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/**
* @file
*
* @ingroup qoriq
*
* @brief BSP start.
*/
/*
* Copyright (c) 2010, 2016 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <rtems/score/percpu.h>
#include <bspopts.h>
#include <libcpu/powerpc-utility.h>
#include <bsp/vectors.h>
#if (QORIQ_INITIAL_MSR & MSR_FP) != 0
#define INITIALIZE_FPU
#endif
#define FIRST_TLB 0
#define SCRATCH_TLB QORIQ_TLB1_ENTRY_COUNT - 1
#define INITIAL_MSR r14
#define START_STACK r15
#define SAVED_LINK_REGISTER r16
.globl _start
#ifdef RTEMS_SMP
#if QORIQ_THREAD_COUNT > 1
.globl _start_thread
#endif
.globl _start_secondary_processor
#endif
.globl bsp_exc_vector_base
.section ".bsp_start_text", "ax"
_start:
bl .Linitearly
bl bsp_fdt_copy
#ifdef QORIQ_HAS_WRITE_BACK_L1_CACHE
LWI r3, bsp_section_start_begin
LWI r4, bsp_section_data_load_end
sub r4, r4, r3
bl rtems_cache_flush_multiple_data_lines
#else
bl qoriq_l1cache_invalidate
#endif
#ifdef QORIQ_CLUSTER_1_L2CSR0
LWI r3, QORIQ_CLUSTER_1_L2CSR0
bl qoriq_l2cache_flush_invalidate
#endif
#ifdef QORIQ_CLUSTER_2_L2CSR0
LWI r3, QORIQ_CLUSTER_2_L2CSR0
bl qoriq_l2cache_flush_invalidate
#endif
#ifdef QORIQ_CLUSTER_3_L2CSR0
LWI r3, QORIQ_CLUSTER_3_L2CSR0
bl qoriq_l2cache_flush_invalidate
#endif
/* Get start stack */
LWI START_STACK, start_stack_end
bl .Linitmore
/* Copy fast text */
LWI r3, bsp_section_fast_text_begin
LWI r4, bsp_section_fast_text_load_begin
LWI r5, bsp_section_fast_text_size
bl .Lcopy
/* Copy read-only data */
LWI r3, bsp_section_rodata_begin
LWI r4, bsp_section_rodata_load_begin
LWI r5, bsp_section_rodata_size
bl .Lcopy
/* Copy fast data */
LWI r3, bsp_section_fast_data_begin
LWI r4, bsp_section_fast_data_load_begin
LWI r5, bsp_section_fast_data_size
bl .Lcopy
/* Copy data */
LWI r3, bsp_section_data_begin
LWI r4, bsp_section_data_load_begin
LWI r5, bsp_section_data_size
bl .Lcopy
/* NULL pointer access protection (only core 0 has to do this) */
mfspr r3, BOOKE_PIR
cmpwi r3, 0
bne .Lnull_area_setup_done
LWI r3, bsp_section_start_begin
srawi r3, r3, 2
mtctr r3
li r3, -4
LWI r4, 0x44000002
.Lnull_area_setup_loop:
stwu r4, 4(r3)
bdnz .Lnull_area_setup_loop
.Lnull_area_setup_done:
li r3, 1
bl .Linitmmu
/* Clear SBSS */
LWI r3, bsp_section_sbss_begin
LWI r4, bsp_section_sbss_size
bl bsp_start_zero
/* Clear BSS */
LWI r3, bsp_section_bss_begin
LWI r4, bsp_section_bss_size
bl bsp_start_zero
/* Set up EABI and SYSV environment */
bl __eabi
/* Clear command line */
li r3, 0
bl boot_card
.Lcopy:
cmpw r3, r4
beqlr
b memcpy
.Linitearly:
/*
* Do not use r3 here, since it holds the FDT base pointer provided by
* the boot loader.
