The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/arm/sa11x0/assabet_machdep.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    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 
   49 #include <sys/cdefs.h>
   50 __FBSDID("$FreeBSD$");
   51 
   52 #include "opt_md.h"
   53 
   54 #define _ARM32_BUS_DMA_PRIVATE
   55 #include <sys/param.h>
   56 #include <sys/systm.h>
   57 #include <sys/sysproto.h>
   58 #include <sys/signalvar.h>
   59 #include <sys/imgact.h>
   60 #include <sys/kernel.h>
   61 #include <sys/ktr.h>
   62 #include <sys/linker.h>
   63 #include <sys/lock.h>
   64 #include <sys/malloc.h>
   65 #include <sys/mutex.h>
   66 #include <sys/pcpu.h>
   67 #include <sys/proc.h>
   68 #include <sys/ptrace.h>
   69 #include <sys/cons.h>
   70 #include <sys/bio.h>
   71 #include <sys/bus.h>
   72 #include <sys/buf.h>
   73 #include <sys/exec.h>
   74 #include <sys/kdb.h>
   75 #include <machine/reg.h>
   76 #include <machine/cpu.h>
   77 
   78 #include <vm/vm.h>
   79 #include <vm/pmap.h>
   80 #include <vm/vm.h>
   81 #include <vm/vm_object.h>
   82 #include <vm/vm_page.h>
   83 #include <vm/vm_pager.h>
   84 #include <vm/vm_map.h>
   85 #include <vm/vnode_pager.h>
   86 #include <machine/pmap.h>
   87 #include <machine/vmparam.h>
   88 #include <machine/pcb.h>
   89 #include <machine/undefined.h>
   90 #include <machine/machdep.h>
   91 #include <machine/metadata.h>
   92 #include <machine/armreg.h>
   93 #include <machine/bus.h>
   94 #include <sys/reboot.h>
   95 
   96 #define MDROOT_ADDR 0xd0400000
   97 
   98 #define KERNEL_PT_VMEM          0       /* Page table for mapping video memory */
   99 #define KERNEL_PT_SYS           0       /* Page table for mapping proc0 zero page */
  100 #define KERNEL_PT_IO            3       /* Page table for mapping IO */
  101 #define KERNEL_PT_IRQ           2       /* Page table for mapping irq handler */
  102 #define KERNEL_PT_KERNEL        1       /* Page table for mapping kernel */
  103 #define KERNEL_PT_L1            4       /* Page table for mapping l1pt */
  104 #define KERNEL_PT_VMDATA        5       /* Page tables for mapping kernel VM */
  105 #define KERNEL_PT_VMDATA_NUM    4       /* start with 16MB of KVM */
  106 #define NUM_KERNEL_PTS          (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
  107 
  108 /* Define various stack sizes in pages */
  109 #define IRQ_STACK_SIZE  1
  110 #define ABT_STACK_SIZE  1
  111 #ifdef IPKDB
  112 #define UND_STACK_SIZE  2
  113 #else
  114 #define UND_STACK_SIZE  1
  115 #endif
  116 #define KERNEL_VM_BASE          (KERNBASE + 0x00c00000)
  117 #define KERNEL_VM_SIZE          0x05000000
  118 
  119 extern u_int data_abort_handler_address;
  120 extern u_int prefetch_abort_handler_address;
  121 extern u_int undefined_handler_address;
  122 
  123 struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
  124 
  125 extern void *_end;
  126 
  127 int got_mmu = 0;
  128 
  129 extern vm_offset_t sa1_cache_clean_addr;
  130 
  131 extern int *end;
  132 
  133 struct pcpu __pcpu;
  134 struct pcpu *pcpup = &__pcpu;
  135 
  136 #ifndef MD_ROOT_SIZE
  137 #define MD_ROOT_SIZE 65535
  138 #endif
  139 /* Physical and virtual addresses for some global pages */
  140 
  141 vm_paddr_t phys_avail[10];
  142 vm_paddr_t physical_start;
  143 vm_paddr_t physical_end;
  144 vm_paddr_t physical_freestart;
  145 vm_offset_t physical_pages;
  146 vm_offset_t clean_sva, clean_eva;
  147 
  148 struct pv_addr systempage;
  149 struct pv_addr irqstack;
  150 struct pv_addr undstack;
  151 struct pv_addr abtstack;
  152 struct pv_addr kernelstack;
  153 void enable_mmu(vm_offset_t);
  154 static struct trapframe proc0_tf;
  155 
  156 struct arm32_dma_range *
  157 bus_dma_get_range(void)
  158 {
  159 
  160         return (NULL);
  161 }
  162 
  163 int
  164 bus_dma_get_range_nb(void)
  165 {
  166         return (0);
  167 }
  168 
  169 void
  170 cpu_reset()
  171 {
