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Removed symbols and renamed sections.

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Added bsp_start_memcpy(). Documentation. Changes for external ROM start.
This commit is contained in:
Thomas Doerfler
2009-09-18 08:06:32 +00:00
parent ba938b8d7d
commit 091705c07f
5 changed files with 166 additions and 105 deletions
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7
c/src/lib/libbsp/arm/ChangeLog
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@@ -1,3 +1,10 @@
2009-09-15 Sebastian Huber <sebastian.huber@embedded-brains.de>
* shared/include/linker-symbols.h, shared/startup/linkcmds.base:
Removed symbols and renamed sections.
* shared/include/start.h, shared/start/start.S: Added
bsp_start_memcpy(). Documentation. Changes for external ROM start.
2009-07-15 Sebastian Huber <sebastian.huber@embedded-brains.de>
* shared/irq/irq_asm.S, shared/startup/linkcmds.rom: Removed files.

22
c/src/lib/libbsp/arm/shared/include/linker-symbols.h
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@@ -1,6 +1,8 @@
/**
* @file
*
* @ingroup bsp_linker
*
* @brief Symbols defined in linker command base file.
*/
@@ -20,20 +22,22 @@
#ifndef LIBBSP_ARM_SHARED_LINKER_SYMBOLS_H
#define LIBBSP_ARM_SHARED_LINKER_SYMBOLS_H
/**
* @defgroup bsp_linker Linker Support
*
* @ingroup bsp_kit
*
* @brief Linker support.
*
* @{
*/
#ifndef ASM
#define LINKER_SYMBOL(sym) extern char sym [];
#else
#define LINKER_SYMBOL(sym) .extern sym
#endif
LINKER_SYMBOL(bsp_region_text_begin)
LINKER_SYMBOL(bsp_region_text_end)
LINKER_SYMBOL(bsp_region_text_size)
LINKER_SYMBOL(bsp_region_data_begin)
LINKER_SYMBOL(bsp_region_data_end)
LINKER_SYMBOL(bsp_region_data_size)
LINKER_SYMBOL(bsp_stack_irq_begin)
LINKER_SYMBOL(bsp_stack_irq_end)
LINKER_SYMBOL(bsp_stack_irq_size)
@@ -94,4 +98,6 @@ LINKER_SYMBOL(bsp_section_stack_begin)
LINKER_SYMBOL(bsp_section_stack_end)
LINKER_SYMBOL(bsp_section_stack_size)
/** @} */
#endif /* LIBBSP_ARM_SHARED_LINKER_SYMBOLS_H */

80
c/src/lib/libbsp/arm/shared/include/start.h
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@@ -1,54 +1,74 @@
/**
* @file
*
* @brief Start entry functions.
* @ingroup bsp_start
*
* @brief System low level start.
*/
/*
* Copyright (c) 2008
* Embedded Brains GmbH
* Copyright (c) 2008, 2009
* embedded brains GmbH
* Obere Lagerstr. 30
* D-82178 Puchheim
* Germany
* rtems@embedded-brains.de
* <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.com/license/LICENSE.
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#ifndef LIBBSP_ARM_SHARED_START_H
#define LIBBSP_ARM_SHARED_START_H
#ifndef ASM
#include <stddef.h>
/**
* @brief System start entry.
*/
void start( void);
/**
* @defgroup bsp_start System Start
*
* @ingroup bsp_kit
*
* @brief System low level start.
*
* @{
*/
/**
* @brief Start entry hook 0.
*
* This hook will be called from the start entry code after all modes and
* stack pointers are initialized but before the copying of the exception
* vectors.
*/
void bsp_start_hook_0( void);
/**
* @brief System start entry.
*/
void start(void);
/**
* @brief Start entry hook 1.
*
* This hook will be called from the start entry code after copying of the
* exception vectors but before the call to boot card.
*/
void bsp_start_hook_1( void);
/**
* @brief Start entry hook 0.
*
* This hook will be called from the start entry code after all modes and
* stack pointers are initialized but before the copying of the exception
* vectors.
*/
void bsp_start_hook_0(void);
#else
/**
* @brief Start entry hook 1.
*
* This hook will be called from the start entry code after copying of the
* exception vectors but before the call to boot_card().
*/
void bsp_start_hook_1(void);
.extern bsp_start_hook_0
/**
* @brief Similar to standard memcpy().
*
* The memory areas must be word aligned. Copy code will be executed from the
* stack. If @a dest equals @a src nothing will be copied.
*/
void bsp_start_memcpy(int *dest, const int *src, size_t n);
.extern bsp_start_hook_1
/**
* @brief ARM entry point to bsp_start_memcpy().
*/
void bsp_start_memcpy_arm(int *dest, const int *src, size_t n);
#endif
/** @} */
#endif /* LIBBSP_ARM_SHARED_START_H */

