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/mf.h>
59 #include <asm/iSeries/HvLpEvent.h>
60 #include <asm/iSeries/iSeries_irq.h>
62 extern void hvlog(char *fmt, ...);
65 #define DBG(fmt...) hvlog(fmt)
70 /* Function Prototypes */
71 extern void ppcdbg_initialize(void);
73 static void build_iSeries_Memory_Map(void);
74 static void setup_iSeries_cache_sizes(void);
75 static void iSeries_bolt_kernel(unsigned long saddr, unsigned long eaddr);
76 extern void iSeries_pci_final_fixup(void);
78 /* Global Variables */
79 static unsigned long procFreqHz;
80 static unsigned long procFreqMhz;
81 static unsigned long procFreqMhzHundreths;
83 static unsigned long tbFreqHz;
84 static unsigned long tbFreqMhz;
85 static unsigned long tbFreqMhzHundreths;
87 int piranha_simulator;
89 extern int rd_size; /* Defined in drivers/block/rd.c */
90 extern unsigned long klimit;
91 extern unsigned long embedded_sysmap_start;
92 extern unsigned long embedded_sysmap_end;
94 extern unsigned long iSeries_recal_tb;
95 extern unsigned long iSeries_recal_titan;
97 static int mf_initialized;
100 unsigned long absStart;
101 unsigned long absEnd;
102 unsigned long logicalStart;
103 unsigned long logicalEnd;
107 * Process the main store vpd to determine where the holes in memory are
108 * and return the number of physical blocks and fill in the array of
111 static unsigned long iSeries_process_Condor_mainstore_vpd(
112 struct MemoryBlock *mb_array, unsigned long max_entries)
114 unsigned long holeFirstChunk, holeSizeChunks;
115 unsigned long numMemoryBlocks = 1;
116 struct IoHriMainStoreSegment4 *msVpd =
117 (struct IoHriMainStoreSegment4 *)xMsVpd;
118 unsigned long holeStart = msVpd->nonInterleavedBlocksStartAdr;
119 unsigned long holeEnd = msVpd->nonInterleavedBlocksEndAdr;
120 unsigned long holeSize = holeEnd - holeStart;
122 printk("Mainstore_VPD: Condor\n");
124 * Determine if absolute memory has any
125 * holes so that we can interpret the
126 * access map we get back from the hypervisor
129 mb_array[0].logicalStart = 0;
130 mb_array[0].logicalEnd = 0x100000000;
131 mb_array[0].absStart = 0;
132 mb_array[0].absEnd = 0x100000000;
136 holeStart = holeStart & 0x000fffffffffffff;
137 holeStart = addr_to_chunk(holeStart);
138 holeFirstChunk = holeStart;
139 holeSize = addr_to_chunk(holeSize);
140 holeSizeChunks = holeSize;
141 printk( "Main store hole: start chunk = %0lx, size = %0lx chunks\n",
142 holeFirstChunk, holeSizeChunks );
143 mb_array[0].logicalEnd = holeFirstChunk;
144 mb_array[0].absEnd = holeFirstChunk;
145 mb_array[1].logicalStart = holeFirstChunk;
146 mb_array[1].logicalEnd = 0x100000000 - holeSizeChunks;
147 mb_array[1].absStart = holeFirstChunk + holeSizeChunks;
148 mb_array[1].absEnd = 0x100000000;
150 return numMemoryBlocks;
153 #define MaxSegmentAreas 32
154 #define MaxSegmentAdrRangeBlocks 128
155 #define MaxAreaRangeBlocks 4
157 static unsigned long iSeries_process_Regatta_mainstore_vpd(
158 struct MemoryBlock *mb_array, unsigned long max_entries)
160 struct IoHriMainStoreSegment5 *msVpdP =
161 (struct IoHriMainStoreSegment5 *)xMsVpd;
162 unsigned long numSegmentBlocks = 0;
163 u32 existsBits = msVpdP->msAreaExists;
164 unsigned long area_num;