  172         cpu_halt();
  173         while (1);
  174 }
  175 
  176 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2)
  177 
  178 void *
  179 initarm(void *arg, void *arg2)
  180 {
  181         struct pcpu *pc;
  182         struct pv_addr  kernel_l1pt;
  183         struct pv_addr  md_addr;
  184         struct pv_addr  md_bla;
  185         int loop;
  186         u_int kerneldatasize, symbolsize;
  187         u_int l1pagetable;
  188         vm_offset_t freemempos;
  189         vm_offset_t lastalloced;
  190         vm_size_t pt_size;
  191         int i = 0;
  192         uint32_t fake_preload[35];
  193 
  194         boothowto = RB_VERBOSE | RB_SINGLE;
  195         cninit();
  196         set_cpufuncs();
  197         fake_preload[i++] = MODINFO_NAME;
  198         fake_preload[i++] = strlen("elf kernel") + 1;
  199         strcpy((char*)&fake_preload[i++], "elf kernel");
  200         i += 2;
  201         fake_preload[i++] = MODINFO_TYPE;
  202         fake_preload[i++] = strlen("elf kernel") + 1;
  203         strcpy((char*)&fake_preload[i++], "elf kernel");
  204         i += 2;
  205         fake_preload[i++] = MODINFO_ADDR;
  206         fake_preload[i++] = sizeof(vm_offset_t);
  207         fake_preload[i++] = KERNBASE;
  208         fake_preload[i++] = MODINFO_SIZE;
  209         fake_preload[i++] = sizeof(uint32_t);
  210         fake_preload[i++] = (uint32_t)&end - KERNBASE;
  211         fake_preload[i++] = MODINFO_NAME;
  212         fake_preload[i++] = strlen("md root") + 1;
  213         strcpy((char*)&fake_preload[i++], "md root");
  214         i += 1;
  215         fake_preload[i++] = MODINFO_TYPE;
  216         fake_preload[i++] = strlen("md_image") + 1;
  217         strcpy((char*)&fake_preload[i++], "md_image");
  218         i += 2;
  219         fake_preload[i++] = MODINFO_ADDR;
  220         fake_preload[i++] = sizeof(uint32_t);
  221         fake_preload[i++] = MDROOT_ADDR;
  222         fake_preload[i++] = MODINFO_SIZE;
  223         fake_preload[i++] = sizeof(uint32_t);
  224         fake_preload[i++] = MD_ROOT_SIZE * 1024;
  225         fake_preload[i++] = 0;
  226         fake_preload[i] = 0;
  227         preload_metadata = (void *)fake_preload;
  228 
  229         physmem =( 16 * 1024 * 1024) / PAGE_SIZE;
  230         pc = &__pcpu;
  231         pcpu_init(pc, 0, sizeof(struct pcpu));
  232         PCPU_SET(curthread, &thread0);
  233 
  234         physical_start = (vm_offset_t) KERNBASE;
  235         physical_end =  (vm_offset_t) &end;
  236         physical_freestart = (((vm_offset_t)physical_end) + PAGE_MASK) & ~PAGE_MASK;
  237         md_addr.pv_va = md_addr.pv_pa = MDROOT_ADDR;
  238 #define KERNEL_TEXT_BASE (KERNBASE + 0x00040000)
  239         kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE;
  240         symbolsize = 0;
  241         freemempos = (vm_offset_t)round_page(physical_freestart);
  242         memset((void *)freemempos, 0, 256*1024);
  243                 /* Define a macro to simplify memory allocation */
  244 #define valloc_pages(var, np)                   \
  245         alloc_pages((var).pv_pa, (np));         \
  246         (var).pv_va = (var).pv_pa;
  247 
  248 #define alloc_pages(var, np)                    \
  249         (var) = freemempos;             \
  250         freemempos += ((np) * PAGE_SIZE);\
  251         memset((char *)(var), 0, ((np) * PAGE_SIZE));
  252 
  253         while ((freemempos & (L1_TABLE_SIZE - 1)) != 0)
  254                 freemempos += PAGE_SIZE;
  255         valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
  256         valloc_pages(md_bla, L2_TABLE_SIZE / PAGE_SIZE);
  257         alloc_pages(sa1_cache_clean_addr, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE);
  258         for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
  259                 valloc_pages(kernel_pt_table[loop],
  260                     L2_TABLE_SIZE / PAGE_SIZE);
  261         }
  262 
