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/*
ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio.
This file is part of ChibiOS.
ChibiOS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file SPC560Dxx/boot.s
* @brief SPC560Dxx boot-related code.
*
* @addtogroup PPC_BOOT
* @{
*/
#include "boot.h"
#if !defined(__DOXYGEN__)
/* BAM record.*/
.section .boot, "ax"
.long 0x015A0000
.long _reset_address
.align 2
.globl _reset_address
.type _reset_address, @function
_reset_address:
#if BOOT_PERFORM_CORE_INIT
se_bl _coreinit
#endif
se_bl _ivinit
#if BOOT_RELOCATE_IN_RAM
/*
* Image relocation in RAM.
*/
lis r4, __ram_reloc_start__@h
ori r4, r4, __ram_reloc_start__@l
lis r5, __ram_reloc_dest__@h
ori r5, r5, __ram_reloc_dest__@l
lis r6, __ram_reloc_end__@h
ori r6, r6, __ram_reloc_end__@l
.relloop:
cmpl cr0, r4, r6
bge cr0, .relend
lwz r7, 0(r4)
addi r4, r4, 4
stw r7, 0(r5)
addi r5, r5, 4
b .relloop
.relend:
lis r3, _boot_address@h
ori r3, r3, _boot_address@l
mtctr r3
bctrl
#else
e_b _boot_address
#endif
#if BOOT_PERFORM_CORE_INIT
.align 2
_coreinit:
/*
* RAM clearing, this device requires a write to all RAM location in
* order to initialize the ECC detection hardware, this is going to
* slow down the startup but there is no way around.
*/
xor r0, r0, r0
xor r1, r1, r1
xor r2, r2, r2
xor r3, r3, r3
xor r4, r4, r4
xor r5, r5, r5
xor r6, r6, r6
xor r7, r7, r7
xor r8, r8, r8
xor r9, r9, r9
xor r10, r10, r10
xor r11, r11, r11
xor r12, r12, r12
xor r13, r13, r13
xor r14, r14, r14
xor r15, r15, r15
xor r16, r16, r16
xor r17, r17, r17
xor r18, r18, r18
xor r19, r19, r19
xor r20, r20, r20
xor r21, r21, r21
xor r22, r22, r22
xor r23, r23, r23
xor r24, r24, r24
xor r25, r25, r25
xor r26, r26, r26
xor r27, r27, r27
xor r28, r28, r28
xor r29, r29, r29
xor r30, r30, r30
xor r31, r31, r31
e_lis r4, __ram_start__@h
e_or2i r4, __ram_start__@l
e_lis r5, __ram_end__@h
e_or2i r5, __ram_end__@l
.cleareccloop:
se_cmpl r4, r5
se_bge .cleareccend
e_stmw r16, 0(r4)
e_addi r4, r4, 64
se_b .cleareccloop
.cleareccend:
/*
* Branch prediction enabled.
*/
e_li r3, BOOT_BUCSR_DEFAULT
mtspr 1013, r3 /* BUCSR */
se_blr
#endif /* BOOT_PERFORM_CORE_INIT */
/*
* Exception vectors initialization.
*/
.align 2
_ivinit:
/* MSR initialization.*/
e_lis r3, BOOT_MSR_DEFAULT@h
e_ori r3, r3, BOOT_MSR_DEFAULT@l
mtMSR r3
/* IVPR initialization.*/
e_lis r3, __ivpr_base__@h
e_or2i r3, __ivpr_base__@l
mtIVPR r3
se_blr
.section .ivors, "ax"
.globl IVORS
IVORS:
e_b _IVOR0
.align 4
e_b _IVOR1
.align 4
e_b _IVOR2
.align 4
e_b _IVOR3
.align 4
e_b _IVOR4
.align 4
e_b _IVOR5
.align 4
e_b _IVOR6
.align 4
e_b _IVOR7
.align 4
e_b _IVOR8
.align 4
e_b _IVOR9
.align 4
e_b _IVOR10
.align 4
e_b _IVOR11
.align 4
e_b _IVOR12
.align 4
e_b _IVOR13
.align 4
e_b _IVOR14
.align 4
e_b _IVOR15
.section .handlers, "ax"
/*
* Default IVOR handlers.
*/
.align 2
.weak _IVOR0, _IVOR1, _IVOR2, _IVOR3, _IVOR4, _IVOR5
.weak _IVOR6, _IVOR7, _IVOR8, _IVOR9, _IVOR10, _IVOR11
.weak _IVOR12, _IVOR13, _IVOR14, _IVOR15
.weak _unhandled_exception
_IVOR0:
_IVOR1:
_IVOR2:
_IVOR3:
_IVOR5:
_IVOR6:
_IVOR7:
_IVOR8:
_IVOR9:
_IVOR11:
_IVOR12:
_IVOR13:
_IVOR14:
_IVOR15:
_unhandled_exception:
se_b _unhandled_exception
#endif /* !defined(__DOXYGEN__) */
/** @} */
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