The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/arm/xscale/i80321/ep80219_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/9.0/sys/arm/xscale/i80321/ep80219_machdep.c 218666 2011-02-13 20:02:46Z cognet $");
   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 
  142 /* #define IQ80321_OBIO_BASE 0xfe800000UL */
  143 /* #define IQ80321_OBIO_SIZE 0x00100000UL */
  144 
  145 /* Static device mappings. */
  146 static const struct pmap_devmap ep80219_devmap[] = {
  147         /* 
  148          * Map the on-board devices VA == PA so that we can access them
  149          * with the MMU on or off.
  150          */
  151         {
  152                 IQ80321_OBIO_BASE,
  153                 IQ80321_OBIO_BASE,
  154                 IQ80321_OBIO_SIZE,
  155                 VM_PROT_READ|VM_PROT_WRITE,                             
  156                 PTE_NOCACHE,
  157         },
  158         {
  159                 IQ80321_IOW_VBASE,
  160                 VERDE_OUT_XLATE_IO_WIN0_BASE,
  161                 VERDE_OUT_XLATE_IO_WIN_SIZE,
  162                 VM_PROT_READ|VM_PROT_WRITE,
  163                 PTE_NOCACHE,
  164         },          
  165         {
  166                 IQ80321_80321_VBASE,
  167                 VERDE_PMMR_BASE,
  168                 VERDE_PMMR_SIZE,
  169                 VM_PROT_READ|VM_PROT_WRITE,
  170                 PTE_NOCACHE,
  171         },
  172         {
  173                 0,
  174                 0,
  175                 0,
  176                 0,
  177                 0,
  178         }
  179 };
  180 
  181 extern vm_offset_t xscale_cache_clean_addr;
  182 
  183 void *
  184 initarm(void *arg, void *arg2)
  185 {
  186         struct pv_addr  kernel_l1pt;
  187         struct pv_addr  dpcpu;
  188         int loop, i;
  189         u_int l1pagetable;
  190         vm_offset_t freemempos;
  191         vm_offset_t freemem_pt;
  192         vm_offset_t afterkern;
  193         vm_offset_t freemem_after;
  194         vm_offset_t lastaddr;
  195         uint32_t memsize, memstart;
  196 
  197         set_cpufuncs();
  198         lastaddr = fake_preload_metadata();
  199         pcpu_init(pcpup, 0, sizeof(struct pcpu));
  200         PCPU_SET(curthread, &thread0);
  201 
  202         freemempos = 0xa0200000;
  203         /* Define a macro to simplify memory allocation */
  204 #define valloc_pages(var, np)                   \
  205         alloc_pages((var).pv_pa, (np));                         \
  206         (var).pv_va = (var).pv_pa + 0x20000000;
  207 
  208 #define alloc_pages(var, np)                    \
  209         freemempos -= (np * PAGE_SIZE);         \
  210         (var) = freemempos;             \
  211         memset((char *)(var), 0, ((np) * PAGE_SIZE));
  212 
  213         /* Do basic tuning, hz etc */
  214         init_param1();
  215 
  216         while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
  217                 freemempos -= PAGE_SIZE;
  218         valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
  219         for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
  220                 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
  221                         valloc_pages(kernel_pt_table[loop],
  222                                                  L2_TABLE_SIZE / PAGE_SIZE);
  223                 } else {
  224                         kernel_pt_table[loop].pv_pa = freemempos +
  225                             (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
  226                             L2_TABLE_SIZE_REAL;
  227                         kernel_pt_table[loop].pv_va = 
  228                             kernel_pt_table[loop].pv_pa + 0x20000000;
  229                 }
  230                 i++;
  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,
  263                                                          trunc_page(freemem_after) - 0xa0001000, 0);
  264         
  265         freemempos = trunc_page(freemem_after);
  266         freemempos -= PAGE_SIZE;
  267 #endif
  268         /*
  269          * Allocate memory for the l1 and l2 page tables. The scheme to avoid
  270          * wasting memory by allocating the l1pt on the first 16k memory was
  271          * taken from NetBSD rpc_machdep.c. NKPT should be greater than 12 for
  272          * this to work (which is supposed to be the case).
