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Diffstat (limited to 'stand/powerpc/kboot/metadata.c')
-rw-r--r--stand/powerpc/kboot/metadata.c343
1 files changed, 343 insertions, 0 deletions
diff --git a/stand/powerpc/kboot/metadata.c b/stand/powerpc/kboot/metadata.c
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+++ b/stand/powerpc/kboot/metadata.c
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+/*-
+ * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
+ * 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.
+ *
+ * from: FreeBSD: src/sys/boot/sparc64/loader/metadata.c,v 1.6
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stand.h>
+#include <sys/param.h>
+#include <sys/reboot.h>
+#include <sys/linker.h>
+#include <sys/boot.h>
+#include <fdt_platform.h>
+
+#include <machine/metadata.h>
+
+#include "bootstrap.h"
+
+int
+md_getboothowto(char *kargs)
+{
+ char *cp;
+ int howto;
+ int active;
+ int i;
+
+ /* Parse kargs */
+ howto = 0;
+ if (kargs != NULL) {
+ cp = kargs;
+ active = 0;
+ while (*cp != 0) {
+ if (!active && (*cp == '-')) {
+ active = 1;
+ } else if (active)
+ switch (*cp) {
+ case 'a':
+ howto |= RB_ASKNAME;
+ break;
+ case 'C':
+ howto |= RB_CDROM;
+ break;
+ case 'd':
+ howto |= RB_KDB;
+ break;
+ case 'D':
+ howto |= RB_MULTIPLE;
+ break;
+ case 'm':
+ howto |= RB_MUTE;
+ break;
+ case 'g':
+ howto |= RB_GDB;
+ break;
+ case 'h':
+ howto |= RB_SERIAL;
+ break;
+ case 'p':
+ howto |= RB_PAUSE;
+ break;
+ case 'r':
+ howto |= RB_DFLTROOT;
+ break;
+ case 's':
+ howto |= RB_SINGLE;
+ break;
+ case 'v':
+ howto |= RB_VERBOSE;
+ break;
+ default:
+ active = 0;
+ break;
+ }
+ cp++;
+ }
+ }
+ /* get equivalents from the environment */
+ for (i = 0; howto_names[i].ev != NULL; i++)
+ if (getenv(howto_names[i].ev) != NULL)
+ howto |= howto_names[i].mask;
+ if (!strcmp(getenv("console"), "comconsole"))
+ howto |= RB_SERIAL;
+ if (!strcmp(getenv("console"), "nullconsole"))
+ howto |= RB_MUTE;
+ return(howto);
+}
+
+/*
+ * Copy the environment into the load area starting at (addr).
+ * Each variable is formatted as <name>=<value>, with a single nul
+ * separating each variable, and a double nul terminating the environment.
+ */
+vm_offset_t
+md_copyenv(vm_offset_t addr)
+{
+ struct env_var *ep;
+
+ /* traverse the environment */
+ for (ep = environ; ep != NULL; ep = ep->ev_next) {
+ archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name));
+ addr += strlen(ep->ev_name);
+ archsw.arch_copyin("=", addr, 1);
+ addr++;
+ if (ep->ev_value != NULL) {
+ archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value));
+ addr += strlen(ep->ev_value);
+ }
+ archsw.arch_copyin("", addr, 1);
+ addr++;
+ }
+ archsw.arch_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
+ */
+
+static int align;
+
+#define COPY32(v, a, c) { \
+ u_int32_t x = (v); \
+ if (c) \
+ archsw.arch_copyin(&x, a, sizeof(x)); \
+ a += sizeof(x); \
+}
+
+#define MOD_STR(t, a, s, c) { \
+ COPY32(t, a, c); \
+ COPY32(strlen(s) + 1, a, c) \
+ if (c) \
+ archsw.arch_copyin(s, a, strlen(s) + 1);\
+ a += roundup(strlen(s) + 1, align); \
+}
+
+#define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
+#define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
+#define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
+
+#define MOD_VAR(t, a, s, c) { \
+ COPY32(t, a, c); \
+ COPY32(sizeof(s), a, c); \
+ if (c) \
+ archsw.arch_copyin(&s, a, sizeof(s)); \
+ a += roundup(sizeof(s), align); \
+}
+
+#define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
+#define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
+
+#define MOD_METADATA(a, mm, c) { \
+ COPY32(MODINFO_METADATA | mm->md_type, a, c);\
+ COPY32(mm->md_size, a, c); \
+ if (c) \