  263         valloc_pages(systempage, 1);
  264 
  265         /*
  266          * Allocate a page for the system page mapped to V0x00000000
  267          * This page will just contain the system vectors and can be
  268          * shared by all processes.
  269          */
  270         pt_size = round_page(freemempos) - physical_freestart;
  271 
  272         /* Allocate stacks for all modes */
  273         valloc_pages(irqstack, IRQ_STACK_SIZE);
  274         valloc_pages(abtstack, ABT_STACK_SIZE);
  275         valloc_pages(undstack, UND_STACK_SIZE);
  276         valloc_pages(kernelstack, KSTACK_PAGES);
  277         lastalloced = kernelstack.pv_va;
  278 
  279         /*
  280          * Allocate memory for the l1 and l2 page tables. The scheme to avoid
  281          * wasting memory by allocating the l1pt on the first 16k memory was
  282          * taken from NetBSD rpc_machdep.c. NKPT should be greater than 12 for
  283          * this to work (which is supposed to be the case).
  284          */
  285 
  286         /*
  287          * Now we start construction of the L1 page table
  288          * We start by mapping the L2 page tables into the L1.
  289          * This means that we can replace L1 mappings later on if necessary
  290          */
  291         l1pagetable = kernel_l1pt.pv_pa;
  292 
  293 
  294         /* Map the L2 pages tables in the L1 page table */
  295         pmap_link_l2pt(l1pagetable, 0x00000000,
  296             &kernel_pt_table[KERNEL_PT_SYS]);
  297         pmap_link_l2pt(l1pagetable, KERNBASE,
  298             &kernel_pt_table[KERNEL_PT_KERNEL]);
  299         pmap_link_l2pt(l1pagetable, 0xd0000000,
  300             &kernel_pt_table[KERNEL_PT_IO]);
  301         pmap_link_l2pt(l1pagetable, lastalloced & ~((L1_S_SIZE * 4) - 1),
  302             &kernel_pt_table[KERNEL_PT_L1]);
  303         pmap_link_l2pt(l1pagetable, 0x90000000, &kernel_pt_table[KERNEL_PT_IRQ]);
  304         pmap_link_l2pt(l1pagetable, MDROOT_ADDR,
  305             &md_bla);
  306         for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
  307                 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
  308                     &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
  309         pmap_map_chunk(l1pagetable, KERNBASE, KERNBASE,
  310            (uint32_t)&end - KERNBASE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  311         /* Map the stack pages */
  312         pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
  313             IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  314         pmap_map_chunk(l1pagetable, md_addr.pv_va, md_addr.pv_pa,
  315             MD_ROOT_SIZE * 1024, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  316         pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
  317             ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  318         pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
  319             UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  320         pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
  321             KSTACK_PAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  322 
  323         pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
  324             L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
  325 
  326         for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
  327                 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
  328                     kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
  329                     VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
  330         }
  331         pmap_map_chunk(l1pagetable, md_bla.pv_va, md_bla.pv_pa, L2_TABLE_SIZE,
  332             VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
  333         /* Map the vector page. */
  334         pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
