Kernel/arm7 - Serial works (realview-pb-a8)

[tpg/acess2.git] / Kernel / arch / arm7 / start.s

diff --git a/Kernel/arch/arm7/start.s b/Kernel/arch/arm7/start.s
index fb28d33..abfbb59 100644 (file)
--- a/Kernel/arch/arm7/start.s
+++ b/Kernel/arch/arm7/start.s
@@ -3,7 +3,7 @@ KERNEL_BASE =   0x80000000
 .section .init
 interrupt_vector_table:
        b _start @ Reset
-       b .
+       b .     @ ?
        b SyscallHandler @ SWI instruction
        b . 
        b .
@@ -17,13 +17,16 @@ _start:
        mcr p15, 0, r0, c2, c0, 1       @ Set TTBR1 to r0
        mcr p15, 0, r0, c2, c0, 0       @ Set TTBR0 to r0 too (for identity)
 
-@      mov r0, #1
-@      mcr p15, 0, r0, c2, c0, 2       @ Set TTCR to 1 (50/50 split)
+       mov r0, #1
+       mcr p15, 0, r0, c2, c0, 2       @ Set TTCR to 1 (50/50 split)
+       
+       mov r0, #3
+       mcr p15, 0, r0, c3, c0, 0       @ Set Domain 0 to Manager
 
-@      mrc p15, 0, r0, c1, c0, 0
+       mrc p15, 0, r0, c1, c0, 0
        orr r0, r0, #1
-@      orr r0, r0, #1 << 23
-@      mcr p15, 0, r0, c1, c0, 0
+       orr r0, r0, #1 << 23
+       mcr p15, 0, r0, c1, c0, 0
 
        ldr sp, =stack+0x10000  @ Set up stack
        ldr r0, =kmain
@@ -41,10 +44,10 @@ SyscallHandler:
 
 kernel_table0:
        .long 0x00000002        @ Identity map the first 4 MiB
-       .rept 0x801
+       .rept 0x800 - 1
                .long 0
        .endr
-       .long 0x00000002        @ Identity map the first 4 MiB
+       .long 0x00000002        @ Map first 4 MiB to 2GiB
        .long 0x00100002        @ 
        .long 0x00200002        @ 
        .long 0x00300002        @ 
@@ -79,9 +82,10 @@ kernel_table1_map:
        .long kernel_table1_map - KERNEL_BASE + (1 << 4) + 3
        .long 0
 
+@ Hardware mappings 
 .globl hwmap_table_0
 hwmap_table_0:
-       .long 0x16000000 + (1 << 4) + 3 @ Serial Port
+       .long 0x10009000 + (1 << 4) + 3 @ UART0
        .rept 1024 - 1
                .long 0
        .endr