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authorraj <raj@FreeBSD.org>2008-09-03 15:52:05 +0000
committerraj <raj@FreeBSD.org>2008-09-03 15:52:05 +0000
commitf2f831ec34bac2f429c2d4f0cca67bd7a0e549d8 (patch)
tree0863996505344198b549efa81e16e0f04c513f13 /sys/boot/uboot
parentc96f761ec1a0290b67e5d8a5396d883187b67221 (diff)
downloadFreeBSD-src-f2f831ec34bac2f429c2d4f0cca67bd7a0e549d8.zip
FreeBSD-src-f2f831ec34bac2f429c2d4f0cca67bd7a0e549d8.tar.gz
Make metadata.c shared across all platforms using U-Boot.
This will [soon] be needed for ARM.
Diffstat (limited to 'sys/boot/uboot')
-rw-r--r--sys/boot/uboot/common/Makefile.inc2
-rw-r--r--sys/boot/uboot/common/metadata.c457
2 files changed, 458 insertions, 1 deletions
diff --git a/sys/boot/uboot/common/Makefile.inc b/sys/boot/uboot/common/Makefile.inc
index 5d20372..e12804c 100644
--- a/sys/boot/uboot/common/Makefile.inc
+++ b/sys/boot/uboot/common/Makefile.inc
@@ -1,3 +1,3 @@
# $FreeBSD$
-SRCS+= main.c
+SRCS+= main.c metadata.c
diff --git a/sys/boot/uboot/common/metadata.c b/sys/boot/uboot/common/metadata.c
new file mode 100644
index 0000000..9c8ce94
--- /dev/null
+++ b/sys/boot/uboot/common/metadata.c
@@ -0,0 +1,457 @@
+/*-
+ * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
+ * Copyright (C) 2006 Semihalf, Piotr Kruszynski <ppk@semihalf.com>
+ * Copyright (C) 2007-2008 Semihalf, Rafal Jaworowski <raj@semihalf.com>
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stand.h>
+#include <sys/param.h>
+#include <sys/reboot.h>
+#include <sys/linker.h>
+
+#include <machine/elf.h>
+#include <machine/metadata.h>
+#include <machine/bootinfo.h>
+
+#include "api_public.h"
+#include "bootstrap.h"
+#include "glue.h"
+
+/*
+ * Return a 'boothowto' value corresponding to the kernel arguments in
+ * (kargs) and any relevant environment variables.
+ */
+static struct
+{
+ const char *ev;
+ int mask;
+} howto_names[] = {
+ {"boot_askname", RB_ASKNAME},
+ {"boot_cdrom", RB_CDROM},
+ {"boot_ddb", RB_KDB},
+ {"boot_dfltroot", RB_DFLTROOT},
+ {"boot_gdb", RB_GDB},
+ {"boot_multicons", RB_MULTIPLE},
+ {"boot_mute", RB_MUTE},
+ {"boot_pause", RB_PAUSE},
+ {"boot_serial", RB_SERIAL},
+ {"boot_single", RB_SINGLE},
+ {"boot_verbose", RB_VERBOSE},
+ {NULL, 0}
+};
+
+static 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.
+ */
+static 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
+ */
+#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, sizeof(u_long));\
+}
+
+#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), sizeof(u_long)); \
+}
+
+#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, sizeof(u_long)); \
+}
+
+#define MOD_END(a, c) { \
+ COPY32(MODINFO_END, a, c); \
+ COPY32(0, a, c); \
+}
+
+static vm_offset_t
+md_copymodules(vm_offset_t addr)
+{
+ struct preloaded_file *fp;
+ struct file_metadata *md;
+ 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 be first */
+ MOD_TYPE(addr, fp->f_type, c);
+ if (fp->f_args)
+ MOD_ARGS(addr, fp->f_args, c);
+ 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);
+}
+
+/*
+ * Prepare the bootinfo structure. Put a ptr to the allocated struct in addr,
+ * return size.