166 printk("Mainstore_VPD: Regatta\n");
168 for (area_num = 0; area_num < MaxSegmentAreas; ++area_num ) {
169 unsigned long numAreaBlocks;
170 struct IoHriMainStoreArea4 *currentArea;
172 if (existsBits & 0x80000000) {
173 unsigned long block_num;
175 currentArea = &msVpdP->msAreaArray[area_num];
176 numAreaBlocks = currentArea->numAdrRangeBlocks;
177 printk("ms_vpd: processing area %2ld blocks=%ld",
178 area_num, numAreaBlocks);
179 for (block_num = 0; block_num < numAreaBlocks;
181 /* Process an address range block */
182 struct MemoryBlock tempBlock;
186 (unsigned long)currentArea->xAdrRangeBlock[block_num].blockStart;
188 (unsigned long)currentArea->xAdrRangeBlock[block_num].blockEnd;
189 tempBlock.logicalStart = 0;
190 tempBlock.logicalEnd = 0;
191 printk("\n block %ld absStart=%016lx absEnd=%016lx",
192 block_num, tempBlock.absStart,
195 for (i = 0; i < numSegmentBlocks; ++i) {
196 if (mb_array[i].absStart ==
200 if (i == numSegmentBlocks) {
201 if (numSegmentBlocks == max_entries)
202 panic("iSeries_process_mainstore_vpd: too many memory blocks");
203 mb_array[numSegmentBlocks] = tempBlock;
206 printk(" (duplicate)");
212 /* Now sort the blocks found into ascending sequence */
213 if (numSegmentBlocks > 1) {
216 for (m = 0; m < numSegmentBlocks - 1; ++m) {
217 for (n = numSegmentBlocks - 1; m < n; --n) {
218 if (mb_array[n].absStart <
219 mb_array[n-1].absStart) {
220 struct MemoryBlock tempBlock;
222 tempBlock = mb_array[n];
223 mb_array[n] = mb_array[n-1];
224 mb_array[n-1] = tempBlock;
230 * Assign "logical" addresses to each block. These
231 * addresses correspond to the hypervisor "bitmap" space.
232 * Convert all addresses into units of 256K chunks.
235 unsigned long i, nextBitmapAddress;
237 printk("ms_vpd: %ld sorted memory blocks\n", numSegmentBlocks);
238 nextBitmapAddress = 0;
239 for (i = 0; i < numSegmentBlocks; ++i) {
240 unsigned long length = mb_array[i].absEnd -
241 mb_array[i].absStart;
243 mb_array[i].logicalStart = nextBitmapAddress;
244 mb_array[i].logicalEnd = nextBitmapAddress + length;
245 nextBitmapAddress += length;
246 printk(" Bitmap range: %016lx - %016lx\n"
247 " Absolute range: %016lx - %016lx\n",
248 mb_array[i].logicalStart,
249 mb_array[i].logicalEnd,
250 mb_array[i].absStart, mb_array[i].absEnd);
251 mb_array[i].absStart = addr_to_chunk(mb_array[i].absStart &
253 mb_array[i].absEnd = addr_to_chunk(mb_array[i].absEnd &
255 mb_array[i].logicalStart =
256 addr_to_chunk(mb_array[i].logicalStart);
257 mb_array[i].logicalEnd = addr_to_chunk(mb_array[i].logicalEnd);
261 return numSegmentBlocks;
264 static unsigned long iSeries_process_mainstore_vpd(struct MemoryBlock *mb_array,
265 unsigned long max_entries)
268 unsigned long mem_blocks = 0;
270 if (cpu_has_feature(CPU_FTR_SLB))
271 mem_blocks = iSeries_process_Regatta_mainstore_vpd(mb_array,
274 mem_blocks = iSeries_process_Condor_mainstore_vpd(mb_array,
277 printk("Mainstore_VPD: numMemoryBlocks = %ld \n", mem_blocks);
278 for (i = 0; i < mem_blocks; ++i) {
279 printk("Mainstore_VPD: block %3ld logical chunks %016lx - %016lx\n"
280 " abs chunks %016lx - %016lx\n",
281 i, mb_array[i].logicalStart, mb_array[i].logicalEnd,
282 mb_array[i].absStart, mb_array[i].absEnd);
