[U-Boot-Users] [PATCH 6/6] Add a flattened device tree (fdt) command (2 of 2)
Jerry Van Baren
gvb.uboot at gmail.com
Sat Mar 31 19:53:53 CEST 2007
Modifications to the existing code to support the new fdt command.
Signed-off-by: Gerald Van Baren <vanbaren at cideas.com>
---
README | 33 ++++++++++---
board/mpc8360emds/config.mk | 6 ++
board/mpc8360emds/mpc8360emds.c | 30 +++++++++--
board/mpc8360emds/pci.c | 20 ++++++++
common/Makefile | 2 +-
common/cmd_bootm.c | 65 +++++++++++++++++++++----
cpu/mpc83xx/cpu.c | 102 ++++++++++++++++++++++++++++++++++++++-
include/configs/MPC8360EMDS.h | 6 ++-
8 files changed, 237 insertions(+), 27 deletions(-)
diff --git a/README b/README
index 1542864..87d6d10 100644
--- a/README
+++ b/README
@@ -164,6 +164,7 @@ Directory Hierarchy:
- lib_mips Files generic to MIPS architecture
- lib_nios Files generic to NIOS architecture
- lib_ppc Files generic to PowerPC architecture
+- libfdt Library files to support flattened device trees
- net Networking code
- post Power On Self Test
- rtc Real Time Clock drivers
@@ -430,12 +431,23 @@ The following options need to be configured:
expect it to be in bytes, others in MB.
Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes.
- CONFIG_OF_FLAT_TREE
+ CONFIG_OF_LIBFDT / CONFIG_OF_FLAT_TREE
New kernel versions are expecting firmware settings to be
- passed using flat open firmware trees.
- The environment variable "disable_of", when set, disables this
- functionality.
+ passed using flattened device trees (based on open firmware
+ concepts).
+
+ CONFIG_OF_LIBFDT
+ * New libfdt-based support
+ * Adds the "fdt" command
+ * The bootm command does _not_ modify the fdt
+
+ CONFIG_OF_FLAT_TREE
+ * Deprecated, see CONFIG_OF_LIBFDT
+ * Original ft_build.c-based support
+ * Automatically modifies the dft as part of the bootm command
+ * The environment variable "disable_of", when set,
+ disables this functionality.
CONFIG_OF_FLAT_TREE_MAX_SIZE
@@ -448,13 +460,16 @@ The following options need to be configured:
CONFIG_OF_HAS_BD_T
- The resulting flat device tree will have a copy of the bd_t.
- Space should be pre-allocated in the dts for the bd_t.
+ * CONFIG_OF_LIBFDT - enables the "fdt bd_t" command
+ * CONFIG_OF_FLAT_TREE - The resulting flat device tree
+ will have a copy of the bd_t. Space should be
+ pre-allocated in the dts for the bd_t.
CONFIG_OF_HAS_UBOOT_ENV
- The resulting flat device tree will have a copy of u-boot's
- environment variables
+ * CONFIG_OF_LIBFDT - enables the "fdt bd_t" command
+ * CONFIG_OF_FLAT_TREE - The resulting flat device tree
+ will have a copy of u-boot's environment variables
CONFIG_OF_BOARD_SETUP
@@ -721,6 +736,8 @@ The following options need to be configured:
#define CONFIG_COMMANDS (CFG_CMD_ALL & ~CFG_CMD_NET)
+ Other Commands:
+ fdt (flattened device tree) command: CONFIG_OF_LIBFDT
Note: Don't enable the "icache" and "dcache" commands
(configuration option CFG_CMD_CACHE) unless you know
diff --git a/board/mpc8360emds/config.mk b/board/mpc8360emds/config.mk
index 9ace886..d2a9435 100644
--- a/board/mpc8360emds/config.mk
+++ b/board/mpc8360emds/config.mk
@@ -26,3 +26,9 @@
#
TEXT_BASE = 0xFE000000
+
+#
+# Additional board-specific libraries
+#
+BOARDLIBS = libfdt/libfdt.a
+
diff --git a/board/mpc8360emds/mpc8360emds.c b/board/mpc8360emds/mpc8360emds.c
index 535884c..deadb5f 100644
--- a/board/mpc8360emds/mpc8360emds.c
+++ b/board/mpc8360emds/mpc8360emds.c
@@ -31,6 +31,10 @@
#if defined(CONFIG_OF_FLAT_TREE)
#include <ft_build.h>
#endif
+#if defined(CONFIG_OF_LIBFDT)
+#include <libfdt.h>
+#include <libfdt_env.h>
+#endif
const qe_iop_conf_t qe_iop_conf_tab[] = {
/* GETH1 */
@@ -658,22 +662,36 @@ U_BOOT_CMD(ecc, 4, 0, do_ecc,
" - disables injects\n" " - re-inits memory");
#endif /* if defined(CONFIG_DDR_ECC) && defined(CONFIG_DDR_ECC_CMD) */
-#if defined(CONFIG_OF_FLAT_TREE) && defined(CONFIG_OF_BOARD_SETUP)
