 printk( "Main store hole: start chunk = %0lx, size = %0lx chunks\n",
143 holeFirstChunk, holeSizeChunks );
144 mb_array[0].logicalEnd = holeFirstChunk;
145 mb_array[0].absEnd = holeFirstChunk;
146 mb_array[1].logicalStart = holeFirstChunk;
147 mb_array[1].logicalEnd = 0x100000000 - holeSizeChunks;
148 mb_array[1].absStart = holeFirstChunk + holeSizeChunks;
149 mb_array[1].absEnd = 0x100000000;
151 return numMemoryBlocks;
154 #define MaxSegmentAreas 32
155 #define MaxSegmentAdrRangeBlocks 128
156 #define MaxAreaRangeBlocks 4
158 static unsigned long iSeries_process_Regatta_mainstore_vpd(
159 struct MemoryBlock *mb_array, unsigned long max_entries)
161 struct IoHriMainStoreSegment5 *msVpdP =
162 (struct IoHriMainStoreSegment5 *)xMsVpd;
163 unsigned long numSegmentBlocks = 0;
164 u32 existsBits = msVpdP->msAreaExists;
165 unsigned long area_num;
167 printk("Mainstore_VPD: Regatta\n");
169 for (area_num = 0; area_num < MaxSegmentAreas; ++area_num ) {
170 unsigned long numAreaBlocks;
171 struct IoHriMainStoreArea4 *currentArea;
173 if (existsBits & 0x80000000) {
174 unsigned long block_num;
176 currentArea = &msVpdP->msAreaArray[area_num];
177 numAreaBlocks = currentArea->numAdrRangeBlocks;
178 printk("ms_vpd: processing area %2ld blocks=%ld",
179 area_num, numAreaBlocks);
180 for (block_num = 0; block_num < numAreaBlocks;
182 /* Process an address range block */
183 struct MemoryBlock tempBlock;
187 (unsigned long)currentArea->xAdrRangeBlock[block_num].blockStart;
189 (unsigned long)currentArea->xAdrRangeBlock[block_num].blockEnd;
190 tempBlock.logicalStart = 0;
191 tempBlock.logicalEnd = 0;
192 printk("\n block %ld absStart=%016lx absEnd=%016lx",
193 block_num, tempBlock.absStart,
196 for (i = 0; i < numSegmentBlocks; ++i) {
197 if (mb_array[i].absStart ==
201 if (i == numSegmentBlocks) {
202 if (numSegmentBlocks == max_entries)
203 panic("iSeries_process_mainstore_vpd: too many memory blocks");
204 mb_array[numSegmentBlocks] = tempBlock;
207 printk(" (duplicate)");
213 /* Now sort the blocks found into ascending sequence */
214 if (numSegmentBlocks > 1) {
217 for (m = 0; m < numSegmentBlocks - 1; ++m) {
218 for (n = numSegmentBlocks - 1; m < n; --n) {
219 if (mb_array[n].absStart <
220 mb_array[n-1].absStart) {
221 struct MemoryBlock tempBlock;
223 tempBlock = mb_array[n];
224 mb_array[n] = mb_array[n-1];
225 mb_array[n-1] = tempBlock;
231 * Assign "logical" addresses to each block. These
232 * addresses correspond to the hypervisor "bitmap" space.
233 * Convert all addresses into units of 256K chunks.