  273          */
  274 
  275         /*
  276          * Now we start construction of the L1 page table
  277          * We start by mapping the L2 page tables into the L1.
  278          * This means that we can replace L1 mappings later on if necessary
  279          */
  280         l1pagetable = kernel_l1pt.pv_va;
  281 
  282         /* Map the L2 pages tables in the L1 page table */
  283         pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
  284                                    &kernel_pt_table[KERNEL_PT_SYS]);
  285         pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE,
  286                                    &kernel_pt_table[KERNEL_PT_IOPXS]);
  287         pmap_link_l2pt(l1pagetable, KERNBASE,
  288                                    &kernel_pt_table[KERNEL_PT_BEFOREKERN]);
  289         pmap_map_chunk(l1pagetable, KERNBASE, IQ80321_SDRAM_START, 0x100000,
  290                                    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  291         pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, IQ80321_SDRAM_START + 0x100000,
  292                                    0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
  293         pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, IQ80321_SDRAM_START + 0x200000,
  294                                    (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
  295                                    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  296         freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1);
  297         afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE 
  298                                                                                                                                    - 1));
  299         for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
  300                 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
  301                                            &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
  302         }
  303         pmap_map_entry(l1pagetable, afterkern, minidataclean.pv_pa, 
  304                                    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  305         
  306 
  307 #ifdef ARM_USE_SMALL_ALLOC
  308         if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) {
  309                 arm_add_smallalloc_pages((void *)(freemem_after),
  310                     (void*)(freemem_after + PAGE_SIZE),
  311                     afterkern - (freemem_after + PAGE_SIZE), 0);
  312                     
  313         }
  314 #endif
  315 
  316         /* Map the Mini-Data cache clean area. */
  317         xscale_setup_minidata(l1pagetable, afterkern,
  318                                                   minidataclean.pv_pa);
  319 
  320         /* Map the vector page. */
  321         pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
  322                                    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  323         pmap_devmap_bootstrap(l1pagetable, ep80219_devmap);
  324         /*
  325          * Give the XScale global cache clean code an appropriately
  326          * sized chunk of unmapped VA space starting at 0xff000000
  327          * (our device mappings end before this address).
  328          */
  329         xscale_cache_clean_addr = 0xff000000U;
  330 
  331         cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
  332         setttb(kernel_l1pt.pv_pa);
  333         cpu_tlb_flushID();
  334         cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
  335         /*
  336          * Pages were allocated during the secondary bootstrap for the
  337          * stacks for different CPU modes.
  338          * We must now set the r13 registers in the different CPU modes to
  339          * point to these stacks.
  340          * Since the ARM stacks use STMFD etc. we must set r13 to the top end
  341          * of the stack memory.
  342          */
  343 
  344                                    
  345         set_stackptr(PSR_IRQ32_MODE,
  346             irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
  347         set_stackptr(PSR_ABT32_MODE,
  348             abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
  349         set_stackptr(PSR_UND32_MODE,
  350             undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
  351 
  352 
  353 
  354         /*
  355          * We must now clean the cache again....
  356          * Cleaning may be done by reading new data to displace any
  357          * dirty data in the cache. This will have happened in setttb()
  358          * but since we are boot strapping the addresses used for the read
  359          * may have just been remapped and thus the cache could be out
  360          * of sync. A re-clean after the switch will cure this.
  361          * After booting there are no gross relocations of the kernel thus
  362          * this problem will not occur after initarm().
  363          */
  364         cpu_idcache_wbinv_all();
  365         /*
  366          * Fetch the SDRAM start/size from the i80321 SDRAM configration
  367          * registers.
