brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-06-09 23:36:03 +09:00
Code Issues Projects Releases Wiki Activity

x86: Allow devices to write to DSDT

Browse Source 
Call the new core function to inject ASL programmatically into the DSDT.
This is made up of fragments generated by devices that have the
inject_dsdt() method. The normal, compiled ASL file is added after this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-07-07 13:12:09 -06:00 committed by Bin Meng
parent 01694589af
commit 58a6ccd34e
1 changed files with 15 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/x86/lib/acpi_table.c
View File

@ -406,11 +406,20 @@ ulong write_acpi_tables(ulong start_addr)
debug("ACPI: * DSDT\n");
dsdt = ctx->current;
/* Put the table header first */
memcpy(dsdt, &AmlCode, sizeof(struct acpi_table_header));
acpi_inc(ctx, sizeof(struct acpi_table_header));
/* If the table is not empty, allow devices to inject things */
if (dsdt->length >= sizeof(struct acpi_table_header))
acpi_inject_dsdt(ctx);
/* Copy in the AML code itself if any (after the header) */
memcpy(ctx->current,
(char *)&AmlCode + sizeof(struct acpi_table_header),
dsdt->length - sizeof(struct acpi_table_header));
acpi_inc_align(ctx, dsdt->length - sizeof(struct acpi_table_header));
/* Pack GNVS into the ACPI table area */
@ -425,7 +434,12 @@ ulong write_acpi_tables(ulong start_addr)
}
}
/* Update DSDT checksum since we patched the GNVS address */
/*
* Recalculate the length and update the DSDT checksum since we patched
* the GNVS address. Set the checksum to zero since it is part of the
* region being checksummed.
*/
dsdt->length = ctx->current - (void *)dsdt;
dsdt->checksum = 0;
dsdt->checksum = table_compute_checksum((void *)dsdt, dsdt->length);