+ */
+static int
+md_bootinfo(struct bootinfo **addr)
+{
+#define TMP_MAX_ETH 8
+#define TMP_MAX_MR 8
+ struct bootinfo *bi;
+ struct bi_mem_region tmp_mr[TMP_MAX_MR];
+ struct bi_eth_addr tmp_eth[TMP_MAX_ETH];
+ struct sys_info *si;
+ char *str, *end;
+ const char *env;
+ void *ptr;
+ u_int8_t tmp_addr[6];
+ int i, n, mr_no, eth_no, size;
+
+ if ((si = ub_get_sys_info()) == NULL)
+ panic("can't retrieve U-Boot sysinfo");
+
+ /*
+ * Handle mem regions (we only care about DRAM)
+ */
+ for (i = 0, mr_no = 0; i < si->mr_no; i++) {
+ if (si->mr[i].flags == MR_ATTR_DRAM) {
+ if (mr_no >= TMP_MAX_MR) {
+ printf("too many memory regions: %d\n", mr_no);
+ break;
+ }
+ tmp_mr[mr_no].mem_base = si->mr[i].start;
+ tmp_mr[mr_no].mem_size = si->mr[i].size;
+ mr_no++;
+ continue;
+ }
+ }
+ if (mr_no == 0)
+ panic("can't retrieve RAM info");
+
+ size = (mr_no * sizeof(struct bi_mem_region) - sizeof(bi->bi_data));
+
+ /*
+ * Handle Ethernet addresses: parse u-boot env for eth%daddr
+ */
+ env = NULL;
+ eth_no = 0;
+ while ((env = ub_env_enum(env)) != NULL) {
+ if (strncmp(env, "eth", 3) == 0 &&
+ strncmp(env + (strlen(env) - 4), "addr", 4) == 0) {
+
+ /* Extract interface number */
+ i = strtol(env + 3, &end, 10);
+ if (end == (env + 3))
+ /* 'ethaddr' means interface 0 address */
+ n = 0;
+ else
+ n = i;
+
+ if (n >= TMP_MAX_MR) {
+ printf("Ethernet interface number too high: %d. "
+ "Skipping...\n");
+ continue;
+ }
+
+ str = ub_env_get(env);
+ for (i = 0; i < 6; i++) {
+ tmp_addr[i] = str ? strtol(str, &end, 16) : 0;
+ if (str)
+ str = (*end) ? end + 1 : end;
+
+ tmp_eth[n].mac_addr[i] = tmp_addr[i];
+ }
+
+ /* eth_no is 1-based number of all interfaces defined */
+ if (n + 1 > eth_no)
+ eth_no = n + 1;
+ }
+ }
+
+ size += (eth_no * sizeof(struct bi_eth_addr)) + sizeof(struct bootinfo);
+
+ /*
+ * Once its whole size is calculated, allocate space for the bootinfo
+ * and copy over the contents from temp containers.
+ */
+ if ((bi = malloc(size)) == NULL)
+ panic("can't allocate mem for bootinfo");
+
+ ptr = (struct bi_mem_region *)bi->bi_data;
+ bcopy(tmp_mr, ptr, mr_no * sizeof(struct bi_mem_region));
+ ptr += mr_no * sizeof(struct bi_mem_region);
+ bcopy(tmp_eth, ptr, eth_no * sizeof(struct bi_eth_addr));
+
+ bi->bi_mem_reg_no = mr_no;
+ bi->bi_eth_addr_no = eth_no;
+ bi->bi_version = BI_VERSION;
+ bi->bi_bar_base = si->bar;
+ bi->bi_cpu_clk = si->clk_cpu;
+ bi->bi_bus_clk = si->clk_bus;
+
+ *addr = bi;
+
+ return (size);
+}
+
+/*
+ * 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(char *args, vm_offset_t *modulep)
+{
+ struct preloaded_file *kfp;
+ struct preloaded_file *xp;
+ struct file_metadata *md;
+ struct bootinfo *bip;
+ vm_offset_t kernend;
+ vm_offset_t addr;
+ vm_offset_t envp;
+ vm_offset_t size;
+ vm_offset_t vaddr;
+ char *rootdevname;
+ int howto;
+ int bisize;
+ int i;
+
+ /*
+ * These metadata addreses must be converted for kernel after
+ * relocation.
+ */
+ uint32_t mdt[] = {
+ MODINFOMD_SSYM, MODINFOMD_ESYM, MODINFOMD_KERNEND, MODINFOMD_ENVP
+ };
+
+ 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);
+
+ /* prepare bootinfo */
+ bisize = md_bootinfo(&bip);
+
+ kernend = 0;
+ kfp = file_findfile(NULL, "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);
+ file_addmetadata(kfp, MODINFOMD_BOOTINFO, bisize, bip);
+ file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
+ file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
+
+ *modulep = addr;
+ size = md_copymodules(0);
+ kernend = roundup(addr + size, PAGE_SIZE);
+
+ md = file_findmetadata(kfp, MODINFOMD_KERNEND);
+ bcopy(&kernend, md->md_data, sizeof kernend);
+
+ /* Convert addresses to the final VA */
+ *modulep -= __elfN(relocation_offset);
+
+ for (i = 0; i < sizeof mdt / sizeof mdt[0]; i++) {
+ md = file_findmetadata(kfp, mdt[i]);
+ if (md) {
+ bcopy(md->md_data, &vaddr, sizeof vaddr);
+ vaddr -= __elfN(relocation_offset);
+ bcopy(&vaddr, md->md_data, sizeof vaddr);
+ }
+ }
+ (void)md_copymodules(addr);
+
+ return(0);
+}
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