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/acpi | |
| 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/acpi')
| -rw-r--r-- | src/acpi/acpi.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/acpi/acpi.c b/src/acpi/acpi.c index e03c7f4913..78d5f07045 100644 --- a/src/acpi/acpi.c +++ b/src/acpi/acpi.c @@ -1582,6 +1582,13 @@ void preload_acpi_dsdt(void) cbfs_preload(file); } +static uintptr_t coreboot_rsdp; + +uintptr_t get_coreboot_rsdp(void) +{ + return coreboot_rsdp; +} + unsigned long write_acpi_tables(unsigned long start) { unsigned long current; @@ -1689,6 +1696,7 @@ unsigned long write_acpi_tables(unsigned long start) /* We need at least an RSDP and an RSDT Table */ rsdp = (acpi_rsdp_t *) current; + coreboot_rsdp = (uintptr_t)rsdp; current += sizeof(acpi_rsdp_t); current = acpi_align_current(current); rsdt = (acpi_rsdt_t *) current; |