+#if (defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)) \
+ && defined(CONFIG_OF_BOARD_SETUP)
void
ft_board_setup(void *blob, bd_t *bd)
{
+#if defined(CONFIG_OF_LIBFDT)
+ int nodeoffset;
+ int err;
+ int tmp[2];
+
+ nodeoffset = fdt_path_offset (fdt, "/memory");
+ if (nodeoffset >= 0) {
+ tmp[0] = cpu_to_be32(bd->bi_memstart);
+ tmp[1] = cpu_to_be32(bd->bi_memsize);
+ err = fdt_setprop(fdt, nodeoffset, "reg", tmp, sizeof(tmp));
+ }
+#else
u32 *p;
int len;
-#ifdef CONFIG_PCI
- ft_pci_setup(blob, bd);
-#endif
- ft_cpu_setup(blob, bd);
-
p = ft_get_prop(blob, "/memory/reg", &len);
if (p != NULL) {
*p++ = cpu_to_be32(bd->bi_memstart);
*p = cpu_to_be32(bd->bi_memsize);
}
+#endif
+
+#ifdef CONFIG_PCI
+ ft_pci_setup(blob, bd);
+#endif
+ ft_cpu_setup(blob, bd);
}
#endif
diff --git a/board/mpc8360emds/pci.c b/board/mpc8360emds/pci.c
index 67cd709..158effe 100644
--- a/board/mpc8360emds/pci.c
+++ b/board/mpc8360emds/pci.c
@@ -21,6 +21,10 @@
#if defined(CONFIG_OF_FLAT_TREE)
#include <ft_build.h>
#endif
+#if defined(CONFIG_OF_LIBFDT)
+#include <libfdt.h>
+#include <libfdt_env.h>
+#endif
#include <asm/fsl_i2c.h>
@@ -299,6 +303,22 @@ void pci_init_board(void)
}
#endif /* CONFIG_PCISLAVE */
+#if defined(CONFIG_OF_LIBFDT)
+void
+ft_pci_setup(void *blob, bd_t *bd)
+{
+ int nodeoffset;
+ int err;
+ int tmp[2];
+
+ nodeoffset = fdt_path_offset (fdt, "/" OF_SOC "/pci at 8500");
+ if (nodeoffset >= 0) {
+ tmp[0] = cpu_to_be32(hose[0].first_busno);
+ tmp[1] = cpu_to_be32(hose[0].last_busno);
+ err = fdt_setprop(fdt, nodeoffset, "bus-range", tmp, sizeof(tmp));
+ }
+}
+#endif /* CONFIG_OF_LIBFDT */
#ifdef CONFIG_OF_FLAT_TREE
void
ft_pci_setup(void *blob, bd_t *bd)
diff --git a/common/Makefile b/common/Makefile
index 6f81c4a..74a6af2 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -32,7 +32,7 @@ COBJS = main.o ACEX1K.o altera.o bedbug.o circbuf.o cmd_autoscript.o \
cmd_cache.o cmd_console.o \
cmd_date.o cmd_dcr.o cmd_diag.o cmd_display.o cmd_doc.o cmd_dtt.o \
cmd_eeprom.o cmd_elf.o cmd_ext2.o \
- cmd_fat.o cmd_fdc.o cmd_fdos.o cmd_flash.o cmd_fpga.o \
+ cmd_fat.o cmd_fdc.o cmd_fdt.o cmd_fdos.o cmd_flash.o cmd_fpga.o \
cmd_i2c.o cmd_ide.o cmd_immap.o cmd_itest.o cmd_jffs2.o \
cmd_load.o cmd_log.o \
cmd_mem.o cmd_mii.o cmd_misc.o cmd_mmc.o \
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index c0ed076..ab8648f 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -34,7 +34,11 @@
#include <environment.h>
#include <asm/byteorder.h>
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_LIBFDT)
+#include <fdt.h>
+#include <libfdt.h>
+#endif
+#if defined(CONFIG_OF_FLAT_TREE)
#include <ft_build.h>
#endif
@@ -467,7 +471,7 @@ U_BOOT_CMD(
"[addr [arg ...]]\n - boot application image stored in memory\n"
"\tpassing arguments 'arg ...'; when booting a Linux kernel,\n"
"\t'arg' can be the address of an initrd image\n"
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
"\tWhen booting a Linux kernel which requires a flat device-tree\n"
"\ta third argument is required which is the address of the of the\n"
"\tdevice-tree blob. To boot that kernel without an initrd image,\n"
@@ -529,7 +533,7 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
bd_t *kbd;
void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
image_header_t *hdr = &header;
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
char *of_flat_tree = NULL;
ulong of_data = 0;
#endif
@@ -622,7 +626,7 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
* Check if there is an initrd image
*/
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
/* Look for a '-' which indicates to ignore the ramdisk argument */
if (argc >= 3 && strcmp(argv[2], "-") == 0) {
debug ("Skipping initrd\n");
@@ -739,12 +743,15 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
len = data = 0;
}
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
