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ed4e46bdce
result of a joined effort with parts contributed by Doug Rabson, Warner Losh and Stefan Esser (hope I did not forget anybody). Part of the sources is obtained from NetBSD with modifications. This code is work in progress: As of the time of the initial import, a loader.exe executable is built, which can be loaded on an Alpha with NT only firmware, but no attempt is made to switch to OSF PAL code as required to start an actual kernel.
204 lines
6 KiB
C
204 lines
6 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: bootinfo.c,v 1.3 1998/10/15 21:55:58 dfr Exp $
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*/
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#include <stand.h>
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#include <string.h>
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#include <sys/param.h>
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#include <sys/reboot.h>
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#include <sys/linker.h>
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#include <machine/elf.h>
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#include <machine/prom.h>
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#include <machine/rpb.h>
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#include <machine/bootinfo.h>
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#include "bootstrap.h"
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/*
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* Copy the environment into the load area starting at (addr).
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* Each variable is formatted as <name>=<value>, with a single nul
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* separating each variable, and a double nul terminating the environment.
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*/
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vm_offset_t
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bi_copyenv(vm_offset_t addr)
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{
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struct env_var *ep;
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/* traverse the environment */
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for (ep = environ; ep != NULL; ep = ep->ev_next) {
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alpha_copyin(ep->ev_name, addr, strlen(ep->ev_name));
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addr += strlen(ep->ev_name);
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alpha_copyin("=", addr, 1);
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addr++;
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if (ep->ev_value != NULL) {
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alpha_copyin(ep->ev_value, addr, strlen(ep->ev_value));
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addr += strlen(ep->ev_value);
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}
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alpha_copyin("", addr, 1);
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addr++;
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}
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alpha_copyin("", addr, 1);
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addr++;
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return(addr);
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}
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/*
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* Copy module-related data into the load area, where it can be
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* used as a directory for loaded modules.
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*
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* Module data is presented in a self-describing format. Each datum
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* is preceeded by a 32-bit identifier and a 32-bit size field.
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*
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* Currently, the following data are saved:
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*
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* MOD_NAME (variable) module name (string)
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* MOD_TYPE (variable) module type (string)
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* MOD_ADDR sizeof(vm_offset_t) module load address
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* MOD_SIZE sizeof(size_t) module size
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* MOD_METADATA (variable) type-specific metadata
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*/
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#define COPY32(v, a) { \
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u_int32_t x = (v); \
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alpha_copyin(&x, a, sizeof(x)); \
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a += sizeof(x); \
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}
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#define MOD_STR(t, a, s) { \
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COPY32(t, a); \
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COPY32(strlen(s) + 1, a); \
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alpha_copyin(s, a, strlen(s) + 1); \
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a += roundup(strlen(s) + 1, sizeof(u_int64_t));\
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}
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#define MOD_NAME(a, s) MOD_STR(MODINFO_NAME, a, s)
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#define MOD_TYPE(a, s) MOD_STR(MODINFO_TYPE, a, s)
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#define MOD_VAR(t, a, s) { \
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COPY32(t, a); \
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COPY32(sizeof(s), a); \
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alpha_copyin(&s, a, sizeof(s)); \
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a += roundup(sizeof(s), sizeof(u_int64_t)); \
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}
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#define MOD_ADDR(a, s) MOD_VAR(MODINFO_ADDR, a, s)
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#define MOD_SIZE(a, s) MOD_VAR(MODINFO_SIZE, a, s)
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#define MOD_METADATA(a, mm) { \
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COPY32(MODINFO_METADATA | mm->md_type, a); \
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COPY32(mm->md_size, a); \
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alpha_copyin(mm->md_data, a, mm->md_size); \
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a += roundup(mm->md_size, sizeof(u_int64_t));\
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}
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#define MOD_END(a) { \
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COPY32(MODINFO_END, a); \
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COPY32(0, a); \
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}
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vm_offset_t
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bi_copymodules(vm_offset_t addr)
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{
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struct loaded_module *mp;
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struct module_metadata *md;
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/* start with the first module on the list, should be the kernel */
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for (mp = mod_findmodule(NULL, NULL); mp != NULL; mp = mp->m_next) {
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MOD_NAME(addr, mp->m_name); /* this field must come first */
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MOD_TYPE(addr, mp->m_type);
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MOD_ADDR(addr, mp->m_addr);
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MOD_SIZE(addr, mp->m_size);
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for (md = mp->m_metadata; md != NULL; md = md->md_next)
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if (!(md->md_type & MODINFOMD_NOCOPY))
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MOD_METADATA(addr, md);
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}
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MOD_END(addr);
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return(addr);
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}
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/*
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* Load the information expected by an alpha kernel.
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*
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* - The kernel environment is copied into kernel space.
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* - Module metadata are formatted and placed in kernel space.
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*/
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int
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bi_load(struct bootinfo_v1 *bi, vm_offset_t *ffp_save,
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struct loaded_module *mp)
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{
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struct loaded_module *xp;
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vm_offset_t addr, bootinfo_addr;
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u_int pad;
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vm_offset_t ssym, esym;
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struct module_metadata *md;
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ssym = esym = 0;
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if ((md = mod_findmetadata(mp, MODINFOMD_SSYM)) != NULL)
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ssym = *((vm_offset_t *)&(md->md_data));
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if ((md = mod_findmetadata(mp, MODINFOMD_ESYM)) != NULL)
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esym = *((vm_offset_t *)&(md->md_data));
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if (ssym == 0 || esym == 0)
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ssym = esym = 0; /* sanity */
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bi->ssym = ssym;
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bi->esym = esym;
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/* find the last module in the chain */
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addr = 0;
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for (xp = mod_findmodule(NULL, NULL); xp != NULL; xp = xp->m_next) {
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if (addr < (xp->m_addr + xp->m_size))
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addr = xp->m_addr + xp->m_size;
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}
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/* pad to a page boundary */
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pad = (u_int)addr & PAGE_MASK;
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if (pad != 0) {
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pad = PAGE_SIZE - pad;
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addr += pad;
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}
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/* copy our environment */
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bi->envp = (char *)addr;
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addr = bi_copyenv(addr);
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/* pad to a page boundary */
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pad = (u_int)addr & PAGE_MASK;
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if (pad != 0) {
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pad = PAGE_SIZE - pad;
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addr += pad;
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}
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/* copy module list and metadata */
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bi->modptr = addr;
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addr = bi_copymodules(addr);
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/* all done copying stuff in, save end of loaded object space */
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bi->kernend = addr;
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*ffp_save = ALPHA_K0SEG_TO_PHYS((addr + PAGE_MASK) & ~PAGE_MASK)
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>> PAGE_SHIFT;
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*ffp_save += 2; /* XXX OSF/1 does this, no idea why. */
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return(0);
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}
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