From d3ccaff827cef5a5c5a0f3c97e1e2e6d99f618cb Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Tue, 3 Feb 2009 14:43:04 +0800 Subject: [PATCH] ACPICA: Add override for dynamic tables Add a call to acpi_os_table_override during the installation of a dynamic table (loaded via the Load or LoadTable AML operators). Signed-off-by: Bob Moore Signed-off-by: Lin Ming Signed-off-by: Len Brown --- drivers/acpi/acpica/tbinstal.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c index 37374b21969..ef269a297b5 100644 --- a/drivers/acpi/acpica/tbinstal.c +++ b/drivers/acpi/acpica/tbinstal.c @@ -103,7 +103,9 @@ acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc) * * RETURN: Status * - * DESCRIPTION: This function is called to add the ACPI table + * DESCRIPTION: This function is called to add an ACPI table. It is used to + * dynamically load tables via the Load and load_table AML + * operators. * ******************************************************************************/ @@ -112,6 +114,7 @@ acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index) { u32 i; acpi_status status = AE_OK; + struct acpi_table_header *override_table = NULL; ACPI_FUNCTION_TRACE(tb_add_table); @@ -201,6 +204,29 @@ acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index) } } + /* + * ACPI Table Override: + * Allow the host to override dynamically loaded tables. + */ + status = acpi_os_table_override(table_desc->pointer, &override_table); + if (ACPI_SUCCESS(status) && override_table) { + ACPI_INFO((AE_INFO, + "%4.4s @ 0x%p Table override, replaced with:", + table_desc->pointer->signature, + ACPI_CAST_PTR(void, table_desc->address))); + + /* We can delete the table that was passed as a parameter */ + + acpi_tb_delete_table(table_desc); + + /* Setup descriptor for the new table */ + + table_desc->address = ACPI_PTR_TO_PHYSADDR(override_table); + table_desc->pointer = override_table; + table_desc->length = override_table->length; + table_desc->flags = ACPI_TABLE_ORIGIN_OVERRIDE; + } + /* Add the table to the global root table list */ status = acpi_tb_store_table(table_desc->address, table_desc->pointer, -- 2.41.1