forked from Imagelibrary/rtems
152 lines
3.5 KiB
C
152 lines
3.5 KiB
C
/**
|
|
* @file
|
|
*
|
|
* @ingroup arm_start
|
|
*
|
|
* @brief Rasberry Pi startup code.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2013. Hesham AL-Matary
|
|
* Copyright (c) 2013 by Alan Cudmore
|
|
* based on work by:
|
|
* Copyright (c) 2009 embedded brains GmbH. All rights reserved.
|
|
*
|
|
* 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 <bspopts.h>
|
|
#include <bsp/start.h>
|
|
#include <bsp/raspberrypi.h>
|
|
#include <libcpu/arm-cp15.h>
|
|
#include <bsp.h>
|
|
#include <bsp/bootcard.h>
|
|
#include <bsp/linker-symbols.h>
|
|
#include <bsp/arm-cp15-start.h>
|
|
|
|
#include <rtems/sysinit.h>
|
|
|
|
#ifdef RTEMS_SMP
|
|
#include <rtems/score/smp.h>
|
|
#endif
|
|
|
|
#if defined(HAS_UBOOT) && !defined(BSP_DISABLE_UBOOT_WORK_AREA_CONFIG)
|
|
#define USE_UBOOT
|
|
#endif
|
|
|
|
#ifdef USE_UBOOT
|
|
#include <bsp/u-boot.h>
|
|
#else
|
|
#include <bsp/vc.h>
|
|
#endif
|
|
|
|
BSP_START_DATA_SECTION static arm_cp15_start_section_config
|
|
raspberrypi_mmu_config_table[] = {
|
|
ARMV7_CP15_START_DEFAULT_SECTIONS,
|
|
{
|
|
.begin = RPI_PERIPHERAL_BASE,
|
|
.end = RPI_PERIPHERAL_BASE + RPI_PERIPHERAL_SIZE,
|
|
.flags = ARMV7_MMU_DEVICE
|
|
}
|
|
#if (BSP_IS_RPI2 == 1)
|
|
/* Core local peripherals area - timer, mailboxes */
|
|
, {
|
|
.begin = BCM2836_CORE_LOCAL_PERIPH_BASE,
|
|
.end = BCM2836_CORE_LOCAL_PERIPH_BASE + BCM2836_CORE_LOCAL_PERIPH_SIZE,
|
|
.flags = ARMV7_MMU_DEVICE
|
|
}
|
|
#endif
|
|
};
|
|
|
|
void BSP_START_TEXT_SECTION bsp_start_hook_0(void)
|
|
{
|
|
/* Clear Translation Table Base Control Register */
|
|
arm_cp15_set_translation_table_base_control_register(0);
|
|
|
|
#ifdef RTEMS_SMP
|
|
if (_SMP_Get_current_processor() == 0) {
|
|
rpi_ipi_initialize();
|
|
} else {
|
|
rpi_start_rtems_on_secondary_processor();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
BSP_START_TEXT_SECTION static uintptr_t raspberrypi_get_ram_end(void)
|
|
{
|
|
uintptr_t ram_end;
|
|
|
|
#ifdef USE_UBOOT
|
|
ram_end = (uintptr_t) bsp_uboot_board_info.bi_memstart +
|
|
bsp_uboot_board_info.bi_memsize;
|
|
#else
|
|
bcm2835_get_arm_memory_entries spec;
|
|
|
|
if (bcm2835_mailbox_get_arm_memory( &spec ) >= 0) {
|
|
ram_end = spec.base + spec.size;
|
|
} else {
|
|
/* Use the workspace end from the linker command file for fallback. */
|
|
ram_end = (uintptr_t) bsp_section_work_end;
|
|
}
|
|
#endif
|
|
|
|
return ram_end;
|
|
}
|
|
|
|
BSP_START_TEXT_SECTION static void bsp_memory_management_initialize(void)
|
|
{
|
|
uintptr_t ram_end = raspberrypi_get_ram_end();
|
|
uint32_t ctrl = arm_cp15_get_control();
|
|
|
|
ctrl |= ARM_CP15_CTRL_AFE | ARM_CP15_CTRL_S | ARM_CP15_CTRL_XP;
|
|
|
|
raspberrypi_mmu_config_table[ARMV7_CP15_START_WORKSPACE_ENTRY_INDEX].end =
|
|
ram_end;
|
|
|
|
arm_cp15_start_setup_translation_table_and_enable_mmu_and_cache(
|
|
ctrl,
|
|
(uint32_t *) bsp_translation_table_base,
|
|
ARM_MMU_DEFAULT_CLIENT_DOMAIN,
|
|
&raspberrypi_mmu_config_table[0],
|
|
RTEMS_ARRAY_SIZE(raspberrypi_mmu_config_table)
|
|
);
|
|
}
|
|
|
|
void BSP_START_TEXT_SECTION bsp_start_hook_1(void)
|
|
{
|
|
bsp_start_copy_sections();
|
|
bsp_memory_management_initialize();
|
|
bsp_start_clear_bss();
|
|
|
|
rpi_video_init();
|
|
}
|
|
|
|
static Memory_Area _Memory_Areas[1];
|
|
|
|
static void bsp_memory_initialize(void)
|
|
{
|
|
_Memory_Initialize(
|
|
&_Memory_Areas[0],
|
|
(void *)
|
|
raspberrypi_mmu_config_table[ARMV7_CP15_START_WORKSPACE_ENTRY_INDEX].begin,
|
|
(void *)
|
|
raspberrypi_mmu_config_table[ARMV7_CP15_START_WORKSPACE_ENTRY_INDEX].end
|
|
);
|
|
}
|
|
|
|
RTEMS_SYSINIT_ITEM(
|
|
bsp_memory_initialize,
|
|
RTEMS_SYSINIT_MEMORY,
|
|
RTEMS_SYSINIT_ORDER_MIDDLE
|
|
);
|
|
|
|
static const Memory_Information _Memory_Information =
|
|
MEMORY_INFORMATION_INITIALIZER(_Memory_Areas);
|
|
|
|
const Memory_Information *_Memory_Get(void)
|
|
{
|
|
return &_Memory_Information;
|
|
}
|