The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/arm/xscale/i80321/iq31244_machdep.c

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    1 /*      $NetBSD: hpc_machdep.c,v 1.70 2003/09/16 08:18:22 agc Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 1994-1998 Mark Brinicombe.
    5  * Copyright (c) 1994 Brini.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software written for Brini by Mark Brinicombe
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *      This product includes software developed by Brini.
   21  * 4. The name of the company nor the name of the author may be used to
   22  *    endorse or promote products derived from this software without specific
   23  *    prior written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
   26  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   27  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   28  * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   29  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   30  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   35  * SUCH DAMAGE.
   36  *
   37  * RiscBSD kernel project
   38  *
   39  * machdep.c
   40  *
   41  * Machine dependant functions for kernel setup
   42  *
   43  * This file needs a lot of work. 
   44  *
   45  * Created      : 17/09/94
   46  */
   47 
   48 #include <sys/cdefs.h>
   49 __FBSDID("$FreeBSD: releng/8.4/sys/arm/xscale/i80321/iq31244_machdep.c 219662 2011-03-15 08:20:59Z pluknet $");
   50 
   51 #define _ARM32_BUS_DMA_PRIVATE
   52 #include <sys/param.h>
   53 #include <sys/systm.h>
   54 #include <sys/sysproto.h>
   55 #include <sys/signalvar.h>
   56 #include <sys/imgact.h>
   57 #include <sys/kernel.h>
   58 #include <sys/ktr.h>
   59 #include <sys/linker.h>
   60 #include <sys/lock.h>
   61 #include <sys/malloc.h>
   62 #include <sys/mutex.h>
   63 #include <sys/pcpu.h>
   64 #include <sys/proc.h>
   65 #include <sys/ptrace.h>
   66 #include <sys/cons.h>
   67 #include <sys/bio.h>
   68 #include <sys/bus.h>
   69 #include <sys/buf.h>
   70 #include <sys/exec.h>
   71 #include <sys/kdb.h>
   72 #include <sys/msgbuf.h>
   73 #include <machine/reg.h>
   74 #include <machine/cpu.h>
   75 
   76 #include <vm/vm.h>
   77 #include <vm/pmap.h>
   78 #include <vm/vm_object.h>
   79 #include <vm/vm_page.h>
   80 #include <vm/vm_pager.h>
   81 #include <vm/vm_map.h>
   82 #include <vm/vnode_pager.h>
   83 #include <machine/pmap.h>
   84 #include <machine/vmparam.h>
   85 #include <machine/pcb.h>
   86 #include <machine/undefined.h>
   87 #include <machine/machdep.h>
   88 #include <machine/metadata.h>
   89 #include <machine/armreg.h>
   90 #include <machine/bus.h>
   91 #include <sys/reboot.h>
   92 
   93 #include <arm/xscale/i80321/i80321reg.h>
   94 #include <arm/xscale/i80321/i80321var.h>
   95 #include <arm/xscale/i80321/iq80321reg.h>
   96 #include <arm/xscale/i80321/obiovar.h>
   97 
   98 #define KERNEL_PT_SYS           0       /* Page table for mapping proc0 zero page */
   99 #define KERNEL_PT_IOPXS         1
  100 #define KERNEL_PT_BEFOREKERN    2
  101 #define KERNEL_PT_AFKERNEL      3       /* L2 table for mapping after kernel */
  102 #define KERNEL_PT_AFKERNEL_NUM  9
  103 
  104 /* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */
  105 #define NUM_KERNEL_PTS          (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM)
  106 
  107 /* Define various stack sizes in pages */
  108 #define IRQ_STACK_SIZE  1
  109 #define ABT_STACK_SIZE  1
  110 #define UND_STACK_SIZE  1
  111 
  112 extern u_int data_abort_handler_address;
  113 extern u_int prefetch_abort_handler_address;
  114 extern u_int undefined_handler_address;
  115 
  116 struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
  117 
  118 extern void *_end;
  119 
  120 extern int *end;
  121 
  122 struct pcpu __pcpu;
  123 struct pcpu *pcpup = &__pcpu;
  124 
  125 /* Physical and virtual addresses for some global pages */
  126 
  127 vm_paddr_t phys_avail[10];
  128 vm_paddr_t dump_avail[4];
  129 vm_offset_t physical_pages;
  130 
  131 struct pv_addr systempage;
  132 struct pv_addr msgbufpv;
  133 struct pv_addr irqstack;
  134 struct pv_addr undstack;
  135 struct pv_addr abtstack;
  136 struct pv_addr kernelstack;
  137 struct pv_addr minidataclean;
  138 
  139 static struct trapframe proc0_tf;
  140 
  141 #define IQ80321_OBIO_BASE 0xfe800000UL
  142 #define IQ80321_OBIO_SIZE 0x00100000UL
  143 /* Static device mappings. */
  144 static const struct pmap_devmap iq80321_devmap[] = {
  145         /* 
  146          * Map the on-board devices VA == PA so that we can access them
  147          * with the MMU on or off.
