Note that the auto-generated kernel_devices will differ slightly from
the ones present in the kernel until now. When devices have
registers that aren't page-aligned we now always set the appropriate
PPTR to be the start address of the device, while previously the PPTR
was sometimes page-aligned.
Specifically, this change to PPTRs affects:
- bcm2837 intc
- bcm2837 uart
- allwinnerA20 timer
* Also document the reason why the particular address for KS_LOG_PPTR was chosen.
This patch adds a pointer to the PD entry that sets the benchmark log frame.
- seL4_UserTop is a new constant which represents the top of virtual
memory available to user level
- this commit also rationalises several constants (USER_TOP, kernelBase)
and moves them to the arch level, such that ports only need to define
seL4_UserTop.
Leaves the last entry in the top level page table free so that it can be used for mapping
devices in the future. This moves the kernel image down to the second last entry in the
top level page table. Leaving the last entry in the top level page table also matches the
rv64 design.
This change is required because the zedboard rocket-chip only has
256MiB of memory. Therefore the load address needs to be lowered
to fit in the available range.
This change will also require the kernel to be mapped with 2MiB
granularity so everything is properly page aligned.
Change-Id: I75ddec0be1bb2fd05d0a947ea19bce46e2cd9f96
rpi3 documentation states RAM *should* be mapped from 0x00000000 onwards,
but we omit the start of physical memory as it caused early boot issues
on access. Instead use u-boot's default kernel load address as PHYS_BASE.
Several of the mapping calculations rollover when dealing with 32-bits due to the location
of memory on spike, the kernel/user window addresses, and the kernel load address.
Adjust the kernel window so that it covers the typical location of memory on
spike.
Rewrites the FDT code to remove all the disallowed function pointers have attempt to perform
the equivalent functionality of query_mem in place in the main parser. With the callback
system gone all the rest of the unused FDT code is deleted as it doesn't make sense.
Restructures the kernel window so that instead of being a single contiguous region with
a single offset to physical memory, it is two such regions. This allows us to use the
larger of the two windows as a window into physical memory, and the second smaller window
as a place to run the kernel image from. Having this additional window allows us to
link the kernel for different physical addresses without needing to change its virtual
address, or change the layout of the kernel window.
There are other ways to achieve this, but this is one of the simplest and matches how
x86-64 implements its kernel window.
This removes some duplicate (and incorrect) definitions that already exist in common
code and removes some unimplemented functions that are not used due to the current
absence of capDL dump support
Restricting virtual addresses to essentially be only addresses without bit 47 set
allows us to not need to check that an address passed in by the user is canonical
or not. Any address that is in danger of not being canonical (has bit 47 set but
not bits 48 to 63) will all by higher than USER_TOP and will not be permitted.
- for arm generic timer platforms, we remove resetTimer ->
resetGenericTimer indirection and simply include generic_timer.h
- this reduces boiler plate for platforms that share timer drivers, as
they simply include the one header
- there is far more timer code in the RT kernel, which motivates this
change
This prepares for inlinining the generic timer in header files, which will reduce the
redundancy for all platforms that use it.
Since mct.c shared code with the generic timer, both could not define a
resetTimer function. This commit splits the logic and definitions used
by exynos4 and exynos4* into common definitions in mct.h, with the
unique code for both in hardware.c
The CParser can't deduce modifies rules for functions without
definitions (like in8, out8 et al and interrupt handler functions).
This adds explicit modifies rules for these functions.
RSDP validation was previously done directly in acpi_init. This splits the validation
into a seperate, publicly useable, function. The intention is for this to be used in
boot scenarios where an RSDP is given and does not need to be searched for.
The full RSDP is useful beyond just extracting the RSDT address out of it. In particular
this prepares us for being able to pass a copy of the RSDP to the rootserver.
The previous function signature might lead a user to believe that they were getting a
pointer to a useable acpi_rsdt_t structure. This was in fact not the case and was
actually returning the physical address, that may or may not be mapped in, of the rsdt
table. All of the other acpi *_scan functions would therefore immediately map in the physical
rsdt pointer they were given.
This commit changes acpi_init to return a boolean indicating whether it found a valid
rsdp, and then fills in a copy of the rsdp data. The copy is necessary as the rsdp
data may be at a temporary mapping.
As a result of changing acpi_init the boot code and state is changed to have a acpi_rsdt_t
instance that can be filled out.
Split up the bit specific code into new folders and added 64-bit
support. Also, changed the device register sizes to be based off of
PAGE_BITS instead of a hardcoded number.
TIMER_CLOCK_HZ is set to the default clock rate from the ATF,
which is the same for both AARCH32 and AARCH64.It may require changes
to the FSBL to work correctly.
The Zynq UltraScale+ MPSoC (PLAT zynqmp) is a Multi-Processor SOC
made by Xilinx that has a quad-core Cortex-A53, a dual-core Cortex-R5
and an FPGA.
This adds 32-bit, single-core support on the the Cortex-A53 cluster.
This renames the previous irq_t enum into a platform_irq_t enum and provides irq_t
as a 'well defined' uint8_t typedef. Having irq_t be an integer type, and not an enum,
is necessary for consistency with verification. As part of explicitly defining irq_t
as an unsigned integer type the definition of irqInvalid is changed to prevent sign
extension leading to unexpected invalid comparisons.
The IOMMU implementation is not going to be verified at the moment, and so the code for
it needs to be hidden from verification, which we do by #ifdef'ing it out if the IOMMU
is not enabled. As a result the IOMMU configuration depends on a non verification target
When performing non standalone builds a separate autoconf.h file is generated and defines
the configuration of the kernel. Currently the directory with that file as well as the
kernels include/plat/${PLAT} directory are both listed as include directories to the
compiler. Due to the directory with the generated autoconf.h being earlier in the -I
list the generated autoconf.h will be used in preference to the standalone autoconf.h.
Relying on the order of -I directives is too unstable and so this commit moves the
autoconf.h files to a dedicated configs directory, which is only added as a -I
directive if a standalone build is being performed.
