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image and correct RPi2 boot on 4.11 branch.
This is minimized version of mainline patch
arm/raspberrypi: move MMU in front of application image to respect variable memory size.
plus correction which has been part of other mainline patches.
This is end of series which allows 4.11 to boot on Raspberry Pi.
Closes #2782
Closes #2783
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later to RO.
Enable even the first megabyte of SDRAM to be cache-able after
problems with stale cache content has been resolved by previous commit.
Because major part of application usually fits to the first
megabyte this speedups test dhrystone application by factor 40.
Updates #2783
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levels.
This fix strange behavior where some stale content has been
stored in level 2 cache before RTEMS has been start from U-boot
which has reappeared after MMU enable and shadow vector
table at start of SDRAM.
Updates #2782
Updates #2783
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The current versions of U-boot start kernel/RTEMS application image
with instruction and data caches enabled and it sets exception
base register to new address after its self-relocation.
ldr r0, [r9, #GD_RELOCADDR] /* r0 = gd->relocaddr */
mcr p15, 0, r0, c12, c0, 0 /* Set VBAR */
Included changes in bsp_start_hook_0 restore default state to
allow RTEMS image to run after startup from newer U-boot version
on Raspberry Pi.
Clear interrupt enable registers in interrupt controller
to ensure that RTEMS starts from well defined state.
Updates #2783
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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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