  148          */
  149             {
  150                     IQ80321_OBIO_BASE,
  151                     IQ80321_OBIO_BASE,
  152                     IQ80321_OBIO_SIZE,
  153                     VM_PROT_READ|VM_PROT_WRITE,                             
  154                     PTE_NOCACHE,
  155             },
  156             {
  157                     IQ80321_IOW_VBASE,
  158                     VERDE_OUT_XLATE_IO_WIN0_BASE,
  159                     VERDE_OUT_XLATE_IO_WIN_SIZE,
  160                     VM_PROT_READ|VM_PROT_WRITE,
  161                     PTE_NOCACHE,
  162             },
  163             
  164             {
  165                     IQ80321_80321_VBASE,
  166                     VERDE_PMMR_BASE,
  167                     VERDE_PMMR_SIZE,
  168                     VM_PROT_READ|VM_PROT_WRITE,
  169                     PTE_NOCACHE,
  170             },
  171             {
  172                     0,
  173                     0,
  174                     0,
  175                     0,
  176                     0,
  177             }
  178 };
  179 
  180 #define SDRAM_START 0xa0000000
  181 
  182 extern vm_offset_t xscale_cache_clean_addr;
  183 
  184 void *
  185 initarm(void *arg, void *arg2)
  186 {
  187         struct pv_addr  kernel_l1pt;
  188         struct pv_addr  dpcpu;
  189         int loop, i;
  190         u_int l1pagetable;
  191         vm_offset_t freemempos;
  192         vm_offset_t freemem_pt;
  193         vm_offset_t afterkern;
  194         vm_offset_t freemem_after;
  195         vm_offset_t lastaddr;
  196         uint32_t memsize, memstart;
  197 
  198         set_cpufuncs();
  199         lastaddr = fake_preload_metadata();
  200         pcpu_init(pcpup, 0, sizeof(struct pcpu));
  201         PCPU_SET(curthread, &thread0);
  202 
  203         /* Do basic tuning, hz etc */
  204         init_param1();
  205                 
  206         freemempos = 0xa0200000;
  207         /* Define a macro to simplify memory allocation */
  208 #define valloc_pages(var, np)                   \
  209         alloc_pages((var).pv_pa, (np));         \
  210         (var).pv_va = (var).pv_pa + 0x20000000;
  211 
  212 #define alloc_pages(var, np)                    \
  213         freemempos -= (np * PAGE_SIZE);         \
  214         (var) = freemempos;             \
  215         memset((char *)(var), 0, ((np) * PAGE_SIZE));
  216 
  217         while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
  218                 freemempos -= PAGE_SIZE;
  219         valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
  220         for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
  221                 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
  222                         valloc_pages(kernel_pt_table[loop],
  223                             L2_TABLE_SIZE / PAGE_SIZE);
  224                 } else {
  225                         kernel_pt_table[loop].pv_pa = freemempos +
  226                             (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
  227                             L2_TABLE_SIZE_REAL;
  228                         kernel_pt_table[loop].pv_va = 
  229                             kernel_pt_table[loop].pv_pa + 0x20000000;
  230                 }
  231         }
  232         freemem_pt = freemempos;
  233         freemempos = 0xa0100000;
  234         /*
  235          * Allocate a page for the system page mapped to V0x00000000
  236          * This page will just contain the system vectors and can be
  237          * shared by all processes.