if(argc > 3) {
of_flat_tree = (char *) simple_strtoul(argv[3], NULL, 16);
hdr = (image_header_t *)of_flat_tree;
-
- if (*(ulong *)of_flat_tree == OF_DT_HEADER) {
+#if defined(CONFIG_OF_LIBFDT)
+ if (be32_to_cpu(fdt_magic(of_flat_tree)) == FDT_MAGIC) {
+#else
+ if (*(ulong *)of_flat_tree == OF_DT_HEADER) {
+#endif
#ifndef CFG_NO_FLASH
if (addr2info((ulong)of_flat_tree) != NULL)
of_data = (ulong)of_flat_tree;
@@ -787,7 +794,11 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
printf("ERROR: uImage is not uncompressed\n");
return;
}
+#if defined(CONFIG_OF_LIBFDT)
+ if (be32_to_cpu(fdt_magic(of_flat_tree + sizeof(image_header_t))) != FDT_MAGIC) {
+#else
if (*((ulong *)(of_flat_tree + sizeof(image_header_t))) != OF_DT_HEADER) {
+#endif
printf ("ERROR: uImage data is not a flat device tree\n");
return;
}
@@ -824,12 +835,20 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
of_data += 4 - tail;
}
+#if defined(CONFIG_OF_LIBFDT)
+ if (be32_to_cpu(fdt_magic(of_data)) != FDT_MAGIC) {
+#else
if (((struct boot_param_header *)of_data)->magic != OF_DT_HEADER) {
+#endif
printf ("ERROR: image is not a flat device tree\n");
return;
}
+#if defined(CONFIG_OF_LIBFDT)
+ if (be32_to_cpu(fdt_totalsize(of_data)) != ntohl(len_ptr[2])) {
+#else
if (((struct boot_param_header *)of_data)->totalsize != ntohl(len_ptr[2])) {
+#endif
printf ("ERROR: flat device tree size does not agree with image\n");
return;
}
@@ -913,7 +932,31 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
unlock_ram_in_cache();
#endif
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_LIBFDT)
+ /* move of_flat_tree if needed */
+ if (of_data) {
+ int err;
+ ulong of_start, of_len;
+ of_len = be32_to_cpu(fdt_totalsize(of_data));
+ /* provide extra 8k pad */
+ if (initrd_start)
+ of_start = initrd_start - of_len - 8192;
+ else
+ of_start = (ulong)kbd - of_len - 8192;
+ of_start &= ~(4096 - 1); /* align on page */
+ debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
+ of_data, of_data + of_len - 1, of_len, of_len);
+
+
+ printf (" Loading Device Tree to %08lx, end %08lx ... ",
+ of_start, of_start + of_len - 1);
+ err = fdt_open_into(of_start, of_data, of_len);
+ if (err != 0) {
+ printf ("libfdt: %s\n", fdt_strerror(err));
+ }
+ }
+#endif
+#if defined(CONFIG_OF_FLAT_TREE)
/* move of_flat_tree if needed */
if (of_data) {
ulong of_start, of_len;
@@ -942,13 +985,13 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
* r6: Start of command line string
* r7: End of command line string
*/
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
if (!of_flat_tree) /* no device tree; boot old style */
#endif
(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
/* does not return */
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
/*
* Linux Kernel Parameters (passing device tree):
* r3: ptr to OF flat tree, followed by the board info data
@@ -957,8 +1000,10 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
* r6: NULL
* r7: NULL
*/
+#if defined(CONFIG_OF_FLAT_TREE)
ft_setup(of_flat_tree, kbd, initrd_start, initrd_end);
/* ft_dump_blob(of_flat_tree); */
+#endif
(*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
#endif
diff --git a/cpu/mpc83xx/cpu.c b/cpu/mpc83xx/cpu.c
index e4bc405..851241a 100644
--- a/cpu/mpc83xx/cpu.c
+++ b/cpu/mpc83xx/cpu.c
@@ -30,8 +30,14 @@
#include <watchdog.h>
#include <command.h>
#include <mpc83xx.h>
-#include <ft_build.h>
#include <asm/processor.h>
+#if defined(CONFIG_OF_FLAT_TREE)
+#include <ft_build.h>
+#endif
+#if defined(CONFIG_OF_LIBFDT)
+#include <libfdt.h>
+#include <libfdt_env.h>
+#endif
DECLARE_GLOBAL_DATA_PTR;
@@ -291,6 +297,100 @@ void watchdog_reset (void)
}
#endif
+#if defined(CONFIG_OF_LIBFDT)
+
+/*
+ * Fixups to the fdt. If "create" is TRUE, the node is created
+ * unconditionally. If "create" is FALSE, the node is updated
+ * only if it already exists.
