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This patch adds a BSP variant for the Raspberry Pi 2. You can
build both variants by configuring with the option
--enable-rtemsbsp="raspberrypi2 raspberrypi"
For the current BSP, the only change was the peripheral register base
address and the compiler options.
The raspberrypi/make/custom rules were re-factored:
raspberrypi.inc -- Common rules
raspberrypi.cfg -- Raspberry Pi 1 specific rule/optons
raspberrypi2.cfg -- Raspberry Pi 2 specific rule/options
I tested hello, ticker, unlimited, and paranoia on both the Pi (Model A+)
and Pi 2.
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This section can be use to provide a cache coherent memory area via
rtems_cache_coherent_add_area().
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Rename bsp_mm_config_table to arm_cp15_start_mmu_config_table and
rename bsp_mm_config_table_size to arm_cp15_start_mmu_config_table_size
to be in line with the other names in <bsp/arm-cp15-start.h>.
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Define ARM_CP15_TEXT_SECTION to BSP_START_TEXT_SECTION so that the
start code is in the right section.
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Delete ARMV7_MMU_DATA_READ_WRITE_SHAREABLE and move RTEMS_SMP
specific MMU attribute settings to arm-cp15.h.
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Changes include reverting back to setting all page-table section entries
as invalid and modify mm_config_table to apply the correct memory attributes
for raspbberypi memory sections at startup. The newly added entry at mm_config_table
maps raspberrypi GPIO and other registers found at raspberrypi.h
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Add support for MMU initialization for RaspberryPi. Introduce new shared
MMU configuration table that can be used by other BSPs that call the
arm_cp15_start_setup_translation_table_and_enable_mmu_and_cache function.
Demonstrate the use of the generic table with RaspberryPi.
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