[U-Boot-Users] [git patch] flat device tree
Kumar Gala
galak at gate.crashing.org
Tue Jan 24 00:45:42 CET 2006
Please pull from 'ft_infr' branch of
git.kernel.org:/pub/scm/boot/u-boot/u-boot.git
to receive the following updates:
CHANGELOG | 28 ++++++++++++++++++++++++++
README | 17 ++++++++++++++++
common/cmd_bootm.c | 16 +++++++++------
common/ft_build.c | 49 ++++++++++++++++++++++++++++++++++++-----------
cpu/mpc83xx/cpu.c | 38 ++++++++++++++++++++++++++++++++++++
include/configs/stxxtc.h | 2 +
include/ft_build.h | 4 ++-
7 files changed, 136 insertions(+), 18 deletions(-)
Kumar Gala:
Added CONFIG_ options for bd_t and env in flat dev tree
Allow board code to fixup the flat device tree before booting a
Added OF_STDOUT_PATH and OF_SOC
Add support for passing initrd information via flat device tree
Add helper function for generic flat device tree fixups for mpc83xx
diff --git a/CHANGELOG b/CHANGELOG
index c1da98f..1ad9bd3 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,34 @@
Changes since U-Boot 1.1.4:
======================================================================
+* Add helper function for generic flat device tree fixups for mpc83xx
+ Patch by Kumar Gala 11 Jan 2006
+
+* Add support for passing initrd information via flat device tree
+ Patch by Kumar Gala 11 Jan 2006
+
+* Added OF_STDOUT_PATH and OF_SOC
+
+ OF_STDOUT_PATH specifies the path to the device the kernel can use
+ for console output
+
+ OF_SOC specifies the proper name of the SOC node if one exists.
+ Patch by Kumar Gala 11 Jan 2006
+
+* Allow board code to fixup the flat device tree before booting a
+ kernel
+ Patch by Kumar Gala 11 Jan 2006
+
+* Added CONFIG_ options for bd_t and env in flat dev tree
+
+ CONFIG_OF_HAS_BD_T will put a copy of the bd_t
+ into the resulting flat device tree.
+
+ CONFIG_OF_HAS_UBOOT_ENV will copy the environment
+ variables from u-boot into the flat device tree
+
+ Patch by Kumar Gala 11 Jan 2006
+
* Add support for 28F256J3A flah (=> 64 MB) on PM520 board
* Fix compiler problem with at91rm9200dk board.
diff --git a/README b/README
index 6f61008..ecaef9e 100644
--- a/README
+++ b/README
@@ -411,7 +411,24 @@ The following options need to be configu
The maximum size of the constructed OF tree.
OF_CPU - The proper name of the cpus node.
+ OF_SOC - The proper name of the soc node.
OF_TBCLK - The timebase frequency.
+ OF_STDOUT_PATH - The path to the console device
+
+ 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_HAS_UBOOT_ENV
+
+ The resulting flat device tree will have a copy of u-boot's
+ environment variables
+
+ CONFIG_OF_BOARD_SETUP
+
+ Board code has addition modification that it wants to make
+ to the flat device tree before handing it off to the kernel
- Serial Ports:
CFG_PL010_SERIAL
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index 8599a49..9562dbe 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -819,7 +819,7 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int fl
(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
#else
- ft_setup(of_flat_tree, OF_FLAT_TREE_MAX_SIZE, kbd);
+ ft_setup(of_flat_tree, OF_FLAT_TREE_MAX_SIZE, kbd, initrd_start, initrd_end);
/* ft_dump_blob(of_flat_tree); */
#if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
@@ -828,12 +828,16 @@ do_bootm_linux (cmd_tbl_t *cmdtp, int fl
/*