*/
/* Disable decrementer */
mfspr r0, BOOKE_TCR
LWI r4, BOOKE_TCR_DIE
andc r0, r0, r4
mtspr BOOKE_TCR, r0
#ifdef QORIQ_INITIAL_SPEFSCR
/* SPEFSCR initialization */
LWI r0, QORIQ_INITIAL_SPEFSCR
mtspr FSL_EIS_SPEFSCR, r0
#endif
#ifdef QORIQ_INITIAL_BUCSR
/* BUCSR initialization */
LWI r0, QORIQ_INITIAL_BUCSR
mtspr FSL_EIS_BUCSR, r0
isync
#endif
#ifdef QORIQ_INITIAL_HID0
/* HID0 initialization */
LWI r0, QORIQ_INITIAL_HID0
mtspr HID0, r0
#endif
/* Invalidate TLS anchor */
li r2, 0
/* Set small-data anchor */
LA r13, _SDA_BASE_
#ifdef RTEMS_SMP
SET_SELF_CPU_CONTROL r4
#endif
blr
.Linitmore:
mflr SAVED_LINK_REGISTER
/* Invalidate all TS1 MMU entries */
li r3, 1
bl qoriq_tlb1_invalidate_all_by_ts
/* Add TS1 entry for the first 4GiB of RAM */
li r3, SCRATCH_TLB
li r4, FSL_EIS_MAS1_TS
li r5, FSL_EIS_MAS2_I
li r6, FSL_EIS_MAS3_SR | FSL_EIS_MAS3_SW | FSL_EIS_MAS3_SX
li r7, 0
li r8, 0
li r9, 11
bl qoriq_tlb1_write
/* MSR initialization and use TS1 for address translation */
LWI INITIAL_MSR, QORIQ_INITIAL_MSR
ori r0, INITIAL_MSR, MSR_IS | MSR_DS
mtmsr r0
isync
/*
* Initialize start stack. Make sure that we do not share a cache line
* with the heap block management, since initial stacks for the
* secondary processors are allocated from the workspace.
*/
subi r1, START_STACK, 2 * PPC_DEFAULT_CACHE_LINE_SIZE
clrrwi r1, r1, PPC_DEFAULT_CACHE_LINE_POWER
li r0, 0
stw r0, 0(r1)
#ifdef INITIALIZE_FPU
bl .Linitfpu
#endif
mtlr SAVED_LINK_REGISTER
blr
.Linitmmu:
mflr SAVED_LINK_REGISTER
/* Configure MMU */
li r4, FIRST_TLB
li r5, SCRATCH_TLB
bl qoriq_mmu_config
mtmsr INITIAL_MSR
isync
li r3, SCRATCH_TLB
bl qoriq_tlb1_invalidate
mtlr SAVED_LINK_REGISTER
blr
#ifdef INITIALIZE_FPU
/*
* Write a value to the FPRs to initialize the hidden tag bits. See
* also "Core Software Initialization Requirements" of the e500mc
* reference manual for example.