236 unsigned long i, nextBitmapAddress;
238 printk("ms_vpd: %ld sorted memory blocks\n", numSegmentBlocks);
239 nextBitmapAddress = 0;
240 for (i = 0; i < numSegmentBlocks; ++i) {
241 unsigned long length = mb_array[i].absEnd -
242 mb_array[i].absStart;
244 mb_array[i].logicalStart = nextBitmapAddress;
245 mb_array[i].logicalEnd = nextBitmapAddress + length;
246 nextBitmapAddress += length;
247 printk(" Bitmap range: %016lx - %016lx\n"
248 " Absolute range: %016lx - %016lx\n",
249 mb_array[i].logicalStart,
250 mb_array[i].logicalEnd,
251 mb_array[i].absStart, mb_array[i].absEnd);
252 mb_array[i].absStart = addr_to_chunk(mb_array[i].absStart &
254 mb_array[i].absEnd = addr_to_chunk(mb_array[i].absEnd &
256 mb_array[i].logicalStart =
257 addr_to_chunk(mb_array[i].logicalStart);
258 mb_array[i].logicalEnd = addr_to_chunk(mb_array[i].logicalEnd);
262 return numSegmentBlocks;
265 static unsigned long iSeries_process_mainstore_vpd(struct MemoryBlock *mb_array,
266 unsigned long max_entries)
269 unsigned long mem_blocks = 0;
271 if (cpu_has_feature(CPU_FTR_SLB))
272 mem_blocks = iSeries_process_Regatta_mainstore_vpd(mb_array,
275 mem_blocks = iSeries_process_Condor_mainstore_vpd(mb_array,
278 printk("Mainstore_VPD: numMemoryBlocks = %ld \n", mem_blocks);
279 for (i = 0; i < mem_blocks; ++i) {
280 printk("Mainstore_VPD: block %3ld logical chunks %016lx - %016lx\n"
281 " abs chunks %016lx - %016lx\n",
282 i, mb_array[i].logicalStart, mb_array[i].logicalEnd,
283 mb_array[i].absStart, mb_array[i].absEnd);
288 static void __init iSeries_get_cmdline(void)
292 /* copy the command line parameter from the primary VSP */
293 HvCallEvent_dmaToSp(cmd_line, 2 * 64* 1024, 256,
294 HvLpDma_Direction_RemoteToLocal);
299 if (!*p || *p == '\n')
306 static void __init iSeries_init_early(void)
308 extern unsigned long memory_limit;
310 DBG(" -> iSeries_init_early()\n");
314 #if defined(CONFIG_BLK_DEV_INITRD)
316 * If the init RAM disk has been configured and there is
317 * a non-zero starting address for it, set it up
320 initrd_start = (unsigned long)__va(naca.xRamDisk);
321 initrd_end = initrd_start + naca.xRamDiskSize * PAGE_SIZE;
322 initrd_below_start_ok = 1; // ramdisk in kernel space
323 ROOT_DEV = Root_RAM0;
324 if (((rd_size * 1024) / PAGE_SIZE) < naca.xRamDiskSize)
325 rd_size = (naca.xRamDiskSize * PAGE_SIZE) / 1024;
327 #endif /* CONFIG_BLK_DEV_INITRD */
329 /* ROOT_DEV = MKDEV(VIODASD_MAJOR, 1); */
332 iSeries_recal_tb = get_tb();
333 iSeries_recal_titan = HvCallXm_loadTod();
336 * Cache sizes must be initialized before hpte_init_iSeries is called
337 * as the later need them for flush_icache_range()
339 setup_iSeries_cache_sizes();
342 * Initialize the hash table management pointers
347 * Initialize the DMA/TCE management
349 iommu_init_early_iSeries();
352 * Initialize the table which translate Linux physical addresses to
353 * AS/400 absolute addresses
355 build_iSeries_Memory_Map();
357 iSeries_get_cmdline();
359 /* Save unparsed command line copy for /proc/cmdline */
360 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
362 /* Parse early parameters, in particular mem=x */
366 if (memory_limit < systemcfg->physicalMemorySize)
367 systemcfg->physicalMemorySize = memory_limit;
369 printk("Ignoring mem=%lu >= ram_top.\n", memory_limit);
374 /* Bolt kernel mappings for all of memory (or just a bit if we've got a limit) */
375 iSeries_bolt_kernel(0, systemcfg->physicalMemorySize);
378 lmb_add(0, systemcfg->physicalMemorySize);
380 lmb_reserve(0, __pa(klimit));
382 /* Initialize machine-dependency vectors */
386 if (itLpNaca.xPirEnvironMode == 0)
387 piranha_simulator = 1;
389 /* Associate Lp Event Queue 0 with processor 0 */
390 HvCallEvent_setLpEventQueueInterruptProc(0, 0);
396 /* If we were passed an initrd, set the ROOT_DEV properly if the values
397 * look sensible. If not, clear initrd reference.