287 static void __init iSeries_get_cmdline(void)
291 /* copy the command line parameter from the primary VSP */
292 HvCallEvent_dmaToSp(cmd_line, 2 * 64* 1024, 256,
293 HvLpDma_Direction_RemoteToLocal);
298 if (!*p || *p == '\n')
305 static void __init iSeries_init_early(void)
307 extern unsigned long memory_limit;
309 DBG(" -> iSeries_init_early()\n");
313 #if defined(CONFIG_BLK_DEV_INITRD)
315 * If the init RAM disk has been configured and there is
316 * a non-zero starting address for it, set it up
319 initrd_start = (unsigned long)__va(naca.xRamDisk);
320 initrd_end = initrd_start + naca.xRamDiskSize * PAGE_SIZE;
321 initrd_below_start_ok = 1; // ramdisk in kernel space
322 ROOT_DEV = Root_RAM0;
323 if (((rd_size * 1024) / PAGE_SIZE) < naca.xRamDiskSize)
324 rd_size = (naca.xRamDiskSize * PAGE_SIZE) / 1024;
326 #endif /* CONFIG_BLK_DEV_INITRD */
328 /* ROOT_DEV = MKDEV(VIODASD_MAJOR, 1); */
331 iSeries_recal_tb = get_tb();
332 iSeries_recal_titan = HvCallXm_loadTod();
335 * Cache sizes must be initialized before hpte_init_iSeries is called
336 * as the later need them for flush_icache_range()
338 setup_iSeries_cache_sizes();
341 * Initialize the hash table management pointers
346 * Initialize the DMA/TCE management
348 iommu_init_early_iSeries();
351 * Initialize the table which translate Linux physical addresses to
352 * AS/400 absolute addresses
354 build_iSeries_Memory_Map();
356 iSeries_get_cmdline();
358 /* Save unparsed command line copy for /proc/cmdline */
359 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
361 /* Parse early parameters, in particular mem=x */
365 if (memory_limit < systemcfg->physicalMemorySize)
366 systemcfg->physicalMemorySize = memory_limit;
368 printk("Ignoring mem=%lu >= ram_top.\n", memory_limit);
373 /* Bolt kernel mappings for all of memory (or just a bit if we've got a limit) */
374 iSeries_bolt_kernel(0, systemcfg->physicalMemorySize);
377 lmb_add(0, systemcfg->physicalMemorySize);
379 lmb_reserve(0, __pa(klimit));
381 /* Initialize machine-dependency vectors */
385 if (itLpNaca.xPirEnvironMode == 0)
386 piranha_simulator = 1;
388 /* Associate Lp Event Queue 0 with processor 0 */
389 HvCallEvent_setLpEventQueueInterruptProc(0, 0);
395 /* If we were passed an initrd, set the ROOT_DEV properly if the values
396 * look sensible. If not, clear initrd reference.
398 #ifdef CONFIG_BLK_DEV_INITRD
399 if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
400 initrd_end > initrd_start)
401 ROOT_DEV = Root_RAM0;
403 initrd_start = initrd_end = 0;
404 #endif /* CONFIG_BLK_DEV_INITRD */
406 DBG(" <- iSeries_init_early()\n");
410 * The iSeries may have very large memories ( > 128 GB ) and a partition
411 * may get memory in "chunks" that may be anywhere in the 2**52 real
412 * address space. The chunks are 256K in size. To map this to the
413 * memory model Linux expects, the AS/400 specific code builds a
414 * translation table to translate what Linux thinks are "physical"
415 * addresses to the actual real addresses. This allows us to make
416 * it appear to Linux that we have contiguous memory starting at
417 * physical address zero while in fact this could be far from the truth.