  238          */
  239         valloc_pages(systempage, 1);
  240 
  241         /* Allocate dynamic per-cpu area. */
  242         valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE);
  243         dpcpu_init((void *)dpcpu.pv_va, 0);
  244 
  245         /* Allocate stacks for all modes */
  246         valloc_pages(irqstack, IRQ_STACK_SIZE);
  247         valloc_pages(abtstack, ABT_STACK_SIZE);
  248         valloc_pages(undstack, UND_STACK_SIZE);
  249         valloc_pages(kernelstack, KSTACK_PAGES);
  250         alloc_pages(minidataclean.pv_pa, 1);
  251         valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE);
  252 #ifdef ARM_USE_SMALL_ALLOC
  253         freemempos -= PAGE_SIZE;
  254         freemem_pt = trunc_page(freemem_pt);
  255         freemem_after = freemempos - ((freemem_pt - 0xa0100000) /
  256             PAGE_SIZE) * sizeof(struct arm_small_page);
  257         arm_add_smallalloc_pages((void *)(freemem_after + 0x20000000)
  258             , (void *)0xc0100000, freemem_pt - 0xa0100000, 1);
  259         freemem_after -= ((freemem_after - 0xa0001000) / PAGE_SIZE) *
  260             sizeof(struct arm_small_page);
  261         arm_add_smallalloc_pages((void *)(freemem_after + 0x20000000)
  262         , (void *)0xc0001000, trunc_page(freemem_after) - 0xa0001000, 0);
  263         freemempos = trunc_page(freemem_after);
  264         freemempos -= PAGE_SIZE;
  265 #endif
  266         /*
  267          * Allocate memory for the l1 and l2 page tables. The scheme to avoid
  268          * wasting memory by allocating the l1pt on the first 16k memory was
  269          * taken from NetBSD rpc_machdep.c. NKPT should be greater than 12 for
  270          * this to work (which is supposed to be the case).
  271          */
  272 
  273         /*
  274          * Now we start construction of the L1 page table
  275          * We start by mapping the L2 page tables into the L1.
  276          * This means that we can replace L1 mappings later on if necessary
  277          */
  278         l1pagetable = kernel_l1pt.pv_va;
  279 
  280         /* Map the L2 pages tables in the L1 page table */
  281         pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
  282             &kernel_pt_table[KERNEL_PT_SYS]);
  283         pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE,
  284                         &kernel_pt_table[KERNEL_PT_IOPXS]);
  285         pmap_link_l2pt(l1pagetable, KERNBASE,
  286             &kernel_pt_table[KERNEL_PT_BEFOREKERN]);
  287         pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
  288             VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  289         pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
  290             0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
  291         pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
  292            (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
  293             VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  294         freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1);
  295         afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE 
  296             - 1));
  297         for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
  298                 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
  299                     &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
  300         }
  301         pmap_map_entry(l1pagetable, afterkern, minidataclean.pv_pa, 
  302             VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  303         
  304 
  305 #ifdef ARM_USE_SMALL_ALLOC
  306         if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) {
  307                 arm_add_smallalloc_pages((void *)(freemem_after),
  308                     (void*)(freemem_after + PAGE_SIZE),
  309                     afterkern - (freemem_after + PAGE_SIZE), 0);
  310                     
  311         }
  312 #endif
  313 
  314         /* Map the Mini-Data cache clean area. */
  315         xscale_setup_minidata(l1pagetable, afterkern,
  316             minidataclean.pv_pa);
  317 
  318         /* Map the vector page. */
  319         pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
  320             VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  321         pmap_devmap_bootstrap(l1pagetable, iq80321_devmap);
  322         /*
  323          * Give the XScale global cache clean code an appropriately
  324          * sized chunk of unmapped VA space starting at 0xff000000
  325          * (our device mappings end before this address).
  326          */
  327         xscale_cache_clean_addr = 0xff000000U;
  328 
  329         cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
  330         setttb(kernel_l1pt.pv_pa);
  331         cpu_tlb_flushID();
  332         cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
  333         /*
  334          * Pages were allocated during the secondary bootstrap for the
  335          * stacks for different CPU modes.
  336          * We must now set the r13 registers in the different CPU modes to
  337          * point to these stacks.
  338          * Since the ARM stacks use STMFD etc. we must set r13 to the top end
  339          * of the stack memory.
  340          */
  341 
  342                                    
  343         set_stackptr(PSR_IRQ32_MODE,
  344             irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
  345         set_stackptr(PSR_ABT32_MODE,
  346             abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
  347         set_stackptr(PSR_UND32_MODE,
  348             undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
  349 
  350 
  351 
  352         /*
  353          * We must now clean the cache again....
  354          * Cleaning may be done by reading new data to displace any
  355          * dirty data in the cache. This will have happened in setttb()
  356          * but since we are boot strapping the addresses used for the read
  357          * may have just been remapped and thus the cache could be out
  358          * of sync. A re-clean after the switch will cure this.
  359          * After booting there are no gross relocations of the kernel thus
  360          * this problem will not occur after initarm().
  361          */
  362         cpu_idcache_wbinv_all();
  363         /*
  364          * Fetch the SDRAM start/size from the i80321 SDRAM configration
  365          * registers.