399 #ifdef CONFIG_BLK_DEV_INITRD
400 if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
401 initrd_end > initrd_start)
402 ROOT_DEV = Root_RAM0;
404 initrd_start = initrd_end = 0;
405 #endif /* CONFIG_BLK_DEV_INITRD */
407 DBG(" <- iSeries_init_early()\n");
411 * The iSeries may have very large memories ( > 128 GB ) and a partition
412 * may get memory in "chunks" that may be anywhere in the 2**52 real
413 * address space. The chunks are 256K in size. To map this to the
414 * memory model Linux expects, the AS/400 specific code builds a
415 * translation table to translate what Linux thinks are "physical"
416 * addresses to the actual real addresses. This allows us to make
417 * it appear to Linux that we have contiguous memory starting at
418 * physical address zero while in fact this could be far from the truth.
419 * To avoid confusion, I'll let the words physical and/or real address
420 * apply to the Linux addresses while I'll use "absolute address" to
421 * refer to the actual hardware real address.
423 * build_iSeries_Memory_Map gets information from the Hypervisor and
424 * looks at the Main Store VPD to determine the absolute addresses
425 * of the memory that has been assigned to our partition and builds
426 * a table used to translate Linux's physical addresses to these
427 * absolute addresses. Absolute addresses are needed when
428 * communicating with the hypervisor (e.g. to build HPT entries)
431 static void __init build_iSeries_Memory_Map(void)
433 u32 loadAreaFirstChunk, loadAreaLastChunk, loadAreaSize;
435 u32 hptFirstChunk, hptLastChunk, hptSizeChunks, hptSizePages;
437 u32 totalChunks,moreChunks;
438 u32 currChunk, thisChunk, absChunk;
442 struct MemoryBlock mb[32];
443 unsigned long numMemoryBlocks, curBlock;
445 /* Chunk size on iSeries is 256K bytes */
446 totalChunks = (u32)HvLpConfig_getMsChunks();
447 klimit = msChunks_alloc(klimit, totalChunks, 1UL << 18);
450 * Get absolute address of our load area
451 * and map it to physical address 0
452 * This guarantees that the loadarea ends up at physical 0
453 * otherwise, it might not be returned by PLIC as the first
457 loadAreaFirstChunk = (u32)addr_to_chunk(itLpNaca.xLoadAreaAddr);
458 loadAreaSize = itLpNaca.xLoadAreaChunks;
461 * Only add the pages already mapped here.
462 * Otherwise we might add the hpt pages
463 * The rest of the pages of the load area
464 * aren't in the HPT yet and can still
465 * be assigned an arbitrary physical address
467 if ((loadAreaSize * 64) > HvPagesToMap)
468 loadAreaSize = HvPagesToMap / 64;
470 loadAreaLastChunk = loadAreaFirstChunk + loadAreaSize - 1;
473 * TODO Do we need to do something if the HPT is in the 64MB load area?
