diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2022-03-03 22:28:27 +0100 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-03-09 14:21:01 +0000 |
| commit | 2e7e2d978bb2cc29b8b0335d46b3ed90ed36bbcc (patch) | |
| tree | 8a22a8eac3c14bcfa9645e0ff267b619defa8ae7 /src/lib | |
| parent | 63c6d814ce0511d95d4f3ce57bce64743bc084d8 (diff) | |
coreboot_tables.c: Expose the ACPI RSDP
The ACPI RSDP can only be found in:
- legacy BIOS region
- via UEFI service
On some systems like ARM that legacy BIOS region is not an option, so
to avoid needing UEFI it makes sense to expose the RSDP via a coreboot
table entry.
This also adds the respective unit test.
Change-Id: I591312a2c48f0cbbb03b2787e4b365e9c932afff
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62573
Reviewed-by: Lance Zhao
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/coreboot_table.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/lib/coreboot_table.c b/src/lib/coreboot_table.c index d0cba80dcc..3ceab3746f 100644 --- a/src/lib/coreboot_table.c +++ b/src/lib/coreboot_table.c @@ -1,5 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include <acpi/acpi.h> #include <arch/cbconfig.h> #include <console/console.h> #include <console/uart.h> @@ -420,6 +421,16 @@ static unsigned long lb_table_fini(struct lb_header *head) return (unsigned long)rec + rec->size; } +static void lb_add_acpi_rsdp(struct lb_header *head) +{ + struct lb_acpi_rsdp *acpi_rsdp; + struct lb_record *rec = lb_new_record(head); + acpi_rsdp = (struct lb_acpi_rsdp *)rec; + acpi_rsdp->tag = LB_TAG_ACPI_RSDP; + acpi_rsdp->size = sizeof(*acpi_rsdp); + acpi_rsdp->rsdp_pointer = pack_lb64(get_coreboot_rsdp()); +} + size_t write_coreboot_forwarding_table(uintptr_t entry, uintptr_t target) { struct lb_header *head; @@ -523,6 +534,9 @@ static uintptr_t write_coreboot_table(uintptr_t rom_table_end) /* Add all cbmem entries into the coreboot tables. */ cbmem_add_records_to_cbtable(head); + if (CONFIG(HAVE_ACPI_TABLES)) + lb_add_acpi_rsdp(head); + /* Remember where my valid memory ranges are */ return lb_table_fini(head); } |