*/
.Linitfpu:
li r0, 0
stw r0, 0(r1)
stw r0, 4(r1)
lfd f0, 0(r1)
fmr f1, f0
fmr f2, f0
fmr f3, f0
fmr f4, f0
fmr f5, f0
fmr f6, f0
fmr f7, f0
fmr f8, f0
fmr f9, f0
fmr f10, f0
fmr f11, f0
fmr f12, f0
fmr f13, f0
fmr f14, f0
fmr f15, f0
fmr f16, f0
fmr f17, f0
fmr f18, f0
fmr f19, f0
fmr f20, f0
fmr f21, f0
fmr f22, f0
fmr f23, f0
fmr f24, f0
fmr f25, f0
fmr f26, f0
fmr f27, f0
fmr f28, f0
fmr f29, f0
fmr f30, f0
fmr f31, f0
blr
#endif
#ifdef RTEMS_SMP
#if QORIQ_THREAD_COUNT > 1
_start_thread:
/* Adjust PIR */
mfspr r0, BOOKE_PIR
srawi r0, r0, 2
ori r0, r0, 1
mtspr BOOKE_PIR, r0
bl .Linitearly
/* Initialize start stack */
GET_SELF_CPU_CONTROL r3
lwz r3, PER_CPU_INTERRUPT_STACK_HIGH(r3)
subi r1, r3, PPC_MINIMUM_STACK_FRAME_SIZE
clrrwi r1, r1, PPC_STACK_ALIGN_POWER
li r0, 0
stw r0, 0(r1)
#ifdef INITIALIZE_FPU
bl .Linitfpu
#endif
b qoriq_start_thread
#endif
_start_secondary_processor:
bl .Linitearly
/* Get start stack */
mr START_STACK, r3
bl .Linitmore
li r3, 0
bl .Linitmmu
b bsp_start_on_secondary_processor
#endif /* RTEMS_SMP */
/* Exception vector prologues area */
.section ".bsp_start_text", "ax"
.align 4
bsp_exc_vector_base:
stw r1, ppc_exc_lock_crit@sdarel(r13)
stw r4, ppc_exc_vector_register_crit@sdarel(r13)
li r4, -32767
b ppc_exc_wrap_bookE_crit
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 2
b ppc_exc_wrap_nopush_e500_mchk
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 3
b ppc_exc_wrap_nopush_std
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 4
b ppc_exc_wrap_nopush_std
stwu r1, -CPU_INTERRUPT_FRAME_SIZE(r1)
#ifndef PPC_EXC_CONFIG_USE_FIXED_HANDLER
stw r4, PPC_EXC_VECTOR_PROLOGUE_OFFSET(r1)
li r4, -32763
#endif
b ppc_exc_wrap_async_normal
#ifdef PPC_EXC_CONFIG_USE_FIXED_HANDLER
nop
nop
#endif
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 6
b ppc_exc_wrap_nopush_std
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 7
b ppc_exc_wrap_nopush_std
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 8
b ppc_exc_wrap_nopush_std
system_call:
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 12
b ppc_exc_wrap_nopush_std
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 24
b ppc_exc_wrap_nopush_std
stwu r1, -CPU_INTERRUPT_FRAME_SIZE(r1)
#ifndef PPC_EXC_CONFIG_USE_FIXED_HANDLER
stw r4, PPC_EXC_VECTOR_PROLOGUE_OFFSET(r1)
li r4, -32752
#endif
b ppc_exc_wrap_async_normal
#ifdef PPC_EXC_CONFIG_USE_FIXED_HANDLER
nop
nop
#endif
stwu r1, -CPU_INTERRUPT_FRAME_SIZE(r1)
#ifndef PPC_EXC_CONFIG_USE_FIXED_HANDLER
stw r4, PPC_EXC_VECTOR_PROLOGUE_OFFSET(r1)
li r4, -32749
#endif
b ppc_exc_wrap_async_normal
#ifdef PPC_EXC_CONFIG_USE_FIXED_HANDLER
nop
nop
#endif
stw r1, ppc_exc_lock_crit@sdarel(r13)
stw r4, ppc_exc_vector_register_crit@sdarel(r13)
li r4, -32748
b ppc_exc_wrap_bookE_crit
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 18
b ppc_exc_wrap_nopush_std
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 17
b ppc_exc_wrap_nopush_std
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 13
b ppc_exc_wrap_nopush_bookE_crit
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 10
b ppc_exc_wrap_nopush_std
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 25
b ppc_exc_wrap_nopush_std
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 26
b ppc_exc_wrap_nopush_std
stwu r1, -EXC_GENERIC_SIZE(r1)
stw r4, GPR4_OFFSET(r1)
li r4, 15
b ppc_exc_wrap_nopush_std
/* Symbol provided for debugging and tracing */
bsp_exc_vector_end:
/* Start stack area */
.section ".bsp_rwextra", "aw", @nobits
.align 4
.space 4096
start_stack_end:
|
