573 lines
16 KiB
C
573 lines
16 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* Copyright (c) 2004, 2006 Marcel Moolenaar
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* Copyright (c) 2014 The FreeBSD Foundation
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/linker.h>
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#include <sys/reboot.h>
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#include <sys/boot.h>
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#include <machine/cpufunc.h>
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#include <machine/elf.h>
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#include <machine/metadata.h>
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#include <machine/psl.h>
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#include <efi.h>
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#include <efilib.h>
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#include "bootstrap.h"
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#include "loader_efi.h"
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#if defined(__amd64__)
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#include <machine/specialreg.h>
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#endif
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#include "gfx_fb.h"
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#if defined(LOADER_FDT_SUPPORT)
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#include <fdt_platform.h>
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#endif
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#ifdef LOADER_GELI_SUPPORT
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#include "geliboot.h"
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#endif
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int bi_load(char *args, vm_offset_t *modulep, vm_offset_t *kernendp,
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bool exit_bs);
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extern EFI_SYSTEM_TABLE *ST;
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static int
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bi_getboothowto(char *kargs)
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{
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const char *sw, *tmp;
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char *opts;
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char *console;
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int howto, speed, port;
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char buf[50];
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howto = boot_parse_cmdline(kargs);
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howto |= boot_env_to_howto();
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console = getenv("console");
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if (console != NULL) {
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if (strcmp(console, "comconsole") == 0)
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howto |= RB_SERIAL;
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if (strcmp(console, "nullconsole") == 0)
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howto |= RB_MUTE;
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#if defined(__i386__) || defined(__amd64__)
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if (strcmp(console, "efi") == 0 &&
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getenv("efi_8250_uid") != NULL &&
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getenv("hw.uart.console") == NULL) {
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/*
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* If we found a 8250 com port and com speed, we need to
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* tell the kernel where the serial port is, and how
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* fast. Ideally, we'd get the port from ACPI, but that
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* isn't running in the loader. Do the next best thing
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* by allowing it to be set by a loader.conf variable,
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* either a EFI specific one, or the compatible
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* comconsole_port if not. PCI support is needed, but
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* for that we'd ideally refactor the
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* libi386/comconsole.c code to have identical behavior.
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* We only try to set the port for cases where we saw
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* the Serial(x) node when parsing, otherwise
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* specialized hardware that has Uart nodes will have a
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* bogus address set.
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* But if someone specifically setup hw.uart.console,
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* don't override that.
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*/
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speed = -1;
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port = -1;
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tmp = getenv("efi_com_speed");
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if (tmp != NULL)
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speed = strtol(tmp, NULL, 0);
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tmp = getenv("efi_com_port");
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if (tmp == NULL)
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tmp = getenv("comconsole_port");
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if (tmp != NULL)
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port = strtol(tmp, NULL, 0);
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if (speed != -1 && port != -1) {
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snprintf(buf, sizeof(buf), "io:%d,br:%d", port,
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speed);
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env_setenv("hw.uart.console", EV_VOLATILE, buf,
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NULL, NULL);
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}
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}
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#endif
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}
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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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static vm_offset_t
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bi_copyenv(vm_offset_t start)
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{
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struct env_var *ep;
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vm_offset_t addr, last;
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size_t len;
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addr = last = start;
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/* Traverse the environment. */
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for (ep = environ; ep != NULL; ep = ep->ev_next) {
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len = strlen(ep->ev_name);
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if ((size_t)archsw.arch_copyin(ep->ev_name, addr, len) != len)
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break;
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addr += len;
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if (archsw.arch_copyin("=", addr, 1) != 1)
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break;
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addr++;
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if (ep->ev_value != NULL) {
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len = strlen(ep->ev_value);
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if ((size_t)archsw.arch_copyin(ep->ev_value, addr, len) != len)
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break;
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addr += len;
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}
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if (archsw.arch_copyin("", addr, 1) != 1)
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break;
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last = ++addr;
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}
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if (archsw.arch_copyin("", last++, 1) != 1)
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last = start;
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return(last);
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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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#define COPY32(v, a, c) { \