  366          */
  367         i80321_calibrate_delay();
  368         i80321_sdram_bounds(&obio_bs_tag, IQ80321_80321_VBASE + VERDE_MCU_BASE,
  369             &memstart, &memsize);
  370         physmem = memsize / PAGE_SIZE;
  371         cninit();
  372 
  373         /* Set stack for exception handlers */
  374         
  375         data_abort_handler_address = (u_int)data_abort_handler;
  376         prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
  377         undefined_handler_address = (u_int)undefinedinstruction_bounce;
  378         undefined_init();
  379                                 
  380         proc_linkup0(&proc0, &thread0);
  381         thread0.td_kstack = kernelstack.pv_va;
  382         thread0.td_pcb = (struct pcb *)
  383                 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
  384         thread0.td_pcb->pcb_flags = 0;
  385         thread0.td_frame = &proc0_tf;
  386         pcpup->pc_curpcb = thread0.td_pcb;
  387         
  388         /* Enable MMU, I-cache, D-cache, write buffer. */
  389 
  390         arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
  391 
  392 
  393 
  394         pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
  395         /*
  396          * ARM_USE_SMALL_ALLOC uses dump_avail, so it must be filled before
  397          * calling pmap_bootstrap.
  398          */
  399         dump_avail[0] = 0xa0000000;
  400         dump_avail[1] = 0xa0000000 + memsize;
  401         dump_avail[2] = 0;
  402         dump_avail[3] = 0;
  403                                         
  404         pmap_bootstrap(pmap_curmaxkvaddr, 
  405             0xd0000000, &kernel_l1pt);
  406         msgbufp = (void*)msgbufpv.pv_va;
  407         msgbufinit(msgbufp, msgbufsize);
  408         mutex_init();
  409         
  410         i = 0;
  411 #ifdef ARM_USE_SMALL_ALLOC
  412         phys_avail[i++] = 0xa0000000;
  413         phys_avail[i++] = 0xa0001000;   /*
  414                                          *XXX: Gross hack to get our
  415                                          * pages in the vm_page_array
  416                                          . */
  417 #endif
  418         phys_avail[i++] = round_page(virtual_avail - KERNBASE + SDRAM_START);
  419         phys_avail[i++] = trunc_page(0xa0000000 + memsize - 1);
  420         phys_avail[i++] = 0;
  421         phys_avail[i] = 0;
  422         
  423         init_param2(physmem);
  424         kdb_init();
  425         return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
  426             sizeof(struct pcb)));
  427 }
  428 
  429 
  430 extern int
  431 machdep_pci_route_interrupt(device_t pcib, device_t dev, int pin)
  432 {
  433         int bus;
  434         int device;
  435         int func;
  436         uint32_t busno;
  437         struct i80321_pci_softc *sc = device_get_softc(pcib);
  438         bus = pci_get_bus(dev);
  439         device = pci_get_slot(dev);
  440         func = pci_get_function(dev);
  441         busno = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, ATU_PCIXSR);
  442         busno = PCIXSR_BUSNO(busno);
  443         if (busno == 0xff)
  444                 busno = 0;
  445         if (bus != busno)
  446                 goto no_mapping;
  447         switch (device) {
  448                 /* IQ31244 PCI */
  449         case 1: /* PCIX-PCIX bridge */
  450                 /*
  451                  * The S-ATA chips are behind the bridge, and all of
  452                  * the S-ATA interrupts are wired together.
  453                  */
  454                 return (ICU_INT_XINT(2));
  455         case 2: /* PCI slot */
  456                 /* All pins are wired together. */
  457                 return (ICU_INT_XINT(3));
  458         case 3: /* i82546 dual Gig-E */
  459                 if (pin == 1 || pin == 2)
  460                         return (ICU_INT_XINT(0));
  461                 goto no_mapping;
  462                 /* IQ80321 PCI */
  463         case 4: /* i82544 Gig-E */
  464         case 8: /*
  465                  * Apparently you can set the device for the ethernet adapter
  466                  * to 8 with a jumper, so handle that as well
  467                  */
  468                 if (pin == 1)
  469                         return (ICU_INT_XINT(0));
  470                 goto no_mapping;
  471         case 6: /* S-PCI-X slot */
  472                 if (pin == 1)
  473                         return (ICU_INT_XINT(2));
  474                 if (pin == 2)
  475                         return (ICU_INT_XINT(3));
  476                 goto no_mapping;
  477         default:
  478 no_mapping:
  479                 printf("No mapping for %d/%d/%d/%c\n", bus, device, func, pin);
  480                 
  481         }
  482         return (0);
  483 
  484 }

Cache object: 1f2a12f90f40b5b75a0e215c93aa1ce7


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