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-rw-r--r--arch/microblaze/cpu/start.S69
-rw-r--r--include/configs/microblaze-generic.h9
2 files changed, 40 insertions, 38 deletions
diff --git a/arch/microblaze/cpu/start.S b/arch/microblaze/cpu/start.S
index 93a9efd..9077f74 100644
--- a/arch/microblaze/cpu/start.S
+++ b/arch/microblaze/cpu/start.S
@@ -30,6 +30,13 @@
.text
.global _start
_start:
+ /*
+ * reserve registers:
+ * r10: Stores little/big endian offset for vectors
+ * r2: Stores imm opcode
+ * r3: Stores brai opcode
+ */
+
mts rmsr, r0 /* disable cache */
addi r1, r0, CONFIG_SYS_INIT_SP_OFFSET
addi r1, r1, -4 /* Decrement SP to top of memory */
@@ -44,52 +51,34 @@ _start:
* 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 */
- swi r6, r0, 0x8 /* user vector exception */
- swi r6, r0, 0x10 /* interrupt */
- swi r6, r0, 0x20 /* hardware exception */
-
- addi r6, r0, 0xb8080000 /* hew b808 opcode brai*/
- swi r6, r0, 0x4 /* reset address */
- swi r6, r0, 0xC /* user vector exception */
- swi r6, r0, 0x14 /* interrupt */
- swi r6, r0, 0x24 /* hardware exception */
+ lwi r7, r0, 0x28
+ swi r6, r0, 0x28 /* used first unused MB vector */
+ lbui r10, r0, 0x28 /* used first unused MB vector */
+ swi r7, r0, 0x28
+
+ /* add opcode instruction for 32bit jump - 2 instruction imm & brai */
+ addi r2, r0, 0xb0000000 /* hex b000 opcode imm */
+ addi r3, r0, 0xb8080000 /* hew b808 opcode brai */
#ifdef CONFIG_SYS_RESET_ADDRESS
/* reset address */
+ swi r2, r0, 0x0 /* reset address - imm opcode */
+ swi r3, r0, 0x4 /* reset address - brai opcode */
+
addik r6, r0, CONFIG_SYS_RESET_ADDRESS
sw r6, r1, r0
- lhu r7, r1, r0
- shi r7, r0, 0x2
- shi r6, r0, 0x6
-/*
- * Copy U-Boot code to CONFIG_SYS_TEXT_BASE
- * solve problem with sbrk_base
- */
-#if (CONFIG_SYS_RESET_ADDRESS != CONFIG_SYS_TEXT_BASE)
- addi r4, r0, __end
- addi r5, r0, __text_start
- rsub r4, r5, r4 /* size = __end - __text_start */
- addi r6, r0, CONFIG_SYS_RESET_ADDRESS /* source address */
- addi r7, r0, 0 /* counter */
-4:
- lw r8, r6, r7
- sw r8, r5, r7
- addi r7, r7, 0x4
- cmp r8, r4, r7
- blti r8, 4b
-#endif
+ lhu r7, r1, r10
+ rsubi r8, r10, 0x2
+ sh r7, r0, r8
+ rsubi r8, r10, 0x6
+ sh r6, r0, r8
#endif
#ifdef CONFIG_SYS_USR_EXCEP
/* user_vector_exception */
+ swi r2, r0, 0x8 /* user vector exception - imm opcode */
+ swi r3, r0, 0xC /* user vector exception - brai opcode */
+
addik r6, r0, _exception_handler
sw r6, r1, r0
/*
@@ -121,6 +110,9 @@ _start:
#ifdef CONFIG_SYS_INTC_0
/* interrupt_handler */
+ swi r2, r0, 0x10 /* interrupt - imm opcode */
+ swi r3, r0, 0x14 /* interrupt - brai opcode */
+
addik r6, r0, _interrupt_handler
sw r6, r1, r0
lhu r7, r1, r10
@@ -131,6 +123,9 @@ _start:
#endif
/* hardware exception */
+ swi r2, r0, 0x20 /* hardware exception - imm opcode */
+ swi r3, r0, 0x24 /* hardware exception - brai opcode */
+
addik r6, r0, _hw_exception_handler
sw r6, r1, r0
lhu r7, r1, r10
diff --git a/include/configs/microblaze-generic.h b/include/configs/microblaze-generic.h
index 090ab3b..a811b76 100644
--- a/include/configs/microblaze-generic.h
+++ b/include/configs/microblaze-generic.h
@@ -44,7 +44,7 @@
# define CONFIG_SYS_NS16550_REG_SIZE -4
# define CONFIG_CONS_INDEX 1
# define CONFIG_SYS_NS16550_COM1 \
- (XILINX_UART16550_BASEADDR + 0x1000 + 0x3)
+ (XILINX_UART16550_BASEADDR + 0x1000)
# define CONFIG_SYS_NS16550_CLK XILINX_UART16550_CLOCK_HZ
# define CONFIG_BAUDRATE 115200
@@ -60,6 +60,7 @@
/*#define CONFIG_SYS_RESET_ADDRESS CONFIG_SYS_TEXT_BASE*/
/* ethernet */
+#undef CONFIG_SYS_ENET
#ifdef XILINX_EMACLITE_BASEADDR
# define CONFIG_XILINX_EMACLITE 1
# define CONFIG_SYS_ENET
@@ -243,6 +244,7 @@
#ifndef CONFIG_SYS_ENET
# undef CONFIG_CMD_NET
# undef CONFIG_NET_MULTI
+# undef CONFIG_CMD_NFS
#else
# define CONFIG_CMD_PING
# define CONFIG_CMD_DHCP
@@ -325,4 +327,9 @@
# define CONFIG_SYS_PROMPT_HUSH_PS2 "> "
#endif
+/* Enable flat device tree support */
+#define CONFIG_LMB 1
+#define CONFIG_FIT 1
+#define CONFIG_OF_LIBFDT 1
+
#endif /* __CONFIG_H */