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uint32_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, sizeof(u_long)); \
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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), sizeof(u_long)); \
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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, sizeof(u_long)); \
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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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static vm_offset_t
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bi_copymodules(vm_offset_t addr)
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{
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struct preloaded_file *fp;
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struct file_metadata *md;
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int c;
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uint64_t v;
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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 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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v = fp->f_addr;
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#if defined(__arm__)
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v -= __elfN(relocation_offset);
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#endif
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MOD_ADDR(addr, v, c);
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v = fp->f_size;
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MOD_SIZE(addr, v, c);
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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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MOD_END(addr, c);
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return(addr);
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}
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static EFI_STATUS
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efi_do_vmap(EFI_MEMORY_DESCRIPTOR *mm, UINTN sz, UINTN mmsz, UINT32 mmver)
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{
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EFI_MEMORY_DESCRIPTOR *desc, *viter, *vmap;
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EFI_STATUS ret;
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int curr, ndesc, nset;
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nset = 0;
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desc = mm;
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ndesc = sz / mmsz;
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vmap = malloc(sz);
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if (vmap == NULL)
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/* This isn't really an EFI error case, but pretend it is */
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return (EFI_OUT_OF_RESOURCES);
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viter = vmap;
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for (curr = 0; curr < ndesc;
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curr++, desc = NextMemoryDescriptor(desc, mmsz)) {
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if ((desc->Attribute & EFI_MEMORY_RUNTIME) != 0) {
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++nset;
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desc->VirtualStart = desc->PhysicalStart;
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*viter = *desc;
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viter = NextMemoryDescriptor(viter, mmsz);
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}
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}
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ret = RS->SetVirtualAddressMap(nset * mmsz, mmsz, mmver, vmap);
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free(vmap);
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return (ret);
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}
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static int
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bi_load_efi_data(struct preloaded_file *kfp, bool exit_bs)
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{
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EFI_MEMORY_DESCRIPTOR *mm;
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EFI_PHYSICAL_ADDRESS addr = 0;
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EFI_STATUS status;
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const char *efi_novmap;
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size_t efisz;
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UINTN efi_mapkey;
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UINTN dsz, pages, retry, sz;
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UINT32 mmver;
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struct efi_map_header *efihdr;
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bool do_vmap;
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#if defined(__amd64__) || defined(__aarch64__)
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struct efi_fb efifb;
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efifb.fb_addr = gfx_state.tg_fb.fb_addr;
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efifb.fb_size = gfx_state.tg_fb.fb_size;
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efifb.fb_height = gfx_state.tg_fb.fb_height;
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efifb.fb_width = gfx_state.tg_fb.fb_width;
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efifb.fb_stride = gfx_state.tg_fb.fb_stride;
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efifb.fb_mask_red = gfx_state.tg_fb.fb_mask_red;
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efifb.fb_mask_green = gfx_state.tg_fb.fb_mask_green;
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efifb.fb_mask_blue = gfx_state.tg_fb.fb_mask_blue;
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efifb.fb_mask_reserved = gfx_state.tg_fb.fb_mask_reserved;
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printf("EFI framebuffer information:\n");
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printf("addr, size 0x%jx, 0x%jx\n", efifb.fb_addr, efifb.fb_size);
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printf("dimensions %d x %d\n", efifb.fb_width, efifb.fb_height);
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printf("stride %d\n", efifb.fb_stride);
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printf("masks 0x%08x, 0x%08x, 0x%08x, 0x%08x\n",
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efifb.fb_mask_red, efifb.fb_mask_green, efifb.fb_mask_blue,
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efifb.fb_mask_reserved);
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if (efifb.fb_addr != 0)
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file_addmetadata(kfp, MODINFOMD_EFI_FB, sizeof(efifb), &efifb);
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#endif
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do_vmap = true;
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efi_novmap = getenv("efi_disable_vmap");
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if (efi_novmap != NULL)
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do_vmap = strcasecmp(efi_novmap, "YES") != 0;
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efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
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/*
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* Assign size of EFI_MEMORY_DESCRIPTOR to keep compatible with
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* u-boot which doesn't fill this value when buffer for memory
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* descriptors is too small (eg. 0 to obtain memory map size)
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*/
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dsz = sizeof(EFI_MEMORY_DESCRIPTOR);
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/*
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* Allocate enough pages to hold the bootinfo block and the
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* memory map EFI will return to us. The memory map has an
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* unknown size, so we have to determine that first. Note that
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* the AllocatePages call can itself modify the memory map, so
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* we have to take that into account as well. The changes to
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* the memory map are caused by splitting a range of free
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* memory into two, so that one is marked as being loader
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* data.
