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 ---
(no changes since v3)
Changes in v3: - Refactor the code to remove the extra memcpy() - Recalculate the DSDT checksum only once - Add a comment as to why the checksum byte is set to 0
arch/x86/lib/acpi_table.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c index 4658d88351..eeacfe9b06 100644 --- a/arch/x86/lib/acpi_table.c +++ b/arch/x86/lib/acpi_table.c @@ -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);