474 * This would be required if the itLpNaca.xLoadAreaChunks includes
478 printk("Mapping load area - physical addr = 0000000000000000\n"
479 " absolute addr = %016lx\n",
480 chunk_to_addr(loadAreaFirstChunk));
481 printk("Load area size %dK\n", loadAreaSize * 256);
483 for (nextPhysChunk = 0; nextPhysChunk < loadAreaSize; ++nextPhysChunk)
484 msChunks.abs[nextPhysChunk] =
485 loadAreaFirstChunk + nextPhysChunk;
488 * Get absolute address of our HPT and remember it so
489 * we won't map it to any physical address
491 hptFirstChunk = (u32)addr_to_chunk(HvCallHpt_getHptAddress());
492 hptSizePages = (u32)HvCallHpt_getHptPages();
493 hptSizeChunks = hptSizePages >> (msChunks.chunk_shift - PAGE_SHIFT);
494 hptLastChunk = hptFirstChunk + hptSizeChunks - 1;
496 printk("HPT absolute addr = %016lx, size = %dK\n",
497 chunk_to_addr(hptFirstChunk), hptSizeChunks * 256);
499 /* Fill in the hashed page table hash mask */
500 num_ptegs = hptSizePages *
501 (PAGE_SIZE / (sizeof(HPTE) * HPTES_PER_GROUP));
502 htab_hash_mask = num_ptegs - 1;
505 * The actual hashed page table is in the hypervisor,
506 * we have no direct access
511 * Determine if absolute memory has any
512 * holes so that we can interpret the
513 * access map we get back from the hypervisor
516 numMemoryBlocks = iSeries_process_mainstore_vpd(mb, 32);
519 * Process the main store access map from the hypervisor
520 * to build up our physical -> absolute translation table
525 moreChunks = totalChunks;
528 map = HvCallSm_get64BitsOfAccessMap(itLpNaca.xLpIndex,
530 thisChunk = currChunk;
532 chunkBit = map >> 63;
536 while (thisChunk >= mb[curBlock].logicalEnd) {
538 if (curBlock >= numMemoryBlocks)
539 panic("out of memory blocks");
541 if (thisChunk < mb[curBlock].logicalStart)
542 panic("memory block error");
544 absChunk = mb[curBlock].absStart +
545 (thisChunk - mb[curBlock].logicalStart);
546 if (((absChunk < hptFirstChunk) ||
547 (absChunk > hptLastChunk)) &&
548 ((absChunk < loadAreaFirstChunk) ||
549 (absChunk > loadAreaLastChunk))) {
550 msChunks.abs[nextPhysChunk] = absChunk;
561 * main store size (in chunks) is
562 * totalChunks - hptSizeChunks
563 * which should be equal to
566 systemcfg->physicalMemorySize = chunk_to_addr(nextPhysChunk);
570 * Set up the variables that describe the cache line sizes
573 static void __init setup_iSeries_cache_sizes(void)
576 unsigned int procIx = get_paca()->lppaca.dyn_hv_phys_proc_index;
578 systemcfg->icache_size =
579 ppc64_caches.isize = xIoHriProcessorVpd[procIx].xInstCacheSize * 1024;
580 systemcfg->icache_line_size =
581 ppc64_caches.iline_size =
582 xIoHriProcessorVpd[procIx].xInstCacheOperandSize;
583 systemcfg->dcache_size =
585 xIoHriProcessorVpd[procIx].xDataL1CacheSizeKB * 1024;
586 systemcfg->dcache_line_size =
587 ppc64_caches.dline_size =
588 xIoHriProcessorVpd[procIx].xDataCacheOperandSize;
589 ppc64_caches.ilines_per_page = PAGE_SIZE / ppc64_caches.iline_size;
590 ppc64_caches.dlines_per_page = PAGE_SIZE / ppc64_caches.dline_size;
592 i = ppc64_caches.iline_size;
594 while ((i = (i / 2)))
596 ppc64_caches.log_iline_size = n;
598 i = ppc64_caches.dline_size;
600 while ((i = (i / 2)))
602 ppc64_caches.log_dline_size = n;
604 printk("D-cache line size = %d\n",
605 (unsigned int)ppc64_caches.dline_size);
606 printk("I-cache line size = %d\n",
607 (unsigned int)ppc64_caches.iline_size);
611 * Create a pte. Used during initialization only.
