On RISC-V QEMU provides an XSDT table. The RSDP table points to it.
We must not zero out this pointer because otherwise no ACPI table can be
found.

Fixes: 15ca25e31ed5 ("x86: emulation: Support BLOBLIST_TABLES properly")
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

Note that this undoes the changes of commit cf6d4535cc4c ("x86:
emulation: Disable bloblist for now") as that was intended only for the
release due to time.

The existing QEMU implementation mostly ignored BLOBLIST_TABLES and
allocates the bulk of the tables with malloc(). Update it to place all
tables in the bloblist. Since QEMU declares a size of 128KB regardless
of the size of its tables, this requires a larger bloblist.

Fix up the e820 table to handle this, keeping the old code as an option
for now, to assist with any future bug-fixing.

Signed-off-by: Simon Glass <sjg@chromium.org>

The end of the ACPI table is set to 'addr' instead of 'end'. The ACPI
code for QEMU relies on those values to mark memory as 'ACPI Reclaim'
and as a result the ACPI RSDP ends up in Boot services Data.

Reported-by: Björn Töpel <bjorn@kernel.org>
Fixes: commit 638cc363484b ("acpi: enable writing ACPI tables on QEMU")
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

QEMU can have its own internal ACPI and SMBIOS tables. At present U-Boot
copies out the SMBIOS tables but points directly to the ACPI ones.

The ACPI tables are not aligned on a 4KB boundary, which means that UPL
cannot use them directly, since it uses a reserved-memory node for the
tables and that it assumed (by EDK2) to be 4KB-aligned.

On x86, QEMU provides the tables in a mapped memory region and U-Boot
makes use of these directly, thus making it difficult to use any common
code.

Adjust the logic to fit within the existing table-generation code. Use a
bloblist always and ensure that the ACPI tables is placed in an aligned
region. Set a size of 8K for QEMU. This does not actually put all the
tables in one place, for QEMU, since it currently adds a pointer to the
tables in QFW.

On ARM, enable bloblist so that SMBIOS tables can be added to the
bloblist.

Signed-off-by: Simon Glass <sjg@chromium.org>

Invoke write_acpi_tables() via EVT_LAST_STAGE_INIT on QEMU except on X86.
X86 calls write_acpi_tables() in write_tables().

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

Move the code related to copying tables from QEMU to a separate code
module.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>