  368          */
  369         i80321_calibrate_delay();
  370         i80321_sdram_bounds(&obio_bs_tag, IQ80321_80321_VBASE + VERDE_MCU_BASE,
  371             &memstart, &memsize);
  372         physmem = memsize / PAGE_SIZE;
  373         cninit();
  374 
  375         /* Set stack for exception handlers */
  376         
  377         data_abort_handler_address = (u_int)data_abort_handler;
  378         prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
  379         undefined_handler_address = (u_int)undefinedinstruction_bounce;
  380         undefined_init();
  381                                 
  382         proc_linkup0(&proc0, &thread0);
  383         thread0.td_kstack = kernelstack.pv_va;
  384         thread0.td_pcb = (struct pcb *)
  385                 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
  386         thread0.td_pcb->pcb_flags = 0;
  387         thread0.td_frame = &proc0_tf;
  388         pcpup->pc_curpcb = thread0.td_pcb;
  389         
  390         /* Enable MMU, I-cache, D-cache, write buffer. */
  391 
  392         arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
  393         pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
  394         dump_avail[0] = 0xa0000000;
  395         dump_avail[1] = 0xa0000000 + memsize;
  396         dump_avail[2] = 0;
  397         dump_avail[3] = 0;
  398         pmap_bootstrap(pmap_curmaxkvaddr, 
  399             0xd0000000, &kernel_l1pt);
  400         msgbufp = (void*)msgbufpv.pv_va;
  401         msgbufinit(msgbufp, msgbufsize);
  402         mutex_init();
  403         
  404         i = 0;
  405 #ifdef ARM_USE_SMALL_ALLOC
  406         phys_avail[i++] = 0xa0000000;
  407         phys_avail[i++] = 0xa0001000;   /*
  408                                          *XXX: Gross hack to get our
  409                                          * pages in the vm_page_array
  410                                          . */
  411 #endif
  412         phys_avail[i++] = round_page(virtual_avail - KERNBASE + IQ80321_SDRAM_START);
  413         phys_avail[i++] = trunc_page(0xa0000000 + memsize - 1);
  414         phys_avail[i++] = 0;
  415         phys_avail[i] = 0;
  416         
  417         init_param2(physmem);
  418         kdb_init();
  419         return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
  420             sizeof(struct pcb)));
  421 }
  422 
  423 extern int
  424 machdep_pci_route_interrupt(device_t pcib, device_t dev, int pin)
  425 {
  426         int bus;
  427         int device;
  428         int func;
  429         uint32_t busno;
  430         struct i80321_pci_softc *sc = device_get_softc(pcib);
  431         bus = pci_get_bus(dev);
  432         device = pci_get_slot(dev);
  433         func = pci_get_function(dev);
  434         busno = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, ATU_PCIXSR);
  435         busno = PCIXSR_BUSNO(busno);
  436         if (busno == 0xff)
  437                 busno = 0;
  438         if (bus != busno)
  439                 goto no_mapping;
  440         switch (device) {
  441                 /* EP80219 PCI */
  442         case 1: /* Ethernet i82555 10/100 */
  443                 printf("Device %d routed to irq %d\n", device, ICU_INT_XINT(0));
  444                 return (ICU_INT_XINT(0));
  445         case 2: /* UART */
  446                 printf("Device %d routed to irq %d\n", device, ICU_INT_XINT(1));
  447                 return (ICU_INT_XINT(1));
  448         case 3:
  449                 /*
  450                  * The S-ATA chips are behind the bridge, and all of
  451                  * the S-ATA interrupts are wired together.
  452                  */
  453                 printf("Device %d routed to irq %d\n", device, ICU_INT_XINT(2));
  454                 return (ICU_INT_XINT(2));
  455         case 4: /* MINI-PIC_INT */
  456                 printf("Device %d routed to irq %d\n", device, ICU_INT_XINT(3));
  457                 return( ICU_INT_XINT(3));
  458         default:
  459 no_mapping:
  460                 printf("No mapping for %d/%d/%d/%c\n", bus, device, func, pin);
  461                 
  462         }
  463         return (0);
  464 
  465 }

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