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acpi: Drop code for missing XSDT from acpi_write_rsdp()

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We don't actually support tables without an XSDT so we can drop this dead
code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
This commit is contained in:
Simon Glass 2020-04-26 09:19:49 -06:00 committed by Bin Meng
parent 5f5ab0d3bf
commit 288edc7821
1 changed files with 2 additions and 13 deletions
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15
arch/x86/lib/acpi_table.c
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@ -42,19 +42,8 @@ static void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt,
rsdp->length = sizeof(struct acpi_rsdp);
rsdp->rsdt_address = (u32)rsdt;
/*
* Revision: ACPI 1.0: 0, ACPI 2.0/3.0/4.0: 2
*
* Some OSes expect an XSDT to be present for RSD PTR revisions >= 2.
* If we don't have an ACPI XSDT, force ACPI 1.0 (and thus RSD PTR
* revision 0)
*/
if (xsdt == NULL) {
rsdp->revision = ACPI_RSDP_REV_ACPI_1_0;
} else {
rsdp->xsdt_address = (u64)(u32)xsdt;
rsdp->revision = ACPI_RSDP_REV_ACPI_2_0;
}
rsdp->xsdt_address = (u64)(u32)xsdt;
rsdp->revision = ACPI_RSDP_REV_ACPI_2_0;
/* Calculate checksums */
rsdp->checksum = table_compute_checksum((void *)rsdp, 20);