  335             VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  336         /* Map SACOM3. */
  337         pmap_map_entry(l1pagetable, 0xd000d000, 0x80010000, 
  338             VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
  339         pmap_map_entry(l1pagetable, 0x90050000, 0x90050000,
  340             VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
  341         pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xf0000000, 
  342             CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  343 
  344         data_abort_handler_address = (u_int)data_abort_handler;
  345         prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
  346         undefined_handler_address = (u_int)undefinedinstruction_bounce;
  347         undefined_init();
  348         cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
  349         setttb(kernel_l1pt.pv_pa);
  350         cpu_tlb_flushID();
  351         cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
  352 
  353         /*
  354          * Pages were allocated during the secondary bootstrap for the
  355          * stacks for different CPU modes.
  356          * We must now set the r13 registers in the different CPU modes to
  357          * point to these stacks.
  358          * Since the ARM stacks use STMFD etc. we must set r13 to the top end
  359          * of the stack memory.
  360          */
  361         set_stackptr(PSR_IRQ32_MODE,
  362             irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
  363         set_stackptr(PSR_ABT32_MODE,
  364             abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
  365         set_stackptr(PSR_UND32_MODE,
  366             undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
  367 
  368 
  369 
  370         /*
  371          * We must now clean the cache again....
  372          * Cleaning may be done by reading new data to displace any
  373          * dirty data in the cache. This will have happened in setttb()
  374          * but since we are boot strapping the addresses used for the read
  375          * may have just been remapped and thus the cache could be out
  376          * of sync. A re-clean after the switch will cure this.
  377          * After booting there are no gross reloations of the kernel thus
  378          * this problem will not occur after initarm().
  379          */
  380 /*      cpu_idcache_wbinv_all();*/
  381 
  382 
  383         bootverbose = 1;
  384 
  385         /* Set stack for exception handlers */
  386         
  387         proc_linkup(&proc0, &ksegrp0, &thread0);
  388         thread0.td_kstack = kernelstack.pv_va;
  389         thread0.td_pcb = (struct pcb *)
  390                 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
  391         thread0.td_pcb->pcb_flags = 0;
  392         thread0.td_frame = &proc0_tf;
  393         
  394         
  395         /* Enable MMU, I-cache, D-cache, write buffer. */
  396 
  397         cpufunc_control(0x337f, 0x107d);
  398         got_mmu = 1;
  399         arm_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
  400 
  401         pmap_curmaxkvaddr = freemempos + KERNEL_PT_VMDATA_NUM * 0x400000;
  402 
  403         pmap_bootstrap(freemempos, 
  404             0xd0000000, &kernel_l1pt);
  405 
  406         
  407         mutex_init();
  408         
  409         
  410         phys_avail[0] = round_page(virtual_avail);
  411         phys_avail[1] = 0xc0000000 + 0x02000000 - 1;
  412         phys_avail[2] = 0;
  413         phys_avail[3] = 0;
  414         
  415         /* Do basic tuning, hz etc */
  416         init_param1();
  417         init_param2(physmem);
  418         kdb_init();
  419         avail_end = 0xc0000000 + 0x02000000 - 1;
  420         return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
  421             sizeof(struct pcb)));
  422 }

Cache object: af34faf67aecc8de51ea38d1b099f95f


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.