diff options
author | Wolfgang Denk <wd@denx.de> | 2010-10-12 20:48:01 +0200 |
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committer | Wolfgang Denk <wd@denx.de> | 2010-10-12 20:48:01 +0200 |
commit | 655c54975296002587c705e05c23754edb121c2c (patch) | |
tree | ff970d8d467a7fddb8fa6217e1533a028cb4c036 /arch | |
parent | 0ee8746a93e29a3d884f19598409a3bea8ff51ab (diff) | |
parent | b98cba0911c7d0c0486d600c2aa646395adf32f4 (diff) |
Merge branch 'master' of git://git.denx.de/u-boot-microblaze
Diffstat (limited to 'arch')
-rw-r--r-- | arch/microblaze/cpu/start.S | 60 | ||||
-rw-r--r-- | arch/microblaze/include/asm/byteorder.h | 4 | ||||
-rw-r--r-- | arch/microblaze/lib/board.c | 12 |
3 files changed, 65 insertions, 11 deletions
diff --git a/arch/microblaze/cpu/start.S b/arch/microblaze/cpu/start.S index 2e9a08dc54..7f6043413e 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 a4a75b7a6d..b2757a41f8 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 3ff5c17d24..0ce040e9ef 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 */ |