03479763b2
available on firmwares 3.15 and earlier. Caveats: Support for the internal SATA controller is currently missing, as is support for framebuffer resolutions other than 720x480. These deficiencies will be remedied soon. Special thanks to Peter Grehan for providing the hardware that made this port possible, and thanks to Geoff Levand of Sony Computer Entertainment for advice on the LV1 hypervisor.
356 lines
9.4 KiB
C
356 lines
9.4 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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* from: FreeBSD: src/sys/boot/sparc64/loader/metadata.c,v 1.6
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.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/metadata.h>
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#include "bootstrap.h"
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/*
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* Return a 'boothowto' value corresponding to the kernel arguments in
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* (kargs) and any relevant environment variables.
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*/
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static struct
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{
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const char *ev;
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int mask;
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} howto_names[] = {
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{"boot_askname", RB_ASKNAME},
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{"boot_cdrom", RB_CDROM},
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{"boot_ddb", RB_KDB},
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{"boot_dfltroot", RB_DFLTROOT},
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{"boot_gdb", RB_GDB},
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{"boot_multicons", RB_MULTIPLE},
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{"boot_mute", RB_MUTE},
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{"boot_pause", RB_PAUSE},
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{"boot_serial", RB_SERIAL},
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{"boot_single", RB_SINGLE},
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{"boot_verbose", RB_VERBOSE},
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{NULL, 0}
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};
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int
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md_getboothowto(char *kargs)
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{
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char *cp;
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int howto;
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int active;
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int i;
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/* Parse kargs */
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howto = 0;
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if (kargs != NULL) {
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cp = kargs;
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active = 0;
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while (*cp != 0) {
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if (!active && (*cp == '-')) {
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active = 1;
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} else if (active)
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switch (*cp) {
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case 'a':
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howto |= RB_ASKNAME;
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break;
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case 'C':
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howto |= RB_CDROM;
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break;
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case 'd':
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howto |= RB_KDB;
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break;
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case 'D':
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howto |= RB_MULTIPLE;
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break;
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case 'm':
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howto |= RB_MUTE;
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break;
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case 'g':
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howto |= RB_GDB;
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break;
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case 'h':
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howto |= RB_SERIAL;
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break;
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case 'p':
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howto |= RB_PAUSE;
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break;
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case 'r':
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howto |= RB_DFLTROOT;
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break;
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case 's':
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howto |= RB_SINGLE;
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break;
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case 'v':
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howto |= RB_VERBOSE;
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break;
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default:
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active = 0;
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break;
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}
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cp++;
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}
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}
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/* get equivalents from the environment */
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for (i = 0; howto_names[i].ev != NULL; i++)
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if (getenv(howto_names[i].ev) != NULL)
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howto |= howto_names[i].mask;
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if (!strcmp(getenv("console"), "comconsole"))
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howto |= RB_SERIAL;
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if (!strcmp(getenv("console"), "nullconsole"))
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howto |= RB_MUTE;
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return(howto);
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}
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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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md_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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archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name));
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addr += strlen(ep->ev_name);
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archsw.arch_copyin("=", addr, 1);
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addr++;
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if (ep->ev_value != NULL) {
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archsw.arch_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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archsw.arch_copyin("", addr, 1);
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addr++;
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}
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archsw.arch_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 preceded 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_ARGS (variable) module parameters (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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static int align;
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#define COPY32(v, a, c) { \
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u_int32_t x = (v); \
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if (c) \
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archsw.arch_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, c) { \
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COPY32(t, a, c); \
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COPY32(strlen(s) + 1, a, c) \
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if (c) \
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archsw.arch_copyin(s, a, strlen(s) + 1);\
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a += roundup(strlen(s) + 1, align); \
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}
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#define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
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#define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
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#define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
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#define MOD_VAR(t, a, s, c) { \
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COPY32(t, a, c); \
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COPY32(sizeof(s), a, c); \
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if (c) \
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archsw.arch_copyin(&s, a, sizeof(s)); \
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a += roundup(sizeof(s), align); \
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}
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#define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