* Linux Kernel Parameters:
* r3: ptr to OF flat tree, followed by the board info data
- * r4: initrd_start or 0 if no initrd
- * r5: initrd_end - unused if r4 is 0
- * r6: Start of command line string
- * r7: End of command line string
+ * r4: physical pointer to the kernel itself
+ * r5: NULL
+ * r6: NULL
+ * r7: NULL
*/
- (*kernel) ((bd_t *)of_flat_tree, initrd_start, initrd_end, cmd_start, cmd_end);
+ if (getenv("disable_of") != NULL)
+ (*kernel) ((bd_t *)of_flat_tree, initrd_start, initrd_end,
+ cmd_start, cmd_end);
+ else
+ (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
#endif
}
diff --git a/common/ft_build.c b/common/ft_build.c
index 65a274f..9e9c906 100644
--- a/common/ft_build.c
+++ b/common/ft_build.c
@@ -163,7 +163,7 @@ void ft_add_rsvmap(struct ft_cxt *cxt, u
((u64 *) cxt->pres)[0] = cpu_to_be64(physaddr); /* phys = 0, size = 0, terminate */
((u64 *) cxt->pres)[1] = cpu_to_be64(size);
- cxt->pres += 18; /* advance */
+ cxt->pres += 16; /* advance */
((u64 *) cxt->pres)[0] = 0; /* phys = 0, size = 0, terminate */
((u64 *) cxt->pres)[1] = 0;
@@ -529,6 +529,7 @@ extern uchar(*env_get_char) (int);
#define BDM(x) { .name = #x, .offset = offsetof(bd_t, bi_ ##x ) }
+#ifdef CONFIG_OF_HAS_BD_T
static const struct {
const char *name;
int offset;
@@ -574,19 +575,24 @@ static const struct {
#endif
BDM(baudrate),
};
+#endif
-void ft_setup(void *blob, int size, bd_t * bd)
+void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_end)
{
- DECLARE_GLOBAL_DATA_PTR;
- u8 *end;
u32 *p;
int len;
struct ft_cxt cxt;
- int i, k, nxt;
- static char tmpenv[256];
- char *s, *lval, *rval;
ulong clock;
- uint32_t v;
+#if defined(CONFIG_OF_HAS_UBOOT_ENV)
+ int k, nxt;
+#endif
+#if defined(CONFIG_OF_HAS_BD_T)
+ u8 *end;
+#endif
+#if defined(CONFIG_OF_HAS_UBOOT_ENV) || defined(CONFIG_OF_HAS_BD_T)
+ int i;
+ static char tmpenv[256];
+#endif
/* disable OF tree; booting old kernel */
if (getenv("disable_of") != NULL) {
@@ -596,7 +602,8 @@ void ft_setup(void *blob, int size, bd_t
ft_begin(&cxt, blob, size);
- /* fs_add_rsvmap not used */
+ if (initrd_start && initrd_end)
+ ft_add_rsvmap(&cxt, initrd_start, initrd_end - initrd_start + 1);
ft_begin_tree(&cxt);
@@ -610,9 +617,12 @@ void ft_setup(void *blob, int size, bd_t
/* back into root */
ft_backtrack_node(&cxt);
+#ifdef CONFIG_OF_HAS_UBOOT_ENV
ft_begin_node(&cxt, "u-boot-env");
for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
+ char *s, *lval, *rval;
+
for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) ;
s = tmpenv;
for (k = i; k < nxt && s < &tmpenv[sizeof(tmpenv) - 1]; ++k)
@@ -629,12 +639,20 @@ void ft_setup(void *blob, int size, bd_t
}
ft_end_node(&cxt);
+#endif
ft_begin_node(&cxt, "chosen");
ft_prop_str(&cxt, "name", "chosen");
ft_prop_str(&cxt, "bootargs", getenv("bootargs"));
ft_prop_int(&cxt, "linux,platform", 0x600); /* what is this? */
+ if (initrd_start && initrd_end) {
+ ft_prop_int(&cxt, "linux,initrd-start", initrd_start);
+ ft_prop_int(&cxt, "linux,initrd-end", initrd_end);
+ }
+#ifdef OF_STDOUT_PATH
+ ft_prop_str(&cxt, "linux,stdout-path", OF_STDOUT_PATH);
+#endif
ft_end_node(&cxt);
@@ -647,14 +665,19 @@ void ft_setup(void *blob, int size, bd_t
ft_dump_blob(blob);
*/
+#ifdef CONFIG_OF_HAS_BD_T
/* paste the bd_t at the end of the flat tree */
end = (char *)blob +