418 * To avoid confusion, I'll let the words physical and/or real address
419 * apply to the Linux addresses while I'll use "absolute address" to
420 * refer to the actual hardware real address.
422 * build_iSeries_Memory_Map gets information from the Hypervisor and
423 * looks at the Main Store VPD to determine the absolute addresses
424 * of the memory that has been assigned to our partition and builds
425 * a table used to translate Linux's physical addresses to these
426 * absolute addresses. Absolute addresses are needed when
427 * communicating with the hypervisor (e.g. to build HPT entries)
430 static void __init build_iSeries_Memory_Map(void)
432 u32 loadAreaFirstChunk, loadAreaLastChunk, loadAreaSize;
434 u32 hptFirstChunk, hptLastChunk, hptSizeChunks, hptSizePages;
436 u32 totalChunks,moreChunks;
437 u32 currChunk, thisChunk, absChunk;
441 struct MemoryBlock mb[32];
442 unsigned long numMemoryBlocks, curBlock;
444 /* Chunk size on iSeries is 256K bytes */
445 totalChunks = (u32)HvLpConfig_getMsChunks();
446 klimit = msChunks_alloc(klimit, totalChunks, 1UL << 18);
449 * Get absolute address of our load area
450 * and map it to physical address 0
451 * This guarantees that the loadarea ends up at physical 0
452 * otherwise, it might not be returned by PLIC as the first
456 loadAreaFirstChunk = (u32)addr_to_chunk(itLpNaca.xLoadAreaAddr);
457 loadAreaSize = itLpNaca.xLoadAreaChunks;
460 * Only add the pages already mapped here.
461 * Otherwise we might add the hpt pages
462 * The rest of the pages of the load area
463 * aren't in the HPT yet and can still
464 * be assigned an arbitrary physical address
466 if ((loadAreaSize * 64) > HvPagesToMap)
467 loadAreaSize = HvPagesToMap / 64;
469 loadAreaLastChunk = loadAreaFirstChunk + loadAreaSize - 1;
472 * TODO Do we need to do something if the HPT is in the 64MB load area?
473 * This would be required if the itLpNaca.xLoadAreaChunks includes
477 printk("Mapping load area - physical addr = 0000000000000000\n"
478 " absolute addr = %016lx\n",
479 chunk_to_addr(loadAreaFirstChunk));
480 printk("Load area size %dK\n", loadAreaSize * 256);
482 for (nextPhysChunk = 0; nextPhysChunk < loadAreaSize; ++nextPhysChunk)
483 msChunks.abs[nextPhysChunk] =
484 loadAreaFirstChunk + nextPhysChunk;
487 * Get absolute address of our HPT and remember it so
488 * we won't map it to any physical address
490 hptFirstChunk = (u32)addr_to_chunk(HvCallHpt_getHptAddress());
491 hptSizePages = (u32)HvCallHpt_getHptPages();
492 hptSizeChunks = hptSizePages >> (msChunks.chunk_shift - PAGE_SHIFT);
493 hptLastChunk = hptFirstChunk + hptSizeChunks - 1;
495 printk("HPT absolute addr = %016lx, size = %dK\n",
496 chunk_to_addr(hptFirstChunk), hptSizeChunks * 256);
498 /* Fill in the hashed page table hash mask */
499 num_ptegs = hptSizePages *
500 (PAGE_SIZE / (sizeof(HPTE) * HPTES_PER_GROUP));
501 htab_hash_mask = num_ptegs - 1;
504 * The actual hashed page table is in the hypervisor,
505 * we have no direct access
510 * Determine if absolute memory has any
511 * holes so that we can interpret the
512 * access map we get back from the hypervisor