613 static void iSeries_make_pte(unsigned long va, unsigned long pa,
616 HPTE local_hpte, rhpte;
617 unsigned long hash, vpn;
620 vpn = va >> PAGE_SHIFT;
621 hash = hpt_hash(vpn, 0);
623 local_hpte.dw1.dword1 = pa | mode;
624 local_hpte.dw0.dword0 = 0;
625 local_hpte.dw0.dw0.avpn = va >> 23;
626 local_hpte.dw0.dw0.bolted = 1; /* bolted */
627 local_hpte.dw0.dw0.v = 1;
629 slot = HvCallHpt_findValid(&rhpte, vpn);
631 /* Must find space in primary group */
632 panic("hash_page: hpte already exists\n");
634 HvCallHpt_addValidate(slot, 0, (HPTE *)&local_hpte );
638 * Bolt the kernel addr space into the HPT
640 static void __init iSeries_bolt_kernel(unsigned long saddr, unsigned long eaddr)
643 unsigned long mode_rw = _PAGE_ACCESSED | _PAGE_COHERENT | PP_RWXX;
646 for (pa = saddr; pa < eaddr ;pa += PAGE_SIZE) {
647 unsigned long ea = (unsigned long)__va(pa);
648 unsigned long vsid = get_kernel_vsid(ea);
649 unsigned long va = (vsid << 28) | (pa & 0xfffffff);
650 unsigned long vpn = va >> PAGE_SHIFT;
651 unsigned long slot = HvCallHpt_findValid(&hpte, vpn);
653 /* Make non-kernel text non-executable */
654 if (!in_kernel_text(ea))
655 mode_rw |= HW_NO_EXEC;
657 if (hpte.dw0.dw0.v) {
658 /* HPTE exists, so just bolt it */
659 HvCallHpt_setSwBits(slot, 0x10, 0);
660 /* And make sure the pp bits are correct */
661 HvCallHpt_setPp(slot, PP_RWXX);
663 /* No HPTE exists, so create a new bolted one */
664 iSeries_make_pte(va, phys_to_abs(pa), mode_rw);
668 extern unsigned long ppc_proc_freq;
669 extern unsigned long ppc_tb_freq;
674 static void __init iSeries_setup_arch(void)
677 unsigned procIx = get_paca()->lppaca.dyn_hv_phys_proc_index;
679 /* Add an eye catcher and the systemcfg layout version number */
680 strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64");
681 systemcfg->version.major = SYSTEMCFG_MAJOR;
682 systemcfg->version.minor = SYSTEMCFG_MINOR;
684 /* Setup the Lp Event Queue */
686 /* Allocate a page for the Event Stack
687 * The hypervisor wants the absolute real address, so
688 * we subtract out the KERNELBASE and add in the
689 * absolute real address of the kernel load area
691 eventStack = alloc_bootmem_pages(LpEventStackSize);
692 memset(eventStack, 0, LpEventStackSize);
694 /* Invoke the hypervisor to initialize the event stack */
695 HvCallEvent_setLpEventStack(0, eventStack, LpEventStackSize);
697 /* Initialize fields in our Lp Event Queue */
698 xItLpQueue.xSlicEventStackPtr = (char *)eventStack;
699 xItLpQueue.xSlicCurEventPtr = (char *)eventStack;
700 xItLpQueue.xSlicLastValidEventPtr = (char *)eventStack +
701 (LpEventStackSize - LpEventMaxSize);
702 xItLpQueue.xIndex = 0;
704 /* Compute processor frequency */
705 procFreqHz = ((1UL << 34) * 1000000) /
706 xIoHriProcessorVpd[procIx].xProcFreq;
707 procFreqMhz = procFreqHz / 1000000;
708 procFreqMhzHundreths = (procFreqHz / 10000) - (procFreqMhz * 100);
709 ppc_proc_freq = procFreqHz;
711 /* Compute time base frequency */
712 tbFreqHz = ((1UL << 32) * 1000000) /
713 xIoHriProcessorVpd[procIx].xTimeBaseFreq;
714 tbFreqMhz = tbFreqHz / 1000000;
715 tbFreqMhzHundreths = (tbFreqHz / 10000) - (tbFreqMhz * 100);
716 ppc_tb_freq = tbFreqHz;
718 printk("Max logical processors = %d\n",
719 itVpdAreas.xSlicMaxLogicalProcs);
720 printk("Max physical processors = %d\n",
721 itVpdAreas.xSlicMaxPhysicalProcs);
722 printk("Processor frequency = %lu.%02lu\n", procFreqMhz,
723 procFreqMhzHundreths);
724 printk("Time base frequency = %lu.%02lu\n", tbFreqMhz,
726 systemcfg->processor = xIoHriProcessorVpd[procIx].xPVR;
727 printk("Processor version = %x\n", systemcfg->processor);
730 static void iSeries_get_cpuinfo(struct seq_file *m)
732 seq_printf(m, "machine\t\t: 64-bit iSeries Logical Partition\n");
739 static int iSeries_get_irq(struct pt_regs *regs)
741 /* -2 means ignore this interrupt */
748 static void iSeries_restart(char *cmd)
756 static void iSeries_power_off(void)
764 static void iSeries_halt(void)
769 extern void setup_default_decr(void);
772 * void __init iSeries_calibrate_decr()
775 * This routine retrieves the internal processor frequency from the VPD,
776 * and sets up the kernel timer decrementer based on that value.
