1 /* $NetBSD: kloader_machdep.c,v 1.7 2014/03/08 17:05:08 skrll Exp $ */ 2 3 /*- 4 * Copyright (C) 2009-2012 NONAKA Kimihiro <nonaka@netbsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: kloader_machdep.c,v 1.7 2014/03/08 17:05:08 skrll Exp $"); 30 31 #include "debug_kloader.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 #include <sys/disklabel.h> 37 38 #include <machine/kloader.h> 39 #include <machine/pmap.h> 40 41 #include <arm/cpufunc.h> 42 #include <arm/xscale/pxa2x0reg.h> 43 44 #include <zaurus/zaurus/zaurus_var.h> 45 46 #define KERNEL_TEXT_BASE ((vaddr_t)&KERNEL_BASE_virt) 47 48 kloader_jumpfunc_t kloader_zaurus_jump __attribute__((__noreturn__)); 49 kloader_bootfunc_t kloader_zaurus_boot __attribute__((__noreturn__)); 50 void kloader_zaurus_reset(void); 51 52 struct kloader_ops kloader_zaurus_ops = { 53 .jump = kloader_zaurus_jump, 54 .boot = kloader_zaurus_boot, 55 .reset = kloader_zaurus_reset, 56 }; 57 58 void 59 kloader_reboot_setup(const char *filename) 60 { 61 62 __kloader_reboot_setup(&kloader_zaurus_ops, filename); 63 } 64 65 void 66 kloader_zaurus_reset(void) 67 { 68 69 zaurus_restart(); 70 /*NOTREACHED*/ 71 } 72 73 void 74 kloader_zaurus_jump(kloader_bootfunc_t func, vaddr_t sp, 75 struct kloader_bootinfo *kbi, struct kloader_page_tag *tag) 76 { 77 extern int kloader_howto; 78 extern char KERNEL_BASE_virt[]; 79 void (*bootinfop)(void *, void *); 80 uint32_t *bootmagicp; 81 vaddr_t ptr; 82 struct bootinfo *bootinfo; 83 struct btinfo_howto *bi_howto; 84 struct btinfo_rootdevice *bi_rootdv; 85 86 disable_interrupts(I32_bit|F32_bit); 87 88 /* copy 2nd boot-loader to va=pa page */ 89 bootinfop = (void *)(KERNEL_TEXT_BASE - PAGE_SIZE); 90 memmove(bootinfop, func, PAGE_SIZE); 91 92 /* 93 * make bootinfo 94 */ 95 bootmagicp = (uint32_t *)(KERNEL_TEXT_BASE - BOOTARGS_BUFSIZ); 96 memset(bootmagicp, 0, BOOTARGS_BUFSIZ); 97 bootinfo = (struct bootinfo *)(bootmagicp + 1); 98 bootinfo->nentries = 0; 99 ptr = (vaddr_t)bootinfo->info; 100 101 /* pass to howto for new kernel */ 102 bi_howto = (struct btinfo_howto *)ptr; 103 bi_howto->common.len = sizeof(struct btinfo_howto); 104 bi_howto->common.type = BTINFO_HOWTO; 105 bi_howto->howto = kloader_howto; 106 bootinfo->nentries++; 107 ptr += bi_howto->common.len; 108 109 /* set previous root device for new boot device */ 110 if (root_device != NULL 111 && device_class(root_device) == DV_DISK 112 && !device_is_a(root_device, "dk")) { 113 bi_rootdv = (struct btinfo_rootdevice *)ptr; 114 bi_rootdv->common.len = sizeof(struct btinfo_rootdevice); 115 bi_rootdv->common.type = BTINFO_ROOTDEVICE; 116 snprintf(bi_rootdv->devname, sizeof(bi_rootdv->devname), "%s%c", 117 device_xname(root_device), (int)DISKPART(rootdev) + 'a'); 118 bootinfo->nentries++; 119 ptr += bi_rootdv->common.len; 120 } 121 122 *bootmagicp = BOOTARGS_MAGIC; 123 cpu_idcache_wbinv_all(); 124 125 /* jump to 2nd boot-loader */ 126 (*bootinfop)(kbi, tag); 127 128 /*NOTREACHED*/ 129 for (;;) 130 continue; 131 } 132 133 /* 134 * Physcal address to virtual address 135 */ 136 vaddr_t 137 kloader_phystov(paddr_t pa) 138 { 139 vaddr_t va; 140 int error; 141 142 va = KERNEL_BASE + pa - PXA2X0_SDRAM0_START; 143 error = pmap_enter(pmap_kernel(), va, pa, VM_PROT_ALL, 0); 144 if (error) { 145 printf("%s: map failed: pa=0x%lx, va=0x%lx, error=%d\n", 146 __func__, pa, va, error); 147 } 148 return va; 149 } 150