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authorWolfgang Denk <wd@denx.de>2010-10-12 20:48:01 +0200
committerWolfgang Denk <wd@denx.de>2010-10-12 20:48:01 +0200
commit655c54975296002587c705e05c23754edb121c2c (patch)
treeff970d8d467a7fddb8fa6217e1533a028cb4c036 /arch
parent0ee8746a93e29a3d884f19598409a3bea8ff51ab (diff)
parentb98cba0911c7d0c0486d600c2aa646395adf32f4 (diff)
downloadu-boot-linaro-stable-655c54975296002587c705e05c23754edb121c2c.tar.gz
Merge branch 'master' of git://git.denx.de/u-boot-microblaze
Diffstat (limited to 'arch')
-rw-r--r--arch/microblaze/cpu/start.S60
-rw-r--r--arch/microblaze/include/asm/byteorder.h4
-rw-r--r--arch/microblaze/lib/board.c12
3 files changed, 65 insertions, 11 deletions
diff --git a/arch/microblaze/cpu/start.S b/arch/microblaze/cpu/start.S
index 2e9a08dc5..7f6043413 100644
--- a/arch/microblaze/cpu/start.S
+++ b/arch/microblaze/cpu/start.S
@@ -32,6 +32,22 @@ _start:
mts rmsr, r0 /* disable cache */
addi r1, r0, CONFIG_SYS_INIT_SP_OFFSET
addi r1, r1, -4 /* Decrement SP to top of memory */
+
+ /* Find-out if u-boot is running on BIG/LITTLE endian platform
+ * There are some steps which is necessary to keep in mind:
+ * 1. Setup offset value to r6
+ * 2. Store word offset value to address 0x0
+ * 3. Load just byte from address 0x0
+ * 4a) LITTLE endian - r10 contains 0x2 because it is the smallest
+ * value that's why is on address 0x0
+ * 4b) BIG endian - r10 contains 0x0 because 0x2 offset is on addr 0x3
+ */
+ addik r6, r0, 0x2 /* BIG/LITTLE endian offset */
+ swi r6, r0, 0
+ lbui r10, r0, 0
+ swi r6, r0, 0x40
+ swi r10, r0, 0x50
+
/* add opcode instruction for 32bit jump - 2 instruction imm & brai*/
addi r6, r0, 0xb0000000 /* hex b000 opcode imm */
swi r6, r0, 0x0 /* reset address */
@@ -75,26 +91,52 @@ _start:
/* user_vector_exception */
addik r6, r0, _exception_handler
sw r6, r1, r0
- lhu r7, r1, r0
- shi r7, r0, 0xa
- shi r6, r0, 0xe
+ /*
+ * BIG ENDIAN memory map for user exception
+ * 0x8: 0xB000XXXX
+ * 0xC: 0xB808XXXX
+ *
+ * then it is necessary to count address for storing the most significant
+ * 16bits from _exception_handler address and copy it to
+ * 0xa address. Big endian use offset in r10=0 that's why is it just
+ * 0xa address. The same is done for the least significant 16 bits
+ * for 0xe address.
+ *
+ * LITTLE ENDIAN memory map for user exception
+ * 0x8: 0xXXXX00B0
+ * 0xC: 0xXXXX08B8
+ *
+ * Offset is for little endian setup to 0x2. rsubi instruction decrease
+ * address value to ensure that points to proper place which is
+ * 0x8 for the most significant 16 bits and
+ * 0xC for the least significant 16 bits
+ */
+ lhu r7, r1, r10
+ rsubi r8, r10, 0xa
+ sh r7, r0, r8
+ rsubi r8, r10, 0xe
+ sh r6, r0, r8
#endif
#ifdef CONFIG_SYS_INTC_0
/* interrupt_handler */
addik r6, r0, _interrupt_handler
sw r6, r1, r0
- lhu r7, r1, r0
- shi r7, r0, 0x12
- shi r6, r0, 0x16
+ lhu r7, r1, r10
+ rsubi r8, r10, 0x12
+ sh r7, r0, r8
+ rsubi r8, r10, 0x16
+ sh r6, r0, r8
#endif
/* hardware exception */
addik r6, r0, _hw_exception_handler
sw r6, r1, r0
- lhu r7, r1, r0
- shi r7, r0, 0x22
- shi r6, r0, 0x26
+ lhu r7, r1, r10
+ rsubi r8, r10, 0x22
+ sh r7, r0, r8
+ rsubi r8, r10, 0x26
+ sh r6, r0, r8
/* enable instruction and data cache */
mfs r12, rmsr
diff --git a/arch/microblaze/include/asm/byteorder.h b/arch/microblaze/include/asm/byteorder.h
index a4a75b7a6..b2757a41f 100644
--- a/arch/microblaze/include/asm/byteorder.h
+++ b/arch/microblaze/include/asm/byteorder.h
@@ -50,6 +50,10 @@ static __inline__ __u16 ___arch__swab16 (__u16 half_word)
#endif /* __GNUC__ */
+#ifdef __MICROBLAZEEL__
+#include <linux/byteorder/little_endian.h>
+#else
#include <linux/byteorder/big_endian.h>
+#endif
#endif /* __MICROBLAZE_BYTEORDER_H__ */
diff --git a/arch/microblaze/lib/board.c b/arch/microblaze/lib/board.c
index 3ff5c17d2..0ce040e9e 100644
--- a/arch/microblaze/lib/board.c
+++ b/arch/microblaze/lib/board.c
@@ -31,6 +31,7 @@
#include <version.h>
#include <watchdog.h>
#include <stdio_dev.h>
+#include <net.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -42,6 +43,7 @@ extern int gpio_init (void);
#ifdef CONFIG_SYS_INTC_0
extern int interrupts_init (void);
#endif
+
#if defined(CONFIG_CMD_NET)
extern int eth_init (bd_t * bis);
#endif
@@ -165,8 +167,14 @@ void board_init (void)
#if defined(CONFIG_CMD_NET)
/* IP Address */
- bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
- eth_init (bd);
+ bd->bi_ip_addr = getenv_IPaddr("ipaddr");
+
+ printf("Net: ");
+ eth_initialize(gd->bd);
+
+ uchar enetaddr[6];
+ eth_getenv_enetaddr("ethaddr", enetaddr);
+ printf("MAC: %pM\n", enetaddr);
#endif
/* main_loop */