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*/
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sz = 0;
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/*
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* Matthew Garrett has observed at least one system changing the
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* memory map when calling ExitBootServices, causing it to return an
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* error, probably because callbacks are allocating memory.
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* So we need to retry calling it at least once.
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*/
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for (retry = 2; retry > 0; retry--) {
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for (;;) {
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status = BS->GetMemoryMap(&sz, mm, &efi_mapkey, &dsz, &mmver);
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if (!EFI_ERROR(status))
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break;
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if (status != EFI_BUFFER_TOO_SMALL) {
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printf("%s: GetMemoryMap error %lu\n", __func__,
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EFI_ERROR_CODE(status));
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return (EINVAL);
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}
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if (addr != 0)
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BS->FreePages(addr, pages);
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/* Add 10 descriptors to the size to allow for
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* fragmentation caused by calling AllocatePages */
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sz += (10 * dsz);
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pages = EFI_SIZE_TO_PAGES(sz + efisz);
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status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
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pages, &addr);
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if (EFI_ERROR(status)) {
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printf("%s: AllocatePages error %lu\n", __func__,
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EFI_ERROR_CODE(status));
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return (ENOMEM);
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}
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/*
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* Read the memory map and stash it after bootinfo. Align the
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* memory map on a 16-byte boundary (the bootinfo block is page
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* aligned).
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*/
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efihdr = (struct efi_map_header *)(uintptr_t)addr;
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mm = (void *)((uint8_t *)efihdr + efisz);
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sz = (EFI_PAGE_SIZE * pages) - efisz;
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}
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if (!exit_bs)
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break;
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status = BS->ExitBootServices(IH, efi_mapkey);
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if (!EFI_ERROR(status))
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break;
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}
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if (retry == 0) {
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BS->FreePages(addr, pages);
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printf("ExitBootServices error %lu\n", EFI_ERROR_CODE(status));
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return (EINVAL);
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}
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/*
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* This may be disabled by setting efi_disable_vmap in
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* loader.conf(5). By default we will setup the virtual
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* map entries.
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*/
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if (do_vmap)
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efi_do_vmap(mm, sz, dsz, mmver);
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efihdr->memory_size = sz;
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efihdr->descriptor_size = dsz;
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efihdr->descriptor_version = mmver;
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file_addmetadata(kfp, MODINFOMD_EFI_MAP, efisz + sz,
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efihdr);
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return (0);
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}
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/*
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* Load the information expected by an amd64 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 'bootinfo' struct is constructed, and copied into the kernel space.
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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(char *args, vm_offset_t *modulep, vm_offset_t *kernendp, bool exit_bs)
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{
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struct preloaded_file *xp, *kfp;
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struct devdesc *rootdev;
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struct file_metadata *md;
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vm_offset_t addr;
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uint64_t kernend, module;
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uint64_t envp;
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vm_offset_t size;
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char *rootdevname;
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int howto;
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#if defined(LOADER_FDT_SUPPORT)
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vm_offset_t dtbp;
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int dtb_size;
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#endif
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#if defined(__arm__)
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vm_offset_t vaddr;
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size_t i;
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/*
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* These metadata addreses must be converted for kernel after
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* relocation.
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*/
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uint32_t mdt[] = {
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MODINFOMD_SSYM, MODINFOMD_ESYM, MODINFOMD_KERNEND,
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MODINFOMD_ENVP, MODINFOMD_FONT,
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#if defined(LOADER_FDT_SUPPORT)
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MODINFOMD_DTBP
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#endif
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};
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#endif
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howto = bi_getboothowto(args);
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/*
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* Allow the environment variable 'rootdev' to override the supplied
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* device. This should perhaps go to MI code and/or have $rootdev
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* tested/set by MI code before launching the kernel.