+ archsw.arch_copyin(mm->md_data, a, mm->md_size);\
+ a += roundup(mm->md_size, align); \
+}
+
+#define MOD_END(a, c) { \
+ COPY32(MODINFO_END, a, c); \
+ COPY32(0, a, c); \
+}
+
+vm_offset_t
+md_copymodules(vm_offset_t addr, int kern64)
+{
+ struct preloaded_file *fp;
+ struct file_metadata *md;
+ uint64_t scratch64;
+ int c;
+
+ c = addr != 0;
+ /* start with the first module on the list, should be the kernel */
+ for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
+
+ MOD_NAME(addr, fp->f_name, c); /* this field must come first */
+ MOD_TYPE(addr, fp->f_type, c);
+ if (fp->f_args)
+ MOD_ARGS(addr, fp->f_args, c);
+ if (kern64) {
+ scratch64 = fp->f_addr;
+ MOD_ADDR(addr, scratch64, c);
+ scratch64 = fp->f_size;
+ MOD_SIZE(addr, scratch64, c);
+ } else {
+ MOD_ADDR(addr, fp->f_addr, c);
+ MOD_SIZE(addr, fp->f_size, c);
+ }
+ for (md = fp->f_metadata; md != NULL; md = md->md_next) {
+ if (!(md->md_type & MODINFOMD_NOCOPY)) {
+ MOD_METADATA(addr, md, c);
+ }
+ }
+ }
+ MOD_END(addr, c);
+ return(addr);
+}
+
+/*
+ * Load the information expected by a powerpc kernel.
+ *
+ * - The 'boothowto' argument is constructed
+ * - The 'bootdev' argument is constructed
+ * - The kernel environment is copied into kernel space.
+ * - Module metadata are formatted and placed in kernel space.
+ */
+int
+md_load_dual(char *args, vm_offset_t *modulep, vm_offset_t *dtb, int kern64)
+{
+ struct preloaded_file *kfp;
+ struct preloaded_file *xp;
+ struct file_metadata *md;
+ vm_offset_t kernend;
+ vm_offset_t addr;
+ vm_offset_t envp;
+ vm_offset_t fdtp;
+ vm_offset_t size;
+ uint64_t scratch64;
+ char *rootdevname;
+ int howto;
+
+ align = kern64 ? 8 : 4;
+ howto = md_getboothowto(args);
+
+ /*
+ * 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");
+ if (rootdevname == NULL)
+ rootdevname = getenv("currdev");
+ /* Try reading the /etc/fstab file to select the root device */
+ getrootmount(rootdevname);
+
+ /* find the last module in the chain */
+ addr = 0;
+ 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);
+
+ /* copy our environment */
+ envp = addr;
+ addr = md_copyenv(addr);
+
+ /* pad to a page boundary */
+ addr = roundup(addr, PAGE_SIZE);
+
+ /* Copy out FDT */
+ size = fdt_copy(addr);
+ *dtb = fdtp = addr;
+ addr = roundup(addr + size, PAGE_SIZE);
+
+ kernend = 0;
+ kfp = file_findfile(NULL, kern64 ? "elf64 kernel" : "elf32 kernel");
+ if (kfp == NULL)
+ kfp = file_findfile(NULL, "elf kernel");
+ if (kfp == NULL)
+ panic("can't find kernel file");
+ file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
+ if (kern64) {
+ scratch64 = envp;
+ file_addmetadata(kfp, MODINFOMD_ENVP, sizeof scratch64, &scratch64);
+ scratch64 = fdtp;
+ file_addmetadata(kfp, MODINFOMD_DTBP, sizeof scratch64, &scratch64);
+ scratch64 = kernend;
+ file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof scratch64, &scratch64);
+ } else {
+ file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
+ file_addmetadata(kfp, MODINFOMD_DTBP, sizeof fdtp, &fdtp);
+ file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
+ }
+
+ *modulep = addr;
+ size = md_copymodules(0, kern64);
+ kernend = roundup(addr + size, PAGE_SIZE);
+
+ md = file_findmetadata(kfp, MODINFOMD_KERNEND);
+ if (kern64) {
+ scratch64 = kernend;
+ bcopy(&scratch64, md->md_data, sizeof scratch64);
+ } else {
+ bcopy(&kernend, md->md_data, sizeof kernend);
+ }
+
+ (void)md_copymodules(addr, kern64);
+
+ return(0);
+}
+
+int
+md_load(char *args, vm_offset_t *modulep, vm_offset_t *dtb)
+{
+ return (md_load_dual(args, modulep, dtb, 0));
+}
+
+int
+md_load64(char *args, vm_offset_t *modulep, vm_offset_t *dtb)
+{
+ return (md_load_dual(args, modulep, dtb, 1));
+}
+
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