be32_to_cpu(((struct boot_param_header *)blob)->totalsize);
memcpy(end, bd, sizeof(*bd));
+#endif
#ifdef CONFIG_PPC
+#ifdef CONFIG_OF_HAS_BD_T
for (i = 0; i < sizeof(bd_map)/sizeof(bd_map[0]); i++) {
+ uint32_t v;
+
sprintf(tmpenv, "/bd_t/%s", bd_map[i].name);
v = *(uint32_t *)((char *)bd + bd_map[i].offset);
@@ -670,6 +693,7 @@ void ft_setup(void *blob, int size, bd_t
p = ft_get_prop(blob, "/bd_t/ethspeed", &len);
if (p != NULL)
*p = cpu_to_be32((uint32_t) bd->bi_ethspeed);
+#endif
clock = bd->bi_intfreq;
p = ft_get_prop(blob, "/cpus/" OF_CPU "/clock-frequency", &len);
@@ -680,11 +704,14 @@ void ft_setup(void *blob, int size, bd_t
clock = OF_TBCLK;
p = ft_get_prop(blob, "/cpus/" OF_CPU "/timebase-frequency", &len);
if (p != NULL)
- *p = cpu_to_be32(OF_TBCLK);
+ *p = cpu_to_be32(clock);
#endif
-
#endif /* __powerpc__ */
+#ifdef CONFIG_OF_BOARD_SETUP
+ ft_board_setup(blob, bd);
+#endif
+
/*
printf("final OF-tree\n");
ft_dump_blob(blob);
diff --git a/cpu/mpc83xx/cpu.c b/cpu/mpc83xx/cpu.c
index 8c9b515..e49e4fe 100644
--- a/cpu/mpc83xx/cpu.c
+++ b/cpu/mpc83xx/cpu.c
@@ -35,6 +35,7 @@
#include <watchdog.h>
#include <command.h>
#include <mpc83xx.h>
+#include <ft_build.h>
#include <asm/processor.h>
@@ -151,3 +152,40 @@ void watchdog_reset (void)
hang(); /* FIXME: implement watchdog_reset()? */
}
#endif /* CONFIG_WATCHDOG */
+
+#if defined(CONFIG_OF_FLAT_TREE)
+void
+ft_cpu_setup(void *blob, bd_t *bd)
+{
+ u32 *p;
+ int len;
+ ulong clock;
+
+ clock = bd->bi_busfreq;
+ p = ft_get_prop(blob, "/cpus/" OF_CPU "/bus-frequency", &len);
+ if (p != NULL)
+ *p = cpu_to_be32(clock);
+
+ p = ft_get_prop(blob, "/" OF_SOC "/bus-frequency", &len);
+ if (p != NULL)
+ *p = cpu_to_be32(clock);
+
+ p = ft_get_prop(blob, "/" OF_SOC "/serial at 4500/clock-frequency", &len);
+ if (p != NULL)
+ *p = cpu_to_be32(clock);
+
+ p = ft_get_prop(blob, "/" OF_SOC "/serial at 4600/clock-frequency", &len);
+ if (p != NULL)
+ *p = cpu_to_be32(clock);
+
+#ifdef CONFIG_MPC83XX_TSEC1
+ p = ft_get_prop(blob, "/" OF_SOC "/ethernet at 24000/address", &len);
+ memcpy(p, bd->bi_enetaddr, 6);
+#endif
+
+#ifdef CONFIG_MPC83XX_TSEC2
+ p = ft_get_prop(blob, "/" OF_SOC "/ethernet at 25000/address", &len);
+ memcpy(p, bd->bi_enet1addr, 6);
+#endif
+}
+#endif
diff --git a/include/configs/stxxtc.h b/include/configs/stxxtc.h
index 3ffe6b2..be6c36c 100644
--- a/include/configs/stxxtc.h
+++ b/include/configs/stxxtc.h
@@ -584,5 +584,7 @@ typedef unsigned int led_id_t;
#define OF_CPU "PowerPC,MPC870 at 0"
#define OF_TBCLK (MPC8XX_HZ / 16)
+#define CONFIG_OF_HAS_BD_T 1
+#define CONFIG_OF_HAS_UBOOT_ENV 1
#endif /* __CONFIG_H */
diff --git a/include/ft_build.h b/include/ft_build.h
index 9104b1a..47ca575 100644
--- a/include/ft_build.h
+++ b/include/ft_build.h
@@ -57,10 +57,12 @@ void ft_prop_int(struct ft_cxt *cxt, con
void ft_begin(struct ft_cxt *cxt, void *blob, int max_size);
void ft_add_rsvmap(struct ft_cxt *cxt, u64 physaddr, u64 size);
-void ft_setup(void *blob, int size, bd_t * bd);
+void ft_setup(void *blob, int size, bd_t * bd, ulong initrd_start, ulong initrd_end);
void ft_dump_blob(const void *bphp);
void ft_merge_blob(struct ft_cxt *cxt, void *blob);
void *ft_get_prop(void *bphp, const char *propname, int *szp);
+void ft_board_setup(void *blob, bd_t *bd);
+
#endif
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