+ */
+#define FT_UPDATE 0x00000000 /* update existing property only */
+#define FT_CREATE 0x00000001 /* create property if it doesn't exist */
+#define FT_BUSFREQ 0x00000002 /* source is bd->bi_busfreq */
+#define FT_ENETADDR 0x00000004 /* source is bd->bi_enetaddr */
+static const struct {
+ int createflags;
+ char *node;
+ char *prop;
+} fixup_props[] = {
+ { FT_CREATE | FT_BUSFREQ,
+ "/cpus/" OF_CPU,
+ "bus-frequency",
+ },
+ { FT_CREATE | FT_BUSFREQ,
+ "/cpus/" OF_SOC,
+ "bus-frequency"
+ },
+ { FT_CREATE | FT_BUSFREQ,
+ "/" OF_SOC "/serial at 4500/",
+ "clock-frequency"
+ },
+ { FT_CREATE | FT_BUSFREQ,
+ "/" OF_SOC "/serial at 4600/",
+ "clock-frequency"
+ },
+#ifdef CONFIG_MPC83XX_TSEC1
+ { FT_UPDATE | FT_ENETADDR,
+ "/" OF_SOC "/ethernet at 24000,
+ "mac-address",
+ },
+ { FT_UPDATE | FT_ENETADDR,
+ "/" OF_SOC "/ethernet at 24000,
+ "local-mac-address",
+ },
+#endif
+#ifdef CONFIG_MPC83XX_TSEC2
+ { FT_UPDATE | FT_ENETADDR,
+ "/" OF_SOC "/ethernet at 25000,
+ "mac-address",
+ },
+ { FT_UPDATE | FT_ENETADDR,
+ "/" OF_SOC "/ethernet at 25000,
+ "local-mac-address",
+ },
+#endif
+};
+
+void
+ft_cpu_setup(void *blob, bd_t *bd)
+{
+ int nodeoffset;
+ int err;
+ int j;
+
+ for (j = 0; j < (sizeof(fixup_props) / sizeof(fixup_props[0])); j++) {
+ nodeoffset = fdt_path_offset (fdt, fixup_props[j].node);
+ if (nodeoffset >= 0) {
+ /*
+ * If unconditional create or the property already exists...
+ */
+ if ((fixup_props[j].createflags & FT_CREATE) ||
+ (fdt_get_property(fdt, nodeoffset, fixup_props[j].prop, 0))) {
+ if (fixup_props[j].createflags & FT_BUSFREQ) {
+ u32 tmp;
+
+ tmp = cpu_to_be32(bd->bi_busfreq);
+ err = fdt_setprop(fdt, nodeoffset,
+ fixup_props[j].prop, &tmp, sizeof(tmp));
+ } else if (fixup_props[j].createflags & FT_ENETADDR) {
+ err = fdt_setprop(fdt, nodeoffset,
+ fixup_props[j].prop, bd->bi_enetaddr, 6);
+ } else {
+ printf("ft_cpu_setup: %s %s has no flag for the value to set\n",
+ fixup_props[j].node,
+ fixup_props[j].prop);
+ }
+ if (err < 0)
+ printf("libfdt: %s %s returned %s\n",
+ fixup_props[j].node,
+ fixup_props[j].prop,
+ fdt_strerror(err));
+ }
+ }
+ }
+}
+#endif
+
#if defined(CONFIG_OF_FLAT_TREE)
void
ft_cpu_setup(void *blob, bd_t *bd)
diff --git a/include/configs/MPC8360EMDS.h b/include/configs/MPC8360EMDS.h
index d2af0e1..79937dc 100644
--- a/include/configs/MPC8360EMDS.h
+++ b/include/configs/MPC8360EMDS.h
@@ -342,8 +342,12 @@
#endif
/* pass open firmware flat tree */
-#define CONFIG_OF_FLAT_TREE 1
+#define CONFIG_OF_LIBFDT 1
+#undef CONFIG_OF_FLAT_TREE
#define CONFIG_OF_BOARD_SETUP 1
+#define CONFIG_OF_HAS_BD_T 1
+#define CONFIG_OF_HAS_UBOOT_ENV 1
+
/* maximum size of the flat tree (8K) */
#define OF_FLAT_TREE_MAX_SIZE 8192
--
1.4.4.4
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