145
c/src/lib/libbsp/arm/shared/start/start.S
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@@ -15,19 +15,23 @@
* The license and distribution terms for this file may be found in the file
* LICENSE in this distribution or at http://www.rtems.com/license/LICENSE.
*/
#include <rtems/asm.h>
#include <bspopts.h>
#include <bsp/linker-symbols.h>
#include <bsp/start.h>
/* External symbols */
.extern bsp_reset
.extern boot_card
.extern bsp_start_hook_0
.extern bsp_start_hook_1
/* Global symbols */
.globl start
.globl SWI_Handler
.globl bsp_start_memcpy
/* Program Status Register definitions */
@@ -42,8 +46,9 @@
.equ PSR_F, 0x40
.equ PSR_T, 0x20
.section ".bsp_start", "ax"
.arm
.section ".bsp_start", "x"
/*
* This is the exception vector table and the pointers to the default
@@ -66,7 +71,11 @@ vector_block:
handler_addr_reset:
#ifdef BSP_START_RESET_VECTOR
.word BSP_START_RESET_VECTOR
#else
.word start
#endif
handler_addr_undef:
@@ -100,63 +109,64 @@ handler_addr_fiq:
start:
/*
* We do not save the context since we do not return to the boot
* loader.
*/
/*
* We do not save the context since we do not return to the boot
* loader.
*/
/*
* Set SVC mode, disable interrupts and enable ARM instructions.
*/
/*
* Set SVC mode, disable interrupts and enable ARM instructions.
*/
mov r0, #(PSR_MODE_SVC | PSR_I | PSR_F)
msr cpsr, r0
/* Initialize stack pointer registers for the various modes */
/* Initialize stack pointer registers for the various modes */
/* Enter IRQ mode and set up the IRQ stack pointer */
/* Enter IRQ mode and set up the IRQ stack pointer */
mov r0, #(PSR_MODE_IRQ | PSR_I | PSR_F)
msr cpsr, r0
ldr sp, =bsp_stack_irq_end
/* Enter FIQ mode and set up the FIQ stack pointer */
/* Enter FIQ mode and set up the FIQ stack pointer */
mov r0, #(PSR_MODE_FIQ | PSR_I | PSR_F)
msr cpsr, r0
ldr sp, =bsp_stack_fiq_end
/* Enter ABT mode and set up the ABT stack pointer */
/* Enter ABT mode and set up the ABT stack pointer */
mov r0, #(PSR_MODE_ABT | PSR_I | PSR_F)
msr cpsr, r0
ldr sp, =bsp_stack_abt_end
/* Enter UNDEF mode and set up the UNDEF stack pointer */
/* Enter UNDEF mode and set up the UNDEF stack pointer */
mov r0, #(PSR_MODE_UNDEF | PSR_I | PSR_F)
msr cpsr, r0
ldr sp, =bsp_stack_undef_end
/* Enter SVC mode and set up the SVC stack pointer */
/* Enter SVC mode and set up the SVC stack pointer */
mov r0, #(PSR_MODE_SVC | PSR_I | PSR_F)
msr cpsr, r0
ldr sp, =bsp_stack_svc_end
/* Stay in SVC mode */
/* Stay in SVC mode */
/* Brach to start hook 0 */
#ifdef __thumb__
ldr r3, =bsp_start_hook_0
mov lr, pc
bx r3
.thumb
bx pc
nop
.arm
#else
bl bsp_start_hook_0
#endif
/*
* Branch to start hook 0.
*
* This code up to the start hook 0 may run with an address offset so
