/*- * Copyright (c) 1998 Michael Smith * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: src/sys/boot/alpha/libalpha/bootinfo.c,v 1.9.2.1 2001/03/04 05:20:26 obrien Exp $ */ #include #include #include #include #include #include #include #include #include #include "bootstrap.h" extern char *alpha_fmtdev(void *vdev); /* * Copy the environment into the load area starting at (addr). * Each variable is formatted as =, with a single nul * separating each variable, and a double nul terminating the environment. */ vm_offset_t bi_copyenv(vm_offset_t addr) { struct env_var *ep; /* traverse the environment */ for (ep = environ; ep != NULL; ep = ep->ev_next) { alpha_copyin(ep->ev_name, addr, strlen(ep->ev_name)); addr += strlen(ep->ev_name); alpha_copyin("=", addr, 1); addr++; if (ep->ev_value != NULL) { alpha_copyin(ep->ev_value, addr, strlen(ep->ev_value)); addr += strlen(ep->ev_value); } alpha_copyin("", addr, 1); addr++; } alpha_copyin("", addr, 1); addr++; return(addr); } /* * Copy module-related data into the load area, where it can be * used as a directory for loaded modules. * * Module data is presented in a self-describing format. Each datum * is preceded by a 32-bit identifier and a 32-bit size field. * * Currently, the following data are saved: * * MOD_NAME (variable) module name (string) * MOD_TYPE (variable) module type (string) * MOD_ARGS (variable) module parameters (string) * MOD_ADDR sizeof(vm_offset_t) module load address * MOD_SIZE sizeof(size_t) module size * MOD_METADATA (variable) type-specific metadata */ #define COPY32(v, a) { \ u_int32_t x = (v); \ alpha_copyin(&x, a, sizeof(x)); \ a += sizeof(x); \ } #define MOD_STR(t, a, s) { \ COPY32(t, a); \ COPY32(strlen(s) + 1, a); \ alpha_copyin(s, a, strlen(s) + 1); \ a += roundup(strlen(s) + 1, sizeof(u_int64_t));\ } #define MOD_NAME(a, s) MOD_STR(MODINFO_NAME, a, s) #define MOD_TYPE(a, s) MOD_STR(MODINFO_TYPE, a, s) #define MOD_ARGS(a, s) MOD_STR(MODINFO_ARGS, a, s) #define MOD_VAR(t, a, s) { \ COPY32(t, a); \ COPY32(sizeof(s), a); \ alpha_copyin(&s, a, sizeof(s)); \ a += roundup(sizeof(s), sizeof(u_int64_t)); \ } #define MOD_ADDR(a, s) MOD_VAR(MODINFO_ADDR, a, s) #define MOD_SIZE(a, s) MOD_VAR(MODINFO_SIZE, a, s) #define MOD_METADATA(a, mm) { \ COPY32(MODINFO_METADATA | mm->md_type, a); \ COPY32(mm->md_size, a); \ alpha_copyin(mm->md_data, a, mm->md_size); \ a += roundup(mm->md_size, sizeof(u_int64_t));\ } #define MOD_END(a) { \ COPY32(MODINFO_END, a); \ COPY32(0, a); \ } vm_offset_t bi_copymodules(vm_offset_t addr) { struct loaded_module *mp; struct module_metadata *md; /* start with the first module on the list, should be the kernel */ for (mp = mod_findmodule(NULL, NULL); mp != NULL; mp = mp->m_next) { MOD_NAME(addr, mp->m_name); /* this field must come first */ MOD_TYPE(addr, mp->m_type); if (mp->m_args) MOD_ARGS(addr, mp->m_args); MOD_ADDR(addr, mp->m_addr); MOD_SIZE(addr, mp->m_size); for (md = mp->m_metadata; md != NULL; md = md->md_next) if (!(md->md_type & MODINFOMD_NOCOPY)) MOD_METADATA(addr, md); } MOD_END(addr); return(addr); } /* * Load the information expected by an alpha kernel. * * - The kernel environment is copied into kernel space. * - Module metadata are formatted and placed in kernel space. */ int bi_load(struct bootinfo_v1 *bi, vm_offset_t *ffp_save, struct loaded_module *mp) { char *rootdevname; struct alpha_devdesc *rootdev; struct loaded_module *xp; vm_offset_t addr, bootinfo_addr; u_int pad; char *kernelname; vm_offset_t ssym, esym; struct module_metadata *md; /* * Allow the environment variable 'rootdev' to override the supplied device * This should perhaps go to MI code and/or have $rootdev tested/set by * MI code before launching the kernel. */ rootdevname = getenv("rootdev"); alpha_getdev((void **)(&rootdev), rootdevname, NULL); if (rootdev == NULL) { /* bad $rootdev/$currdev */ printf("can't determine root device\n"); return(EINVAL); } /* Try reading the /etc/fstab file to select the root device */ getrootmount(alpha_fmtdev((void *)rootdev)); free(rootdev); ssym = esym = 0; if ((md = mod_findmetadata(mp, MODINFOMD_SSYM)) != NULL) ssym = *((vm_offset_t *)&(md->md_data)); if ((md = mod_findmetadata(mp, MODINFOMD_ESYM)) != NULL) esym = *((vm_offset_t *)&(md->md_data)); if (ssym == 0 || esym == 0) ssym = esym = 0; /* sanity */ bi->ssym = ssym; bi->esym = esym; /* find the last module in the chain */ addr = 0; for (xp = mod_findmodule(NULL, NULL); xp != NULL; xp = xp->m_next) { if (addr < (xp->m_addr + xp->m_size)) addr = xp->m_addr + xp->m_size; } /* pad to a page boundary */ pad = (u_int)addr & PAGE_MASK; if (pad != 0) { pad = PAGE_SIZE - pad; addr += pad; } /* copy our environment */ bi->envp = (char *)addr; addr = bi_copyenv(addr); /* pad to a page boundary */ pad = (u_int)addr & PAGE_MASK; if (pad != 0) { pad = PAGE_SIZE - pad; addr += pad; } /* copy module list and metadata */ bi->modptr = addr; addr = bi_copymodules(addr); /* all done copying stuff in, save end of loaded object space */ bi->kernend = addr; *ffp_save = ALPHA_K0SEG_TO_PHYS((addr + PAGE_MASK) & ~PAGE_MASK) >> PAGE_SHIFT; *ffp_save += 2; /* XXX OSF/1 does this, no idea why. */ kernelname = getenv("kernelname"); if (kernelname) { strncpy(bi->booted_kernel, kernelname, sizeof(bi->booted_kernel) - 1); } return(0); }