515 numMemoryBlocks = iSeries_process_mainstore_vpd(mb, 32);
518 * Process the main store access map from the hypervisor
519 * to build up our physical -> absolute translation table
524 moreChunks = totalChunks;
527 map = HvCallSm_get64BitsOfAccessMap(itLpNaca.xLpIndex,
529 thisChunk = currChunk;
531 chunkBit = map >> 63;
535 while (thisChunk >= mb[curBlock].logicalEnd) {
537 if (curBlock >= numMemoryBlocks)
538 panic("out of memory blocks");
540 if (thisChunk < mb[curBlock].logicalStart)
541 panic("memory block error");
543 absChunk = mb[curBlock].absStart +
544 (thisChunk - mb[curBlock].logicalStart);
545 if (((absChunk < hptFirstChunk) ||
546 (absChunk > hptLastChunk)) &&
547 ((absChunk < loadAreaFirstChunk) ||
548 (absChunk > loadAreaLastChunk))) {
549 msChunks.abs[nextPhysChunk] = absChunk;
560 * main store size (in chunks) is
561 * totalChunks - hptSizeChunks
562 * which should be equal to
565 systemcfg->physicalMemorySize = chunk_to_addr(nextPhysChunk);
569 * Set up the variables that describe the cache line sizes
572 static void __init setup_iSeries_cache_sizes(void)
575 unsigned int procIx = get_paca()->lppaca.dyn_hv_phys_proc_index;
577 systemcfg->icache_size =
578 ppc64_caches.isize = xIoHriProcessorVpd[procIx].xInstCacheSize * 1024;
579 systemcfg->icache_line_size =
580 ppc64_caches.iline_size =
581 xIoHriProcessorVpd[procIx].xInstCacheOperandSize;
582 systemcfg->dcache_size =
584 xIoHriProcessorVpd[procIx].xDataL1CacheSizeKB * 1024;
585 systemcfg->dcache_line_size =
586 ppc64_caches.dline_size =
587 xIoHriProcessorVpd[procIx].xDataCacheOperandSize;
588 ppc64_caches.ilines_per_page = PAGE_SIZE / ppc64_caches.iline_size;
589 ppc64_caches.dlines_per_page = PAGE_SIZE / ppc64_caches.dline_size;
591 i = ppc64_caches.iline_size;
593 while ((i = (i / 2)))
595 ppc64_caches.log_iline_size = n;
597 i = ppc64_caches.dline_size;
599 while ((i = (i / 2)))
601 ppc64_caches.log_dline_size = n;
603 printk("D-cache line size = %d\n",
604 (unsigned int)ppc64_caches.dline_size);
605 printk("I-cache line size = %d\n",
606 (unsigned int)ppc64_caches.iline_size);
610 * Create a pte. Used during initialization only.
612 static void iSeries_make_pte(unsigned long va, unsigned long pa,
615 HPTE local_hpte, rhpte;
616 unsigned long hash, vpn;
619 vpn = va >> PAGE_SHIFT;
620 hash = hpt_hash(vpn, 0);
622 local_hpte.dw1.dword1 = pa | mode;
623 local_hpte.dw0.dword0 = 0;
624 local_hpte.dw0.dw0.avpn = va >> 23;
625 local_hpte.dw0.dw0.bolted = 1; /* bolted */
626 local_hpte.dw0.dw0.v = 1;
628 slot = HvCallHpt_findValid(&rhpte, vpn);
630 /* Must find space in primary group */
631 panic("hash_page: hpte already exists\n");
633 HvCallHpt_addValidate(slot, 0, (HPTE *)&local_hpte );
637 * Bolt the kernel addr space into the HPT
639 static void __init iSeries_bolt_kernel(unsigned long saddr, unsigned long eaddr)
642 unsigned long mode_rw = _PAGE_ACCESSED | _PAGE_COHERENT | PP_RWXX;
645 for (pa = saddr; pa < eaddr ;pa += PAGE_SIZE) {
646 unsigned long ea = (unsigned long)__va(pa);
647 unsigned long vsid = get_kernel_vsid(ea);
648 unsigned long va = (vsid << 28) | (pa & 0xfffffff);
649 unsigned long vpn = va >> PAGE_SHIFT;