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#define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
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#define MOD_METADATA(a, mm, c) { \
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COPY32(MODINFO_METADATA | mm->md_type, a, c);\
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COPY32(mm->md_size, a, c); \
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if (c) \
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archsw.arch_copyin(mm->md_data, a, mm->md_size);\
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a += roundup(mm->md_size, align); \
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}
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#define MOD_END(a, c) { \
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COPY32(MODINFO_END, a, c); \
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COPY32(0, a, c); \
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}
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vm_offset_t
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md_copymodules(vm_offset_t addr, int kern64)
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{
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struct preloaded_file *fp;
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struct file_metadata *md;
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uint64_t scratch64;
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int c;
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c = addr != 0;
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/* start with the first module on the list, should be the kernel */
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for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
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MOD_NAME(addr, fp->f_name, c); /* this field must come first */
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MOD_TYPE(addr, fp->f_type, c);
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if (fp->f_args)
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MOD_ARGS(addr, fp->f_args, c);
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if (kern64) {
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scratch64 = fp->f_addr;
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MOD_ADDR(addr, scratch64, c);
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scratch64 = fp->f_size;
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MOD_SIZE(addr, scratch64, c);
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} else {
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MOD_ADDR(addr, fp->f_addr, c);
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MOD_SIZE(addr, fp->f_size, c);
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}
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for (md = fp->f_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, c);
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}
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}
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}
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MOD_END(addr, c);
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return(addr);
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}
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/*
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* Load the information expected by a powerpc kernel.
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*
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* - The 'boothowto' argument is constructed
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* - The 'bootdev' argument is constructed
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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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md_load_dual(char *args, vm_offset_t *modulep, int kern64)
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{
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struct preloaded_file *kfp;
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struct preloaded_file *xp;
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struct file_metadata *md;
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vm_offset_t kernend;
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vm_offset_t addr;
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vm_offset_t envp;
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vm_offset_t size;
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uint64_t scratch64;
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char *rootdevname;
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int howto;
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align = kern64 ? 8 : 4;
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howto = md_getboothowto(args);
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/*
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* Allow the environment variable 'rootdev' to override the supplied device
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* This should perhaps go to MI code and/or have $rootdev tested/set by
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* MI code before launching the kernel.
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*/
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rootdevname = getenv("rootdev");
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if (rootdevname == NULL)
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rootdevname = getenv("currdev");
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/* Try reading the /etc/fstab file to select the root device */
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getrootmount(rootdevname);
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/* find the last module in the chain */
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addr = 0;
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for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
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if (addr < (xp->f_addr + xp->f_size))
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addr = xp->f_addr + xp->f_size;
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}
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/* pad to a page boundary */
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addr = roundup(addr, PAGE_SIZE);
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/* copy our environment */
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envp = addr;
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addr = md_copyenv(addr);
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/* pad to a page boundary */
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addr = roundup(addr, PAGE_SIZE);
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kernend = 0;
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kfp = file_findfile(NULL, kern64 ? "elf64 kernel" : "elf32 kernel");
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if (kfp == NULL)
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kfp = file_findfile(NULL, "elf kernel");
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if (kfp == NULL)
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panic("can't find kernel file");
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file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
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if (kern64) {
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scratch64 = envp;
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file_addmetadata(kfp, MODINFOMD_ENVP, sizeof scratch64, &scratch64);
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scratch64 = kernend;
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file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof scratch64, &scratch64);
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} else {
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file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
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file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
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}
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*modulep = addr;
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size = md_copymodules(0, kern64);
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kernend = roundup(addr + size, PAGE_SIZE);
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md = file_findmetadata(kfp, MODINFOMD_KERNEND);
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if (kern64) {
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scratch64 = kernend;
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bcopy(&scratch64, md->md_data, sizeof scratch64);
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} else {
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bcopy(&kernend, md->md_data, sizeof kernend);
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}
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(void)md_copymodules(addr, kern64);
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return(0);
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}
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int
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md_load(char *args, vm_offset_t *modulep)
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{
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return (md_load_dual(args, modulep, 0));
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}
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int
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md_load64(char *args, vm_offset_t *modulep)
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{
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return (md_load_dual(args, modulep, 1));
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}
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