| 1 | #
|
|---|
| 2 | # Copyright (c) 2006 Martin Decky
|
|---|
| 3 | # All rights reserved.
|
|---|
| 4 | #
|
|---|
| 5 | # Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | # modification, are permitted provided that the following conditions
|
|---|
| 7 | # are met:
|
|---|
| 8 | #
|
|---|
| 9 | # - Redistributions of source code must retain the above copyright
|
|---|
| 10 | # notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | # - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | # notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | # documentation and/or other materials provided with the distribution.
|
|---|
| 14 | # - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | # derived from this software without specific prior written permission.
|
|---|
| 16 | #
|
|---|
| 17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | #
|
|---|
| 28 |
|
|---|
| 29 | #include <abi/asmtool.h>
|
|---|
| 30 | #include <arch/arch.h>
|
|---|
| 31 | #include <arch/regname.h>
|
|---|
| 32 |
|
|---|
| 33 | .set noat
|
|---|
| 34 | .set noreorder
|
|---|
| 35 |
|
|---|
| 36 | .section BOOTSTRAP
|
|---|
| 37 |
|
|---|
| 38 | /*
|
|---|
| 39 | * Registers on entry:
|
|---|
| 40 | *
|
|---|
| 41 | * a0: kernel argument count (kargc)
|
|---|
| 42 | * a1: kernel argument vector (kargv) of kargc elements
|
|---|
| 43 | * a2: unused here (kenvp on Malta)
|
|---|
| 44 | * a3: RAM size on Malta
|
|---|
| 45 | *
|
|---|
| 46 | * This is the case on Malta.
|
|---|
| 47 | * msim clears these registers, so it is de facto correct as well.
|
|---|
| 48 | */
|
|---|
| 49 | SYMBOL(start)
|
|---|
| 50 | /*
|
|---|
| 51 | * Setup the CP0 configuration
|
|---|
| 52 | * - Disable 64-bit kernel addressing mode
|
|---|
| 53 | * - Disable 64-bit supervisor adressing mode
|
|---|
| 54 | * - Disable 64-bit user addressing mode
|
|---|
| 55 | */
|
|---|
| 56 | mfc0 $t0, $status
|
|---|
| 57 | la $t1, 0xffffff1f
|
|---|
| 58 | and $t0, $t1, $t0
|
|---|
| 59 | mtc0 $t0, $status
|
|---|
| 60 |
|
|---|
| 61 | #if defined(MACHINE_lmalta) || defined(MACHINE_bmalta)
|
|---|
| 62 | /*
|
|---|
| 63 | * Remember the size of the SDRAM in bootinfo.
|
|---|
| 64 | */
|
|---|
| 65 | la $t0, PA2KA(BOOTINFO_OFFSET)
|
|---|
| 66 | sw $a3, 0($t0)
|
|---|
| 67 | #endif
|
|---|
| 68 |
|
|---|
| 69 | /*
|
|---|
| 70 | * Setup CPU map (on msim this code
|
|---|
| 71 | * is executed in parallel on all CPUs,
|
|---|
| 72 | * but it not an issue).
|
|---|
| 73 | */
|
|---|
| 74 | la $t0, PA2KA(CPUMAP_OFFSET)
|
|---|
| 75 |
|
|---|
| 76 | sw $zero, 0($t0)
|
|---|
| 77 | sw $zero, 4($t0)
|
|---|
| 78 | sw $zero, 8($t0)
|
|---|
| 79 | sw $zero, 12($t0)
|
|---|
| 80 |
|
|---|
| 81 | sw $zero, 16($t0)
|
|---|
| 82 | sw $zero, 20($t0)
|
|---|
| 83 | sw $zero, 24($t0)
|
|---|
| 84 | sw $zero, 28($t0)
|
|---|
| 85 |
|
|---|
| 86 | sw $zero, 32($t0)
|
|---|
| 87 | sw $zero, 36($t0)
|
|---|
| 88 | sw $zero, 40($t0)
|
|---|
| 89 | sw $zero, 44($t0)
|
|---|
| 90 |
|
|---|
| 91 | sw $zero, 48($t0)
|
|---|
| 92 | sw $zero, 52($t0)
|
|---|
| 93 | sw $zero, 56($t0)
|
|---|
| 94 | sw $zero, 60($t0)
|
|---|
| 95 |
|
|---|
| 96 | sw $zero, 64($t0)
|
|---|
| 97 | sw $zero, 68($t0)
|
|---|
| 98 | sw $zero, 72($t0)
|
|---|
| 99 | sw $zero, 76($t0)
|
|---|
| 100 |
|
|---|
| 101 | sw $zero, 80($t0)
|
|---|
| 102 | sw $zero, 84($t0)
|
|---|
| 103 | sw $zero, 88($t0)
|
|---|
| 104 | sw $zero, 92($t0)
|
|---|
| 105 |
|
|---|
| 106 | sw $zero, 96($t0)
|
|---|
| 107 | sw $zero, 100($t0)
|
|---|
| 108 | sw $zero, 104($t0)
|
|---|
| 109 | sw $zero, 108($t0)
|
|---|
| 110 |
|
|---|
| 111 | sw $zero, 112($t0)
|
|---|
| 112 | sw $zero, 116($t0)
|
|---|
| 113 | sw $zero, 120($t0)
|
|---|
| 114 | sw $zero, 124($t0)
|
|---|
| 115 |
|
|---|
| 116 | lui $t1, 1
|
|---|
| 117 |
|
|---|
| 118 | #ifdef MACHINE_msim
|
|---|
| 119 |
|
|---|
| 120 | /* Read dorder value */
|
|---|
| 121 | la $k0, MSIM_DORDER_ADDRESS
|
|---|
| 122 | lw $k1, ($k0)
|
|---|
| 123 |
|
|---|
| 124 | /*
|
|---|
| 125 | * If we are not running on BSP
|
|---|
| 126 | * then end in an infinite loop.
|
|---|
| 127 | */
|
|---|
| 128 | beq $k1, $zero, bsp
|
|---|
| 129 | nop
|
|---|
| 130 |
|
|---|
| 131 | /* Record CPU presence */
|
|---|
| 132 | sll $t2, $k1, 2
|
|---|
| 133 | addu $t2, $t2, $t0
|
|---|
| 134 | sw $t1, ($t2)
|
|---|
| 135 |
|
|---|
| 136 | loop:
|
|---|
| 137 | j loop
|
|---|
| 138 | nop
|
|---|
| 139 |
|
|---|
| 140 | #endif
|
|---|
| 141 |
|
|---|
| 142 | bsp:
|
|---|
| 143 | /* Record CPU presence */
|
|---|
| 144 | sw $t1, ($t0)
|
|---|
| 145 |
|
|---|
| 146 | /* Setup initial stack */
|
|---|
| 147 | la $sp, PA2KA(STACK_OFFSET)
|
|---|
| 148 |
|
|---|
| 149 | /* a0=kargc, a1=kargv */
|
|---|
| 150 | j bootstrap
|
|---|
| 151 | nop
|
|---|
| 152 |
|
|---|
| 153 | .text
|
|---|
| 154 |
|
|---|
| 155 | FUNCTION_BEGIN(halt)
|
|---|
| 156 | j halt
|
|---|
| 157 | nop
|
|---|
| 158 | FUNCTION_END(halt)
|
|---|
| 159 |
|
|---|
| 160 | FUNCTION_BEGIN(jump_to_kernel)
|
|---|
| 161 | j $a0
|
|---|
| 162 | nop
|
|---|
| 163 | FUNCTION_END(jump_to_kernel)
|
|---|