650 unsigned long slot = HvCallHpt_findValid(&hpte, vpn);
652 /* Make non-kernel text non-executable */
653 if (!in_kernel_text(ea))
654 mode_rw |= HW_NO_EXEC;
656 if (hpte.dw0.dw0.v) {
657 /* HPTE exists, so just bolt it */
658 HvCallHpt_setSwBits(slot, 0x10, 0);
659 /* And make sure the pp bits are correct */
660 HvCallHpt_setPp(slot, PP_RWXX);
662 /* No HPTE exists, so create a new bolted one */
663 iSeries_make_pte(va, phys_to_abs(pa), mode_rw);
667 extern unsigned long ppc_proc_freq;
668 extern unsigned long ppc_tb_freq;
673 static void __init iSeries_setup_arch(void)
676 unsigned procIx = get_paca()->lppaca.dyn_hv_phys_proc_index;
678 /* Add an eye catcher and the systemcfg layout version number */
679 strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64");
680 systemcfg->version.major = SYSTEMCFG_MAJOR;
681 systemcfg->version.minor = SYSTEMCFG_MINOR;
683 /* Setup the Lp Event Queue */
685 /* Allocate a page for the Event Stack
686 * The hypervisor wants the absolute real address, so
687 * we subtract out the KERNELBASE and add in the
688 * absolute real address of the kernel load area
690 eventStack = alloc_bootmem_pages(LpEventStackSize);
691 memset(eventStack, 0, LpEventStackSize);
693 /* Invoke the hypervisor to initialize the event stack */
694 HvCallEvent_setLpEventStack(0, eventStack, LpEventStackSize);
696 /* Initialize fields in our Lp Event Queue */
697 xItLpQueue.xSlicEventStackPtr = (char *)eventStack;
698 xItLpQueue.xSlicCurEventPtr = (char *)eventStack;
699 xItLpQueue.xSlicLastValidEventPtr = (char *)eventStack +
700 (LpEventStackSize - LpEventMaxSize);
701 xItLpQueue.xIndex = 0;
703 /* Compute processor frequency */
704 procFreqHz = ((1UL << 34) * 1000000) /
705 xIoHriProcessorVpd[procIx].xProcFreq;
706 procFreqMhz = procFreqHz / 1000000;
707 procFreqMhzHundreths = (procFreqHz / 10000) - (procFreqMhz * 100);
708 ppc_proc_freq = procFreqHz;
710 /* Compute time base frequency */
711 tbFreqHz = ((1UL << 32) * 1000000) /
712 xIoHriProcessorVpd[procIx].xTimeBaseFreq;
713 tbFreqMhz = tbFreqHz / 1000000;
714 tbFreqMhzHundreths = (tbFreqHz / 10000) - (tbFreqMhz * 100);
715 ppc_tb_freq = tbFreqHz;
717 printk("Max logical processors = %d\n",
718 itVpdAreas.xSlicMaxLogicalProcs);
719 printk("Max physical processors = %d\n",
720 itVpdAreas.xSlicMaxPhysicalProcs);
721 printk("Processor frequency = %lu.%02lu\n", procFreqMhz,
722 procFreqMhzHundreths);
723 printk("Time base frequency = %lu.%02lu\n", tbFreqMhz,
725 systemcfg->processor = xIoHriProcessorVpd[procIx].xPVR;
726 printk("Processor version = %x\n", systemcfg->processor);
729 static void iSeries_get_cpuinfo(struct seq_file *m)
731 seq_printf(m, "machine\t\t: 64-bit iSeries Logical Partition\n");
738 static int iSeries_get_irq(struct pt_regs *regs)
740 /* -2 means ignore this interrupt */
747 static void iSeries_restart(char *cmd)
755 static void iSeries_power_off(void)
763 static void iSeries_halt(void)
768 extern void setup_default_decr(void);
771 * void __init iSeries_calibrate_decr()
774 * This routine retrieves the internal processor frequency from the VPD,
775 * and sets up the kernel timer decrementer based on that value.