779 static void __init iSeries_calibrate_decr(void)
781 unsigned long cyclesPerUsec;
782 struct div_result divres;
784 /* Compute decrementer (and TB) frequency in cycles/sec */
785 cyclesPerUsec = ppc_tb_freq / 1000000;
788 * Set the amount to refresh the decrementer by. This
789 * is the number of decrementer ticks it takes for
792 tb_ticks_per_jiffy = ppc_tb_freq / HZ;
795 /* TEST CODE FOR ADJTIME */
796 tb_ticks_per_jiffy += tb_ticks_per_jiffy / 5000;
797 /* END OF TEST CODE */
801 * tb_ticks_per_sec = freq; would give better accuracy
802 * but tb_ticks_per_sec = tb_ticks_per_jiffy*HZ; assures
803 * that jiffies (and xtime) will match the time returned
804 * by do_gettimeofday.
806 tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
807 tb_ticks_per_usec = cyclesPerUsec;
808 tb_to_us = mulhwu_scale_factor(ppc_tb_freq, 1000000);
809 div128_by_32(1024 * 1024, 0, tb_ticks_per_sec, &divres);
810 tb_to_xs = divres.result_low;
811 setup_default_decr();
814 static void __init iSeries_progress(char * st, unsigned short code)
816 printk("Progress: [%04x] - %s\n", (unsigned)code, st);
817 if (!piranha_simulator && mf_initialized) {
819 mf_display_progress(code);
825 static void __init iSeries_fixup_klimit(void)
828 * Change klimit to take into account any ram disk
829 * that may be included
832 klimit = KERNELBASE + (u64)naca.xRamDisk +
833 (naca.xRamDiskSize * PAGE_SIZE);
836 * No ram disk was included - check and see if there
837 * was an embedded system map. Change klimit to take
838 * into account any embedded system map
840 if (embedded_sysmap_end)
841 klimit = KERNELBASE + ((embedded_sysmap_end + 4095) &
846 static int __init iSeries_src_init(void)
848 /* clear the progress line */
849 ppc_md.progress(" ", 0xffff);
853 late_initcall(iSeries_src_init);
855 static int set_spread_lpevents(char *str)
858 unsigned long val = simple_strtoul(str, NULL, 0);
861 * The parameter is the number of processors to share in processing
864 if (( val > 0) && (val <= NR_CPUS)) {
865 for (i = 1; i < val; ++i)
866 paca[i].lpqueue_ptr = paca[0].lpqueue_ptr;
868 printk("lpevent processing spread over %ld processors\n", val);
870 printk("invalid spread_lpevents %ld\n", val);
875 __setup("spread_lpevents=", set_spread_lpevents);
877 void __init iSeries_early_setup(void)
879 iSeries_fixup_klimit();
881 ppc_md.setup_arch = iSeries_setup_arch;
882 ppc_md.get_cpuinfo = iSeries_get_cpuinfo;
883 ppc_md.init_IRQ = iSeries_init_IRQ;
884 ppc_md.get_irq = iSeries_get_irq;
885 ppc_md.init_early = iSeries_init_early,
887 ppc_md.pcibios_fixup = iSeries_pci_final_fixup;
889 ppc_md.restart = iSeries_restart;
890 ppc_md.power_off = iSeries_power_off;
891 ppc_md.halt = iSeries_halt;
893 ppc_md.get_boot_time = iSeries_get_boot_time;
894 ppc_md.set_rtc_time = iSeries_set_rtc_time;
895 ppc_md.get_rtc_time = iSeries_get_rtc_time;
896 ppc_md.calibrate_decr = iSeries_calibrate_decr;
897 ppc_md.progress = iSeries_progress;