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*/
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rootdevname = getenv("rootdev");
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archsw.arch_getdev((void**)(&rootdev), rootdevname, NULL);
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if (rootdev == NULL) {
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printf("Can't determine root device.\n");
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return(EINVAL);
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}
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/* Try reading the /etc/fstab file to select the root device */
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getrootmount(efi_fmtdev((void *)rootdev));
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addr = 0;
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for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
|
|
if (addr < (xp->f_addr + xp->f_size))
|
|
addr = xp->f_addr + xp->f_size;
|
|
}
|
|
|
|
/* Pad to a page boundary. */
|
|
addr = roundup(addr, PAGE_SIZE);
|
|
|
|
addr = build_font_module(addr);
|
|
|
|
/* Pad to a page boundary. */
|
|
addr = roundup(addr, PAGE_SIZE);
|
|
|
|
/* Copy our environment. */
|
|
envp = addr;
|
|
addr = bi_copyenv(addr);
|
|
|
|
/* Pad to a page boundary. */
|
|
addr = roundup(addr, PAGE_SIZE);
|
|
|
|
#if defined(LOADER_FDT_SUPPORT)
|
|
/* Handle device tree blob */
|
|
dtbp = addr;
|
|
dtb_size = fdt_copy(addr);
|
|
|
|
/* Pad to a page boundary */
|
|
if (dtb_size)
|
|
addr += roundup(dtb_size, PAGE_SIZE);
|
|
#endif
|
|
|
|
kfp = file_findfile(NULL, "elf kernel");
|
|
if (kfp == NULL)
|
|
kfp = file_findfile(NULL, "elf64 kernel");
|
|
if (kfp == NULL)
|
|
panic("can't find kernel file");
|
|
kernend = 0; /* fill it in later */
|
|
|
|
/* Figure out the size and location of the metadata. */
|
|
module = *modulep = addr;
|
|
|
|
file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof(howto), &howto);
|
|
file_addmetadata(kfp, MODINFOMD_ENVP, sizeof(envp), &envp);
|
|
#if defined(LOADER_FDT_SUPPORT)
|
|
if (dtb_size)
|
|
file_addmetadata(kfp, MODINFOMD_DTBP, sizeof(dtbp), &dtbp);
|
|
else
|
|
printf("WARNING! Trying to fire up the kernel, but no "
|
|
"device tree blob found!\n");
|
|
#endif
|
|
file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof(kernend), &kernend);
|
|
#ifdef MODINFOMD_MODULEP
|
|
file_addmetadata(kfp, MODINFOMD_MODULEP, sizeof(module), &module);
|
|
#endif
|
|
file_addmetadata(kfp, MODINFOMD_FW_HANDLE, sizeof(ST), &ST);
|
|
#ifdef LOADER_GELI_SUPPORT
|
|
geli_export_key_metadata(kfp);
|
|
#endif
|
|
bi_load_efi_data(kfp, exit_bs);
|
|
|
|
size = bi_copymodules(0);
|
|
kernend = roundup(addr + size, PAGE_SIZE);
|
|
*kernendp = kernend;
|
|
|
|
/* patch MODINFOMD_KERNEND */
|
|
md = file_findmetadata(kfp, MODINFOMD_KERNEND);
|
|
bcopy(&kernend, md->md_data, sizeof kernend);
|
|
|
|
#if defined(__arm__)
|
|
*modulep -= __elfN(relocation_offset);
|
|
|
|
/* Do relocation fixup on metadata of each module. */
|
|
for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
|
|
for (i = 0; i < nitems(mdt); i++) {
|
|
md = file_findmetadata(xp, mdt[i]);
|
|
if (md) {
|
|
bcopy(md->md_data, &vaddr, sizeof vaddr);
|
|
vaddr -= __elfN(relocation_offset);
|
|
bcopy(&vaddr, md->md_data, sizeof vaddr);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Copy module list and metadata. */
|
|
(void)bi_copymodules(addr);
|
|
|
|
return (0);
|
|
}
|