778 static void __init iSeries_calibrate_decr(void)
780 unsigned long cyclesPerUsec;
781 struct div_result divres;
783 /* Compute decrementer (and TB) frequency in cycles/sec */
784 cyclesPerUsec = ppc_tb_freq / 1000000;
787 * Set the amount to refresh the decrementer by. This
788 * is the number of decrementer ticks it takes for
791 tb_ticks_per_jiffy = ppc_tb_freq / HZ;
794 /* TEST CODE FOR ADJTIME */
795 tb_ticks_per_jiffy += tb_ticks_per_jiffy / 5000;
796 /* END OF TEST CODE */
800 * tb_ticks_per_sec = freq; would give better accuracy
801 * but tb_ticks_per_sec = tb_ticks_per_jiffy*HZ; assures
802 * that jiffies (and xtime) will match the time returned
803 * by do_gettimeofday.
805 tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
806 tb_ticks_per_usec = cyclesPerUsec;
807 tb_to_us = mulhwu_scale_factor(ppc_tb_freq, 1000000);
808 div128_by_32(1024 * 1024, 0, tb_ticks_per_sec, &divres);
809 tb_to_xs = divres.result_low;
810 setup_default_decr();
813 static void __init iSeries_progress(char * st, unsigned short code)
815 printk("Progress: [%04x] - %s\n", (unsigned)code, st);
816 if (!piranha_simulator && mf_initialized) {
818 mf_display_progress(code);
824 static void __init iSeries_fixup_klimit(void)
827 * Change klimit to take into account any ram disk
828 * that may be included
831 klimit = KERNELBASE + (u64)naca.xRamDisk +
832 (naca.xRamDiskSize * PAGE_SIZE);
835 * No ram disk was included - check and see if there
836 * was an embedded system map. Change klimit to take
837 * into account any embedded system map
839 if (embedded_sysmap_end)
840 klimit = KERNELBASE + ((embedded_sysmap_end + 4095) &
845 static int __init iSeries_src_init(void)
847 /* clear the progress line */
848 ppc_md.progress(" ", 0xffff);
852 late_initcall(iSeries_src_init);
854 static int set_spread_lpevents(char *str)
857 unsigned long val = simple_strtoul(str, NULL, 0);
860 * The parameter is the number of processors to share in processing
863 if (( val > 0) && (val <= NR_CPUS)) {
864 for (i = 1; i < val; ++i)
865 paca[i].lpqueue_ptr = paca[0].lpqueue_ptr;
867 printk("lpevent processing spread over %ld processors\n", val);
869 printk("invalid spread_lpevents %ld\n", val);
874 __setup("spread_lpevents=", set_spread_lpevents);
876 void __init iSeries_early_setup(void)
878 iSeries_fixup_klimit();
880 ppc_md.setup_arch = iSeries_setup_arch;
881 ppc_md.get_cpuinfo = iSeries_get_cpuinfo;
882 ppc_md.init_IRQ = iSeries_init_IRQ;
883 ppc_md.get_irq = iSeries_get_irq;
884 ppc_md.init_early = iSeries_init_early,
886 ppc_md.pcibios_fixup = iSeries_pci_final_fixup;
888 ppc_md.restart = iSeries_restart;
889 ppc_md.power_off = iSeries_power_off;
890 ppc_md.halt = iSeries_halt;
892 ppc_md.get_boot_time = iSeries_get_boot_time;
893 ppc_md.set_rtc_time = iSeries_set_rtc_time;
894 ppc_md.get_rtc_time = iSeries_get_rtc_time;
895 ppc_md.calibrate_decr = iSeries_calibrate_decr;
896 ppc_md.progress = iSeries_progress;