* it must be position independent. After the start hook 0 it is
* assumed that the code can run at its intended position. The link
* register will be loaded with the absolute address.
*/
/*
ldr lr, =bsp_start_hook_0_done
b bsp_start_hook_0
bsp_start_hook_0_done:
/*
* Initialize the exception vectors. This includes the exceptions
* vectors and the pointers to the default exception handlers.
*/
*/
ldr r0, =bsp_section_vector_begin
adr r1, vector_block
@@ -165,26 +175,15 @@ start:
ldmia r1!, {r2-r9}
stmia r0!, {r2-r9}
/* Brach to start hook 1 */
#ifdef __thumb__
ldr r3, =bsp_start_hook_1
mov lr, pc
bx r3
.thumb
bx pc
nop
.arm
#else
/* Branch to start hook 1 */
bl bsp_start_hook_1
#endif
/* Brach to boot card */
/* Branch to boot card */
mov r0, #0
#ifdef __thumb__
ldr r3, =boot_card
mov lr, pc
bx r3
mov lr, pc
bx r3
.thumb
bx pc
nop
@@ -193,11 +192,11 @@ start:
bl boot_card
#endif
/* Branch to reset function */
/* Branch to reset function */
#ifdef __thumb__
ldr r3, =bsp_reset
mov lr, pc
bx r3
mov lr, pc
bx r3
.thumb
bx pc
nop
@@ -206,10 +205,50 @@ start:
bl bsp_reset
#endif
/* Spin forever */
SWI_Handler:
/* Spin forever */
twiddle:
b twiddle
DEFINE_FUNCTION_ARM(bsp_start_memcpy)
/* Return if dest == src */
cmp r0, r1
bxeq lr
/* Return if length is zero */
mov r3, #0
cmp r3, r2
bxeq lr
/* Save non-volatile registers */
push {r4-r8, lr}
/* Copy worker routine to stack */
adr ip, bsp_start_memcpy_begin
ldm ip, {r3-r8}
push {r3-r8}
/* Execute worker routine */
mov r3, #0
mov ip, sp
mov lr, pc
bx ip
/* Restore stack and non-volatile registers */
add sp, sp, #24
pop {r4-r8, lr}
/* Return */
bx lr
bsp_start_memcpy_begin:
/* Worker routine */
ldr ip, [r1, r3]
str ip, [r0, r3]
add r3, r3, #4
cmp r3, r2
bcc bsp_start_memcpy_begin
bx lr

17
c/src/lib/libbsp/arm/shared/startup/linkcmds.base
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@@ -1,6 +1,8 @@
/**
* @file
*
* @ingroup bsp_linker
*
* @brief Linker command base file.
*/
@@ -30,14 +32,6 @@ bsp_section_align = 32;
bsp_stack_align = 4;
bsp_region_text_begin = ORIGIN (REGION_TEXT);
bsp_region_text_size = LENGTH (REGION_TEXT);
bsp_region_text_end = bsp_region_text_begin + bsp_region_text_size;
bsp_region_data_begin = ORIGIN (REGION_DATA);
bsp_region_data_size = LENGTH (REGION_DATA);
bsp_region_data_end = bsp_region_data_begin + bsp_region_data_size;
/*
* BSP: Symbols that may be defined externally
*/
@@ -138,11 +132,6 @@ SECTIONS {
*/
bsp_section_text_begin = .;
/*
* BSP: System startup entry
*/
KEEP (*(.bsp_start))
/*
* BSP: Moved into .text from .init
*/
@@ -290,7 +279,7 @@ SECTIONS {
.fast : {
bsp_section_fast_begin = .;
*(.fast)
*(.bsp_fast)
. = ALIGN (bsp_section_align);